<RECORD 1>

Accession number:20111013735489Title:Automatic measurement and quantitative characteristics of rice viscosity
Authors:Gao, Yuan (1); Zhou, Jiping (2); Wei, Xiaobin (2); Jiang, Nan (2); Dai, Qigen (1)
Author affiliation:(1) Agricultural College of Yangzhou University, Yangzhou 225009, China; (2) College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China
Corresponding author:Zhou, J.
      (jpzhou@yzu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:358-362
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 existing methods and techniques of rice viscosity measurement were analyzed and the mechanism in measuring rice viscosity based on material characteristics was investigated in this paper. Then, an automatic system for measuring viscosity of cooked rice was developed and quantitative characteristics used to express rice viscosity by the average slope of unloading distortion curve were established. Results showed that the system could distinguish the viscosity difference between rice varieties and detect the change of rice viscosity with cooking time for the same variety. Therefore, this system can meet the requirements in assessing and evaluating rice viscosity, which is an important factor for cooked rice quality, and provide a convenient and accurate way for rice quality measurement.
Number of references:15
Main heading:Viscosity
Controlled terms:Automatic testing - Unloading - Viscometers - Viscosity measurement
Uncontrolled terms:Automatic measurements - Automatic systems - Cooked rice - Cooking time - Existing method - Material characteristics - Quality measurements - Quantitative characteristics - Taste control
Classification code:422 Strength of Building Materials; Test Equipment and Methods - 423 Non Mechanical Properties and Tests of Building Materials - 631.1 Fluid Flow, General - 674.1 Small Marine Craft - 943.3 Special Purpose Instruments
DOI:10.3969/j.issn.1002-6819.2010.12.060
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 2>

Accession number:20111013735439Title:Fast method for estimating soil infiltrability with modified Green-Ampt model
Authors:Mao, Lili (1); Lei, Tingwu (1)
Author affiliation:(1) College of Hydraulic and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China
Corresponding author:Lei, T.
      (ddragon@public3.bta.net.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:53-57
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 quantify the soil infiltrability is of great importance for the study of the hydrological process and related researches and applications. A fast method for estimating soil infiltrability was proposed in this study based on the horizontal soil column measurement method and the modified Green-Ampt model according to the proportional relationship between the soil infiltrability estimated with the piston model and that calculated with the modified Green-Ampt one. The newly introduced fast model for estimating soil infiltrability was the simplification of the modified Green-Ampt infiltration model with relatively high accuracy. Comparisons were made among the results estimated with the three calculation models, which were the piston model, the modified Green-Ampt model and the fast estimation model. The results showed that the soil infiltrability estimated with the fast estimation model was very close to that calculated with the modified Green-Ampt model. The relative errors of these three methods were calculated based on the mass balance principle which were 11.5% for the piston model, 0.66% for the modified Green-Ampt model and 2.68% for the fast estimation model. The fast estimation method introduced in this study, combined with the horizontal soil column measurement method is applicable to laboratory studies of soil infiltrability. This method supplies a useful tool for the study of hydrologic circulation/overland flow and other relative fields.
Number of references:23
Main heading:Geologic models
Controlled terms:Estimation - Moisture determination - Seepage - Soil mechanics - Soil moisture - Soil surveys
Uncontrolled terms:Calculation models - Fast estimation - Fast methods - FAST model - Green-Ampt - Green-Ampt infiltration - Green-Ampt model - Horizontal soil column - Hydrological process - Laboratory studies  - Mass balance - Modified model - Relative errors - Soil column
Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 441 Dams and Reservoirs; Hydro Development - 481.1 Geology - 483.1 Soils and Soil Mechanics - 921 Mathematics - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2010.12.009
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 3>

Accession number:20111013735456Title:Effects of combing ridge and no-tillage on aggregates and organic matter in a rice-based cropping system
Authors:Yuan, Junji (1); Peng, Sili (1); Jiang, Xianjun (1); Xie, Deti (1)
Author affiliation:(1) College of Resource and Environment, Southwest University, Chongqing 400716, China
Corresponding author:Jiang, X.
      (jiangxianjun@swu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:153-160
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this study the effects of tillage methods (flooded paddy field, FPF; conventional paddy-upland rotation tillage, CR; combing ridge with no-tillage, RNT) on soil aggregates as well as on the soil organic matter (SOM) fractions protected by soil aggregates were investigated in a long-term experimental site established in 1990, Chongqing City, China. The results showed that compared with FPF and CR, RNT reduced the disruption of macro-aggregates. In 0-10 cm layer, the content of macro-aggregates in RNT was 1.48 and 1.32 times greater than that in FPF and CR, respectively, while the content of micro-aggregates decreased in RNT, and there was a similar trend in &gt;10-20 cm layer. Under these three tillage methods, the distribution pattern of soil organic carbon (SOC) and soil organic nitrogen (SON) in aggregates were similar, and both of them had an enrichment trend to macro-aggregates, but concentration of SOC and SON was significantly higher under RNT than that in FPF and CR. The results of particulate organic matter (POM) showed that the amount of light fraction (LF) had no significant difference between RNT (1.92 g/kg) and CR (1.70 g/kg), but they were both higher than that in FPF (1.42 g/kg). Total intro-particulate organic matter (iPOM) concentration in FPF, CR, and RNT was 0.96, 1.12, and 2.14 g/kg, respectively. The level of fine iPOM in RNT was 3.06 and 2.46 times greater than that in FPF and CR, which accounted for 57% of the difference in total POM between RNT and FPF (66%, CR). The amount of coarse iPOM was only 1.56 and 1.40 times greater than that in FPF and CR, which accounted for only 18% and 19% of the difference in total POM. Though there was a similar trend in &gt;10-20 cm layer, the difference of coarse iPOM held more share of the difference in total POM than that in 0-10 cm layer. In conclusion, RNT reduced macro-aggregates breakdown, and improved the formation of aggregates from micro-aggregates, which decreased the turnover rate of soil aggregates, favored the sequestration of fine iPOM and promoted the purple paddy soil ability to fix and accumulate carbon.
Number of references:34
Main heading:Soil pollution
Controlled terms:Aggregates - Agricultural machinery - Agriculture - Biogeochemistry - Biological materials - Organic carbon - Soils
Uncontrolled terms:Carbon sequestration - Chongqing cities - Cropping systems - Distribution patterns - Light fraction - Microaggregates - No tillage - Organic matter - Organic nitrogen - Paddy fields  - Paddy soils - Particulate organic matter - Particulate organic matters - Soil aggregate - Soil organic carbon - Soil organic matters - Tillage method - Tillage methods - Turnover rate
Classification code:821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 483.1 Soils and Soil Mechanics - 481.2 Geochemistry - 461.2 Biological Materials and Tissue Engineering - 406 Highway Engineering
DOI:10.3969/j.issn.1002-6819.2010.12.026
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 4>

Accession number:20111013735487Title:Method and empirical research on the realization degree of arable land production capacity at town level
Authors:Kong, Xiangbin (1); Li, Cuizhen (2); Zhao, Jing (1); Wang, Hongyu (1); Tan, Min (3); Li, Tao (1); Zhang, Qingpu (1)
Author affiliation:(1) Department of Land Resource and management, China Agricultural University, Beijing 100193, China; (2) School of Public Administration, Zhejiang Gongshang University, Hangzhou 310018, China; (3) College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha 410128, China
Corresponding author:Kong, X.
      (kxb@cau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:345-351
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This paper brought out the calculation method for the arable land production capacity realization degree at town level, and Daxing district area was taken as the case study to certify the method validation. The arable land production capacity realization degree was divided into three parts including the crop yield realization degree for both wheat and maize, crop sown area realization degree and the total grain productivity realization degree. The calculation of the available crop yield is the key to the arable land production capacity. The main methods including frontier production function, regional test yield, and the highest appointed productivity in the recent five years were introduced to achieve the available yield per hectare at regional scale, and the crop available yield per hectare based on AEZ method at plot scale was acted as the auxiliary method. The finial crop available yield per hectare at town scale was determined by up-down scale and down-up scale methods. Realization degree of arable land production capacity at town level in three times including 1982, 2000, and 2006 was analyzed. The results showed that: the realization degree of the arable land production capacity at region scale was the highest in 1982, the lowest in 2006 and middle in 2000. In addition, the realization degrees of arable land production capacity at town scale were the highest in 1982, but decreased sharply in 2000 compared with the year of 1982. The realization degrees in 2006 were higher than that in 2000, but still lower than that in 1982. There were spatial and temporal variations for the realization degrees of arable land production capacity at town scale, however, the most importantly was the same changing tendency of the realization degree of arable land production capacity at both county and town scale across Daxing county in three periods. This method can provide a reference for the calculation of the realization degree of arable land production capacity at large scale.
Number of references:22
Main heading:Land use
Controlled terms:Crops - Economics - Productivity
Uncontrolled terms:Arable land - Calculation methods - Crop yield - Empirical research - Frontier production - Method validations - Production capacity - Regional scale - Scale - Scale method  - Spatial and temporal variation - Yield
Classification code:403 Urban and Regional Planning and Development - 821.4 Agricultural Products - 913.1 Production Engineering - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2010.12.058
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 5>

Accession number:20111013735452Title:Development of test system for rice shape property parameters
Authors:Wu, Caizhang (1); Bu, Dongwei (1)
Author affiliation:(1) College of Electrical Engineering, Henan University of Technology, Zhengzhou 450007, China
Corresponding author:Bu, D.
      (bdw110@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:131-135
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 test the quality parameters of high-quality rice, this paper presented a method for testing the rice shape parameters based on embedded system. The equipment used for capturing the image of rice was designed. The hardware platform of the system was S3C2410 with ARM core, and its software development platform was Linux system. A USB digital camera was used, and the technology of image processing and pattern recognition was applied. The threshold segmenting image was completed by using OTSU method. The edge detection method and the maximum distance method were employed to obtain the shape parameters of rice. The testing error was less than 1%. This system lays foundation for the field measurements of national standard rice parameters.
Number of references:16
Main heading:Parameter estimation
Controlled terms:Cameras - Computer operating systems - Edge detection - Image processing - Imaging systems - Software design
Uncontrolled terms:Edge detection methods - Field measurement - Hardware platform - High quality - Linux - Linux systems - Maximum distance - National standard - OTSU method - Quality parameters  - Rice shape - S3C2410 - Shape parameters - Shape property - Software development - Test systems - Testing errors
Classification code:746 Imaging Techniques - 742.2 Photographic Equipment - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment - 716 Telecommunication; Radar, Radio and Television
DOI:10.3969/j.issn.1002-6819.2010.12.022
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 6>

Accession number:20111013735493Title:Effects of different inactivation treatment on oat flavor and quality
Authors:Cao, Ruge (1); Lin, Qin (2); Ren, Changzhong (3); Li, Zaigui (1)
Author affiliation:(1) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (2) College of Flavor Technology and Engineering, Shanghai Institute of Technology, Shanghai 200235, China; (3) Oat Engineering Centre, Baicheng Academy of Agricultural Sciences, Jilin Baicheng 137000, China
Corresponding author:Li, Z.
      (lizgcau@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:378-382
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 choose the appropriate inactivation method, the effects of different enzyme inactivation treatments, which including hot air roasting, normal-pressure steaming, high-pressure steaming, infrared toasting and microwave heating, on flavor, whiteness, and pasting characteristics of oat flour were studied by electronic nose, sensory evaluation and rapid viscosity analysis. The results showed that PCA fingerprints of electronic nose distinguished different oat flour groups clearly from both two-dimensional and three-dimensional perspective. Sensory evaluation showed that the value of flavor followed the order from high to low: hot air roasting, infrared toasting, high-pressure steaming, normal-pressure steaming, and microwave heating. Whiteness measured by colormeter showed that with microwave treatment was the best, followed by infrared toasting, hot air roasting, high-pressure and normal-pressure steaming, respectively, which was generally in accordance with the results of sensory evaluation. Except pasting temperature, others of six rapid visco-analyser (RVA) characteristics were significantly different from each other. It was concluded that different enzyme inactivation treatments had quite different effects on oat flavor, color and starch gelatinization. According to different use, different inactivation methods should be chosen appropriately.
Number of references:15
Main heading:High pressure effects
Controlled terms:Artificial organs - Calcination - Color - Enzymes - Experiments - Gelation - Heating - Microwave heating - Principal component analysis
Uncontrolled terms:Electronic nose - Gelatinization - Oat - Sensory evaluation - Whiteness
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 901.3 Engineering Research - 804.1 Organic Compounds - 802.3 Chemical Operations - 741.1 Light/Optics - 711.1 Electromagnetic Waves in Different Media - 643.1 Space Heating - 462.4 Prosthetics
DOI:10.3969/j.issn.1002-6819.2010.12.064
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 7>

Accession number:20111013735463Title:Crop precision fertilization model based on improved BP neural network ensemble
Authors:Yu, Helong (1); Zhao, Xinzi (2); Chen, Guifen (1); Wan, Baocheng (1); Gao, Jie (1)
Author affiliation:(1) College of Information Technology, Jilin Agricultural University, Changchun 130118, China; (2) Jilin Province Agricultural Machinery Administration Station, Changchun 130062, China
Corresponding author:Chen, G.
      (guifchen@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:193-198
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:There exists obvious nonlinear relation between the optimal fertilization rate and soil and yield. In order to simulate this relation more accurately, a novel neural network ensemble method was proposed, where the K-means clustering was used to select better network individuals and Lagrange multiplier was used to compute the weight of network individuals. Based on the fertilizer effect data in the experimental field, taking soil nutrient and fertilization rate as inputs and taking yield as output, a crop precision fertilization model was constructed. By solving a nonlinear programming problem, both the maximum yield and the optimal fertilization rate were achieved. The results showed that the simulation error of the fertilization model based on neural network ensemble (root mean square error was 64.54) was much less than that of the fertilization model based on individual neural network (root mean square error was 169.74). Also, as a quantitative model, it is better than the traditional fertilization models and can be used to guide precision fertilization effectively.
Number of references:15
Main heading:Neural networks
Controlled terms:Backpropagation - Computer simulation - Crops - Geologic models - Lagrange multipliers - Mean square error - Nonlinear programming - Optimization
Uncontrolled terms:Fertilization model - Fertilization rates - Improved BP neural network - K-means clustering - Model-based - Neural network ensembles - Nonlinear programming problem - Nonlinear relations - Novel neural network - Precision agriculture  - Quantitative models - Root mean square errors - Simulation error - Soil nutrients
Classification code:921.5 Optimization Techniques - 921 Mathematics - 821.4 Agricultural Products - 731.1 Control Systems - 723.5 Computer Applications - 723.4 Artificial Intelligence - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2010.12.033
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 8>

Accession number:20111013735451Title:Experiments on design parameters of stripping header for super rice in cold region
Authors:Han, Bao (1); Wu, Wenfu (2); Huang, Xinguo (1)
Author affiliation:(1) Engineering College, Northeast Agricultural University, Harbin 150030, China; (2) Bio-Agriculture Engineering College, Jilin University, Changchun 130025, China
Corresponding author:Han, B.
      (hanbao2004@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:125-130
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To further improve the operating function and reduce stripping losses of stripping header for harvesting pre-frost super rice in cold region, through analysis on the main parameters and characteristics of structure which influence the working performance of stripping header, a new stripping header, which was changeable for three types of cylinder, was designed based on the 4ZTL-1800 type stripper harvester with air suction for rice and wheat. Single factor and multi-factors orthogonal experiments were carried out, which selected linear velocity of stripping rotor with triangle plate teeth, feeding velocity, inlet opening size and air-flow velocity as experimental factors, and post harvest loss rate of grain (scattering loss, loss of grain in straw and un-threshed loss) were took as judging indexes. The single factor experiments showed that the post harvest loss rate of grain was remarkably influenced by linear velocity of stripping rotor, feeding velocity and air-flow velocity. Furthermore, the orthogonal experiment indicated that the best scheme was the linear velocity of stripping rotor as 23 m/s, feeding speed as 1.1 m/s, inlet air-flow velocity as 14 m/s and inlet opening size as 120 mm, and the post harvest loss rate was lower than 1% under this condition. The stripping header can meet the requirements of stripping harvest for super rice, and provide basis for the design of the stripping header of stripper harvester.
Number of references:15
Main heading:Stripping (dyes)
Controlled terms:Cold heading - Cylinders (shapes) - Experiments - Feeding - Flow velocity - Grain (agricultural product) - Harvesters - Harvesting - Inlet flow - Metal working  - Optimization - Rotors - Velocity
Uncontrolled terms:Air flow - Air suction - Cold regions - Design parameters - Experimental factors - Feeding speed - Inlet air - Linear velocity - Main parameters - Multi factors  - Opening sizes - Operating functions - Orthogonal experiment - Post-harvest loss - Scattering loss - Stripping harvester - Stripping header - Super rice
Classification code:931.1 Mechanics - 921.5 Optimization Techniques - 901.3 Engineering Research - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 803 Chemical Agents and Basic Industrial Chemicals - 691.2 Materials Handling Methods - 631.1 Fluid Flow, General - 631 Fluid Flow - 601.2 Machine Components - 535.2.2 Metal Forming Practice - 408.2 Structural Members and Shapes
DOI:10.3969/j.issn.1002-6819.2010.12.021
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 9>

