<RECORD 1>
Accession number:20103113111401
Title:Error modeling and simulation of open-chain linkage using virtual joint method
Authors:Du, Li (1); Huang, Yonggang (1); Zou, Changping (1); Huang, Maolin (2)
Author affiliation:(1) College of Mechanical Engineering, Chongqing Engineering and Business University, Chongqing 400067, China; (2) College of Mechanical Engineering, Chongqing University, Chongqing 400044, China
Corresponding author:Du, L.
      (dulicq@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:157-162
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With the wide application of agricultural robots, their motion accuracy draws more and more attention. Conventional error models of linkage mechanisms are based on homogeneous transformation matrix differential. The limitation is that modeling process is cumbersome, and the error transformation matrix is not homogeneous. For this reason, using screw theory, the D-H parameters errors of open-chain linkage were treated as the result of equivalent virtual joint screw motion, and the error model was established. Meanwhile, the position and orientation error of output link were represented as prismatic and revolute pair screw motion, respectively, and its calculation formula were also given. As an example, the error simulation of PUMA560 was performed via Matlab programming. Furthermore, Adams's simulation were used in verifying the established model, the difference between two methods was only 0.001 mm. The results indicate that the simulation method is effective and correct,the modeling process is simple and intuitive.
Number of references:15
Main heading:Computer simulation
Controlled terms:Error analysis - Robots
Uncontrolled terms:Agricultural robot - Calculation formula - Error analysis model - Error model - Error modeling - Error simulation - Error transformation - H-parameter - Homogeneous transformation matrix - Linkage mechanism  - Matlab programming - Modeling process - Motion accuracy - Position and orientation error - Screw motion - Screw theory - Simulation methods - Virtual joints
Classification code:723.5 Computer Applications - 731.5 Robotics - 731.6 Robot Applications - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2010.06.028
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 2>
Accession number:20103113111419
Title:Effect on increasing biogas production using rape straw by microbiological pretreatment
Authors:Wan, Chuyun (1); Huang, Fenghong (1); Liu, Rui (1); Li, Wenlin (1); Deng, Qianchun (1)
Author affiliation:(1) Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China
Corresponding author:Huang, F.
      (Huangfh@oilcrops.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:265-271
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:Rape straw treated by compound microbial fermentation was analyzed by using infrared spectra analysis apparatus and scanning electron microscope. The effects of biological pretreatment on biogas production were studied by using rape straw. The results showed that the cellulose and lignin and hemi cellulose degradation rate of rape straw, which was fermented by compound microbial agent for 11 days, reached 37.4% and 28.9% and 29.9%, respectively. The structure of pretreated straw has a great change and some crack and cavity, observed by SEM, were found in rape straw pretreated by compound microbial fermentation. The results of biogas fermentation experiment, rape straw as raw materials, showed that gas production peak daily and total biogas yield have remarkable increase, which was 37.6% and 17.8%, respectively. So, degraded the cellulose and lignin and hemi cellulose in rape straw by compound microbial inoculants could promote converting straw biomass into biogas.
Number of references:17
Main heading:Biogas
Controlled terms:Cellulose - Fermentation - Infrared spectroscopy - Lignin - Microorganisms - Photodegradation - Scanning electron microscopy
Uncontrolled terms:Biogas fermentation - Biogas production - Biological pre-treatment - Gas productions - Hemi-cellulose - Infrared spectra analysis - Microbial fermentation - Pre-Treatment - Rape straw - Scanning Electron Microscope  - SEM
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 821.5 Agricultural Wastes - 815.1.1 Organic Polymers - 811.3 Cellulose, Lignin and Derivatives - 805.1.1 Biochemical Engineering - 941.4 Optical Variables Measurements - 802.2 Chemical Reactions - 741.1 Light/Optics - 522 Gas Fuels - 461.9 Biology - 461.8 Biotechnology - 801.2 Biochemistry
DOI:10.3969/j.issn.1002-6819.2010.06.046
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 3>
Accession number:20103113111432
Title:Practicable processing parameters of pig dehairing based on testing force and work
Authors:Xu, Shulai (1); Purnell, Graham-L. (2)
Author affiliation:(1) College of Food Engineering, Harbin University of Commerce, Harbin 150076, China; (2) Research Center of Food Engineering, University of Bristol, UK BS40 5DU, United Kingdom
Corresponding author:Xu, S.
      (xumei1215@shou.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:339-343
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:To determine the practicable dehairing parameters for pig processing and to provide the tech-support for scalding system design, further, to reduce processing cost and improve pork meat quality and safety, the study examined the relationship of pig hairs pulling force and work with immersed time and temperature. Hairs were extracted from pig skin with instrumental tweezers. The results general trended that as the heating time and temperature increased, the peak pulling force and the total work done decreased. The results showed that if immersion temperature was greater than 65&deg;C, then there was no further reduction in peak pulling force beyond 4 minutes of treatment. When considering work done in removing hairs, we concluded that heating pig at 65&deg;C for 5 minutes was the feasible parameters to hair extraction. These results have important implication in design of scalding system.
Number of references:14
Main heading:Parameter estimation
Controlled terms:Cost reduction - Customer satisfaction - Heating - Quality control - Total quality management
Uncontrolled terms:Dehairing - Force - Heating time - Pig skin - Pork meat - Processing costs - Processing parameters - Pulling force - System design - Total work
Classification code:913.3 Quality Assurance and Control - 912.2 Management - 912 Industrial Engineering and Management - 922.2 Mathematical Statistics - 911.2 Industrial Economics - 643.1 Space Heating - 642.1 Process Heating - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2010.06.059
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 4>
Accession number:20103113111416
Title:Influence of charring conditions of biomass chars on toluene decomposition characteristics
Authors:Peng, Junxia (1); Zhao, Zengli (1); Li, Haibin (1); Wang, Xiaoling (1)
Author affiliation:(1) Key Laboratory of Renewable Energy and Gas Hydrate of Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; (2) Graduate School, Chinese Academy of Sciences, Beijing 100039, China
Corresponding author:Li, H.
      (lihb@ms.giec.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:251-256
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:Toluene conversion over packed bed of biomass char with microwave heating was determined. The effects of charring conditions, such as temperature, activation methods and precursors, on toluene decomposition characteristics were determined. The results showed that toluene conversion over biomass char was obviously influenced by charring conditions. Higher charring temperature could enlarge the surface area and pore volume of biomass chars and also enhance toluene conversion on biomass chars. Toluene conversion could reach 99.9% over biomass char which was prepared at 850&deg;C. Surface area and catalytic activity of biomass chars were increased when it was activated in CO<inf>2</inf> or steam atmosphere. Mineral contents strongly influenced the catalytic activity of biomass char. In comparison to the catalytic activity of rice husk chars with and without dash, it was revealed that the more K<inf>2</inf>O and CaO biomass chars had, the better catalytic activity they showed.
Number of references:16
Main heading:Biomass
Controlled terms:Catalyst activity - Electrochemical sensors - Packed beds - Radio waves - Toluene
Uncontrolled terms:Activation method - Biomass char - Catalytic activity - Mineral content - Pore volume - Rice husk - Surface area - Toluene conversion - Toluene decomposition
Classification code:821.5 Agricultural Wastes - 805.1.1 Biochemical Engineering - 804.1 Organic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.2 Chemical Reactions - 802.1 Chemical Plants and Equipment - 801.4.1 Electrochemistry - 801 Chemistry - 732.2 Control Instrumentation - 716.3 Radio Systems and Equipment - 711 Electromagnetic Waves - 525.1 Energy Resources and Renewable Energy Issues
DOI:10.3969/j.issn.1002-6819.2010.06.043
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 5>
Accession number:20103113111437
Title:Effects of film-forming combined with modified atmosphere packaging on qualities of Pacific white shrimp
Authors:Ling, Pinghua (1); Xie, Jing (1)
Author affiliation:(1) College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Corresponding author:Ling, P.
      (lingpinghua@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:368-374
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to inhibit melanosis of Pacific white shrimp and prolong its shelf-life, 1% chitosan was combined with a kind of mixed anti-melanosis component (M) to prevent corrosion of Pacific white shrimp under modified atmosphere packaging (MAP) of two gas mixtures, i.e., 40% CO<inf>2</inf> /30% O<inf>2</inf>/30% N<inf>2</inf> (I) and 85% CO<inf>2</inf>/5% O<inf>2</inf>/10% N<inf>2</inf> (II) with high-barrier packaging bag (K-PET/PE) at (4&plusmn;1)&deg;C. Total bacteria count (TBC), total volatile basic nitrogen(TVB-N), pH, polyphenol oxidase (PPO) activity, and sensory evaluation were determined to evaluate the effects of the different preservation methods. The mixed anti-melanosis component (M) were optimized by orthogonal experiment, the optimal combination was as follows, 0.01% 4-hexylresorcinol+1.5% citric acid+1% ascorbic acid, the Group (Chitosan+I), (Chitosan+M+I), (Chitosan+II) and (Chitosan+M+II) began to generate melanosis dramatically at 6th, 8th, 12th and 14th day, respectively; all treatment groups, compared with the control, could slow down the increase of TBC, TVB-N, PPO activity and the pH significantly during the whole storage period. The fresh-keeping effect of Group (Chitosan + M + II) was the best in all groups, extending the shelf-life of Pacific white shrimp more than two times compared with control when stored at (4&plusmn;1)&deg;C. Film-forming combined with modified atmosphere packaging is an effective preservation method for Pacific white shrimp, which has application values.
Number of references:20
Main heading:Quality control
Controlled terms:Agriculture - Chitin - Chitosan - Customer satisfaction - Food preservation - Gas permeable membranes - Group technology - Ketones - Optimization - Organic acids  - Packaging - pH effects - Total quality management
Uncontrolled terms:4-Hexylresorcinol - Agriculture products - Ascorbic acids - Barrier packaging - Basic nitrogen - Film-forming - Modified atmosphere - Modified atmosphere packaging - Optimal combination - Orthogonal experiment  - Packaging quality - Polyphenol oxidase - Sensory evaluation - Shelf life - Storage periods - Treatment group - Two-gas mixtures
Classification code:912 Industrial Engineering and Management - 912.2 Management - 913.1 Production Engineering - 913.2 Production Control - 913.3 Quality Assurance and Control - 921.5 Optimization Techniques - 922.2 Mathematical Statistics - 822.2 Food Processing Operations - 462.1 Biomedical Equipment, General - 631.1 Fluid Flow, General - 694.1 Packaging - 801.1 Chemistry, General - 802.1 Chemical Plants and Equipment - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2010.06.064
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 6>
Accession number:20103113111389
Title:Improvement and verification of cumulative function of crop water sensitive index
Authors:Han, Songjun (1); Liu, Qunchang (1); Wang, Shaoli (1); Hu, Yaqiong (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:Han, S.
      (hansj@iwhr.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:83-88
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:In order to analysis the influence of water deficit on crop production, the characteristics of the crop water sensitive index in crop-water production function model and its cumulative curve were analyzed, and widely used cumulative function of crop water sensitive index was improved. The improved cumulative function had little differences of the former one during the middle growth stage, but the differences were significant in the early and late growth stage. The improved cumulative function could be used to simulate the changes of cumulative value of crop water sensitive index during the whole growth stage continuously. The improvement was verified by crop production and evapotranspiration data from deficit irrigation experiments of winter wheat in Xiaohe of Shanxi Province and late paddy rice in Guilin of Guangxi Province. The simulated cumulative value of crop water sensitive index using the improved function accord well with the measure value, its have better simulation effect than the former function.
Number of references:14
Main heading:Crops
Controlled terms:Cultivation - Water supply
Uncontrolled terms:Crop production - Deficit irrigation - Function models - Growth stages - Guangxi - Influence of water - Paddy rice - Water deficits - Water production - Water sensitive  - Water sensitivity - Winter wheat
Classification code:446.1 Water Supply Systems - 821.3 Agricultural Methods - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.06.015
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 7>
Accession number:20103113111390
Title:Spatial variability of soil mineral nitrogen in a small catchment in the wind-water erosion crisscross zone of Loess Plateau
Authors:She, Dongli (1); Shao, Ming'an (2); Yu, Shuang'en (1)
Author affiliation:(1) Key Lab. of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling 712100, China
Corresponding author:She, D.
      (shedongli@gmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 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:Objective of this study was to understand the spatial pattern of soil nutrient properties and their relationships with environmental factors in a small catchment. Spatial pattern and variability of surface (0-10, 10-20, 20-40 cm) soil ammonium and nitrate in a small catchment were analyzed combining with classical statistical and geo-statistics with data measured by non-uniform sampling method in the wind-water erosion of the Loess Plateau. Results showed that mixed land uses patterns developed by the spatial arrangement of different land uses could trap the runoff and sediments, which ultimately formed the plaque mosaic patterns of soil mineral nitrogen on the slope. Soil ammonium and nitrate presented moderate variability, and had moderate spatial autocorrelation. The spatial variability could be controlled by intrinsic variations in soil characteristics (texture, mineralogy, soil genesis processes and terrain) and extrinsic variations (soil fertilization and cultivation practices). The study built the spatial multiple regression-prediction models of soil mineral nitrogen under different soil layers. There were different variables entered to these models, which meant that at different soil depths, there were different environmental factors controlled the spatial variability of soil ammonium and nitrate. The results suggested that creating a mosaic pattern by land use arrangement and more nutrient matter input would improve the soil quality effectively on the hilly area of the Plateau.
Number of references:12
Main heading:Geologic models
Controlled terms:Ammonium compounds - Catchments - Crystallography - Forecasting - Forestry - Land use - Mathematical models - Mineralogy - Minerals - Nitrogen  - Nutrients - Regression analysis - Runoff - Sampling - Silicate minerals - Soil surveys - Soils - Spatial variables measurement
Uncontrolled terms:Environmental factors - Geostatistics - Hilly areas - Loess Plateau - Mosaic patterns - Multiple regressions - Nonuniform sampling - Prediction model - Regression-prediction models - Small catchment  - Soil characteristics - Soil depth - Soil fertilization - Soil genesis - Soil layer - Soil mineral nitrogen - Soil nutrients - Soil quality - Spatial arrangements - Spatial autocorrelations  - Spatial patterns - Spatial variability - Water erosion
Classification code:943.2 Mechanical Variables Measurements - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821.0 Woodlands and Forestry - 821.2 Agricultural Chemicals - 822.3 Food Products - 912.2 Management - 913.3 Quality Assurance and Control - 921 Mathematics - 922.1 Probability Theory - 922.2 Mathematical Statistics - 933.1 Crystalline Solids - 801 Chemistry - 403 Urban and Regional Planning and Development - 406.2 Roads and Streets - 442.1 Flood Control - 442.2 Land Reclamation - 444 Water Resources - 483.1 Soils and Soil Mechanics - 444.1 Surface Water - 461.9 Biology - 481.1 Geology - 482 Mineralogy - 482.2 Minerals - 454.3 Ecology and Ecosystems
DOI:10.3969/j.issn.1002-6819.2010.06.016
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 8>
Accession number:20103113111397
Title:Fuzzy optimization of mechanical outline design scheme based on improved grey connection analysis
Authors:Lou, Xiyin (1)
Author affiliation:(1) Department of Mechanical and Electrical Engineering, Huzhou Vocational Technology College, Huzhou 313000, China; (2) State Key Laboratory of CAD and CG, Zhejiang University, Hangzhou 310027, China
Corresponding author:Lou, X.
      (louxiyin@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:135-140
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Aiming at the fuzzy and correlation among technical evaluation indexes in the mechanical system design scheme, the paper studied the decision-making problem of mechanical system design scheme. Based on the preferred subjection degree and grey incidence, the method of improving grey incidence fuzzy decision-making was proposed. It aimed to seek the optimal design scheme of complex systems from the whole perspectives. Original datas were non-dimensionalized and normalized by using fuzzy math subjection function theory. The technical index weight set and grey incidence coefficient matrix were built to avoid the information loss of technical indexes in the evaluation process. The fuzzy optimization of mechanical products overall design scheme was implemented through a comprehensive evaluation model. Finally, YF27-315 type thin plate hydraulic press punching was taken as an example. The verified model can effectively reduce subjective disturbance in the evaluation process and make the decision of mechanical products design scheme more comprehensive and objective.
Number of references:21
Main heading:Machine design
Controlled terms:Decision making - Functions - Hydraulic machinery - Mechanical engineering - Mechanics - Optimization - Product design
Uncontrolled terms:Coefficient matrix - Complex systems - Comprehensive evaluation model - Decision-making problem - Design scheme - Evaluation process - Function theory - Fuzzy decision-making - Fuzzy math - Fuzzy optimization  - Grey connection analysis - Grey incidence - Grey incidence degree - Hydraulic press - Information cluster grey incidence degrees - Information loss - Mechanical product - Mechanical systems - Optimal design - Overall design  - Subjection degree - Technical evaluation - Technical index - Thin plate
Classification code:921.5 Optimization Techniques - 921 Mathematics - 913.1 Production Engineering - 931.1 Mechanics - 912.2 Management - 608 Mechanical Engineering, General - 601 Mechanical Design - 632.2 Hydraulic Equipment and Machinery
DOI:10.3969/j.issn.1002-6819.2010.06.024
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 9>
Accession number:20103113111379
Title:Effects of irrigation methods on soil environment and rice yield in paddy ecosystems
Authors:Yin, Chunmei (1); Xie, Xiaoli (1)
Author affiliation:(1) Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; (2) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; (3) National Observation Station of Taoyuan Agro-ecology System, Taoyuan 415700, China
Corresponding author:Yin, C.
