<RECORD 1>
Accession number:20120914822963
Title:Regional winter wheat yield forecasting based on assimilation of remote sensing data and crop growth model with Ensemble Kalman method
Authors:Huang, Jianxi (1); Wu, Sijie (2); Liu, Xingquan (2); Ma, Guannan (1); Ma, Hongyuan (1); Wu, Wenbin (3); Zou, Jinqiu (3)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) School of Geosciences and Information-Physics, Central South University, Changsha 410083, China; (3) Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Corresponding author:Huang, J.(jxhuang@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:142-148
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:Regional crop production prediction is a significant component of national food security assessment. Remote sensing has the advantage of acquiring soil surface and crop canopy radiation information, however it is hard to reveal the inherence mechanism of crop growth and yield formation. Crop growth models based on the crop photosynthesis, transpiration, respiration, nutrition are successfully applicable for yield forecasting in simple point scale, however, they are hampered by the deriving of regional crop key input parameters. Data assimilation method which combines crop growth model and remotely sensed data has been proved the most potential approach in regional yield estimation. Hengshui district was taken as the study area. Based on the calibration and regional of WOFOST, the WOFOST model had been used to express the characteristic of time series LAI in crop growth season. To solve the system errors of MODIS-LAI due to the mixed pixels effect, the corrected MODIS-LAI was implemented by combining the field measured LAI data and the MODIS-LAI temporal trend information. Time-series LAI was assimilated through combined corrected MODIS-LAI and WOFOST simulated LAI from green-up to heading stage with EnKF algorithm. The assimilated optimal LAI was used to drive the WOFOST model per-pixel to estimate the regional yield. The results indicated that the precision of yield forecasting was obviously improved with EnKF assimilation, compared with the statistical yield, the coefficient of determination was improved from 0.10 to 0.45 and RMSE was reduced from 2480 kg/hm<sup>2</sup> to 860 kg/hm<sup>2</sup>. The results showed that assimilation of the remotely sensed data into crop growth model with EnKF can provide a reliable approach for prediction regional crop yield and had great potential in agricultural applications. The research can provide an important reference value for the regional crop production estimation.
Number of references:21
Main heading:Crops
Controlled terms:Cultivation - Data processing - Estimation - Food supply - Forecasting - Forestry - Models - Pixels - Radiometers - Remote sensing
Uncontrolled terms:Coefficient of determination - Crop canopy - Crop growth - Crop growth and yields - Crop growth model - Crop production - Crop yield - Data assimilation - Data assimilation methods - Data transformation - EnKF - Green-up - Key input - Mixed pixel - National Foods - Reference values - Remote sensing data - Remotely sensed data - Soil surfaces - Study areas - System errors - Temporal trends - Winter wheat - Yield estimation - Yield forecasting
Classification code:921 Mathematics - 902.1 Engineering Graphics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 944.7 Radiation Measuring Instruments - 731.1 Control Systems - 723.2 Data Processing and Image Processing - 404.2 Civil Defense - 723.5 Computer Applications
DOI:10.3969/j.issn.1002-6819.2012.04.023
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 2>
Accession number:20120914822979
Title:Analysis on cultivated land fragmentation and spatial agglomeration pattern in Jiaxing city
Authors:Chen, Hongyu (1); Zhu, Daolin (1); Yun, Wenju (2); Yang, Li (1); Tang, Huizhi (2); Tang, Changchun (3)
Author affiliation:(1) Department of Land Resources Management, China Agricultural University, Beijing 100193, China; (2) Centre of Land Consolidation, Ministry of Land and Resource, Beijing 100035, China; (3) School of Civil Engineering and Architecture, Changsha University of Science and Technology, Changsha 410004, China
Corresponding author:Zhu, D.(dlzhu@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:235-242
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 understand the spatial agglomeration pattern of cultivated land fragmentation and social-economic in a certain region, indices of cultivated land fragmentation were calculated on the basis of land use data. Spatial patterns of cultivated land patch indices of area, dispersion and shape in Jiaxing city were assessed. The spatial autocorrelation indicated that the accumulation order of three land fragmentation indices in Jiaxing city was patch area index per unit > patch dispersion index per unit > patch shape index per unit; in addition, the total area in H-H (high spatial autocorrelations) and L-L (low spatial autocorrelations) type accounted for over 80% of Jiaxing city. The high accumulation region with patch area index was located at Tongxiang and Haining in the West of Jiaxing; the high accumulation region with patch dispersion index was located at Pinghu, Nanhu and Haiyan in the East; the high accumulation region with patch shape index was located at Pinghu and Jiashan on the East. It also indicated that there were best spatial correlations among patch area index, patch dispersion index and rural residential dispersion. It is very useful for spatial optimization of regional cultivated land protection and rural land consolidation as well as promotion of land-use efficiency.
Number of references:24
Main heading:Land use
Controlled terms:Agglomeration - Autocorrelation - Dispersions - Forestry - Rural areas
Uncontrolled terms:Cultivated lands - Jiaxing city - Land fragmentation - Social-economic - Spatial agglomeration pattern
Classification code:951 Materials Science - 922 Statistical Methods - 921 Mathematics - 821.0 Woodlands and Forestry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 802.3 Chemical Operations - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2012.04.039
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 3>
Accession number:20120914822981
Title:Design and performance test of high hydrostatic pressure equipment for food processing
Authors:Yi, Jianyong (1); Wang, Huanyu (4); Zhang, Yan (1); Liao, Xiaojun (1); Hu, Xiaosong (1)
Author affiliation:(1) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (2) Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Beijing 100083, China; (3) National Engineering Research Centre for Fruit and Vegetable Processing, Beijing 100083, China; (4) Baotou KeFa High Pressure Technology Limited Company, Baotou 014030, China
Corresponding author:Hu, X.(huxiaos@263.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:248-253
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 stability and efficiency of high pressure equipment, and promote the industrialization of high pressure technology in food production, the design principle of commercial high hydrostatic pressure equipment for food processing, and its structural characteristics and major technical difficulties were proposed. The structure and the optimum parameters of two-way high pressure intensifier, vessel plug, direct-pushing sealing system and large high pressure processing chamber were studied. The total chamber volume of the equipment was 400 L with 100 L of one chamber. The maximum working pressure was 600 MPa and the processing capacity was 1.68 t/h. The results of performance test showed that the system proposed had advantages of steady performance, easy operation and reliable security. Results provide the technical basis for the design and manufacture of large-scale commercial high pressure equipment.
Number of references:14
Main heading:Food processing
Controlled terms:Convergence of numerical methods - Functions - Hydrostatic pressure
Uncontrolled terms:Design Principles - Food production - High hydrostatic pressure - High pressure equipment - High pressure intensifiers - High pressure processing - High pressure technology - Optimum parameters - Performance tests - Processing capacities - Sealing system - Steady performance - Structural characteristics - Technical difficulties - Working pressures
Classification code:631.1.1 Liquid Dynamics - 822.2 Food Processing Operations - 921 Mathematics - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2012.04.041
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 4>
Accession number:20120914822954
Title:Analysis of nitrate-nitrogen loss under different underground pipe layout
Authors:Zeng, Wenzhi (1); Huang, Jiesheng (1); Xie, Hua (1); Wu, Mousong (1); Peng, Zhenyang (1); Xu, Chi (1)
Author affiliation:(1) State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
Corresponding author:Huang, J.(jshuanga@public.wh.hb.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:89-93
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:In order to simulate the law of nitrogen loss under different weir depths, drainage spaces and drainage depths in underground pipes, field experiment was conducted and nitrogen loss was simulated by DRAINMOD 6.0. The ranges for three factors were set to be 30-80 cm, 8-40 m, and 80-120 cm respectively, and the values of three experimental parameters in each simulation were determined with the method of General Rotation Design. The results indicated that the amount of nitrogen loss in drainage tended to be larger as the weir depth or the drainage depth increased, or the drainage space decreased alone. The effects of drainage space and drainage depth on nitrogen loss were greater than those of weir depth. The weir depth was less than 40 cm, drainage depth had greater influence on nitrogen loss than drainage space, and there was an opposite result when the weir depth was deeper than 70 cm. If the drainage depth was the same, the effective way to reduce the nitrogen loss in drainage was to expand the drainage space and decrease the weir depth at the same time.
Number of references:21
Main heading:Weirs
Controlled terms:Computer simulation - Hydraulic structures - Models - Nitrogen - Numerical methods
Uncontrolled terms:Drainage depth - DRAINMOD - Experimental parameters - Field experiment - Nitrate nitrogen - Nitrogen loss - Underground pipes
Classification code:921.6 Numerical Methods - 902.1 Engineering Graphics - 804 Chemical Products Generally - 723.5 Computer Applications - 611 Hydroelectric and Tidal Power Plants - 441.1 Dams - 441 Dams and Reservoirs; Hydro Development
DOI:10.3969/j.issn.1002-6819.2012.04.014
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 5>
Accession number:20120914822968
Title:Real-time detection system for LAI of fruiter overlapped leaves based on virtual instruments
Authors:Wu, Weibin (1); Hong, Tiansheng (1); Zhu, Yuqing (1); Dai, Fen (1); Li, Dongdong (1); Zhang, Lijun (1)
Author affiliation:(1) Key Laboratory of Key Technology for South Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China; (2) Mechanical Laboratory of China Agriculture Research System, Guangzhou 510642, China; (3) 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:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:169-174
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:At present, distinguishing overlapped leaves is the difficulty of measuring LAI (leaf area index). In this paper, a new method for the detection of LAI of overlapped leaves was proposed. The citrus leaves were put under the direct parallel light and the photoelectric sensor was used to measure the transmitted light energy. The output voltage signal of the sensor was sent into the computer through the data acquisition card. Then, the amount of overlapped layers was determined automatically by LabVIEW software programming. The amount of overlapped layers multiplied by the area of the sensor receiver was the area of the leaves. The total area of the leaves was the cumulative leaf area in the whole testing process and the LAI could be calculated. According to the experimental results, near-infrared was chosen as the photosource and a near-infrared photoelectric sensor was designed. The short circuit current I<inf>1</inf> and I<inf>2</inf> had a good linear relationship with the preamplifiers output voltage U<inf>1</inf> and the main output voltage U<inf>2</inf>. The significant level of R<sup>2</sup> was p < 0.05. The data acquisition experimental results showed that the absolute value of the maximum relative error between the value of LAI calculated by this platform and the real value of LAI obtained by grid method was 14.8%, in the mode of manual scanning. Moreover, the LAI with distant leaves was tested in preliminary stage showing a power function with the leaf distance significantly.
Number of references:16
Main heading:Sensors
Controlled terms:Computer programming languages - Data acquisition - Digital instruments - Infrared devices - Optical variables measurement - Photoelectricity - Plants (botany) - Testing
Uncontrolled terms:Absolute values - Citrus leaves - Data acquisition cards - Grid methods - LabVIEW software - Leaf area - Leaf Area Index - Linear relationships - Maximum relative errors - Near Infrared - Output voltage signals - Output voltages - Overlapped leaves - Parallel light - Photoelectric sensors - Power functions - Real values - Real-time detection - Testing process - Transmitted light - Virtual instrument
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 - 801 Chemistry - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 741.3 Optical Devices and Systems - 723.2 Data Processing and Image Processing - 723.1.1 Computer Programming Languages - 461.9 Biology - 423.2 Non Mechanical Properties of Building Materials: Test Methods - 741.1 Light/Optics
DOI:10.3969/j.issn.1002-6819.2012.04.028
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 6>
Accession number:20120914822974
Title:Plan design for investigation and assessment of biomass energy resources in Jiangsu province
Authors:Wang, Xiaohua (1)
Author affiliation:(1) College of Technology, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:Wang, X.(xhwang@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:204-207
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 energy is in urgent current need and it is going to play an important role in future energy system. The employment of biomass energy reduces the need for fossil fuels and is more environmental friendly. A biomass energy resource survey, evaluation program and technical line were developed in Jiangsu province. The combining method of the census of resource method, the household energy consumption sample survey and the main biomass resources special investigation were put forward. The resource survey and farmers sampling survey scheme were set. The biomass energy resource evaluation, supply and demand balance analysis, resource prediction, key and methods of biomass resource utilization analysis were proposed. This paper provides the methods for provincial biomass energy resource investigation and evaluation.