Accession number:20111013735461Title:Short-term wind power forecasting based on an improved persistence approach
Authors:Li, Li (1); Ye, Lin (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Ye, L.
      (yl@cau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:182-187
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Wind power forecasting is of importance for power grids. It can mitigate the disadvantageous impacts of wind farms on power systems and enhance the competitiveness of wind power in electricity markets. This paper proposed an improved persistence approach based on wavelet. First, the original data of wind speeds were decomposed into high-frequency component and low-frequency component by using wavelet. Moving average method was used for predicting the high-frequency subseries, in terms of low similarity and easy fluctuation properties in high-frequency component, and the low-frequency sub-series were still predicted by the persistence method. Then, all sub-series were recomposed to form a time series of wind speeds. Wind power of a wind turbine can be further forecasted through a power curve which could transfer wind speeds data into wind power. Compared with the original method, the average relative error reduced to 11.81% from 17.10%, and the average absolute error decreased to 23.48 kW from 39.58 kW. Case study showed that the wind power forecasting accuracy was effectively improved by use of an improved persistence approach which could be put into operation in practice.
Number of references:20
Main heading:Wind power
Controlled terms:Competition - Electric utilities - Forecasting - Time series - Wavelet analysis
Uncontrolled terms:Average absolute error - Average relative error - Electricity market - Fluctuation properties - High frequency components - High frequency HF - Low frequency - Low-frequency components - Moving average method - Moving averages  - Persistence approach - Power curve - Power curves - Power grids - Power systems - Similarity - Wind farm - Wind power forecasting - Wind speed
Classification code:615.8 Wind Power (Before 1993, use code 611 ) - 706 Electric Transmission and Distribution - 911.2 Industrial Economics - 921 Mathematics - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2010.12.031
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 10>

Accession number:20111013735482Title:Comprehensive assessment methodology of soil quality under different land use conditions
Authors:Zhang, Wangshou (1); Li, Xiaoxiu (2); Huang, Wenjiang (1); Li, Jianhui (2); Ren, Wanping (2); Gao, Zhongling (1)
Author affiliation:(1) National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) College of Resource Environment and Tourism, Capital Normal University, Beijing 100037, China
Corresponding author:Huang, W.
      (huangwj@nercita.org.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:311-318
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:As traditional method of soil quality assessment cannot meet the need of modern agricultural development, the paper brings forward a comprehensive evaluation method of soil quality: Soil quality index (SQI), in order to provide theoretical support and reference for agricultural production, field selection of farmland and the protection of agriculture environmental. This method had been applied to the soil of seven patterns of land-use (grain fields, woodlands, wetlands, wasteland, orchard, vegetable garden, lawn) in Beijing suburbs, and was compared with the conventional methods. The results showed that the soil fertility assessed by Fuzzy membership function model was ranked as follows: wetland&gt;vegetable garden&gt;grain crop fields&gt;forest land&gt;orchard&gt;wasteland&gt;grassland. The soil environment quality was assessed by single factor pollution index and Nemerow indices of heavy metal, the contamination index in the order: wetland&gt;vegetable garden&gt;wasteland&gt;orchard&gt;forest land&gt;grain crop fields&gt;grassland. The comprehensive quality of soil which was evaluated by SQI, ranked as follows: wetland&gt;grain crop fields&gt;vegetable garden&gt;orchard&gt;forest land&gt;wasteland&gt;grassland. In addition, some significant topics were discussed such as model scope, division of evaluation results, etc. It was concluded that SQI model not only can be applied to different land-use types, but also reflects the spatial variability of soil properties and soil critical information, e.g. fertility and pollution. It can achieve qualitative and quantitative analysis of soil comprehensive quality, and meet the needs of agricultural production.
Number of references:26
Main heading:Soil pollution
Controlled terms:Crops - Environmental protection - Forestry - Geologic models - Grain (agricultural product) - Heavy metals - Land use - Membership functions - Metal testing - Orchards  - Quality assurance - Quality control - Rating - Soil testing - Soils - Sustainable development - Vegetables - Wetlands
Uncontrolled terms:Agricultural development - Agricultural productions - Comprehensive assessment - Comprehensive evaluation - Comprehensive qualities - Contamination index - Conventional methods - Critical information - Evaluation Method - Evaluation results  - Fertility - Forest land - Fuzzy membership function - Grain crops - Pollution index - Qualitative and quantitative analysis - Soil environment - Soil fertility - Soil quality - Soil quality index  - Soil quality index (SQI) - Spatial variability of soil properties
Classification code:913.3 Quality Assurance and Control - 911.2 Industrial Economics - 902.2 Codes and Standards - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics - 531 Metallurgy and Metallography - 481.1 Geology - 454.2 Environmental Impact and Protection - 403 Urban and Regional Planning and Development - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2010.12.053
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 11>

Accession number:20111013735462Title:In-situ crop hyperspectral acquiring and spectral features analysis based on pushbroom imaging spectrometer
Authors:Zhang, Dongyan (1); Huang, Wenjiang (1); Wang, Jihua (1); Yang, Guijun (1); Zhu, Dazhou (1); Liu, Rongyuan (1); Ma, Zhihong (1)
Author affiliation:(1) National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) Institution of Remote Sensing and Information Technique, Zhejiang University, Hangzhou 310029, China
Corresponding author:Huang, W.
      (huangwj@nercita.org.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:188-192
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 validate the feasibility of self-developed pushbroom imaging spectrometer (PIS) for near ground application, PIS was used to acquire the hyperspectral information of wheat and corn at canopy and leaf scales. The hyperspectral data were collected from field and laboratory respectively and were compared with each other, and the affect factors that appeared in the collection of PIS imaging were also analyzed. In addition, the hyperspectral images were compared with the spectra that obtained from classical field spectroradiometers (ASD Fieldspec FR2500, ASD). The results showed that PIS data had good consistency with ASD data, and PIS could accurately obtain spectral information of crops. Due to the influence of the absorption of oxygen, the spectra obtained by PIS had disturbance absorption at 760 nm. Meanwhile, PIS could not only analyze the effect degree of weed and soil background for crop canopy spectra, but also extract spectral differences among leaves from different layers and organs. These preliminary results provide a foundation for further application of PIS on monitoring crop growth status.
Number of references:20
Main heading:Spectrometry
Controlled terms:Absorption - Crops - Feature extraction - Oxygen - Spacecraft instruments - Spectrometers
Uncontrolled terms:Classical fields - Corn - Crop canopy - Crop growth - Hyper-spectral images - HyperSpectral - Hyperspectral Data - Hyperspectral information - In-situ - Pushbroom Imaging Spectrometer  - Spectral differences - Spectral feature - Spectral information - Wheat
Classification code:655.1 Spacecraft, General - 716 Telecommunication; Radar, Radio and Television - 801 Chemistry - 804 Chemical Products Generally - 821.4 Agricultural Products - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2010.12.032
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 12>

Accession number:20111113736084Title:Determination of wheat canopy nitrogen content ratio by hyperspectral technology based on wavelet denoising and support vector regression
Authors:Liang, Liang (1); Yang, Minhua (1); Zang, Zhuo (3)
Author affiliation:(1) School of Geosciences and Info-Physics, Central South University, Changsha 4100831, China; (2) School of Architecture and Urban Planning, Hunan University of Science and Technology, Xiangtan 411201, China; (3) Research Center of Forestry Remote Sensing and Information Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Corresponding author:Yang, M.
      (yangmhua@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
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 model of wheat canopy nitrogen content ratio determination using hyperspectral reflectance spectra, the optimal parameter combination of wavelet denoising was selected through orthogonal test (wavelet function: haar; decomposition level: 5; threshold option scheme: fixed form threshold; noise structure: unscaled white noise), and the partial least square (PLS) models were established with the denoising spectra of wheat canopy to compare the results of different pretreatment methods. It was found that the pretreatment method of wavelet denoising combined with first derivative could eliminate the background information of the original spectra most effectively, with root mean square error of calibration set (RMSEC) 0.260 and root mean square error of prediction set (RMSEP) 0.288, respectively. Then the pretreated spectra was analyzed using principal component analysis (PCA), and the top 6 principal components were used as the input variables for the least square support vector regression (LS-SVR) modeling. The RMSEC and RMSEP of LS-SVR model were 0.154 and 0.259, respectively, lower than that of PLS model, which indicated the LS-SVR model was more accurate. The results suggest that it is feasible to improve the accuracy of the model by eliminating the soil background information of original spectra with the pretreatment method of wavelet denoising combined with first derivative, and the LS-SVR algorithm is a preferred method of modeling.
Number of references:21
Main heading:Principal component analysis
Controlled terms:Crops - Geologic models - Least squares approximations - Mean square error - Nitrogen - Noise pollution control - Orthogonal functions - Regression analysis - Vectors - Wavelet analysis  - Wavelet decomposition - White noise
Uncontrolled terms:Background information - De-noising - Decomposition level - First derivative - HyperSpectral - Hyperspectral reflectance - Input variables - Least square support vector regressions - Method of modeling - Nitrogen content  - Noise structures - Optimal parameter combinations - Orthogonal test - Partial least square (PLS) - Partial least squares - PLS models - Pretreatment methods - Principal Components - Root mean square error of calibrations - Root-mean-square error of predictions  - Support vector regression (SVR) - Support vector regressions - Technology-based - Wavelet denoising - Wavelet function - Wheat canopy
Classification code:922.2 Mathematical Statistics - 921 Mathematics - 821.4 Agricultural Products - 804 Chemical Products Generally - 711 Electromagnetic Waves - 481.1 Geology - 461.7 Health Care
DOI:10.3969/j.issn.1002-6819.2010.12.042
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 13>

Accession number:20111013735470Title:Soil sampling method based on field measurements and remote sensing images
Authors:Quan, Quan (1); Xie, Jiancang (1); Shen, Bing (1); Luo, Wan (1)
Author affiliation:(1) Northwest Key Laboratory of Water Resource and Environment Ecology, Xi'an University of Technology, Xi'an 710048, China
Corresponding author:Quan, Q.
      (qq@mail.xaut.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:237-241
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Seeking a representative and economical soil sampling solution that combines soil properties with advanced technologies has been a difficult task in soil related studies. A new method for soil sampling was presented based on measured soil moisture and salinity data, remote sensing images and analysis of spatial distributions of soil properties in Lubotan land reclamation area in Shaanxi, China. The results showed that with the available data sets of 33 points, up to 101 unknown points could be estimated, and further interpolation of 343 points displayed spatial distribution of soil salinity in the study area. The coefficients of determination (R²) for the predicted soil moisture and soil salinity were 0.867 and 0.817, respectively. Furthermore, Kriging analysis for top soil salinity distribution in the study area showed that soil salinity had a medium degree of autocorrelation and low variability. This study may provide timely understanding of soil reclamation efforts and local water management practice.
Number of references:15
Main heading:Soil surveys
Controlled terms:Image reconstruction - Interpolation - Land reclamation - Moisture determination - Remote sensing - Salinity measurement - Soil moisture - Spatial distribution - Volume control (spatial) - Wastewater reclamation  - Water management
Uncontrolled terms:Advanced technology - Data sets - Field measurement - Kriging analysis - Lubotan - Management practices - Remote sensing images - Shaanxi Province - Soil property - Soil salinity  - Soil sampling - Spatial variables - Study areas - Top soils
Classification code:944.2 Moisture Measurements - 921.6 Numerical Methods - 921 Mathematics - 741 Light, Optics and Optical Devices - 731.3 Specific Variables Control - 731.1 Control Systems - 483.1 Soils and Soil Mechanics - 452.4 Industrial Wastes Treatment and Disposal - 446 Waterworks - 444 Water Resources - 442.2 Land Reclamation
DOI:10.3969/j.issn.1002-6819.2010.12.040
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 14>

Accession number:20111013735485Title:Effects of DEM grid resolution on quantitative soil-landscape model at hilly and mountain area
Authors:Guo, Pengtao (1); Wu, Wei (2); Liu, Hongbin (1); Xie, Deti (1); Li, Maofen (1)
Author affiliation:(1) College of Resources and Environment, Southwest University, Beibei 400716, China; (2) College of Computer and Information Science, Southwest University, Beibei 400716, China; (3) Chongqing Key Laboratory of Digital Agriculture, Beibei 400716, China
Corresponding author:Liu, H.
      (lhbin@swu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:330-336
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 effect of digital elevation model (DEM) resolutions on soil-landscape model prediciton accuracy was evaluated by comparing five DEMs (2.5, 5, 10, 20, and 30 m) for a 4.8 km² watershed in Chongqing. A set of soil-landscape models between soil property and terrain attributes were generated using mutiple stepwise regression. The results showed that the DEM grid resolution had significant effects on the terrain attributes. The mean of specific catchment area and topographic wetness index increased with the decrease of the grid resolution, while the mean of slope and the range of plan curvature and profile curvature decreased with the decrease of the grid resolution. The prediction accuracy of the soil-landscape models was subsequently influenced by the DEM resolutions. The determination coefficient significantly decreased while the mean absolute error and root mean square error remarkably increased when the grid size was lower than 5 m.
Number of references:21
Main heading:Geologic models
Controlled terms:Catchments - Forestry - Geomorphology - Landforms - Runoff - Soils - Surveying
Uncontrolled terms:Catchment area - Chongqing - Determination coefficients - Digital elevation - Digital elevation model - Grid resolution - Grid size - Mean absolute error - Prediction accuracy - Root mean square errors  - Soil property - Soil-landscape models - Specific catchment area - Stepwise regression - Terrain attributes - Topographic wetness index
Classification code:821.0 Woodlands and Forestry - 483.1 Soils and Soil Mechanics - 481.1.1 Geomorphology - 481.1 Geology - 444.1 Surface Water - 444 Water Resources - 405.3 Surveying
DOI:10.3969/j.issn.1002-6819.2010.12.056
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 15>

Accession number:20111013735448Title:Mechanism and methodology for monitoring tomato water content based on stem diameter variation
Authors:Wang, Xiaosen (1); Meng, Zhaojiang (1); Duan, Aiwang (1); Liu, Zugui (1)
Author affiliation:(1) Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China; (2) Key Laboratory for Crop Water Requirement and Regulation, Ministry of Agriculture, Xinxiang 453003, China
Corresponding author:Meng, Z.
      (zjmeng5@tom.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:107-113
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:Through tomato planted in barrels and plots in spring greenhouse, some experiments were carried out, which including the mechanism and law of tomato stem diameter variation, the influences of exterior environmental factors on its stem diameter variation, the way of eliminating meteorologic factors disturbances on observed Maximum Daily Shrinkage (MDS), in order to provide theoretical and practical basis for the technology of monitoring crop water content and automatic irrigation system based on crop stem diameter variation. The results showed that the stem diameter variation of tomato lagged the leaf water potential variation for 1-1.5 h, but they had better correlation. The shrinkage process of tomato stem was consisted of synchronous shrinkages of xylem and phloem, but the xylem recovered its size sooner than phloem did in its recovery process. The daily transpiration intensity in tomato fruit period was bigger than that in its flower and fruit period, which caused the daily minimum stem diameter in fruit period occurred latter than that in flower and fruit period, and the critical stomata conductance values of stem recovery in fruit period was smaller than that in flower and fruit period too. Furthermore, the variation of tomato MDS shared the same trend with the daily average radiation, but its values scopes were regulated by soil water content. With the decrease of soil water content from field water capacity (FWC) to 50% relative soil water content, and the value of MDS got bigger. The MDS could reveal the difference of soil water content obviously in sun day, but the value of MDS got smaller along with the decrease of soil water content on the contrary with the condition of relative soil water content below 50%. In addition, through statistical analysis, the RMDS which was the value of MDS/MDS^* could eliminate the disturbances of meteorologic factors on observed MDS and reflect soil water content stably.
Number of references:13
Main heading:Water content
Controlled terms:Crops - Environmental regulations - Fruits - Greenhouses - Irrigation - Recovery - Shrinkage - Soil moisture
Uncontrolled terms:Automatic irrigation systems - Conductance values - Environmental factors - Leaf water potential - MDS - Meteorologic factors - Recovery process - Soil water content - Statistical analysis - Stem diameter  - Stem diameter variation - Tomato - Tomato fruits - Water capacity
Classification code:444 Water Resources - 454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2010.12.018
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 16>