      (cmyin@isa.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:26-31
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:On the basis of the long-term field experiments in Taoyuan Experimental Station of Agriculture Ecosystem-CERN, Hunan Province, effects of irrigation methods on the soil physic and chemical properties and productivity of paddy were simulated and analyzed. The four treatments included rain-fed paddy field (RI), basin irrigation (BI), normal irrigation (NI), controlled moist irrigation (CI). The results showed that in the red soil region of south China, BI led a low soil bulk density and a high water storage capacity, which were favorable for the accumulation of soil organic matter (SOC) and nitrogen (N). SOC in surface layer (0-20 cm) of BI was higher than RI and CI by 7.0% and 6.1%, respectively, and soil N was 10.8% and 8.8%. The experiment also showed that, the soil surface temperature of RI was 0.3-0.5&deg;C higher than CI during days of rice growing. Because of the rich rainfall resources in this area, the differences yield of the early rice among treatments could be attributed to the changes of soil nutrients induced by different irrigation methods. And water became the limited factor for the high yield of late rice. Among the four irrigation methods, BI might be the best model for obtaining high rice yield.
Number of references:17
Main heading:Soil testing
Controlled terms:Chemical properties - Ecosystems - Grain (agricultural product) - Irrigation - Rain - Soil mechanics - Soils
Uncontrolled terms:Agriculture ecosystems - Best model - Experimental stations - High water - High yield - Hunan province - Irrigation methods - Paddy fields - Red soils - Rice yield  - Soil bulk density - Soil environment - Soil nutrients - Soil organic matters - Soil physics - Soil surface temperatures - South China - Surface layers - Term field
Classification code:821.4 Agricultural Products - 821.3 Agricultural Methods - 801 Chemistry - 483.1 Soils and Soil Mechanics - 454.3 Ecology and Ecosystems - 443.3 Precipitation - 423 Non Mechanical Properties and Tests of Building Materials
DOI:10.3969/j.issn.1002-6819.2010.06.005
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 10>
Accession number:20103113111388
Title:Characteristics of soluble chemical loss in soil
Authors:Tong, Juxiu (1); Yang, Jinzhong (1); Bao, Ruchao (1)
Author affiliation:(1) The State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
Corresponding author:Tong, J.
      (juxiu.tong@gmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:77-82
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:Characteristics of chemical loss in loam and sand containing a certain initial chemical were investigated experimentally through soil testing in laboratory. The process of ponding water on soil surface before runoff was considered. It was found that with both surface runoff and subsurface drainage, only a small part of the lost chemical of soil was in the surface runoff water while most lost chemical of soil was in the subsurface drainage water at the same situations. So about reducing subsurface drainage to enhance the utilization of the chemical of soil should be considered at first if methods was not adopted that reduce surface runoff water and subsurface drainage water at the same time. And within the intensity of rainstorm, the greater rainfall intensity, the less initial water content of soil, the better condition of subsurface drainage and the coarser sandy soil, the more chemical mass loss to surface runoff and subsurface drainage water, which reduces chemical efficiency of soil. The results will provide significant references for the improvement of the utilization of the chemical of soil and the reduction of agricultural pollution.
Number of references:15
Main heading:Soil testing
Controlled terms:Drainage - Groundwater flow - Natural water geochemistry - Runoff - Soils - Storms - Wastewater disposal - Water content
Uncontrolled terms:Agricultural pollution - Chemical efficiency - Chemical loss - Chemical mass - Loam and sand - Rainfall intensity - Rainstorm intensity - Sandy soils - Soil drainage - Soil surfaces  - Subsurface drainages - Surface runoffs
Classification code:631.1 Fluid Flow, General - 444.2 Groundwater - 452.4 Industrial Wastes Treatment and Disposal - 454.2 Environmental Impact and Protection - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 502 Mines and Quarry Equipment and Operations - 444.1 Surface Water - 443.3 Precipitation - 442.1 Flood Control - 442 Flood Control; Land Reclamation - 406 Highway Engineering - 401 Bridges and Tunnels - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.06.014
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 11>
Accession number:20103113111402
Title:Physical and mechanical properties of ridging radishes in Northern China
Authors:Chen, Haitao (1); Ren, Keke (1); Yu, Jia (1)
Author affiliation:(1) Engineering College, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Chen, H.
      (haitao1963@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:6
Issue date:June 2010
Publication year:2010
Pages:163-169
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on the field and lab measurement on the ridging green and red radishes in harvest time in north China, the physical and mechanical properties of radishes, such as geometric characteristics, the optimum parameters combination of the loosening location, and pulling force, were explored. The mathematic statistics method was employed to analyze the main geometric properties. The variation range and distribution frequencies of main geometric properties indexes of the green and red radishes were found out. The tensile test was carried out to measure its mechanical properties, such as cohesive strength between stem and root of radishes, pull force in harvest, and the data were analyzed by means of software of the Design-Expert Version 6.0.10. The experimental results indicated that the cohesive strength between the stem and the root of the green radish and the red radish were in the range of (2.45&plusmn;1.23)105 Pa and (2.17&plusmn;1.08)105 Pa, and the minimum anti-pull force was 90 N and 110 N, the maximum pull force for the green and red radishes in condition of natural growth in harvest were in the range of (191&plusmn;113.8)N and (197&plusmn;107.2)N, respectively. Optimum parameters combination of the loosening location were that the depth was from 15 to 26 cm, and the distance was from 10 to 20 cm, using pull method to harvest the green radish, and that the depth was from 18 to 24 cm, and the distance was from 12 to 16 cm, using pull method to harvest the red radish. The study provides theoretical data for designing radishes harvester.
Number of references:15
Main heading:Mechanical properties
Controlled terms:Geometry - Harvesters - Harvesting - Machinery - Optimization - Physical properties - Structures (built objects) - Tensile strength - Tensile testing
Uncontrolled terms:Cohesive strength - Design-expert - Geometric characteristics - Geometric properties - Harvest time - Mathematic statistics - North China - Northern China - Optimum parameters - Parameter optimization  - Physical and mechanical properties - Pull force - Pulling force - Pulling radish harvester - Tensile tests
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 921.5 Optimization Techniques - 921 Mathematics - 821.3 Agricultural Methods - 951 Materials Science - 821.1 Agricultural Machinery and Equipment - 422.2 Test Methods - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 408 Structural Design - 601 Mechanical Design
DOI:10.3969/j.issn.1002-6819.2010.06.029
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 12>
Accession number:20103113111378
Title:Error analysis of multi-needle heat pulse probe for soil thermal conductivity measurement
Authors:Lu, Sen (1); Ren, Tusheng (1); Yang, Yang (1); Sun, Shiyou (2); Ju, Zhaoqiang (3)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (2) Institute of Agro-resources and Environment, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, China; (3) Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China
Corresponding author:Ren, T.
      (tsren@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:6
Issue date:June 2010
Publication year:2010
Pages:20-25
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Thermal conductivity is an essential parameter for studying coupled transport of heat and water in soil. In order to determine the error of multi-needle heat pulse technique, measurement accuracy of a multi-needle heat pulse probe was tested by comparing its data with that from the single probe method in this paper. Thermal conductivity measurements were conducted on four soils of different textures under various bulk densities, water contents, and air pressures. The results indicated that generally the thermal conductivity from the multi-needle heat pulse method agreed well with that from the single probe method, and the method was able to provide accurate soil thermal conductivity data. The mean error of the multi-needle heat pulse probe thermal conductivity was 0.074 W/(m&middotK). Due to the mean free path of gas decreased, the thermal conductivity of dry soil showed a logarithmic increasing with the increasing of air pressure. The errors of the multi-needle heat pulse probe mainly appeared at the medium water contents, where larger temperature rise near the heater enhanced latent heat transfer of vapor. The contact resistance between the needle and sample, change of soil bulk density near the needles, and liquid water transfer under temperature gradient may also have contributed to the errors in the muti-needle probe method. This study will provide a method for estimating soil thermal conductivity in the soil and water engineering.
Number of references:26
Main heading:Thermal conductivity of gases
Controlled terms:Atmospheric pressure - Electric conductivity measurement - Error analysis - Heat exchangers - Heat transfer - Needles - Probes - Soil surveys - Soils - Thermal conductivity  - Thermoanalysis - Water vapor
Uncontrolled terms:Air pressures - Bulk density - Coupled transport - Dry soil - Heat pulse - Heat pulse method - ITS data - Liquid water transfer - Mean errors - Mean free path  - Measurement accuracy - Needle probes - Single probe - Soil and water - Soil bulk density - Soil thermal conductivity - Temperature gradient - Temperature rise - Thermal conductivity measurements
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 801.4 Physical Chemistry - 819.6 Textile Mills, Machinery and Equipment - 921.6 Numerical Methods - 931.2 Physical Properties of Gases, Liquids and Solids - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 942.2 Electric Variables Measurements - 943 Mechanical and Miscellaneous Measuring Instruments - 801 Chemistry - 406.2 Roads and Streets - 443.1 Atmospheric Properties - 462.1 Biomedical Equipment, General - 641.2 Heat Transfer - 483.1 Soils and Soil Mechanics - 641 Heat and Mass Transfer; Thermodynamics - 641.1 Thermodynamics - 616.1 Heat Exchange Equipment and Components
DOI:10.3969/j.issn.1002-6819.2010.06.004
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 13>
Accession number:20103113111405
Title:Design of acoustic signal acquisition system of stored grain pests based on wireless sensor networks
Authors:Han, Antai (1); He, Yong (1); Li, Jianfeng (2); Chen, Zhiqiang (2); Sun, Yanwei (2)
Author affiliation:(1) College of Biosystem Engineering and Food Science, Zhejiang University, Hangzhou 310029, China; (2) Institute of Electrical Engineering and Electronic Technology, China Jiliang University, Hangzhou 310018, China
Corresponding author:Han, A.
      (antai.han@gmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:181-187
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:In order to solve the problems of existing acoustic signal acquisition system of stored grain pests, which were weak at expansibility, intelligent level, price performance ratio, flexibility and data transmission ability, and the limitations was analyzed. Based on the above analysis, the new type acoustic signal acquisition system of stored grain pests was designed by using the wireless sensor network and compressed sensing techniques, then the architecture, hardware and software design approach of the proposed system were presented in detail. The proposed system was applied in sampling the crawl acoustic signal of tribolium castaneum herbst adults in grain barrel. The experimental results showed that the design scheme of the proposed system was rational, and the remote, real-time and reliable wireless transmission for the raw measurements of acoustic signal from 20 data acquisition nodes was implemented with the sampling frequency at 10 KHz through use of compressed sensing technology. This research contribute to the exploration on the application of wireless sensor networks in the prevention and control of stored grain pests.
Number of references:19
Main heading:Wireless sensor networks
Controlled terms:Acoustic signal processing - Acoustic waves - Design - Sensor networks - Signal analysis - Signal processing - Signal reconstruction - Software design - Technology transfer
Uncontrolled terms:Acoustic signals - Compressed sensing - Data transmission - Design approaches - Design scheme - Hardware and software - Intelligent level - Price-performance ratios - Raw measurements - Sampling frequencies  - Stored-grain pests - Wireless transmissions
Classification code:911.2 Industrial Economics - 731.1 Control Systems - 732 Control Devices - 751 Acoustics, Noise. Sound - 751.1 Acoustic Waves - 901.4 Impact of Technology on Society - 902.1 Engineering Graphics - 723.5 Computer Applications - 722.4 Digital Computers and Systems - 722.3 Data Communication, Equipment and Techniques - 716.3 Radio Systems and Equipment - 716.1 Information Theory and Signal Processing - 408 Structural Design - 723.1 Computer Programming
DOI:10.3969/j.issn.1002-6819.2010.06.032
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 14>
Accession number:20103113111392
Title:Analysis of energy consumption and energy conservation of multi-effect condensed refrigeration unit in small cold storage
Authors:Liu, Xiaohui (1); Lu, Mosen (2); Wang, Shuzhen (2); Xin, Li (2); Zhang, Qian (2); Lu, Rong (3)
Author affiliation:(1) School of Agriculture and Food Engineering, Shandong University of Technology, Zibo 255049, China; (2) Shandong Institute of Pomology, Tai'an 271000, China; (3) Yi Xin Preservation Equipment Factory, Tai'an 271000, China
Corresponding author:Lu, M.
      (lumosen@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:103-108
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Air-cooled unit is mainly used in small and medium-sized refrigeration storage currently, which still has many problems with higher consumption of energy, inefficiency, longer starting time and failure shutdown due to high compressor exhaust pressure. Multi-effect condensed refrigeration unit combining air-cooled, water-cooled and transpiration-cooled in one was designed. A ten-ton fresh-preserved storehouse whose temperature range was 0-3&deg;C was used as experimental subject. Energy efficiency experiments, safety and efficiency experimental researches were conducted with multi-effect condensed refrigeration unit by using thermocouples, data acquisition system, three-phase electricity parameters monitor, computer processing system etc, which the ambient temperature was kept at 36&deg;C or so. The experimental results showed that per cooling time of multi-effect condensed refrigeration unit was only 0.38 h. Electricity consumption saving of the multi-effect condensed refrigeration unit reached over 46%, 28.79&deg;C compressor discharge temperature dropped, and 0.9 MPa exhaust pressure of compressor reduced than air-cooled unit. It had lower condensing temperature and uniform temperature field for fins-and-tubes heat exchanger of multi-effect condensed refrigeration unit. Therefore, multi-effect condensed refrigeration unit has remarkable energy efficiency effect in small cold storage and belongs to energy efficiency, high efficiency and safety refrigerating machine set.
Number of references:19
Main heading:Energy efficiency
Controlled terms:Capillary tubes - Cold storage - Compressors - Cooling systems - Pressure effects - Refrigerating machinery - Refrigeration - Refrigerators - Temperature - Thermocouples  - Thermometers
Uncontrolled terms:Ambient temperatures - Computer processing - Condensing temperature - Consumption of energy - Cooling time - Data acquisition system - Discharge temperature - Electricity-consumption - Energy consumption - Exhaust pressure  - Experimental research - High efficiency - Multi-effect - Refrigerating machines - Temperature field - Temperature range - Uniform temperature field
Classification code:931.1 Mechanics - 694.4 Storage - 644.4 Cryogenics - 644.3 Refrigeration Equipment and Components - 644.1 Refrigeration Methods - 944.5 Temperature Measuring Instruments - 641.2 Heat Transfer - 619.1 Pipe, Piping and Pipelines - 618.1 Compressors - 616.1 Heat Exchange Equipment and Components - 525.2 Energy Conservation - 641.1 Thermodynamics
DOI:10.3969/j.issn.1002-6819.2010.06.018
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 15>
Accession number:20103113111380
Title:Influence of line source length of vertical line source irrigation on wetted soil change characteristics
Authors:Cheng, Huijuan (1); Wang, Quanjiu (1); Bai, Yungang (3); Cai, Junshe (4); Zeng, Chen (2)
Author affiliation:(1) Institute of Water Resources, Xi'an University Technology, Xi'an 710048, China; (2) State Key Laboratory of Soil Erosion and Dry land Farming on the Loess Plateau, Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling 712100, China; (3) Xinjiang Research Institute of Water Resources and Hydropower, Urumqi 830049, China; (4) Xinjiang Grapes and Melons Research and Development Centre, Shanshan 838201, 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:6
Issue date:June 2010
Publication year:2010
Pages:32-37
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Vertical line source irrigation system can transport water to the root of fruit trees directly for increasing water use efficiency by reducing soil surface evaporation. A simulated experiment was performed to study the effects of line source length on wetted soil characteristics. Results showed that there were linear relationships between the square-root of infiltration time and the surface horizontal wetted radius, maximum horizontal wetted radius and vertical wetted depth of different line source length. The line source length had an unsignificant effect on the surface horizontal wetted radius and maximum horizontal wetted radius of soil. It also showed that there was a linear relationship between the square-root of infiltration time and the ratio of the surface horizontal wetted radius to maximum horizontal wetted radius of soil. The ratio of the surface horizontal wetted radius to the vertical wetted depth of soil increased trends with infiltration time but exhibited decreasing tendency with the line source length increasing. These results can provide references for determining vertical line source irrigation technology parameters.
Number of references:19
Main heading:Wetting
Controlled terms:Irrigation - Moisture determination - Orchards - Seepage - Soil mechanics - Soil moisture - Water supply
Uncontrolled terms:Line sources - Vertical line source - Vertical line source irrigation - Wetted soil
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 821.3 Agricultural Methods - 802.3 Chemical Operations - 944.2 Moisture Measurements - 483.1 Soils and Soil Mechanics - 441 Dams and Reservoirs; Hydro Development - 407 Maritime and Port Structures; Rivers and Other Waterways - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2010.06.006
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 16>
Accession number:20103113111386
Title:Effects of medium characteristics on finger flow during soil water redistribution
Authors:Li, Heli (1); Li, Huaien (1)
Author affiliation:(1) Key Laboratory of Water Resources, Environmental and Ecology in Northwest China, Xi'an University of Technology, Xi'an 710048, China; (2) Institute of Geographical Sciences and Natural Resources, Chinese Academy of Sciences, Beijing 100101, China; (3) Graduate School, Chinese Academy of Sciences, Beijing 100039, China
Corresponding author:Li, H.
      (lhuaien@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:6
Issue date:June 2010
Publication year:2010
Pages:65-70
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Research on finger flow has practical guiding significance to effective utilization of agricultural water and fertilizer resources and to protection of environment and water against pollution. In order to understand the effects of medium characteristics on finger flow during the redistribution following the infiltration process of soil water, in this paper, an experimental study was carried out to discuss the effects of the characteristics of soil medium on the development of finger flow during redistribution with two different grain sized sands. The medium characteristics considered in this work were soil texture, soil structure and soil initial water content. Three soil structures, i.e. homogeneous soil, texture-layered soil and humidity-layered soil, were designed in this study. The experimental results showed that finger flow could easily occur in dryer and coarser homogeneous soil during water redistribution since both wetter and finer soil medium were proved to have disadvantageous effect on development of finger flow. The moving speed of wetting front was determined by both development status of finger flow and soil initial moisture content. Moreover, finger flow was greatly advanced in texture-layered soil with coarser soil overlaid by a finer soil layer compared with that in homogeneous dry coarser soil during water redistribution though it needed more time to develop, while the development of finger flow was restrained in humidity-layered soil with a wetter soil layer overlaid by a dryer soil layer. It was suggested that soil characteristics such as texture, structure and initial water content would have important effects on formation and propagation of finger flow during water redistribution.
