2010年12月第26卷增刊2

2010年12月第26卷增刊2

Accession number:20111013735589Title:A calibration method for stem-flow sensor based on heat balance
Authors:Liu, An (1); Liu, Xu (1); Huang, Lan (1); Wen, Xing (1); Shi, Yuling (1); Wang, Zhongyi (1); Wang, Cheng (2); Hou, Ruifeng (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) National Engineering Research Center for Information Technology in Agriculture, Beijing, 100097, China
Corresponding author:Wang, Z.
(wzyhl@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:6-10
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The stem-flow of plant is one of the important plant physiological indices. In this paper, a calibration method for heat balance stem-flow sensor was proposed. According to the calibration experiment, the performance of stem-flow detection device was tested. The results showed that the value of sensor output was significantly correlated to stem-flow, (R2=0.96~0.97) with the resolution of 0.001 g/min and the precision of ±3%. Therefore, referring to the calibration experiment, the rate of stem-flow of plant can be accurately obtained, which can reflect the transpiration rate of plant and the information of moisture. It can provide an effective monitoring tool for the growth environment of plant and water-efficient irrigation.
Number of references:11
Main heading:Calibration
Controlled terms:Physiology - Sensors - Specific heat
Uncontrolled terms:Calibration method - Flow detection - Flow-sensors - Heat balance - Heat balance method - Monitoring tools - Physiological indices - Plant stem - Resolution - Sensor output - Transpiration rates
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 801 Chemistry - 641.1 Thermodynamics - 461.9 Biology
DOI:10.3969/j.issn.1002-6819.2010.z2.002
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735647Title:Early warning system for land use of villages and towns
Authors:Sang, Lingling (1); Zhang, Chao (1); Yang, Jianyu (1); Zhu, Dehai (1); Yun, Wenju (2); Pu, Wen (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) Land Consolidation and Rehabilitation Center, Ministry of Land and Resources, Beijing 100035, China
Corresponding author:Zhang, C.
(zhangchaobj@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:320-324
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Land use monitoring, assessment, early warning are the technical basis to ensure the rational allocation of land resources. According to summarizing research status of land use early warning, the paper proposed a general idea of research on land use early warning from three aspects of farmland protection, saving and intensive use of construction land, ecological security to towns and villages for the main study objects. Based on existing research results, the indicators of land use early warning system were built, and the methods of indicator values acquisition, early warning model selection and warning degree range delineation were studied. Finally, taking the Fangshan district of Beijing as empirical study area and using the former study results, farmland warning in 2015 was predicted. Part of the town of Fangshan district in 2015 may be more serious on land use warning. The results show that the early warning system has the functions of dynamic and real-time monitoring and warning for land use, and is an effective means to protect the reasonable use of the regional land and reduce the waste of resources.
Number of references:16
Main heading:Land use
Controlled terms:Predictive control systems - Research
Uncontrolled terms:Construction land - Early warning - Early Warning System - Ecological security - Empirical studies - Indicator values - Land resources - Real time monitoring - Research results - Villages and towns - Warning system
Classification code:403 Urban and Regional Planning and Development - 731.1 Control Systems - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2010.z2.061
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735662Title:Effects of 1-MCP and negative pressure osmosis treatment on storage quality of jujube fruits
Authors:Liang, Hao (1); Zhang, Mingjing (2); Wang, Baogang (1); Jiang, Weibo (1)
Author affiliation:(1) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (2) Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
Corresponding author:Zhang, M.
(mj505@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:405-409
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Storage quality of Shandong Dagua Jujube (Ziziphus jujube Mill cv. Dagua) fruits treated by 1-methylcyclopropene (1-MCP) along with negative pressure osmosis were studied. The firmness of Jujube fruits treated with 1 μL/L1-MCP for 24 h along with negative pressure osmosis were reduced. Respiration intensities and chlorophyll content of jujube fruits were remarkably delayed by 1-MCP treatment compared to control. 1-MCP treatment also delayed the increase of total soluble sugar (TSS), soluble pectin (SP) contents and color index of jujube fruit during storage. Titratable acid and reducing sugar content were maintained by 1-MCP treatment. The after-ripening course was delayed by 1-MCP treatment. The organoleptic properties of jujube with 1-MCP treatment showed that general appearance, texture, order and taste of 1-MCP treated jujube were higher than control. Research provides a basis for 1-MCP storage mechanism of jujube.
Number of references:18
Main heading:Quality control
Controlled terms:Chlorophyll - Fruits - Osmosis - Plants (botany) - Sugars
Uncontrolled terms:1-MCP - 1-methylcyclopropene (1-MCP) - Chlorophyll contents - Color index - Jujube - Negative pressure osmosis - Negative pressures - Organoleptic properties - Reducing sugars - Shandong - Soluble sugars - Storage - Storage mechanism - Storage quality - Titratable acid
Classification code:461.9 Biology - 802.3 Chemical Operations - 804.1 Organic Compounds - 821.4 Agricultural Products - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2010.z2.077
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735627Title:Development and performance of electro-hydraulic proportion control system of variable rate fertilizer
Authors:Zhang, Hui (1); Li, Shujun (1); Zhang, Xiaochao (1); Wang, Zhi (1); Wang, Weiping (1)
Author affiliation:(1) Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author:Zhang, H.
(ad.zhanghui@gmail.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:218-222
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For raising the utilization rate of fertilizer, decreasing fertilizer waste and its environmental pollution, electro-hydraulic proportion control system was developed for variable rate fertilizer applicator by using MC68HC908GP32 MCU as the core control unit. The upper computer acquires GIS information from GPS-based service to generate the position nutrient recommendation and then transmits the data to variable rate fertilization embeded system through RS485 bus. The embeded system controls hydraulic actuator and realizes variable flow rate fertilization at different position in real-time. Through static test in laboratory and dynamic practical application in field, the system was proved to be reliable for variable control with good effect. The control precision was less than 4%.
Number of references:11
Main heading:Applicators
Controlled terms:Agriculture - Control systems - Fertilizers - Hydraulics - Pollution control - Real variables
Uncontrolled terms:Control precision - Control unit - Electro-hydraulic proportion - Electro-hydraulic proportion control - Embeded systems - Environmental pollutions - Hydraulic actuator - In-field - Precision agriculture - RS-485 bus - Single-chip - Static tests - Upper computer - Utilization rates - Variable control - Variable flow rate - Variable rate - Variable rate fertilization - Variable rate fertilizer applicator - Variable rate fertilizer applicators
Classification code:921 Mathematics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 731.1 Control Systems - 632.1 Hydraulics - 601 Mechanical Design - 454.2 Environmental Impact and Protection
DOI:10.3969/j.issn.1002-6819.2010.z2.041
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735637Title:Analysis and characterization of component for bio-oil from larchwood
Authors:Wang, Pengqi (1); Chang, Jianmin (2); Wang, Yu (2); Li, Rui (2); Ren, Xueyong (2); Zhao, Jinping (1)
Author affiliation:(1) Beijing New Building Materials Public Limited Company, Beijing, 100048, China; (2) College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, China
Corresponding author:Chang, J.
(cjianmin@bjfu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:269-273
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Component of bio-oil form Larchwood by fast pyrolysis technique was completely analyzed in order to make more rational and high efficient use of new adhesive agent making by the bio-oil of Larchwood and phenolic resin. Qualitative determination of bio-oil of Larchwood was performed by Gas Chromatography-Mass Spectrometric (GC-MS) method. The study on quantitative analysis of the polyphenols in the bio-oil was used by Gas Chromatography (GC). Fourier transform infrared spectroscopy (FT-IR) was applied to characterize structure of heavy oil that were obtained through the bio-oil evaporated by rotary. Components of the bio-oil were disclosed through analyzing, which included acids, ethers, phenols, alcohols, aldehydes, alkanes, as such complex organic compounds. Results revealed content of phenols in bio-oil were ranged from 4% to 15%, maximum content was 14.15% under different treatment conditions.
Number of references:21
Main heading:Phenols
Controlled terms:Aldehydes - Ethers - Fourier transform infrared spectroscopy - Gas chromatography - Paraffins - Phenolic resins - Pyrolysis - Resins
Uncontrolled terms:Adhesive agents - Analysis and characterization - Bio-oil - Complex organic compounds - Fast pyrolysis - GC-MS - Heavy oil - Polyphenols - Quantitative analysis - Treatment conditions
Classification code:801 Chemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 815.1.1 Organic Polymers
DOI:10.3969/j.issn.1002-6819.2010.z2.051
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735623Title:Effects of water stress on growth characteristics and water use efficiency of Populus euphratica and Populus pruinosa
Authors:Wang, Haizhen (1); Han, Lu (1); Xu, Yali (2); Wang, Lin (2)
Author affiliation:(1) Key Laboratory of Biological Resource Protection and Utilization of Tarim Basin, Xinjiang Production and Construction Group, Alar, 843300, China; (2) Institute of Plants Science, Tarim University, Alar, 843300, China
Corresponding author:Han, L.
(hlzky@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:195-201
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the irrigation water utilization efficiency of farmland shelterbelt and select the appropriate tree species in the Tarim basin, the growth characteristics, the photosynthetic and chlorophyll fluorescence kinetics parameters, transpiration and water use efficiency (WUE) of Populus euphratica and Populus pruinosa were investigated with pot-culture experiment.The results showed that the photosynthetic and fluorescence kinetics parameters (except non-photochemical quenching coefficient, qN), water consumption and intensity, biomass and WUE declined with water stress, with the least values of these parameters occurring at the severe water stress. Compared with parameters under normal water irrigation, the reductions of photosynthetic and fluorescence parameters, water consumption and biomass of Populus euphratica were all lower than those of Populus pruinosa under different water stress, however, the reductions of Populus euphratica were higher than those of Populus pruinosa under severe water stress. The whole water use efficiency (WUEM), intrinsic water use efficiency (WUEP), instantaneous water use efficiency (WUEL) of Populus euphratica and Populus pruinosa were the highest under moderate stress and light stress respectively. For both poplar species, the water-consumption intensity and periodic consumption ratio reached maximum in July. Based on these findings, Populus euphratica was the preferred tree species than Populus pruinosa in establishing shelter forest on farmlands in Tarim basin. The soil water contents of forestland of Populus euphratica and Populus pruinosa should be about 45%~50% and 60%~65% of the field capacity, respectively, key time of irrigation is July.
Number of references:16
Main heading:Water supply
Controlled terms:Chlorophyll - Ecology - Fluorescence - Forestry - Growth kinetics - Irrigation - Plants (botany) - Soil moisture
Uncontrolled terms:Chlorophyll fluorescence - Field capacity - Fluorescence kinetics - Forest land - Growth characteristic - Irrigation waters - Least value - Light stress - Non-photochemical quenching - Populus - Populus euphratica - Populus pruinosa - Soil water content - Tarim Basin - Tree species - Water consumption - Water consumption characteristics - Water stress - Water use efficiency
Classification code:821.0 Woodlands and Forestry - 804.1 Organic Compounds - 741.1 Light/Optics - 821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 454.3 Ecology and Ecosystems - 446.1 Water Supply Systems - 461 Bioengineering and Biology
DOI:10.3969/j.issn.1002-6819.2010.z2.037
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735655Title:Prediction of tomato inner quality based on machine vision
Authors:Zhang, Yajing (1); Shibusawa, Sakae (2); Li, Minzan (1)
Author affiliation:(1) Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China; (2) Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
Corresponding author:Li, M.
(limz@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:366-370
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Machine vision technology was used to evaluate inner quality of tomato fruits qualitatively and quantitatively. Sixty-eight tomato samples were collected with different inner quality. A multifunctional camera system was developed to take the tomato images. Four halogen lamps were used as lighting resource and the illuminance of the camera system was about 600 lx. The camera was set in three heights, 0.5 m, 1 m, and 1.5 m, and six directions, top, bottom, left, right, front, and back. The features of the images from RGB color model, L*a*b* color model, and gray level co-occurrence matrix were calculated. In quantitative analysis, four important indexes of tomato inner quality, sugar content, acid content, amino acid content, and water content, were selected for prediction by machine vision technology. The correlations between each feature of the images and each index of inner quality were investigated and the estimation models of all four indexes were established by the features of the images with BP neural network. The correlation coefficient observed between acid content and image features was 0.536. The results showed a possibility of using image features to predict the acid content of tomato fruit. However, no significant correlations were observed between other indexes and the image features. In qualitative analysis, all tomato samples were divided into five groups based on inner quality, and then the classification and identification were conducted by the features of the images with BP neural network, too. The effect of two important model parameters, hidden node and training function, on the precision of the network was analyzed and finally optimal model parameters were determined. Twenty-eight samples were used as validation group to check the model of classification. Twenty-two samples were identified correctly. The results show the prospect to use machine vision to identify inner quality of tomato fruits.
Number of references:11
Main heading:Neural networks
Controlled terms:Agricultural machinery - Amino acids - Cameras - Computer vision - Forecasting - Fruits - Imaging systems - Lighting - Quality control - Sugars - Water content
Uncontrolled terms:Acid content - BP neural networks - Camera systems - Color models - Correlation coefficient - Estimation models - Gray level co-occurrence matrix - Halogen lamps - Hidden nodes - Image features - Machine vision - Machine vision technologies - Model parameters - On-machines - Optimal model - Qualitative analysis - Quantitative analysis - RGB Color Model - Sugar content - Tomato fruits - Training function
Classification code:913.3 Quality Assurance and Control - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 804.1 Organic Compounds - 746 Imaging Techniques - 921 Mathematics - 742.2 Photographic Equipment - 741 Light, Optics and Optical Devices - 723.4 Artificial Intelligence - 707 Illuminating Engineering - 444 Water Resources - 741.2 Vision
DOI:10.3969/j.issn.1002-6819.2010.z2.069
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735653Title:Land use structure based on ecological planning concept
Authors:Zhang, Zhanlu (1); Zhang, Yuansuo (1)
Author affiliation:(1) Department of Land Management, Renmin University of China, Beijing 100872, China; (2) Institute of Arts and Science, Beijing Union University, Beijing 100191, China
Corresponding author:Zhang, Z.
(gongwu007@sina.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:355-359
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Analysis of land-use structure is one of the contents of land-use planning. In order to apply ecological planning concept to land-use planning preferably, the ecological indicators which were suitable for land-use structure analysis were summarized and ten outer suburbs of Beijing were taken for empirical analysis. The results showed that these indicators had correlativity between each others and could well reflect actual characteristics of the present situation of land-use in each county. It is considered that ecological will be strengthened in land-use planning and the ecological methods can be applied to land-use structure analysis with the aim of providing ecological concept guidance for the follow-up work of land-use planning.
Number of references:11
Main heading:Land use
Controlled terms:Ecology - Forestry
Uncontrolled terms:Beijing city - Ecological concepts - Ecological indicators - Ecological methods - Ecological planning - Empirical analysis - Land-use planning - Present situation - Structure analysis - Structure-based
Classification code:403 Urban and Regional Planning and Development - 454.3 Ecology and Ecosystems - 821.0 Woodlands and Forestry
DOI:10.3969/j.issn.1002-6819.2010.z2.067
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735648Title:Evaluation on soil carbon contents under different cropping systems on dryland in Loess Plateau
Authors:Li, Xiaohan (1); Wang, Zhaohui (1); Hao, Mingde (1); Li, Shengxiu (1)
Author affiliation:(1) College of Resources and Environmental Science, Northwest Agriculture and Forestry University, Yangling, 712100, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (3) Key Lab for Agricultural Resources and Environmental Remediation in Loess Plateau of Agriculture, Yangling 712100, China
Corresponding author:Wang, Z.
(w-zhaohui@263.net)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:325-330
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Enhancement of the carbon sequestration capacity and carbon storage of crop land soil is one of the key measures to reduce the greenhouse gas emission and increase the soil productivity. Soil samples were taken from the 0~40 cm soil layers in the plots of fallow, monocroppings of maize, wheat and alfalfa, and rotations of pea-wheat-wheat-millet and maize-wheat-wheat-millet in a 23 year long-term field experiment. Effects of different crops and cropping systems on different carbon forms were studied in dryland soil. Results showed that compared to fallow, soil carbon contents of monocropping or rotation of different crops all increased, with total carbon increased by 35%~74%, organic carbon increased by 47%~139%, inorganic carbon increased by 20%~26%, and light fraction organic carbon increased by 3~11 times. Over different cropping systems, the alfalfa monocropping had the highest contents of total carbon, organic carbon and light fraction organic carbon in 0~15 cm soil layers, then was the rotation of the cereals-millet and the pea-cereals, and the monocropping of maize and wheat had the lowest contents of these carbon forms. However, alfalfa monocropping only increased the inorganic carbon contents in the 0~5 cm soil layer. With the increase of soil layer depth, the contents of total carbon, organic carbon and light fraction organic carbon were all observed to decrease, and the greatest decrease occurred in the alfalfa monocropping. This indicated that long term monocropping of alfalfa was an effective measure to increase soil carbon in dryland soil, especially for the organic carbon and the light fraction organic carbon. However, this increase effects are found only in the layers above 15 cm soil depth. Rotations show greater potential in increasing soil carbon than monocropping of different crops, while no significant difference is observed between the two different rotations.
Number of references:22
Main heading:Organic carbon
Controlled terms:Carbon - Crops - Forestry - Gas emissions - Global warming - Greenhouse gases - Rotation - Soil surveys - Soils
Uncontrolled terms:Carbon forms - Carbon sequestration - Carbon storage - Cropping systems - Dryland - Effective measures - Inorganic carbon - Light fraction - Loess Plateau - Long term - Monocropping - Soil carbon - Soil depth - Soil layer - Soil productivity - Soil sample - Term field - Total carbon
Classification code:821.0 Woodlands and Forestry - 804.1 Organic Compounds - 804 Chemical Products Generally - 821.4 Agricultural Products - 601.1 Mechanical Devices - 451.1 Air Pollution Sources - 451 Air Pollution - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2010.z2.062
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735663Title:Effect of pH and decoloring on apple pectin extraction with microwave-assisted
Authors:Cao, Xiamin (1); Zhou, Linyan (1); Wu, Jihong (1); Zhang, Yan (1); Liao, Xiaojun (1)
Author affiliation:(1) Key Laboratory of Fruit and Vegetable Processing Ministry of Agriculture, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Liao, X.