Accession number:20111013735454Title:Modeling and analysis on extruding force in pelleting process
Authors:Wu, Kai (1); Shi, Shuijuan (1); Peng, Binbin (1); Ding, Wuxue (1); Sun, Yu (1)
Author affiliation:(1) School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Corresponding author:Wu, K.
      (wukai@mail.njust.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:142-147
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:Purpose of the study was to provide a basis for reducing power dissipation, optimizing structural design and properly using the pellet mill in practice by force analysis in pelleting process. According to the analyses on the forming mechanism of the pellet mill and the researches on the working condition of the ring die, the maximum extruding height of the material and the maximum torque model were developed. Based on the models, the influences of the material properties and structure parameters on the torque were discussed. The research shows that the material properties have great effects on the energy consumption in pelletizing. It is favorable to use small roller and small length-diameter ratio of the die hole in certain range for lowering energy consumption. And larger pellet mill can increase production yield and reduce energy consumption. The results are significantly meaningful for reducing consumption of the pellet mill, and can provide reliable theoretical basis for some experiments.
Number of references:18
Main heading:Pelletizing
Controlled terms:Absorption - Dies - Energy utilization - Materials properties - Structural design - Torque
Uncontrolled terms:Diameter ratio - Die hole - Energy consumption - Energy consumption absorption - Extruding force - Force analysis - Forming mechanism - Material property - Maximum torque - Modeling and analysis  - Pelleting process - Production yield - Reducing power - Structure parameter - Theoretical basis - Working conditions
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 802.3 Chemical Operations - 603.2 Machine Tool Accessories - 525.3 Energy Utilization - 423 Non Mechanical Properties and Tests of Building Materials - 421 Strength of Building Materials; Mechanical Properties - 408.1 Structural Design, General
DOI:10.3969/j.issn.1002-6819.2010.12.024
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 17>

Accession number:20111013735491Title:Optimization of pullulanase hydrolysis technology in processing modified extrusion starch films
Authors:Su, Junfeng (1); Cheng, Jianjun (1)
Author affiliation:(1) College of Food Science, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Su, J.
      (sujf19851124@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:367-372
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to enhance the mechanical properties of the biodegradable corn starch films, the pullulanase and extruded corn starch were used to prepare films. Optimized technology for preparing biodegradable film was studied by the central composite rotatable design with five variables of pH, temperature, time, the dosage of pullulanase and extruded corn starch. The tensile strength of film was as the evaluation index. The results indicated that the effect order of five factors on the tensile strength of film was as follows: dosage of extruded starch, dosage of pullulanase, time, pH, temperature. With 46.57&deg;C reaction temperature, 4.44 pH, 6.63 u/g pullulanase, 9.31 h reaction time and 7.00% extruded corn starch, the predicted value of the film tensile strength was the highest (24.3654 MPa), whereas, the experimental value was 24.2539 MPa, which increased by 338.01% compared with the native corn starch film. The RSM-predicted tensile strength and the experimental tensile strength of modified extrusion starch films were not significantly different from each other. The results showed that the empirical model developed by response surface methodology was adequate to describe the relationships between the factors and response values. The tensile strength of modified extrusion corn starch film had extra significantly positive correlation with amylose content of modified extrusion starch (r = 0.863, P&lt;0.01).
Number of references:16
Main heading:Tensile strength
Controlled terms:Extrusion - Mechanical properties - Optimization - pH effects - Starch - Technology
Uncontrolled terms:Amylose content - Biodegradable film - Central composite rotatable design - Corn starch - Empirical model - Evaluation index - Experimental values - Modified film - Positive correlations - Pullulanase  - Reaction temperature - Reaction time - Response Surface Methodology - Starch films
Classification code:921.5 Optimization Techniques - 901 Engineering Profession - 804.1 Organic Compounds - 951 Materials Science - 801.1 Chemistry, General - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 535.2.2 Metal Forming Practice
DOI:10.3969/j.issn.1002-6819.2010.12.062
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 18>

Accession number:20111013735433Title:Effects of filter with uniform sandy filtration medium used in micro-irrigation on mass fraction of particles and turbidity of water with fly ash
Authors:Zhai, Guoliang (1); Chen, Gang (1); Zhao, Hongshu (3); Deng, Zhong (1); Feng, Junjie (1); Han, Qibiao (2); Liu, Yang (2)
Author affiliation:(1) College of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an 710049, China; (2) Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China; (3) Hydrochina Guiyang Engineering Corporation, Guiyang 550081, China
Corresponding author:Zhai, G.
      (zhai3393@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:13-18
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The aim of the research is to make clear the filtration effect of the uniform sandy filtration medium in micro-irrigation. An experimental research on the effects of filter with uniform in micro-irrigation on mass fraction of particles and turbidity of water with fly ash was carried out. The results of mass fraction of particles test showed that, the average removal rate of the mass fraction of particles was above 59%. However, the variation range of test data was large which indicated a complicated filtration process. Removal rate of the mass fraction of particles in filtered water was negatively correlated with filtration speed, and positively correlated with the mass fraction of particles of influent water. The conclusion described by the Mintz filter equation was showed its correctness in micro-irrigation through this study, namely, the filtration was a course that adsorption and abscission ocoured alternatively. The filtration flow regime was proven to be non-laminar flow, in most cases, might be in the transition region between the level flow and turbulence. The results of the turbidity test showed that the filtration layer thickness played decisive role in the removal rates of turbidity. Both the adsorption time and the abscission time were all about 5-6 min. The effect of the filtration rate on the removal rates of turbidity was limited. It could be summarized by comparing the two tests that the mass fraction of particles of filtered water and turbidity were two parameters that were not related with each other. The two filtration processes were different, so it was not correct that judge the effects of filtering and backwashing by turbidity index. The experiment can provide some references for the development of the future micro-irrigation.
Number of references:19
Main heading:Water filtration
Controlled terms:Adsorption - Filters (for fluids) - Fly ash - Irrigation - Laminar flow - Turbidity
Uncontrolled terms:Adsorption time - Back washing - Concentration - Experimental research - Filtered water - Filters - Filtration flow - Filtration process - Filtration rates - Layer thickness  - Mass fraction - Microirrigation - Removal rate - Sandy filter media - Test data - Transition regions - Two parameter
Classification code:631.1 Fluid Flow, General - 741.1 Light/Optics - 802.1 Chemical Plants and Equipment - 802.3 Chemical Operations - 804 Chemical Products Generally - 821.3 Agricultural Methods
DOI:10.3969/j.issn.1002-6819.2010.12.003
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 19>

Accession number:20111013735471Title:Crops distribution in large scale based on SPOT/VGT NDVI
Authors:Li, Yang (1); Jiang, Nan (1); Shi, Hao (2); L&#252;, Heng (1); Xue, Chunyan (2); Wang, Ni (2)
Author affiliation:(1) School of Geography Science, Nanjing Normal University, Nanjing 210046, China; (2) College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China
Corresponding author:Jiang, N.
      (njiang@njnu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:242-247
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With the extensive application of remote sensing technology in agriculture, the means of timely and accurately monitoring the growth and spatial distribution of crop in a small region have become reliable, however, if the survey is run in a large region, taking a province for instance, the mass data, countless working hours and expenses of remote sensing data used in the measurement of crop will bring the researchers some unsolvable problems. Meanwhile, the current census of agriculture in China is unable to provide a real-time database. In this paper, a long time series SPOT/VGT NDVI data was used in mapping the spatial distribution of crop in Jiangsu province, then the statistical regression analysis and comparison were carried out with the data derived from remote sensing measurement, agriculture census and field survey respectively. The results showed that a large scale crop monitoring during the growth period based on the long time series SPOT/VGT NDVI dataset can give a positive response. Compared with the agriculture census, the statistical regression analysis between the data derived from field survey and remote sensing measurement can guarantee a higher accuracy and meet the requirements of crop monitoring.
Number of references:18
Main heading:Spatial distribution
Controlled terms:Crops - Data handling - Monitoring - Regression analysis - Remote sensing - Surveys - Time series - Time series analysis
Uncontrolled terms:Crop monitoring - Data sets - Field surveys - Growth period - Jiangsu province - Large regions - Long time series - Mass data - NDVI - NDVI data  - Real-time database - Remote sensing data - Remote sensing technology - Small region - SPOT/VGT - Statistical regression - Stepwise regression - Unsolvable problems - Working hours
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922.2 Mathematical Statistics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 921 Mathematics - 731.1 Control Systems - 723.2 Data Processing and Image Processing - 405.3 Surveying - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.12.041
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 20>

Accession number:20111013735466Title:Non-destructive measurement of wheat spike characteristics based on morphological image processing
Authors:Bi, Kun (1); Jiang, Pan (1); Li, Lei (1); Shi, Benyi (1); Wang, Cheng (1)
Author affiliation:(1) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Wang, C.
      (wangc@nercita.org.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:212-216
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 shape parameter of wheat spike is a direct reflection of the wheat growth status. And it is also an important parameter which the species breeding and test experts care about. In order to achieve the non-destructive measurement of wheat spike morphological characteristics and rapid species classification based on these characteristics, the article proposed the spike traits extraction methods based on morphology: the awn number, the average awn length, the spike length. First, the wheat awn was removed through the wheat image morphological operations so as to get the main image of the wheat. And then calculated the spike length through the method of looking for spindle direction angle and rotating calculation external rectangle length, calculated the awn length and the number of the awn through the method of thinning the wheat awn image and corner detection, and estimated the spike type through width coefficient proportion. Secondly, a three layer BP neural network was designed with eight of the extracted characteristic parameters so as to classify the 240 pictures of 4 wheat varieties. The recognition accuracy rate was 88%. The method can be a reference for rapid species classification of wheat. Taking other external shape characteristics of wheat as supplement input parameters will improve the recognition accuracy greatly.
Number of references:21
Main heading:Neural networks
Controlled terms:Image processing - Imaging systems - Mathematical morphology - Morphology - Network layers
Uncontrolled terms:BP classifier - Characteristic parameter - Corner detection - Direction angle - External shape - Extraction method - Input parameter - Morphological characteristic - Morphological image processing - Morphological operations  - Non-destructive measurement - Recognition accuracy - Shape parameters - Species classification - Three layer BP neural network - Wheat spike
Classification code:723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 921 Mathematics - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2010.12.036
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 21>

Accession number:20111013735436Title:One-dimensional model development and validation of surface flow and solute transport for border irrigation in traditional surface fertilizer application
Authors:Zhang, Shaohui (1); Xu, Di (1); Li, Yinong (1); Bai, Meijian (1)
Author affiliation:(1) Department of Irrigation and Drainage, China Institute of Water Resources and Hydropower Research, Beijing 100048, China; (2) National Center of Efficient Irrigation Engineering and Technology Research, Beijing 100048, China
Corresponding author:Zhang, S.
      (zhangsh@iwhr.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:34-39
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 comparison basis can be provided for the advanced border fertigation application by simulating one-dimensional surface flow and solute transport process of border irrigation in traditional surface fertilizer application. A non-uniform distribution field of water flow velocity and solute concentration along the basin and its arbitrary vertical cross-section were constructed based on the vertical linear and logarithmic law in turbulence theory and continuous equation of incompressible hydrodynamics. A one-dimensional surface flow and solute transport model for border irrigation in traditional surface application of fertilizer was proposed. At the same time, validation of the proposed model was carried out using the results of two typical border irrigation tests. Results show that the proposed model can successfully simulate the water flow and solute transport processes of border irrigation, and exhibits good potential for use in conservation of water and solute quantities. Consequently, the proposed model provides a practical numerical tool for evaluating the performance of border irrigation in traditional surface application of fertilizer, and serves as a basis for comparison of border irrigation systems in different manners of fertilizer application.
Number of references:13
Main heading:Solute transport
Controlled terms:Fertilizers - Flow of water - Flow velocity - Hydraulics - Irrigation - Water conservation
Uncontrolled terms:Border irrigation - Fertigations - Fertilizer applications - Logarithmic law - Non-uniform distribution - Numerical tools - One-dimensional model - Solute concentrations - Solute transport model - Surface applications  - Surface flow - Transport process - Turbulence theory - Water flow - Water flows
Classification code:931 Classical Physics; Quantum Theory; Relativity - 821.3 Agricultural Methods - 804 Chemical Products Generally - 632.1 Hydraulics - 631.1.1 Liquid Dynamics - 631 Fluid Flow - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.12.006
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 22>

Accession number:20111013735450Title:Control strategy of high pressure pump unit applied to high pressure common rail multiple injection system
Authors:Wei, Xiong (1); Mao, Xiaojian (1); Xiao, Wenyong (1); Zhu, Keqing (1); Zhuo, Bin (1)
Author affiliation:(1) School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author:Wei, X.
      (weixiong6616398@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:120-124
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to meet the new requirements of multiple injections technology on high pressure pump, the control strategy based on high pressure pump of GD-1 electronic controlled diesel engine was designed and further tested on engine platform. The test results demonstrated that this control strategy achieved an effective control on the high-pressure pump, in which, not only the performance of high-pressure pump was improved, but also the reliability of fuel injection system was ensured. This control strategy can also provide a basis for common rail diesel engine to further improve the multiple injection control and emission.
Number of references:9
Main heading:Diesel engines
Controlled terms:Control systems - Engines - Fuel injection - Pumps
Uncontrolled terms:Control strategies - High pressure common-rail diesel engine - High pressure pump - Injection - Multiple injection
Classification code:521 Fuel Combustion and Flame Research - 612 Engines - 612.2 Diesel Engines - 618.2 Pumps - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2010.12.020
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 23>

Accession number:20111013735477Title:Safety of heavy metals pollution for wheat planted in reclaimed mining soil
Authors:Dong, Jihong (1); Yu, Min (1); Cheng, Wei (1); Ge, Dongmei (1); Li, Kexin (1)
Author affiliation:(1) College of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221008, China
Corresponding author:Dong, J.
      (dongjihong@cumt.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:280-286
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:To keep the ecological safety of cultivated crops in reclaimed lands by filling mining wastes and fly ash into subsided lands, the paper took Liuxin mining area, Xuzhou in China as research area. The contents of heavy metals As, Hg, Pb, Cu, Cd, Cr, Zn in different parts of wheat planted in reclaimed soils and control soil were tested and compared. The distributions of Cd and Cr in different organs of mature wheat and enrichment coefficient of root were studied. Besides, the single index and comprehensive index methods were used to evaluate the risk of wheat grain. The results showed that Cd and Hg contents were lower in immature seedlings than in mature stems, Cr, Cu and Zn contents were higher in immature seedlings than in mature stems, while the content regularity of Pb and As were not too obvious. All heavy metals contents were lower in immature roots than in mature roots in reclaimed soils. With exception of Cr and Zn, all the other heavy metals contents were higher in immature roots than in mature roots in control soil. According to the food standard, Cr and Cd contents in wheat grain exceeded the standard. The risk assessment results showed the single pollution index of Cd and Cr of wheat grain reached middle to high pollution level, the comprehensive risk index of wheat grain was in the middle to moderate pollution level. The study has important practical value for grain safety monitoring in mining areas.
Number of references:22
Main heading:Grain (agricultural product)
Controlled terms:Cadmium - Chromium - Copper - Fly ash - Land reclamation - Lead - Mercury (metal) - Metals - Pollution - Rating  - Reclamation - Risk assessment - Soils - Zinc
Uncontrolled terms:Comprehensive index method - Cultivated crops - Distribution trend - Ecological safety - Enrichment coefficients - Heavy metals content - Heavy metals pollution - In-control - Mining areas - Mining waste  - Pollution index - Pollution level - Reclaimed land - Reclaimed soil - Research areas - Risk indices - Safety monitoring - Wheat - Wheat grains - Zn content
Classification code:922.1 Probability Theory - 546.1 Lead and Alloys - 546.3 Zinc and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 821.4 Agricultural Products - 902.2 Codes and Standards - 544.1 Copper - 531 Metallurgy and Metallography - 483.1 Soils and Soil Mechanics - 454.2 Environmental Impact and Protection - 452.4 Industrial Wastes Treatment and Disposal - 442.2 Land Reclamation - 543.1 Chromium and Alloys
DOI:10.3969/j.issn.1002-6819.2010.12.048
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 24>

Accession number:20111013735460Title:Path-loss prediction for radio frequency signal of wireless sensor network in field based on artificial neural network
Authors:Li, Zhen (1); Hong, Tiansheng (1); Ning, Wang (2); Hong, Ya (1); Wen, Tao (1); Li, Jianian (1)
Author affiliation:(1) Key Laboratory of Key Technology for South Agricultural Machinery and Equipment, College of Engineering, South China Agricultural University, Guangzhou 510642, China; (2) Department of Biosystems and Agricultural Engineering, Oklahoma State University, 111 Ag Hall, Stillwater, OK, 74078, United States
Corresponding author:Hong, T.
      (tshong@scau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:178-181
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For solving the problem that path-loss of radio frequency signal could not be easily retrieved on the process of wireless sensor network (WSN) applications in field, the relationships between path-loss of WSN radio frequency (RF) signal in field and its impact factors were studied based on artificial neural network (ANN) theory. Two carrier frequencies, 915 MHz and 2 470 MHz, were selected. Path-loss prediction ANN model of WSN RF signal in field was achieved through measuring RF path-loss under the two carrier frequencies with different combinations of impact factors at different winter wheat growth stages. Correlation coefficient of the model was 0.92, by comparing the path-loss measured with predicted values, it was verified that the highest absolute prediction error was 4.186 dB, the highest prediction standard deviation was 2.759 dB and prediction accuracy was 94.2%. The designed BP ANN is suitable for path-loss prediction of the radio frequency signal in field.
Number of references:17
Main heading:Neural networks
Controlled terms:Agriculture - Forecasting - Indexing (of information) - Radio - Radio waves - Sensors - Wireless sensor networks
Uncontrolled terms:Artificial Neural Network - Carrier frequency - Correlation coefficient - Growth stages - Impact factor - In-field - Path loss - Precision Agriculture - Prediction accuracy - Prediction errors  - Radio frequency signal - Radiofrequency signals - RF signal - Standard deviation - Winter wheat
Classification code:716.3 Radio Systems and Equipment - 723.4 Artificial Intelligence - 801 Chemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 903.1 Information Sources and Analysis - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.12.030
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 25>