Number of references:20
Main heading:Biomass
Controlled terms:Design - Economics - Energy policy - Energy resources - Energy utilization - Fossil fuels - Resource valuation - Surveys
Uncontrolled terms:Balance analysis - Bio-mass energy - Biomass energy resources - Biomass resources - Combining method - Energy planning - Energy systems - Environmental-friendly - Evaluation program - Household energy - Jiangsu province - Resource prediction - Sampling survey - Supply and demand
Classification code:525 Energy Management and Conversion - 524 Solid Fuels - 523 Liquid Fuels - 971 Social Sciences - 522 Gas Fuels - 408 Structural Design - 405.3 Surveying - 512 Petroleum and Related Deposits
DOI:10.3969/j.issn.1002-6819.2012.04.034
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 7>
Accession number:20120914822958
Title:Degradation property of degradable film and its effect on soil temperature and moisture and maize growth
Authors:Shen, Lixia (1); Wang, Pu (2); Zhang, Lili (2)
Author affiliation:(1) College of Water Conservancy and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (2) College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
Corresponding author:Wang, P.(wangpu@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:111-116
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:Aiming at decreasing agricultural pollution caused by plastic film, degradation of two photo and bio-degradable films and their effects on soil temperature, moisture, and maize growth were studied with results compared to the plastic film and open field. Results indicated that degradable film of 0.005 mm had higher degradable degree and rate than the degradable film of 0.008 mm, with the fifth and fourth degradable degree gotten at 90 d and weight decreasing rate of 55.48% and 39.99% respectively. Effects of two degradable films on soil temperature, moisture and maize growth were same as those of plastic film, with higher soil moisture in 0-20 cm and 20-40 cm profile and higher soil temperature both surface and 10 cm below than open field. Seedling rate, growth progress, plant height, leaf area and dry weight were all higher for film covering, and effects of degradable film of 0.008 mm was better than those of 0.005 mm. Photo and bio-degradable film as substitute for plastic film could be applied to agricultural production.
Number of references:25
Main heading:Film growth
Controlled terms:Agriculture - Degradation - Films - Growth (materials) - Plastic films - Pollution control - Soil moisture - Temperature
Uncontrolled terms:Agricultural pollution - Agricultural productions - Bio-degradable - Degradable - Dry weight - Growth progress - Leaf area - Maize - Plant height - Soil temperature
Classification code:951 Materials Science - 933 Solid State Physics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 817.1 Polymer Products - 802.2 Chemical Reactions - 712.1 Semiconducting Materials - 641.1 Thermodynamics - 483.1 Soils and Soil Mechanics - 454.2 Environmental Impact and Protection
DOI:10.3969/j.issn.1002-6819.2012.04.018
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 8>
Accession number:20120914822965
Title:Remote detection system of granary temperature and moisture based on wireless transmission
Authors:Yang, Liu (1); Mao, Zhihuai (1); Jiang, Zhijie (2); Ren, Zhijun (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) Department of Automobile, Beijing Jiaotong Vocational Technical College, Beijing 102200, China
Corresponding author:Mao, Z.(maozhh@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:155-159
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 remote detection system of granary temperature and moisture was designed based on ZigBee technology to resolve problems such as wiring difficulties, poor scalability and high cost which exist in the traditional monitoring systems. CC2430 chip was used to build the Zigbee star network and every ZigBee device software was designed based on Z-Stack which was made by TI company. Basic function such as temperature and humility data acquisition was completed by the ZigBee terminal node. The data was sent to ZigBee coordinator by ZigBee website service and moisture coordinator sent data to server by RS232 serial. Moreover, database and web services were configured in the server to storage data and provided http service for remote PC. Workers can check temperature and moisture data and then control data acquisition from remote PC by http service. The correction and reliability of communication data were verified. The experiment showed that the temperature error was less than ± 0.4% and humility error was less than ± 1.0%. The results showed that this system not only transmitted data accurately and securely, but also had advantages such as better real-time, higher reliability and lower energy consumption.
Number of references:25
Main heading:Moisture control
Controlled terms:Data acquisition - Data warehouses - Energy utilization - Grain elevators - HTTP - Moisture - Monitoring - Temperature - Warehouses - Web services - Websites - Zigbee
Uncontrolled terms:Basic functions - CC2430 chip - Communication data - Control data - High costs - Lower energies - Moisture data - Monitoring system - Remote detection - Remote PC - STAR network - Temperature error - Terminal nodes - Wireless transmissions - Zigbee coordinators - ZigBee device - ZigBee technology
Classification code:944.2 Moisture Measurements - 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 - 801.4 Physical Chemistry - 723 Computer Software, Data Handling and Applications - 722.3 Data Communication, Equipment and Techniques - 641.1 Thermodynamics - 525.3 Energy Utilization - 402.1 Industrial and Agricultural Buildings
DOI:10.3969/j.issn.1002-6819.2012.04.025
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 9>
Accession number:20120914822943
Title:Experimental analysis on biomechanical properties of cucurbits grafted seedlings
Authors:Mu, Yinghui (1); Gu, Song (2); Ma, Zhiyu (3)
Author affiliation:(1) College of Agriculture, South China Agricultural University, Guangzhou 510642, China; (2) Key Laboratory of Key Technology on Agricultural Machine and Equipment, College of Engineering, South China Agricultural University, Guangzhou 510642, China; (3) Faculty of Mechanica and Electrical Engineering, ZhongKai University of Agriculture and Engineering, Guangzhou 510225, China
Corresponding author:Ma, Z.(mazhiyu2002@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:15-20
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:In order to provide a reference and parameters for designing the hole-oblique insertion hypocotyl grafting robot of cucurbit vegetables, the biomechanical properties test beds had been developed and it they were used to do the biomechanical properties experiments on cucurbitaceous crops, whose research object was common cucurbits in grafting. The morphological characteristics and biomechanical properties (such as tension resistance, compression, column stability) were measured at hypocotyl of cucurbits. The experimental results showed that it could chuck the hypocotyl more quickly and effectively with the gripper which was pasted with EVA soft elastic, and the highest tension resistance of seedling stem was 2.38 N without damaging seeding stem; the largest yield limit pressure of transverse compression was Cucurbita ficifolia and its value was 7.288 N in the seeds of common rootstocks, the smallest of yield limit pressure was figleaf gourd and its value was 3.474 N, the critical instability loads of the column with Cucurbita ficifolia was the largest and its values was 1.49 N. The correlation analysis of biomechanical properties and morphological characteristics was conducted by StatView software, and the results indicated that the long axis diameter of cucurbits had a higher correlation with biomechanical properties. It can propose a foundation for designing automatic grafting robot.
Number of references:20
Main heading:Biomechanics
Controlled terms:Crops - Equipment testing - Grafting (chemical) - Mechanical properties - Morphology - Seed
Uncontrolled terms:Biomechanical properties - Column stability - Correlation analysis - Critical instability loads - Experimental analysis - Long axis - Morphological characteristic - Research object - Transverse compression - Yield limit
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 951 Materials Science - 941 Acoustical and Optical Measuring Instruments - 821.4 Agricultural Products - 815.1 Polymeric Materials - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2012.04.003
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 10>
Accession number:20120914822988
Title:Preparation and anti-Aspergillus flavus activity of chitosan-trypsin inhibitor blend edible film
Authors:Zhang, Bin (1); Wang, Dongfeng (2); Deng, Shanggui (1); Lin, Huimin (1); Tang, Yan (1)
Author affiliation:(1) Department of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316000, China; (2) Department of Food Science, Ocean University of China, Qingdao 266000, China
Corresponding author:Deng, S.(dengshanggui@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:287-292
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 preparation method of biological film and its activity of anti-Aspergillus flavus, the chitosan-based blend film was prepared from chitosan, soybean trypsin inhibitor extract (TI) and glycerol solution, and the properties of which were also investigated, including thickness, mechanical property, water vapor transmission, optical transmittance, solubility apparent structure and anti-A. flavus activity. The results showed that the chitosan, TI and glycerol concentration got 18 mg/mL, 2 mg/mL and 12 mg/mL respectively, the blend films exhibited good physical and chemical properties, and the germination and growth of A. flavus were strongly inhibited by blend films on peanuts.
Number of references:17
Main heading:Film preparation
Controlled terms:Aflatoxins - Aspergillus - Biofilms - Blending - Chemical properties - Chitosan - Film growth - Glycerol - Mechanical properties
Uncontrolled terms:Biological films - Blend films - Edible films - Glycerol concentration - Light transmittance - Physical and chemical properties - Preparation method - Soybean trypsin inhibitor - Trypsin inhibitor - Water vapor transmission
Classification code:804.2 Inorganic Compounds - 804.1 Organic Compounds - 802.3 Chemical Operations - 801 Chemistry - 951 Materials Science - 712.1 Semiconducting Materials - 461.9 Biology - 461.6 Medicine and Pharmacology - 423 Non Mechanical Properties and Tests of Building Materials - 462.5 Biomaterials (including synthetics)
DOI:10.3969/j.issn.1002-6819.2012.04.048
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 11>
Accession number:20120914822960
Title:Influence of inflow rate of runoff on purification effectiveness of vegetative filter strip
Authors:Deng, Na (1); Li, Huaien (1); Shi, Dongqing (1); Wang, Lei (1)
Author affiliation:(1) Northwest Water Resources and Environment Ecology Key Laboratory, Ministry of Education, Xi'an University of Technology, Xi'an, 710048, China; (2) Department of Resource and Environment, Hunan Agricultural University, Changsha 410126, China
Corresponding author:Li, H.(huaienl@yahoo.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:124-129
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:Many factors affect the effectiveness of vegetative filter strip (VFS), and the purification efficiency of VFS also varies from time to time in a rainfall runoff process. Thus, the effects of inflow rate during storm-runoff on pollutants trapping by vegetative filter strips were analyzed based on the measured data from field plot experiments in this paper. Results showed that the purification effectiveness of VFS on suspended solids, total nitrogen, total phosphorus, particulate nitrogen and particulate phosphorus concentration changed greatly with different inflow rates. Furthermore, the effectiveness of VFS was more obvious along with smaller inflow rate, and grass strip had the best purification effect compared with other strips. Comparing grain diameter distribution at import and export section of each VFS, it showed more efficiency on coarse particles trapping by VFS. Therefore, the deposition of coarse particles was one of main mechanisms of pollutants removal as vegetation reduces flow velocity. The results of this study could provide a scientific support for the application of integrated constructed vegetative filter strips in northwest China.
Number of references:20
Main heading:Purification
Controlled terms:Experiments - Phosphorus - Pollution - Runoff - Vegetation
Uncontrolled terms:Coarse particles - Field plot - Grain diameter - Grain diameter analysis - Inflow rate - Measured data - NorthWest China - Particulate phosphorus - Pollutants removal - Purification effect - Purification efficiency - Rainfall-runoff process - Storm runoff - Suspended solids - Total nitrogen - Total phosphorus - Vegetative filter strips
Classification code:444.1 Surface Water - 454.2 Environmental Impact and Protection - 802.3 Chemical Operations - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.04.020
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 12>
Accession number:20120914822951
Title:Prediction analysis on water temperature in closed aqueduct in cold regions
Authors:Chen, Wu (1); Liu, Deren (1); Dong, Yuanhong (3); Xu, Xiangtian (1)
Author affiliation:(1) State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; (2) School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (3) CCCC First Highway Consultants Co. Ltd, Xi'an 710075, China
Corresponding author:Chen, W.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:69-75
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:Large water storages and diversion facilities can not be constructed at the ends of the two transportation lines of the Water Diversion Project from Tao River (WDP) in Gansu Province because of limit of engineering conditions. To solve this problem, water delivery time of the main channel has to be prolonged to winter. Based on the practical engineering condition and related heat and mass transfer theories, a three-dimensional numerical model for fluid-solid coupled convective heat transfer was established and validated by laboratory test result. The water temperature variation within the closed aqueduct under low-temperature condition in cold regions was predicted by solving the numerical model. The numerical results showed that the water temperature within the aqueduct was determined by the flow capacity, inlet water temperature, flow velocity, ambient temperature and et al. However, because of the effective design of the aqueduct, rational application of insulation and control of water flow time, the decrease of the water temperature was not obvious, and the water temperature in the aqueduct could be kept above 0°C, which ensured water supply in cold seasons. The study in this paper provides scientific reference for optimization design and safe operation of the other water diversion projects in cold regions.