(liaoxjun@hotmail.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:410-415
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the yield and quality of apple pectin, the effects of extraction pH by microwave-assisted extraction (MAE) and decoloring by using adsorption of resin were studied systematically by evaluating the yield and quality of apple pectin. The results showed that the higher pH, the lower yield of apple pectin, total mineral contents and galacturonic acid (GA), However, the higher degree of esterification (DE) and average molecular weight. The polyphenols in extracted pectin was increased as pH increased by MAE, indicating that higher pH was beneficial to extract polyphenols from apple pomace. Further investigations indicated that the GA and DE of the pectin recovered from apple pomace didn't change significantly after decolourisation among all the treatments. The a*, b*, C* value, browning index and total phenolic content of decoloured sample significantly decreased while the H° value increased, which showed that decolourisation by using adsorption of resin significantly improved the color of apple pectin. It can be concluded that the parameters of pH=1.50 provide one of the most promising conditions for extracting pectin from apple pomace.
Number of references:24
Main heading:Fruits
Controlled terms:Adsorption - Agricultural wastes - Esters - Microwaves - pH effects - Phenols - Radio waves - Resins
Uncontrolled terms:Apple pectin - Apple pomace - Average molecular weight - Browning index - Decolourisation - Effect of pH - Galacturonic acids - Higher-degree - Microwave-assisted - Microwave-assisted extraction - Mineral content - Pectin - PH value - Polyphenols - Total phenolic content
Classification code:821.5 Agricultural Wastes - 821.4 Agricultural Products - 815.1.1 Organic Polymers - 804.1 Organic Compounds - 802.3 Chemical Operations - 801.1 Chemistry, General - 711 Electromagnetic Waves
DOI:10.3969/j.issn.1002-6819.2010.z2.078
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735604Title:Development of data terminal for wireless sensor network
Authors:Jiang, Jianzhao (1); Zhang, Man (1); Li, Siyu (1); Liu, Chunhong (1)
Author affiliation:(1) Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China
Corresponding author:Zhang, M.
(cauzm@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:94-97
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In wireless sensor network (WSN), gateway is the bridge connecting wireless sensor networks and the external network. Based on ARM9 and embedded Linux system, a multi-function data terminal was designed which used for data transmission, data real-time display, data local storage and historical data query, including hardware and software. The hardware is mainly consisted of an ECU, a GPRS module, several wireless sensors. And the software is composed of interface module, dialing module, remote data transmitting module, and data collecting module. The system is multi-function and has wide applications. Graphical interfaces illustrate the function above using MINIGUI, and can be operated by touch screen easily. Through the experiment in lab, the multi-function data terminal designed can work stably and reliably, and is worth of practical application.
Number of references:9
Main heading:Wireless sensor networks
Controlled terms:Computer operating systems - Display devices - Embedded software - Embedded systems - Gateways (computer networks) - Monitoring - Remote control - Search engines - Sensors
Uncontrolled terms:Data collecting - Data terminals - Data transmission - Embedded linux system - External network - GPRS module - Graphical interface - Hardware and software - Historical data - Multi-functions - Real time display - Remote data - Remote monitoring - Touch screen - Wireless sensor
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 801 Chemistry - 723 Computer Software, Data Handling and Applications - 722.2 Computer Peripheral Equipment - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2010.z2.018
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735599Title:Monitoring an invasive plant using hyperspectral remote sensing data
Authors:Wan, Huawei (1); Wang, Changzuo (1); Li, Ya (2); Wang, Qiao (1); Li, Jing (1); Liu, Xiaoman (1)
Author affiliation:(1) Environment Satellite Center, Ministry of Environmental Protection, Beijing 100029, China; (2) Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
Corresponding author:Wan, H.
(livelyhw@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:59-63
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Invasive plants can influence the local eubiosis, and threaten the safety of ecosystem. Hyperspectral remote sensing data can be used to classify the different objects with different spectral characters. So we can get the position and area of the invasive plants from the hyperspectral images, which is important to aid to the manual in-situ remove work and save the labor and resources. In this paper, the hyperspectral data on HJ-1 satellite was used to monitor the invasive plant-Solidago Canadensis in Yixing city, Jiangsu Province. Combined with the in-situ data, the pixel with maximum area was selected as pure pixel. Spectral angle mapping (SAM) method was used to locate the Solidago Canadensis in the study area. The result showed that the area of Solidago Canadensis was 212 hm2, and which was larger than actual area. HJ-1 satellite can be used to monitor the invasive plant.
Number of references:14
Main heading:Satellites
Controlled terms:Photomapping - Pixels - Remote sensing
Uncontrolled terms:Hyper-spectral images - HyperSpectral - Hyperspectral Data - Hyperspectral remote sensing data - In-situ - In-situ data - Invasive plant - Invasive plants - Jiangsu province - Pure pixel - SAM - Solidago canadensis - Spectral angle mapping - Spectral characters - Study areas
Classification code:405.3 Surveying - 655.2 Satellites - 723.5 Computer Applications - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2010.z2.012
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735633Title:Hierarchical analysis of use factors on degradation effects to engine lubricating oil
Authors:Liang, Xingyu (1); Mei, Yifan (1); Su, Bin (2); Xiong, Chunhua (2)
Author affiliation:(1) State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China; (2) Oil Material Research Institute, PLA Genera Logistics Department, Beijing 102300, China
Corresponding author:Liang, X.
(lxy@tju.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:248-252
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to effectively control the decay degradation of engine lubricating oil during actual use, the paper combined hierarchical recognition theory into recognition of the actual use factors on degradation of engine lubricating oil. Through constructing the index system and hierarchical diagnosis structure diagram of influencing factors on the degradation of engine lubricating oil and matrix utilizing hierarchical judgments, the paper identified main actual use factors that influence the degradation of engine lubricating oil. The results show that temperature is the major influencing factor in constituting lubricant degradation, and the engine condition changes and external environment will also have certain effects on lubricant degradation.
Number of references:24
Main heading:Degradation
Controlled terms:Analytic hierarchy process - Engines - Hierarchical systems - Lubricating oils - Lubrication
Uncontrolled terms:Degradation effect - Engine conditions - External environments - Hierarchical analysis - Hierarchical diagnosis - Hierarchical recognition - Index systems - Influencing factor - Lubricant degradation - matrix - Operation factors - Structure diagrams
Classification code:607.1 Lubricants - 607.2 Lubrication - 612 Engines - 802.2 Chemical Reactions - 921 Mathematics - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2010.z2.047
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735609Title:Offshore aquatic farming areas extraction method based on ASTER data
Authors:Ma, Yanjuan (1); Zhao, Dongling (1); Wang, Ruimei (2); Su, Wei (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) College of Economics and Management, China Agricultural University, Beijing 100083, China
Corresponding author:Zhao, D.
(zhaodongling@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:120-124
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With the development of RS technology, there is an important significance for exploiting the marine resources reasonably and protecting the marine ecological environment by using remote sensing data to obtain the information of offshore aquaculture, and studying the effects of offshore aquaculture. Taking the adjacent waters of Yantai City, Shandong Province as the study area, according to the spectrum characteristics of the image, a water index was constructed to extract offshore aquaculture area firstly. Then, the deep water was extracted which had similar spectrum with aquaculture area. Finally, combining the results of the two operations, the aquaculture area was isolated from the deep water. Accuracy evaluation results show that the extracted aquaculture area by using this method and on-the-spot investigation results are basically the same. The overall accuracy reached 86.14%. Thus, this method can effectively provide information basis for the farming decision.
Number of references:12
Main heading:Solvent extraction
Controlled terms:Aquaculture - Marine biology - Remote sensing - Water resources
Uncontrolled terms:Accuracy evaluation - ASTER - ASTER data - Band operations - Deep Water - Ecological environments - Extraction method - Information basis - Marine resources - Offshore aquaculture - Remote sensing data - Shandong province - Spectrum characteristic - Study areas - Water index
Classification code:444 Water Resources - 461.9 Biology - 731.1 Control Systems - 802.3 Chemical Operations - 821.3 Agricultural Methods
DOI:10.3969/j.issn.1002-6819.2010.z2.023
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735606Title:Development of wireless sensor network of field information based on ZigBee and PDA
Authors:Deng, Xiaolei (1); Zheng, Lihua (1); Che, Yanshuang (1); Li, Minzan (1)
Author affiliation:(1) Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China
Corresponding author:Zheng, L.
(zhenglh@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:103-108
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to achieve real-time acquisition, processing and visualization for field information, and shorten the time difference between data acquisition and processing, a wireless sensor network based on ZigBee and PDA was developed. The system consisted of a PDA with a ZigBee coordinator and router nodes with sensors. Via the wireless sensors network, the field information could be dynamically accessed in real time by PDA and the power supply for sensors could be controlled to save power consumption. Here the field information refers to soil moisture, soil temperature, soil electrical conductivity, air temperature and humidity. Soil temperature sensor and air temperature and humidity sensor were digital sensors, while soil moisture sensor and soil electrical conductivity sensor were analog sensors. Node communication test for different distances showed that under normal operating conditions, the packet loss rate of 40 m as only 0.092, met the requirements. In the hop test, the information could be sent from the farthest node to PDA through the self-organizing network accurately. It demonstrates that the network works stably.
Number of references:17
Main heading:Moisture control
Controlled terms:Atmospheric temperature - Data handling - Data visualization - Electric conductivity - Electric power systems - Moisture determination - Precision engineering - Routers - Sensors - Soil moisture - Visualization - Wireless networks
Uncontrolled terms:Air temperature - Analog sensors - Communication test - Digital sensors - Field information - Normal operating conditions - Packet loss rates - PDA - Power Consumption - Power supply - Real time - Real time acquisition - Self-organizing network - Soil electrical conductivity - Soil moisture sensors - Soil temperature - Time-differences - Wireless sensors networks - Zig-Bee - Zigbee coordinators
Classification code:944.2 Moisture Measurements - 902.1 Engineering Graphics - 801 Chemistry - 761 Nanotechnology - 723.2 Data Processing and Image Processing - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716.3 Radio Systems and Equipment - 716 Telecommunication; Radar, Radio and Television - 706.1 Electric Power Systems - 701.1 Electricity: Basic Concepts and Phenomena - 483.1 Soils and Soil Mechanics - 443.1 Atmospheric Properties
DOI:10.3969/j.issn.1002-6819.2010.z2.020
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735634Title:Regional classification of subsidy for purchasing agricultural machinery based on cluster analysis
Authors:Yun, Zhutian (1); Huang, Huang (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Yun, Z.
(yunzhutian0317@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:253-258
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to enhance the effect of subsidy for purchasing agricultural machinery, and allocate the subsidy resources reasonably in China, it was proposed to improve the subsidy policy for purchasing agricultural machinery by studying regional classification. In this paper, grain production capacity, economy level, purchasing ability of farmers and natural conditions were considered to be the four main factors that influence the regional classification, and grain production, per capita GDP, per capita net income of farmers, and the proportion of mountain area were selected as the indicators. The subsidy for purchasing agricultural machinery was classified by using Q-type Hierarchical Cluster Analysis, and the whole 31 provinces were classified into four types of regions based on qualitative adjustment. Policy suggestions on optimization of the subsidy for purchasing agricultural machinery were proposed in the aspects of amount and structure of the subsidy, the type of agricultural machinery and subsidy standards based on regional characteristics and the current status of agricultural mechanization.
Number of references:18
Main heading:Cluster analysis
Controlled terms:Agricultural machinery - Agriculture - Equipment - Grain (agricultural product) - Hierarchical systems - Planning - Regional planning - Sales
Uncontrolled terms:Agricultural mechanization - Current status - Grain production - Hierarchical cluster analysis - Natural conditions - Per capita - Per capita net income - Policy suggestions - Regional characteristics - Subsidy for purchasing
Classification code:922 Statistical Methods - 911.4 Marketing - 901 Engineering Profession - 961 Systems Science - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 403.2 Regional Planning and Development - 403 Urban and Regional Planning and Development - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2010.z2.048
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735624Title:Forecast of soil salinization change trend based on Markov chain
Authors:Wang, Xiuni (1); Zhang, Rongqun (1); Zhou, De (2); Cai, Simin (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agriculture University, Beijing 100083, China; (2) College of Resources and Environment, China Agricultural University, Beijing 100094, China
Corresponding author:Zhang, R.
(zhangrq@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:202-206
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To reveal the law of soil salinization evolution in Yinchuan plain, In this study, the information of soil salinization of Yinchuan Plain was extracted from TM image in April 2000, CBERS images in April 2004, and China's environmental satellite image in April 2009, which acquired the distribution figure of soil salinization of the Yinchuan Plain in three periods. The 2000 data was regarded as the model's initial state. The data in 2000-2004 was used for establishing probability transfer matrix of soil salinization of Yinchuan Plain that was used for simulating dynamic trend of soil salinization in Yinchuan plain and testing its accuracy. Test for model X2 shows that there exists no significant difference between the model predictions and the actual values, these two being in good agreement. Model results show that under the current driving force, the saline soil area will be stable, the area of severe salinization, moderate salinization and mild salinization will be 450.23, 451.66, and 1469.84 square kilometers, respectively, accounting for 30.42% of total area, which will decrease by 5.86% than in 2000 (36.28%), 100 years later. Using markov model to predict the soil salinization in Yinchuan plain is feasible, and the prediction results can be used for providing the theoretical basis for soil salinization management.
Number of references:13
Main heading:Geologic models
Controlled terms:Environmental regulations - Forecasting - Markov processes - Remote sensing - Salinity measurement - Soil testing - Soils - Transfer matrix method
Uncontrolled terms:Change trends - Current driving - Environmental satellites - Initial state - Markov Chain - Markov model - Model prediction - Model results - Saline soil - Soil salinization - Theoretical basis - TM image - Transfer matrixes - Yinchuan plain
Classification code:454.2 Environmental Impact and Protection - 481.1 Geology - 483.1 Soils and Soil Mechanics - 731.1 Control Systems - 921 Mathematics - 922.1 Probability Theory
DOI:10.3969/j.issn.1002-6819.2010.z2.038
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735658Title:Successive projections algorithm for variable selection in nondestructive measurement of citrus total acidity
Authors:Hong, Ya (1); Hong, Tiansheng (1); Dai, Fen (1); Zhang, Kun (1); Chen, Houwen (1); Li, Yan (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agricultural Machine and Equipment, College of Engineering, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Hong, T.
(tshong@scau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:380-384
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The total acidity is an important index in the citrus internal quality assessment. In order to minimize variable collinearity effects in the calibration data set, reduce the modeling variables to alleviate the computation workload, a novel variable selection strategy-successive projections algorithm (SPA) was employed to optimize the near infrared spectrum testing model of citrus total acidity. The splice correction method was used to correct the original NIR spectra. The outlier samples were analyzed by studentized residual error and regression line. After outlier samples eliminated, The SPXY (sample set partitioning based on joint x-y distances) method was used to subset partitioning. Finally, the "Successive Projections Algorithm" (SPA) was applied to select the optimal sets of variables for calibration, and then the prediction performance comparison between the model built by the selected variables and full-spectrum-PLS model, the influence of the orange peel to the total acidity model prediction accuracy is also analyzed in this paper. As can be seen, nine and thirteen optimal effective variables were selected from full-spectrum variables by SPA, for the total acidity determination with the whole fruit samples and the flesh samples, respectively. SPA-MLR, SPA-PLS and full-spectrum-PLS were comparable in terms of prediction performance for the total acidity determination with the whole fruit samples. The prediction set correlation coefficient (Rp) of the total acidity determination with the whole fruit samples was 0.829470, 0.837095 and 0.857299, respectively. While SPA-MLR and SPA-PLS resulted in models with good prediction ability when compared to full-spectrum PLS model for the total acidity determination with the flesh samples. The Rp of the total acidity determination with the flesh samples was 0.819430, 0.825277 and 0.780146, respectively. The SPA improves the prediction ability of the total acidity determination with the flesh samples effectively.
Number of references:21
Main heading:Citrus fruits
Controlled terms:Algorithms - Calibration - Forecasting - Fruits - Infrared devices - Near infrared spectroscopy - Optimization - Spectrometry - Statistical tests
Uncontrolled terms:Citrus - Near infrared (NIR) spectrometry - Non-destructive measurement - Successive projections algorithm - Total acidity - Variable selection
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922.2 Mathematical Statistics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 921.5 Optimization Techniques - 821.4 Agricultural Products - 741.3 Optical Devices and Systems - 723 Computer Software, Data Handling and Applications - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.z2.072
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735598Title:Maize yield estimation at province scale by interpolation of TM and MODIS time-series images
Authors:Gu, Xiaohe (1); He, Xin (1); Guo, Wei (1); Huang, Wenjiang (1); Yan, Rongjiang (2)
Author affiliation:(1) National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) Yongkang Meteorological Administration, Yongkang 321300, China
Corresponding author:Gu, X.
(guxh@nercita.org.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:53-58
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This study aims to overcome the shortage of the temporal variance and small coverage of TM images, which makes low accuracy for estimating the crop yield at province scale. The paper chose the maize yield in Shandong province in 2008 as the object of study. The data used in the paper mainly included six TM images with different phenophase of maize and the long time-series MODIS images with full coverage. The paper developed the time-series interpolating model based on the growth process of maize, which could interpolate the TM images with different phenophase into the dataset with the same milky maturity period of maize. Then through the in-situ measured samples of per unit area yield, the paper set up yield estimation models including ground-TM model and TM-MODIS model to obtain the full coverage yield information of maize at province scale. Results show that the method of yield estimation at province scale based on time-series interpolating model could make the most of the advantage of TM and MODIS data and avoid the regional disparity of NDVI derived from the temporal difference of TM images. The paper could reach high accuracy in the estimation of per unit area yield of maize in Shandong province. This will provide a new method to estimating crop yield at province scale.
Number of references:21
Main heading:Estimation
Controlled terms:Crops - Interpolation - Radiometers - Remote sensing
Uncontrolled terms:Maize - MODIS - Province scale - Time-series interpolation - TM - Yield estimation
Classification code:731.1 Control Systems - 821.4 Agricultural Products - 921 Mathematics - 921.6 Numerical Methods - 944.7 Radiation Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2010.z2.011
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735592Title:Locust images detection based on fuzzy pattern recognition
Authors:Zheng, Yongjun (1); Wu, Gang (1); Wang, Yiming (2); Mao, Wenhua (3)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (3) Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author:Wang, Y.
(ym_wang@263.net)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:21-25
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Locust control is the focus of agricultural pest management. As a complement of manually monitoring, low-attitude airborne early warning system can be used to monitor locusts by identifying and counting them from the captured locust image. The experimental field was at Qingyuan, Guangdong. Locust images were captured by digital camera. By contrastive analysis of the average of R, G and B value of locust area and background, a method of extra-green absolute value was adopted to segment locusts from the background. The area and perimeter of each locust were obtained by comparing area statistical value. Fuzzy sets of individual locust object and connected locust regions were established respectively. Individual locust or connected locust regions were determined by the maximum membership degree principle. The accuracy of the fuzzy recognition of individual and connected locust region was 89%, which could satisfy the requirement of locust pre-warning.