Accession number:20111013735440Title:Effects of low irrigation limits on yield and grain quality of winter wheat
Authors:Shen, Xiaojun (1); Sun, Jingsheng (1); Liu, Zugui (1); Zhang, Junpeng (1); Liu, Xiaofei (1)
Author affiliation:(1) Key Lab for Crop Water Requirement and Regulation, Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China
Corresponding author:Sun, J.
      (jshsun623@yahoo.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:58-65
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 formulate a high quality and efficient irrigation index of winter wheat in north China, a three-year field experiment was conducted from 2005 to 2008 to investigate the effects of different low irrigation limits on crop development, grain yield and grain quality of winter wheat under water controlling conditions. Results showed that compared with traditional method (proper soil water treatment at the whole period), there was no significant negative effect on crop growth, grain yield and quality of winter wheat. 11.68%-18.18% water were saved, and water use efficiency improved by 8.33%-12.5% under water stress during sowing to early jointing stage. Under water stress at jointing to early heading stage, there was most obvious inhibitory effect on crop growth of winter wheat, which caused Flour field, protein content, dough development time and stability time of grain significantly decreased, and 24.29%-31.95% water was saved, grain yield reduced by 6.56%-9.08%, but water use efficiency was improved by 6.19%-10.63%. Under water stress at heading to flowering stage, there was no significant negative effect on crop growth of winter wheat, protein content, wet gluten content, amino acids content and flour yield of grain increased significantly, but grain yield reduced by 9.96%-11.35%, water use efficiency was improved by 4.12%-5.62%. Water stress, occurred at the filling to ripening stage, had the least influence on crop growth of winter wheat, and significantly increased protein content, wet gluten content, amino acids content and flour yield of grain, but decreased grain yield significantly, and increased water use efficiency by 1.03%-5.95%. It was concluded that adequate water stress being permitted at sowing to jointing stage could be the high quality and efficient irrigation index of winter wheat in north China, low irrigation limits at sowing to early jointing stage, at jointing to early heading stage, at heading to flowering stage and at filling to ripening stage were 50%, 65%, 70%, and 65% of field capacity, respectively.
Number of references:19
Main heading:Water content
Controlled terms:Amino acids - Crops - Experiments - Grain (agricultural product) - Grain growth - Irrigation - Proteins - Quality assurance - Quality control - Soil moisture  - Water supply - Water treatment
Uncontrolled terms:Adequate waters - Crop development - Crop growth - Development time - Field capacity - Field experiment - Flowering stage - Grain quality - Grain yield - High quality  - Inhibitory effect - Low irrigation limit - North China - Protein contents - Under water - Water stress - Water use efficiency - Wheat - Winter wheat - Yield
Classification code:913.3 Quality Assurance and Control - 901.3 Engineering Research - 821.4 Agricultural Products - 821.3 Agricultural Methods - 933.1.2 Crystal Growth - 804.1 Organic Compounds - 446.1 Water Supply Systems - 445.1 Water Treatment Techniques - 444 Water Resources - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2010.12.010
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 26>

Accession number:20111013735483Title:Estimation of topsoil thickness in reclaimed field using EM38
Authors:Cai, Caixia (1); Lin, Jianhui (2); Meng, Fanjia (1); Sun, Yurui (1); Li, Daoliang (1)
Author affiliation:(1) Research Center for Precision Agriculture, China Agricultural University, Beijing 100083, China; (2) School of Technology, Beijing Forestry University, Beijing 100083, China
Corresponding author:Lin, J.
      (swiq_lin@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:319-323
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 paper provided a case example of EM38 for characterizing topsoil layer thickness (TSLT). The experimental site was a plot of a reclaimed field with 5000 m² in Fuxin Mining, China. Covered by the topsoil layer, a thick layer of coal waste was deposited. An analytical model was described based on measurement principle of EM38. According to the experimental results, a negative relationship between EC<inf>a</inf> and TSLT was fulfilled the necessary condition of the analytical model. By comparing three statistical models, a linear model was selected as the transform function between EC<inf>a</inf> and TSLT. A 3-D mapping was used to reveal the TSLT visually. The results showed that it was receivable to estimate the topsoil layer thickness of reclaimed fields by measuring EC<inf>a</inf> with EM38. The study can provide a method for determining the quality of reclaimed fields quickly and easily.
Number of references:15
Main heading:Reclamation
Controlled terms:Computer simulation - Electric conductivity - Mathematical models - Models - Soil surveys - Thickness gages - Thickness measurement
Uncontrolled terms:3-D mapping - Analytical model - Coal wastes - Electrical conductivity - EM38 - Linear model - Measurement principle - Reclaimed field - Statistical models - Thick layers  - Top-soil layer - Transform function
Classification code:921 Mathematics - 902.1 Engineering Graphics - 723.5 Computer Applications - 943.2 Mechanical Variables Measurements - 701.1 Electricity: Basic Concepts and Phenomena - 423.1 Non Mechanical Properties of Building Materials: Test Equipment - 406.2 Roads and Streets - 452.4 Industrial Wastes Treatment and Disposal
DOI:10.3969/j.issn.1002-6819.2010.12.054
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 27>

Accession number:20111013735458Title:Development situation analysis of crop cultivation mechanization in Heilongjiang Province
Authors:Wang, Jinwu (1); Ju, Jinyan (1); Wang, Jinfeng (1)
Author affiliation:(1) School of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Ju, J.
      (jujinyan2007@yahoo.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:168-172
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 scientifically analyze the development situation of crop cultivation mechanization in different regions, based on the existence research findings of agricultural mechanization, and combined with the actual situation in Heilongjiang province, evaluation index system was established, and the weights of evaluation indexes were ascertained by using Delphi method. At the same time, by referring to the development goal of realizing agricultural modernization in Heilongjiang province, standard values of evaluation indexes were determined. Finally, the development levels of crop cultivation mechanization from 2001 to 2008 were calculated by using synthetical evaluation method, which showed that the development level of crop cultivation mechanization increased from 45.91% in 2001 to 63.24% in 2008, with an average annual increase of 2.17%. Through comparative study of each evaluation index, the factors hindering the development rate of crop cultivation mechanization were analyzed. The results can provide a scientific basis for promoting the development of crop cultivation mechanization in Heilongjiang Province.
Number of references:20
Main heading:Cultivation
Controlled terms:Agricultural engineering - Crops - Machinery - Mechanization - Standardization
Uncontrolled terms:Agricultural mechanization - Comparative studies - Crop cultivation - Delphi method - Development rate - Evaluation index - Evaluation index system - Evaluation Method - Heilongjiang Province - Index system  - Situation analysis - Standard values - Synthetically evaluation
Classification code:601 Mechanical Design - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 902.2 Codes and Standards
DOI:10.3969/j.issn.1002-6819.2010.12.028
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 28>

Accession number:20111013735442Title:Simulation on regulation for efficient utilization of water and fertilizer resources in paddy fields
Authors:Shao, Dongguo (1); Sun, Chunmin (1); Wang, Hongqiang (1); Liu, Huanhuan (1); Yuan, Junguang (2); Wang, Jianzhang (3); Zheng, Chuanju (3)
Author affiliation:(1) State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; (2) Hubei Provincial Water Resources Bureau, Wuhan 430071, China; (3) Hubei Zhanghe Hydranlic Project Administ Ration Bureau, Jingmen 448159, China
Corresponding author:Sun, C.
      (sunchunmin@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:72-78
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:Water and fertilizer are main factors influencing crop yield and ecological environment. In order to explore the law of water and fertilizer in the paddy field, reach the target of minimizing irrigation water, fertilization and drainage water as well as maximizing the rice yield, the response relationship on the amount of drainage water and the yield under different conditions of rainfall frequency, irrigation methods, fertilization level, controlled drainage were analyzed based on the observation data of experiment on water and fertilizer coupling irrigation and controlled drainage in Tuanlin, Zhanghe Irrigation District, Hubei province, and the combination of crop growth model ORYZA2000 and DRAINMOD 6.0 model. The nitrogen production function was obtained through calculation and analysis. The paper proposed the threshold of amount of water and fertilizer where agriculture management of intermittent irrigation is applied. The study results indicated that when the irrigation water capacity was 30 mm, the application of nitrogen was 170 kg/hm², and the water table of controlled drainage was 20 cm, water conservation was reached to 12.5%-18.87%, fertilizer application was reduced by 35.1%, yield increased by 11%, the amount of discharge water was reduced by 19.9%. Therefore, the study can help to strengthen the scientific management of water and fertilizer, promote the use efficiency of water and nitrogen, and prevent agricultural non-point source pollution. It is also important to promote the sustainable development of irrigation district.
Number of references:19
Main heading:Nitrogen fertilizers
Controlled terms:Aquifers - Crops - Irrigation - Nitrogen - Optimization - Wastewater disposal - Water conservation - Water management - Water supply
Uncontrolled terms:Agriculture management - Controlled drainage - Critical condition - Crop growth model - Crop yield - Discharge water - Drainage water - DRAINMOD - Ecological environments - Fertilizer applications  - Hubei Province - Irrigation districts - Irrigation methods - Irrigation waters - Non-point source pollution - Observation data - Paddy fields - Production function - Rainfall frequency - Rice water-saving irrigation  - Rice yield - Scientific management - Use efficiency - Water tables
Classification code:921.5 Optimization Techniques - 821.4 Agricultural Products - 821.3 Agricultural Methods - 804 Chemical Products Generally - 452.4 Industrial Wastes Treatment and Disposal - 446.1 Water Supply Systems - 446 Waterworks - 444.2 Groundwater - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.12.012
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 29>

Accession number:20111013735459Title:Probing method of tree spray target profile
Authors:Zhai, Changyuan (1); Zhao, Chunjiang (1); Wang, Xiu (2); Zou, Wei (2); Mao, Yijin (2); Zhang, Rui (2)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) National Engineering Research Centre for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Zhao, C.
      (zhaocj@nercita.org.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:173-177
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 research tree spray target profile probing method, and provide the theoretical support for variable spray based on real-time probing target profile, a tree spray target profile probing platform was improved. The platform could move sensors precisely, and densely probe canopy structure by setting a step as 0.02 m. The platform could record probing data into Access database and showed the results in real time by computer. The platform was used in probing canopy profile of cherry tree in the flowering stage and artificial tree with regular shape. Experiment results indicated that measurement accuracy of regular shape canopy and cherry tree canopy profile probing was 92.8% and 90.0%, respectively, which showed that this method has high accuracy.
Number of references:19
Main heading:Real variables
Controlled terms:Database systems - Sensors - Ultrasonics
Uncontrolled terms:Canopy profile - Canopy structure - Database - Flowering stage - Measurement accuracy - Real time - Real-time probing - Research tree - Tree canopy - Variable spray
Classification code:723.3 Database Systems - 753.1 Ultrasonic Waves - 801 Chemistry - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.12.029
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 30>

Accession number:20111013735472Title:Kalman filtering for integrated navigation based on time series analysis
Authors:Zhou, Jun (1); Zhang, Peng (1); Liu, Chengliang (2)
Author affiliation:(1) College of Engineering, Nanjing Agricultural University, Nanjing 210031, China; (2) School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
Corresponding author:Zhou, J.
      (zhoujun@njau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:254-258
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:GPS is applied widely in autonomous navigation of the agricultural machinery. Its positioning error, however, is characterized by autocorrelation, can not satisfy the requirement of Kalman filtering, which is the base of the integrated navigation system of the agricultural machinery. So the characteristic of GPS positioning error was described as AR model with the time series analysis. Then the method to predict and modify the GPS positioning error with AR model and optimal estimation of Kalman filtering was introduced. And the corrected GPS positioning data were applied in the Kalman filtering for the integrated navigation of the agricultural machinery. The experimental results showed that the autocorrelation between neighboring positioning error data was decreased dramatically, and being similar to the white noise, no matter the GPS receiver was static or not. And when the tracked path was straight and curve, the maximum tracking error was about 0.15 m and 0.3 m respectively. This method can provide a viable way to achieve high-accuracy navigation with low-accuracy GPS for the agricultural machinery.
Number of references:13
Main heading:Global positioning system
Controlled terms:Agricultural machinery - Autocorrelation - Integration - Kalman filters - Navigation - Navigation systems - Time series - Time series analysis - White noise
Uncontrolled terms:Agricultural robot - AR model - AR models - Autonomous navigation - GPS - GPS positioning - GPS receivers - High-accuracy - Integrated navigation - Integrated navigation systems  - Kalman filtering - Optimal estimations - Positioning error - Tracking errors
Classification code:922.2 Mathematical Statistics - 922 Statistical Methods - 921.2 Calculus - 921 Mathematics - 821.1 Agricultural Machinery and Equipment - 731.1 Control Systems - 716.3 Radio Systems and Equipment - 711 Electromagnetic Waves - 434.4 Waterway Navigation
DOI:10.3969/j.issn.1002-6819.2010.12.043
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 31>

Accession number:20111013735465Title:Segmentation algorithm of overlapping tomato seedling leaves based on edge chaincode information
Authors:Sun, Guoxiang (1); Wang, Xiaochan (1); He, Guomin (1)
Author affiliation:(1) College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:Wang, X.
      (wright7878@yahoo.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:206-211
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to overlapping leaves while robotic transplanters extracting seedling leaves' feature parameters with machine vision, a layer-by-layer segmentation algorithm was proposed based on overlapping leaves chaincode information. Firstly the chaincode was counted and corners and edges of overlapping leaves were detected based on edge binary image from original image preprocessing. Then the overlapping leaves were separated layer-by-layer through authentic corners and edges pairing, and the overlapping leaves segmentation was achieved by linear interpolation. The result of experiments showed that the segmented leaves images would not be changed by rotation, and the success rate of the algorithm was 100% and 96% respectively and the separating time was 0.835 and 0.99 s respectively for two types of plug size (72 cells and 128 cells). This segmentation algorithm has the advantage of high speed and high accuracy with rotation invariance, and can meet the requirements of automatic transplanting.
Number of references:16
Main heading:Image segmentation
Controlled terms:Algorithms - Computer vision - Detectors - Fruits - Rotation
Uncontrolled terms:Chain codes - Chaincode - Corner detection - Feature parameters - Layer-by-layers - Linear Interpolation - Machine vision - Original images - Overlapping leaves - Rotation invariance  - Segmentation algorithms - Separated layer - Tomato seedlings
Classification code:601.1 Mechanical Devices - 723 Computer Software, Data Handling and Applications - 821.4 Agricultural Products - 914 Safety Engineering - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.12.035
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 32>

Accession number:20111013735467Title:Validation of MODIS FAPAR in the Hulunber grassland of China
Authors:Li, Gang (1); Zhang, Hua (3); Fan, Wenjie (4); Zhang, Hongbin (1); Xin, Xiaoping (1)
Author affiliation:(1) Hulunber State Station of Grassland Ecosystem Field Observation and Scientific Research, Beijing 100081, China; (2) Key Lab of Resource Remote Sensing and Digital Agriculture, Ministry of Agriculture, Beijing 100081, China; (3) Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (4) Institute of Remote Sensing and GIS, Peking University, Beijing 100871, China
Corresponding author:Xin, X.
      (xinxp@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:217-224
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 accuracy validation of the MODIS/FAPAR product is a prerequisite for using it to estimate local net primary production (NPP), and to supply service for monitoring the balance of region carbon and arranging production of grassland animal husbandry rationally. For this purpose, we designed and carried out in-situ measurements of FAPAR in two 2 km&times;2 km areas within the temperate meadow-steppe grassland in Hulunber during growing season in 2008, and analyzed heterogeneity of the two sites using image of Beijing-1 satellite with resolution of 32 m, and then scaled up and validated MODIS/FAPAR products with in-situ measured data in grassland area. The results showed that the MODIS FAPAR product reflected very well the seasonal dynamics of in-situ FAPAR, but tended to overestimate the value with averaged relative error of 13.7% in the Stipa Baicalensis site and 18.7% in the Leymus Chinensis site. The MODIS/FAPAR algorithm was derived based on the global land cover map, which may be too broad for local areas. More fieldworks for various types of the grasslands are necessary.
Number of references:21
Main heading:Radiometers
Controlled terms:Agriculture - Remote sensing
Uncontrolled terms:FAPAR - Grassland - Hulunber - MODIS - NDVI - Validation
Classification code:731.1 Control Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 944.7 Radiation Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2010.12.037
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 33>