Number of references:17
Main heading:Water content
Controlled terms:Dryers (equipment) - Flow of water - Permittivity - Seepage - Soil mechanics - Soil moisture - Textures - Underwater soils - Water resources
Uncontrolled terms:Agricultural water - Experimental studies - Finger flow - Homogeneous soil - Infiltration process - Initial Moisture Content - Layered soils - Moving speed - Soil characteristics - Soil layer  - Soil medium - Soil structure - Soil textures - Soil water - Water redistribution - Wetting fronts
Classification code:933 Solid State Physics - 802.1 Chemical Plants and Equipment - 708.1 Dielectric Materials - 701 Electricity and Magnetism - 642.2 Industrial Furnaces and Components - 631.1.1 Liquid Dynamics - 483.1 Soils and Soil Mechanics - 471.1 Oceanography, General - 444 Water Resources - 441 Dams and Reservoirs; Hydro Development - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2010.06.012
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 17>
Accession number:20103113111422
Title:Economic analysis for production of fuel ethanol with corn straw
Authors:Song, Andong (1); Ren, Tianbao (2); Zhang, Bailiang (2)
Author affiliation:(1) College of Life Science, Henan Agricultural University, Zhengzhou 450002, China; (2) Key Laboratory of Renewable Energy of Ministry of Agriculture, Henan Agricultural University, Zhengzhou 450002, China
Corresponding author:Zhang, B.
      (hauzblo@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:283-286
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:In order to analyze the current economics of cellulosic ethanol from corn straw, this study was based on the case of corn straw cellulosic ethanol demonstration plant with scale of 300 t/a. An analysis on technical parameters of processes and the production cost was performed. The results showed that corn straw saccharification rate, ethanol concentration and ethanol production rate were 51.6%, 23 g/L and 18.1%, respectively. In addition, the results of economic indicators indicated that cost of production, energy consumption, water consumption were approximately 7385&yen;/t, 3.26&times;10⁷ kJ/t and 12.8 t/t, respectively; the cellulase cost is one of the key factors on the cost of cellulosic ethanol production. With the development of key technology of cellulosic ethanol and its technical engineering, the cost of corn straw cellulosic ethanol will further reduce, and exhibit enormous potential and application prospects.
Number of references:17
Main heading:Cellulosic ethanol
Controlled terms:Cost benefit analysis - Cost reduction - Economic analysis - Ethanol - Saccharification - Water supply
Uncontrolled terms:Application prospect - Corn straws - Cost of productions - Demonstration plants - Economic indicators - Energy consumption - Ethanol concentrations - Ethanol production - Fuel ethanol - Key factors  - Key technologies - Production cost - Technical engineering - Water consumption
Classification code:912.2 Management - 911.2 Industrial Economics - 911 Cost and Value Engineering; Industrial Economics - 811.3 Cellulose, Lignin and Derivatives - 804.1 Organic Compounds - 802.2 Chemical Reactions - 801.2 Biochemistry - 523 Liquid Fuels - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2010.06.049
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 18>
Accession number:20103113111429
Title:Entropy-based of set pair analysis model for optimization of land consolidation plans
Authors:Wang, Mingwu (1); Chen, Guangyi (1); Jin, Juliang (1)
Author affiliation:(1) School of Civil Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author:Wang, M.
      (geotechnics@foxmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:322-325
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:Optimization of land consolidation plan is a complex uncertainty problem. To overcome the shortcoming of the conventional methods by means of the experiences or preferences of the experts used to evaluate the land consolidation, a novel comprehensive evaluation model using set pair analysis theory and information entropy theory is described in this paper. A concept of identical degree of set pair was introduced to calculate the approaching degree between the evaluated selection plan and the best optimal scheme. Then combined entropy weights of evaluation indexes, which behaved the influences of internal information of evaluation indexes on the decision-making, the best consolidation scheme would be selected according to the maximum subordination principle. Moreover, the evaluation results and comparison with the method using catastrophe theory from a practical example show that the proposed method used to evaluate the land consolidation plans is feasible and can improve the reliability of decision-making, and the result is fairly good.
Number of references:16
Main heading:Decision theory
Controlled terms:Decision making - Entropy - Land use - Optimization - Reliability theory
Uncontrolled terms:Catastrophe theory - Comprehensive evaluation model - Consolidation plan - Conventional methods - Entropy weights - Evaluation index - Evaluation results - Identical degree - Information entropy - Land-use optimization  - Optimal scheme - Set pair analysis - Uncertainty problems
Classification code:922.2 Mathematical Statistics - 921.5 Optimization Techniques - 921 Mathematics - 961 Systems Science - 912.2 Management - 442.2 Land Reclamation - 403 Urban and Regional Planning and Development - 641.1 Thermodynamics
DOI:10.3969/j.issn.1002-6819.2010.06.056
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 19>
Accession number:20103113111439
Title:Microwave-vacuum drying characteristics and process optimization of Agaricus bisporus slices
Authors:Li, Bo (1); Lu, Fei (1); Liu, Benguo (1); Nan, Haijuan (1)
Author affiliation:(1) School of Food Science, Henan Institute of Science and Technology, Xinxiang 453003, China
Corresponding author:Li, B.
      (libowuxi@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:6
Issue date:June 2010
Publication year:2010
Pages:380-384
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Microwave-vacuum drying (MVD) was used to dry Agaricus bisporus slices, and its drying characteristics were studied. MVD was compared with hot air drying, vacuum drying and freeze-drying. The results showed that the effect of microwave power on drying rate was greater than that of vacuum degree during MVD process for Agaricus bisporus slices. The optimum drying parameters were microwave power intensity 17.4 W/g, vacuum 70 kPa and drying time 20 minutes, and moisture content of product was 6.9% under this condition. Comparing drying time, rehydration, color and vitamin C content, the qualities of slices dried by MVD was quite close to freeze-drying and obviously better than hot air drying and vacuum drying. Furthermore, MVD was much faster than freeze-drying. Therefore, MVD is a potential technology for drying Agaricus bisporus slices.
Number of references:15
Main heading:Curing
Controlled terms:Food technology - Fungi - Low temperature drying - Microwave generation - Microwave heating - Microwave power transmission - Optimization - Vacuum - Vacuum technology
Uncontrolled terms:Agaricus bisporus - Drying characteristic - Drying characteristics - Drying parameters - Drying rates - Drying time - Hot air drying - Microwave power - Microwave-vacuum drying - Moisture contents  - Potential technologies - Process optimization - Vacuum degree - Vacuum drying - Vitamin C
Classification code:801.2 Biochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 815.1 Polymeric Materials - 818.3 Rubber and Elastomer Processing - 822 Food Technology - 921.5 Optimization Techniques - 714.2 Semiconductor Devices and Integrated Circuits - 461.9 Biology - 633 Vacuum Technology - 642.1 Process Heating - 706.1.1 Electric Power Transmission - 711.1 Electromagnetic Waves in Different Media - 713.2 Oscillators - 714.1 Electron Tubes
DOI:10.3969/j.issn.1002-6819.2010.06.066
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 20>
Accession number:20103113111381
Title:Calculation method of field water use efficiency of rice based on the theory of deficit irrigation
Authors:Jia, Hongwei (1); Lu, Cheng (1)
Author affiliation:(1) Zhejiang Institute of Hydraulics and Estuary, Hangzhou 310020, China
Corresponding author:Jia, H.
      (jia_hongwei@tom.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:38-41
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 valid irrigation water amount, calculated by traditional method of field water use efficiency (FWUE) based on the theory of sufficient irrigation, can not reflect the water transfer and utilization in field as it includes invalid water. In this paper, the validity of evapotranspiration was analyzed according to the crop-water production function, and a new calculation method of FWUE was built based on the theory of deficit irrigation. Calculated by the new method, the FWUE of rice was 0.768 in flooding-irrigation mode, and 0.915 in Wet Irrigation mode. The result indicate a more accurate picture of water transfer and utilization in field.
Number of references:13
Main heading:Irrigation
Controlled terms:Biochemical oxygen demand - Crops - Evapotranspiration - Water management - Water supply
Uncontrolled terms:Calculation methods - Deficit irrigation - In-field - Irrigation waters - Water production - Water transfers - Water use efficiency
Classification code:821.3 Agricultural Methods - 802.3 Chemical Operations - 453 Water Pollution - 452.4 Industrial Wastes Treatment and Disposal - 821.4 Agricultural Products - 452.2 Sewage Treatment - 446 Waterworks - 444.1 Surface Water - 444 Water Resources - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2010.06.007
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 21>
Accession number:20103113111417
Title:Preparation and combustion properties of inflammable carbon from poplar carbon
Authors:Zhou, Jianbin (1); Duan, Hongyan (1); Li, Sisi (1); Liu, Yingqiang (1)
Author affiliation:(1) College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
Corresponding author:Zhou, J.
      (zhoujianbin@njfu.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:257-261
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 inflammable carbon was prepared from poplar carbon which is carbonized from poplar chip, adhesive and ignition agent. Influences of adhesives, the ration of adhesive/carbon, type and content of ignition agent molding pressure and molding time were investigated. The optimum conditions were the adhesives A/poplar carbon ration of 0.6, potassium nitrate ration 5%, molding pressure 25 MPa, molding time 2 minute. The inflammable carbon was non-toxicity, smokeless, flavorless and quickly burning in 5 s, and have 8.60 N/mm2 of factor of against crushing, 6.33% of remains content, 11.20 min/g of combustion last time and 35 762.76 J/g of heat release. This study can provide basis for forming adhesive in development of powder fuels.
Number of references:15
Main heading:Waste incineration
Controlled terms:Adhesives - Molding - Potassium
Uncontrolled terms:Combustion property - Heat release - Inflammable carbon - Molding pressure - Molding time - Non-toxicity - Optimum conditions - Poplar carbon - Potassium nitrate
Classification code:818.5 Rubber Products - 818.3 Rubber and Elastomer Processing - 817.1 Polymer Products - 816.1 Processing of Plastics and Other Polymers - 804.2 Inorganic Compounds - 804.1 Organic Compounds - 549.1 Alkali Metals - 535.2 Metal Forming - 452.4 Industrial Wastes Treatment and Disposal
DOI:10.3969/j.issn.1002-6819.2010.06.044
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 22>
Accession number:20103113111391
Title:Discussion on uncertainty evaluation method for variation coefficient of drippers discharge in measurement
Authors:Zhao, Hua (1); Xu, Di (1)
Author affiliation:(1) China Institute of Water Resources and Hydropower Research, Beijing 100048, China; (2) National Center for Quality Supervision and Test of Agricultural Irrigation and Drainage Equipment, Beijing 100048, China
Corresponding author:Zhao, H.
      (zhaohua@iwhr.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:97-102
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to give the scope of error and enhance the reliability of test data, it is necessary to the uncertainty for coefficient of variation of drippers discharge. The comparison analysis for coefficient of variation of drippers discharge uncertainty evaluation method is supported by test data, so the effect and adaptability of two A-type uncertainty evaluation methods which based on series of test data were discussed. The conclusion was that the proportion of A-type standard uncertainty was more than B-type standard uncertainty which doesn't based on series of test data among the compound standard uncertainty, and the expanded uncertainty of maximum entropy was higher 4% than normal method in 95% probability for A-type evaluation, and the density distributing function of maximum entropy method matched the test data preferably, and also eccentricity coefficient of maximum entropy method was adaptability, but the quantity of test date of maximum entropy method was over 1 times than normal method. The maximum entropy method, which can improve the accurate of uncertainty evaluation.
Number of references:15
Main heading:Uncertainty analysis
Controlled terms:Entropy - Standards - Test facilities - Testing
Uncontrolled terms:Coefficient of variation - Comparison analysis - Discharge - Distributing function - Maximum entropy - Maximum entropy methods - Standard uncertainty - Test data - Uncertainty evaluation - Variation coefficient
Classification code:902.2 Codes and Standards - 641.1 Thermodynamics - 423.2 Test Methods - 922.1 Probability Theory - 423.1 Test Equipment - 422.1 Test Equipment - 402.1 Industrial and Agricultural Buildings - 422.2 Test Methods
DOI:10.3969/j.issn.1002-6819.2010.06.017
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 23>
Accession number:20103113111408
Title:Maize seeds varieties identification based on multi-object feature extraction and optimized neural network
Authors:Wang, Yuliang (1); Liu, Xianxi (2); Su, Qingtang (3); Wang, Zhaona (2)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; (2) Mechanical and Electrical Engineering College, Shandong Agricultural University, Tai'an 271018, China; (3) Department of Modern Education Technology and Teaching, Lu Dong University, Yantai 264025, China
Corresponding author:Liu, X.
      (bullish@sdau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:199-204
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to apply machine vision technology replacing human vision to identify maize seed varieties in a real-time, objective, accurate and non-invasive procedure, the hardware and software systems to identify the seeds of maize need to be developed. For maize seed and characteristics of the seed images, the identification technology of maize seed varieties and algorithms has studied and explored in depth. A multi-object features extraction and the optimized neural network using PCA identification method adapting to maize seeds varieties identification was proposed. Geometric features and color features parameters of maize seeds were extracted. Maize seeds image processing strategies and varieties identification algorithms, which was based on the machine vision, was optimized. The precision and speed of maize seeds varieties identification was improved. Through maize seeds varieties identification test on four species including Nongda 108, Ludan 981, Zhengdan 958 and Wuyue 18, average identification time-consuming of each seed was 0.127 s, and integrated identification accuracy was more than 97%. Research shows that identification and detection of maize seeds varieties based on machine vision is feasible, and this method can improve the efficiency and correct identification rate of maize seed varieties.
Number of references:15
Main heading:Seed
Controlled terms:Algorithms - Computer vision - Feature extraction - Neural networks - Optimization - Principal component analysis - Real time systems
Uncontrolled terms:Color features - Features extraction - Geometric feature - Hardware and software - Human vision - Identification algorithms - Identification method - Identification rates - Identification technology - Integrated identification  - Machine vision - Machine vision technologies - Maize seeds - Multiobject - Non-invasive - On-machines - Variety identification
Classification code:922.2 Mathematical Statistics - 741.1 Light/Optics - 741.2 Vision - 751.1 Acoustic Waves - 821.4 Agricultural Products - 921 Mathematics - 921.5 Optimization Techniques - 731.6 Robot Applications - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 722.4 Digital Computers and Systems - 716 Telecommunication; Radar, Radio and Television - 461.1 Biomedical Engineering - 723.5 Computer Applications
DOI:10.3969/j.issn.1002-6819.2010.06.035
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 24>
Accession number:20103113111403
Title:Influence of acoustic frequency technology on cotton production
Authors:Hou, Tianzhen (1); Li, Baoming (1); Wang, Mingliang (2); Huang, Weibing (3); Teng, Guanghui (1); Zhou, Qing (1); Li, Yufeng (1)
Author affiliation:(1) Key Lab. of the Ministry of Agriculture for Agricultural Engineering in Structure and Environment, College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) Office of Technologies Market of the Xinjiang Production and Construction Corps, Urumqi 830002, China; (3) Regimental Farm 101, Agricultural Division 6 of the Xinjiang Production and Construction Corps, Wujiaqu 831300, China
Corresponding author:Li, B.
      (libm@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:6
Issue date:June 2010
Publication year:2010
Pages:170-174
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Understanding the effects of acoustic frequency technology (AFT) on the growth of cotton would be helpful to cotton production in Xinjiang Uygur Autonomous Region. An experiment including two different treatments was set in order to investigate the effects of AFT on the growth of cotton. One treatment was to impose the plants with sound wave in special frequencies, the other was control. The results showed that compared to the control sites, by using AFT, the treated plant height of cotton, the width of the fourth expanded leaf from terminal one, boll-bearing branches, number of bolls and single boll weight were increased by 1.71%, 5.25%, 1.14%, 9.22% and 3.34%, respectively. Acoustic waves could increase the treated cotton yield by 11.1%-13.5%, which showed significant difference and average yield increased by 12.7% in the past three years. The effect of treatment was negatively correspondent with the distance between plants and the source of sound. The study show that AFT can both promote vegetative and reproductive growth of cotton, and it can provide a scientific basis for the AFT effects on plant production.
Number of references:22
Main heading:Cotton
Controlled terms:Acoustic waves - Acoustics
Uncontrolled terms:Acoustic frequency - Average yield - Boll weights - Control sites - Cotton production - Cotton yield - Plant height - Plant production - Reproductive growth - Sound waves  - Xinjiang Uygur autonomous region
Classification code:751 Acoustics, Noise. Sound - 751.1 Acoustic Waves - 819.1 Natural Fibers - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.06.030
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 25>
Accession number:20103113111400
Title:Influence of wedge-cam mechanism on starting of radial six-cylinder internal combustion pump
Authors:Jiang, Yong (1); Wang, Xiaodong (1); Yang, Daozhai (1); Zhang, Hongxin (1); Zhang, Tiezhu (1); Zhang, Jipeng (1)
Author affiliation:(1) College of Electromechanic Engineering, Qingdao University, Qingdao 266071, China
Corresponding author:Yang, D.
      (zhx@qdu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:152-156
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Aiming at influence of wedge-cam mechanism on the starting character of radial six-cylinder internal combustion pump, the working principle was described, and the models of mechanical efficiency of wedge-cam mechanism and the resistance torque to crankshaft by springs were constructed. Simulation results showed that the efficiency was more than 97%, which was a incremental parabolic curve versus the wedge angle. The resistance torque sum of all springs was a cosine wave with an amplitude of 4.43 N&middotm and cycle of 120&deg;(CA), which resulted in a starting resistance torque of 4.43 N&middotm to the crankshaft, but had no influence on the starting power. The matching method of starting motor considering the efficiency of wedge-cam mechanism was put forward. The study will provide important base for performance analysis of internal combustion pump and design of starting system.