Number of references:16
Main heading:Fuzzy logic
Controlled terms:Cameras - Fuzzy sets - Image recognition
Uncontrolled terms:Absolute values - Agricultural pests - Airborne early warning systems - B value - Contrastive analysis - Early warning - Fuzzy pattern recognition - Fuzzy recognition - Locust - Membership degrees
Classification code:716 Telecommunication; Radar, Radio and Television - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 742.2 Photographic Equipment - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.z2.005
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735597Title:Mapping paddy fields by using spatial and temporal remote sensing data fusion technology
Authors:Wu, Mingquan (1); Niu, Zheng (1); Wang, Changyao (1)
Author affiliation:(1) The State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101, China
Corresponding author:Wu, M.
(wumq@irsa.ac.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:48-52
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to solve the problem of data loss in mapping paddy fields, a novel rice extraction method was proposed in this paper by using spatial and temporal remote sensing data fusion technology (STDFT). Using the temporal change information extracted from time series MODIS data, combining with the texture information of Landsat-ETM+ data at former, fusion data was produced which had the same temporal resolution with MODIS data and the same spatial resolution with Landsat-ETM+ image. Then using fusion data in critical period, rice fields was mapped through SVM. The algorithm had been tested over a study area in Jiangning Country, Nanjing City, Jiangsu Province, China. Results showed that this method could map rice effectively. High mapping precision of 93% was acquired with Kappa coefficient of 0.96.
Number of references:17
Main heading:Image fusion
Controlled terms:Crops - Information fusion - Mapping - Radiometers - Remote sensing - Time series
Uncontrolled terms:Critical periods - Data loss - Extraction method - Jiangsu province - Kappa coefficient - Landsat - MODIS - Nanjing - Paddy fields - Remote sensing data fusion - Rice extraction - Rice fields - Spatial resolution - Study areas - Temporal change - Temporal resolution - Texture information
Classification code:944.7 Radiation Measuring Instruments - 922.2 Mathematical Statistics - 903.1 Information Sources and Analysis - 902.1 Engineering Graphics - 821.4 Agricultural Products - 731.1 Control Systems - 723.2 Data Processing and Image Processing
DOI:10.3969/j.issn.1002-6819.2010.z2.010
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735588Title:Rapid detection of vegetable pesticide residue based on hyperspectral fluorescence imaging technology
Authors:Chen, Jingjing (1); Peng, Yankun (1); Li, Yongyu (1); Wang, Wei (1); Wu, Jianhu (1); Shan, Jiajia (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Peng, Y.
(ypeng@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:1-5
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Traditional methods of pesticide residue detection are time-consuming, complicated, and require a lot of pretreatment processes. In this study, hyperspectral imaging technology combined with fluorescence analysis was used for determining trace chemicals in vegetable samples. Hyperspectral fluorescence images of chlorpyrifos in the range of 400~1100 nm for vegetable samples were acquired, and the fluorescence emission spectral curves from the hyperspectral images were extracted by ENVI 4.3 analysis software. The results show that chlorpyrifos have strong fluorescence characteristic when methanol is used as solvent. The emission spectrum of chlorpyrifos indicates that the peak emission wavelength is 437 nm, and hlorpyrifos samples with different concentration have different fluorescence emission spectral intensity at the peak, and fluorescence emission peak value reduces when the concentration of chlorpyrifos decreases. The results can provide theoretical basis for developing rapid detection instrument for vegetable pesticide residue.
Number of references:20
Main heading:Fluorescence
Controlled terms:Detectors - Emission spectroscopy - Imaging techniques - Methanol - Organic solvents - Pesticides - Trace analysis - Vegetables - Vegetation
Uncontrolled terms:Chlorpyrifos - Emission spectrums - Fluorescence analysis - Fluorescence characteristics - Fluorescence emission - Fluorescence emission peaks - Fluorescence image - Fluorescence imaging - Hyper spectral imaging - Hyper-spectral images - HyperSpectral - Peak emission wavelength - Pesticide residue - Pretreatment process - Rapid detection - Theoretical basis - Vegetable samples
Classification code:914 Safety Engineering - 821.4 Agricultural Products - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 803 Chemical Agents and Basic Industrial Chemicals - 801 Chemistry - 746 Imaging Techniques - 741.1 Light/Optics - 741 Light, Optics and Optical Devices
DOI:10.3969/j.issn.1002-6819.2010.z2.001
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735635Title:Tar character and cleaning of biomass gasification gas
Authors:Jin, Liang (1); Tong, Ruiming (2); Zhou, Jinsong (1); Wu, Yuanmou (1); Luo, Zhongyang (1)
Author affiliation:(1) State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; (2) Zhejiang Electric Power Corporation, Hangzhou 310002, China
Corresponding author:Zhou, J.
(zhoujs@cmee.zju.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:259-263
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Biomass gasification is a potential technology for providing clean gas in rural area. However, high contents of tar and ash in the gas have become serious problems, because it not only sends out offensive odour, but also clogs the gas pipe. A downdraft gasifier was used as gas generator, tar and ash content in the gas were studied. Besides, the gas cleaning efficiency of cleaning devices, including water spraying device and drying device, were also studied. The results showed that reduction zone temperature has a significant influence on tar and ash producing. High temperature (above 650°C) could reduce tar and ash contents (lower than 2000 mg/m3). Besides, using water-spraying and drying devices, efficiency of gas cleaning devices reached 99.5%, tar and ash contents after cleaning were below 10 mg/m3, accord the gas cleaning demand.
Number of references:21
Main heading:Gasification
Controlled terms:Biomass - Cleaning - Gas generators - Gases - Rural areas - Tar
Uncontrolled terms:Ash contents - Biomass Gasification - Clean gas - Cleaning devices - Gas cleaning - Gas pipes - Gasifiers - High temperature - High-content - Potential technologies - Reduction zones - Water spraying
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 821.5 Agricultural Wastes - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 802.3 Chemical Operations - 524 Solid Fuels - 522 Gas Fuels - 513 Petroleum Refining - 411 Bituminous Materials
DOI:10.3969/j.issn.1002-6819.2010.z2.049
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735596Title:Image features measurement of maize ear based on background plate scale
Authors:Lü, Yongchun (1); Ma, Qin (1); Li, Shaoming (1); Zhu, Dehai (1); Zhang, Xiaodong (1); Yang, Jianyu (1); Liu, Zhe (1); Wang, Hu (1); He, Haocheng (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Li, S.
(lshaoming@sina.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:43-47
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Geometric features measurement of maize ear is the key technology of maize cultivar automatic analysis. But it is difficult to measure the geometric features(total length, width, bald, volume, etc) of maize quickly and accurately for the complexity of the background image. In this paper, three regional image enhancement model was constructed according to the distribution characteristics of maize gray image. Then the morphological image processing methods were applied to segment the enhanced image and calculate the background plate scale. Based on the above background plate scale, the geometric feature parameters of maize could be computed accurately. In addition, an analysis was made in comparison with manual measure of maize feature. The comparison result showed that the image processing algorithm based on the background plate scale could measure the maize geometric feature accurately. The accuracy rate was above 96.01%. This algorithm raised in this paper can replace the traditional maize cultivar measure and realize the maize cultivar automatic analysis, which will play an important role in maize variety extension and breeding.
Number of references:21
Main heading:Image segmentation
Controlled terms:Algorithms - Geometry - Image recognition - Imaging systems - Processing
Uncontrolled terms:Accuracy rate - Automatic analysis - Background image - Background plate scale - Comparison result - Distribution characteristics - Geometric feature - Gray image - Image features - Image processing algorithm - Key technologies - Maize cultivars - Maize ear image - Morphological image processing - Morphological segmentation - Total length
Classification code:716 Telecommunication; Radar, Radio and Television - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 746 Imaging Techniques - 913.4 Manufacturing - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.z2.009
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735600Title:Recognition of managing phase of shelterbelt by remote sensing
Authors:Deng, Rongxin (1); Li, Ying (1); Zhang, Shuwen (1); Wang, Wenjuan (3); Shi, Xiaoliang (1)
Author affiliation:(1) Northeast Institute of Geography and Agriculture Ecology, Chinese Academy of Science, Changchun 130012, China; (2) Graduated School of Chinese Academy of Science, Beijing 100049, China; (3) Department of Resources and Environmental Sciences, Henan University of Finance and Economics, Zhengzhou 450002, China
Corresponding author:Li, Y.
(liying@neigae.ac.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:64-68
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The main purpose of this paper is to recognize the managing phase of shelterbelt by remote sensing, which can provide timely information for manager of shelterbelt. In this paper, by using multi-temporal remote sensing images, combined with the theory of management for shelterbelt, a method for monitoring the managing phase of the shelterbelt was established. Taking an area of 10 km × 10 km in northern Changchun as examples, we used the TM and ETM images to analyze the managing phase of the shelterbelt in the area, and compared the relative precision resulted from different monitoring period. The results showed that, compared with the results of the annual monitor, the whole precision of three years period was 84.8%, and that in the period of six years was 78.4%. Therefore, based on an overall consideration of computation efficiency, data availability and monitor precision, it is concluded that monitoring result of three years period can not only coincide with the growth and development law of shelterbelt, but also has an acceptable precision.
Number of references:16
Main heading:Remote sensing
Controlled terms:Forestry - Image reconstruction - Timber
Uncontrolled terms:Computation efficiency - Data availability - Growth and development - Monitoring periods - Multi-temporal monitor - Multi-temporal remote sensing - Phase of management - Shelterbelt
Classification code:415.3 Wood Structural Materials - 731.1 Control Systems - 741 Light, Optics and Optical Devices - 821.0 Woodlands and Forestry
DOI:10.3969/j.issn.1002-6819.2010.z2.013
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735621Title:Loss characteristics of agricultural non-point source pollutants under controlled drainage
Authors:Li, Qiangkun (1); Hu, Yawei (1); Sun, Juan (1); Li, Huaien (3)
Author affiliation:(1) Yellow River Institute of Hydraulic Research, Yellow River Conservancy Commission, Zhengzhou 450003, China; (2) Key Laboratory of the Yellow River Sediment of Ministry of Water Resource, Zhengzhou 450003, China; (3) Institute of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author:Li, Q.
(Liqiangk@126.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:182-187
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The contrast test of monitoring uncontrolled drainage and controlled drainage were carried out at the Qing Tong Xia Irrigation District in Ningxia Hui Autonomous Region. The concentration and load variation characteristics of salinity, total phosphorus, nitrate-nitrogen and ammonia-nitrogen in farmland drainage under controlled drainage condition were analyzed, and the mechanism of reducing drainage and sewage was discussed. The results showed that comparing to uncontrolled drainage, with controlled drainage, the drainage amount would reduce by 43.01%, the concentration of salinity, total phosphorus, nitrate-nitrogen and ammonia-nitrogen would reduce by 7.68%, 17.39%, 18.16%, 9.20% respectily, and the pollution load would reduce by 46.49%, 44.46%, 57.51%, 38.89% respectively. The reduction of pollution load results from joint actions of drainage reduction and pollution concentration decrease. The drainage reduction plays the leading role and pollutant concentration decrease is the secondary factor.
Number of references:15
Main heading:Pollution control
Controlled terms:Agriculture - Ammonia - Concentration (process) - Nitrogen - Phosphorus - Pollution induced corrosion - Salinity measurement - Sewage
Uncontrolled terms:Ammonia-nitrogen - Controlled drainage - Farmland drainage - Irrigation districts - Joint actions - Load variations - Loss characteristics - Nitrate nitrogen - Non-point source pollutants - Non-point source pollution - Pollutant concentration - Pollution concentration - Pollution loads - Total phosphorus
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 454.2 Environmental Impact and Protection - 452.1 Sewage - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.z2.035
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735626Title:Variation trends analysis of runoff and sediment time series based on R/S method in Wuding River Basin
Authors:Zhang, Xin (1); Cai, Huanjie (1); Yin, Xiaonan (1)
Author affiliation:(1) College of Water Resources and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Zhang, X.
(zhxin@nwsuaf.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:212-217
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Changes in runoff and sediment are caused by precipitation, evaporation, and underlying surface conditions. The policy-making basis for the water resources reasonable use was provided by revealed the variation trends of runoff and sediment time series and causes in this paper. To study the complex stochastic and undulatory property of the runoff and sediment time series, an R/S method was used. Through the time-varying Hurst index, the variation trends of runoff and sediment time series were investigated. Results showed that the Hurst indices of runoff time series were 0.56, 0.61 in Zhaoshiyao Hydrological Station and Baijiachuan Hydrological Station, a long-term positive correlation of runoff time series was showed. There were two jump points in the Hurst index of sediment time series in Zhaoshiyao Hydrological Station, occurred in 1966 and 1979, respectively, which showed fractal properties. There were three jump points in the Hurst index of sediment time series in Bjiajiachuan Hydrological Station, occurred in 1966, 1972 and 1979, with the four-scale distribution of the Hurst index of 0.59, 0.41, 0.99 and 0.81, respectively. The first two scale range of Hurst index was 0.5 or so, subject to Brownian motion; while the latter two scale range of Hurst index approached to 1.0, with fractal characteristics. Therefore, the runoff and sediment time series at the two hydrological stations in future will be the same trends as in the past period, i.e., with continued downward trend. Human activity is the main reason for this change.
Number of references:13
Main heading:Time series analysis
Controlled terms:Anoxic sediments - Brownian movement - Fractals - Runoff - Sedimentology - Silt - Time series - Water resources
Uncontrolled terms:Brownian motion - Fractal characteristics - Fractal properties - Human activities - Hurst index - Policy making - Positive correlations - R/S analytical method - R/S method - River basins - Scale distributions - Time varying - Underlying surface
Classification code:922.2 Mathematical Statistics - 921 Mathematics - 483.1 Soils and Soil Mechanics - 931 Classical Physics; Quantum Theory; Relativity - 483 Soil Mechanics and Foundations - 444.1 Surface Water - 444 Water Resources - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2010.z2.040
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735631Title:Design of single-phase AC-chopper regulator with four step commutation
Authors:Zhong, Cheng (1); Du, Haijiang (1); Yang, Minghao (1); Chao, Hongxuan (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China
Corresponding author:Yang, M.
(mhy@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:238-241
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to solve low accuracy regulating, high harmonic in the common AC regulator and improving equipment quality of power supply, the paper adopt AC chopping technique to design a new generation regulator with advantages of no-contact, no-leave and low harmonic etc. Refer to four-step commutation of matrix converter based on current direction, it can solve open over-voltage problem in AC chopper commutation. In addition, the current direction detection circuit was designed to guarantee correctness. Simulation and experiment results show that the regulator with this control mode is safe and reliable, low harmonic, fast and accurate response.
Number of references:13
Main heading:Harmonic analysis
Controlled terms:Electric current measurement - Electric power supplies to apparatus - Power converters
Uncontrolled terms:AC-chopper - Accurate response - Choppers - Commutation - Control modes - Current detection - Current direction - Detection circuits - Equipment quality - High harmonics - Matrix converter - No-contact - On currents - Over-voltages
Classification code:704.2 Electric Equipment - 715.2 Industrial Electronic Equipment - 921.6 Numerical Methods - 942.2 Electric Variables Measurements
DOI:10.3969/j.issn.1002-6819.2010.z2.045
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735656Title:Simulation of high voltage square wave pulse network for liquid food processing
Authors:Zhang, Xihai (1); Jiang, Wei (2); Li, Qichao (1); Fang, Junlong (1)
Author affiliation:(1) Engineering College, Northeast Agricultural University, Harbin 150030, China; (2) Computer Department, Harbin Finance University, Harbin 150030, China
Corresponding author:Zhang, X.
(xhzhang@neau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:371-374
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to further improve sterilization ratio for the liquid foods using pulsed electric field and prolong shelf life, the pulse-generating network of unipolar square wave was designed based on the waveform and energy efficient. Through calculating the liquid food equivalent circuit and obtaining the discharge capacitance value according to energy threshold, the pulse-generating network parameters were derived. The modeling and simulation of square wave pulsed circuits were conducted by using power system block toolbox and obtained the square wave with peak value of 35 kV, flat top pulse and rapidly decline. It shows that the simulation of pulse-generating network is a feasible approach and the results can provide theoretical basis for improving pulse-generating circuit.
Number of references:8
Main heading:Pulse generators
Controlled terms:Computer simulation - Electric discharges - Electric fields - Electric generators - Food processing - Liquids - Processed foods - Sterilization (cleaning)
Uncontrolled terms:Capacitance values - Energy efficient - Energy thresholds - Flat-top - High voltage - Liquid food - Modeling and simulation - Network parameters - Peak values - Power systems - Pulsed electric field - Shelf life - Simulation - Square waveform generators - Square waves - Sterilization - Theoretical basis - Wave forms
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 822.3 Food Products - 822.2 Food Processing Operations - 723.5 Computer Applications - 713.4 Pulse Circuits - 705.2 Electric Generators - 701.1 Electricity: Basic Concepts and Phenomena
DOI:10.3969/j.issn.1002-6819.2010.z2.070
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111113736086Title:Primary validation of improved SYNTAM aerosol retrieval model in Beijing region using AERONET data
Authors:Feng, Jianzhong (1); Bai, Linyan (2)
Author affiliation:(1) Key Laboratory of Digital Agricultural Early-warning Technology Ministry of Agriculture, Institute of Agriculture Information, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (2) Center for Earth Observation and Digital Earth Chinese Academy of Sciences, Beijing 100101, China; (3) Key Lab of Resources Remote Sensing and Digital Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Corresponding author:Bai, L.
(lybai@ceode.ac.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:69-73
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, a synergy of the moderate resolution imaging Spectroradiometer (MODIS) onboard Terra and Aqua satellites (SYNTAM) algorithm was improved to retrieve the atmospheric aerosol optical thickness (AOT) in Beijing region, and its results were compared with the Aerosol Robotic Network (AERONET) observations as ground truth in order to be validated. Firstly, a series of statistical values were obtained based on the corresponding AOT values from retrieval, in accordance with a convolution scheme with a pre-defined fixed window size. Secondly, the results of the AERONET observations associated with both spatially and temporally were contrastively analyzed to find the relevant correlations between the fore and the latter, and the effectiveness of the SYNTAM algorithm was properly assessed. The results show that the improved algorithm is greatly applicable and available in Beijing region because the AOT values, retrieved by it, are very highly consistent with the real values on related ground sites, and is quite significant with respect to air environmental monitoring and effect analysis of sun-light stress for crop growing.