Number of references:28
Main heading:Temperature
Controlled terms:Flood control - Inlet flow - Models - Numerical methods - Numerical models - River diversion - Water supply
Uncontrolled terms:Aqueduct - Cold regions - Fluid-structures - Numerical studies - Water diversion project
Classification code:921 Mathematics - 902.1 Engineering Graphics - 641.1 Thermodynamics - 921.6 Numerical Methods - 631.1 Fluid Flow, General - 446.1 Water Supply Systems - 441 Dams and Reservoirs; Hydro Development - 454.1 Environmental Engineering, General
DOI:10.3969/j.issn.1002-6819.2012.04.011
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 13>
Accession number:20120914822957
Title:Dynamic two-zone balance model for simulating soil moisture
Authors:Zhu, Xinguo (1); Zhang, Zhanyu (2); Liu, Li (3)
Author affiliation:(1) Ningbo Rural Water Management Division, Ningbo 315000, China; (2) College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China; (3) Suqian Water Affairs Bureau, Suqian 223800, China
Corresponding author:Zhu, X.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:106-110
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:Based on the soil-plant-atmosphere continuum and soil water dynamics theory, considering crop root extension and root water uptake, a dynamic two-zone model was built, which divided the soil moisture changing layer into two zones, namely, the active root zone and moisture storage zone. In the active root zone, the variation of the dynamic soil moisture with the depth change of crop root zone was described. In the moisture storage zone, the water flux on lower boundary of the root zone which indirectly has effects on crop evapo-transpiration was analyzed. Using the soil moisture of the storage zone as the model variable, the simulation fitting error as objective function, the optimization model parameters were solved using Free Search method. A comparison between the simulation results of the dynamic two-zone model and the observed values showed that the proportion of relative errors less than ± 5% is of 49.09% and ± 10% of 94.55% respectively. The t test indicated that the predicted values and the observed values had good consistency. The regression analysis indicated that their correlation coefficient was 0.779. These results show that the model has a high simulative precision.
Number of references:18
Main heading:Soil moisture
Controlled terms:Computer simulation - Dynamics - Geologic models - Models - Regression analysis
Uncontrolled terms:Balance model - Correlation coefficient - Crop roots - Depth changes - Fitting error - Free Search - Lower boundary - Model variables - Moisture storage - Objective functions - Optimization models - Relative errors - Root extension - Root zone - Root-water uptake - Soil water dynamics - Storage zones - T-tests - Two-zone model - Water flux
Classification code:481.1 Geology - 483.1 Soils and Soil Mechanics - 723.5 Computer Applications - 902.1 Engineering Graphics - 922.2 Mathematical Statistics - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2012.04.017
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 14>
Accession number:20120914822970
Title:Life cycle assessment (LCA) on three types of greenhouses construction
Authors:Shen, Jun (1); Chen, Qingyun (1); Li, Zhongming (1); Gao, Lihong (1)
Author affiliation:(1) College of Agriculture and Biotechnology, China Agriculture University, Beijing 100193, China; (2) College of Horticulture and Landscape, Henan Institute of Science and Technology, Xinxiang 453003, China
Corresponding author:Chen, Q.(caucqy@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:180-187
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:To determine the extent and the maximum impact factors of the greenhouse construction on the environment, this paper assessed the environment impacts of three types greenhouses construction by using the LCA. The results showed: the greenhouse building mainly impacted the environment in the mineral depletion, fossil fuel depletion, global warming and photochemical smog. The building materials production phase was the major impact stage which account to 90%. The impact types were varied according to the greenhouses. In general, according to the service life of various greenhouse, the environment impacts of unit area per year of the Venlo-type greenhouse was minimum which were fossil fuel depletion, mineral depletion, global warming, acidification, photochemical smog and the dust. The fresh water depletion, wood depletion, eutrophication and the solid waste of brick-wall steel-frame solar greenhouse had the minimum effect on enviroment in the construction. But the environment impacts of the brick-wall steel-frame solar greenhouse construction was most severe considering the weighting of the impact types. Those results provide the methods to assess the resource depletion and environment impact and the consultation to select the building materials for greenhouse.
Number of references:40
Main heading:Greenhouses
Controlled terms:Air pollution - Brick - Building materials - Construction - Environmental impact - Eutrophication - Fossil fuels - Global warming - Life cycle - Service life - Solar heating - Solid wastes - Walls (structural partitions)
Uncontrolled terms:Assessment - Environment impact - Fresh Water - Fuel depletion - Impact factor - Life-cycle assessments - Materials production - Photochemical smog - Resource depletion - Solar greenhouse
Classification code:913.1 Production Engineering - 451 Air Pollution - 453 Water Pollution - 454.2 Environmental Impact and Protection - 522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 643.1 Space Heating - 811 Cellulose, Paper and Wood Products - 415 Metals, Plastics, Wood and Other Structural Materials - 402 Buildings and Towers - 402.1 Industrial and Agricultural Buildings - 405 Construction Equipment and Methods; Surveying - 414.2 Brick Materials - 411 Bituminous Materials - 413 Insulating Materials - 414 Masonry Materials - 412 Concrete
DOI:10.3969/j.issn.1002-6819.2012.04.030
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 15>
Accession number:20120914822949
Title:Wind tunnel experimental study on sand-fixing effect of fly ash and polyacrylamide
Authors:Yang, Kai (1); Tang, Zejun (1); Zhao, Zhi (1); Feng, Jianzhang (1); Guo, Ping (2); Ding, Tao (2)
Author affiliation:(1) College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) Bayannur Design Institute of Water Conservancy and Hydro-electric Power, Bayannur 015000, China
Corresponding author:Tang, Z.(tangzejun@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:54-59
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:Searching for an effective and economical sand fixation measure has important significance in wind erosion control. Wind tunnel experiments were conducted to study the sand-fixing effect of fly ash at three different application rates (10%, 20% and 30%) and the intensifying action of polyacrylamide (PAM) at two different application rates (0.05% and 0.1%) on it on the basis of the optimum fly ash application rate. The results indicated that fly ash increased the threshold wind speed of the treated soil significantly, which was further increased by PAM slightly. The soil treated with 20% fly ash could most effectively withstand pure wind and sand-carrying wind with a wind speed of 8 m/s for 10 min respectively. Moderate wind erosion occurred after exposure to pure wind and sand-carrying wind with a wind speed of 14 m/s for 10 min respectively, and there was a decline in the wind erosion rate with the increase of fly ash application rate. The soil treated with 20% fly ash and PAM could effectively withstand sand-carrying wind with a wind speed of 14 m/s for 30 min. 20% fly ash application rate and 0.05% PAM application rate were recommended to realize effective and economical wind erosion protection.
Number of references:18
Main heading:Fly ash
Controlled terms:Economic and social effects - Erosion - Experiments - Sand - Soils - Wind effects - Wind tunnels
Uncontrolled terms:Application rates - Experimental studies - Polyacrylamide (PAM) - Polyacrylamides - Sand fixation - Sandy soils - Treated soils - Wind erosions - Wind speed - Wind tunnel experiment
Classification code:901.3 Engineering Research - 804 Chemical Products Generally - 651.2 Wind Tunnels - 971 Social Sciences - 483.1 Soils and Soil Mechanics - 443.1 Atmospheric Properties - 407 Maritime and Port Structures; Rivers and Other Waterways - 483 Soil Mechanics and Foundations
DOI:10.3969/j.issn.1002-6819.2012.04.009
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 16>
Accession number:20120914822971
Title:Research on warming effect of water curtain system in Chinese solar greenhouse
Authors:Zhang, Yi (1); Yang, Qichang (1); Fang, Hui (1)
Author affiliation:(1) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (2) Key Lab of Energy Conservation and Waster Treatment of Agricultural Structures, Ministry of Agriculture, Beijing 100081, China
Corresponding author:Yang, Q.(yangq@ieda.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:188-193
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 increasing air temperature at night in Chinese solar greenhouse which meet the need of crop growth, a water curtain system was designed to increase the air temperature in Chinese solar greenhouse at night. In this system north wall of Chinese solar greenhouse was regarded as a support, and water was used as media to store and release heat. In the day, when water circuited and passed water curtain, the solar radiation was absorbed in the system and stored the heat in a water tank simultaneously. At night, when water circuited and passed water curtain, the heat was released to the greenhouse and then the air temperature was increased in the Chinese solar greenhouse. The experiments had in last winter showed that the air temperature at night in greenhouse was increased by over 5.4°C and the soil temperature at crop rhizosphere was increased by over 1.6°C, the heat release from water curtain at night in this system was 4.9-5.6 MJ/m<sup>2</sup>, the increasing of the thermal storage and heat release of water curtain system in greenhouse made the tomatoes safely grow in winter and the time that cherry tomatoes was came into the market was put ahead by 20 days. It is significant to structure improvement and temperature control in Chinese solar greenhouse.
Number of references:20
Main heading:Greenhouses
Controlled terms:Atmospheric temperature - Crops - Energy storage - Fruits - Heat storage - Soils - Solar heating - Sun - Temperature - Water tanks
Uncontrolled terms:Air temperature - Crop growth - Effect of water - Heat release - Soil temperature - Solar greenhouse - Structure improvement - Thermal storage - Walls
Classification code:821.4 Agricultural Products - 702 Electric Batteries and Fuel Cells - 657.2 Extraterrestrial Physics and Stellar Phenomena - 657.1 Solar Energy and Phenomena - 821.6 Farm Buildings and Other Structures - 641.2 Heat Transfer - 483.1 Soils and Soil Mechanics - 446.1 Water Supply Systems - 443.1 Atmospheric Properties - 641.1 Thermodynamics
DOI:10.3969/j.issn.1002-6819.2012.04.031
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 17>
Accession number:20120914822966
Title:Design and experiment on monitoring device for layers individual production performance parameters
Authors:Li, Lihua (1); Huang, Renlu (2); Huo, Limin (1); Li, Jiuxi (1); Chen, Hui (2)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Agricultural University of Hebei, Baoding 071001, China; (2) College of Animal Science and Technology, Agricultural University of Hebei, Baoding 071001, China
Corresponding author:Huang, R.(dkhrl@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:160-164
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 easily and accurately record individual layers production performance under different environment, reduce errors and chicken stress caused by manual measurement, the individual layer production performance monitoring system was designed. Feed intake, excretion, water intake, egg weight, laying time parameters can be recorded through sensors and photoelectric sensors. These data were stored in PC and analyzed by C# program. The results showed that the system was stable, the relative error of feed intake was (1.96 ± 2.14)%; water intake relative error was (2.31 ± 2.01)%; excretion relative error was (2.50 ± 2.38)%; egg weight relative error was (1.32 ± 1.23)%. The laying time recording accuracy can meet the requirements. The research can provide reference for automatically monitoring laying hens individual production performance parameters.
Number of references:14
Main heading:Monitoring
Controlled terms:Design - Experiments - Inlet flow - Measurement errors - Physiology - Production
Uncontrolled terms:Feed intake - Laying hens - Laying time - Monitoring device - Performance - Photoelectric sensors - Production performance - Relative errors - Time parameter - Water intakes
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922 Statistical Methods - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 913.2 Production Control - 631.1 Fluid Flow, General - 461.9 Biology - 408 Structural Design - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.04.026
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 18>
Accession number:20120914822950
Title:Simulation study of field water transformation under deficit irrigation with SWAP model
Authors:Feng, Shaoyuan (1); Ma, Ying (2); Huo, Zailin (3); Song, Xianfang (2)
Author affiliation:(1) College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China; (2) Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; (3) Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China
Corresponding author:Huo, Z.(huozl@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:60-68
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:Deficit irrigation changes the process of field water transformation. Few previous studies discussed the soil water dynamics below the crop root zone and its impact on crop water consumption. In this study, field experiments of winter wheat-summer corn rotation under deficit irrigation were conducted at the typical farmland in Beijing. The process of crop water requirements and water conversion under deficit irrigation were simulated by the SWAP model after calibration and validation. Furthermore, the optimal deficit irrigation modes under the condition of different hydrological years were obtained based on this model. The results indicated that deficit irrigation made crop consumed large amount of soil water. When precipitation and irrigation were small, the soil water consumption could be accounted for 46.1% of crop water consumption. There was obvious soil water exchange between root zone and storage zone with the range of soil water flux from -2.67 to 0.45 mm/d. However, the water flux at the lower boundary of storage zone was small and changed a little. The percolation of the root zone always occurred after irrigation or larger precipitation, and soil water was supplemented from the storage zone upward into the root zone at the critical period of crop water requirement. Compared with conventional irrigation, the optimal irrigation modes could save irrigation water of 375 mm, 225 mm and 225 mm, and the amount of drainage reduced up to 89%, 17% and 2% in the hydrologic years of 75%, 50% and 25%, respectively.