Number of references:15
Main heading:Mechanisms
Controlled terms:Cams - Combustion - Crankshafts - Cylinders (shapes) - Pumps
Uncontrolled terms:Cam mechanism - Internal combustion - Internal combustion pump - Matching methods - Mechanical efficiency - Parabolic curve - Performance analysis - Simulation result - Starting systems - Wedge angle  - Working principles
Classification code:408.2 Structural Members and Shapes - 521.1 Fuel Combustion - 601.2 Machine Components - 601.3 Mechanisms - 618.2 Pumps
DOI:10.3969/j.issn.1002-6819.2010.06.027
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 26>
Accession number:20103113111426
Title:Spatial-temporal changes of land use and its characteristics in Zigui County under the period of TG Dam project
Authors:Wang, Peng (1); Wu, Bingfang (1); Zhang, Lei (1); Zhou, Yuemin (1); Zhu, Liang (1); Niu, Liming (1); Zhang, Ning (1)
Author affiliation:(1) Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101, China; (2) State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences, Beijing Normal University, Beijing 100101, China
Corresponding author:Wu, B.
      (wubf@irsa.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:302-309
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 find the detailed changes of land resources during the TG Dam project in areas of the head part of the Three Gorges reservoir, based on TM and SPOT data, this study acquired 1:50 000 land use classification results in 1992, 2002 and 2007 in Zigui County, analyzed land use dynamic changes during these different periods. Geographic Information System (GIS) techniques and land use dynamics methods were utilized to depict the characteristics of land use changes. The results of land use changes mainly indicated that garden area increased about 248.14%, dry land area decreased about 20.32%, forest area decreased about 0.59%, grass area decreased about 8.04%, urban and built-up area increased about 141.84%, water area increased about 90.86% during 1992-2007 mainly due to many influential factors of human activities brought by the Three Gorges dam project. The study also analyzed driving forces with conversion matrix in order to seize the mechanism behind land use changes. There were different trends and change velocities in changes of garden, dry land, man-made area and water area during 1992-2002 and 2002-2007 according to the dynamic indices. The characteristics of land use conversion differed greatly in these two periods by land use extent indices. Compared with land use extent results during 2002-2007, human activities had more impacts on land use changes during 1992-2002 mainly because of immigration project, cities and towns relocation and reservoir inundation. It was necessary to provide countermeasures and suggestions further to support the reservoir management in future in Zigui County.
Number of references:24
Main heading:Land use
Controlled terms:Dams - Dynamic analysis - Geographic information systems - Information systems - Information use - Reservoir management - Reservoirs (water)
Uncontrolled terms:Built-up areas - Cities and towns - Conversion matrix - Driving forces - Dry land - Forest area - Human activities - Influential factors - Land resources - Land use dynamics  - Land-use change - Landuse classifications - Spatial-temporal changes - Three Gorges - Three Gorges Dam - Three gorges reservoir - Water areas
Classification code:903.3 Information Retrieval and Use - 903.2 Information Dissemination - 723.3 Database Systems - 512.1.2 Development Operations - 442.2 Land Reclamation - 441.2 Reservoirs - 441.1 Dams - 422.2 Test Methods - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.06.053
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 27>
Accession number:20103113111436
Title:Effects of individual packaging using vacuum bag on 'Suli' pear quality during cold storage
Authors:Chen, Shoujiang (1); Zhang, Min (1)
Author affiliation:(1) Key Laboratory of Food Science and Safety, Jiangnan University, Wuxi 214036, China; (2) Anhui Science and Technology University, Fengyang 233100, China
Corresponding author:Zhang, M.
      (min@jiangnan.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:363-367
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To improve the quality of 'Suli' pear (Pyrus bretschneideri Rehd) during cold storage, fruit were packaged individually in vacuum bags and stored for 1, 2, 3 and 4 weeks at 0-2&deg;C, and then the bags were perforated and the gas in bags was close to air atmosphere. After treatment, fruit were continued to store for up to 120 days. The results showed that the sealed pre-treatment retarded flesh firmness decrease, alleviated decay, decreased weight loss, remained higher content of total soluble solids (TSS) and the titration acid, and green color of peel, and the best packaging periods was 2 weeks. Compared with the cold storage, the new method can maintain postharvest quality of pear fruit better and is a feasible way to keep pear fruit fresh.
Number of references:28
Main heading:Quality control
Controlled terms:Cold storage - Customer satisfaction - Fruits - Packaging - Refrigerators - Total quality management - Vacuum
Uncontrolled terms:After-treatment - Air atmosphere - Green color - In-vacuum - Packaging quality - Pear fruit - Postharvest quality - Pre-Treatment - Total soluble solids - Weight loss
Classification code:922.2 Mathematical Statistics - 913.3 Quality Assurance and Control - 912.2 Management - 912 Industrial Engineering and Management - 821.4 Agricultural Products - 694.4 Storage - 694.1 Packaging - 644.3 Refrigeration Equipment and Components - 633 Vacuum Technology
DOI:10.3969/j.issn.1002-6819.2010.06.063
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 28>
Accession number:20103113111420
Title:Nutrient release characteristic of different crop straws manure
Authors:Dai, Zhigang (1); Lu, Jianwei (1); Li, Xiaokun (1); Lu, Mingxing (2); Yang, Wenbing (2); Gao, Xiangzhao (3)
Author affiliation:(1) College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; (2) Soil and Fertilizer Station of Hubei Province, Wuhan 430064, China; (3) National Agro-Tech Extension and Service Center, Beijing 100125, China
Corresponding author:Lu, J.
      (lujianwei@mail.hzau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:272-276
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 find out the proper proportions of crop straws and chemical fertilizer used in field, characteristic of nutrients release of rice straw, wheat straw and rapeseed straw were studied by method of nylon net bag under waterlogged incubation. The results showed that the decomposition rate of crop straws was much faster at the beginning stage and rapeseed straw decomposed faster than rice straw and wheat straw. And crop straws decomposition rate kept a slowly steady until the end of experiment, which had no obvious difference among three crop straws. After 124 days incubation, the cumulative decomposition rates of rice straw, wheat straw and rapeseed straw were 49.17%, 52.17% and 49.8%, respectively. The sequence of nutrients release rates of the three crop straws were K&gt;P&gt;C&gt;N, while the sequence of nutrients release amount were C&gt;K&gt;N&gt;P. C release rate of rice, wheat and rapeseed straw were up to 57.53, 66.58 and 52.54 percent, and N were up to 42.05, 49.26 and 57.83 percent, and P were up to 68.28, 59.93 and 67.32 percent after 124 days incubation, respectively. For all three crop straws K release rate was 98 percent within the first 12 days of incubation. It was indicated that on the basis of crop straws decomposition characteristics and nutrients release amount the application rates of K fertilizer should be decrease and used in crop growth later stage, while N and P should be maintained as usual practice at early crop growth stage.
Number of references:16
Main heading:Nutrients
Controlled terms:Crops - Fertilizers - Manures
Uncontrolled terms:Application rates - Chemical fertilizers - Crop growth - Decomposition rate - In-field - Manure nutrients - Nutrient release - Release rate - Rice straws - Wheat straws
Classification code:821.5 Agricultural Wastes - 821.4 Agricultural Products - 821.2 Agricultural Chemicals - 822.3 Food Products - 804 Chemical Products Generally - 454.3 Ecology and Ecosystems - 452.3 Industrial Wastes - 461.9 Biology
DOI:10.3969/j.issn.1002-6819.2010.06.047
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 29>
Accession number:20103113111383
Title:Influence of soil surface disposal on precision of measuring soil water by near-infrared spectroscopy
Authors:Han, Xiaoping (1); Wang, Peihua (2); Cui, Chuanjin (1); Gao, Changzhen (1); Zuo, Yueming (1)
Author affiliation:(1) Engineering Technique College, Shanxi Agricultural University, Shanxi 030801, China; (2) Mechanical and Electrical Engineering Department, Luoding Career College, Guangdong 527200, China
Corresponding author:Zuo, Y.
      (zyueming88@yahoo.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:47-51
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 measure fertilizing indexes of soil quickly, precisely and in the field for precision farming, it is a key to improve the accuracy of soil water measurement by finding out the pattern influencing rules of soil surface on the measurement by the near-infrared reflectance spectroscopy, and is also helpful to measure soil nutrients by the reflectance technique. Six soil sample with different water level of soil samples were measured by near-infrared reflectance spectroscopy. By regression analysis, it was found that the correlation between the soil water content and the relative spectral absorptivity by using of a meshwork controlled surface finishing was better than by only ruler finishing. Among the different type of soils, the order of relative absorptivity from high to low is as following, medium loam, heavy loam and light loam. For different partied size of soil with the same surface disposal method, the correlation is the highest for the soil whose particle sizes are within the range of 0.5 to 1 mm. The results showed that the uniformly continuous soil surface was the dominant cause for the improved result and the surface flaw and scratches were the main factors to degrade the measurement accuracy.
Number of references:16
Main heading:Soil surveys
Controlled terms:Agriculture - Finishing - Infrared devices - Infrared spectroscopy - Moisture determination - Particle size - Reflection - Regression analysis - Soil moisture - Textiles  - Underwater soils - Water content - Water levels
Uncontrolled terms:Absorptivities - High-to-low - Measurement accuracy - Near infrared reflectance spectroscopy - Precision farming - Soil nutrients - Soil sample - Soil surfaces - Soil water - Soil water content  - Spectral absorptivity - Surface disposal - Surface finishing - Surface flaw
Classification code:819 Synthetic and Natural Fibers; Textile Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 922.2 Mathematical Statistics - 813.1 Coating Techniques - 931.2 Physical Properties of Gases, Liquids and Solids - 943.2 Mechanical Variables Measurements - 944.2 Moisture Measurements - 941.4 Optical Variables Measurements - 741.3 Optical Devices and Systems - 407.2 Waterways - 444 Water Resources - 471.1 Oceanography, General - 406.2 Roads and Streets - 483.1 Soils and Soil Mechanics - 711 Electromagnetic Waves - 741.1 Light/Optics - 614.2 Steam Power Plant Equipment and Operation
DOI:10.3969/j.issn.1002-6819.2010.06.009
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 30>
Accession number:20103113111431
Title:Effects of low temperature conditioning on chilling injury and quality of cold-stored juicy peach fruit
Authors:Cai, Yan (1); Yu, Meili (1); Xing, Hongjie (1); Di, Huatao (1); Pei, Jiaoyan (1); Xu, Feng (1); Zheng, Yonghua (1)
Author affiliation:(1) College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Zheng, Y.
      (zhengyh@njau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:334-338
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 low temperature conditioning (LTC) in alleviating chilling injury of juicy peach fruit and its optimum conditions were investigated in this study. 'Xiahui No.5' peach fruit were pre-conditioned at temperatures of 4, 8 and 12&deg;C for 2, 4, 6, 8 and 10 days, respectively, and then transferred to 0&deg;C for 28 days followed by 3 days shelf life holding at 20&deg;C. Fruit texture profile analysis and sensory evaluation were done and fruit quality parameters including surface color values, contents of soluble solids and titratable acids, internal browning index and percentage juice were also measured after 3 day shelf-life period. The results indicated that the control fruit directly stored at 0&deg;C without pre-conditioning developed chilling injury symptoms including flesh wooliness and internal browning after 28 days of storage. Fruit pre-conditioned at 4&deg;C also exhibited severe chilling injury manifested as flesh leatheriness. Severe internal browning was observed in fruit pre-conditioned at 8&deg;C. LTC at 12&deg;C for 6 days was found most effective in inhibiting the development of flesh wooliness and internal browning and maintaining sensory quality. These results suggest that LTC at 12&deg;C for 6 days might be a useful technique to alleviate chilling injury and maintain peach fruit quality during cold storage.
Number of references:15
Main heading:Quality control
Controlled terms:Cold storage - Customer satisfaction - Fruits - Low temperature engineering - Refrigerators - Textures - Total quality management
Uncontrolled terms:Browning index - Chilling injury - Fruit quality - Low temperatures - Optimum conditions - Pre-conditioning - Sensory evaluation - Sensory qualities - Shelf life - Soluble solids  - Surface colors - Texture profile analysis - Titratable acid
Classification code:933 Solid State Physics - 922.2 Mathematical Statistics - 913.3 Quality Assurance and Control - 912.2 Management - 912 Industrial Engineering and Management - 821.4 Agricultural Products - 694.4 Storage - 644.4 Cryogenics - 644.3 Refrigeration Equipment and Components
DOI:10.3969/j.issn.1002-6819.2010.06.058
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 31>
Accession number:20103113111377
Title:Influences of different covering materials mulching on soil moisture and corn yield
Authors:Zhang, Jie (1); Ren, Xiaolong (1); Luo, Shifeng (3); Hai, Jiangbo (1); Jia, Zhikuan (2)
Author affiliation:(1) College of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Research Center of Agriculture in the Arid and Semiarid Areas, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) General Station of Henan Rural Energy and Environmental Protection, Zhengzhou 450002, China
Corresponding author:Jia, Z.
      (Zhikuan@tom.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:14-19
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 purpose of promoting rainfall utilization efficiency and mitigating environmental pollution caused by plastic film utilization in dry farming area, plastic film, biodegradable film and liquid film were used to research the rainfall harvesting planting during corn growth period in the arid highland of northern Wei River basin. The results indicated that, when treated with plastic film and biodegradable film covering, the moisture storage of soil at depth range of 0-60 cm increased during the whole growth period of experimental corn sample, and showed a significant difference (P&lt;0.05) comparing with the liquid film covering treat and no covering treat (CK). The spatial variation of soil moisture showed no difference with different mulching materials; plastic film and biodegradable film covering efficiently improved the soil moisture storage and enhanced the moisture storage stability of soil at depth range of 0-200 cm. When treated with plastic film and biodegradable film covering, the grain yield of corn increased by 19.96% and 19.67% respectively, and the water use efficiency increased by 32.08% and 31.81%, respectively. Therefore, biodegradable film and plastic film has significant effect on soil water conservation and corn yield, and shows no big difference between them, biodegradable film can be used in agricultural production in replace of the plastic film.
Number of references:28
Main heading:Film growth
Controlled terms:Biodegradable polymers - Crops - Liquid films - Moisture determination - Plastic films - Protective coatings - Rain - River pollution - Rivers - Soil conservation  - Soil moisture - Underwater soils - Water conservation - Water supply - Watersheds
Uncontrolled terms:Agricultural productions - Arid highland of northern Wei River basin - Biodegradable film - Corn growth - Corn yields - Covering material - Depth range - Dry farming - Environmental pollutions - Grain yield  - Growth period - Moisture storage - Mulching material - Soil-water conservation - Spatial variations - Utilization efficiency - Water use efficiency - Wei river
Classification code:801.2 Biochemistry - 813.1 Coating Techniques - 813.2 Coating Materials - 815.1 Polymeric Materials - 712.1 Semiconducting Materials - 817.1 Polymer Products - 821.4 Agricultural Products - 931.2 Physical Properties of Gases, Liquids and Solids - 944.2 Moisture Measurements - 821.3 Agricultural Methods - 539.2.2 Protecting Materials - 407.2 Waterways - 443.3 Precipitation - 444 Water Resources - 444.1 Surface Water - 403.1 Urban Planning and Development - 446.1 Water Supply Systems - 454 Environmental Engineering - 471.1 Oceanography, General - 483.1 Soils and Soil Mechanics - 453 Water Pollution
DOI:10.3969/j.issn.1002-6819.2010.06.003
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 32>
Accession number:20103113111427
Title:Application of clustering analysis to land use zoning of coastal region in Jiangsu Province
Authors:Zhao, Rongqin (1); Huang, Xianjin (1); Zhong, Taiyang (1); Xu, Hui (1)
Author affiliation:(1) School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China; (2) College of Resources and Environment, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China
Corresponding author:Huang, X.
      (hxj369@nju.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:310-314
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Land use zoning is an important aspect of comprehensive land use planning, and is also the embodiment and implementation of land use structure arrangement. The aim of this paper is to provide theoretical direction for land use and the future development of coastal region in Jiangsu Province. Considering the situation and characteristics of land us of coastal region in Jiangsu Province, according to the evaluation indicators of China's Main Functional Regions, this paper established evaluation indicator system for land use zoning through selecting three first class indicators (resource and environment carrying capacity, current exploiting density and development potential) and twelve second class indicators. Then systematic clustering analysis was made on the 20 administrative units of coastal region in Jiangsu Province by using SPSS. According to the practical situation and exploiting extent of the coastal region, it was divided into four sub-regions: Optimized development region, which includes Lianyungang Ciry, Nantong City and Yancheng City. Coastal potential region, which includes Rudong County, Dafeng City and Dongtai City. Important development region, which includes Haian County, Qidong County, Rugao County, Tongzhou City and Haimen City. General development region, includes other nine counties. At last, the main problems and future development direction in land use for each sub-regions were put forward according to the similarity and discrepancy among different regions. The results indicate that land use zoning based on evaluation indicators of China's Main Functional Regions are very important to regional land use practice and structure arrangement.