Number of references:18
Main heading:Atmospheric aerosols
Controlled terms:Algorithms - Atmospheric thermodynamics - Cultivation - Differential equations - Image retrieval - Inverse problems - Radiometers - Remote sensing - Satellite imagery
Uncontrolled terms:AERONET - AERONET data - Aerosol optical thickness - Aerosol retrieval - Aerosol robotic networks - Aqua satellites - Convolution schemes - Effect analysis - Environmental Monitoring - Ground truth - Improved algorithm - Light stress - Moderate resolution imaging spectroradiometer - Real values - Retrieval Model - SYNTAM - Validation - Window Size
Classification code:921.2 Calculus - 921 Mathematics - 821.3 Agricultural Methods - 944.7 Radiation Measuring Instruments - 741 Light, Optics and Optical Devices - 443.1 Atmospheric Properties - 443 Meteorology - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2010.z2.014
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735591Title:Nitrogen evaluation of winter wheat based on color features of canopy images
Authors:Zhu, Hong (1); Zheng, Limin (1); Yin, Jianling (1); Wu, Funing (2)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) College of Agronomy and Bio-technololgy, China Agricultural University, Beijing 100193, China
Corresponding author:Zhu, H.
(zhuhongxie@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:16-20
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The nitrogen status (N-status) evaluation of winter wheat by using computer image processing technology to extract the color features of wheat canopy image was researched in this paper. In the paper, seven statistics of color histogram were calculated based on these color components: R,G,B,H,S,I and L from RGB and HIS color system. The different color features were selected from the statistics for expressing seven main growth periods after reviving of wheat. The results showed that these features could efficiently express the canopy color of wheat under varied N-status, especially to express low N-status and high N-status, and showed significant diversity of canopy color of wheat with different modes and phases of applying nitrogen fertilizer under the same total nitrogen quantity. This approach can provide an effective way to evaluate N-status of wheat by using wheat canopy image.
Number of references:9
Main heading:Color
Controlled terms:Crops - Feature extraction - Image processing - Image recognition - Nitrogen - Nitrogen fertilizers
Uncontrolled terms:Color component - Color features - Color histogram - Color systems - Computer image processing - Different modes - Growth period - Total nitrogen - Wheat canopy - Winter wheat
Classification code:741 Light, Optics and Optical Devices - 741.1 Light/Optics - 804 Chemical Products Generally - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.z2.004
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735605Title:Field information collection system for characteristic and tropical farming based on RFID
Authors:Wang, Lingling (1); Huang, Jiajian (2); Weng, Shaojie (1); Cao, Jianhua (3); Lu, Kun (3)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Hainan University, Danzhou 571737, China; (2) Farm Design Institute in Hainan, Haikou 570226, China; (3) Institute of Information and Technology, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China
Corresponding author:Weng, S.
(WSJ610818@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:98-102
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Tropical agriculture in Hainan is relatively lagged behind with low level of productive forces and technology, and mainly depends on manpower. What is more, manufacturing management is non-standard. So the reputation of product may be influenced. These may also harm the interests of consumers. In order to solve the problems, RFID technology was used to develop tropical agriculture, combining with sensor technology, virtual instrument (LabVIEW) technology and microcontroller technologies. The information of environmental and crops property can be acquired in process of tropical agriculture production and the data are stored to RFID tags in binary code. The eventual aim is to reach high efficiency management and high quality in agriculture production, and retrace the production in agricultural products supply chain by RFID. The system is verified feasible through an experimental study on identifying information of RFID tags on Qiongzhong green orange.
Number of references:11
Main heading:Cryptography
Controlled terms:Agricultural products - Radio frequency identification (RFID) - Radio navigation - Sensors - Supply chain management - Supply chains - Technology - Tropics
Uncontrolled terms:Experimental studies - High efficiency - High quality - In-process - Information collections - LabVIEW - Low level - Manufacturing management - Microcontroller technology - RF-ID tags - RFID - RFID Technology - Sensor technologies - Tropical agricultural - Tropical agriculture - Virtual instrument
Classification code:913 Production Planning and Control; Manufacturing - 912 Industrial Engineering and Management - 901 Engineering Profession - 821.4 Agricultural Products - 801 Chemistry - 723 Computer Software, Data Handling and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716.3 Radio Systems and Equipment - 716 Telecommunication; Radar, Radio and Television - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2010.z2.019
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735641Title:Simulation of greenhouse environment SVMR control based on plant response
Authors:Wang, Dingcheng (1); Qiao, Xiaojun (2); Wang, Chunxiu (1); Zhu, Tianyi (1)
Author affiliation:(1) School of Computer and Software, Nanjing University of Information Science and Technology, Nanjing 210044, China; (2) National Engineering Research Center for Information Technology in Agriculture, Beijing 100083, China
Corresponding author:Wang, D.
(dcwang2005@126.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:290-293
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In the greenhouse environment control, it is hard to gain the control object value correctly to take expert empirical set point as control object traditionally, because of the limitation of expert experience and the adaptability of crop growth, thus the greenhouse produce efficiency is affected. This paper presented a control method for the greenhouse environment, which can automatically set the environment control object according to the crop growth response by simulation. With this method the control objective value can be set automatically by model of greenhouse environment change and the crop growth using genetic algorithm, and OS-LSSVMR(online spare least square support vector machines regression) internal model control with good stability and robustness was adapted to carry on greenhouse environment control. The simulation results show that the method requires less energy, and more dry matter can be gained, it can gain more precision control compared with the traditional control method. Therefore, the method has the characteristics of energy saving and good stability, and can enhance the economic effectiveness of greenhouse production.
Number of references:13
Main heading:Greenhouses
Controlled terms:Crops - Genetic algorithms - Least squares approximations - Model predictive control - Support vector machines
Uncontrolled terms:Control methods - Control objectives - Control objects - Crop growth - Dry matters - Economic effectiveness - Energy saving - Environment control - Expert experience - GA - Good stability - Greenhouse environment - Greenhouse production - Internal model control - Least square support vector machines - Plant response - Precision control - Set-point - Simulation - Simulation result - SVMR
Classification code:723 Computer Software, Data Handling and Applications - 731 Automatic Control Principles and Applications - 732 Control Devices - 821.4 Agricultural Products - 821.6 Farm Buildings and Other Structures - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2010.z2.055
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735661Title:Technology of single cell protein feed production from raw potato starch residue by multi-strains solid fermentation
Authors:Yun, Jianmin (1); Liu, Longsheng (2); An, Zhigang (1); Su, Yongsheng (2); Guo, Bin (2)
Author affiliation:(1) College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China; (2) Institute of Livestock Grass and Green Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China
Corresponding author:Yun, J.
(yunjianmin@gsau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:399-404
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The aim of this study was to raise the nutrition of potato starch residue. In the fermentation production of single cell protein(SCP) feed, potato starch residue was employed as main material, and bran together with horsebean straw powder were used as supplementary material. The mixed raw material was degraded with cellulose enzyme, and then was saccharified with saccharifying koji of Aspergillas niger and Trichoderma koningii to form a solid degradation mixture. The mixture was fermented in solid after inoculating 3 strains, Geotrichum candidum,Candida utilis, and Saccharomgces cerevisae to get SCP feed succefully at 28°C for 55 hours. The rate of inoculating amount was 8:1.5:0.5. The quality index of SCP feed including protein, rude starch and sensory characteristics were analysized. The results showed that the protein content of the fermented product was increased from 4.08% to 16.52%, raised by 12.44%, and the bad smell was also eliminated after fermentation. Multi-strains fermentation is one of the feasible technique approaches to resolve the problem of potato starch residue.
Number of references:18
Main heading:Starch
Controlled terms:Agricultural wastes - Fermentation - Proteins
Uncontrolled terms:Aspergillas niger - Candida utilis - Geotrichum candidum - Non-heat-treated potato starch residue - Potato starches - Protein contents - Quality indices - Raw potato starch - Sensory characteristics - Single cell proteins - Solid degradation - Solid fermentation - Solid fermentations - Trichoderma koningii
Classification code:802.2 Chemical Reactions - 804.1 Organic Compounds - 821.5 Agricultural Wastes
DOI:10.3969/j.issn.1002-6819.2010.z2.076
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735616Title:Effects of chemical fertilizer combined crushed straw application on yield and water use efficiency of winter wheat
Authors:Dong, Qinge (1); Feng, Hao (1); Du, Jian (2)
Author affiliation:(1) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (2) Institute of Soil and Water Conservation, Northwest University of Agriculture and Forestry, Yangling 712100, China; (3) Graduate School of Chinese Academy of Sciences, Beijing 100049, China
Corresponding author:Feng, H.
(nercwsi@vip.sina.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:156-162
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To further study the effects of chemical fertilizer combined crushed straw application on wheat yield and water consumption of winter wheat, seven varieties of winter wheat, which including "xi nong9871", "li gao6", "yan mai9710", "shaan139", "heng guan35", "zhong yuan98-68"and "xiao yan22",were investigated with chemical fertilizer combined crushed straw. The results indicated that under the chemical fertilizer combined crushed straw and conventional fertilizer condition, the total water consumption was similar among different varieties of winter wheat, but the amount of invalid water consumption was reduced evidently. The amount of transpiration was increased and the amount of invalid evaporation about 12 mm was translated into valid transpiration owing to the use of chemical fertilizer combined crushed straw,and the water consumption of different varieties had no difference evidently under the same fertilizer. The chemical fertilizer combined crushed straw in the growing period had more significant influence on the growth and development of winter wheat than the conventional fertilizer did, the average height was raised about 2.1 cm, and the heights of different varieties are different evidently under the same fertilizer. The factors of yield components, such as grain weight, grains per spike, and the effective spikes, were increased obviously under chemical fertilizer combined crushed straw, average yield was 7631.2 kg/hm2, 8.13% higher than that of the conventional fertilizer. Average water use efficiency of winter wheat was 2.033 kg/ hm2 owing to the use of chemical fertilizer combined crushed straw, 0.137 kg/m3 higher than that of the conventional fertilizer. According to the effects of the yield and water-saving, the yield and water use efficiency of "xinong9871", "zhongyuan 98-68" and "xiaoyan 22" were the highest under the chemical fertilizer combined crushed straw application.
Number of references:22
Main heading:Fertilizers
Controlled terms:Evaporation - Grain (agricultural product) - Phase transitions - Transpiration - Water conservation - Water supply
Uncontrolled terms:Average height - Average yield - Chemical fertilizers - Grain weights - Growing period - Growth and development - Water consumption - Water use efficiency - Water-saving - Wheat yield - Winter wheat - Yield - Yield components
Classification code:821.4 Agricultural Products - 804 Chemical Products Generally - 802.3 Chemical Operations - 801.4 Physical Chemistry - 643 Space Heating, Ventilation and Air Conditioning - 446.1 Water Supply Systems - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.z2.030
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735617Title:Effects of magnetization water on desalinization in cotton farmland of under-film dripping irrigation in XinJiang Province
Authors:Bu, Dongsheng (1); Feng, Wengui (1); Cai, Lihua (1); Zhou, Long (1)
Author affiliation:(1) Institute of Agricultural Sciences of the First Agricultural Division, Production and Construction Corps in XinJiang, Alar 843300, China
Corresponding author:Feng, W.
(nkshys@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:163-166
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A three-year experiment was conducted on the cotton growth and effect of decreasing soil salinity by using magnetization water for dripping irrigation under mulching plastic films. Results showed that magnetization water used in the experiment could reduce the soil salinity effectively, and promote the cotton growth and raise cotton yield and quality. At the 0-60 cm soil layer, magnetization water of dripping irrigation could decrease soil salinity rate about 20-30% purely. Simultaneously, the content of SO<inf>4</inf>2- and Cl- in the soil were also decreased evidently. Compared with ordinary water, magnetization water can increase ginned cotton by 144.7 kg/hm2, and raise income by 2025.8 yuan/hm2. So magnetization water dripping irrigation can increase the cotton production and income.
Number of references:19
Main heading:Soils
Controlled terms:Cotton - Magnetic devices - Magnetization - Plastic films - Protective coatings - Salinity measurement - Subirrigation
Uncontrolled terms:Cotton growth - Cotton production - Cotton yield - Drip irrigation - Soil layer - Soil salinity - Xinjiang
Classification code:821.3 Agricultural Methods - 817.1 Polymer Products - 813.2 Coating Materials - 821.4 Agricultural Products - 714.2 Semiconductor Devices and Integrated Circuits - 704 Electric Components and Equipment - 483.1 Soils and Soil Mechanics - 714 Electronic Components and Tubes
DOI:10.3969/j.issn.1002-6819.2010.z2.031
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735664Title:Preparation and structural performance of copolymer from konjac glucomannan graft acrylic acid and urea by 60CO-γ irradiation
Authors:Geng, Shengrong (1); Cheng, Qilai (2); Hua, Yuejin (3); Xiong, Guangquan (1); Cheng, Wei (1)
Author affiliation:(1) Institute for Farm Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (2) School of Pharmacy, Gannan Medical University, Ganzhou 341000, China; (3) College of Agriculture and Biotechnology, ZheJiang University, Hangzhou 310027, China
Corresponding author:Cheng, W.
(xucheng288@sohu.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:416-420
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Grafting acrylic acid (AA) and urea onto crude konjac glucomannana(KGM) by 60CO-γ irradiation to prepare a KGM-AA-urea copolymer and the structural performance was characterized by means of infrared spectroscopy(FTIR), transmission electron microscope(TEM), scanning electron microscopy(SEM) and difierential scanning calorimetry(DSC). The results showed that the optimum reaction mass of urea was 20% and the nitrogen content of product was 8.0%. The product had 146 times absorption of tip water. The free and bounder water content of fully swollen product was 99.73%. Structure analysis showed that the AA grafed with konjac, but urea not. The solid product forms dense network structure and with protuberance on the net surface, which comes from konjac-graft-AA and urea respectively. The product of the solution has two simultaneous microcosmic forms: netted and gelatinous structure.
Number of references:22
Main heading:Structural analysis
Controlled terms:Carboxylic acids - Copolymerization - Copolymers - Grafting (chemical) - Hydrogels - Infrared spectroscopy - Irradiation - Metabolism - Organic acids - Scanning electron microscopy - Transmission electron microscopy - Urea - Water absorption - Water content
Uncontrolled terms:Acrylic acids - Dense network structures - FTIR - Konjac glucomannan - Nitrogen content - Optimum reaction - Scanning calorimetry - SEM - Solid products - Structural performance - Structure analysis - Transmission electron microscope
Classification code:815.1 Polymeric Materials - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 815.2 Polymerization - 741.3 Optical Devices and Systems - 461.9 Biology - 444 Water Resources - 408.1 Structural Design, General - 741.1 Light/Optics
DOI:10.3969/j.issn.1002-6819.2010.z2.079
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735651Title:Comparison and analysis of gray model and regression model in basic prices appraisal of agricultural land
Authors:Liu, Yuechen (1); Wang, Qiubing (2); Qian, Fengkui (2); Feng, Rende (2); Liu, Hongbin (2)
Author affiliation:(1) Chinese Academy of Agriculture Engineering, Beijing 100125, China; (2) College of Land and Environment, Shenyang Agriculture University, Shenyang 110161, China
Corresponding author:Wang, Q.
(qiubingwangsy@sohu.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:344-348
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The basic prices of agricultural land appraisal to establish a complete set of agricultural land price system and smoothly carry out land assets, such as reasonable allocation of land consolidation rural land management has the extremely vital significance. The text is a research about the basic prices appraisal of agricultural land in Lingyuan city, Liaoning province. Based on the result of the agricultural land classifying, a grey model of the predicting about the agriculture land net-income and a basic regression model was set up. Furthermore, these two models were applied into evaluating and analyzing the basic prices of the agriculture land, combining with the income returning process. Both grey model and regression model for the basic prices of the agricultural land have scientific foundation. The results showed that compared with regression model, grey model was more efficient to reduce influence of the variation of net-come in different years, which could be greatly varied among different land uses and in different geographical conditions, on the basic prices. So grey model has more advantages in the basic prices of agricultural land appraisal.
Number of references:14
Main heading:Regression analysis
Controlled terms:Agriculture - Costs - Economic analysis - Land use
Uncontrolled terms:Agricultural land - Basic prices - Geographical conditions - Gray Model - Grey Model - Land managements - Liaoning Province - Regression model
Classification code:403 Urban and Regional Planning and Development - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 911 Cost and Value Engineering; Industrial Economics - 911.2 Industrial Economics - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2010.z2.065
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735652Title:Evaluation of rural residential land consolidation potential on southeast coast of China
Authors:Chen, Yating (1); Zhang, Chao (1); Yang, Jianyu (1); Shen, Lihong (1); Wang, Cong (1); Zhu, Dehai (1); Tian, Yufu (2)
Author affiliation:(1) College of Information and Electrical Engineering, China Agriculture University, Beijing 100083, China; (2) China Land Consolidation and Rehabilitation, Beijing 100035, China
Corresponding author:Zhang, C.
(zhangchao_bj@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:349-354
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The purpose of this paper is to provide foundation for the comprehensive land consolidation planning by studying the scientific evaluation method of the land consolidation potential (LCP). Based on the characteristics of rural residential areas on the southeast coast of China, an indicator system was built from five aspects to evaluate the land consolidation potential, from which a screening indicator and a overall control indicator were selected. An approach which made a combined use of screening method, multi-factors method and the overall control method were proposed. Then the result of evaluation was represented at three levels. Finally, the approach was verified by a case study of Gaoyou, Jiangsu Province. The approach which stresses the dominate action of important indicators can evaluate the LCP comprehensively and effectively. It can provide references for other LCP evaluation cases at city and county levels.
Number of references:12
Main heading:Rural areas
Controlled terms:Planning - Regional planning
Uncontrolled terms:Indicator system - Land consolidation - Method of potential evaluation - Residential land - The southeast coast of China
Classification code:403 Urban and Regional Planning and Development - 403.2 Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.z2.066
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735657Title:Measurement of myoglobin in pork meat by using steady spatially-resolved spectroscopy
Authors:Wen, Xing (1); Wang, Zhongyi (1); Huang, Lan (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Huang, L.
(biomed_hl@263.net)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:375-379
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The objective of this work was to determine the concentration of myoglobin in fresh pork meat and establish a fast non-invasive method using steady spatially-resolved spectroscopy (SRS). The concentration of myoglobin was calculated based on absorbance coefficients at 640, 760, 800, 850 nm. The results showed that the value of myoglobin using SRS was significantly correlated (r2=0.955) to traditional methods with the accuracy of 3.6%F.S. The results showed that the concentration of myoglobin can be measured by using near infrared steady spatially-resolved spectroscopy.