Number of references:22
Main heading:Water management
Controlled terms:Computer simulation - Crops - Irrigation - Models - Optimization - Percolation (solid state) - Plants (botany) - Rotation - Soil moisture - Solvents - Water supply
Uncontrolled terms:Critical periods - Crop roots - Crop water consumption - Crop water requirements - Deficit irrigation - Field experiment - Hydrological years - Irrigation waters - Lower boundary - Root zone - Simulation studies - Soil water - Soil water dynamics - Soil water fluxes - Storage zones - SWAP model - Water flux - Water transformation - Water transformations
Classification code:933 Solid State Physics - 921.5 Optimization Techniques - 902.1 Engineering Graphics - 821.4 Agricultural Products - 821.3 Agricultural Methods - 803 Chemical Agents and Basic Industrial Chemicals - 723.5 Computer Applications - 601.1 Mechanical Devices - 483.1 Soils and Soil Mechanics - 461.9 Biology - 446.1 Water Supply Systems - 446 Waterworks - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.04.010
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 19>
Accession number:20120914822956
Title:Hydrogen and oxygen isotopic variations of different water bodies in evaporation and rainfall infiltration processes
Authors:Sun, Xiaoxu (1); Chen, Jiansheng (2); Shi, Gongxun (3); Tan, Hongbing (2); Liu, Xiaoyan (2); Su, Zhiguo (2)
Author affiliation:(1) College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China; (2) School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China; (3) The Third Construction Limited Company of China Construction Eighth Engineering Division, Nanjing 210046, China
Corresponding author:Sun, X.(253740501@qq.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:100-105
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 ordor to study the isotopic variations of different water bodies in soil water evaporation and rainfall infilltration processes, two different soils-sand and loess were chosen and two indoor experiments were designed. The analysis of δD and δ<sup>18</sup>O values showed that the isotope fractionation of soil water obeyed the Rayleigh model in the process of water evaporation for sand. But for the loess, the isotopic compositions of the residual soil water were away from the Rayleigh line along with the increasing of evaporation time. In the early stage of rainfall infiltration, the isotopes of outflows were affected by the air dry loess grain, which was different from the air dry sand. And the values of outflows were also affected by isotopes of the initial soil water. Only when the infiltration amount reached a certain one, the outflow could represent the isotopic composition of rainfall. The results of this study can provide data analysis basis of relationship between local rainfall and groundwater based on isotopic variations.
Number of references:18
Main heading:Isotopes
Controlled terms:Evaporation - Groundwater - Hydrogen - Infiltration - Oxygen - Phase transitions - Rain - Soil moisture
Uncontrolled terms:Dry sand - Evaporation time - Indoor experiment - Isotope fractionation - Isotopic composition - Isotopic variations - Oxygen isotopic - Rainfall infiltration - Rayleigh - Rayleigh fractionation - Rayleigh models - Residual soil - Soil water - Soil water evaporation - Water evaporation - Waterbodies
Classification code:443.3 Precipitation - 444.2 Groundwater - 483.1 Soils and Soil Mechanics - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2012.04.016
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 20>
Accession number:20120914822969
Title:Determination of tobacco leaf maturity degree based on computer vision technology
Authors:Wang, Qiang (1); Xi, Lei (1); Ren, Yanna (1); Ma, Xinming (1)
Author affiliation:(1) College of Information and Management Science, Henan Agricultural University, Zhengzhou 450002, China; (2) College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
Corresponding author:Ma, X.(xinmingma@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:175-179
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:Fast quantitative testing on the maturity of tobacco leaves is valuable to the tobacco harvest. The HSV color value of tobacco leaves was acquired approach via the process and exchange of image data collected from the sample leaves. The functional relationship between HSV color value and chlorophyll content and between chlorophyll content and SPAD value were established by the linear regression analysis. Based on the functional relationship between maturity degree and SPAD value, the TMDHSV relation model was set up between HSV color value and leaf maturity. And then the method was established for determination of tobacco leaf maturity degree based on computer vision technology. The approach has been proved feasible to acquire the maturity values of the growing tobacco leaves quickly.
Number of references:28
Main heading:Tobacco
Controlled terms:Chlorophyll - Color - Computer vision - Discriminant analysis - Image processing - Regression analysis
Uncontrolled terms:Chlorophyll contents - Color values - Computer vision technology - Functional relationship - Image data - Maturity degree - Quantitative testing - Relation models - Tobacco leave
Classification code:741 Light, Optics and Optical Devices - 804.1 Organic Compounds - 821.4 Agricultural Products - 922 Statistical Methods - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2012.04.029
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 21>
Accession number:20120914822972
Title:Energy consumption analysis on pilot-scale plant of fuel ethanol production from sweet sorghum stalk by solid state fermentation
Authors:Mei, Xiaoyan (1); Liu, Ronghou (1); Cao, Weixing (1)
Author affiliation:(1) Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (2) Liaoning Institute of Managerial Staff, Shenyang 110161, China
Corresponding author:Liu, R.(liurhou@sjtu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:194-198
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 technological process of a pilot-scale plant for fuel ethanol production from sweet sorghum stalk by solid state fermentation was described and energy consumptions of ethanol and byproduct production processes were analyzed. By applying the technology of solid-state fermentation, the conversion rate of ethanol reached 95.8% of the theoretical value. In addition, by utilizing the stalk bagasse comprehensively, the recycling and reusing of the waste heat was realized. As a result, the conversion process had an environment friendly characteristics. The annual yields of the anhydrous ethanol, protein feed and fiber pulp from the stalk were 1000 t/a, 1500 t/a and 5000 t/a, respectively. Result showed that the total energy consumption of the pilot-scale plant was 4.31 × 10<sup>6</sup> kW · h/a when waste heat recovering was considered. The energy consumptions per unit production of anhydrous ethanol, protein feed and fiber pulp were 2759.67 kW · h/t, 36.86 kW · h/t, and 298.41 kW · h/t, respectively. The recovered waste heat in anhydrous ethanol production process was 8.9 × 10<sup>5</sup> kW · h/a. The energy recovering rate during ethanol production from sweet sorghum stalk was 62.9%, which was higher than that of ethanol production from food materials such as corn.
Number of references:21
Main heading:Energy utilization
Controlled terms:Ethanol - Fermentation - Fuels - Production engineering - Recovery - Straw - Waste heat
Uncontrolled terms:Anhydrous ethanol - Conversion process - Conversion rates - Energy consumption analysis - Energy recovering - Environment friendly - Ethanol production - Fiber pulps - Food materials - Fuel ethanol - Per unit - Pilot scale - Production process - Solid fermentation - Solid-state fermentation - Sweet sorghum - Technological process - Theoretical values - Total energy consumption
Classification code:913.1 Production Engineering - 821.5 Agricultural Wastes - 802.2 Chemical Reactions - 531 Metallurgy and Metallography - 525.4 Energy Losses (industrial and residential) - 525.3 Energy Utilization - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels
DOI:10.3969/j.issn.1002-6819.2012.04.032
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 22>
Accession number:20120914822973
Title:Analysis on straw logistics cost of direct-fired power generation using activity-based costing
Authors:Chen, Lihuan (1); Li, Yinian (1); Ding, Weimin (1); Liu, Jinlong (1); Shen, Baoying (1)
Author affiliation:(1) College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:Ding, W.(wmding@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:199-203
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 high-cost of straw logistics restricted the extension of direct-fired power generation. To solve the above problem, the straw logistics cost was investigated in some places, including Jiangsu, Henan, Hebei province. Activity-based costing was used to analyze logistics costs of four kinds of straws under the investigated data, such as rice, wheat, corn and cotton straw. Meanwhile, heat values of four kinds of straws were tested and the costs of per unit heat value were calculated respectively, which were 1.40 × 10<sup>-2</sup> yuan/MJ, 1.15 × 10<sup>-2</sup> yuan/MJ, 1.09 × 10<sup>-2</sup> yuan/MJ and 0.96 × 10<sup>-2</sup> yuan/MJ. The experimental results showed that cotton straw was a better fuel with low cost and high heat value. Corn and wheat straw were almost the same. However, wheat straw was relatively better in general and rice straw was the main choice in Southern China because of its advantage in geographical location. It provides a reference for economic technology analysis for biomass power-plant fuel.
Number of references:22
Main heading:Cost benefit analysis
Controlled terms:Biomass - Cost accounting - Costs - Cotton - Logistics - Straw
Uncontrolled terms:Activity based costing - Activity centers - Cost driver - Direct-fired - Economic technology - Geographical locations - Heat value - Hebei Province - Logistics costs - Low costs - Per unit - Rice straws - Southern China - Wheat straws
Classification code:821.4 Agricultural Products - 821.5 Agricultural Wastes - 911 Cost and Value Engineering; Industrial Economics - 911.1 Cost Accounting - 912 Industrial Engineering and Management - 913 Production Planning and Control; Manufacturing
DOI:10.3969/j.issn.1002-6819.2012.04.033
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 23>
Accession number:20120914822952
Title:Relationship model among water content, bulk density and reflectivity of different soil
Authors:Chen, Zhen (1)
Author affiliation:(1) School of Mechanical-Electronic of Wuhan University of Technology, Wuhan 430070, China
Corresponding author:Chen, Z.(chenzhen1010@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:76-81
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 was to find out a way to measure wet expansion and dry shrinkage type soil moisture accurately and rapidly, and a method was proposed to analyze soil moisture base on near-infrared spectroscopy (NIRS). Taking yellow brown soil, Chao soil and rice soil in Hubei province as study objects, the spectra of soil samples with different soil moisture content were measured by NIR256-2.5 micro fiber spectrometer of Ocean Optic company in America in the dark room environment, corresponding soil bulk density was measured at the same time, relationship among soil water content?bulk density and spectral reflectivity was researched. Through comparative tests analysis reflecting the relationship of soil water content and spectral reflectivity by use of two soil water content representation methods and three soil spectral reflectivity representation methods, effect of soil other characters on soil reflectivity retrieval soil content was eliminated, suitable soil spectral reflectivity inversion of soil water content matching method was obtained and the surface model of such relationships and the exponent relationship model between soil volume water content of bulk density change and soil spectral reflectivity were constructed. The results showed that decision coefficients of three kinds of soil surface regression models constructed were more than 0.977, F values reached extremely significant level, and spectral reflectance and the bulk density of the partial regression coefficient were also significant or extremely significant level. The decision coefficients of exponent relationship model between soil volume water content of bulk density change and normalized reducing soil reflectivity at 1400 and 1900 nm wavelength were more than 0.9, and the forecast errors were about 0.3 when the exponent model was verified and the precision was relatively good, so the built models had a good fitting effect. This study can provide a scientific reference for using near infrared spectroscopy to detect bulk density variable soil water content.
Number of references:26
Main heading:Geologic models
Controlled terms:Near infrared spectroscopy - Reflection - Regression analysis - Shrinkage - Soil moisture - Soils - Water content
Uncontrolled terms:Brown soil - Bulk density - Comparative tests - Dark room - Dry shrinkage - F values - Forecast errors - Hubei Province - Micro-fiber - Ocean optics - Partial regression coefficients - Relationship model - Representation method - Rice soil - Soil bulk density - Soil content - Soil sample - Soil surfaces - Soil volume - Soil water content - Spectral reflectances - Spectral reflectivity - Surface models
Classification code:951 Materials Science - 922.2 Mathematical Statistics - 801 Chemistry - 711 Electromagnetic Waves - 483.1 Soils and Soil Mechanics - 481.1 Geology - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.04.012
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 24>
Accession number:20120914822948
Title:Distribution and dynamic characteristic of particle group with different concentration in structural flow passage
Authors:Ji, Shiming (1); Zhong, Jiaqi (1); Tan, Dapeng (1); Chi, Yongwei (1); Li, Chen (1)
Author affiliation:(1) Key Laboratory of E and M, Zhejiang University of Technology, Ministry of Education and Zhejiang Province, Hangzhou 310014, China
Corresponding author:Tan, D.(tandapeng@zjut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:45-53
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:Because of the driving action of liquid phase, particles will be collided the surface and impacted with each other in the flow passage, then the surface will be machined though this continuous action of impact force and friction force. Based on the coupled theory of liquid-solid two phases flow, mixture model which belongs to Euler-Euler multiphase flow model and realizable k-Ε turbulence model were used to analyze turbulent effects of liquid-solid two-phase flow in the wall area, and some parameters such as turbulent velocity and turbulent energy were calculated with different particles concentration in the flow passage which had V-shaped texture and semicircular cross-section. Simulation results showed that 1) turbulence could be improved by assembling V-shaped constrained component; 2) as the concentration of particles increased, particles velocity would be increased in a certain range, turbulent energy reduced gradually, and amplitude of particles volume fraction is also decreased; and 3) the concentration of particles should be selected properly and different particles distribution and finishing performance would be obtained with different particles concentration.