Accession number:20111013735437Title:Numerical analysis of layout parameters and reasonable design of grape drip irrigation system for stony soil in Xinjiang Uighur Autonomous Region
Authors:Chen, Ruonan (1); Wang, Quanjiu (1); Yang, Yanfen (2)
Author affiliation:(1) Institute of Water Resource, Xi'an University of Technology, Xi'an 710048, China; (2) Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, 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:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:40-46
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 laws of soil water movement under complex stony soil condition and optimize the design parameters and layout parameters of grape drip irrigation system in Xinjiang Uighur Autonomous Region, field experiments were carried out to determine the appropriate distance between the emitters should be 30 cm. Hydrus-2D numerical model was performed to estimate the hydraulic parameters of stony soil and simulate the soil water distribution characters of surface drip infiltration under different emitter discharge rates and lateral pipeline layout distance styles. According to the simulated wetted body feature and grape root distribution character, the rational discharge rates should be between 2.5 L/h and 3.0 L/h, and the reasonable lateral spacing of drip irrigation pipeline should be 60 cm. The results can provide some guidelines for scientific design and rational filed layout of grape irrigation system under stony soil.
Number of references:21
Main heading:Geologic models
Controlled terms:Design - Fruits - Hydraulics - Irrigation - Moisture determination - Numerical analysis - Pipelines - Soil moisture - Two dimensional - Water supply systems
Uncontrolled terms:Appropriate distances - Design parameters - Discharge rates - Distribution - Drip irrigation - Drip irrigation systems - Dripper discharge - Field experiment - Hydraulic parameters - HYDRUS-2D  - Irrigation systems - Numerical models - Pipeline layout - Root distribution - Soil conditions - Soil water movement - Soil-water distribution - Xinjiang
Classification code:944.2 Moisture Measurements - 921.6 Numerical Methods - 902.1 Engineering Graphics - 821.4 Agricultural Products - 821.3 Agricultural Methods - 632.1 Hydraulics - 619.1 Pipe, Piping and Pipelines - 483.1 Soils and Soil Mechanics - 481.1 Geology - 446.1 Water Supply Systems - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2010.12.007
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 34>

Accession number:20111013735473Title:Water saving efficiency of closed greenhouse based on evapotranspiration equilibrium
Authors:Zhang, Cheng (1); He, Chaoxing (2); Zaragoza, Guillermo (3); Yan, Denghua (1); Buend&#237;a, Dolores (3); Zhao, Zhixuan (1)
Author affiliation:(1) China Institute of Water Resource and Hydropower Research, Beijing 100038, China; (2) The Institute of Vegetables and Flower, Chinese Academy of Agricultural Science, Beijing 100081, China; (3) Estaci&#243;n Experimental de la Fundaci&#243;n Cajamar, El Ejido, Almer&#237;a, Spain; (4) School of Civil Engineering, Tianjin University, Tianjing 300072, China
Corresponding author:Zhang, C.
      (zhch16_1981@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:259-264
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For improving the water-saving capacity in greenhouse, the characters of closed structure, water and energy saving, and purification of Watergy closed greenhouse in Spain was analyzed. Through establishing two models based on evapotranspiration equilibrium, two water balance systems were evaluated, and the possibility of improving condensation in a closed greenhouse was demonstrated. According to the agronomic results, the ability of water-saving and agro-production was pointed out. Two months experiment indicated that the difference between water input and output was only 244 L, which showed a good water-saving effect. The yield of "Strike" beans were 5 times in 2006 (51 kg/m³) in this case comparing with a similar crop growing in an open greenhouse. Lastly, some suggestions for improving the condensation, the future prospects and problems were discussed.
Number of references:11
Main heading:Greenhouses
Controlled terms:Condensation - Cultivation - Energy conservation - Evapotranspiration - Water conservation - Water supply
Uncontrolled terms:Agro-production - Closed structures - Future prospects - Input and outputs - Water and energies - Water and energy saving - Water balance - Water production - Water saving efficiencies - Water-saving  - Watergy project
Classification code:444 Water Resources - 446.1 Water Supply Systems - 525.2 Energy Conservation - 802.3 Chemical Operations - 821.3 Agricultural Methods - 821.6 Farm Buildings and Other Structures
DOI:10.3969/j.issn.1002-6819.2010.12.044
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 35>

Accession number:20111013735478Title:Economic dispatching of renewable energy distribution generation systems
Authors:Wu, Hongbin (1); Cai, Liang (1)
Author affiliation:(1) Photovoltaic System Research Center of Ministry of Education, Hefei University of Technology, Hefei 230009, China
Corresponding author:Cai, L.
      (cailianghfah@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
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:Through the study on economic dispatching of renewable energy distribution generation system, the operating costs and environmental pollution could be minimized on the premise of meeting the demands, and eventually the renewable energy would be more efficiently used. The mathematical models of renewable energy distribution generation system were analyzed in detail which including solar power, wind power, fuel cell, diesel and battery were analyzed. Based on the models, the objective functions and energy dispatching strategies of the system were presented. The objective functions were calculated with the priority list method. The simulation results showed the correctness and validity of the models and algorithms. The method can provide a reference for the optimal dispatch and economic combination of generation unit in renewable energy distribution generation systems.
Number of references:18
Main heading:Solar energy
Controlled terms:Computer simulation - Distributed power generation - Energy resources - Fuel cells - Ion beams - Mathematical models - Operating costs - Wind power
Uncontrolled terms:Dispatch - Distributed generation - Environmental pollutions - Generation units - Objective functions - Optimal dispatch - Priority list method - Priority list methods - Renewable energies - Simulation result  - Solar power
Classification code:921 Mathematics - 911.1 Cost Accounting - 723.5 Computer Applications - 932.1 High Energy Physics - 702.2 Fuel Cells - 615 Thermoelectric, Magnetohydrodynamic and Other Power Generators - 525.1 Energy Resources and Renewable Energy Issues - 702 Electric Batteries and Fuel Cells
DOI:10.3969/j.issn.1002-6819.2010.12.049
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 36>

Accession number:20111013735443Title:Field simulated experiment on soil erosion and sediment yield of unpaved roads
Authors:Wang, Zhen (1); Wang, Wenlong (1); Luo, Ting (2); Jin, Jian (3); Wang, Hao (4)
Author affiliation:(1) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (2) College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) Xifeng Soil and Water Conservation Experimental Station, Qingyang 745000, China; (4) Scientific Research Office, Agriculture and Forestry University of Fujian, Fuzhou 350002, China
Corresponding author:Wang, Z.
      (wz19840625@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:79-83
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 field scouring experiment on soil erosion and sediment yield on unpaved roads was conducted to provide scientific date for predicting and controlling soil and water loss on unpaved roads. Results indicated that the variation of sediment yield appeared in three types, which were smooth, multimodal, and unmoral distribution on the condition of combination of same slope with different runoff discharges, or same discharge with different slopes. Spatial variation of sediment yield with slope profile could be showed reduction in three types, wave, gradual reduction and reduction after increase on the same road surface. The variations of average sediment concentration with supplied runoff discharge were accorded with logarithmic correlations. But, variations of sediment yield rate with supplied runoff discharges, average sediment concentration with slope, sediment yield rate with slope were accorded with linear correlation. The result was prospected to provide theoretical foundation for research and predication in the soil erosion of unpaved roads.
Number of references:13
Main heading:Sedimentology
Controlled terms:Anoxic sediments - Concentration (process) - Erosion - Experiments - Roads and streets - Runoff - Sediment transport - Sedimentation - Soils
Uncontrolled terms:Different slopes - Linear correlation - Multi-modal - Road surfaces - Runoff discharge - Scouring experiments - Sediment concentration - Sediment yield rate - Sediment yields - Simulated experiments  - Slope - Slope profile - Soil and water loss - Soil erosion - Spatial variations - Theoretical foundations - Unpaved roads
Classification code:901.3 Engineering Research - 802.3 Chemical Operations - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 481.1 Geology - 444.1 Surface Water - 406.2 Roads and Streets
DOI:10.3969/j.issn.1002-6819.2010.12.013
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 37>

Accession number:20111013735474Title:Preparation technology of oriented cotton stalk bunches/high density polyethylene composite panels
Authors:Qi, Chusheng (1); Guo, Kangquan (1); Gu, Rong (1); Liu, Yanyan (3)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Shaanxi Engineering Research Center for Agricultural Equipment, Yangling 712100, China; (3) College of Science and Information, Qingdao Agricultural University, Qingdao 266109, China
Corresponding author:Guo, K.
      (jdgkq@nwsuaf.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:265-270
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For utilizing cotton stalk resources efficiently, a type of composite panels was produced by using extruded and oriented cotton stalk bunches as well as thermoplastic high density polyethylene (HDPE). Decomposition characteristics of cotton stalks was investigated by thermogravimetric analysis, and effects of density, HDPE loading, hot-pressing temperature and hot-pressing time on mechanical properties of composite panels were also analyzed by orthogonal experiment. Besides, intermeshing structure in the interface between cotton stalk fibers and HDPE was also investigated by scanning electron microscopy. The results showed that the superior hot-pressing parameters of producing composite panels were the following: density, HDPE loading, hot-pressing temperature and hot-pressing time were 0.8 g/cm³, 50%, 168&deg;C, and 17 min, respectively. The modulus of rupture, modulus of elasticity and internal bounding strength of the composite panels reached 31.51 MPa, 4 561.25 MPa and 0.52 MPa, respectively. According to the above parameters, those mechanical properties can meet the standard values of particle board OSB/1.
Number of references:20
Main heading:High density polyethylenes
Controlled terms:Cotton - Density (specific gravity) - Hot pressing - Mechanical properties - Plastic deformation - Scanning electron microscopy - Thermogravimetric analysis - Thermoplastics
Uncontrolled terms:Composite panels - Cotton stalk - High density - Hot pressing temperature - Interfacial structure - Modulus of elasticity - Modulus of rupture - Oriented composites - Orthogonal experiment - Polyethylene composites  - Preparation technology - Pressing time - Properties of composites - Standard values
Classification code:951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 819.1 Natural Fibers - 815.1.1 Organic Polymers - 812.1 Ceramics - 801 Chemistry - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2010.12.045
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 38>

Accession number:20111013735490Title:Desalination of dairy whey by nanofiltration
Authors:Kong, Fanpi (1); Liu, Lu (1); Sun, Zhuo (2); Li, Hongjuan (1); L&#252;, Jiaping (1)
Author affiliation:(1) Key Laboratory of Agro-food Processing and Quality Control, Institute of Agro-food Science and Technology, Chinese Academy of Agricultural Science, Beijing 100193, China; (2) College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
Corresponding author:L&#252;, J.
      (lvjp586@vip.sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:363-366
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For the development of economically desalination technology of whey and improve product quality and additional value. Adopting the whole retentate circle cross-flowing device, desalinization of sweet whey by nanofiltration process was studied in this research. We investigated the variations of salt rejection with or without adding water in the process of nanofiltration, and chosen the appropriate desalting parameters according to the salt rejection index. The results showed that, at 1.1 MPa operating pressure and 4.5 L/min system flow at 30&deg;C, the best effect was obtained under the condition of continuously adding de-ionized water (same as the volume of the retentate)to the rejection liquid with the penetration rate up to 1.5 volume concentration ratio. After spray drying, 45% salt rejection was obtained comparing to the raw whey powder and the whey protein and lactose was completely retained.
Number of references:16
Main heading:Water filtration
Controlled terms:Desalination - Drying - Economic and social effects - Nanofiltration - Optimization - Pressure effects - Spray drying - Sugars
Uncontrolled terms:Desalination technologies - Operating pressure - Penetration rates - Product quality - Retentate - Salt rejections - Sweet whey - System flow - Volume concentration ratios - Whey  - Whey powders - Whey proteins
Classification code:802.3 Chemical Operations - 804.1 Organic Compounds - 822.2 Food Processing Operations - 921.5 Optimization Techniques - 931.1 Mechanics - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2010.12.061
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 39>

Accession number:20111013735486Title:Land use pattern optimization based on eco-service value in the upper Chaobai River Basin
Authors:Zheng, Jiangkun (1); Yu, Xinxiao (1); Xia, Bing (1); Jia, Guodong (1); Pang, Zhuo (1); Song, Siming (1)
Author affiliation:(1) Key Laboratory for Soil and Water Conservation and Desertification Combating, Institute of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
Corresponding author:Yu, X.
      (yuxinxiao@bjfu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:337-344
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 ecological environmental security and human development are closely related. With the forest eco-service value and the total value of eco-service as main aims, the constraint functions and transformation rules as conditions; the land use situation analysis in 2008 was conducted in number optimization and spatial configuration by linear programming of grey parameters and CLUE-S model in the upper Chaobai River Basin. The results showed that the forestry area and forest eco-service value after the optimal allocation were significantly larger than those in 2008. The fact that increasing rate of forest eco-service value was higher than that of forestry area indicated that the forest eco-service value per unit area was increased and forest structure was improved. With the grasslands or unused lands transforming to forestry or residential and industrial areas, the total value of eco-services was increased mainly in regulation and support services. Driven by economic interests, the development model in the basin brought a great pressure to sustainable development of the capital. Therefore, land degradation and environmental damage should be controlled and improved through resource optimization.
Number of references:25
Main heading:Linear programming
Controlled terms:Forestry - Geographic information systems - Information systems - Land use - Linear transformations - Optimization - Rivers - Timber - Watersheds
Uncontrolled terms:CLUE-S model - Constraint functions - Development model - Eco-service value - Economic interests - Environmental damage - Environmental security - Forest structure - Forestry areas - Grey parameters  - Human development - Industrial area - Land degradation - Land use pattern - Optimal allocation - Per unit - Resource optimization - River basins - Situation analysis - Spatial configuration  - Support services - Total values - Transformation rules - Upper Chaobai River Basin
Classification code:921.3 Mathematical Transformations - 903.2 Information Dissemination - 821.0 Woodlands and Forestry - 921.5 Optimization Techniques - 723.3 Database Systems - 415.3 Wood Structural Materials - 403 Urban and Regional Planning and Development - 444.1 Surface Water
DOI:10.3969/j.issn.1002-6819.2010.12.057
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 40>

Accession number:20111013735481Title:Suitability evaluation of reserve resources of cultivated land development in Beijing
Authors:Guan, Xiaoke (1); Zhang, Fengrong (1); Li, Le (1); Guo, Li'na (2); Shao, Zhanlin (1)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (2) College of Transportation and Mapping, Hebei Polytechnic University, Tangshan 063009, China
Corresponding author:Zhang, F.
      (zhangfr@cau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:304-310
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:Suitability evaluation of reserve resources of cultivated land provides a scientific basis for reasonable exploitation and utilization of unused lands. Taking the whole unused land in Beijing as the evaluating object and based on physical, socioeconomic and graphic data, the evaluation systems for reserve resources of cultivated land development were established form the perspectives of physical suitability, ecological security and constraint factors. On the support of spatial analysis function in GIS software, area and spatial distribution of reserve resources of cultivated land development suitability under different conditions were evaluated, and the economic viability of reserve resources of cultivated land development was probed. The results indicated that the total area of reserve resources of cultivated land that could be developed was 11675.25 hm², form the physical suitability perspective. However, it would reduce to 11221.14 hm², if ecological security factors were considered. Furthermore if economic feasibility factors were taken into account, there would be no reserve resources of cultivated land that could be developed in Beijing. The combination of constraint factors with integrated evaluating framework can effectively improve the rationality of evaluation results, which also can provide a reference for the policy making of land development and consolidation in Beijing.
Number of references:17
Main heading:Land use
Controlled terms:Ecology - Economics - Planning - Regional planning - Spatial distribution - Spatial variables measurement
Uncontrolled terms:Beijing - Cultivated land - Reserve resources - Spatial analysis - Suitability evaluation
Classification code:403 Urban and Regional Planning and Development - 403.2 Regional Planning and Development - 454.3 Ecology and Ecosystems - 921 Mathematics - 943.2 Mechanical Variables Measurements - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2010.12.052
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 41>