Number of references:14
Main heading:Spectrum analysis
Controlled terms:Infrared devices - Interferometry - Meats - Near infrared spectroscopy - Nondestructive examination
Uncontrolled terms:Absorbances - Myoglobin - Near Infrared - Non destructive - Steady spatially-resolved spectroscopy
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941.4 Optical Variables Measurements - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 822.3 Food Products - 741.3 Optical Devices and Systems - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2010.z2.071
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735628Title:Development of tomato chlorophyll content detector based on spectroscopy and ARM
Authors:Zou, Bing (1); Hou, Jialin (1); Li, Minzan (2)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian, 271000, China; (2) Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing, 100083, China
Corresponding author:Hou, J.
(jlhou@sdau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:223-227
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to detect tomato chlorophyll content convenient, simple and fast, based on spectral analysis technology, a new version of crop growth condition detector was developed, which is used to predict chlorophyll content of tomato leaf in the greenhouse. Two wavebands, 527 nm and 762 nm, were selected as characteristic wavelength used in the instrument. The instrument is consisted of a Y-type optic fiber, two silicon photocells, a signal processing unit and CPU. It has a friendly human-machine interface. According to the measured spectral reflectance, spectral spectrum coefficient of tomato leaf can be calculated. The spectral coefficient is used to predict chlorophyll content of tomato leaf in greenhouse. STM32F103RBT6, based on ARM Cortex-M3 kernel, was selected as the main processor of instrument to carry on digital converter, data processing, storage and so on. In addition, users have an option in saving data, either into a USB-memory stick, or into the computer or SD card through the interface. The performance test shows that the instrument has good flexibility and high accuracy. Furthermore, the instrument is easily operated with low-cost, high-precision, high application values.
Number of references:11
Main heading:Chlorophyll
Controlled terms:Data handling - Detectors - Fruits - Greenhouses - Interfaces (computer) - Man machine systems - Signal processing - Spectroscopy - Spectrum analysis
Uncontrolled terms:ARM technology - Chlorophyll contents - Crop growth condition - Digital converters - High application value - High-precision - Human Machine Interface - Instrumentation development - Optic fiber - Performance tests - Signal processing unit - Spectral analysis - Spectral coefficients - Spectral reflectances - Tomato leaf - Wavebands
Classification code:961 Systems Science - 914 Safety Engineering - 921 Mathematics - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 821.6 Farm Buildings and Other Structures - 801.2 Biochemistry - 801 Chemistry - 723.2 Data Processing and Image Processing - 722.2 Computer Peripheral Equipment - 716.1 Information Theory and Signal Processing - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.z2.042
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735595Title:Parameter identification of tomato 3D architectural model and simulation
Authors:Dong, Qiaoxue (1); Wang, Yiming (1); Yang, Lili (1); Yang, Weizhong (1); Shi, Qinglan (1); Xu, Yun (1)
Author affiliation:(1) College of Information and Electric Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Yang, L.
(llyang@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:38-42
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To reconstruct 3D plant shape of greenhouse tomato, this paper presented the developmental rule to simulate the morphological architecture of greenhouse tomato plant and its organs, and main model parameters were derived from the periodic measurement and stochastic analysis. In the model, the whole architecture of tomato plant was consisted of a main stem and lateral branches, whose growth was considered as a succession of nodes and internodes. For the kinetics of individual organs, binomial law was used to simulate the random number of different truss along the stem, and markov process was applied to generate classical leaf architecture, Meanwhile we used cantilever beam theory to model leaf inclination. The expansion of individual organs was simulated by using beta distribution law. With their geometrical definition by computer graphics tool, the model output more realistic 3D architecture of tomato plant, and fitted very well with real plant, which proved that above developmental rules were reliable to the architectural characteristics of tomato plant. This research will provide a convenient computer software tool for the quantitative description and visualization for the growth of tomato plant.
Number of references:13
Main heading:Three dimensional
Controlled terms:Computer architecture - Computer graphics - Fruits - Greenhouses - Markov processes - Random number generation - Stochastic models - Visualization
Uncontrolled terms:3D architectures - Architectural models - Beta distributions - Computer graphics tools - Greenhouse tomatoes - Leaf architecture - Model outputs - Model parameters - Morphological architecture - Parameter identification - Quantitative description - Random Numbers - Simulation - Stochastic analysis - Tomato - Tomato plants
Classification code:922.1 Probability Theory - 902.1 Engineering Graphics - 821.6 Farm Buildings and Other Structures - 922.2 Mathematical Statistics - 821.4 Agricultural Products - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment - 723.5 Computer Applications
DOI:10.3969/j.issn.1002-6819.2010.z2.008
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735611Title:Detecting model of electric shock signal based on wavelet analysis and BP neural network
Authors:Li, Chunlan (1); Su, Juan (1); Du, Songhuai (1); Xia, Yue (1); Zhang, Junjie (3); Zhang, Limiao (3)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) College of Mechanical and Traffic, Xinjiang Agricultural University, Urumqi 830052, China; (3) Henan Pingdingshan Electric Power Corporation, Pingdingshan 467000, China
Corresponding author:Du, S.
(songhuaidu@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:130-134
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:It is difficult to exactly detect and judge a weak electric shock signals in the summation leakage current on the low-voltage electric power grid. Integrating the merit of wavelet transform with that of BP neural network, a novel detection of the electric shock current based on wavelet transform and BP neural network was introduced in this paper. First of all, the animal electric shock signals was tested by physical experiment of electric shock, and an appropriate wavelet base and decompose scale was chosen to analysis the summation leakage current and the electric shock current. And then, the wave shape of specimens pretreated by wavelet transform was trained by BP neural network. A neural network coupling model of extracting electric shock current from the summation leakage current was built, and used to detect electric shock current of the untrained specimens. The average relative error between detected value and actual value was 3.93%. The result indicated that this method can detect electric shock current in the summation leakage current, and can be a reference for the development of new generation residual current operated devices.
Number of references:11
Main heading:Neural networks
Controlled terms:Electric accidents - Leakage currents - Signal detection - Wavelet analysis - Wavelet transforms
Uncontrolled terms:Average relative error - BP neural networks - Electric power grids - Electric shock - Low-voltage - Network coupling - Physical experiments - Residual current operated device - Residual current operated devices - Wave shape - Wavelet base
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 704 Electric Components and Equipment - 716.1 Information Theory and Signal Processing - 723.4 Artificial Intelligence - 921 Mathematics - 921.3 Mathematical Transformations
DOI:10.3969/j.issn.1002-6819.2010.z2.025
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111113736087Title:Effects of dielectric barrier discharge on ethylene degradation in fruit and vegetable storage
Authors:Ma, Tingjun (1); Shi, Xicheng (2); Bai, Shupei (2); Han, Suling (2); Sun, Wanqi (2)
Author affiliation:(1) Department of Food Science, Beijing Agricultural College, Beijing 102206, China; (2) Research Institute of Chemical Defense, Beijing 100191, China
Corresponding author:Ma, T.
(mtingjun@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:390-393
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The ethylene elimination is vital for the storage of fruit and vegetable. In this paper, a rod type dielectric barrier discharge (DBD) reactor was utilized to degrade ethylene. The parameters were investigated to evaluate the degradation effect, which included power consumption, flow rate, gap width, initial concentration and ozone content. Experimental results indicated that the highest ethylene removal efficiency could be achieved under the condition with the power of 15 W, the gas flow rate of 1.5 L/min and the gap width of 1 mm. The ozone generated in discharge could accelerate the ethylene degradation. But the ozone content could have a sharply increase when the power was higher than 20 W. The prospect of the application of non-thermal plasma is very bright in long-term storage of horticultural products.
Number of references:18
Main heading:Dielectric devices
Controlled terms:Degradation - Electric discharges - Ethylene - Flow control - Fruits - Ozone - Removal - Vegetables
Uncontrolled terms:Degradation effect - Dielectric barrier discharge reactors - Dielectric barrier discharges - Fresh-keeping - Fruit and vegetables - Gap widths - Gas flowrate - Horticultural products - Initial concentration - Long-term storage - Nonthermal plasma - Ozone content - Power Consumption - Removal efficiencies
Classification code:821.4 Agricultural Products - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 802.2 Chemical Reactions - 714 Electronic Components and Tubes - 704 Electric Components and Equipment - 701.1 Electricity: Basic Concepts and Phenomena - 631.1 Fluid Flow, General
DOI:10.3969/j.issn.1002-6819.2010.z2.074
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735594Title:Segmentation of color images of grape diseases using K_means clustering algorithm
Authors:Li, Guanlin (1); Ma, Zhanhong (1); Huang, Chong (1); Chi, Yongwei (2); Wang, Haiguang (1)
Author affiliation:(1) College of Agriculture and Biotechnology, China Agriculture University, Beijing 100193, China; (2) Yongning Protected Horticulture Research Institute, Yongning 750100, China
Corresponding author:Wang, H.
(wanghaiguang@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:32-37
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To improve the segmentation precision and effectiveness of plant disease images, a kind of unsupervised segmentation processing method based on K_means clustering (HCM) algorithm was proposed according to the properties of the symptoms and images of plant diseases. On the basis of the color differences of ab two-dimension data space from L*a*b* color space model, iterative color clustering of two clusters was conducted using squared Euclidian distance as the similarity distance and mean square deviation as the clustering criterion function. And the mathematics morphology algorithm was used to correct the clustering results. The proposed method was used to segment the color images of three kinds of grape diseases. The results show that it can satisfactorily segment the diseased regions from the color images of grape diseases with good robustness and good accuracy.
Number of references:13
Main heading:Clustering algorithms
Controlled terms:Color - Color image processing - Fruits - Image enhancement - Image segmentation - Mathematical morphology
Uncontrolled terms:Clustering criteria - Clustering results - Color clustering - Color difference - Color image segmentation - Color images - Color space - Euclidian distance - Grape diseases - K-means clustering - K-Means clustering algorithm - Mathematics morphology - Mean square deviation - Plant disease - Segmentation precision - Similarity - Similarity distance - Two-dimension - Unsupervised segmentation
Classification code:721 Computer Circuits and Logic Elements - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 821.4 Agricultural Products - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.z2.007
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735620Title:Development and application of soil moisture monitor system in Jilin Region
Authors:Yang, Weizhong (1); Wang, Yiming (1); Shi, Qinglan (1); Gao, Jing (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, Y.
(ym_wang@263.net)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:177-181
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The soil moisture monitoring system was developed for the sake of knowing the soil moisture in Jilin Region, Jilin province. The system was consisted of a sub-center, five information stations located in five main drought-resistant counties, and thirteen soil moisture monitoring stations distributed in the Region. Soil moisture monitoring stations acquire the raw data of soil moisture on time everyday, and transmit the data to the information stations, and then information stations exact the soil moisture from the raw data and transmit it to sub-center, the sub-center will make a drought prediction or alarm of the region by analyzing the soil moisture and make a drought-resistant blue print. The reliability and practicability of the system has been validated by running continuously over two years.
Number of references:17
Main heading:Moisture control
Controlled terms:Drought - Microwave measurement - Moisture determination - Monitoring - Soil moisture
Uncontrolled terms:GIS - Jilin Province - Management software - Monitor system - Soil moisture monitoring
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942.2 Electric Variables Measurements - 944.2 Moisture Measurements - 942 Electric and Electronic Measuring Instruments - 483.1 Soils and Soil Mechanics - 444 Water Resources - 941 Acoustical and Optical Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2010.z2.034
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735603Title:Forecasting model on rice blast based on BP neural network and chaos theory
Authors:Qiu, Jing (1); Wu, Ruiwu (2); Huang, Yanhong (3); Yang, Yi (2); Peng, Wanyun (4)
Author affiliation:(1) Teaching Affairs Office, Yunnan Agriculture University, Kunming 650201, China; (2) College of Foundation and Information Engineering, Yunnan Agriculture University, Kunming 650201, China; (3) College of Foreign Language, Yunnan Agriculture University, Kunming 650201, China; (4) College of Plant Protection, Yunnan Agriculture University, Kunming 650201, China
Corresponding author:Yang, Y.
(yyang66@126.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:88-93
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To foresee rice blast efficiently, a new forecasting model was established by integrating the chaos theory into the BP artificial neural network (ANN). The BP neural network was optimized by the QPSO algorithm. In this new model, the shortcoming that the BP network algorithm is easy to fall into local minimum value has been avoided. Based on the data of rice blast occurrences over the years in Fengqing County, Yunnan, China, the G-P algorithm was applied to study their K entropy and inserting space dimension. It was found that their values were all positive. So the rice blast occurrence has some chaos characteristics, and the number of model input layer can be determined. This model was used to make forecasts of rice blast in this county during 2001-2009, and was compared with other forecasting models. The results proved that the accuracy rate and convergence velocity of this model were higher than other forecasting models, and its forecasting results were also effective and believable. The new model can provide a new way to solve the problems, such as pattern recognition, classification, and forecasting of rice blast.
Number of references:16
Main heading:Chaos theory
Controlled terms:Backpropagation algorithms - Forecasting - Neural networks - Particle swarm optimization (PSO) - Pattern recognition
Uncontrolled terms:Accuracy rate - BP algorithm - BP artificial neural network - BP networks - BP neural networks - Chaos characteristics - Convergence velocity - Forecasting model of rice blast - Forecasting models - Local minimums - Model inputs - New model - Quantum-behaved particle swarm optimization (QPSO) - Rice blasts - Space dimensions - Yunnan , China
Classification code:716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 921 Mathematics - 922 Statistical Methods - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2010.z2.017
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735659Title:Acetyls removal from konjac glucomannan with potassium hydroxide
Authors:Meng, Junjie (1); Pan, Zhidong (1); Wang, Yanmin (1)
Author affiliation:(1) College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China; (2) Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, South China University of Technology, Guangzhou 510640, China
Corresponding author:Wang, Y.
(wangym@scut.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:385-389
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The removal of acetyls from konjac glucomannan (KGM) can modify the molecular structure via a molecular modification method by mechano-chemical treatment to increase the film performance of the KGM in engineering. The de-acetylation from the KGM was performed with potassium hydroxide (KOH) as a modifier through a mechano-chemical treatment in a high energy intensive vibrating mill. The results showed that the mechano-chemical treatment was an effective modification method to remove the acetyls from the KGM. The removal rate of acetyls from the KGM sample could be 90% when the KGM sample was treated by this effective mechano-chemical method for 30 min. The mass loss of de-acetylated KGM sample was lower than that of original sample. The de-acetylated KGM samples possessed a better swelling rate and a stability in water.
Number of references:18
Main heading:Chemical modification
Controlled terms:Acetylation - Glues - Gluing - Potassium - Potassium hydroxide - Viscosity
Uncontrolled terms:A-stability - De-acetylation - Film performance - High energy - Konjac glucomannan - Mass loss - Mechano-chemistry - Mechanochemicals - Modification methods - Molecular modification - Original sample - Removal rate - Swelling rates
Classification code:549.1 Alkali Metals - 631.1 Fluid Flow, General - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 818.5 Rubber Products
DOI:10.3969/j.issn.1002-6819.2010.z2.073
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735610Title:A method of short-term wind power forecast based on wavelet transform and neural network
Authors:Wang, Shiqian (1); Su, Juan (1); Du, Songhuai (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agriculture University, Beijing, 100083, China
Corresponding author:Su, J.
(sujuan@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:125-129
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With the increasing scale of grid connected wind forms, it is important to predict the wind power in order to ensure stability of the power system, and make a reasonable dispatching scheme, and improve the wind form competitiveness in generation market. A novel method was proposed and applied to forecast the short-term wind power in this paper. Wavelet transforms and neural networks were combined in this method. First, the history wind speed and history wind power was decomposed by multi-resolution analysis. Then, the general signals and detail signals of wind power were forecasted by neural networks separately, which introduced the general signals and detail signals of wind speed as the effect factors. Finally, the general wind power and detail wind power were reproduced to obtain the forecasting wind power. The validity and feasibility of the method were verified through the actual data from a wind farm in China.
Number of references:17
Main heading:Neural networks
Controlled terms:Competition - Electric utilities - Forecasting - Wavelet transforms - Wind effects - Wind power
Uncontrolled terms:Effect factors - Generation market - Grid-connected - Multi-resolutions - Novel methods - Power systems - Short-term forecast - Short-term wind power forecast - Wind farm - Wind speed
Classification code:921.3 Mathematical Transformations - 921 Mathematics - 911.2 Industrial Economics - 723.4 Artificial Intelligence - 706 Electric Transmission and Distribution - 615.8 Wind Power (Before 1993, use code 611 ) - 443.1 Atmospheric Properties
DOI:10.3969/j.issn.1002-6819.2010.z2.024
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735602Title:Forecasting soil parameters based on NIR and SVM
Authors:Zheng, Lihua (1); Li, Minzan (1); An, Xiaofei (1); Sun, Hong (1)
Author affiliation:(1) Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China
Corresponding author:Li, M.
(limz@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:81-87
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:By using SVM (Support Vector Machine) algorithm, the spectra of real-time soil samples were processed. Therefore the soil TN (Soil Total Nitrogen) and SOM (Soil Organic Matter) regression models were acquired and analysis on model accuracy which changed with the parameters of SVM was conducted. First, 150 soil samples were collected from the experimental field of China Agricultural University. Then the spectrum of each original soil sample was detected with the NIR (Near Infrared Reflectance) spectrograph. And the contents of TN and SOM in each sample were measured by using laboratory analysis methods. Finally, the regression models for TN and SOM were established based on SVM, and the evaluation about the extent was studied, which parameters of SVM could produce an effect on the predicting models. Research showed that it was befitting for the TN and SOM to established prediction models based on the whole spectra by using SVM. For soil TN, the calibration R<inf>2</inf> reached to 0.9224 and validation R<inf>2</inf> was 0.3667 based on the denoised spectra. For SOM, the calibration R<inf>2</inf> reached to 0.9179 and validation R<inf>2</inf> was 0.4152 based on the original NIR spectra. And the predicting accuracies for both TN model and SOM model were acceptable with low root-mean-square deviation of regression and validation.