Number of references:21
Main heading:Concentration (process)
Controlled terms:Abrasives - Dynamics - Liquids - Multiphase flow - Numerical methods - Precision engineering - Turbulence models
Uncontrolled terms:Coupled theory - Dynamic characteristics - Euler-Euler - Flow passage - Friction force - Impact force - Liquid Phase - Liquid solids - Liquid-solid two phase flow - Mixture model - Multi-phase flow models - Particle concentration - Particles concentration - Particles distribution - Precision machining - Structural surfaces - Turbulent effects - Turbulent energies - Turbulent velocity - Two phases flow
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 921.6 Numerical Methods - 802.3 Chemical Operations - 761 Nanotechnology - 631.1 Fluid Flow, General - 606.1 Abrasive Materials
DOI:10.3969/j.issn.1002-6819.2012.04.008
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 25>
Accession number:20120914822975
Title:Comparison of biogas production efficiency of anaerobic digestion using water hyacinth and its juice from solid-liquid separation as feedstock
Authors:Ye, Xiaomei (1); Chang, Zhizhou (1); Qian, Yuting (1); Zhu, Ping (1); Du, Jing (1)
Author affiliation:(1) Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
Corresponding author:Chang, Z.(chang02@jaas.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:208-214
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 exploit efficient technology of anaerobic digestion with water hyacinth, a laboratory experiment was carried out to assess the performance of water hyacinth and its juice from solid-liquid separation as feedstock in two continuous stirred-tank reactors (CSTR) at 35°C. Results showed that when using water hyacinth as feedstock for anaerobic digestion, the suitable organic loading rate (OLR) were 2.0 kg/(m<sup>3</sup> · d) with 27 d hydraulic retention time (HRT), and the relevant biogas production rate of volatile solid and the volume biogas yield were achieved at 267 mL/g and 0.61 m<sup>3</sup>/(m<sup>3</sup> · d) with 58% average methane content, respectively. Comparatively, using the juice of water hyacinth as feedstock for anaerobic digestion, the biogas production rate of chemical oxygen demand (COD) and OLR were 6 kg/(m<sup>3</sup> · d) and 1.4 m<sup>3</sup>/(m<sup>3</sup> · d), respectively, in which average methane content was 66%. Meanwhile, its HRT was reduced to 2.4 d. The reduction of COD and mixed liquor volatile suspended solids (MLVSS) were over 85% and 88%, respectively. Therefore, the juice of water hyacinth as feedstock for anaerobic digestion had higher utilization efficiency compared with water hyacinth itself, and consequently a new method for utilization of water hyacinth with less investment could be exploited.
Number of references:25
Main heading:Anaerobic digestion
Controlled terms:Biogas - Chemical oxygen demand - Efficiency - Feedstocks - Methanation - Separation - Tanks (containers)
Uncontrolled terms:Biogas production - Continuous stirred tank reactor - Efficient technology - Hydraulic retention time - Juice of water hyacinth - Laboratory experiments - Methane content - Mixed liquor volatile suspended solids - Organic loading rates - Solid-liquid separation - Utilization efficiency - Volatile solid - Water Hyacinth
Classification code:804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 913.1 Production Engineering - 802.2 Chemical Reactions - 522 Gas Fuels - 453 Water Pollution - 619.2 Tanks
DOI:10.3969/j.issn.1002-6819.2012.04.035
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 26>
Accession number:20120914822986
Title:Effects of low temperature storage on chilling injury and energy status in peach fruit
Authors:Chen, Jingjing (1); Jin, Peng (1); Li, Huihui (1); Cai, Yuting (1); Zhao, Yingying (1); Zheng, Yonghua (1)
Author affiliation:(1) College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Zheng, Y.(zhengyh@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:275-281
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 relationship between chilling injury and energy status of peach fruit, freshly harvested peach fruits were stored at 0?5 or 10°C, and fruit browning index, firmness, extractable juice rate, the activities of mitochondria respiratory metabolism-related enzyme H<sup> </sup>-ATPase, Ca<sup>2 </sup>-ATPase, succinic dehydrogenase (SDH), cytochrome C oxidase (CCO), contents of ATP, ADP, AMP and energy charge were determined during storage. The results showed that the incidence of chilling injury of peaches varied among different storage temperatures. The chilling injury was much more severe in fruits stored at 5°C than at 0°C, while no chilling injury symptoms was observed in peach fruit stored at 10°C. Moreover, peaches stored at 5°C had lower contents of ATP, ADP, energy charge, activities of H<sup> </sup>-ATPase, SDH and CCO compared to those stored at 0 or 10°C. These results suggested that the development of chilling injury might be resulted from limited energy availability.
Number of references:21
Main heading:Fruits
Controlled terms:Enzymes - Quality control - Refrigeration
Uncontrolled terms:Browning index - Chilling injury - Cytochrome c oxidase - Energy availability - Energy level - Energy status - Low temperatures - Low-temperature storage - Storage temperatures
Classification code:644.4 Cryogenics - 804.1 Organic Compounds - 821.4 Agricultural Products - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2012.04.046
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 27>
Accession number:20120914822959
Title:Effects of drip irrigation mode and NaCl concentration on hydraulic resistance and water use of young apple tree
Authors:Yang, Qiliang (1); Zhang, Fucang (2); Liu, Xiaogang (1); Ge, Zhenyang (1)
Author affiliation:(1) Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China; (2) Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Zhang, F.(zhangfucang@tom.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:117-123
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 research investigated the effect of four NaCl levels (0% (CK), 0.2% (S1), 0.3% (S2) and 0.4% (S3)) and three drip irrigation modes [alternate partial rootzone drip irrigation (ADI: alternate watering on both sides of the root-zone), fixed partial rootzone watering (FDI: fixed watering on one side of the root-zone) and conventional watering (CDI: Simultaneous watering on both sides of the root-zone)] on the physiological characteristic, hydraulic resistance and water use of young apple tree (Malus pumila) under greenhouse condition. The results show that the relationship between leaves hydraulic resistance (R<inf>l p</inf>) and leaf water use efficiency (WUE<inf>l</inf>), the total hydraulic resistance (R<inf>t</inf>) and irrigation water use efficiency (WUE<inf>i</inf>) were described as a logarithmic correlation. Compared with the CDI, water-saving up to 50 percent for ADI, but the average root dry matter and root hydraulic resistance (R<inf>r</inf>) only decreased by 8.7% and 0.53%, respectively, and WUE<inf>l</inf>, WUE<inf>i</inf>, R<inf>l p</inf>, shoot hydraulic resistance (R<inf>sh</inf>) and R<inf>t</inf> were increased by 7.6%, 16.96%, 74.85%, 35.33% and 15.22% under the same NaCl concentration. and the R<inf>l p</inf> and WUE<inf>i</inf> increased by 50.5% and 78.07% for ADI, respectively, but the R<inf>r</inf> decrease by 1.34% and 9.96% under the higher NaCl concentration as S2 and S3 treatment. This shows ADI treatment has an obvious promoting effect on the root growth of young apple tree, meanwhile, increased R<inf>l p</inf> and decreased R<inf>r</inf>, so these are some important reasons for improving water use efficiency of ADI treatment, and not only to improve the control and regulation plant water ability, but also to be strengthened resistance stability to salt-stress.
Number of references:24
Main heading:Stream flow
Controlled terms:Concentration (process) - Forestry - Fruits - Greenhouse effect - Greenhouses - Irrigation - Moisture - Sodium chloride - Subirrigation - Water conservation - Water supply
Uncontrolled terms:Apple trees - Drip irrigation - Greenhouse conditions - Hydraulic resistance - Hydraulic resistances - Irrigation water use efficiency - Leaf water - NaCl concentration - Physiological characteristics - Plant water - Promoting effect - Resistance stability - Root dry matter - Root growth - Salt stresss - Water use - Water use efficiency - Water-saving
Classification code:804.2 Inorganic Compounds - 802.3 Chemical Operations - 801.4 Physical Chemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 631.1 Fluid Flow, General - 446.1 Water Supply Systems - 444 Water Resources - 451 Air Pollution
DOI:10.3969/j.issn.1002-6819.2012.04.019
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 28>
Accession number:20120914822980
Title:Spatial variability of karst rock desertification based on geostatistics and remote sensing
Authors:Yang, Qiyong (1); Jiang, Zhongcheng (1); Ma, Zulu (1); Luo, Weiqun (1); Yin, Hui (1); Yu, Qiwen (1); Li, Wenjun (2)
Author affiliation:(1) Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China; (2) College of Resources and Environment and Tourism, Hunan University of Arts and Science, Changde 415000, China
Corresponding author:Jiang, Z.(zh_jiang@yahoo.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:243-247
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 master the spatial variability of karst rock desertification, and solve the problem of the shadow "missing" information of remote sensing images existing in the karst area, rock desertification indices were extracted in Guohua Ecological Experimental Area, which was in Pingguo county of Guangxi province by applying image processing software of ENVI (environment for visualizing images). And the rock desertification indices of the shadow areas were excluded with the remote sensing images, then their spatial distribution were analyzed with geostatistical method. The results indicated that the rock desertification indices of the study area were impacted intrinsic factors and performed strong spatia1 autocorrelation. The spatial distribution maps of the rock desertification indices interpolated by Kriging interpolation method showed that the higher indices emerged in the northeast and southwest of the study area, and the spatial distribution of the karst rock desertification was apparently strip and block. The spatial distribution of the rock desertification levels in the study area is chiefly controlled by lithology and topography. Using geostatistical methods to predict the shadow "missing" information can provide a new idea and method for monitoring and evaluation of the karst rock desertification.
Number of references:18
Main heading:Weathering
Controlled terms:Climatology - Image reconstruction - Interpolation - Landforms - Lithology - Remote sensing - Rocks - Spatial distribution - Spatial variables measurement
Uncontrolled terms:Geo-statistics - Geostatistical method - Guangxi - Higher index - Image-processing software - Intrinsic factors - Karst areas - Kriging interpolation - Remote sensing images - Rocky desertification - Semi-variances - Spatial distribution map - Spatial variability - Spatial variables - Study areas
Classification code:921.6 Numerical Methods - 921 Mathematics - 741 Light, Optics and Optical Devices - 943.2 Mechanical Variables Measurements - 731.1 Control Systems - 443 Meteorology - 421 Strength of Building Materials; Mechanical Properties - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2012.04.040
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 29>
Accession number:20120914822945
Title:Simulation analysis on effect of variable compression ratio on turbocharged and inter-cooled diesel engine performance
Authors:Zhu, Yiliang (1); He, Yongling (1); Stobart, Richard (2)
Author affiliation:(1) School of Transportation Science and Engineering, Beihang University, Beijing 100191, China; (2) Department of Aeronautical and Automotive Engineering, Loughborough University, Leicestershire LE11 3TU, United Kingdom
Corresponding author:Zhu, Y.(zhuyiliang0913@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:27-32
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 effect of variable compression ratio (VCR) on fuel economy and emission reduction, a model of the heavy duty diesel engine C6.6 equipped with inter-cooling exhaust gas recirculation (EGR) and a variable geometry turbocharger (VGT) was presented and analyzed based on the GT-Power software and its validity was verified with a predictive direct-injection jet combustion model. The simulation results showed that the use of variable compression ratio improved fuel economy to 7.2% at low and medium load, also NOx and soot emissions could meet the need of Euro V values for ETC with corresponding EGR fraction and VGT strategy. Variable compression ratio can improve the fuel economy and emission performance of direct injection diesel engine effectively.
Number of references:20
Main heading:Diesel engines
Controlled terms:Compression ratio (machinery) - Computer simulation - Computer software - Fuel economy - Machine design - Neutron emission
Uncontrolled terms:Combustion model - Diesel engine performance - Direct injection diesel engines - Emission performance - Emission reduction - GT-Power - Heavy-duty diesel engine - Intercooled - Intercooling - Simulation analysis - Soot emissions - Variable compression ratio - Variable geometry turbocharger
Classification code:932.1 High Energy Physics - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 612.2 Diesel Engines - 612.1 Internal Combustion Engines, General - 601 Mechanical Design - 521 Fuel Combustion and Flame Research
DOI:10.3969/j.issn.1002-6819.2012.04.005
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 30>
Accession number:20120914822984
Title:Dynamics and model for supercritical carbon dioxide drying of tilapia fillet
Authors:Liu, Shucheng (1); Zhang, Changsong (1); Zhang, Liang (1); Ji, Hongwu (1); Zhang, Chaohua (1); Hong, Pengzhi (1); Deng, Chujin (1)
Author affiliation:(1) Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang 524088, China; (2) College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
Corresponding author:Liu, S.(Lsc771017@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
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:The supercritical CO<inf>2</inf> drying is a new drying technique. In order to master the supercritical CO<inf>2</inf> drying characteristics of tilapia fillet, the influences of the temperature, pressure and CO<inf>2</inf> flow on supercritical CO<inf>2</inf> drying process of tilapia fillet under certain condition were studied and the equations of drying curve were fitted. The results showed that drying temperature (35-55°C) had a significant effect on supercritical CO<inf>2</inf> drying, while pressure (15-35 MPa) and flow of CO<inf>2</inf> (15-35 L/h) had a less effect on supercritical CO<inf>2</inf> drying. The drying process could accurately be described by the Page model. The results can provide some helpful information for industrialization production and control of supercritical CO<inf>2</inf> drying for tilapia fillet.