Number of references:13
Main heading:Land use
Controlled terms:Coastal zones - Zoning
Uncontrolled terms:Carrying capacity - Clustering analysis - Coastal regions - Development directions - Development potential - Evaluation indicator system - Evaluation indicators - Jiangsu province - Land Use Planning - Land use zoning  - Potential region - Resource and environment - Sub-regions
Classification code:901.4 Impact of Technology on Society - 471 Marine Science and Oceanography - 442.2 Land Reclamation - 407.3 Coastal Engineering - 403.2 Regional Planning and Development - 403.1 Urban Planning and Development - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.06.054
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 33>
Accession number:20103113111376
Title:Impact of climatic warming on soil salinity and irrigation amount of Yellow River irrigation areas in Ningxia Hui Autonomous Region
Authors:Xiao, Guoju (1); Zhang, Qiang (2); Li, Yu (2); Zhang, Fengju (1); Wang, Runyuan (2); Luo, Chengke (1)
Author affiliation:(1) New Technology Application Research, Development Center of Ningxia University, Yinchuan 750021, China; (2) Gansu Key Laboratory of Arid Climate Changes and Disaster Reduction, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China
Corresponding author:Xiao, G.
      (xiaoguoju1972@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:7-13
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:Climatic warming has intensified soil moisture evaporation and led the soil salinity moving upward, which results in salinity increase and aggravated the harm of saline and alkaline of the soil. This paper has, on the basis of location observational data of soil salinity and meteorological data in the recent 35 years, researched the influence of climatic warming on soil salinity change of Yellow River irrigation areas in Ningxia Hui Autonomous Region. The result shows that the total soil salt content has been an increasing trend because of global climatic warming in the recent 35 years, and total salt content of light, moderate and severe salty soil has increased by 0.08 g/kg, 0.13 g/kg and 0.19 g/kg, respectively, in Yellow River irrigation areas in Ningxia Hui Autonomous Region. When the temperature increased by 0.5-3.0&deg;C, the irrigation amount of light, moderate and severe salty soil has increased by 8.2%-9.1%, 8.2%-8.7% and 8.3-8.8%, respectively, and the total irrigation amount has been increased by 129-140 million m³.
Number of references:35
Main heading:Climate change
Controlled terms:Irrigation - Meteorology - Rivers - Salinity measurement - Soil moisture
Uncontrolled terms:Climatic warming - Irrigation area - Meteorological data - Observational data - Salt content - Salty soil - Soil salinity - Soil salt content - Soil-soil - Yellow river
Classification code:821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 471.4 Seawater, Tides and Waves - 451 Air Pollution - 943.3 Special Purpose Instruments - 444.1 Surface Water - 443.1 Atmospheric Properties - 443 Meteorology - 407.2 Waterways - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.06.002
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 34>
Accession number:20103113111409
Title:Soil moisture inversion using multi-polarization and multi-angle ENVISAT ASAR data in surface soils of bare area and wheat-covered area
Authors:Wang, Junzhan (1); Bao, Yansong (2); Zhang, Youjing (3); Qu, Jianjun (1); Zhang, Weimin (1)
Author affiliation:(1) Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; (2) Key Laboratory of Meteoroglogical Disaser of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China; (3) School of Earth Sciences and Engineering, HoHai University, Nanjing 210098, China
Corresponding author:Bao, Y.
      (baoys@sohu.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:205-210
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 moisture (Ms) is an important parameter for agricultural, meteorological and hydrographic studies. In order to monitoring soil moisture better, this paper is focused on the Ms estimation methodology based on the multi-polarization and multi-angle advanced synthetic aperture radar (ASAR) data. For the bare soil surface, the inversion model was built based on the simulated data using Advance Integral Equation Model (AIEM). In a wheat-covered area, the HH polarization backscattering coefficient at a low incidence angle was significantly positively correlated with Ms, however, the HH polarization backscattering coefficient at a high incidence angle was significantly positively correlated with the vegetation water content (Mv). Mv is an important parameter of the water-cloud model, so the ASAR data at HH polarization and high incidence angle was used to separate the contribution of wheat canopy backscatter coefficient from the total SAR backscatter coefficient. Then a semi-empirical model was developed to estimate Ms in a wheat-covered area based on the multi-angle ASAR data. Validation was performed by the measured data, the precision of Ms estimation for the bare soil surface and the wheat-covered area was 3.55% and 3.81% respectively. The semi-empirical model has a quite good estimation precision.
Number of references:28
Main heading:Geologic models
Controlled terms:Backscattering - Computer simulation - Dielectric properties - Estimation - Hydrographic surveys - Imaging systems - Moisture control - Moisture determination - Polarization - Radar  - Soil moisture - Soil surveys - Synthetic aperture radar - Synthetic apertures - Water content
Uncontrolled terms:Advanced synthetic aperture radar - Advanced synthetic aperture radars - Area-based - ASAR data - Backscatter coefficients - Backscattering coefficients - Bare soil surface - Cloud models - Envisat ASAR data - Estimation methodologies  - High incidence - Incidence angles - Integral equation models - Inversion models - Measured data - Multi-angle - Multi-polarization - SAR backscatter - Semiempirical models - Simulated data  - Surface soil - Vegetation water content - Wheat canopy
Classification code:944.2 Moisture Measurements - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 731.3 Specific Variables Control - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 746 Imaging Techniques - 751.1 Acoustic Waves - 921 Mathematics - 931.2 Physical Properties of Gases, Liquids and Solids - 711.1 Electromagnetic Waves in Different Media - 406.2 Roads and Streets - 444 Water Resources - 471.1 Oceanography, General - 471.4 Seawater, Tides and Waves - 711 Electromagnetic Waves - 481.1 Geology - 701 Electricity and Magnetism - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2010.06.036
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 35>
Accession number:20103113111385
Title:Topographic characteristics of ephemeral gully erosion in Loess hilly and gully region based on RS and GIS
Authors:Qin, Wei (1); Zhu, Qingke (2); Zhao, Leilei (2); Kuang, Gaoming (2)
Author affiliation:(1) Department of Sedimentation, China Institute of Water Resources and Hydropower Research, Beijing 100044, China; (2) Key Laboratory of Soil and Water Conservation and Desertification Combating, Beijing Forestry University, Beijing 100083, China
Corresponding author:Zhu, Q.
      (xiangmb@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:6
Issue date:June 2010
Publication year:2010
Pages:58-64
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 series of ephemeral gullies and their topographic parameters were extracted from high resolution remote sensing image Quickbird and Digital Elevation Model (DEM), and analyzed by statistical methods in order to realize the topographic characteristics of ephemeral gully erosion on hill slope in the Loess Plateau. The results showed that the number of ephemeral gully within hill slope was mainly influenced by slope steepness, slope length, aspects and upslope length. The topographic characteristics of ephemeral gully erosion depended on slope steepness, slope length, upslope length and upslope drainage area. The average length of ephemeral gullies within hill slope was linearly correlated with slope length significantly. There was a quadratic curve relation between slope steepness and frequency of ephemeral gully, slope steepness of ephemeral gully and its upslope length. The upper limit of critical slope steepness of ephemeral gully erosion was between 26&deg; and 27&deg;, and the lower limit was between 15&deg; and 20&deg;. In addition, the critical slope length ranged from 50 to 80 m. The critical curve of ephemeral gully distribution was determined based on the sine value of slope steepness of ephemeral gully and upslope drainage area of ephemeral gully. The average length of ephemeral gullies within sunny slope was less than that within shady slope. This study provides an effectual technological support for water and soil conservation on hill slop in loess area.
Number of references:16
Main heading:Surveying
Controlled terms:Catchments - Geographic information systems - Image reconstruction - Information systems - Remote sensing - Soil conservation
Uncontrolled terms:Average length - Critical curve - Digital elevation model - Drainage area - Geographical Information System - Geographical information systems - Gully erosion - High resolution remote sensing images - Loess area - Loess hilly and gully region  - Loess Plateau - Lower limits - Quadratic curves - Quickbird - Region-based - RS and GIS - Slope length - Slope steepness - Technological supports - Upper limits
Classification code:903.2 Information Dissemination - 821.3 Agricultural Methods - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 903.3 Information Retrieval and Use - 723.3 Database Systems - 483.1 Soils and Soil Mechanics - 444 Water Resources - 405.3 Surveying - 723.2 Data Processing and Image Processing
DOI:10.3969/j.issn.1002-6819.2010.06.011
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 36>
Accession number:20103113111434
Title:Finite element analysis and experimental verification of wheat grain under compression loads
Authors:Zhang, Keping (1); Huang, Jianlong (1); Yang, Min (3); Zhang, Fengwei (2); Huang, Xiaopeng (2); Zhao, Chunhua (2)
Author affiliation:(1) School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (2) School of Engineering, Gansu Agricultural University, Lanzhou 730070, China; (3) College of Science, Gansu Agricultural University, Lanzhou 730070, China
Corresponding author:Huang, J.
      (huangjianlonglut@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:352-356
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to reduce the mechanical damage of wheat grain in the harvest, storing, transporting process and master the comminution mechanism, mechanical model of compressing wheat grain was established by the finite Element Method, and the stress distribution was analyzed. Compression tests had been conducted on wheat grain at different moisture contents by using universal hydraulic test equipment. Three types compression tests results showed that the elastic modulus of wheat grain was 98.86-206.59 MPa, the yield strength was 0.8-1.95 MPa, the failure load are 63.44-154.77 N, the maximum strain was 0.71%-1.02%. The results showed that the failure load, elastic modulus and yield strength were descended obviously with the increase of moisture contents. The failure load of B type was maximum and H was the minimum with the same moisture contents. Meanwhile the elastic modulus and yield strength of B and L were higher than H. The main failure form of wheat grain is the cracks appearing near the ventral groove. The compression test results and Finite Element solutions were compared, which showed that the maximal difference between them was 12%. The simulation numerical solution is confirmed by comparing with the experiment data.
Number of references:16
Main heading:Finite element method
Controlled terms:Compression testing - Elastic moduli - Grain (agricultural product) - Grinding (comminution) - Hydraulic machinery - Mechanics - Moisture - Moisture determination - Stress concentration - Yield stress
Uncontrolled terms:Compression loads - Compression tests - Experiment data - Experimental verification - Failure forms - Failure load - Finite element analysis - Finite element solution - Hydraulic tests - Mechanical damages  - Mechanical model - Moisture content - Moisture contents - Numerical solution - Stress distribution - Wheat grains - Yield strength
Classification code:951 Materials Science - 944.2 Moisture Measurements - 943 Mechanical and Miscellaneous Measuring Instruments - 931.1 Mechanics - 921.6 Numerical Methods - 821.4 Agricultural Products - 802.3 Chemical Operations - 801.4 Physical Chemistry - 632.2 Hydraulic Equipment and Machinery - 443.1 Atmospheric Properties - 422.2 Test Methods - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2010.06.061
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 37>
Accession number:20103113112906
Title:Design and experiment on twist type ridge-clear device
Authors:Wang, Qingjie (1); Li, Hongwen (1); He, Jin (1); Lu, Caiyun (1); Su, Yanbo (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Li, H.
      (lhwen@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:6
Issue date:June 2010
Publication year:2010
Pages:109-113
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:From the view of the existing problems, such as straw blocking, high energy consumption, too many straw covered after planting in the seedbed, a twist type ridge-clear device for corn ridge till and no-till planter was designed. Field experiment that covered with broken stalks of corn showed that the soil disturbance was 18.3%-26%, the straw percentage of coverage was decreased by 35%-53% in the seedbed, which met the challenges of conservation tillage and was favorable for improving the seeding. Compared with the strip-roto tilling ridge till and no-till planter, the ridge till and no-till planter with twist type ridge-clear could reduced fuel consumption by 13.8%. Therefore the twist type ridge-clear solved the problems of high power consumption with strip-rototilling device, and also created the clean seedbed. This experiment showed that it was significantly important to popularize and apply for ridge-till and no-till seeders in the northeast area of China.
Number of references:14
Main heading:Agricultural machinery
Controlled terms:Agriculture - Experiments - Machine design - Mechanical engineering - Mechanical testing - Soil conservation
Uncontrolled terms:Conservation tillage - Existing problems - Field experiment - High energy consumption - High power consumption - No-till - No-till planter - No-till planters - Roto-tilling - Soil disturbances
Classification code:943.2 Mechanical Variables Measurements - 901.3 Engineering Research - 821.3 Agricultural Methods - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 608 Mechanical Engineering, General - 601 Mechanical Design - 483.1 Soils and Soil Mechanics - 422 Strength of Building Materials; Test Equipment and Methods
DOI:10.3969/j.issn.1002-6819.2010.06.019
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 38>
Accession number:20103113111425
Title:Evaluation of greenhouse gas emissions from scale dairy farm
Authors:Sun, Ya'nan (1); Liu, Jijun (1); Ma, Zonghu (1)
Author affiliation:(1) College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (2) State Key Laboratory of Animal Nutrition, Beijing 100193, China
Corresponding author:Liu, J.
      (liujijun@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:6
Issue date:June 2010
Publication year:2010
Pages:296-301
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to quantitative greenhouse gas (GHG) emissions at the organization level and provide the most efficient GHG mitigation measures for enterprise, a scale dairy farm was studied in Baoding of Hebei Province. Based on scenario analysis, the detailed greenhouse gas emission and removals inventory were assessed at the organization level using methodology approved by executive board (EB) of clean development mechanism (CDM) under United Nation framework convention on climate change (UNFCCC), IPCC emission coefficient and related literature. Case study indicated that using traditional operating management and current manure management system, the greenhouse gas emission was estimated to be 11333.2 t CO<inf>2</inf>-e per year or 4.9 t CO<inf>2</inf>-e/head per year with 2300 dairy cattle. Some mitigation measures have been proposed to reduce GHG emissions. It has significance in emission reduction of same scale dairy farm.
Number of references:20
Main heading:Gas emissions
Controlled terms:Dairies - Emission control - Farms - Global warming - Greenhouse gases - Greenhouses - Manures - Renewable energy resources
Uncontrolled terms:Clean Development Mechanism - Dairy cattles - Dairy farms - Emission coefficient - Emission reduction - Executive Board - GHG emission - GHG mitigation - Hebei Province - Manure management system  - Mitigation measures - Operating management - Scenario analysis - United Nations
Classification code:821.6 Farm Buildings and Other Structures - 821.5 Agricultural Wastes - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 525.1 Energy Resources and Renewable Energy Issues - 822.1 Food Products Plants and Equipment - 452.3 Industrial Wastes - 451.1 Air Pollution Sources - 451 Air Pollution - 443.1 Atmospheric Properties - 402.1 Industrial and Agricultural Buildings - 451.2 Air Pollution Control
DOI:10.3969/j.issn.1002-6819.2010.06.052
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 39>
Accession number:20103113111430
Title:Evaluation and optimization of spatial distribution of rural settlements based on GIS
Authors:Zhu, Xuexin (1); Wang, Hongmei (1); Yuan, Xiujie (2); Hou, Xinxin (3)
Author affiliation:(1) College of Natural Resources and Environment, Northeast Agricultural University, Harbin 150030, China; (2) Management College, Qingdao Technological University, Qingdao 266520, China; (3) College of Public Management, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Wang, H.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:326-333
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:It is necessary to provide transfer, merging, withdrawal and other activities for land consolidation which is performed for the connecting of rural-urban construction land use in Qingyuan City, Guangdong Province where the contradiction of land uses is sharp. This paper divided rural settlements of Fogang County into five arrangement types with the spatial analysis and statistical function of ARCGIS, according to suitability rank of natural, social, economic and environmental factors and applying the method of minimum limiting factors. The five types were urban transformation type, urban-rural combination type, development type, limiting development type and migration type. Rural settlement buffers were divided into priority rank areas which can be transformed into construction land, according to limiting levels of spatial expansion factors of rural settlement. Applying priority rank areas and the predictive value of rural settlement scale in Fogang County in 2020, different arrangement types adopted different ways to optimize the spatial distribution of rural settlement. The results of optimization were that urban transformation type and migration type are totally transformed into other land uses, urban-rural combination type expands to 1108.04 hm², and limiting development type reduces to 753.1 hm². The purpose of this paper is to provide scientific basis for land consolidation in rural area.
Number of references:20
Main heading:Optimization
Controlled terms:Land use - Rural areas - Size distribution - Spatial variables measurement
Uncontrolled terms:Construction land - Environmental factors - Guangdong Province - Limiting factors - Location optimization - Predictive values - Residential areas - Rural settlement - Spatial analysis - Spatial distribution  - Spatial expansion - Statistical functions - Suitability evaluation - Urban construction - Urban-rural
Classification code:933.1 Crystalline Solids - 931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 921.5 Optimization Techniques - 901.4 Impact of Technology on Society - 943.2 Mechanical Variables Measurements - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 442.2 Land Reclamation - 423 Non Mechanical Properties and Tests of Building Materials - 403.2 Regional Planning and Development - 403 Urban and Regional Planning and Development - 531.2 Metallography
DOI:10.3969/j.issn.1002-6819.2010.06.057
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 40>
Accession number:20103113111411
Title:Spectral characterization and nutrient prediction of litchi canopy leaves during flower bud differentiation
Authors:Wang, Yingfang (1); Chen, Shuisen (1); Li, Dan (1); Zhou, Xia (1); Wang, Jianfang (5)
Author affiliation:(1) Guangdong Open Laboratory of Geo-spatial Information Technology and Application, Guangzhou Institute of Geography, Guangzhou 510070, China; (2) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; (3) Key Laboratory of Resources Remote Sensing and Digital Agriculture, Ministry of Agriculture, Beijing 100081, China; (4) Graduate School, Chinese Academy of Sciences, Beijing 100049, China; (5) College of Informatics, South China Agriculture University, Guangzhou 510642, China
Corresponding author:Wang, Y.