Number of references:20
Main heading:Geologic models
Controlled terms:Agricultural machinery - Calibration - Forecasting - Gears - Infrared devices - Mathematical models - Nitrogen - Organic carbon - Regression analysis - Soil surveys - Soils - Spectrum analysis - Support vector machines
Uncontrolled terms:Laboratory analysis - Model accuracy - Near infrared reflectance - NIR spectrum - Predicting models - Prediction model - Regression model - Root-mean square deviation - Soil organic matters - Soil parameters - Soil sample - Soil total nitrogen - SVM(support vector machine)
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 821.1 Agricultural Machinery and Equipment - 921 Mathematics - 922.2 Mathematical Statistics - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 804.1 Organic Compounds - 741.3 Optical Devices and Systems - 723 Computer Software, Data Handling and Applications - 601.2 Machine Components - 483.1 Soils and Soil Mechanics - 481.1 Geology - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2010.z2.016
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735638Title:Treatment pattern of municipal solid wastes based on component and particle size
Authors:Zhang, Hongyu (1); Li, Guoxue (1); Wang, Guiqin (2)
Author affiliation:(1) College of Resource and Environment Science, China Agricultural University, Beijing 100193, China; (2) Beijing Environmental Sanitation Engineering Research Institute, Beijing 100028, China
Corresponding author:Li, G.
(ligx@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:274-280
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the distribution of kitchen waste and calorific capacity among different sized municipal solid waste, and determine the treatment patterns based on the size distribution, the mixed sample municipal solid waste from two transfer stations for southern urban area of Beijing was divided into nine groups according to different sizes: < 10, 10-< 20, 20-< 30, 30-< 40, 40-< 50, 50-< 60, 60-< 70, 70-80 and > 80 mm, their physical compositions were classified, and the relationship between physical composition, moisture content and calorific value were analyzed. The screening process, treatment technologies and final processing mode, which suitable for different size of properties, were determined based on fuzzy clustering analysis, and the difference of final destination of material compared was analyzed with the original screening process. The results indicated that moisture and kitchen waste content were significantly negatively correlated with calorific value, the plastic and paper content showed a significant positive correlation with caloric value. The best screening process was taken at the 40mm and 80mm screening. The municipal solid waste under 40mm sieved can be taken as the composting materials. The materials for 40-80 mm can be incinerated with 80 mm sieved material after increasing calorific value through bio-drying pretreatment. The incineration and compost can residue for landfill. Further destination of material of this model showed that there were 579 t/d municipal solid waste by composting, 441.9 t/d by bio-drying pretreatment, 1148.2 t/d by incineration, and 390.8 t/d for landfill. Under this treatment pattern, the resources treatment rate of municipal solid waste improved by more than 50%, compost production increased by 68.6%, and landfill capacity reduced by about 74.9% for southern urban area of Beijing. This research can provide a theoretical evidence for the selection of screening technique and treatment pattern of municipal solid waste in the future, and the idea and method can also be a reference for other regions.
Number of references:25
Main heading:Municipal solid waste
Controlled terms:Calorific value - Composting - Drying - Land fill - Materials - Moisture - Particle size - Waste disposal - Waste incineration - Waste treatment
Uncontrolled terms:Bio-drying - Caloric value - Compost production - Different sizes - Fuzzy clustering analysis - Kitchen waste - Landfill capacity - Mixed samples - Moisture contents - Physical composition - Positive correlations - Screening process - Screening techniques - Sieved materials - Treatment pattern - Treatment rate - Treatment technologies - Urban areas
Classification code:951 Materials Science - 943.2 Mechanical Variables Measurements - 801.4 Physical Chemistry - 642.1 Process Heating - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels - 452.4 Industrial Wastes Treatment and Disposal - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal
DOI:10.3969/j.issn.1002-6819.2010.z2.052
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735646Title:Analysis of potentialities and contribution rate of newly-increased cultivated land from land development and consolidation
Authors:Zhang, Shichao (1); Wei, Chaofu (1); Li, Ping (2)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing 400715, China; (2) Bureau of Land and Resources of Chongqing Province, Chongqing 400015, China
Corresponding author:Wei, C.
(weicf@swu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:312-319
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Potential analysis of newly-increased cultivated land becomes an increasingly important part of the feasibility research for the spatial-temporal allocation of land development and consolidation project and quantity-quality balance of land requisition-compensation. Based on the perspective of newly-increased cultivated land on unit area, in this paper, potentialities of the newly-increased cultivated land from cultivated land consolidation, rural residential consolidation, unutilized land development and land reclamation were calculated by the method of conversion in accordance with grade, respectively. The various potential rank zones of newly-increased cultivated land on unit area were identified by hierarchical clustering method. Moreover, the contribution rate of the newly-increased cultivated land from land development and consolidation was studied. Results indicated that there were significant regional differences of newly-increased cultivated land on unit area from the four different types of land development and consolidation in Chongqing, in which cultivated land consolidation the northeast of low, medium mountains areas and the southeast of medium mountainous areas, rural residential consolidation the western of mountain and hilly areas, unutilized land development the western of mountain and hilly areas and the central of parallel to the ridge valley hilly areas, and land reclamation the western of mountain and hilly areas also with the northeast of low, medium mountains areas and the southeast of medium mountainous areas. Not only can the newly-increased cultivated land on unit area calculated by the method of conversion in accordance with grade closely link the quantity and quality of the newly-increased cultivated land to the grade distribution of the occupied cultivated land in Chongqing, but also can weak the influence of the total areas of land development and consolidation in different county on the real potential analysis of newly-increased cultivated land. Therefore, the results can provide scientific instruction for the spatial-temporal allocation of land development and consolidation project to make regional cultivated land requisition-compensation balance possible.
Number of references:17
Main heading:Land reclamation
Controlled terms:Land use - Landforms - Planning - Regional planning - Zoning
Uncontrolled terms:Chongqing - Chongqing cities - Consolidation projects - Contribution rate - Conversion in accordance with grade - Cultivated lands - Hierarchical clustering methods - Hilly areas - Land development - Mountainous area - Potential analysis - Spatial temporals
Classification code:403 Urban and Regional Planning and Development - 403.2 Regional Planning and Development - 442.2 Land Reclamation - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2010.z2.060
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735590Title:Cotton image segmentation method for online foreign fiber inspection
Authors:Kan, Daohong (1); Li, Daoliang (1); Yang, Wenzhu (1); Zhang, Xin (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Kan, D.
(kandaohong@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:11-15
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Image segmentation is a key technology for foreign fiber inspection in cotton based on machine vision. The image of cotton containing foreign fiber has a feature of that the background (cotton fiber) is homogeneous and has a normal gray-level distribution; the object (foreign fiber) is smaller, darker than the background but its gray-level distributes in a wide range. In this paper, a Background Estimation Thresholding(BET) method was presented to segment the objects from such kind of cotton images. Three typical kinds of cotton images were selected for the use of experiments and compared with Otsu method. BET method obtained better segmentation results than the Otsu's and was implemented fast, which consumed only 8.46s for 1 million times of segmentation. The experimental results show that the BET is effective and fast, and can be used in the online foreign fiber inspection in volumes of cotton.
Number of references:9
Main heading:Image segmentation
Controlled terms:Computer vision - Cotton - Cotton fibers - Fibers - Imaging systems - Inspection - Normal distribution
Uncontrolled terms:Background estimation - BET method - Foreign fiber - Gray-level - Key technologies - On-machines - Otsu method - Segmentation methods - Segmentation results - Thresholding
Classification code:922.1 Probability Theory - 913.3.1 Inspection - 819.1 Natural Fibers - 817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 746 Imaging Techniques - 741 Light, Optics and Optical Devices
DOI:10.3969/j.issn.1002-6819.2010.z2.003
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735601Title:Detection of vegetation light use efficiency based on chlorophyll fluorescence spectrum
Authors:Cheng, Zhanhui (1); Liu, Liangyun (1)
Author affiliation:(1) Center for Earth Observation and Digital Earth, Chinese Academy of Sciences, Beijing 100190, China; (2) College of Information and Electrical Engineering, China Agriculture University, Beijing 100083, China
Corresponding author:Liu, L.
(lyliu@ceode.ac.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:74-80
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, a new method was presented to detect LUE based on the remotely sensed chlorophyll fluorescence (ChlF) signals. A diurnal change experiment was carried out to acquire the vegetation photosynthesis, canopy spectra and chlorophyll fluorescence parameters. The solar-induced chlorophyll fluorescence signals were separated from the canopy spectra at 688 and 760 nm based on the Fraunhofer Line Depth algorithm. The LUE model (fluo-LUE) was established based on the ChlF signals at the two oxygen absorption bands, and it was also compared with the LUE model (PRI-LUE) based on photochemical reflectance index (PRI). The result showed that LUE was highly significantly correlated with the PSII (photosystemII) Yield of quantum efficiency(φ<inf>PSII</inf>) (R2=0.802), which proved the possibility to detect LUE based on the remotely sensed ChlF signals. And LUE was significantly correlated with the ChlF signals at 688 and 760 nm. Compared with PRI-LUE model (R2=0.646), the correlation coefficient of fluo-LUE model was more significant (R2=0.799). Therefore, Chlf Signals could track the diurnal changes of LUE much better than the PRI. These research results show the solar-induced Chl signals might provide a prospective method for detecting LUE.
Number of references:37
Main heading:Signal detection
Controlled terms:Absorption spectra - Chlorophyll - Fluorescence - Interferometry - Oxygen - Reflection - Remote sensing - Spectrum analysis - Vegetation
Uncontrolled terms:Canopy spectrum - Chlorophyll fluorescence - Chlorophyll fluorescence parameters - Correlation coefficient - Diurnal changes - Fraunhofer lines - Light use efficiency - Oxygen absorption - Photochemical reflectance index - Photosystem-II - Research results
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941.4 Optical Variables Measurements - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 741.1 Light/Optics - 731.1 Control Systems - 716.1 Information Theory and Signal Processing - 804.1 Organic Compounds
DOI:10.3969/j.issn.1002-6819.2010.z2.015
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735639Title:Influence of glucose substrate on microbial activity of photosynthetic bacteria in process of hydrogen production
Authors:Du, Jinyu (1); Wang, Yi (1); Zhao, Minshan (1); Guo, Qianhui (1); Zhang, Quanguo (1)
Author affiliation:(1) College of Mechanical and Electronical Engineering, Henan Agricultural University, Zhengzhou 450002, China
Corresponding author:Zhang, Q.
(zquanguo@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:281-284
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Research on microbial activity of photosynthetic bacteria in the process of hydrogen production plays an important role in revealing the nature of hydrogen production and increasing the efficiency of hydrogen production by photosynthetic bacteria. The effects of glucose as carbon substrate on microbial activity of photosynthetic bacteria were researched in this paper, the cause of cell growth activity decline and the influence of glucose on the absorption spectra of photosynthetic bacteria were also analyzed. It showed that in the process of photosynthetic bacteria utilizing glucose to produce hydrogen, glucose was metabolized into organic acid which leads to pH value decreased, and the cell growth activity was inhibited by low pH value. There was no hydrogen produced When the added concentration of glucose below 3 mmol/L, however, it was apparent that the characteristic peaks of absorption spectra and the micrpbial activity was promoted by substrate. When the concentration of glucose was added up to 30 mmol/L, the hydrogen production activity increased significantly, but the characteristic peaks of absorption spectra decreased obviously, and the growth activity was inhibited by substrate. photosynthetic bacteria utilized glucose as substrate to produce hydrogen, the best added concentration of glucose was 180 mmol/L.
Number of references:15
Main heading:Substrates
Controlled terms:Absorption - Absorption spectra - Bacteria - Bacteriology - Cell growth - Glucose - Growth kinetics - Hydrogen production - Light absorption - Organic acids - pH
Uncontrolled terms:Carbon substrates - Cell growth activity - Characteristic peaks - Growth activity - In-process - Microbial activities - pH value - Photo-bacteria - Photosynthetic bacterias
Classification code:461 Bioengineering and Biology - 522 Gas Fuels - 741.1 Light/Optics - 801 Chemistry - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2010.z2.053
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735593Title:Apple recognition method based on illumination invariant graph
Authors:Tu, Jun (1); Liu, Chengliang (1); Li, Yanming (1); Zhou, Jun (2); Yuan, Jin (1)
Author affiliation:(1) School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; (2) College of Engineering, Nanjing Agricultural Uiversity, Nanjing 210095, China
Corresponding author:Tu, J.
(roke@sjtu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:26-31
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To solve the problem that the recognition accuracy of apple-picking robots is unstable under varying illumination conditions, a novel method based on illumination invariant graph was proposed for apple recognition. Firstly, the algorithm of medium filtering was used for the pre-process of apple image. Then the illumination invariant graph was calculated to eliminate the influence of illumination change. Finally, Ostu method was used for recognizing apple fruit. The experiment result illustrated that the stability of recognition accuracy of the method based on illumination invariant graph was three times of the method without illumination invariant graph under four kinds of illumination conditions, and the average recognition accuracy was up to 90.45%. The apple recognition method based on illumination invariant graph can overcome the negative effects brought by illumination change and improve the fruit recognition technology in outdoor environment.
Number of references:18
Main heading:Fruits
Controlled terms:Image processing - Imaging systems - Robots
Uncontrolled terms:Apple fruits - Fruit recognition - Illumination changes - Illumination conditions - Illumination invariant - Novel methods - Ostu method - Outdoor environment - Picking - Picking robot - Recognition accuracy - Recognition methods
Classification code:731.5 Robotics - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.z2.006
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735615Title:Development tendency of residual current protection technology and device in China
Authors:Xia, Yue (1); Du, Songhuai (1); Li, Chunlan (1); Su, Juan (1); Zhang, Junjie (3); Zhang, Limiao (3)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) College of Mechanical and Traffic, Xinjiang Agricultural University, Urumqi 830052, China; (3) Henan Pingdingshan Electric Power Corporation, Pingdingshan 467000, China
Corresponding author:Du, S.
(songhuaidu@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:151-155
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The basic principles of residual current protection devices were introduced in this paper. The working principles , operation characteristics and application status of new residual current protection were also analyzed. Based on that, influencing factors of correct operating rate of residual current protection device were anatomized, and improvement of residual current protection device were suggested.
Number of references:30
Main heading:Equipment
Controlled terms:Electric current measurement - Electric power supplies to apparatus
Uncontrolled terms:Dead-area - Malfunction - Operation characteristics - Residual current device - Working principles
Classification code:715.2 Industrial Electronic Equipment - 901 Engineering Profession - 942.2 Electric Variables Measurements
DOI:10.3969/j.issn.1002-6819.2010.z2.029
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735645Title:Risk assessment of snow disaster on county scale
Authors:Chen, Yanqing (1); Yang, Jianyu (1); Su, Wei (1); Zhang, Xiaodong (1); Huang, Jianxi (1); Su, Xiaohui (1); Yan, Tailai (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Yang, J.
(ycjyyang@yahoo.com.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:307-311
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The snow disaster is a meteorological disaster caused by multi-role factors. So far, there is no unified standard for snow risk assessment. Combining theories and views about meteorology, physical geography, disaster science, grassland science and many other subjects, the study applied Analytical Hierarchy Process (AHP) to establish index system and evaluation model of risk assessment about snow disaster under the existing and recognized formation mechanism of risk. With the evaluation model, the snow risk evaluation on county scale was condncted in China. The results show that it can provide a guidance for disaster prevention and reduction.
Number of references:10
Main heading:Risk assessment
Controlled terms:Disaster prevention - Hierarchical systems - Rating - Snow
Uncontrolled terms:Analytical hierarchy process - County scale - Evaluation models - Formation mechanism - Index systems - Risk evaluation - Snow disaster
Classification code:443.3 Precipitation - 902.2 Codes and Standards - 914.1 Accidents and Accident Prevention - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2010.z2.059
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735619Title:Effects on soil temperature change and watermelon wilt control of irrigation and plastic mulching at hot season
Authors:Qian, Jianrui (1); Wang, Guoliang (2); Zeng, Lihong (1)
Author affiliation:(1) Agricultural Science Research Institute, Ningbo 315101, China; (2) College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
Corresponding author:Wang, G.
(wglzjwl@zwu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:172-176
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The characteristics of soil solarization and efficiency against watermelon wilt (Fusarium oxysporum f.sp. niveum), with different colors, different layers of plastic mulching and irrigation were investigated inside greenhouses during 2004 and 2005 at hot season in Ningbo, China. The results showed that the irrigation and plastic mulching treatment could significantly add the soil temperature at 5, 10, 15 and 20 cm depths and increase 10~15°C compared with the CK(un-mulched). It was also found that warming effect of bilayer transparent mulching was the best and monolayer transparent mulching was followed. After mulching 10 d by the monolayer transparent membrane, soil temperature at 5~20 cm depths could be maintained above 40°C throughout the day. Watermelon wilt test showed that the control effect of the first crop of continuous cropping watermelon wilt covered by the monolayer transparent membrane more than 25 d was 100% and the anti-efficiency of the second crop covered by same membrane was also more than 84.5%. The laboratory test showed that the death time of Fusariurn oxysporurn f. sp. niveum in watermelon roots was 4 d in 41°C and 1 d in 43°C. Therefore, it is very effective to control the presence of watermelon wilt by monolayer plastic mulching at hot season in Southern China.
Number of references:15
Main heading:Heating
Controlled terms:Crops - Irrigation - Monolayers - Soils - Solar heating - Temperature
Uncontrolled terms:Bi-layer - Continuous cropping - Fusarium oxysporums - Hot season - Laboratory test - Plastic mulching - Soil solarization - Soil temperature - Southern China - Watermelon wilt
Classification code:483.1 Soils and Soil Mechanics - 641.1 Thermodynamics - 643.1 Space Heating - 813.2 Coating Materials - 821.3 Agricultural Methods - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.z2.033
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735654Title:Fractal geometry of rural residential areas in Pingyi County Mountains and impact factors
Authors:Che, Mingliang (1); Nie, Yimin (1); Jiang, Shuqian (1); Zhang, Jianhua (1); Duan, Ruijun (2); Zhao, Mei (1)
Author affiliation:(1) College of Resource and Environment, Shandong Agricultural University, Tai'an 271018, China; (2) Land Bureau of Pingyi County, Pingyi 273300, China
Corresponding author:Nie, Y.
(ymnie@sdau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:360-365
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The fractal properties are worth studying in the evolution of self-organization theory on rural residential areas. In this paper, taking Pingyi County Mountains in Shandong Province as a study area, the relationships were showed between influencing factors of location changes and fractal dimension values in rural residential areas by using fractal geometry, and the fractal properties of rural residential areas were demonstrated at last. It is concluded that: 1) The rural residential area, perimeter, population and fractal dimension are connected to each other. 2) The fractal dimension value of rural residential areas in Pingyi County Mountains decreases with elevation changes and slope increasing. 3) The fractal dimension value of rural residential areas is obviously higher than traffic dimension and water dimension. 4) The relation of rural population and rural residential area is allometry. The relative variation ratio of rural population is lower than the area variation ratio of rural residential areas, and the fractal dimension value of rural residential areas will increase in future. 5) With peasants' net income growing, the fractal dimension of rural residential areas is rising, and its border sinuosity is lowering progressively and its form is turning regularization gradually. The paper can provide an academic basis for the rural residential land consolidation in practice.