Accession number:20111013735431Title:Thinking of food security in China based on regional water resources and land cultivation
Authors:Yang, Guiyu (1); Wang, Lin (1); Wang, Hao (1)
Author affiliation:(1) China Institute of Water Resources and Hydropower Research, Beijing 100038, China
Corresponding author:Yang, G.
      (guiyuy@iwhr.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:1-5
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Food security is currently a primary research focus in China and abroad. In recent years the discrepancy between global food supply and the need for food has become increasingly severe. Both water and land availability are rigid constrains to food production. Thus this paper analyzed the current situation in relation to China's agricultural land and water resources and their impact on food production, and then suggested strategies that increasing the use of soil moisture and rainfall by crops to minimize irrigation when maintaining basic cultivated land to ensure an adequate food supply in the future. This was emphasized through analyzing the water requirements of typical crops and farmland under different irrigation conditions in the Haihe River basin.
Number of references:29
Main heading:Water resources
Controlled terms:Crops - Cultivation - Food supply - Irrigation - Rivers - Soil moisture - Watersheds
Uncontrolled terms:Agricultural land - Cultivated lands - Current situation - Food production - Food security - Haihe River basin - Land availability - Land resources - Regional water resources - Water requirements  - Water resources exploitation
Classification code:404.2 Civil Defense - 444 Water Resources - 444.1 Surface Water - 483.1 Soils and Soil Mechanics - 821.3 Agricultural Methods - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.12.001
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 42>

Accession number:20111013735488Title:Optimization of shiitake mushroom vacuum tempering drying process based on imaginary calculation of its shrinking rate
Authors:Gong, Yuanjuan (1); Yu, Yongwei (1); Qin, Junwe (1); Lin, Jing (1)
Author affiliation:(1) College of Engineering, Shenyang Agricultural University, Shenyang 110866, China
Corresponding author:Gong, Y.
      (yuanjuangong@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:352-357
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:Analyzing the area shrinking rate of shiitake mushroom before and after drying with digital image processing technology is an effective method to estimate the drying characteristics of shiitake mushroom. It is a valid measure to improve the drying quality of shiitake mushroom and save the energy by the vacuum tempering (discontinuous) drying. Based on the quadratic regression orthogonal experimental design with four factors and five levels, the effect of four factors, which including vacuum of the drying chamber, temperature of the heating plate, moisture content at the tempering moment and the tempering period, on the area shrinkage and the drying period during drying process was studied and the multiple regression mathematic model was established. The vacuum tempering drying process parameters of shiitake mushroom was optimized and verified with the multi-objective nonlinear optimization theory, and the optimal process parameters are as follows: the heating plate temperature is 70&deg;C, the vacuum of the drying chamber is 0.09 MPa, the moisture content at the tempering moment is 70% and the tempering period is 11.3 min. These parameters can be a guidance for practical Shiitake drying.
Number of references:14
Main heading:Drying
Controlled terms:Curing - Heating - Image processing - Imaging systems - Moisture - Moisture determination - Multiobjective optimization - Shrinkage - Site selection - Tempering  - Vacuum
Uncontrolled terms:Before and after - Digital image processing - Drying chambers - Drying characteristics - Drying process - Drying quality - Heating plate temperature - Heating plates - Mathematic model - Moisture contents  - Multi objective - Multiple regressions - Non-linear optimization - Optimal process - Orthogonal experimental design - Quadratic regression - Shiitake - Shrinking rates - Vacuum tempering
Classification code:921.5 Optimization Techniques - 815.1 Polymeric Materials - 801.4 Physical Chemistry - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 944.2 Moisture Measurements - 643.1 Space Heating - 633 Vacuum Technology - 537.1 Heat Treatment Processes - 403 Urban and Regional Planning and Development - 402 Buildings and Towers - 642.1 Process Heating
DOI:10.3969/j.issn.1002-6819.2010.12.059
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 43>

Accession number:20111013735447Title:Characteristic analysis of phosphorus loss in surface drainage from cropland in Zhanghe Irrigation District
Authors:Li, Ruihong (1); Hong, Lin (1); Luo, Wenbing (1)
Author affiliation:(1) State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; (2) MCC Capital Engineering and Research Incorporation Limited Qinhuangdao, Hebei 066004, China
Corresponding author:Hong, L.
      (lhong@whu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:102-106
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 reveal the mechanisms and causes of agricultural non-point source pollution, the Zhanghe Irrigation District in Hubei Province was selected to conduct the study on the basis of analyses of field experiments in this paper. The influencing factors and patterns of phosphorus losses in the agricultural drainage water of paddy rice and corn fields were studied. The results showed that rainfall intensity, crop type and agricultural tillage management (including irrigation techniques and fertilizer application, etc) are the crucial factors influencing the loss of phosphorus from agricultural drainage. Besides, soil physical and chemical properties, topography and land slope also affect the losses of phosphorus from farmland to a certain extent.
Number of references:20
Main heading:Phosphorus
Controlled terms:Chemical properties - Farms - Irrigation - Rain - Wastewater disposal
Uncontrolled terms:Agricultural drainage - Agricultural drainage water - Characteristic analysis - Corn fields - Farmland - Fertilizer applications - Field experiment - Hubei Province - Influencing factor - Irrigation districts  - Non-point source pollution - Paddy rice - Pattern - Phosphorus loss - Rainfall intensity - Soil physical and chemical properties - Surface drainage - Tillage management
Classification code:821.3 Agricultural Methods - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 801 Chemistry - 452.4 Industrial Wastes Treatment and Disposal - 443.3 Precipitation - 423 Non Mechanical Properties and Tests of Building Materials
DOI:10.3969/j.issn.1002-6819.2010.12.017
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 44>

Accession number:20111013735480Title:Fuzzy synthetical evaluation of meteorological disasters to Camellia Sinensis (L. O. Ktze) and its regionalization in Hubei Province
Authors:Chen, Sining (1); Shen, Shuanghe (1); Liu, Min (3); Feng, Ming (3); Zhang, Weiwei (1)
Author affiliation:(1) College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China; (2) Chinese Academy of Meteorological Sciences, Beijing 100081, China; (3) Wuhan Regional Climate Center, Wuhan 430074, China
Corresponding author:Shen, S.
      (shuanghes@yahoo.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:298-303
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:Meteological disasters are the main factors that restrict the production of Camellia Sinensis (L. O. Ktze) and affect the quality of Camellia Sinensis (L. O. Ktze). To evaluate the characteristics of spatial distribution of Camellia Sinensis (L. O. Ktze)'s meteorological disasters and their relationship with the meteorological elements in Hubei province comprehensively, this paper studied the disaster-causing factors and the classification of grade for the Camellia Sinensis (L. O. Ktze)'s freeze injury in overwintering period and dry-thermal injury between July and August, and then applied fuzzy synthetical evaluation model in fuzzy mathematics to analyze the spatial distribution of meteorological disasters to Camellia Sinensis (L. O. Ktze) in Hubei Province, based on the professional meteorological interpolation software ANUSPLIN. The results show that, it is quit different for the spatial distribution of Camellia Sinensis (L. O. Ktze)'s meteorological disasters in Hubei Province: the level of freeze injury in overwintering period to Camellia Sinensis (L. O. Ktze) in Hubei Province is gradually increasing from south to north, and the severe dry-thermal injury areas mainly lie in the central region of Hubei Province, while the mild dry-thermal injury areas locate in the vicinity of east and west sides of the severe dry-thermal injury areas. For; most parts of eastern and some areas in northwest of Hubei Province are the moderate dry-thermal injury areas. The comprehensive evaluation of Camellia Sinensis (L. O. Ktze)'s meteorological disasters can provide a theoretical basis to cope with Camellia Sinensis (L. O. Ktze)'s meteorological disasters and adjust the agriculture production layout of Camellia Sinensis (L. O. Ktze) in Hubei Province.
Number of references:18
Main heading:Meteorological problems
Controlled terms:Disasters - Estimation - Fuzzy logic - Fuzzy sets - Spatial distribution
Uncontrolled terms:ANUSPLIN - Camellia sinensis - Comprehensive evaluation - Freeze-injury - Fuzzy mathematics - Fuzzy synthetical evaluation - Hubei Province - Meteorological elements - Production layout - South-to-North  - Theoretical basis - Thermal injuries
Classification code:443.1 Atmospheric Properties - 484 Seismology - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.12.051
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 45>

Accession number:20111013735445Title:Effects of contour grass hedges on soil and water losses of sloping cropland in Beijing
Authors:Yu, Dingfang (1); Dai, Quanhou (1); Wang, Qinghai (2); Xiao, Bo (2)
Author affiliation:(1) College of Forest, Guizhou University, Guiyang 550025, China; (2) Research and Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Corresponding author:Xiao, B.
      (xiaoboxb@gmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:89-96
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The soil and water conservation effects of pennisetum (Pennisetum alopecuroides (Linn.) Spreng) and Arundinella (Arundinella hirta (Thunb.) C.Tanaka) grass hedges were studied under simulated rainfall and natural rainfall on fallow sloping lands (5%, 10%, 15%, 20%). The results showed that the runoff and soil loss were significant reduced by arundinella and pennisetum hedges, and the decreasing degree of pennisetum hedges was higher than that of arundinella hedges. Under natural rainfall (average rainfall intensity was 13.3 mm/h), the runoff and soil loss on plots with pennisetum hedges were decreased by 72.7% and 86.3% respectively, and on plots with arundinella hedges were decreased by 53.8% and 64.1% respectively. Under simulated rainfall (average rainfall intensity was 49.5 mm/h), the runoff and soil loss of plots with pennisetum hedges were decreased by 80.7% and 94.5% respectively, and on plots with arundinella hedges were decreased by 59.5% and 71.5% respectively. In addition, there was a negative relationship between slope gradient and corresponding soil and water conservation effects. The function of two grass hedges in preventing soil and water loss gradually decreased with the increasing of slope gradient. However, the protective functions of grass hedges could keep above 40% for runoff and 50% for soil loss. According to the results of optimal scaling regression, the presence of grass hedges had become the dominant factors followed by slope gradient and rainfall intensity in controlling soil and water loss on sloping croplands. The results can provide references for the application of grass hedges technique and protection of soil and water loss on sloping croplands in Beijing or Northern China.
Number of references:26
Main heading:Rain
Controlled terms:Erosion - Fences - Reservoirs (water) - Runoff - Slope protection - Soil conservation - Soils - Water conservation
Uncontrolled terms:Contour grass hedges - Dominant factor - Northern China - Protective function - Rainfall intensity - Simulated rainfall - Slope gradients - Sloping cropland - Sloping land - Soil and water conservation  - Soil and water loss - Soil loss
Classification code:483 Soil Mechanics and Foundations - 444.1 Surface Water - 444 Water Resources - 483.1 Soils and Soil Mechanics - 443.3 Precipitation - 407 Maritime and Port Structures; Rivers and Other Waterways - 402 Buildings and Towers - 441.2 Reservoirs
DOI:10.3969/j.issn.1002-6819.2010.12.015
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 46>

Accession number:20111013735455Title:Experimental research on radiation efficiency of the gear-cover of 4100QB diesel engine
Authors:Li, Min (1); Shu, Gequn (2); Liang, Xingyu (2)
Author affiliation:(1) School of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China; (2) State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Corresponding author:Li, M.
      (limin@tju.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:148-152
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:Radiation efficiency of 4100QB diesel engine gear-cover was investigated by using the Discrete Calculation Method (DCM). Through comparing the radiation efficiency caused by two different exciting methods, exciting the installing steel plate and exciting on gear-cover, the influence of exciting point on radiation efficiency of gear-cover was discussed, and the experimental results of three gear-covers showed that the stiffness affect the radiation efficiency significantly. The stiffness of gear-cover shrinks the high efficiency range within 600 Hz to 1000 Hz, reduces the radiation efficiency, meanwhile, enlarges the high efficiency range within 1000 Hz to 2000 Hz, and increases the radiation efficiency. The paper shows that the changing of structure of thin cover parts should be taken into account when solving the noise problem.
Number of references:10
Main heading:Radiation
Controlled terms:Diesel engines - Noise pollution - Stiffness
Uncontrolled terms:Calculation methods - Experimental research - Gear-cover - High efficiency - Noise problems - Radiation efficiency - Steel plates
Classification code:421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 461.7 Health Care - 612.2 Diesel Engines - 711 Electromagnetic Waves - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2010.12.025
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 47>

Accession number:20111013735446Title:Spatial heterogeneity of soil salinity in typical arid area based on electromagnetic induction
Authors:Li, Xiaoming (1); Yang, Jingsong (1); Liu, Meixian (1); Liu, Guangming (1); Yao, Rongjiang (1)
Author affiliation:(1) Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Corresponding author:Yang, J.
      (jsyang@issas.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:97-101
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 research the spatial heterogeneity of soil salinity in arid areas for guiding the agriculture production, mobile electromagnetic induction (EM) survey with EM38 and EM31 was performed to measure apparent soil electrical conductivity (EC<inf>a</inf>). 27 calibration sites samples were selected for EC<inf>a</inf> measurements at the same time, then the EM interpretation model on soil salinity was established. The experimental results showed a good correlation between the soil salinity and the EC<inf>a</inf> data of H38 and H31 which were respectively measured by EM38 and EM31 in horizontal mode in the arid area (R=0.935). The soil salinity spatial distribution can be studied by EC<inf>a</inf> data combined with GIS and geo-statistics techniques. Two ways were introduced for research in the paper: one was that the soil salinity on EM survey sites was interpreted by the interpretation model, then the spatial distribution was studied by geo-statistics technique; the other was that the spatial distribution maps of H38 and H31 were studied by geo-statistics technique, then the soil salinity was calculated with the interpretation model by rater calculator. The precision test showed the former way had better accuracy, which the correlation between the measured values and the predicted values was better (R²: 0.888&gt;0.873), and the standard error was less than the latter (0.414&lt;0.426). The results indicate that the research on spatial heterogeneity of soil salinity with electromagnetic induction (EM) in arid areas is reliable, and has important significance for rapid survey on soil salinization, guidance of agriculture production and development of precise agriculture.
Number of references:16
Main heading:Soil surveys
Controlled terms:Agriculture - Arid regions - Electric conductivity - Electromagnetic induction - Geologic models - Inductance measurement - Research - Salinity measurement - Soils - Spatial distribution
Uncontrolled terms:Arid area - Calibration site - EM surveys - Geo-statistics - Good correlations - Interpretation model - Precise agriculture - Soil electrical conductivity - Soil salinity - Soil salinization  - Spatial distribution map - Spatial heterogeneity - Standard errors
Classification code:942.2 Electric Variables Measurements - 921 Mathematics - 901.3 Engineering Research - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 701.1 Electricity: Basic Concepts and Phenomena - 483.1 Soils and Soil Mechanics - 481.1 Geology - 444 Water Resources - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2010.12.016
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 48>

Accession number:20111013735432Title:Exploration on anti-frost heave mechanism of self-adjusting lining canal based on computer simulation
Authors:Liu, Xudong (1); Wang, Zhengzhong (1); Yan, Changcheng (1); Li, Jialin (1)
Author affiliation:(1) Research Center of Water Engineering Safety and Disaster Prevention, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) State Key Laboratory of Frozen Soil Engineering, Chinese Academy of Sciences, Lanzhou 730000, China; (3) Water Conservancy Government Department of Gansu Province, Lanzhou 730000, China; (4) Water Conservancy Bureau of Wujiang County, Wujiang 215200, China
Corresponding author:Wang, Z.
      (wangzz0910@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:6-12
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:Self-adjusting lining canal can adapt to frost-heaving deformation. In order to explore its effect and mechanism of anti-frost heave, finite element software ADINA was applied to simulate canal heaving process, and calculate the temperature field, deformation field and stress field, and study the rules of lining plate about stresses and deformation. Compared with trapezoidal canal with curved slop toe, self-adjusting lining canal can reduce maximum normal frost heaving quantity by 55.11%, maximum normal frost-heave force by 51.65% and tangential adfreezing force by 56.85%. It also can make frost heaving distribution more uniform to reform stress states remarkably. Total normal dislocation value between lining plates is 1.3 cm and total circumferential compression value of longitudinal elastic joints is 9.7 cm. This fact demonstrates that self-adjusting lining canal can makes full use of the joints to release normal deformation and absorb the circumferential, which is the mechanism of anti-frost heave. Sensitivity analysis of mean square deviation of frost heaving quantity to slope ratio shows that the best effect of anti-frost heave will be achieved while setting slope ratio i between 1:1.7 and 1:1.4. These works will provide scientific reference for further application and optimization design of self-adjusting lining canal.
Number of references:21
Main heading:Canal linings
Controlled terms:Computer simulation - Computer software - Deformation - Hydraulic structures - Linings - Numerical analysis - Sensitivity analysis
Uncontrolled terms:Analysis of means - Anti-frost heave mechanism - Deformation field - Elastic joints - Finite element software - Frost heave - Frost heaving - Longitudinal joint - Optimization design - Self-adjusting  - Self-adjusting lining canal - Stress field - Stress state - Temperature field - Trapezoidal canal
Classification code:951 Materials Science - 921.6 Numerical Methods - 921 Mathematics - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 611 Hydroelectric and Tidal Power Plants - 441 Dams and Reservoirs; Hydro Development - 434 Waterway Transportation - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 405 Construction Equipment and Methods; Surveying
DOI:10.3969/j.issn.1002-6819.2010.12.002
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 49>