      (scau.wyf@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:216-225
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to achieve efficient monitoring of litchi nutrient and elevate the litchi management level in precision fertilizing, the research on the litchi nutrient and the spectral data of litchi canopy leaves during flower bud differentiation was performed serving to high yield and safety production of litchi planting in South China. The four forms of spectral data were analyzed. The results showed that the spectrum of litchi canopy leaves had common spectral characteristics of a plant. Based on the laboratory analysis on total nitrogen, total phosphorus, chlorophyll, and organic C, the relationships between spectral data and nutrients were investigated. Those spectral bands with the most significant correlation were chosen to create regression forecasting equations. The results showed that the first-order derivative of reflectance had the capability to estimate chlorophyll and organic C, and the sensitive diagnostic bands were at 1 562 nm (r=0.8944) and 1 720 nm (r=0.7827), respectively. The most-sensitive diagnostic spectral bands of total nitrogen and total phosphorus were the first-order derivative of reflectance spectrum at 2 059 nm (r=0.8073), 1 347 nm (r=0.7575), respectively. The exponential function was best for predicting the total nitrogen (RMSE=0.002730), chlorophyll (RMSE=0.008138) and organic C (RMSE=0.000416). Linear function fitted the prediction of total phosphorus best (RMSE=0.000336). The results have great significance on implementation of precision fruit agriculture and the environmental protection of litchi agriculture in South China.
Number of references:24
Main heading:Nutrients
Controlled terms:Agriculture - Chlorophyll - Exponential functions - Forecasting - Interferometry - Nitrogen - Phosphorus - Porphyrins - Reflection - Spectrum analysis  - Spectrum analyzers
Uncontrolled terms:A plants - Canopy - Canopy leaves - Correlation analysis - Efficient monitoring - First-order derivative - Flower buds - High yield - Laboratory analysis - Linear functions  - Management level - Reflectance spectrum - Safety production - South China - Spectral band - Spectral characteristics - Spectral characterization - Spectral data - Total nitrogen - Total phosphorus
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 822.3 Food Products - 912.2 Management - 921 Mathematics - 922.2 Mathematical Statistics - 941 Acoustical and Optical Measuring Instruments - 941.4 Optical Variables Measurements - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 821.2 Agricultural Chemicals - 454.3 Ecology and Ecosystems - 461.9 Biology - 711 Electromagnetic Waves - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 741.1 Light/Optics - 804 Chemical Products Generally - 804.1 Organic Compounds - 801.2 Biochemistry
DOI:10.3969/j.issn.1002-6819.2010.06.038
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 41>
Accession number:20103113111414
Title:Simulation of air temperature and relative humidity in plastic greenhouse tunnel covered with insect-proof nets in lower reaches of Yangtze River
Authors:Li, Jun (1); Yao, Yiping (3); Xu, Rui (1); Han, Xianbo (1); Dai, Jianfeng (1); Zhang, Hongju (1); Hu, Ning (1); Luo, Weihong (1)
Author affiliation:(1) College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China; (2) Shanghai Climate Center, Shanghai 200030, China; (3) Zhejiang Climate Center, Hangzhou 310037, China
Corresponding author:Luo, W.
      (lwh@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:6
Issue date:June 2010
Publication year:2010
Pages:238-244
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 forecast the air temperature and relative humidity inside a plastic tunnel with insect-proof nets, a model for simulating the air temperature and humidity inside a plastic greenhouse tunnel covered with insect-proof nets was developed based on the energy and mass balance analysis. Experiments were carried out in a plastic greenhouse tunnel covered with insect-proof nets located in Shanghai City to collect data to validate the model. The model can predict the air temperature and humidity inside the plastic greenhouse tunnel covered with insect-proof nets with such inputs as the outside hourly weather data (global radiation, temperature, relative humidity, wind speed, air pressure), information of greenhouse structure (volume, cover surface area, area of vents, floor area), transmittance of cover material and porosity of the insect-proof net material, and crop information (canopy leaf area index and leaf width). The results showed that the simulated air temperature and relative humidity inside the plastic greenhouse tunnel agreed well with the measured data. The determination coefficient (R2) between the simulation and measured air temperature inside the plastic greenhouse tunnel under sunny, cloudy, and overcast conditions was 0.93, 0.92, and 0.87, respectively, and the root mean squared error (RMSE) was 1.3, 1.4, and 0.9&deg;C, respectively. The R2 between the simulation and measured air relative humidity inside the plastic greenhouse tunnel under sunny, cloudy, and overcast conditions was 0.91, 0.90, and 0.89, respectively, and the RMSE was 4.1%, 4.7%, and 3.2%, SE was 4.8%, 5.6%, and 3.8%, respectively. The model can be used for the optimisation of the greenhouse tunnel structure as well as for the improvement of greenhouse tunnel climate management.
Number of references:25
Main heading:Plastics
Controlled terms:Atmospheric humidity - Atmospheric pressure - Atmospheric radiation - Atmospheric temperature - Climate models - Computer simulation - Forestry - Greenhouses - Moisture - Weather forecasting
Uncontrolled terms:Air temperature - Plastic tunnels - Proof net - Relative humidities - Simulation model
Classification code:921 Mathematics - 821.6 Farm Buildings and Other Structures - 821.0 Woodlands and Forestry - 817.1 Polymer Products - 801.4 Physical Chemistry - 723.5 Computer Applications - 443.1 Atmospheric Properties - 443 Meteorology - 402.1 Industrial and Agricultural Buildings
DOI:10.3969/j.issn.1002-6819.2010.06.041
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 42>
Accession number:20103113111407
Title:Simulation of leaf extending character in super-maize based on cantilever beam
Authors:Chen, Guoqing (1); Liu, Wei (1); Zhang, Jiwang (1); Liu, Peng (1); Dong, Shuting (1); Wang, Hongmei (2)
Author affiliation:(1) State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agriculture University, Tai'an 271018, China; (2) Huafeng Town Agrotechnology Extension Station, Ningyang County, Tai'an 271400, China
Corresponding author:Zhang, J.
      (jwzhang@sdau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 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:The objective of this experiment is to quantify the leaf extending character and provide methodological support for morphogenesis simulation model in super-maize, which the cantilever beam theory was used. The same leaf was divided into many basic units, and each basic unit represented a cantilever beam. The simulation model of leaf extending in super-maize during the whole growth phase was developed. The observed data on super-maize leaf in different population were used to verify the model. The results show that RMSE of extending coordinate of different leaves were less than 30%, and the 80% predicted D value was greater than 0.7. So the model has a better simulation of the leaf extending character in super-maize and the method using the cantilever beam in simulation of super-maize leaf extending character is feasible.
Number of references:20
Main heading:Computer simulation
Controlled terms:Atomic force microscopy - Cantilever beams - Character recognition - Nanocantilevers - Pile foundations - Population statistics
Uncontrolled terms:Growth phase - Leaf extending - Observed data - Simulation model
Classification code:931.3 Atomic and Molecular Physics - 931.1 Mechanics - 922.2 Mathematical Statistics - 761 Nanotechnology - 933 Solid State Physics - 741.3 Optical Devices and Systems - 723 Computer Software, Data Handling and Applications - 483.2 Foundations - 408.2 Structural Members and Shapes - 723.5 Computer Applications
DOI:10.3969/j.issn.1002-6819.2010.06.034
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 43>
Accession number:20103113111387
Title:Soil infiltration capacity and its influencing factors of different land use types in Karst slope
Authors:Zhang, Zhiwei (1); Zhu, Zhangxiong (1); Wang, Yan (1); Fu, Wali (1); Wen, Zhilin (1)
Author affiliation:(1) School of Geographic Sciences, Southwest University, Chongqing 400715, China; (2) Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Chongqing 400715, China
Corresponding author:Zhang, Z.
      (zflyzzw@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:6
Issue date:June 2010
Publication year:2010
Pages:71-76
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 soil infiltration capability and analyze its influencing factors in Karst region, this paper studied soil infiltration curves and their characteristics of four land use patterns in a Karst hill by using infiltration ring. Soil bulk density, porosity, soil particle-size distribution, water-stable aggregates and organic matter were also measured. The study indicated that, soil infiltration rates and permeability in surface layers of the four land use types were similar, but big difference existed in sub-layers between dry lands and other land use patterns. Land utilization was an important factor which should be responsible for the variation of infiltrability. Stable infiltration rates in soils, under natural conditions, were very high; cultivation and deforestation appeared to increase soil bulk density, while also reducing organic matter, water-stable aggregates and infiltration rates. Initial and stable infiltration rates changed in the same order: shrub land&gt;orchard&gt;grass land&gt;dry land. Mean value of stable infiltration rates of sub-layers (15-30 cm) in shrub profiles was 8.11 mm/min, which was much higher than that of dry land (0.46 mm/min). The lowest value of stable infiltration rates in shrub soils was 4.22 mm/min that was thirty three times of dry lands (0.13 mm/min). Obstacle layers associated with low infiltration rates existed in sub-layers of dry land profiles. There were significant positive correlations between permeability and organic matter, soil porosity and water-stable aggregates. Water-stable aggregates and soil organic matter were the principal influential factors which affect infiltrability in Karst slope. This research provides theoretical basis of exploring and utilizing Karst water resource, soil and water resource conservation.
Number of references:17
Main heading:Soil mechanics
Controlled terms:Agglomeration - Aggregates - Biogeochemistry - Biological materials - Deforestation - Land use - Landforms - Moisture determination - Organic compounds - Porosity  - Seepage - Slope protection - Soil conservation - Soil moisture - Water conservation - Water resources
Uncontrolled terms:Different land use types - Dry land - Infiltration rate - Influencing factor - Influential factors - Karst slope - Karst water resources - Land use pattern - Land use type - Land utilization  - Mean values - Natural conditions - Organic matter - Positive correlations - Resource conservation - Soil and water - Soil bulk density - Soil infiltration - Soil organic matters - Soil particles  - Soil Porosity - Stable aggregates - Sub-layers - Surface layers - Theoretical basis
Classification code:481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 802.3 Chemical Operations - 481.1 Geology - 804.1 Organic Compounds - 821.3 Agricultural Methods - 931.2 Physical Properties of Gases, Liquids and Solids - 944.2 Moisture Measurements - 821.0 Woodlands and Forestry - 461.2 Biological Materials and Tissue Engineering - 403.1 Urban Planning and Development - 406 Highway Engineering - 407 Maritime and Port Structures; Rivers and Other Waterways - 407.1 Maritime Structures - 403 Urban and Regional Planning and Development - 412.2 Concrete Reinforcements - 441.1 Dams - 442.2 Land Reclamation - 444 Water Resources - 441 Dams and Reservoirs; Hydro Development
DOI:10.3969/j.issn.1002-6819.2010.06.013
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 44>
Accession number:20103113111394
Title:Test on limit turning speed of eccentric round hole-wheel seedmeter for rape
Authors:Wu, Mingliang (1); Guan, Chunyun (2); Gao, Xiaoyan (1); Luo, Haifeng (1); Tang, Chuzhou (1)
Author affiliation:(1) College of Engineering, Hunan Agricultural University, Changsha 410128, China; (2) Oilseeds Crops Institute, Hunan Agricultural University, Changsha 410128, China
Corresponding author:Wu, M.
      (mingliangwu0218@sohu.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:119-123
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to adjust seeding rate via the rotate speed and provide with the theories for designing high-speed and high performance seeder, the limit turning speed test was done. The test aimed at the eccentric round hole-wheel seedmeter seeding three rows each time on the performance test bed. The test studied the limit rotate speed in working order and the relation between the rotate speed and seeding amount, seeding uniformity and the consistency of total seeding amount in each row, respectively, and set up the mathematical model about the relationship between unit seeding amount and speed. The results showed that the limit turning speed did not exceed 70 r/min and the lowest turning speed was not less than 30 r/min. Its seeding uniformity was 13.09%-30.09% and the consistency of total seeding amount in each row was 3.28%-4.70%. There was a linear relation between unit seeding amount and speed. The results provide data and theory for designing a rape high-speed seeder and further study on the rotate speed and seeding quantity.
Number of references:21
Main heading:Mathematical models
Controlled terms:Agricultural machinery - Equipment testing - Seed - Speed - Turning - Wheels
Uncontrolled terms:High-speed - Homogeneity - Linear relation - Performance tests - Rotate speed - Seeding rate - Speed test
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 931.1 Mechanics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 921 Mathematics - 821.1 Agricultural Machinery and Equipment - 604.2 Machining Operations - 601.2 Machine Components - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.06.021
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 45>
Accession number:20103113111375
Title:Status and thoughts of Chinese "agricultural North-to-South water diversion virtual engineering"
Authors:Wu, Pute (1); Zhao, Xining (1); Cao, Xinchun (1); Hao, Shilong (1)
Author affiliation:(1) College of Water Resources and Architectural Engineering, Northwest A and F University, Yangling 712100, China; (2) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (3) National Engineering Research Center for Water Saving Irrigation at Yangling, Yangling 712100, 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:6
Issue date:June 2010
Publication year:2010
Pages:1-6
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on the variable analysis of Chinese north and south grain transfer and combined agricultural water footprint theory, this paper puts forward that at the same time of implementing South-to-North water diversion entity engineering construction, the "agricultural North-to-South water diversion virtual engineering" has been formed and carried out since 1990. The calculating results showed that: this engineering has transferred over 20 billion cubic meters virtual water from 1990 to 2008, which was much more than transfer scale of South-to-North water diversion entity engineering. The water transfer amount of North-to-South water diversion virtual engineering showed an overall increasing tendency, it was hard to support food production in northern China only by South-to-North water diversion entity engineering, so it became a only solution for this problem to vigorously develop modern water-saving agriculture and improve the comprehensive water efficiency of food production by using technology. Considering the realistic gap of economic condition between south and north China and the extended service of South-to-North agriculture water diversion, researchers suggested that, implementing regional virtual water trade strategy, at the same time, reinforcing the research of the evolution and management of regional agricultural water footprint, making relevant technical standards of regional agricultural water footprint. It will provide scientific basis and policy support for implementation of the regional virtual water trade.
Number of references:25
Main heading:Grain (agricultural product)
Controlled terms:Agriculture - Commerce - Engineering - Flood control - Water conservation - Water supply
Uncontrolled terms:North-to-South water diversion virtual engineering - Virtual engineering - Virtual water trade - Water diversions - Water footprint
Classification code:914.1 Accidents and Accident Prevention - 911.4 Marketing - 911.2 Industrial Economics - 901 Engineering Profession - 821.4 Agricultural Products - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 454.1 Environmental Engineering, General - 446.1 Water Supply Systems - 444 Water Resources - 442.1 Flood Control - 403.1 Urban Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.06.001
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 46>
Accession number:20103113111435
Title:Regression analysis of instrumental texture characteristics and sensory characteristics of pork
Authors:Chen, Lei (1); Wang, Jinyong (2); Li, Xuewei (1)
Author affiliation:(1) Chongqing Academy of Animal Science, Chongqing 402460, China; (2) College of Animal Science and Technology, Sichuan Agricultural University, Ya'an 625014, China
Corresponding author:Li, X.
      (lixuewei@ya-public.sc.cninfo.net)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:357-362
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:In order to analyze the correlation between sensory attributes and instrumental texture characteristics of pork, and validate model for predict sensory attributes, two instrumental methods for assessing texture characteristics of pork, warner-bratzler (W-B) and texture profile analysis (TPA), were conducted on 54 samples of m. longissimus dorsi muscle from 18 DLY commercial pigs, aging at 24, 72 and 144 hours post-mortem. A trained panelists sensory analysis was also performed on the similar 54 samples. The results showed that, most of the instrumental measures were significantly or marked significantly correlated (P&lt;0.05 or P&lt;0.01) with sensory texture characteristics. Principal component-stepwise regression analysis were used to generate prediction equations with the data of TPA and warner-bratzler measures as independent variables respectively and the data of sensory analysis as dependent variable. The prediction equations of sensory hardness, springiness and juiciness were of significance in statistics and the determination coefficients were 61.46%, 39.77% and 42.34%, respectively. Therefore, the widespread correlation between sensory attributes and instrumental texture characteristics of pork are comfirmed, and the prediction efficiency of meat sensory attributes prediction model is brought to a new level by more proper testing and statistical methods.
Number of references:26
Main heading:Principal component analysis
Controlled terms:Forecasting - Independent component analysis - Mathematical models - Meats - Regression analysis - Textures
Uncontrolled terms:Dependent variables - Determination coefficients - Independent variables - Instrumental methods - Instrumental texture - Longissimus - Pork - Prediction equations - Prediction model - Principal Components  - Sensory analysis - Sensory attributes - Sensory characteristics - Stepwise regression analysis - Texture characteristics - Texture profile analysis
Classification code:723.4 Artificial Intelligence - 822.3 Food Products - 912.2 Management - 921 Mathematics - 922.2 Mathematical Statistics - 933 Solid State Physics
DOI:10.3969/j.issn.1002-6819.2010.06.062
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 47>
Accession number:20103113111399
Title:Exhaust gas components of large-scale steady combustion fogger
Authors:Zhou, Hongping (1); Zhao, Shuyu (1); Zheng, Jiaqiang (1); Xu, Linyun (1); Gao, Shaoyan (1)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
Corresponding author:Zhou, H.
      (hpzhou@njfu.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:146-151
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 combustion effect of the large-scale steady combustion fogger, reducing the emission of harmful gas of CO, hydroxide and so on, and decreasing the precipitation of the carbon particle, a method of simulating the combustion process and the distribution of the exhausted gases in a combustor was studied to improve the design of the large-scale steady combustion fogger. In the simulation, first, the combustor was simplified to a two-dimensional symmetrical model and the geometric shape of the combustor was established to generate the grid with the Gambit software. Then the combustion and generating process was simulated and calculated with the prePDF program. The mol mass fraction of the combusted product was calculated in the turbulence model and non-premix model of FLUENT. Finally, the chemical component of the exhausted gas was tested by the exhausted gas detector. The research is beneficial for the analysis of the ratio of fuel to air, the product of the exhausted gases, the heat mixture in the exhausted tube and the generation of optimum droplet.