Number of references:20
Main heading:Fractal dimension
Controlled terms:Landforms - Partial discharges - Planning - Regional planning - Rural areas
Uncontrolled terms:Fractal geometry - Fractal properties - Fractal-dimension value - Impact factor - Influencing factor - Land consolidation - Net incomes - Pingyi County Mountains - Residental land - Residential areas - Rural population - Self-organizations - Shandong province - Study areas
Classification code:403 Urban and Regional Planning and Development - 403.2 Regional Planning and Development - 481.1 Geology - 701.1 Electricity: Basic Concepts and Phenomena - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.z2.068
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735629Title:Control system of target spraying robot in greenhouse
Authors:Cao, Zhengyong (1); Zhang, Junxiong (1); Geng, Changxing (1); Li, Wei (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Li, W.
(gxy5@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:228-233
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the effective utilization of pesticide spraying, reduce pesticide residues and chemical pollution, a control system of target spraying robot in greenhouse was developed based on the host computer IPC and the lower computer PLC. This system has two operating modes, manual and automatic mode, which can control the mobile platform and manipulator, locate the plant diseases, open and close solenoid valve on each spray nozzle of the pole individually, implement target spraying on the cucumber leaves precisely in a square area of 0.2 m × 0.2 m. Test results show that the system can work stably, and has relatively high positioning accuracy and availability.
Number of references:15
Main heading:Spray nozzles
Controlled terms:Agriculture - Computer control systems - Disease control - Greenhouses - Pesticides - Pollution control - Robots - Solenoid valves
Uncontrolled terms:Automatic mode - Chemical pollution - Host computers - Mobile platform - Operating modes - Pesticide residue - Pesticide spraying - Plant disease - Positioning accuracy - Precision Agriculture - Test results - Variable nozzle
Classification code:821.6 Farm Buildings and Other Structures - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 803 Chemical Agents and Basic Industrial Chemicals - 731.5 Robotics - 731.1 Control Systems - 631.1 Fluid Flow, General - 619 Pipes, Tanks and Accessories; Plant Engineering Generally - 461.7 Health Care - 454.2 Environmental Impact and Protection
DOI:10.3969/j.issn.1002-6819.2010.z2.043
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735642Title:Image-based light environment distribution in greenhouse
Authors:Dong, Qiaoxue (1); Wang, Yiming (1); Shi, Qinglan (1); Yang, Weizhong (1); Yang, Lili (1); Feng, Lei (1); Xu, Yun (1)
Author affiliation:(1) College of Information and Electric Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Shi, Q.
(ql.shi@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:294-297
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Light is a key environmental factor for crop growth. However the study on light environment in greenhouse has been a difficulty for the researchers because of effects of complex factors from greenhouse structure, orientation, greenhouse glazing and so on. This paper presented an image-based method to investigate the light distribution in real greenhouse by using the computer vision technology. The method was described in detail which including creating a high dynamic range(HDRI), recovering light information from HDRI image, and getting the radiance map of greenhouse light distribution. This radiance map can reflect the distribution of light intensity at different moment and different orientation for one day as well as under different weather case, which can obtain a better fitting result against natural light environment. This research work will not only provide a novel method to obtain complex light distribution, but also provide a more accurate illumination model for incident radiation of crop canopy.
Number of references:8
Main heading:Greenhouses
Controlled terms:Computer vision - Crops - Engineering research - Imaging systems - Plants (botany)
Uncontrolled terms:Complex factors - Computer vision technology - Crop canopy - Crop growth - Environmental factors - Fitting results - Greenhouse light - Greenhouse structure - High dynamic range - Illumination models - Image-based - Image-based methods - Incident radiation - Light distribution - Light environment - Light intensity - Natural light - Novel methods - Radiance map
Classification code:901.3 Engineering Research - 821.6 Farm Buildings and Other Structures - 821.4 Agricultural Products - 746 Imaging Techniques - 741.2 Vision - 741 Light, Optics and Optical Devices - 461.9 Biology
DOI:10.3969/j.issn.1002-6819.2010.z2.056
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735632Title:Hydrokinetic numerical simulation for sucking performance of reciprocating pump
Authors:Zhang, Manlai (1); Liao, Ruiquan (1); Feng, Jin (1)
Author affiliation:(1) CNPC Key Laboratory of Oil and Gas Production, Yangtze University, Jing Zhou, HuBei; 434023, China
Corresponding author:Zhang, M.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:242-247
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to investigate the sucking performance of reciprocating pump and influence of working parameters, the sucking process of pump was simulated on the basis of Computational Fluid Dynamics. For determining the moving law of suction valve, the Adolph movement equation of reciprocating pump valve was solved with the transient inner flow field in pump, and relevant dynamic meshes were created or suspended according to the movement of piston and valve at different crank angle. Through numerical simulation, the sucking performance of reciprocating pump about transient flux, pressure contour on piston was analyzed, and the influence of stroke frequency, spring stiffness on delay-closing of suction valve was investigated. The simulation results showed that transient flux declined and absorptive capacity was 0.91 times of theoretical value for liquid compressibility and inertia. Besides, suction valve delay-closing angle increased 5.4° and delay-closing displacement increased 2.3 mm when stroke frequency raised form 100 to 330/min. The study provides a method for the liquid-solid coupling simulation of sucking performance by building the computed model adapted to the motion of piston and valve. It is useful for investigating sucking performance of reciprocating pump and optimizing the reciprocating pump.
Number of references:16
Main heading:Computer simulation
Controlled terms:Computational fluid dynamics - Liquids - Numerical analysis - Reciprocating pumps - Stiffness
Uncontrolled terms:Absorptive capacity - Closing angle - Coupling simulation - Crank angle - Delay-closing - Dynamic mesh - Inner flow field - Liquid solids - Movement equations - Numerical simulation - Pressure contours - Simulation result - Spring stiffness - Suction valves - Theoretical values - Transient fluxes - Working parameters
Classification code:951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 921.6 Numerical Methods - 723.5 Computer Applications - 618.2 Pumps - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2010.z2.046
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735640Title:Modeling of environmental parameters in greenhouse with linear time-invariant system theory
Authors:Yang, Weizhong (1); Wang, Yiming (1); Dong, Qiaoxue (1); Zhang, Xiaotao (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, Y.
(ym_wang@263.net)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:285-289
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to reduce the massive consumption of water and energy on greenhouse environmental control in summer. The environmental model is needed for precisely control of temperature and humidity. In the paper an Auto-Regression (ARX) model of indoor temperature and humidity under forced ventilation in summer was established by utilization of system identification technology. The model has 8 input parameters: the indoor/outdoor temperature and humidity, the outdoor solar radiation intensity, the outdoors instantaneous wind rate, the state of the forced ventilation system(on or off) and time readings within a 24-hour cycle. All data was acquired with one minute interval from June to July in 2003. The data was divided into two sets: one is identification set, which was used to identify the models, another is confirmation set which was used to verify the models. Model parameters were identified by least square method. The model was verified by the indices of maximum absolute error(MAE), maximum relative error(MRE), RMSE and variance accounted for (vaf). The confirmation showed that the MAE of the temperature models was 3.57°C, RMSE was less than 0.198°C; the MAE of the humidity models was 7.3%, RMSE was less than 0.624%; the vaf of models was up to 98.9%. The Models have higher precision in general, whereas the predicted error of the models is large a little bit at several samples, and can satisfy the demand of greenhouse environmental control.
Number of references:17
Main heading:Environmental impact assessments
Controlled terms:Environmental impact - Greenhouses - Humidity control - Identification (control systems) - Invariance - Least squares approximations - Linear systems - Sun - Time varying control systems - Ventilation
Uncontrolled terms:Auto-regression - Environmental control - Environmental model - Environmental parameter - Forced ventilation - Indoor temperature - Indoor/outdoor - Input parameter - Least square methods - Linear time invariant system - Linear time invariant systems - Maximum absolute error - Maximum relative errors - Model parameters - Predicted error - Solar radiation intensity - System identifications - Temperature models - Water and energies
Classification code:921.6 Numerical Methods - 731.1 Control Systems - 657.2 Extraterrestrial Physics and Stellar Phenomena - 643.5 Ventilation - 454.2 Environmental Impact and Protection - 402.1 Industrial and Agricultural Buildings - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2010.z2.054
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735607Title:Development of a movable farm-data acquisition system with PDA and GPS
Authors:Che, Yanshuang (1); Li, Minzan (1); Zheng, Lihua (1); Deng, Xiaolei (1)
Author affiliation:(1) Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China
Corresponding author:Li, M.
(limz@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:109-114
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:It is the basic need for carrying out precision agriculture to acquire the farmland information in real-time. A movable farm-data acquisition system was developed based on PDA and GIS technology in the paper. By using GIS technology, the system could collect and manage the information of the farmland geography location and the field parameters such as soil moisture, soil EC, soil temperature, and environment moisture. It integrated the ZigBee coordinator module, GPS-OEM module, GPRS module, and embedded GIS module as a whole mobile intelligent farming solution. ZigBee module was used for coordinating and managing the field wireless sensors network and collecting the farmland information through the network. GPS module was used for collecting and managing the geographic location information of each sampling point and collecting the boundary geographic information of the target sampling field. GPRS module was used for the remote communicating and transferring the farmland information between the system and the host PC. The movable farm-data acquisition system could be used to collect the farmland information in real-time. It could manage the several of information of the farming fields effectively. It was proved that the movable farm-data acquisition system based on the ZigBee wireless sensors network and GIS was convenient and practical for collecting and managing the farming information.
Number of references:24
Main heading:Personal digital assistants
Controlled terms:Farms - Geographic information systems - Global positioning system - Navigation systems - Sensors - Soil moisture - Technology transfer - Wireless networks
Uncontrolled terms:Data acquisition system - Embedded GIS - Farmland information collection - Field parameters - Geographic information - Geographic location - GIS technology - GPRS module - Host-PC - Precision agriculture - Sampling points - Soil EC - Soil temperature - Wireless sensors networks - Zig-Bee - Zigbee coordinators - Zigbee wireless network
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 801 Chemistry - 723.3 Database Systems - 911.2 Industrial Economics - 722 Computer Systems and Equipment - 483.1 Soils and Soil Mechanics - 434.4 Waterway Navigation - 716.3 Radio Systems and Equipment
DOI:10.3969/j.issn.1002-6819.2010.z2.021
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735660Title:Influences of preserved preparations on salted eggs under pulsed pressure
Authors:Wang, Xiaotuo (1); Gao, Zhenjiang (1); Wang, Yawei (1); Lou, Zheng (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Gao, Z.
(zjgao@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:394-398
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this study, pulsed pressure for pickling eggs was adopted to enrich varieties of salted eggs, to improve the flavor of salted eggs and to enhance the pickling rate. Liquor, spices and citric acid were selected as influencing factors. And the optimal technology of spices on the salted eggs under pulsed pressure was confirmed by single factor experiment and the orthogonal test, which was investigated by the variation of the weight-increasing ratio(WIR), salt content of egg white(EWSC) as well as egg yolk(EYSC) during the pickling process. The results showed that liquor and citric acid could promote the infiltration of salt, but spices hinder it. The successive order of factors affecting comprehensive score was spices, liquor and citric acid. Significant difference was found respectively in spices for comprehensive score and citric acid for EWSC. The optimum conditions of pickling flavor salted eggs under high-pressure 140 kPa, the ratio between high-pressure holding time and atmospheric-pressure holding time(HATR) 2.5 min/5 min and salt saturated solution 96 h were obtained as follows: liquor 2%, spices for the Formula 1(aniseed 0.25%, pepper 0.125%, fennel 0.05%, cloves 0.05%), citric acid 0.05%.
Number of references:15
Main heading:Citric acid
Controlled terms:Agricultural products - Pickling
Uncontrolled terms:Egg white - Egg yolks - Influencing factor - Optimal technology - Optimum conditions - Orthogonal test - Pressure holding - Pulsation - Salt content - Salted egg - Saturated solutions - Storage
Classification code:539 Metals Corrosion and Protection; Metal Plating - 821.4 Agricultural Products - 822 Food Technology
DOI:10.3969/j.issn.1002-6819.2010.z2.075
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735643Title:Development of intensive aquaculture distributed control system
Authors:Liu, Tao (1); Du, Shangfeng (1); Dou, Nan (1)
Author affiliation:(1) College of Information and Electrical Engineering, Agricultural University, Beijing 100083, China; (2) Key Laboratory of Modern Precision Agriculture System Integration Ministry of Education, Beijing 100083, China
Corresponding author:Du, S.
(du_grad_stud@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:298-301
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to the conditions of poor control equipment and low reliability in China's aquaculture, the paper presented a distributed control system with high cost-effective. The each functional unit has a microcontroller. Each module was designed with different hardware to achieve the corresponding functions and RS-485 bus module was used for communication. The system can display in real-time with LCD for various water quality parameters and let operator real data easily. The experiment show that the distributed control system(DCS) is reliable and obviously to reduce the fluctuation of dissolved oxygen. The dissolved oxygen content of pond can be increased by 1mg/L with the DCS.
Number of references:9
Main heading:Distributed parameter networks
Controlled terms:Aquaculture - Control theory - Controllers - Digital control systems - Dissolved oxygen - Distributed parameter control systems - Liquid crystal displays - Water pollution - Water quality
Uncontrolled terms:Digital control - Dissolved oxygen contents - Distributed Control System - Distributed control system(DCS) - Distributed control systems - Functional units - High costs - RS-485 bus - Water quality parameters
Classification code:741.3 Optical Devices and Systems - 732.1 Control Equipment - 731.1 Control Systems - 703.1 Electric Networks - 821.3 Agricultural Methods - 453.2 Water Pollution Control - 445.2 Water Analysis - 445 Water Treatment - 444 Water Resources - 453 Water Pollution
DOI:10.3969/j.issn.1002-6819.2010.z2.057
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735630Title:Control system of eight claw intra-row mechanical weeding device based on LabVIEW
Authors:Chen, Shuren (1); Zhang, Pengju (1); Yin, Dongfu (1); Mao, Hanping (1)
Author affiliation:(1) Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Chen, S.
(srchen@ujs.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:234-237
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The control system of eight claw intra-row mechanical weeding device was designed based on LabVIEW. The system utilized the distance between shovel teeth and plants as a threshold to remove weeds. In order to verify the effect of weeding, an experiment was carried out in laboratory. By analyzing the experimental data of Eight-hoe weeding device, it is proved that it can meet the requirements of weed and avoiding to injure crops. The mechanical weeding device with the control system could reduce the injury rate of crops to within 10% and make the coverage rate of plant spacing up to 50% while the plant spacing was more than 0.3m. And it is also found the factors that damage seedlings are related to trolley displacement error, electromagnetic devices operate time, the initial position of shovel teeth.
Number of references:10
Main heading:Weed control
Controlled terms:Agricultural machinery - Control theory - Crops - Electromagnets - Equipment - Shovels
Uncontrolled terms:Coverage rate - Displacement errors - Electromagnetic devices - Experimental data - Initial position - Injury rate - Introa-row weeding - LabViEW - Mechanical weeding - Plant spacing - Weeding device
Classification code:901 Engineering Profession - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 803 Chemical Agents and Basic Industrial Chemicals - 731.1 Control Systems - 704.1 Electric Components - 405.1 Construction Equipment
DOI:10.3969/j.issn.1002-6819.2010.z2.044
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735665Title:Application and performance of acrylate copolymer compatibilizer in wood-plastics composites
Authors:Zhao, Jianying (1); Ou, Yinggang (1); Cai, Hongzhen (2); Gao, Qiaochun (2); Zhao, Lianyun (2); Huang, Zhaohe (2)
Author affiliation:(1) College of Engineering, South China Agricultural University, Guangzhou 510642, China; (2) College of Chemical Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author:Ou, Y.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:421-424
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, the acrylate and the double band silane were copolymerized by radical polymerization methods to prepare the compatibilizer in wood-plastic composites(WPC). Mechanical properties of the composites were tested, such as tensile properties by universal material testing machine and impact property by impacting testing machine. The result showed that the mechanical properties of the composites would be better when the compatibilizer was added in WPC, the compatibilizer molecule could not only bond with the plant fiber, but also be compatible with plastic. The GMA monomer was introduced in the copolymer, the epoxy groups in GMA could be opened loop by the amino groups in silane or the hydroxyl group in the fiber, and the cross-linking structure and the stable microcosmic dispersions system was formed between the plant fiber, compatibilizer and the plastic. The compatibilizer reduced fiber polarity, increased dispersion and compatibility with the plastics. The tensile strength was 16.5 MPa and the impact strength of WPC was 19.1 KJ/m2.
Number of references:20
Main heading:Mechanical properties
Controlled terms:Agricultural machinery - Agricultural wastes - Composite materials - Copolymerization - Copolymers - Dispersions - Elastomers - Impact strength - Materials testing apparatus - Polyethylenes - Tensile strength - Tensile testing - Textile fibers - Thermoplastics
Uncontrolled terms:Acrylate - Acrylate copolymers - Amino group - Cross-linking structures - Epoxy group - Hydroxyl groups - Impact property - Material testing - Opened loop - Organic silicon - Plant fibers - Radical polymerization - Testing machine - Wood-plastic composites - Wood-plastics composite
Classification code:951 Materials Science - 821.5 Agricultural Wastes - 821.1 Agricultural Machinery and Equipment - 819.2 Synthetic Fibers - 818.2 Elastomers - 815 Polymers and Polymer Science - 811 Cellulose, Paper and Wood Products - 422.2 Strength of Building Materials : Test Methods - 422.1 Strength of Building Materials : Test Equipment - 421 Strength of Building Materials; Mechanical Properties - 415 Metals, Plastics, Wood and Other Structural Materials
DOI:10.3969/j.issn.1002-6819.2010.z2.080
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735622Title:Effects of ridge and furrow rainwater harvesting system with gravel mulch on growth of sea buckthorn
Authors:Ma, Yujun (1); Li, Xiaoyan (1); Yi, Wanjuan (2); Cui, Buli (2); Li, Yuetan (2)
Author affiliation:(1) State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China; (2) College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China
Corresponding author:Ma, Y.