Accession number:20111013735438Title:Winter wheat irrigation schedule on stochastic precipitation
Authors:Wang, Shengfeng (1); Duan, Aiwang (2); Zhang, Zhanyu (4); Xu, Jianxin (1)
Author affiliation:(1) Department of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450011, China; (2) Key and Open Laboratory of Crop Water Requirements Regulation, Ministry of Agriculture, XinXiang 453003, China; (3) Farmland Irrigation Research Insurance, Chinese Academy of Agricultural Science, XinXiang 453003, China; (4) Water Conservancy and Hydropower Engineering, Hohai University, NanJing 210098, China
Corresponding author:Duan, A.
      (duanaiwang@yahoo.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:47-52
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to Monte Carlo method and 30 years meteorological data of Guangli irrigation district, precipitation of long series (500 years) were obtained. And basic parameters of winter wheat water consumption was studied though 2 years field experiments. Winter wheat irrigation schedules of all years were studied on this base, furthermore, irrigation patterns of all years were analyzed. The results showed that under irrigation quota on each application changed by 30 mm step-size, wintering period and jointing stage needed 30 mm irrigation water respectively, and the probability of highyield was 1% when irrigation quota was 60 mm. With wintering period and green stage irrigation for 30 mm respectively, jointing stage for 60 mm, the probability of highyield was 12% when irrigation quota was 120 mm. With wintering period and filling stage irrigation for 30 mm respectively, green stage and jointing stage irrigation for 60 mm respectively, the probability of highyield was 62.8% when irrigation quota was 180 mm. With jointing stage and heading stage irrigation for 60 mm respectively, others for 30 mm, the probability of highyield was 98.8% when irrigation quota was 240 mm. The research enriches the measures of winter wheat irrigation schedules, and can provide technical support of scientific water usage of winter wheat.
Number of references:20
Main heading:Irrigation
Controlled terms:Meteorology - Monte Carlo methods - Probability - Stochastic models - Stochastic systems - Water supply
Uncontrolled terms:Basic parameters - Field experiment - Filling stage - Irrigation districts - Irrigation patterns - Irrigation quotas - Irrigation schedule - Irrigation waters - Meteorological data - Technical support  - Water consumption - Water usage - Winter wheat
Classification code:443 Meteorology - 446.1 Water Supply Systems - 821.3 Agricultural Methods - 922.1 Probability Theory - 922.2 Mathematical Statistics - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2010.12.008
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 50>

Accession number:20111013735492Title:Application of visible and near infrared spectroscopy to identification of navel orange varieties using SIMCA and PLS-DA methods
Authors:Hao, Yong (1); Sun, Xudong (1); Gao, Rongjie (1); Pan, Yuanyuan (1); Liu, Yande (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, East China Jiaotong University, Nanchang 330013, China
Corresponding author:Liu, Y.
      (jxliuyd@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:373-377
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 superior varieties breeding for navel orange is completed by the selection of bud mutation, and it is necessary to identify navel orange varieties in order to select some specialized character varieties for the cultivation. In this study, near infrared spectroscopy (NIRS) coupled with Soft Independent modeling of class analogy (SIMCA) and Partial Least Squares-Discriminant Analysis (PLS-DA) pattern recognition methods were used to identify the navel orange varieties. The results showed that four navel orange varieties were well identified by raw NIR spectra and SIMCA models, the identification rates were all 100%. For PLS-DA models, the correlations between the predicted category variables of calibration or validation and the measured category variables were all remarkable with a correlation coefficient (r) over 0.970 and low RMSECV and RMSEP (&lt;0.100); The discrimination accuracy for the navel orange varieties was 100% by PLS-DA model based on the validation set of samples. It is suggested that Vis/NIR spectroscopy coupled with SIMCA and PLS-DA methods can be used for rapid detection of navel orange in superior varieties breeding.
Number of references:10
Main heading:Least squares approximations
Controlled terms:Discriminant analysis - Infrared devices - Near infrared spectroscopy - Pattern recognition
Uncontrolled terms:Gannan - Navel orange - PLS-DA - Soft independent modeling of class analogy (SIMCA) - Variety identification
Classification code:716 Telecommunication; Radar, Radio and Television - 741.3 Optical Devices and Systems - 921.6 Numerical Methods - 922 Statistical Methods
DOI:10.3969/j.issn.1002-6819.2010.12.063
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 51>

Accession number:20111013735449Title:Design and test on seed metering device with variable capacity model-hole roller
Authors:Tang, Chuzhou (1); Luo, Haifeng (1); Wu, Mingliang (1); Li, Ming (1)
Author affiliation:(1) College of Engineering, Hunan Agricultural University, Changsha 410128, China
Corresponding author:Luo, H.
      (luohaifeng1976@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:114-119
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to solve the problems along with adjusting the seeding capacity by using model-hole roller seed metering device, a variable capacity model-hole roller seed metering device was developed based on an eccentric model-hole roller seed meter. The variable capacity model-hole roller seed meter was composed of a model-hole roller and a control ring. Unvaried factor and multivariate factors tests were carried out with five influence factors, which included rotation speed of roller, adjustable tongue, seeding grade, speed and adjustable tongue width. The results showed that the rotation speed of roller, adjustable tongue shape and model-hole size were the key factors which affected seeding uniformity, lines uniformity and broken rate. The seed meter had a preferable performance at the rotation speed about 30-50 r/min; and the concave round tongue was better than the flat one. With length of the model-hole increasing, the seeding uniformity, lines uniformity were improved and broken rate decreased. The seed meter is suitable for drilling for all types of small-size seeds with the designed structural dimension.
Number of references:15
Main heading:Rollers (machine components)
Controlled terms:Design - Oilseeds - Rotation
Uncontrolled terms:Adjustment - Capacity - Design and tests - Hole size - Influence factors - Key factors - Rapeseed - Rotation speed - Seed metering devices - Structural dimensions  - Variable capacity
Classification code:408 Structural Design - 601.1 Mechanical Devices - 601.2 Machine Components - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.12.019
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 52>

Accession number:20111013735469Title:Remote sensing image fusion by multi-ary wavelet transform combining multiple dimension texture features
Authors:Wu, Yanbin (1); Fu, Meichen (3); Li, Liangjun (4)
Author affiliation:(1) State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China; (2) School of Business Administration, Hebei University of Economic and Business, Shijiazhuang 050016, China; (3) School of Land Sciences and Technology, China University of Geosciences, Beijing 100083, China; (4) Public Geological Survey Management Center of Anhui Province, Hefei 230001, China
Corresponding author:Wu, Y.
      (wuyanbin080@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:231-236
Language:English
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The remote sensing image fusion method based on multi-band wavelet combining with multiple dimension texture features was discussed. In the fusion process, the high resolution panchromatic image and multi-spectral image were decomposed with multi-ary wavelet first and then local variance, local average grads, local energy and local information entropy texture features were extracted. After that the high frequency ingredients of high resolution image and R, G, B bands image by multi-band wavelet transform were fused based on combing multiple criteria of multiple dimension texture features and the high frequency ingredients of high resolution image was formed. The inverse multi-band wavelet transform was done based on low frequency ingredients of R, G, B bands image and new high frequency ingredients separately. Using 3-band wavelet transform, the fusion of 10 m resolution SPOT panchromatic and 30 m resolution TM image in Huainan mine was experimented. Visual interpretation (qualitative evaluation), spectral curve analysis and quantitative evaluation were applied to assess the method. The results show that this method can not only improve the definition and resolution of the multi-spectral image, but also retain the color feature.
Number of references:12
Main heading:Image fusion
Controlled terms:Image reconstruction - Quality control - Remote sensing - Textures - Wavelet transforms
Uncontrolled terms:Color features - Fusion process - High frequency - High resolution - High resolution image - Local average - Local energy - Local information - Local variance - Low frequency  - Multi-ary wavelet - Multi-band wavelet - Multiple criteria - Multiple dimension texture features - Multiple dimensions - Multispectral images - New high - Panchromatic images - Qualitative evaluations - Quantitative evaluation  - Remote sensing images - Spectral curves - Texture features - TM image - Visual interpretation
Classification code:723.2 Data Processing and Image Processing - 731.1 Control Systems - 913.3 Quality Assurance and Control - 921.3 Mathematical Transformations - 933 Solid State Physics
DOI:10.3969/j.issn.1002-6819.2010.12.039
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 53>

Accession number:20111013735464Title:Spatial interpolation of soil properties based on soil types and trace micro-elements
Authors:Shi, Shuqin (1); Chen, Youqi (1); Li, Zhengguo (1); Yang, Peng (1); Wu, Wenbin (1); Yao, Yanmin (1)
Author affiliation:(1) Key Laboratory of Resources Remote-Sensing and Digital Agriculture of Ministry of Agriculture, Beijing 100081, China; (2) School of Management, Tianjin Polytechnic University, Tianjin 300387, China; (3) Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Corresponding author:Chen, Y.
      (chenyqi@mail.caas.net.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:199-205
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 develop the methodology for spatialization of large scale soil property, we firstly investigated the relationship between soil properties and environmental factors in Jilin province located in Northeast China. Secondly, with a consideration of soil types, the relevant factors were utilized as co-factors for interpolating soil properties by using the means of Cokriging technique. The results showed that soil pH value, soil organic matter and alkali-hydrolyzable N were generally correlated with latitude and longitude. In details, soil pH value had an obviously negative correlation with longitude (-0.66), available iron (-0.71), manganese (-0.70) and active nitrogen (-0.67); Negative correlation could be found between soil organic matter and soil pH value (-0.58), while positive between soil organic matter and longitude (0.55), available calcium (0.560) and manganese (0.52); in addition, alkali-hydrolyzable N was negatively correlated with soil pH (-0.67) and latitude (-0.57), and positively correlated with longitude (0.57), available iron (0.56) and zinc (0.54); and active phosphorus had an obviously positive correlation with active potassium (0.67) and zinc (0.64). By contrast, the accuracy of Cokriging interpolations used with more relevant co-factors (i.e. trace elements) was obviously higher than the interpolations with other factors (i.e. topographic factors). In addition, the verification results of cross-validation and testing station also prove that accuracy of Cokrigng interpolations is higher than ordinary Kriging.
Number of references:15
Main heading:Soils
Controlled terms:Agricultural chemicals - Biogeochemistry - Biological materials - Computational methods - Computer simulation - Interpolation - Ionization of gases - Manganese - Organic compounds - pH  - Phosphorus - Potassium - Trace elements - Zinc
Uncontrolled terms:Co-Kriging - Cross validation - Environmental factors - Jilin Province - Negative correlation - Northeast China - Ordinary kriging - Positive correlations - Soil organic matters - Soil pH  - Soil property - Soil types - Spatial interpolation - Spatialization - Verification results
Classification code:921.6 Numerical Methods - 921 Mathematics - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.2 Chemical Reactions - 801.2 Biochemistry - 801.1 Chemistry, General - 723.5 Computer Applications - 549.1 Alkali Metals - 546.3 Zinc and Alloys - 543.2 Manganese and Alloys - 483.1 Soils and Soil Mechanics - 461.2 Biological Materials and Tissue Engineering
DOI:10.3969/j.issn.1002-6819.2010.12.034
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 54>

Accession number:20111013735444Title:Projection pursuit model for evaluating drought based on improved artificial fish swarm algorithm of Sanjiang Plain
Authors:Ding, Hong (1); Liu, Dong (1); Li, Tao (1)
Author affiliation:(1) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; (2) Postdoctoral Scientific Research Mobile Station of Agriculture and Forestry Economic Management, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Liu, D.
      (liu72dong@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:84-88
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:Projection pursuit model for comprehensive evaluation of drought was established by using artificial fish swarm. It was superior to the existing methods which might cause many problems such as discrete evaluation grade and barely recognizable results. Artificial fish swarm algorithm (AF) was introduced to optimize the function and seek the optimum projection vector, and it was improved by using the adaptive artificial fish step and crowded degree factor. Compared to the previous methods, it overcame the shortcomings which were easily to fall into local extreme optimum and improved the global search ability and convergence speed. Taking Hongxinglong Branch Bureau of Sanjiang Plain as the research objects, the departure ratio of rain-fall, Z index and homogenization of rain-temperature were selected to establish drought assessment model based on above methods. The results showed that the model could avoid the incompatibility of single indexes. The improved projection pursuit method is feasible to evaluate the drought.
Number of references:23
Main heading:Drought
Controlled terms:Algorithms - Fish - Rain
Uncontrolled terms:Adaptive - Artificial fish - Artificial fish swarm algorithms - Assessment models - Comprehensive evaluation - Convergence speed - Existing method - Global search ability - Local extremes - Projection pursuit  - Projection pursuit method - Projection pursuits - Projection vectors - Research object - Sanjiang plain
Classification code:921 Mathematics - 822 Food Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723 Computer Software, Data Handling and Applications - 471 Marine Science and Oceanography - 461 Bioengineering and Biology - 443.3 Precipitation
DOI:10.3969/j.issn.1002-6819.2010.12.014
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 55>

Accession number:20111013735476Title:Optimization on parameters of solid-liquid separation process of dairy manure by screw press
Authors:Guan, Zhengjun (1); Li, Wenzhe (1); Yang, Baisong (2); Zheng, Guoxiang (1)
Author affiliation:(1) College of Engineering, Northeast Agricultural University, Harbin 150030, China; (2) Heilongjiang Provincial Academy of Land Reclamation, Harbin 150030, China
Corresponding author:Li, W.
      (liwenzhe9@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:276-279
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 optimizing the process of solid-liquid separation of manure, fresh dairy manure was separated using the developed solid-liquid separator. The water-food ratio, article squeeze gap and screw speed were selected as influence factors, total solid content (TS) after separation was as main inspected target, meantime, productivity of treated dairy manure and solid removal ratio of solid-liquid mixture were selected as independent variables. Based on the quadratic orthogonal rotating combinatorial method with three factors and five levels employed to design the experimental procedure, the effects of independent variables of screw extruded process on solid-liquid separation were analyzed. An optimum independent parameters combination for highest solid TS value of 40% was obtained with water-food ratio of 0.65, article squeeze gap of 1.5 mm and screw speed of 68 r/min. The research results can provide a reference for solid-liquid separation process of dairy manure.
Number of references:17
Main heading:Liquids
Controlled terms:Fertilizers - Manures - Optimization - Presses (machine tools) - Screws - Water content
Uncontrolled terms:Combinatorial method - Dairy manures - Experimental procedure - Independent parameters - Independent variables - Influence factors - Presses - Research results - Screw press - Screw speed  - Solid removal - Solid-liquid mixtures - Solid-liquid separation - Solid-liquid separators - Total solid content
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 921.5 Optimization Techniques - 804 Chemical Products Generally - 605 Small Tools and Hardware - 603.1 Machine Tools, General - 452.3 Industrial Wastes - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.12.047
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 56>

Accession number:20111013735484Title:Stochastic simulation of cultivated soil organic matter spatial variability
Authors:Yang, Qiyong (1); Yang, Jinsong (1); Yao, Rongjiang (1); Huang, Biao (1); Sun, Weixia (1)
Author affiliation:(1) Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Corresponding author:Yang, J.
      (jsyang@issas.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:324-329
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 organic matter is one of important features of soil fertility. Studying the spatial variability of the soil organic matter can provide consults to improve the saline soil quality. Based on plentiful information that obtained by field-survey, soil sampling and lab analysis, the study was conducted on an area of typical saline soil improvement districts in Yucheng City. The unobserved values of soil organic matter were estimated by sequential Gaussian Simulation to achieve variance (SGSV), sequential Gaussian simulation of the average achieved (SGSA) and the ordinary Kriging interpolation (OK) were applied on cultivated soil organic matter. Their statistic characteristics, semi-variances and spatial distribution trend were compared. The results indicated that the estimated values by OK and SGSA changed the original data configuration with obviously smoothing-average effect, and SGSA was better than OK method in eliminating smoothing-average effects. While SGSV had the same data configuration as the measured values, and the simulated value was uncertain for the unobserved points. So SGSV was efficient in analyzing the uncertain and risk variants of soil organic matter, and could bring some negative effect on uncertain and risk variants.
Number of references:17
Main heading:Stochastic models
Controlled terms:Biogeochemistry - Biological materials - Computer simulation - Geologic models - Interpolation - Organic compounds - Soils - Stochastic systems
Uncontrolled terms:Kriging - Organic matter - Semi-variances - Spatial variables - Stochastic simulations
Classification code:961 Systems Science - 922.1 Probability Theory - 921.6 Numerical Methods - 804.1 Organic Compounds - 723.5 Computer Applications - 483.1 Soils and Soil Mechanics - 481.2 Geochemistry - 481.1 Geology - 461.2 Biological Materials and Tissue Engineering
DOI:10.3969/j.issn.1002-6819.2010.12.055
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 57>