Number of references:22
Main heading:Drying
Controlled terms:Carbon dioxide - Dynamics - Models - Supercritical fluid extraction
Uncontrolled terms:Drying characteristics - Drying curves - Drying process - Drying technique - Drying temperature - Page models - Supercritical carbon dioxides - Supercritical CO - Tilapia fillet
Classification code:802.3 Chemical Operations - 804.2 Inorganic Compounds - 902.1 Engineering Graphics - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2012.04.044
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 31>
Accession number:20120914822967
Title:Adaptive PID decouple control strategy for wind power aided pumping water system based on neural network
Authors:Du, Fuyin (1)
Author affiliation:(1) School of Mechanical Engineering and Automation, Xihua University, Chengdu 610039, China
Corresponding author:Du, F.(dufynew@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:165-168
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 characteristics of wind turbine and water pump, a new scheme and its control strategy for wind power aided pumping water machine were proposed. The problems such as maximum power point tracking of wind energy and power balance between wind turbine and diesel engine need to be solved, so the system proposed is a coupling two input two output time-variable system. Based on the principle of decoupling and recurrent neural network, two Diagonal Recurrent Neural Network (DRNN) was adopted to adjust the parameters of two PID controllers online, and one nerve cell decouple compensator was adopted for decoupling the system, thus, non-model adaptive decouple PID control was implemented. Finally, the validity of the control strategy was proved via computer simulations, which can provide a foundation for further study.
Number of references:16
Main heading:Three term control systems
Controlled terms:Computer simulation - Couplings - Diesel engines - Neurons - Pumping plants - Pumps - Recurrent neural networks - Wind power - Wind turbines
Uncontrolled terms:Adaptive PID - Control strategies - Decouple control - Diagonal recurrent neural networks - Maximum Power Point Tracking - PID controllers - Power balance - Two input - two outputs - Water pump - Water system
Classification code:723.5 Computer Applications - 723.4 Artificial Intelligence - 618.2 Pumps - 615.8 Wind Power (Before 1993, use code 611 ) - 731.1 Control Systems - 612.2 Diesel Engines - 461.9 Biology - 461.1 Biomedical Engineering - 446 Waterworks - 602 Mechanical Drives and Transmissions
DOI:10.3969/j.issn.1002-6819.2012.04.027
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 32>
Accession number:20120914822987
Title:Effect of citrus young fruit extract on lipid oxidation of raw ground pork during refrigerated storage
Authors:Zhang, Jinjie (1); Gu, Weigang (1); Yao, Yanjia (1); Lü, Bingbing (1); Chen, Jianchu (1); Ye, Xingqian (1)
Author affiliation:(1) College of Biosystem Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
Corresponding author:Ye, X.(psu@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:282-286
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 efficacy of different mass fraction of citrus young fruit extract (CE) in retarding oxidative rancidity was tested in raw ground pork during storage. Fresh ground pork meat was assigned to one of the following five processing: control (no antioxidants); AC-0.02 (0.02% ascorbic acid); CE-0.05, 0.1, and 0.2 (0.05%, 0.1% and 0.2% CE, respectively). The pH of the samples decreased and the TBARS values and free fatty acids increased considerably (p < 0.05) during storage. Samples treated with CE-0.1 and CE-0.2 presented lower total bacterial count than the control samples through the whole storage. The L<sup>*</sup> value and a<sup>*</sup> value decreased (p < 0.05) with the addition of CE. The internal b<sup>*</sup> value of CE treatments were higher (p < 0.05) than that of the control one and increased incrementally with CE concentration. The TBARS value and free fatty acids of CE-0.2 treated samples were the lowest among the treatments. The peroxide value (POV) of the control increased for 6 days and reached the maximum value at a certain storage time and decreased thereafter. In other treatments, POV increased all along the storage time. All treatments had lower concentration of conjugated dienes (CD) (p < 0.05) compared to the control sample after the first day. Citrus young fruits of ethanolic extract exhibitsa protective effect against lipid oxidation in raw ground pork and provides the reference for meat processing industry.
Number of references:20
Main heading:Citrus fruits
Controlled terms:Ketones - Meats - Olefins - Organic acids - Oxidation - pH - Refrigeration
Uncontrolled terms:Antimicrobial - Antioxidants - Ascorbic acids - Ce concentration - Conjugated dienes - Control samples - Different mass - Ethanolic extracts - Free fatty acid - Fruit extracts - Lipid oxidation - Maximum values - Meat-processing industry - Peroxide value - Pork - Pork meat - Protective effects - Refrigerated storages - Storage time - Total bacterial count
Classification code:644.4 Cryogenics - 801.1 Chemistry, General - 802.2 Chemical Reactions - 804.1 Organic Compounds - 821.4 Agricultural Products - 822.3 Food Products
DOI:10.3969/j.issn.1002-6819.2012.04.047
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 33>
Accession number:20120914822953
Title:Experimental research on change characteristics of soil air permeability in stony soil medium
Authors:Wang, Weihua (1); Wang, Quanjiu (1); Wang, Shuo (1)
Author affiliation:(1) Institute of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an 710048, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, The Chinese Academy of Sciences, Yangling 712100, China
Corresponding author:Wang, Q.(wquanjiu@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:82-88
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:Soil structure and pore distribution will be changed by rock fragment, which affects the air permeability and water conductivity. The inherent mechanism of soil air permeability by single rock fragment particle size in stony-soil medium was discussed, which was the basis for investigating the soil air permeability in complex stony-soil medium. Influences of soil air permeability in stony soil medium in different samples which soil particle size less than 2 mm (sand, sandy loam soil, clay loam soil), different rock fragment contents (10%, 20%, 30%, 40%) and different rock fragment particle sizes (2-3, > 3-5 mm) were analyzed. Results showed that the values of samples with particle size less than 2mm were in the order of sand > sand loam soil > clay loam soil. For the stony soil medium with the same rock fragment content, the values of soil air permeability were in the order of sand loam soil > sand > clay loam soil. The presence of rock fragment improved soil structure and the performance of soil air permeability, made the permeability of stony-soil Medium better than that of clay loam, decreased the air permeability of sand loam soil and sand. And depression amplitude of sandy soil was far larger than that of sandy loam. Soil air permeability of rock fragment particle of > 3-5 mm was greater than that of 2-3 mm when the rock fragment content in sand loam soil was less than 30%, and the situation was opposite when the rock fragment content in sand loam soil was 40%; air permeability of stony soil medium was little difference under the two rock fragment particle sizes condition.
Number of references:18
Main heading:Soils
Controlled terms:Air permeability - Particle size - Physical properties - Pore size - Rocks - Sand - Soil conditioners
Uncontrolled terms:Clay loam soils - Clay loams - Experimental research - Loam soils - Pore distribution - Rock fragment content - Rock fragments - Sandy loam soils - Sandy loams - Sandy soils - Soil medium - Soil particle size - Soil structure - Stony soil medium - Water conductivity
Classification code:481.1 Geology - 483.1 Soils and Soil Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2012.04.013
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 34>
Accession number:20120914822964
Title:Application mode construction of internet of things (IOT) for facility agriculture in Beijing
Authors:Yan, Xiaojun (1); Wang, Weirui (1); Liang, Jianping (1)
Author affiliation:(1) Information Center of Beijing Municipal Bureau of Agriculture, Beijing 100029, China
Corresponding author:Liang, J.(liangjp@bjny.gov.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:149-154
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:Focusing on the issues on the quality and safety of agricultural products and ecological environment safety in Beijing, with the "shopping basket" program requirements of the Beijing government, in accordance with the whole industrial chain of facilities agriculture which includes before/during/post producing, by using technologies of biological, sensor, wireless communication and automatic control so on, the application pattern of IOT was constructed in the needs of the current situation and development of the facility agriculture in Beijing. Mainly using IOT technology with independent intellectual property rights, the perception environment, low cost wireless self-organized network, cloud services platform, intelligent decision-making service and feedback control system were constructed were based on facility agricultural IOT in Beijing, realizing remote diagnosis, monitor and early warning, command decision about the diseases and pests, intelligence control of fertilizer/water/drug, quality and safety supervision and tracing about facility agricultural products, formulating the related technical standards to provide a reference for the establishment of technology standards for facility agricultural IOT in our country. Successful construction application mode of facility agricultural IOT in Beijing will provide the reference model for construction of IOT system in other parts of the country.
Number of references:17
Main heading:Accident prevention
Controlled terms:Adaptive control systems - Agricultural products - Agriculture - Automation - Diagnosis - Facilities - Intellectual property - Intelligent control - Internet - Sensors - Wireless telecommunication systems
Uncontrolled terms:Cloud services - Construction applications - Current situation - Early warning - Ecological environments - Industrial chain - Intellectual property rights - Intelligence control - Intelligent decision-making - Internet of things - Internet of things (IOT) - Low costs - Reference models - Remote diagnosis - Safety supervision - Self-organized networks - Technical standards - Technology standards - Wireless communications
Classification code:914.1 Accidents and Accident Prevention - 731.1 Control Systems - 732 Control Devices - 801 Chemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 902.3 Legal Aspects - 731 Automatic Control Principles and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 461.6 Medicine and Pharmacology - 402 Buildings and Towers - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2012.04.024
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 35>
Accession number:20120914822942
Title:Development and experiment of vegetable grafting robot
Authors:Jiang, Kai (1); Zheng, Wengang (1); Zhang, Qian (2); Guo, Rui (1); Feng, Qingchun (1)
Author affiliation:(1) Beijing Research Center for Intelligent Equipment in Agriculture, Beijing 100097, China; (2) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Zheng, W.(zhengwg@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:8-14
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 china, vegetable grafting was done mostly by manual work. To solve the problems such as low efficiency, low survival rate and low quality, according to the splice grafting process of gourd and solanaceous seedlings, with double feeding location of seedlings, transporting device, cutting device, seedling-fixing device and clip-delivering device were determined and a prototype model of vegetable grafting robot was constructed based on simulation design in this article. Mechanism analysis and experiment showed that when the cutting knife rotation radius was 68 mm and the cutting speed was 120 r/min, the success rate of seedling cutting was 98% which could meet the need of grafting technique. The grafting rate reached 884 plants per hour, grafting success rate was 95.7% and survival ratio was 96.8%. Therefore, grafting robot can resolve existing problem of artificial grafting take place of manual work.
Number of references:24
Main heading:Grafting (chemical)
Controlled terms:Agricultural machinery - Computer simulation - Experiments - Machine design - Robots - Seed - Vegetables
Uncontrolled terms:Cutting knives - Cutting speed - Development - Existing problems - Gourd and solanaceous seedlings - Grafting process - Grafting rate - Grafting techniques - Low qualities - Manual work - Mechanism analysis - Prototype models - Simulation Design - Survival rate - Survival ratio
Classification code:901.3 Engineering Research - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 815.1 Polymeric Materials - 731.5 Robotics - 723.5 Computer Applications - 601 Mechanical Design
DOI:10.3969/j.issn.1002-6819.2012.04.002
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 36>
Accession number:20120914822944
Title:Cruise control system of tractor based on automated mechanical transmission
Authors:Han, Keli (1); Zhu, Zhongxiang (1); Mao, Enrong (1); Song, Zhenghe (1); Hu, Fengsheng (1); Xu, Linlin (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Zhu, Z.(zhuzhonxiang@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:21-26
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 apply a cruise control system (CCS) to the tractor with less labor intensity, such as sowing and spraying, a electro-hydraulic automated mechanical transmission (AMT) was developed, a automatic adjusting mechanism of throttle was designed, a single chip microcontroller using advanced RISC machine 7 (ARM7) was exploited and incremental proportional-integral-differential control algorithm was designed based on the platform of tractor of FOTON LOVOL TG1254 in this paper. The designed CCS was tested at different speed on the concrete road, the experimental results indicated that the developed CCS run reliably and stably, the speed control accuracy was less than 0.2 m/s, it meets the need of cruise control. It provides a hardware foundation for realization cruise control of tractor at different speed.