(myj3648@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:188-194
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to understand the role of ridge and furrow rainwater harvesting (RFRH) system with gravel mulch for the eco-environmental projection and recovery in the cold and semi-arid areas of high plateau, a field study was conducted to investigate the effect of RFRH system with gravel mulch on the growth of sea buckthorn in Lake Qinghai Watershed. It showed that the average runoff efficiency was 62%, 33%, 23% for the plastic-covered ridge (narrow), uncovered ridge (narrow) and flat land after the runoff was produced at the experimental site in 2009, respectively. The survival rate of sea buckthorn for RFRH system with gravel mulch was 49%, 27% higher than the flat land, while it was also higher for narrow ridge (59%) than for wide ridge (40%) in the same conditions. In the contrary, the survival rate of sea buckthorn for plastic-covered ridge and gravel-covered furrow was low. Compared with the flat land, RFRH system with gravel mulch could accelerate the growth of sea buckthorn significantly, but too much water in the furrow may restrain the growth of sea buckthorn, in the case of wide ridge with gravel mulch in a wet year. Because of the interaction between the interception loss of precipitation and soil moisture conservation by mulch, the effect of RFRH system with gravel mulch on leaf water potential was not obvious during light rainfall events. In summary, RFRH system with gravel mulch could accelerate the survival and growth of sea buckthorn, but it is essential to determine appropriate measures of RFRH system based on the precipitation properties and vegetation water requirements.
Number of references:35
Main heading:Rain
Controlled terms:Arid regions - Gravel - Harvesting - Lakes - Landforms - Moisture control - Runoff - Soil conservation - Soil moisture - Water conservation - Watersheds
Uncontrolled terms:Field studies - Gravel mulch - Interception loss - Leaf water potential - Moisture conservation - Precipitation properties - Rain water harvesting - Rainfall - Rainfall event - Rainwater harvesting system - Ridge and furrow - Ridge and furrow rainwater harvesting (RFRH) - Sea buckthorn - Semiarid area - Survival and growth - Survival rate - System-based - Water requirements
Classification code:821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 481.1 Geology - 944.2 Moisture Measurements - 444.1 Surface Water - 443.3 Precipitation - 443 Meteorology - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.z2.036
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735625Title:Identification of alfalfa seedling salt tolerance by near infrared reflectance spectroscopy
Authors:Jiang, Jian (1); Yang, Baoling (1); Xia, Tong (2); Yu, Shumei (2); Wu, Yunna (1)
Author affiliation:(1) Collge of Life Science, Dalian Nationalities University, Dalian 116600, China; (2) Livestock Science Branch, Jilin Academy of Agricultural Science, Gongzhuling 136100, China
Corresponding author:Jiang, J.
(jjx@dlnu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:207-211
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Rapid identification of alfalfa seedling salt tolerance has important signification for salt-tolerant germplasms screening and salt-tolerant new varieties breeding. Proline and MDA are two important biochemical indicators of plant salt tolerance. Near infrared spectroscopy calibrations of proline and MDA in the seedling of 40 different alfalfa varieties were studied by means of partial least-squares (PLS) regression in the paper. The calibrations for fresh and dried samples of alfalfa seedling were analyzed by near infrared diffuse reflectance spectroscopy (NIDRS). Good calibrations of NIDRS were found for proline and MDA, the correlation coefficients of calibration (R2) and correlation coefficients of validation (r2) were all greater than 0.85, and the ratio of performance to standard deviation (RPD)value of proline and MDA for fresh and dried samples were 1.72, 2.04 and 2.38, 3.97. The results of flesh samples and dried samples were not evident (P > 0.05). The verification results of seedling salt tolerance in 12 alfalfa cultivars show that the proline and MDA model of near infrared spectroscopy can rapidly and accurately be used to identify seedling salt tolerance of alfalfa.
Number of references:24
Main heading:Amino acids
Controlled terms:Agricultural products - Calibration - Infrared devices - Near infrared spectroscopy - Plants (botany) - Reflection
Uncontrolled terms:Alfalfa - MDA - Near infrared diffuse reflectance spectroscopy (NIDRS) - Proline - Seedling salt tolerance
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 821.4 Agricultural Products - 741.3 Optical Devices and Systems - 711 Electromagnetic Waves - 461.9 Biology - 461 Bioengineering and Biology
DOI:10.3969/j.issn.1002-6819.2010.z2.039
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735636Title:Moving characteristics for mixture of ceramic balls and biomass chars in incline tube
Authors:Yang, Yanqiang (1); Yi, Weiming (2); Li, Zhihe (2); Bai, Xueyuan (2); Li, Yongjun (2); Cui, Xibin (2)
Author affiliation:(1) School of Engineering, Shenyang Agricultural University, Shenyang 110161, China; (2) School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author:Yi, W.
(yiweiming@sdut.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:264-268
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the velocity distributions of the mixture flow for ceramic balls and biomass chars in incline tube reactor, the flowing characteristics of mixture in incline tube were measured by using particle image velocimetry (PIV), and different quality ratios (10:1, 20:1, 30:1, 32:1, 40:1, 50:1 and 60:1) of ceramic balls with diameter 1mm to biomass chars were used in the experiments. The experimental results showed that the mixed flow was composed of three phases, which were disordered flow (0~590 mm), transition flow (500~590 mm) and steady flow (≥ 590 mm) respectively. In the steady flow phase, the axial velocity increased when the ratio of ceramic balls to biomass chars increased. At different sections and different mixing ratios, the axial velocity distributions were similar and the radial velocities were all less than 0.2 m/s. The results can provide theoretic references for the study of heat transfer law of the mixture flow of ceramic balls and biomass chars in incline tube.
Number of references:16
Main heading:Ceramic materials
Controlled terms:Biological materials - Biomass - Heat transfer - Mixtures - Motion estimation - Spheres - Steady flow - Tubes (components) - Velocity - Velocity control - Velocity distribution - Velocity measurement
Uncontrolled terms:Axial velocity - Axial-velocity distribution - Biomass char - Ceramic balls - Heat transfer laws - Mixed flows - Mixing ratios - Mixture flow - Particle image velocimetries - PIV - Radial velocity - Three phasis - Tube reactors - Tubes
Classification code:943.3 Special Purpose Instruments - 731.3 Specific Variables Control - 802.3 Chemical Operations - 812.1 Ceramics - 931.1 Mechanics - 931.3 Atomic and Molecular Physics - 943.2 Mechanical Variables Measurements - 716.1 Information Theory and Signal Processing - 631.1 Fluid Flow, General - 631 Fluid Flow - 616.1 Heat Exchange Equipment and Components - 525.1 Energy Resources and Renewable Energy Issues - 461.2 Biological Materials and Tissue Engineering - 641.2 Heat Transfer
DOI:10.3969/j.issn.1002-6819.2010.z2.050
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735612Title:On-load automatic capacity regulating distribution transformer and its dynamic benefit analysis
Authors:Wang, Dongdong (1); Piao, Zailin (1); Zhao, Liye (1); Zheng, Yu (1)
Author affiliation:(1) College of Information and Electric Engineering, Shenyang Agricultural University, Shenyang, 110866, China
Corresponding author:Piao, Z.
(piaozl@china.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:135-140
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To verify the effectiveness of its energy conservation of on-load automatic capacity regulating distribution transformer and the mechanism of solving transformer running in "oversized power". According to the measured dynamic day and month load data, the daily load curve and monthly load curve is plated. Then the dynamic power consumption of SZ<inf>11</inf>-M-T on-load automatic capacity regulating distribution transformer and S<inf>11</inf> distrbution transformer is calculated and the comprehensive economic benefit is comparised too. The results show that the effective way to avoid transformer running in "oversized power" is to use on-load automatic capacity regulating distribution transformer for aera whose power consumption significantly different from peak to valley, region whose peak and valley loads frequently rotate and rural aeras whose power consumption is seasonal concentration. Energy conservation of on-load automatic capacity regulating distribution transformer is obivously profitable.
Number of references:15
Main heading:Dynamic analysis
Controlled terms:Energy conservation - Landforms - Profitability
Uncontrolled terms:Benefit analysis - Daily load curve - Distribution transformer - Dynamic power loss - On-load automatic capacity regulating
Classification code:422.2 Strength of Building Materials : Test Methods - 481.1 Geology - 525.2 Energy Conservation - 911.2 Industrial Economics
DOI:10.3969/j.issn.1002-6819.2010.z2.026
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735613Title:Development of RTK-GPS receiver system and comparison of VRS differential modes
Authors:Cao, Mingang (1); Zhang, Man (1); Ma, Wenqiang (1); Liu, Gang (1)
Author affiliation:(1) Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China
Corresponding author:Zhang, M.
(cauzm@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:141-145
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to meet the requirements of high accuracy position in precision agriculture, the GPS Receiver system based on VRS differential was developed by using RTK-GPS OEM board and CDMA wireless communication module. RTCM/CMR data format and GPRS/CDMA wireless transform mode of VRS differential data were analyzed and compared. The experiment results showed, the VRS differential data have good reliability and stability; the CDMA wireless transform mode has less delay than GPRS mode, but the communication cost was higher than GPRS mode. Based on an overall consideration of cost and accuracy, different wireless transform mode can be used.
Number of references:10
Main heading:Global positioning system
Controlled terms:Agriculture - Code division multiple access - Kinematics - Metadata - Wireless telecommunication systems
Uncontrolled terms:CDMA - Position systems - Precision agriculture - Real time kinematic-global position system(RTK-GPS) - Virtual reference systems
Classification code:716 Telecommunication; Radar, Radio and Television - 716.3 Radio Systems and Equipment - 717 Optical Communication - 723 Computer Software, Data Handling and Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2010.z2.027
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735608Title:Design of ARM-based wireless data transmission system of pig farm
Authors:Zhou, Xiuli (1); Cheng, Xue (2); Li, Yanjun (1); Zhao, Wenying (1)
Author affiliation:(1) Engineering College, Northeast Agricultural University, Harbin 150030, China; (2) Shanxi Aero Electric company Limited, Xianyang 713100, China
Corresponding author:Zhou, X.
(xlzhou0451@gmail.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:115-119
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to meet the requirements of data Transmission in management of pig farm, an ARM-based wireless transmission system of pig farm data was designed in this paper. The transmission terminal is an embedded wireless system that consisted of MC55 modem and S3C2410 processor which is the core of system. Wireless data transmission terminal hardware and software based on embedded Linux operating system and GPRS wireless data transmission technology were designed, and the software of data center server was put forward in detail. The experiment results showed that the data interaction between terminal and server was achieved by the system, and data transmission was reliable. Combined with RFID technology, the system can achieve animal ID transmission in real-time with good accurate.
Number of references:16
Main heading:Information management
Controlled terms:Computer operating systems - Data communication systems - Design - Embedded software - Farms - Modems - Systems analysis - Telecommunication equipment - Transmissions
Uncontrolled terms:ARM - MC55 - Pig Farm - S3C2410 - System design - Wireless transmission system
Classification code:903.2 Information Dissemination - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723 Computer Software, Data Handling and Applications - 718.1 Telephone Systems and Equipment - 961 Systems Science - 718 Telephone Systems and Related Technologies; Line Communications - 716 Telecommunication; Radar, Radio and Television - 602.2 Mechanical Transmissions - 408 Structural Design - 717 Optical Communication
DOI:10.3969/j.issn.1002-6819.2010.z2.022
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735649Title:Analysis on arable land intensity difference at plot scale in Jingji plain
Authors:Kong, Xiangbin (1); Li, Cuizhen (2); Wang, Hongyu (1); Ma, Song (1); Jiao, Jinsheng (1); Li, Tao (1); Zhang, Qingpu (1); Li, Jing (1)
Author affiliation:(1) Department of Land Resource Science, China Agricultural University, Beijing 100193, China; (2) School of Public Administration, Zhejiang Gongshang University, Hangzhou 310018, China
Corresponding author:Kong, X.
(kxb@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:331-337
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to analyze the difference of arable land use intensity at plot level, Daxing in Beijing and Quzhou in Hebei province, which located in Jingji plain, were taken as comparative study areas in the paper. On the basis of farm household survey data at the plots level with GPS positioning on the whole county, the two areas were compared by arable land use intensity both in monetary and physical form. The results showed that: the economic development level was one of the most important factor impacting on the arable land use intensity, and the capital intensity for arable land use at plot level in Daxing was higher than that in Quzhou, which was 9797.30 yuan/ha on average in Daxing, and 5025.18 yuan/ha in Quzhou. From the composition of the arable land use intensity in monetary form, the arable land use labor intensity took a great share of the total, which the percentage was 67.03% on average in Daxing, and above 70% in Quzhou, while taking in the cost of the family labor in agriculture production. The arable land intensity in physical form showed that fertilizer input amount per ha in Daxing was greater than that in Quzhou, and farmers in Daxing had paid more attention to organic fertilizer adopt. The arable land use intensity at plot level in Daxing had much more spatial and temporal divergence than that in Quzhou, which showed that there were larger individual differences in land use behaviors between Daxing and Quzhou. The spatial variation of the arable land use intensity at pot level mainly came from the diversification of farm household land use objectives, which indicated that we should put emphasis on the spatial variation of farm household land use intensity to understand the driving force of the arable land in the future.
Number of references:21
Main heading:Land use
Controlled terms:Economics - Farms - Fertilizers - Landforms - Surveys
Uncontrolled terms:Arable land - Jingji plain - Monetary form - Physical form - Plot level
Classification code:403 Urban and Regional Planning and Development - 405.3 Surveying - 481.1 Geology - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.z2.11.063
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735618Title:Iterative calculation for contracted depth of horseshoe tunnel cross-section
Authors:Liu, Jiliang (1); Wang, Zhengzhong (1); Zhao, Yanfeng (1)
Author affiliation:(1) Research Center of Water Engineering Safety and Disaster Prevention, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) College of Science, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Wang, Z.
(wangzz0910@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:167-171
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to obtain the appropriate formulas for computing contracted depth of horseshoe cross-section tunnel, appropriate dimensionless parameters were introduced and mathematical transformation was made for energy equation for contracted cross-section of horseshoe cross-section tunnel. Then iterative formulas were developed for computing contracted depth for all types of horseshoe cross-sections. Critical discharges were defined and derived to determine the range of contracted depth. Numerical calculation example indicates that the iterative formulas for computing contracted depth are simple and available.
Number of references:15
Main heading:Iterative methods
Controlled terms:Hydraulics - Mathematical transformations
Uncontrolled terms:Contracted depth - Dimensionless parameters - Energy equation - Horseshoe cross-section - Iterative calculation - Iterative formulas - Numerical calculation - Tunnel cross-section
Classification code:632.1 Hydraulics - 921.3 Mathematical Transformations - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2010.z2.032
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735650Title:Benefits assessment of land consolidation projects based on lattice order theory
Authors:Zhao, Wei (1)
Author affiliation:(1) College of Land Management, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Zhao, W.
(zhaow@mail.hzau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:338-343
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This paper was aimed to solve the connectivity absence of evaluation objects attribution. Lattice-order theory was employed to develop a framework to assess economic, social and ecological environment benefits of land consolidation projects. In the proposed model, lattice order structure was applied to reflect the preference level and Hausdorff measure was used to calculate the generalized distance from evaluation objects to their virtual boundary. The assessment result is one kind linear extension of lattice order structure under the effect of decision-maker preference relation. A case study of several typical land consolidation projects in Hubei Province was carried out to evaluate the selected attribute index, which were cropland area increased per 104 RMB, invest per area, invest per increased cropland area, labor productivity increasing, food production capacity increasing, annual net income increasing per capita, green vegetation area increasing, and forest protection area. Moreover, the assessment result was verified by attributes reduction approach, which demonstrated the availability of the advised model.
Number of references:15
Main heading:Rating
Controlled terms:Decision making - Land use - Productivity
Uncontrolled terms:Assessment - Attributes reduction - Benefits - Consolidation projects - Decision makers - Ecological environments - Food production - Forest protection - Hausdorff measures - Hubei Province - Labor productivity - Lattice order - Lattice orders - Linear extensions - Net incomes - Order theory - Per capita - Preference level - Preference relation - Virtual boundary
Classification code:403 Urban and Regional Planning and Development - 902.2 Codes and Standards - 912.2 Management - 913.1 Production Engineering
DOI:10.3969/j.issn.1002-6819.2010.z2.064
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735614Title:Research on optimized voltage pattern and economic power supply radius of rural grid
Authors:Gu, Yujia (1); Xu, Yuejin (1); Yin, Zhi (1)
Author affiliation:(1) College of Information and Electric Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Xu, Y.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:146-150
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With the development of rural electrification, electricity load and consumption of rural power network are increasing. The current voltage pattern can not meet the demand, and how to select better voltage pattern programs become an urgent problem to be solved. Based on rational design of the network structure model, and through calculations of the economic parameters and the cost on the grid, a constrained nonlinear programming model was established, which the objective function is to minimize annual cost of unit power supply area and optimization variable is the power supply radius. Economic comparison between different voltage pattern programs were conducted using the objective value optimized by this model. The results show that voltage pattern of rural power network in our country should be simplified in the future, and medium distribution voltage should be developed to 20 kV and 35 kV, and power supply radius of rural power grid should be adjusted according to the reference values of economic power supply radius.
Number of references:10
Main heading:Constrained optimization
Controlled terms:Costs - Electric network analysis - Electric utilities - Mathematical models - Nonlinear programming - Rational functions - Rural areas
Uncontrolled terms:Annual cost - Economic comparison - Optimization model - Power supply radius - Voltage pattern
Classification code:961 Systems Science - 922 Statistical Methods - 921 Mathematics - 911 Cost and Value Engineering; Industrial Economics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 706 Electric Transmission and Distribution - 703.1.1 Electric Network Analysis
DOI:10.3969/j.issn.1002-6819.2010.z2.028
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20111013735644Title:Spatial autocorrelation of three nature disasters in China
Authors:Wang, Zhen (3); Zhang, Xiaodong (1); Su, Wei (1); Yang, Siquan (2); Liu, Sanchao (2)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) Office of China National Committee for Disaster Reduction, Beijing 100083, China; (3) Department of Survey Engineering, East China Institute of Technology, Fuzhou 344000, China
Corresponding author:Su, W.
(suwei7963@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 2
Issue date:December 2010
Publication year:2010
Pages:302-306
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:China is a country which is strongly struck by disasters, and three natural disasters occurr frequently and distribute widely. Studying their spatial distribution and spatial aggregation is significant to disaster prevention, reduction and relief supplies configuration. The spatial distribution and aggregation of disasters can be showed by spatial autocorrelation analysis on the three natural disasters. In this paper, the spatial distribution of the three natural disasters were got from epicenter distribution map, fault zone distribution map, snow and ice disasters frequency map and flooding frequency map. The spatial autocorrelation distribution maps were got from spatial autocorrelation analysis on the spatial distribution of the three natural disasters. The res