Accession number:20111013735475Title:Combustion characteristics of emulsified fuel from bio-oil/diesel oil
Authors:Zhang, Ximei (1); Bai, Xueyuan (1); Wang, Lihong (1); Cai, Hongzhen (1); Li, Yongjun (1)
Author affiliation:(1) School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255091, China
Corresponding author:Bai, X.
      (Baixy@sdut.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:271-275
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:Pyrolysis derived bio-oil was emulsified by diesel oil with complex of nonionic surfactants. The density, calorific value, dynamic viscosity and pH value of the emulsified fuel were measured. The performance of bio-oil/diesel oil emulsified fuels with four different bio-oil/diesel oil ratios were tested on a SD1110 diesel engine, and the engine load characteristics and exhaust emission characteristics curves of diesel engine were determined. Then, the fuel economy and exhaust emission characteristics of the engine fueled with the emulsified fuel were analyzed in comparison with that of the pure No.0 diesel oil. The experimental results showed that the specific fuel consumption was the lowest, when the engine was fueled with the emulsified fuel containing about 20% volume fraction of bio-oil. CO emission of emulsified fuel was higher than that of diesel oil, and the high concentration of bio-oil was, the more CO emission was. But the NO and smoke emissions of the emulsified fuels were lower than that of the pure No.0 diesel oil. Since its physical and chemical characteristics are similar to that of diesel, bio-oil/diesel oil emulsified fuel can be used to fuel diesel engines.
Number of references:14
Main heading:Diesel engines
Controlled terms:Combustion - Diesel fuels - Emulsification - Engines - Fuel consumption - Fuel economy - Nonionic surfactants - Pyrolysis
Uncontrolled terms:Bio oil - CO emissions - Combustion characteristics - Diesel oil - Dynamic viscosities - Emission - Emulsified fuel - Engine load - Exhaust emission - High concentration  - Oil ratio - pH value - Physical and chemical characteristics - Smoke Emission - Specific fuel consumption
Classification code:803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 802.2 Chemical Reactions - 612.2 Diesel Engines - 612 Engines - 521.1 Fuel Combustion - 521 Fuel Combustion and Flame Research
DOI:10.3969/j.issn.1002-6819.2010.12.046
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 58>

Accession number:20111013735441Title:Verification and numerical simulation for water flow and heat transport under drip irrigation
Authors:Wang, Jiandong (1); Gong, Shihong (1); Xu, Di (1); Ma, Xiaopeng (1); Yu, Yingduo (1)
Author affiliation:(1) Irrigation and Drainage Department, China Institute of Water Resources and Hydropower Research, Beijing 100048, China; (2) National Center of Efficient Irrigation Engineering and Technology Research, Beijing 100048, China
Corresponding author:Wang, J.
      (wangjd@iwhr.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:66-71
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The soil and water distribution condition is one of the key parameters for crop good quality and high yields, and the mathematical model was set up on the basis of combining soil water and heat moving basic equations with water moving features under drip irrigation. The HYDRUS-2D software was used to solve the mathematical model. The simulation value and the observation value gained from field measurement were compared. The results showed that the mathematical model could be commendably used to describe the soil water and heat transport properties, and the mathematical model could be used for monitoring and adjusting soil water and heat distribution in time when the soil information and weather data and drip irrigation arrangements could be attained. In addition, the comparison result between simulation value and the observation value revealed that the soil water and heat value in the upper soil layer was obviously affected by soil evaporation and atmosphere temperature fluctuation compared with deeper soil layer.
Number of references:16
Main heading:Mathematical models
Controlled terms:Computer simulation - Geologic models - Heat transfer - Irrigation - Soil moisture - Transport properties - Upper atmosphere - Water supply systems
Uncontrolled terms:Atmosphere temperature - Basic equations - Comparison result - Drip irrigation - Field measurement - Heat distribution - Heat transport - Heat transport property - Heat value - High yield  - HYDRUS-2D - Key parameters - Numerical simulation - Soil and water - Soil layer - Soil water - Water flows - Weather data
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 921 Mathematics - 821.3 Agricultural Methods - 723.5 Computer Applications - 641.2 Heat Transfer - 483.1 Soils and Soil Mechanics - 481.1 Geology - 446.1 Water Supply Systems - 443.1 Atmospheric Properties
DOI:10.3969/j.issn.1002-6819.2010.12.011
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 59>

Accession number:20111013735435Title:Field evaluation of drip fertigation uniformity effects on distributions of water and nitrogen in soil
Authors:Li, Jiusheng (1); Yin, Jianfeng (2); Zhang, Hang (1); Li, Yanfeng (1)
Author affiliation:(1) China Institute of Water Resources and Hydropower Research, Beijing 100048, China; (2) College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Li, J.
      (lijs@iwhr.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:27-33
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 effects of drip fertigation uniformity and nitrogen applied on the distributions of water and nitrate in soil were investigated in a solar heated greenhouse in the growing season of Chinese cabbage to determine the design and evaluation standards of drip irrigation uniformity. Three Christiansen uniformity coefficients of 0.62, 0.80 and 0.96 and two levels of nitrogen applied at 150 and 300 kg/hm² were used. The distributions of soil water content and bulk electrical conductivity were monitored continuously by equally spaced TDR sensors (Hydra Probe) along a dripline. Gravimetric samples of soil around each TDR sensor were collected regularly to determine the distributions of nitrate and ammonium nitrogen contents. A substantially high uniformity coefficient of soil water content was observed during the whole growing season for all three fertigation uniformity tests. The effects of fertigation uniformity and nitrogen applied on the mean and the uniformity of water in soil were insignificant at a significance level of 0.05. The uniformity coefficient of soil bulk electrical conductivity and nitrate in soil was substantially lower than that of soil water content, being greatly dependent upon the nonuniformity of initial nitrogen contents in the soil. An insignificant influence of fertigation uniformity on the uniformity of soil bulk electrical conductivity and nitrate content in soil was also observed. It was supported by this study that lower uniformity values of drip irrigation system than those recommended by the current standards could be used if the system mainly aimed at producing a uniform distributions of water and nitrogen in the soil.
Number of references:15
Main heading:Water content
Controlled terms:Ammonium compounds - Electric conductivity - Irrigation - Nitrates - Nitrogen - Sensors - Soil moisture
Uncontrolled terms:Ammonium nitrogen - Chinese cabbage - Drip irrigation - Drip irrigation systems - Electrical conductivity - Evaluation standard - Fertigations - Field evaluation - Gravimetric samples - Growing season  - High uniformity - Nitrogen content - Nonuniformity - Soil water content - Solar-heated greenhouse - TDR - TDR sensor - Uniform distribution - Uniformity coefficient
Classification code:821.3 Agricultural Methods - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 801 Chemistry - 701.1 Electricity: Basic Concepts and Phenomena - 483.1 Soils and Soil Mechanics - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.12.005
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 60>

Accession number:20111013735434Title:Impacts of water-retaining agent on soil moisture and water use in different growth stages of winter wheat
Authors:Yang, Yonghui (1); Wu, Pute (1); Wu, Jicheng (2); Zhao, Shiwei (1); Zhao, Xining (3); Huang, Zhanbin (4); He, Fang (2)
Author affiliation:(1) College of Resource and Environment, Northwest A and F University, Yangling 712100, China; (2) Institute of Plant Nutrition and Resource Environment, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; (3) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (4) China University of Mining and Technology-Beijing, Beijing 100083, China
Corresponding author:Wu, P.
      (gjzwpt@vip.sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:19-26
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 ascertain the mechanism of water-retaining agent on soil moisture and water use in different growth stage of winter wheat, a field experiment in hilly and drought farming region of western Henan province was conducted to investigate the effects of water-retaining agent on holding moisture, characteristics of water consumption of crop, and water use efficiency (WUE) in different reproductive stage. The results indicated that soil moisture in 0-100 cm soil layer was increased, biomass accumulation was raised, water consumption of winter wheat was decreased, yield and WUE were all increased after applying water-retaining agent. While the soil moisture and storage capacity of treatment with 60 kg/hm² and 90 kg/hm² of water-retaining agent at each growth were higher than that with other treatments, but water consuption was lower. What's more, from sowing to jointing stage, the biomass of winter wheat increased with the increase of water-retaining agent. Jointing-booting and filling-harvest, the biomass of treatment 60 kg/hm² of water-retaining agent had the most increasing compared with other treatments. But from booting to filling stage, the biomass of treatment 30 kg/hm² of water-retaining agent increased evidently compared with other treatments. At different growth stages, WUE of treatment with 60 kg/hm² of water-retaining agent was the highest among different treatments except for booting-filling stage. It was concluded that yield and WUE of treatment with 60 kg/hm² of water-retaining agent were the highest among different treatments, and compared to control, increased by 47.4% and 10.6 kg/(mm&middothm²) respectively.
Number of references:27
Main heading:Ecology
Controlled terms:Biomass - Crops - Filling - Moisture determination - Soil moisture - Water supply
Uncontrolled terms:Biomass accumulation - Field experiment - Filling stage - Growth stages - Henan Province - Reproductive stage - Soil layer - Storage capacity - Water consumption - Water use  - Water-retaining agents - Water-use efficiency - Winter wheat - WUE
Classification code:944.2 Moisture Measurements - 821.5 Agricultural Wastes - 821.4 Agricultural Products - 691.2 Materials Handling Methods - 483.1 Soils and Soil Mechanics - 454.3 Ecology and Ecosystems - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2010.12.004
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 61>

Accession number:20111013735479Title:Optimization and analysis of bio-fuel logistics for biomass power plant
Authors:Yu, Hongde (1); Wang, Qinhui (1); Ileleji, Klein E. (2); Yu, Chunjiang (1); Luo, Zhongyang (1); Cen, Kefa (1)
Author affiliation:(1) Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China; (2) School of Agricultural and Biological Engineering, Purdue University, West Lafayette, 47907-2093, United States
Corresponding author:Wang, Q.
      (qhwang@cmee.zju.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:293-297
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This paper established a logistics model involving biomass delivery and processing between satellite storages and plant, to simulate, monitor and analyze various logistics alternatives based on the software of EXTEND v6 in the case study of biomass power plant. The model aimed to reduce truck waiting time before receiving processing and minimizing the overall variable logistics cost by adjusting the number of processing facilities and trucks allocated to different satellite storages at the prerequisite of stable biomass supply. The model gave optimal values of related parameters and the minimum logistics cost, and investigated influence of installed capacity of power plant, processing time of equipment and working schedule of trucks on logistics cost. It was found that logistics cost reaches minimum at installed capacity of 100-125 MW, the cost is most sensitive to loading time, and the optimal working time for trucks is 16 hours.
Number of references:16
Main heading:Costs
Controlled terms:Automobiles - Biomass - Fuels - Optimization - Power plants - Trucks
Uncontrolled terms:Biomass power plants - Biomass supply - EXTEND - Installed capacity - Loading time - Logistics costs - Logistics model - Optimal values - Processing facilities - Processing Time  - Waiting-time - Working time
Classification code:921.5 Optimization Techniques - 911 Cost and Value Engineering; Industrial Economics - 706 Electric Transmission and Distribution - 663.1 Heavy Duty Motor Vehicles - 662.1 Automobiles - 525.1 Energy Resources and Renewable Energy Issues - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels
DOI:10.3969/j.issn.1002-6819.2010.12.050
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 62>

Accession number:20111013735453Title:Lubricating model of conical spindle distributing flow pair and arithmetic of model
Authors:Zou, Yunfei (1); Jing, Chongbo (2); Liu, Jinchuan (1)
Author affiliation:(1) Waterborne Transportation Institute, Beijing 100088, China; (2) Machinery and Vehicle School, Beijing Institute of Technology, Beijing 100081, China
Corresponding author:Zou, Y.
      (bitzouyunfei2010@yahoo.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
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 solve the lubricating model of the conical spindle distributing flow pair, two elements and two objects complex method was established by using the finite difference method, the resistance network method and the complex method. The research proved that the solution of model had the existence and uniqueness, and the method was proved to be feasible by example. The results of the example showed that the dimensionless pressure of the balance grooves kept constant and the clearance of the distributing flow plane had a nearly linear relationship with the working pressure. But the eccentricity of the conical spindle distributing flow pair was less than zero slightly, and the minimum value was -0.036. The study can provide a reference for analysis on lubricating characteristics and design of the conical spindle distributing flow pair.
Number of references:23
Main heading:Numerical methods
Controlled terms:Finite difference method - Lubrication
Uncontrolled terms:Complex method - Complex methods - Conical spindle distributing flow pair - Existence and uniqueness - Linear relationships - Minimum value - Resistance network - Resistance network method - Working pressures
Classification code:607.2 Lubrication - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2010.12.023
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 63>

Accession number:20111013735468Title:Wireless data transmission system of apple harvesting robot
Authors:L&#252;, Jidong (1); Zhao, De'an (1); Ji, Wei (1); Guo, Jinliang (1); Li, Zhankun (1)
Author affiliation:(1) School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Zhao, D.
      (dazhao@ujs.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:225-230
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 problems of chaotic and massive data link and inconvenient maintance usually existed in transducer data wired transmission on the apple picking robot. In addition, terminal actuators and transducers were very easy to fall apart and intertwine when translational joints stretched out and drew back. In order to solving these problems, the wireless transmission of transducer data was studied. The integrated design of communication module circuit, USB communication circuit and signal conditioning circuit for part transducer were applied. The wireless transmission of transducer data was programmed. The quality and efficiency of integrated design and protocol of data transmission were controlled and formulated to achieve real-time and reliable wireless transmission. The results showed that protocol of wireless transmission had good robustness, wireless transmission of transducer data had higher efficiency. The design parameters were optimized by considering experimental results and system overhead. The wireless transmission of transducer data is feasible for robotics-manipulator of fruits' picking and other agricultural productions.
Number of references:18
Main heading:Radio broadcasting
Controlled terms:Data communication systems - Design - Fruits - Harvesting - Radio transmission - Radio waves - Robots - Telecommunication equipment - Transducers
Uncontrolled terms:Agricultural productions - Communication modules - Data transmission - Design parameters - Harvesting robot - Higher efficiency - Integrated designs - Massive data - Picking robot - Radio frequency  - Signal conditioning circuits - Translational joints - USB communication - Wireless data transmission - Wireless transmissions
Classification code:821.4 Agricultural Products - 821.3 Agricultural Methods - 731.5 Robotics - 723 Computer Software, Data Handling and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716.3 Radio Systems and Equipment - 716 Telecommunication; Radar, Radio and Television - 715 Electronic Equipment, General Purpose and Industrial - 704 Electric Components and Equipment - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2010.12.038
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 64>

Accession number:20111013735457Title:Technological characteristics and quantitative analysis of different conservation tillage patterns
Authors:Chen, Yuanquan (1); Li, Yuanyuan (1); Sui, Peng (1); Liu, Wuren (2); Huang, Jianxiong (1); Gao, Wangsheng (1)
Author affiliation:(1) Circular Agriculture Research Center, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; (2) Center of Agricultural Environment and Resource, Academy of Agricultural Sciences of Jilin Province, Changchun 130033, China
Corresponding author:Gao, W.
      (wshgao@cau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:12
Issue date:December 2010
Publication year:2010
Pages:161-167
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:Conservation tillage (CT) is a kind of sustainable agricultural technique to control soil erosion, protect agro-ecosystem environment and maintain the sustainable land productivity. At present, there exist many types of development patterns and technologies of China's CT, but it is lack of unified standards to identify the technological characteristics of different CT patterns. Therefore, based on the basic principles of "Three-Min. and Two-High" (minimum soil disturbance, minimum land-surface bareness, minimum field pollution, high resource conservation and high economic efficiency), an indicators system for quantitative analysis on the characteristics of CT was developed, and four kinds of CT patterns (which were "wide/narrow row alternation planting and high stubble mulching", "direct-sowing on ridge side and stand-stubble returning", "stubble mulching and direct-sowing on ridge" and "cutting stubble combine ridge with subsoiling") on maize production areas in Jilin Province were taken as case study in this paper. The results showed that the four models of CT, compared with traditional production methods, showed a certain "protective" effect, but the values of comprehensive "conservation degree" (C<inf>d</inf>) were difference, in which "direct-sowing on ridge side and stand-stubble returning" had the highest value of C<inf>d</inf> (26.65), the value of "direct-Sowing on ridge side and stand-stubble returning" was 25.37, and the one of "wide/narrow row alternation Planting and High stubble mulching" and "cutting stubble combine ridge with subsoiling" were 16.01 and 13.45, respectively.. Therefore, the choice of CT extending should give preference to the pattern with relatively high C<inf>d</inf> value, and it is need to further enhance technological research in order to improve the pattern with low value of C<inf>d</inf>.
Number of references:33
Main heading:Soil conservation
Controlled terms:Agricultural machinery - Cultivation - Optimization - Production - Standardization - Sustainable development
Uncontrolled terms:Conservation tillage - Evaluation indicator - Jilin Province - Quantitative analysis - Technologic characteristics
Classification code:821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods - 902.2 Codes and Standards - 911.2 Industrial Economics - 913.2 Production Control - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2010.12.027
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.