Number of references:29
Main heading:Tractors (truck)
Controlled terms:Algorithms - Automation - Computer control - Concrete construction - Cruise control - Equipment - Hydraulic machinery - Microcontrollers - Three term control systems - Tractors (agricultural) - Transmissions
Uncontrolled terms:Adjusting mechanism - Advanced RISC machines - Automated mechanical transmissions - Concrete roads - Control accuracy - Cruise control systems - Different speed - Electro-hydraulics - Labor intensity - Proportional integral differential control - Single-chip microcontrollers
Classification code:921 Mathematics - 901 Engineering Profession - 732 Control Devices - 731 Automatic Control Principles and Applications - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment - 663.1 Heavy Duty Motor Vehicles - 632.2 Hydraulic Equipment and Machinery - 602.2 Mechanical Transmissions - 523 Liquid Fuels - 412 Concrete - 405 Construction Equipment and Methods; Surveying
DOI:10.3969/j.issn.1002-6819.2012.04.004
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 37>
Accession number:20120914822985
Title:Effects of temperature on electrical parameters for 'Huoshi' persimmon fruit
Authors:Wang, Ruiqing (1); Zhou, Yonghong (1); Zhang, Jishu (1)
Author affiliation:(1) College of Life Sciences, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Jinan Fruit Research Institute, China Supply and Marketing Cooperatives, Ji'nan, 250014, China
Corresponding author:Zhang, J.(jishu@nwsuaf.edu)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:269-274
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 effects of temperature on electrical parameters for 'Huoshi' persimmon fruit, variation of electrical parameters with temperature of intact 'Huoshi' persimmon fruit was studied over a frequency range from 100 Hz to 3.98 MHz with LCR meter and parallel plate electrode. Frequency and temperature characteristics of electrical properties were also illuminated by biology and electromagnetism theories. The results showed that fruit impedance, inductance and low frequency (f &le 15.8 kHz) conductance varied in exponential form with the increase of frequency. As the fruit temperature rised from 10°C to 40°C, fruit impedance decreased from 28% at 3.98 MHz to 38% at 1 kHz, the inductance 30% at 3.98 MHz to 38% at 1 kHz, while the capacitance increased from 43% at 3.98 MHz to 56% at 1 kHz, and the conductance had an increasing trend. Linearly correlation equations were built between fruit temperature and electrical parameters for the prediction of electrical parameter values at different temperatures. Frequency properties of fruit electrical parameters were attributed to the in-homogeneity of fruit structure, penetrating capacity variance of the electric field to the flesh and the variation of dominant dielectric loss factors at different frequency ranges, while the ionic conduction accounted for the temperature behavior of the electrical parameters.
Number of references:22
Main heading:Electric properties
Controlled terms:Dielectric losses - Electric fields - Frequency response - Fruits - Inductance - Temperature
Uncontrolled terms:Correlation equation - Dielectric loss factors - Different frequency - Effects of temperature - Electrical parameter - Electromagnetism theory - Exponential form - Frequency properties - Frequency ranges - LCR meters - Low frequency - Parallel-plate electrodes - Persimmon - Temperature behavior - Temperature characteristic
Classification code:641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 731.1 Control Systems - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2012.04.045
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 38>
Accession number:20120914822982
Title:Device method for accurate measuring length of edible casing
Authors:Zhu, Qiuchen (1); Sun, Weilian (1); Sun, Bo (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Agricultural University of Hebei, Baoding, Hebei 071001, China
Corresponding author:Sun, W.(sunweilian@hebau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:254-257
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:Edible casing is in light weight, which has higher economic value, resilience, greasy and smooth properties, but it is more difficult to measure the length of that. Through studying the demands of the market, a new machine for measuring the length of edible casing was designed. Its band carrier drew the casing moving and stepping motor controled the speed of band carrier. The data of the measuring wheel were recorded by high-accuracy circle encoder, the speed of stepping motor was regulated by Programmable Logic Controller, and control parameters were inputted and measurement data were showed by touch screen, etc. As the use of key technology, the problems of measurement of edible casing length were solved. The speed reached 0.84 m/s, and the efficiency of the machine was twice of the manual measurement. High automation system makes the work of measuring the length of edible casing reliable and the environment of production healthy. Practice proves that the measurement system of casing can meet the requirements of production process, the measurement error is equal or lesser than 0.4%, the measurement precision was improved.
Number of references:17
Main heading:Measurements
Controlled terms:Design - Programmable logic controllers - Stepping motors - Tools
Uncontrolled terms:Control parameters - Economic values - High automation - High-accuracy - Key technologies - Light weight - Measurement accuracy - Measurement data - Measurement precision - Measurement system - Production process - Touch screen
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 - 732.1 Control Equipment - 705.3 Electric Motors - 605 Small Tools and Hardware - 603 Machine Tools - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2012.04.042
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 39>
Accession number:20120914822977
Title:Prediction of land use structure based on biodiversity conservation
Authors:Wang, Jianying (1); Li, Jiangfeng (2); Zhang, Liqin (2); Zou, Lilin (2)
Author affiliation:(1) School of Economics and Management, China University of Geosciences, Wuhan 430074, China; (2) School of Earth Resources, China University of Geosciences, Wuhan 430074, China
Corresponding author:Li, J.(jfli0524@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:221-226
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 prediction of land use structure is the focal issue of land utilization and management. Land use structure prediction based on biodiversity conservation is vital for the areas with good bio-environment and rich species. In this study, CA-Markov was applied for modelling the biodiversity-conservation based land use structure prediction of Ledong County and related results in 2020 are obtained. The results revealed that the predicted land distribution is more reasonable than that of 2009, the layout of construction land was more agglomerative, and most of the construction land in the north areas which had the richest biodiversities has been transformed into forest, bio-resources in coastal zone have been protected while the tourism construction is developing. CA units of cultivated land were increased and the increased areas were distributed in the general biodiversity zone of the west. The simulation highlights the biodiversity protection, which is practically essential for sustainable land utilization in Ledong county.
Number of references:21
Main heading:Land use
Controlled terms:Biodiversity - Coastal zones - Conservation - Environmental protection - Forecasting - Models - Planning
Uncontrolled terms:Bio-environment - Biodiversity conservation - Biodiversity protection - CA-Markov - Construction land - Cultivated lands - Land utilization - Structure prediction - Structure-based
Classification code:403 Urban and Regional Planning and Development - 454 Environmental Engineering - 454.2 Environmental Impact and Protection - 471 Marine Science and Oceanography - 902.1 Engineering Graphics - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.04.037
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 40>
Accession number:20120914822978
Title:Changes of landscape pattern and its characteristics in Kaixian county before and after impoundment of Three Gorges Dam Project
Authors:Cui, Xiaowei (1); Zhang, Lei (2); Zhu, Liang (1); Song, Ge (2); Wu, Bingfang (1)
Author affiliation:(1) Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101, China; (2) College of Resource and Environment, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Zhang, L.(zhang@irsa.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:227-234
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 Three Gorges Project is a remarkable large-scale hydropower and water resources in the world. The project will bring great comprehensive benefits after the completion. However, as the reservoir storage completing, it also caused land cover and landscape pattern changes in this area. In order to grasp the changes of land cover and landscape pattern after the reservoir water storage, Kaixian county of Chongqing city in Three Gorges reservoir area was taken as the research object in this paper. Based on 2002, 2007 and 2010's three remote sensing image data, and using remote sensing, GIS and landscape pattern analysis techniques, the dynamic changes of land cover and landscape pattern was analyzed with the professional software such as ArcGIS9.3, Ecognition8.0 and Fragstats3.3. The results showed that Kaixian's land cover and landscape pattern changed dramatically due to the effects of reservoir storage during 2002 to 2010. The dominant types of landscape in the region were forest, bush, dry land, grassland and paddy field. On the Class Level, the area of dry land, paddy fields and grassland had decreased, and landscape had increased. While the area of forest, water, construction land had increased, and the fragmentation of the connectivity increased too. On the Landscape Level, the landscape fragmentation had increased, and landscape dominance had decreased, but the landscape diversity had increased, which was beneficial to stability of the ecosystem in the region. It showed that different characteristics of Kaixian's landscape pattern changed during 2002-2007 and 2007-2010. The results timely respond the character of land cover and landscape pattern's changes before and after impoundment. This paper provides the basis for land use of the reservoir planning and ecological landscape design.
Number of references:36
Main heading:Landforms
Controlled terms:Ecosystems - Forestry - Image reconstruction - Land use - Petroleum reservoirs - Remote sensing - Reservoirs (water) - Water resources
Uncontrolled terms:Chongqing cities - Class level - Comprehensive benefit - Construction land - Dry land - Dynamic changes - Land cover - Landscape design - Landscape diversity - Landscape fragmentation - Landscape level - Landscape pattern - Landscape pattern analysis - Landscape pattern changes - Paddy fields - Professional software - Remote sensing images - Research object - Reservoir planning - Reservoir storage - Reservoir water - Temporal and spatial variation - Three Gorges Dam - Three Gorges project - Three gorges reservoir area
Classification code:741 Light, Optics and Optical Devices - 731.1 Control Systems - 481.1 Geology - 821.0 Woodlands and Forestry - 454.3 Ecology and Ecosystems - 441.2 Reservoirs - 403 Urban and Regional Planning and Development - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.04.038
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 41>
Accession number:20120914822946
Title:Controller hardware-in-loop simulation of hydraulic mechanical transmission based on sync signal
Authors:Yang, Shujun (1); Xia, Huaicheng (1); Han, Zongqi (1); Pan, Hui (2)
Author affiliation:(1) College of Vehicles and Energy, Yanshan University, Qinhuangdao, 066004, China; (2) Liren College, Yanshan University, Qinhuangdao, 066004, China
Corresponding author:Yang, S.(ysj@ysu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:33-38
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 model of hydraulic mechanical variable transmission (HMT) is very difficult to solve the real-time because of complication including nonlinear changeover process, so it is impossible to realize controller hardware-in-loop (HIL) in real time. Controller HIL based on sync signal was proposed, the clock of the controller HIL based on sync signal and the sync signal period were defined and subsequently time sequence error of controller HIL based on sync signal was analyzed. The controller HIL simulation system of HMT was established based on controller HIL using sync signal. The simulation results of the two stages of HMT demonstrated that the control effect of the controller hardware-in-loop was approximately the same as controller model using same control strategy when the engine throttle changed.
Number of references:18
Main heading:Controllers
Controlled terms:Computer hardware - Computer simulation - Transmissions
Uncontrolled terms:Control strategies - Controller models - Hardware-in-loop - Hardware-in-loop simulation - HIL simulations - Mechanical transmission - Real time - Signal period - Sync signal - Time sequences - Two stage - Variable transmission
Classification code:602.2 Mechanical Transmissions - 722 Computer Systems and Equipment - 723.5 Computer Applications - 732.1 Control Equipment
DOI:10.3969/j.issn.1002-6819.2012.04.006
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 42>
Accession number:20120914822976
Title:Effects of alkali/alkaline earth metals on pyrolysis characteristics of cellulose
Authors:Wu, Hongxiang (1); Zhao, Zengli (1); Zhang, Wei (1); Li, Haibin (1); He, Fang (1)
Author affiliation:(1) Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy and Gas Hydrate, The New and Renewable Energy Key Laboratory of Guangdong Province, Guangzhou 510640, China
Corresponding author:Wu, H.(wuhx@ms.giec.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:215-220
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 effects of alkali and alkaline earth metals (AAEM) on the pyrolysis characteristics of biomass, microcrystalline cellulose (Mcc) loaded K, Na, Mg, Ca with different concentrations were investigated by thermogravimetric analysis and tubular furnace. The results indicated that AAEM could catalyze pyrolysis process, increase the char yields markedly, shift the pyrolysis process to lower temperature, reduce the activation energy for pyrolysis, decrease CO and C2 content and increase CO<inf>2</inf> and CH<inf>4</inf> in produced gas. The catalysis of the metal added on the cellulose was K > Na > Mg, Ca. The catalysis of metal Chloride (MCl) was relatively weak compared to CH<inf>3</inf>COOM, and the catalysis was limited when the added concentration of MCl was low. CH<inf>3</inf>COOM addition affected pyrolysis temperature and production of cellulose remarkably, separated the pyrolysis into two process, and increased H<inf>2</inf> content in produced gas. The organically bound alkali metals may catalyze pyrolysis of biomass more than the inorganically alkalis in biomass. The characteristic and production distribution of biomass pyrolysis is affected by AAEM species and forms.
Number of references:15
Main heading:Pyrolysis
Controlled terms:Activation energy - Alkaline earth metals - Biomass - Carbon dioxide - Catalysis - Cellulose - Chlorine compounds - Metals - Sodium - Thermogravimetric analysis
Uncontrolled terms:AAEM - Biomass pyrolysis - Char yield - Metal chlorides - Microcrystalline cellulose - Production distribution - Pyrolysis process - Pyrolysis temperature - Tubular furnaces
Classification code:804.2 Inorganic Compounds - 804.1 Organic Compounds - 802.2 Chemical Reactions - 801.4 Physical Chemistry - 815.1.1 Organic Polymers - 801 Chemistry - 549.1 Alkali Metals - 531 Metallurgy and Metallography - 525.1 Energy Resources and Renewable Energy Issues - 549.2 Alkaline Earth Metals
DOI:10.3969/j.issn.1002-6819.2012.04.036
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 43>
Accession number:20120914822947
Title:Dynamic characteristic analysis of boom for wide sprayer with different exciting sources
Authors:Wu, Jilin (1); Miao, Yubin (1)
Author affiliation:(1) School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
Corresponding author:Miao, Y.(ybmiao@sjtu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:39-44
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 learn boom movements under different excitation signals, the static suspension-boom models with spring-damper modular was set up in this paper based on the geometrics of a multifunctional wide sprayer worked on paddy field. The proper spring-damper parameters were obtained after the synthetical analysis of pulse response, step response and frequency response of the model in the frequency domain, dynamic simulation of the model was made under these parameters and the displacement of the tips of boom and boom suspension was observed under different excitation signals. The research showed that installation location of modular was not the prime parameter influences suspension performance, effect of rotation motion on the boom was greater than the translation motion. The model with spring-damper modular can meet the need of design requirements.