Number of references:15
Main heading:Combustion
Controlled terms:Combustors - Computer simulation - Computer software - Gas fuel analysis - Gases - Numerical analysis - Precipitation (chemical) - Turbulence models
Uncontrolled terms:Carbon particle - Chemical component - Combustion pro-cess - Exhausted gas - Exhausted gases - Fogger - Geometric shape - Mass fraction - Symmetrical models
Classification code:921.6 Numerical Methods - 802.3 Chemical Operations - 802.1 Chemical Plants and Equipment - 801 Chemistry - 723.5 Computer Applications - 931.2 Physical Properties of Gases, Liquids and Solids - 723 Computer Software, Data Handling and Applications - 522 Gas Fuels - 521.2 Combustors - 521.1 Fuel Combustion - 443.1 Atmospheric Properties - 631.1 Fluid Flow, General
DOI:10.3969/j.issn.1002-6819.2010.06.026
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 48>
Accession number:20103113111398
Title:Evaluation of ground speed measurements for agricultural machinery
Authors:Meng, Zhijun (1); Liu, Hui (2); Fu, Weiqiang (1); Huang, Wenqian (1); Wang, Xiu (1)
Author affiliation:(1) National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) Information Engineering College, Capital Normal University, Beijing 100048, China
Corresponding author:Meng, Z.
      (mengzj@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:6
Issue date:June 2010
Publication year:2010
Pages:141-145
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Real-time ground speed measurement is an indispensable function of intelligent equipment for precision agriculture. The objective of this work was to evaluate the performance of different ground speed measurements under farm field conditions. Doppler radar, Hall Effect sensor, RTK-GPS, RTD-GPS and low-cost GPS were adopted for ground speed test on the surface conditions of vegetative cover with wheat, tilled soil, untilled soil and concrete floor. Results showed that speed deviations of RTD-GPS and RTK-GPS measurements were relatively high compared to other speed sensors, and ground speed measurements of low-cost GPS, radar and Hall Effect sensor were in close agreement with average speed under different conditions. While acceleration and deceleration speed test cases indicated that low-cost GPS has relatively higher error and obvious latency compared to other sensors. Based on the field experiments and result analysis, low-cost GPS and Hall Effect sensor can be used as effective method for precision agriculture intelligent equipment ground speed measurement under normal dry farmland.
Number of references:15
Main heading:Radar measurement
Controlled terms:Agricultural machinery - Agriculture - Concrete construction - Cost benefit analysis - Costs - Doppler radar - Gyrators - Hall effect - Magnetic field effects - Measurements  - Radar - Sensors - Soils - Speed - Speed regulators
Uncontrolled terms:Acceleration and deceleration - Average speed - Concrete floor - Dry farmlands - Field conditions - Field experiment - GPS - Ground speed - Hall effect measurement - Hall-effect sensors  - Intelligent equipment - Precision Agriculture - Result analysis - RTK-GPS - Speed sensors - Speed test - Surface conditions - Tilled soils - Untilled soil - Vegetative cover
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 801 Chemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment - 911 Cost and Value Engineering; Industrial Economics - 912.2 Management - 931.1 Mechanics - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 943.2 Mechanical Variables Measurements - 732.2 Control Instrumentation - 405 Construction Equipment and Methods; Surveying - 412 Concrete - 483.1 Soils and Soil Mechanics - 701.1 Electricity: Basic Concepts and Phenomena - 732.1 Control Equipment - 701.2 Magnetism: Basic Concepts and Phenomena - 714.3 Waveguides - 716.2 Radar Systems and Equipment - 731.3 Specific Variables Control - 708.4 Magnetic Materials
DOI:10.3969/j.issn.1002-6819.2010.06.025
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 49>
Accession number:20103113111384
Title:Effects of irrigation upper and lower limits on growth and yield of eggplant under partial rootzone conditions
Authors:Liu, Xianzhao (1); Su, Qing (2); Liu, Delin (3)
Author affiliation:(1) College of Geography and Planning, Ludong University, Yantai 264025, China; (2) Library of Ludong University, Yantai 264025, China; (3) Emergency Management School, Henan Polytechnic University, Jiaozuo 454000, China
Corresponding author:Liu, X.
      (xianzhaoliu@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:52-57
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:The object of this study was to explore the effect of different irrigation upper and lower limits on crop growth, gas exchange and yield, the glass-soil boxes experiment was conducted about two irrigation methods (conventional drip irrigation (CDI), alternate partial root zone drip irrigation (APRDI)). The influence of three levels of irrigation upper and lower limits (CDI, as control, in which soil water content (SWC) in the whole root system ranged from 85%-100% of field capacity (FC); APRDI85-50, in which on one side of the divided root SWC was between 85%-100% of FC and on the other side it was maintained the range of 50%-85% of FC; PRD70-30, in which on one side of the divided root SWC was between 70% to 100% of FC and on the other side it was allowed to vary from 30% to 70%) on growth, gas exchange, yield, and water use ef?ciency in eggplant was studied. Results showed an obvious decrease of leaf water potential up to 19% and 26.4% in APRDI plants compared with CDI. Stomata conductance and transpiration rate in plants with APRDI were significant lower compared to control. However, photosynthetic rate increased by 14.7% in APRDI85-50 plants and photosynthetic rate of APRDI70-30 plants was similar to CDI treatment, thus increased instantaneous transpiration efficiency by 26.1% in APRDI85-50 treatment and 5.1% in APRDI70-30 treatments, respectively, compared to CDI. APRDI treatments triggered root growth, significantly increased root dry weight and root density, and effectively controlled vegetative growth. Compared to CDI treatment, an increase of 43.4% in irrigation water use efficiency was reached in APRDI85-50, yield also increased by 10.8% in APRDI85-50 treatment. However, the irrigation water increased by 29.4% in CDI treatment compared to APRDI85-50 treatment. These results showed that the APRDI85-50 treatment was a feasible irrigation pattern.
Number of references:25
Main heading:Water resources
Controlled terms:Biochemical oxygen demand - Forestry - Photosynthesis - Soil moisture - Subirrigation - Transpiration - Underwater soils - Water content - Water supply
Uncontrolled terms:Crop growth - Drip irrigation - Field capacity - Gas exchange - Growth and yield - In-plants - Irrigation methods - Irrigation patterns - Irrigation water use efficiency - Irrigation waters  - Leaf water potential - Lower limits - Photosynthetic rate - Root density - Root dry weight - Root growth - Root system - Root zone - Soil water content - Transpiration efficiency  - Transpiration rates - Vegetative growth - Water use - Water use efficiency
Classification code:821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 641.2 Heat Transfer - 643 Space Heating, Ventilation and Air Conditioning - 741.1 Light/Optics - 802.2 Chemical Reactions - 821.0 Woodlands and Forestry - 471.1 Oceanography, General - 453 Water Pollution - 452.4 Industrial Wastes Treatment and Disposal - 452.2 Sewage Treatment - 446.1 Water Supply Systems - 444 Water Resources - 461.9 Biology
DOI:10.3969/j.issn.1002-6819.2010.06.010
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 50>
Accession number:20103113111395
Title:Motion analysis and optimization on ejection mechanism of air-suction tray seeder
Authors:Dong, Chunwang (1); Mao, Shuchun (1); Hu, Bin (2); Han, Yingchun (1); Li, Yabing (1); Zhu, Qiaoling (1); Feng, Lu (1)
Author affiliation:(1) Institute of Cotton, The Chinese Academy of Agricultural Sciences, Anyang 455000, China; (2) Machinery and Electricity Engineering College, Shihezi University, Shihezi 832003, China
Corresponding author:Dong, C.
      (dongchunwang@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:124-128
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 new ejection mechanism system was designed to improve the uniformity of seed suspension height in seed plate vibrating for air-suction tray seeder. This new ejection mechanism system consists of four springs, one electromagnet and one seed plate. The seed movement rules were recognized through theoretical analysis and dynamic simulation with respect to seed movement. An advanced seed plate was designed, and the second-generation prototype was completed and tested. The test results indicated the hopping heights of the seeds are uniform, which solved the problem of seed movement and grouping, single seed rate greater than 96%, effectively reduced cavity rate under 2%, and increased adsorption rate above 98%. All performance indices meet the agricultural requirements of precision seeding. This study provides a new idea for the structure design of the vibration system.
Number of references:19
Main heading:Seed
Controlled terms:Adsorption - Agricultural machinery - Computer simulation - Design - Dynamic analysis - Plates (structural components)
Uncontrolled terms:Adsorption rates - Dynamic simulation - Mechanism kinetics - Motion analysis - Performance indices - Seed rate - Structure design - Suspension height - Test results - Vibration systems
Classification code:821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 802.3 Chemical Operations - 902.1 Engineering Graphics - 723.5 Computer Applications - 408.2 Structural Members and Shapes - 408 Structural Design - 422.2 Test Methods
DOI:10.3969/j.issn.1002-6819.2010.06.022
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 51>
Accession number:20103113111433
Title:Dynamic changes of texture profiles of noodle from wheat infected by main boring pests
Authors:Zhang, Yurong (1); Zhou, Xianqing (1); Zhang, Hongyi (1)
Author affiliation:(1) College of Food Science and Technology, Henan University of Technology, Zhengzhou 450052, China; (2) Luohe Stdte Grain Reserve Depot, Luohe 462000, China
Corresponding author:Zhang, Y.
      (yurongzh@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:344-351
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:The texture changes of the cooked noodle from wheat infected by main boring pests such as Sitophilus zeamais Motschulsky, Sitophilus oryzae (linnaeus) and Rhyzopertha dominica (Fabricius) in different damaging levels and their influence were investigated to offer a scientific guidance for the cooking quality evaluation of pest damaged wheat, the safe storage and the quality ensuring of the end products, The commercial wheat harvested in Henan province with two-year storage period were taken as a test sample, and each testing group was infected by each kind of borers in different pest density levels. The protein content and wet gluten content of wheat after a given period of infesting time, and the maximum shearing force, tensile force and extending distance and hardness, springiness, cohesiveness, chewiness and resilience of the cooked noodles were measured. The results showed that the maximum shearing force increased slightly at the beginning of the pest infestation in all different pest density levels, but decreased greatly at the end. The tensile force and the extending distance had a decrease tendency during the whole insect infestation process. The hardness and springiness of the cooked noodles had no great changes at the beginning, then the springiness increased rapidly, but the hardness decreased rapidly. The cohesiveness and chewiness at the end were larger than that at beginning stage. The resilience increased rapidly during the whole insect infestation process. The infection time and population density of the lesser grain borer are also the most important factors which caused the changes of noodle texture parameters by wet gluten content of wheat. Therefore the suitable and effective measures should be timely taken to prevent the enlarging of population density of the lesser grain borer, and keep wheat quality as origin.
Number of references:15
Main heading:Grain (agricultural product)
Controlled terms:Boring - Crops - Hardness - Insect control - Mechanical properties - Population dynamics - Quality control - Shearing - Textures
Uncontrolled terms:Cooking quality - Density levels - Dynamic changes - Effective measures - End-products - Henan Province - Insect infestations - Noodle - Pest infestation - Population densities  - Protein contents - Rhyzopertha dominica - Safe storage - Shearing force - Sitophilus oryzae - Storage periods - Tensile forces - Test samples - Texture profile - Wheat quality
Classification code:821.4 Agricultural Products - 901.4 Impact of Technology on Society - 913.3 Quality Assurance and Control - 931.1 Mechanics - 933 Solid State Physics - 951 Materials Science - 971 Social Sciences - 821.2 Agricultural Chemicals - 421 Strength of Building Materials; Mechanical Properties - 461.7 Health Care - 535.1 Metal Rolling - 604.1 Metal Cutting - 604.2 Machining Operations - 804.1 Organic Compounds - 804.2 Inorganic Compounds
DOI:10.3969/j.issn.1002-6819.2010.06.060
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 52>
Accession number:20103113111421
Title:Liquefaction reaction pathway and mechanism of cornstalk in sub-and super-critical ethanol
Authors:Liu, Huamin (1); Xie, Xin'an (1); Ding, Nianping (1); Liu, Huanbing (3); Huang, Luyi (1)
Author affiliation:(1) College of Food Science, South China Agriculture University, Guangzhou 510641, China; (2) Institute of Bio Energy Technology, South China Agriculture University, Guangzhou 510641, China; (3) South China University of Technology, Guangzhou 510641, China
Corresponding author:Liu, H.
      (liuhuamin5108@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:277-282
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The aim of this paper is to establish the main reaction pathway chart when the cornstalk is liquefied in the sub-and super-critical ethanol, and research the mechanism how the ethanol exert an influence on the products in the reaction. With the principle of lump, five lumps were defined based on the characteristics of the material and products, and they were gas, organic dissolved, heavy oil, volatile organic compounds and residue. According to the study of products yield of a series of liquefaction (a series of calefaction and a series of reaction) and effect of the content of ethanol on products yield, the lumped components of complex reaction system were defined and a reaction network was proposed. The results showed that the main reactant was cornstalk water soluble extracts before the reaction temperature came to 180&deg;C and the main products were gas, volatile organic compounds and a little heavy oil. Then the three main components of cornstalk (cellulose, hemicellulose, lignin) began to react after the reaction had came to 180&deg;C, and the main products were gas, volatile organic compounds, heavy oil and organic dissolved. In the liquefaction process there was reversible reaction between the heavy oil and volatile organic compounds; organic dissolved was mainly transformed into gas in the secondary reaction. In the liquefaction process ethanol not only transferred heat, acted as the solvent of the reaction, but also supplied radicals for the reaction, and these radicals restructured the products of the liquefaction.
Number of references:17
Main heading:Liquefaction
Controlled terms:Cellulose - Dissolution - Ethanol - Gas chromatography - Heavy oil production - Heavy water - Lumped parameter networks - Solvent extraction - Volatile organic compounds
Uncontrolled terms:Complex reaction systems - Corn straw - Corn straws - Heavy oil - Liquefaction process - Lumped components - Main component - Reaction network - Reaction pathways - Reaction temperature  - Reversible reaction - Secondary reactions - Super-critical - Watersoluble
Classification code:815.1.1 Organic Polymers - 811.3 Cellulose, Lignin and Derivatives - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 801 Chemistry - 703.1 Electric Networks - 523 Liquid Fuels - 512.1.2 Development Operations - 511.1 Oil Field Production Operations - 451.1 Air Pollution Sources
DOI:10.3969/j.issn.1002-6819.2010.06.048
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 53>
Accession number:20103113111412
Title:Prediction of apparent viscosity of milk with different volume fraction using electronic tongue
Authors:Wu, Congyuan (1); Wang, Jun (1); Wei, Zhenbo (1); Wang, Yongwei (1); Ye, Sheng (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China; (2) Hangzhou Agricultural Mechanical Management Station, Hangzhou 310001, China
Corresponding author:Wang, J.
      (jwang@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:6
Issue date:June 2010
Publication year:2010
Pages:226-230
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:In order to establish the relationship between response signals of electronic tongue and apparent viscosity of milk, the method of comparing with the effect of MLR, SMLR and PLS model was presented based on one-way analysis of variance (One-Way ANOVA) and principal component analysis (PCA). The results of one-way analysis of variance (One-Way ANOVA) showed that volume fraction had significant effect on apparent viscosities and sensors signal of pure milk; it was also found that principal component analysis (PCA) could be used to distinguish five different volume fractions of pure milk; the results of MLR, SMLR and PLS model showed that the best forecasting effect was the PLS model. Its R was 0.9659, its mean relative error (MRE) was 4.5499%, its RMSEP was 8.4645&times;10^-5, and its principal element was 3. It had been indicated that PLS was an efficient method to predict apparent viscosity of milk with electronic tongue. This method will provide reference for scientific research of apparent viscosity of milk.
Number of references:17
Main heading:Principal component analysis
Controlled terms:Amplifiers (electronic) - Analysis of variance (ANOVA) - Electronic tongues - Forecasting - Oscillators (electronic) - Regression analysis - Titration - Viscometers - Viscosity - Viscosity measurement  - Volume fraction
Uncontrolled terms:Apparent viscosity - Efficient method - Electronic tongue - Mean relative error - Partial least squares - Partial least squares (PLS) - PLS models - Response signal - Scientific researches
Classification code:943.3 Special Purpose Instruments - 931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 922 Statistical Methods - 921 Mathematics - 912.2 Management - 801 Chemistry - 713.2 Oscillators - 713.1 Amplifiers - 641.1 Thermodynamics - 631.1 Fluid Flow, General
DOI:10.3969/j.issn.1002-6819.2010.06.039
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 54>
Accession number:20103113111382
Title:Design and applicable evaluation of instrument for determining soil moisture profile
Authors:Fu, Lei (1); Sun, Yurui (1)
Author affiliation:(1) Research Center for Precision Agriculture, China Agriculture University, Beijing 100083, China
Corresponding author:Sun, Y.
      (pal@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:6
Issue date:June 2010
Publication year:2010
Pages:42-46
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:For monitoring soil moisture profile in relation to the root-zones of various crops, an instrument, which could measure soil moisture over a range depth of 0-200 cm, was developed. The principle of soil moisture sensor was based on the fringe-effect of capacitor and the dielectric prosperity of medium surrounding electrodes. When moved up or down in an access tube embedded into soil, the designed probe could sense the moisture profile real-time. The depth transducer consisted of a sensor array of Hall-magnetism components, and a PDA was employed as data-logger. Furthermore, this paper presented the analytical approach on the measurement method, and proposed the experimental method for evaluating the feasibility in the field. Results showed that the system performance index agreed reasonably well with the practical application and it was worthy for recommendation.