Number of references:21
Main heading:Suspensions (components)
Controlled terms:Agricultural machinery - Computer simulation - Dynamic analysis - Frequency response - Rotation - Suspensions (fluids)
Uncontrolled terms:Boom - Design requirements - Dynamic characteristic analysis - Excitation signals - Frequency domains - Paddy fields - Prime parameters - Pulse response - Rotation motions - Sprayer - Suspension performance - Synthetical analysis - Translation motion
Classification code:821.1 Agricultural Machinery and Equipment - 804 Chemical Products Generally - 731.1 Control Systems - 723.5 Computer Applications - 601.2 Machine Components - 601.1 Mechanical Devices - 422.2 Strength of Building Materials : Test Methods
DOI:10.3969/j.issn.1002-6819.2012.04.007
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 44>
Accession number:20120914822983
Title:Quantitative determination of lime additives in wheat flour by mid-infrared spectroscopy combined with attenuated total reflection
Authors:Wang, Dong (1); Wang, Jihua (1); Ma, Zhihong (2); Pan, Ligang (2); Han, Ping (2); Zhao, Liu (2)
Author affiliation:(1) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) Beijing Research Center for Agri-food Testing and Farmland Monitoring, Beijing 100097, China; (3) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, J.(wangjh@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:258-263
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:In order to meet the need of on-site quick testing lime in wheat flour, the quantitative calibration models of CaO, Ca(OH)<inf>2</inf>, CaCO<inf>3</inf>, CaO Ca(OH)<inf>2</inf> and total lime were developed by using ATR-MIR spectroscopy combined with PLS algorithm, the external validations set were employed to validate the calibration models. The result showed that for the calibration models of CaO, Ca(OH)<inf>2</inf>, CaCO<inf>3</inf>, CaO Ca(OH)<inf>2</inf> and total lime, all of the determination coefficients (R<sup>2</sup>) were larger than 0.98, all of RMSEC (root mean square error of calibration) were less than 0.3, all of RMSECV (root mean square error of cross validation) were less than 0.5, all of the RMSEP (root mean square error of prediction) were less than 0.95, all of the RPD (ratio performance deviation) were more than 4.5, precision of the calibration models were higher and they could meet the needs of on-site quick testing lime in wheat flour. It can provide a reference for the rapid quality security screening of wheat flour, which is important for the quality control of wheat flour in the market. Meanwhile, it also will provide some references to the quantitative determination of other banned additives in wheat flour.
Number of references:22
Main heading:Mean square error
Controlled terms:Additives - Calcium - Calcium carbonate - Calibration - Electromagnetic wave reflection - Infrared devices - Infrared spectroscopy - Lime - Spectroscopy - Testing
Uncontrolled terms:Attenuated total reflections - Calibration model - Cross validation - Determination coefficients - Mid-infrared spectroscopy - Midinfrared - Partial least squares - Quantitative determinations - Quick testing - Root mean square error of calibrations - Root mean square errors - Root-mean-square error of predictions - Security screening - Wheat flours
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 801 Chemistry - 804 Chemical Products Generally - 941 Acoustical and Optical Measuring Instruments - 941.4 Optical Variables Measurements - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 741.3 Optical Devices and Systems - 731.1 Control Systems - 711 Electromagnetic Waves - 549.2 Alkaline Earth Metals - 423.2 Non Mechanical Properties of Building Materials: Test Methods - 412 Concrete - 741.1 Light/Optics
DOI:10.3969/j.issn.1002-6819.2012.04.043
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 45>
Accession number:20120914822955
Title:Estimation of reference crop evapotranspiration by Chinese pan evaporation in Northwest China
Authors:Duan, Chunfeng (1); Miao, Qilong (1); Cao, Wen (1); Wang, Yong (3)
Author affiliation:(1) Jiangsu Key Lab of Agricultural Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China; (2) Anhui Climate Center, Hefei 230031, China; (3) College of Remote Sensing, Nanjing University of Information Science and Technology, Nanjing 210044, China
Corresponding author:Miao, Q.(miaoqilong@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:94-99
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:Reference crop evapotranspiration (ET<inf>ref</inf>) is a fundamental variable in the hydrological cycle. Accurate estimation of ET<inf>ref</inf> is essential to water resources project planning and farm irrigation scheduling. Based on the daily meteorological data from 123 climatic stations across Northwest China in the period of 1971-2000 and the reference crop evapotranspiration calculated by Penman-Monteith equation served as a standard, the 20 cm pan coefficient K<inf>p</inf> was estimated by relative humidity and wind speed. And K<inf>p</inf> model was respectively built and verified at different levels of single station, sub-region, and the whole study region. Results showed that there was a strong linear correlation between pan evaporation and reference crop evapotranspiration in Northwest China, and the correlation coefficients were 0.967. K<inf>p</inf> model for sub-region was more accuracy than that for the whole study region, and was more suitable than that for single station. Thus K<inf>p</inf> model for sub-region was recommend for estimating ET<inf>ref</inf> in large area.
Number of references:21
Main heading:Crops
Controlled terms:Estimation - Evaporation - Evapotranspiration - Forestry - Meteorology - Models - Phase transitions - Water supply
Uncontrolled terms:Accurate estimation - Correlation coefficient - Crop evapotranspiration - Hydrological cycles - Irrigation scheduling - Linear correlation - Meteorological data - NorthWest China - Pan coefficient - Pan evaporation - Penman-Monteith equations - Project planning - Sub-regions - Wind speed
Classification code:902.1 Engineering Graphics - 821.4 Agricultural Products - 821.0 Woodlands and Forestry - 921 Mathematics - 802.3 Chemical Operations - 446.1 Water Supply Systems - 443 Meteorology - 801.4 Physical Chemistry
DOI:10.3969/j.issn.1002-6819.2012.04.015
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 46>
Accession number:20120914822962
Title:Time effect of young shrub roots on slope protection of loess area in Northeast Qinghai-Tibetan plateau
Authors:Zhang, Xingling (1); Hu, Xiasong (2); Li, Guorong (2); Zhu, Haili (2); Mao, Xiaoqing (1); Yuan, Xiaowei (1)
Author affiliation:(1) College of Water Resources and Electric Power, Qinghai University, Xining 810016, China; (2) Department of Geological Engineering, Qinghai University, Xining 810016, China; (3) Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China
Corresponding author:Zhang, X.(xinglingzh68@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:136-141
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 study the persistence effect of plant roots in slope protection of loess area in the northeast of Qinghai-Tibetan plateau, four shrubs Atriplex canescens, Caragana korshinskii, Nitraria tangutorum, Zygophyllum xanthoxylon were planted on the slopes of the test area. Field situ pull-out test was applied to test the four shrubs with one-year growth period or four-year growth period. The result showed that during the four years, the pull-resistance, lateral root quantity of Atriplex canescens were the largest, and the root diameter of Zygophyllum xanthoxylon increased fastestly among the four shrubs; and the root diameter of Zygophyllum xanthoxylon increased faster than that of the other three shrubs during the first year, and the root diameter of Atriplex canescens increased faster than that of the other three shrubs from the second year to the fourth year. There was a power function between average root diameter and growth time for Zygophyllum xanthoxylon and Nitraria tangutorum, an exponential function for Atriplex canescens and Caragana korshinskii, a power function between average lateral root quantity and growth time for Atriplex canescens and Nitraria tangutorum, a linear function for Zygophyllum xanthoxylon and Caragana korshinskii, a power function between the average root diameter and growth time for Atriplex canescens and Nitraria tangutorum, an exponential function for Zygophyllum xanthoxylon and Nitraria tangutorum, a power function between average pull-resistance and growth time for Atriplex canescens and Caragana korshinskii, and a linear function for Zygophyllum xanthoxylon, for Nitraria tangutorum was an exponential function. The research indicated that all the four shrubs showed a powerful persistent capability in slope protection.
Number of references:28
Main heading:Exponential functions
Controlled terms:Ecosystems - Plants (botany) - Slope protection
Uncontrolled terms:Loess area - Plants - Qinghai-Tibetan plateau - Root system - Shrubs - Time effect
Classification code:454.3 Ecology and Ecosystems - 461.9 Biology - 483.1 Soils and Soil Mechanics - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.04.022
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 47>
Accession number:20120914822961
Title:Experimental research on reduction of agricultural non-point source pollution using pond wetland
Authors:Pan, Le (1); Mao, Zhi (1); Dong, Bin (1); Gao, Xuerui (1)
Author affiliation:(1) State Key Laboratory of Water Resources and Hydropower Science, Wuhan University, Wuhan 430072, China
Corresponding author:Mao, Z.(maozhi@whu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:130-135
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 removal effect and laws of nitrogen and phosphorus pollutants drainaged form farmland by pond wetland, a typical pond was selected and transformed in Zhanghe irrigation district, Hubei province. Water samples of nitrogen and phosphorus form the pond were collected for analysis during the whole growing season of rice from May to September in 2009. The results showed that the average removal rate of total nitrogen, total phosphorus with typical pond wetland were 45.88% and 44.20% respectively, high efficiency in pollutant removal was obtained. Comparative experiment of three processing units showed that the units which optimized plant density, the ability of removing nitrogen increased significantly, wetland plants absorbed nitrogen was the important way to remove nitrogen. Compared with unit II (sediment of wetland was dregdged, it was backfilled with new sediment and planting density was readjusted), the effect of removing phosphorus by unit III (planting density in wetland was optimized) was better, phosphorus was adsorbed by sediment play an important role in removing phosphorus in wetland, which provided valuable reference for the study of wetland in future.
Number of references:22
Main heading:Wetlands
Controlled terms:Anoxic sediments - Lakes - Nitrogen - Nitrogen removal - Optimization - Phosphorus - Pollution - Sedimentology
Uncontrolled terms:Comparative experiments - Experimental research - Growing season - Hubei Province - Irrigation districts - Non-point source pollution - Phosphorus form - Plant densities - Planting density - Pollutant removal - Pond - Processing units - Removal rate - Total nitrogen - Total phosphorus - Water samples - Wetland plants
Classification code:921.5 Optimization Techniques - 804 Chemical Products Generally - 802.2 Chemical Reactions - 483 Soil Mechanics and Foundations - 481.1 Geology - 454.2 Environmental Impact and Protection - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2012.04.021
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 48>
Accession number:20120914822941
Title:Study status and developmental strategies of mechanical pollination for hybrid rice breeding
Authors:Tang, Chuzhou (1); Wang, Huimin (1); Li, Ming (1); Li, Zhongqiu (1); Huang, Zhen (1); Luo, Haifeng (1); Jan, Min (3); Zhang, Haiqing (1)
Author affiliation:(1) College of Engineering Hunan Agricultural University, Changsha 410128, China; (2) Hunan Provincial Engineering Technology Research Center for Modern Agricultural Equipment, Changsha 410128, China; (3) Long Ping High-tech Co. Ltd, Changsha 410000, China
Corresponding author:Wang, H.(whm19860603wyhj@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:4
Issue date:February 15, 2012
Publication year:2012
Pages:1-7
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:Breeding is an important process of hybrid rice production. Pollination is the key link of breeding, which effect the production and economical efficiency obviously. The status of pollination equipments and technologies at home and abroad were reviewed. There were two types of pollination techniques with collision type and slipstream type based on the working principle, the features and the shortcomings of which were summarized. The problems of pollination equipment, such as pollination nonuniformity, plant scathing, resulted into pollinating blindly and randomly. Hybrid rice production should be oriented toward mechanization and multifunction. The strategies of different kinds of pollinating scientifically and applicatively, and the methods of obtaining reasonable working parameters and avoiding interbreeding and developing applicable pollination machines were explored.
Number of references:48
Main heading:Machinery
Controlled terms:Agricultural engineering - Agriculture - Crops - Reviews
Uncontrolled terms:Breeding - Hybrid rice - Mchinery - Mechanical pollination - Pollination
Classification code:601 Mechanical Design - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 903.2 Information Dissemination
DOI:10.3969/j.issn.1002-6819.2012.04.001
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
期刊信息
- 主管单位 中国科学技术协会
- 主办单位 中国农业工程学会
- 主编 朱明
- 总编/社长 王应宽
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- Bioresource Technology
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- Biomass & Bioenergy
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- Aquacultural Engineering
- International Journal of Agricultural and Biological Engineering
- Journal of Irrigation and Drainage Engineering
- Paddy and Water Environment
- Journal of Agricultural Engineering
- Transactions of the ASABE
- Revista Brasileira de Engenharia Agricola e Ambiental
- Applied Engineering in Agriculture
- Engenharia Agricola
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