Number of references:13
Main heading:Moisture control
Controlled terms:Calibration - Dielectric materials - Moisture determination - Sensor arrays - Soil moisture - Soil surveys
Uncontrolled terms:Analytical approach - Datalogger - Evaluation - Experimental methods - Measurement methods - Moisture profiles - Performance indices - Profile - Soil moisture profiles - Soil moisture sensors
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 902.2 Codes and Standards - 944.2 Moisture Measurements - 732 Control Devices - 716 Telecommunication; Radar, Radio and Television - 708.1 Dielectric Materials - 483.1 Soils and Soil Mechanics - 406.2 Roads and Streets - 731.3 Specific Variables Control
DOI:10.3969/j.issn.1002-6819.2010.06.008
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 55>
Accession number:20103113111418
Title:Life cycle assessment of corn straw pellet fuel
Authors:Zhu, Jinling (1); Wang, Zhiwei (1); Shi, Xinguang (1); Yang, Shuhua (1); He, Xiaofeng (1); Lei, Tingzhou (2)
Author affiliation:(1) Energy Research Institute Company Limited, Henan Academy of Sciences, Zhengzhou 450008, China; (2) Key Biomass Energy Laboratory, Henan Province, Zhengzhou 450008, China; (3) Henan Academy of Sciences, Zhengzhou 450002, China
Corresponding author:Wang, Z.
      (bioenergy66@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:262-266
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 quantitatively explain the potential of energy saving and greenhouse gas emissions reduction of straw-based pellet fuel, system of corn straw to pellet fuel was taken as research object from the view of energy consumption and environmental emission. The unit processes of corn straw growth, transportation, compression, corn straw pellet fuel transportation and combustion were analyzed. The analysis model was built about life cycle energy consumption and environmental emission of corn straw pellet fuel. Energy consumption and environmental emission were evaluated for a 5000 t/a corn straw pellet fuel plant. The results showed that energy was consumed in corn straw transportation, compression, pellet fuel transportation, et al. Energy consumption using in corn straw compression was the most of it. The CO<inf>2</inf> amount settled by corn straw growing was about 96.6% of CO<inf>2</inf> emission from the life cycle assessment, it made a great greenhouse emission reduction. According to life cycle assessment of corn straw pellet fuel, straw pellet fuel had a bigger advantage as compare with fossil fuel. Those results provided foundational data for utilization of straw pellet fuel. It is important to reduce electricity consumption of straw compression for improving utilization level of straw pellet fuel.
Number of references:22
Main heading:Pelletizing
Controlled terms:Emission control - Energy utilization - Fossil fuels - Gas emissions - Global warming - Greenhouse gases - Greenhouses
Uncontrolled terms:Analysis models - Corn straws - Electricity-consumption - Energy consumption - Energy saving - Environmental emission - Environmental emissions - Fuel transportations - Greenhouse emissions - Greenhouse gas emissions reductions  - Life-cycle assessments - Pellet fuel - Research object - Unit process
Classification code:821.6 Farm Buildings and Other Structures - 804.1 Organic Compounds - 802.3 Chemical Operations - 533.1 Ore Treatment - 525.3 Energy Utilization - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels - 451.2 Air Pollution Control - 451.1 Air Pollution Sources - 451 Air Pollution - 443.1 Atmospheric Properties - 402.1 Industrial and Agricultural Buildings
DOI:10.3969/j.issn.1002-6819.2010.06.045
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 56>
Accession number:20103113111423
Title:Treatment of odor gas containing hydrogen sulfide by multilayer biofilter
Authors:Li, Shunyi (1); Zhang, Huaxin (1); Wang, Yan (1); Ma, Hongyan (1); Li, Wei (1)
Author affiliation:(1) School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China
Corresponding author:Li, S.
      (lsy76@zzu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:287-291
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 of high pressure drop and low purifying efficiency existing in the single layer biofilter, using corncob as filler, in contrast to the single layer biofilter, multilayer biofilter used in treating H<inf>2</inf>S-contaminated gas streams was investigated. The suitable technological conditions and removal kinetics have been studied in this paper. The results showed that the multilayer biofilter had a higher removal rate of H<inf>2</inf>S than that of the single layer biofilter. The removal efficiency of H<inf>2</inf>S was more than 90% when the inlet hydrogen sulfide was lower than 140 mg/m³. When the inlet volumetric loading rate of H<inf>2</inf>S below 42.2 g/(m³&middotd), the bottom layer which was 200 mm thick removed more than 95% of the total removal rate. The biofilter worked well as the moisture content ranged from 55% to 70%. The removal kinetics were researched based on the Michaelis-Menten model, two kinetic parameters were K<inf>sp</inf> with a value of 12.4 mg/m³ and V<inf>m</inf> with a value of 909 g/(m³&middotd). So the multilayer biofilter was better than the single layer biofilter in treating H<inf>2</inf>S-contaminated gas streams. It was a kind of biofilter with longer residence time, low pressure drop, high purifying efficiency, and air movement distributed more uniformly. The removal efficiency of H<inf>2</inf>S was more than 90% during three months operation. The experiment provide some theoretical guidance for further research and engineering application.
Number of references:18
Main heading:Biofilters
Controlled terms:Biofiltration - Hydrogen - Hydrogen sulfide - Multilayers - Pressure drop - Removal - River pollution - Sulfur determination
Uncontrolled terms:Air movement - Bottom layers - Corncob - Engineering applications - Gas streams - High pressure - Low pressure drop - Michaelis-Menten model - Moisture contents - Removal efficiencies  - Removal kinetics - Removal rate - Residence time - Single layer - Technological conditions - Total removal rates - Volumetric loading rates
Classification code:933.1 Crystalline Solids - 931.1 Mechanics - 813.2 Coating Materials - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 801 Chemistry - 631.1 Fluid Flow, General - 461.8 Biotechnology - 453 Water Pollution - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 451.2 Air Pollution Control - 445.1 Water Treatment Techniques
DOI:10.3969/j.issn.1002-6819.2010.06.050
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 57>
Accession number:20103113111410
Title:Test of wireless sensor network radio frequency signal propagation based on different node deployments in citrus orchards
Authors:Wen, Tao (1); Hong, Tiansheng (1); Li, Zhen (1); Huang, Sen (1); Li, Jianian (1); Ye, Zhijie (1)
Author affiliation:(1) National Citrus Industry Technology Research System Machinery Laboratory, College of Engineering, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Hong, T.
      (tshong@scau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:211-215
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, for configuring WSN system architecture and node deployment in citrus orchards, relationship between wireless sensor network (WSN) radio frequency (RF) signal strength attenuation and the corresponding influential factors was studied based on radio wave propagation characteristics. In this study, a carrier frequency being 433MHz was selected and the attenuation of radio wave in citrus orchards was analyzed based on continuous radio waves in the circumstance of different combinations of impact factors including plant depths, antenna heights, communication distances etc. Additionally, a WSN RF signal strength linear model objectively feasible in citrus orchards was built, with the related determination coefficients for fitting-curves ranging from 0.797 to 0.980, in order to ensure the possibility of predicting the tendency of receive signal strength attenuation with the existence of two factors, RF propagation distance and environmental propagation factor. As a consequence, a distributive chart of the best antenna height indicating the combination of different plant depths, antenna heights and communication distance variations was obtained, possibly providing good guidance for WSN system configuration and node deployment in citrus orchards.
Number of references:16
Main heading:Radio frequency amplifiers
Controlled terms:Antennas - Curve fitting - Orchards - Radio - Radio waves - Sensor networks - Signal analysis - Wave propagation - Wireless sensor networks
Uncontrolled terms:Carrier frequency - Citrus orchards - Communication distance - Determination coefficients - Impact factor - Influential factors - Linear model - Node deployment - Propagation factor - Radiofrequency signals  - Radiowave propagation - RF propagation - RF signal strength - Signal strengths - System architectures - System configurations
Classification code:922.2 Mathematical Statistics - 731.1 Control Systems - 732 Control Devices - 751.1 Acoustic Waves - 821.3 Agricultural Methods - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921.6 Numerical Methods - 722.4 Digital Computers and Systems - 716.3 Radio Systems and Equipment - 716.1 Information Theory and Signal Processing - 716 Telecommunication; Radar, Radio and Television - 713.1 Amplifiers - 711 Electromagnetic Waves - 722.3 Data Communication, Equipment and Techniques
DOI:10.3969/j.issn.1002-6819.2010.06.037
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 58>
Accession number:20103113111404
Title:Spatializing regional fertilizer input based on MODIS NDVI time series
Authors:Sun, Danfeng (1); Wang, Ya (1); Li, Hong (2); Zhang, Weiwei (1); Zhou, Liandi (2)
Author affiliation:(1) Department of Land Resources Management, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China; (2) Institute of Agricultural System Comprehensive Development, Beijing Academy of Agriculture and Forest Science, Beijing 100097, China
Corresponding author:Sun, D.
      (sundf@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:6
Issue date:June 2010
Publication year:2010
Pages:175-180
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Regional agricultural ecological system faces more and more environmental pressure with bigger fertilizer input and higher land and water resources use efficiency. In order to assess the environmental risk of fertilizer overuse, the spatial data of fertilizer input is necessary. This paper firstly analyzed the structures of land primary productivity and the major limiting factors in theory, then adopted principal component analysis to quantify the spatial relationship between the 8-day composite MODIS NDVI time series of different cropping patterns and regional land natural quality, also its relationship with fertilizer input, finally designed the spatializing method of the regional statistical fertilizer input. The results showed that the first principal component of the 8-day composite MODIS NDVI time series under different cropping patterns was closely correlated with land natural quality, and their second principal component significantly related to chemical fertilizers input. Therefore, this paper spatialized the community-level statistical chemical fertilizer input in proportion with the second principal component, and concluded that the principal component analysis of the 8-day composite MODIS NDVI time series under different cropping patterns could discern the productivity disparity from land quality and human beings inputs such as fertilizer input, thus the rationality and feasibility of the spatializing method were clarified.
Number of references:17
Main heading:Principal component analysis
Controlled terms:Chemical analysis - Fertilizers - Productivity - Radiometers - Time series - Time series analysis - Water resources
Uncontrolled terms:Chemical fertilizers - Cropping patterns - Ecological systems - Environmental pressures - Environmental risks - First principal components - Human being - Land quality - Limiting factors - MODIS NDVI time series  - NDVI time series - Primary productivity - Principal Components - Spatial data - Spatial relationships
Classification code:944.7 Radiation Measuring Instruments - 922.2 Mathematical Statistics - 913.1 Production Engineering - 821.2 Agricultural Chemicals - 804 Chemical Products Generally - 801 Chemistry - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.06.031
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 59>
Accession number:20103113111396
Title:Numerical simulation of pressure fluctuation in double-blade pump
Authors:Zhu, Rongsheng (1); Hu, Ziqiang (1); Fu, Qiang (1)
Author affiliation:(1) Technology and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China; (2) Technical Center, Jiangsu Guoquan Pumps Company Limited, Zhenjiang 212013, China
Corresponding author:Hu, Z.
      (huziqiangkk@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:129-134
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to analyze the characteristics and the major influence factors of the pressure fluctuation in the double-blade pump, the RNG &Kappa;-&Epsilon; turbulence model was applied and the fluid field in the impeller, volute casing and the inlet extended section of the impeller under three operating conditions was computed. Based on the analysis of simulation data, the time-domain spectrums and frequency spectrums of pressure fluctuation were obtained. It showed that: the pressure wave was a periodic sine one in the double-blade pump and the period at inlet was double than other parts. The pressure fluctuation was effected by the rotor-stator coupling. The dominant frequency of the inlet pressure fluctuation of impeller was approximately equal to the impeller passing frequency, and that in the impeller-volute casing coupling part, and the outlet of volute casing was equal to the product of impeller rotational frequency and number of blade. The dominant frequency at the same monitoring point was constant but with different amplitude in different flow rate, high amplitude in low flow rate and minimum in design rate. In the impeller-volute casing coupling, the pressure fluctuation will start to decline along the direction of impeller rotation from the tongue. The conclusion will provide an essential guide to master the principles and characters of the pressure fluctuation in the double-blade pump.
Number of references:15
Main heading:Time domain analysis
Controlled terms:Computer simulation - Frequency domain analysis - Numerical analysis - Pumps - Stators - Turbulence models
Uncontrolled terms:Dominant frequency - Double-blade - Fluid field - Frequency spectra - High amplitudes - Impeller rotation - Influence factors - Inlet pressures - Low flow - Monitoring points  - Numerical simulation - Operating condition - Pressure fluctuation - Pressure waves - Rotational frequency - Rotor-stator coupling - Simulation data - Time domain - Volute casings
Classification code:921.3 Mathematical Transformations - 921 Mathematics - 731.1 Control Systems - 723.5 Computer Applications - 921.6 Numerical Methods - 705.1 Electric Machinery, General - 631.1 Fluid Flow, General - 618.2 Pumps - 443.1 Atmospheric Properties - 703.1.1 Electric Network Analysis
DOI:10.3969/j.issn.1002-6819.2010.06.023
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 60>
Accession number:20103113111415
Title:Optimization of process parameters of biodiesel production from rapeseed oil with alkaline catalyzed transesterification method
Authors:Liu, Ronghou (1); Cao, Weixing (1); Huang, Caixia (1)
Author affiliation:(1) Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author:Liu, R.
      (liurhou@sjtu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:245-250
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 get the best conditions of reaction, based on one-factor tests, response surface methodology was applied to optimize the process parameters of biodiesel production from rapeseed oil with alkaline catalyzed transesterification method. The results showed that, regression equation of the variation of rapeseed oil conversion rate during transesterification reaction fitted very well. The optimal parameters were determined as follows, molar ratio of methanol to rapeseed oil, catalyst dosage, reaction time and reaction temperature were 6.12:1, 0.9%, 40 min and 57.74&deg;C respectively. Under the optimal conditions, verification tests showed that the conversion rate of rapeseed oil reached 97.43%, and the error was 0.4%, less than 5% compared with the predicted value. GC/MS analysis showed that the content of fatty acid methyl ester in biodiesel was 99.54%. Thus, the optimized conditions obtained using response surface methodology is reliable and the quality of the biodiesel was very good.
Number of references:15
Main heading:Biodiesel
Controlled terms:Esters - Fatty acids - Methanol - Optimization - Process control - Surface properties - Transesterification - Vegetable oils
Uncontrolled terms:Biodiesel production - Conversion rates - Fatty acid methyl ester - GC/MS analysis - Molar ratio - One-factor - Optimal conditions - Optimal parameter - Optimization of process parameters - Optimized conditions  - Process optimization - Process parameters - Rapeseed oil - Reaction temperature - Reaction time - Regression equation - Response Surface Methodology - Transesterification reaction - Verification tests
Classification code:951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 921.5 Optimization Techniques - 822.3 Food Products - 804.1 Organic Compounds - 731 Automatic Control Principles and Applications - 523 Liquid Fuels
DOI:10.3969/j.issn.1002-6819.2010.06.042
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 61>
Accession number:20103113111406
Title:Soft-sensing model on vibration cutting resistance from rock and soil based on improved fuzzy neural networks theory
Authors:Zhang, Haiying (1); Liao, Jianyong (1)
Author affiliation:(1) College of Architecture and City Planning, Hunan City University, Yiyang 413000, China
Corresponding author:Zhang, H.
      (zhy1025888@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 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 save energy and reduce cutting resistance in the process of vibratory excavating for rock and soil, the impacts of vibration frequency, amplitude and inserting velocity on vibratory excavating resistance from rock and soil were analyzed. Based on the method for constructing a fuzzy set by using clear sets, a soft-sensing model on vibration cutting resistance from rock and soil was brought up by using of the vibration frequency, amplitude and inserting velocity as accessorial parameters. The application results revealed that the soft sensing model was of much high modeling precision and generalization capability and its most train relative error was about 0.67%, its least test relative error was about -0.4%. And the soft-sensing model is very useful for measurement of vibration cutting resistance from rock and soil quickly and precisely.
Number of references:15
Main heading:Vibration analysis
Controlled terms:Fuzzy neural networks - Fuzzy sets - Geologic models - Measurements - Rocks - Sensors - Soils
Uncontrolled terms:Clear set - Cutting resistance - Generalization capability - Modeling precision - Relative errors - Save energy - Soft-sensing model - Soft-sensing technique - Vibration cutting - Vibration frequency
Classification code:943.2 Mechanical Variables Measurements - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 801 Chemistry - 732.2 Control Instrumentation - 723.4 Artificial Intelligence - 483.1 Soils and Soil Mechanics - 481.1 Geology - 751.2 Acoustic Properties of Materials
DOI:10.3969/j.issn.1002-6819.2010.06.033
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 62>
Accession number:20103113111428
Title:Effects of spatial grain size on landscape pattern of land use in Three Gorges Reservoir Area in 30 years
Authors:Cao, Yingui (1); Zhou, Wei (1); Wang, Jing (2); Yuan, Chun (1)
Author affiliation:(1) School of Land Science and Technology, China University of Geosciences, Beijing 100083, China; (2) Land Key Laboratory of China Land Survey and Plan Institute, Beijing 100035, China
Corresponding author:Cao, Y.
      (caoyingui1982@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:315-321
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 is purpose to measure landscape indexes traits with changes of grain sizes, and summarize differences of landscape traits in different grain sizes. In this paper, five remote sensing images of Three Gorges Reservoir Area in 1975, 1987, 1995, 2000 and 2005 were taken as data for present study. The images were interpreted into draws of landscape pattern. In the ArcView3.3 environment, the vector draws were transformed into shatter draws according to different spatial grain size. In the same time, landscape indexes were chosen and the effects between spatial grain size and landscape indexes were measured at the scale of pattern and landscape. Then the correlation differences between landscape indexes and spatial grain size were analyzed with the method of correlation analysis. The results showed that, the traits of changes of landscape patterns were proved in 30 years. The effective sensitiveness between different landscape indexes and spatial grain size was different, such as patch density (PD), effective mesh size (MESH), standardized trait index (NSLI), aggregation index (AI), and same landscape pattern in the process of measuring was taken on different change rules, such as cultivated land (slope&lt;25&deg;), forestry land, grassland, urban constructive land. There were some turning points in the changes of effect, especially at 400 m. At the scale of landscape, patch density and land shape index were largely impacted by the spatial grain size. The correlation between the same index and grain shows highly consistency at the scale of pattern and time. Above all, this research can reflect the change rules of landscape indexes in different spatial grain size.
Number of references:19
Main heading:Grain size and shape
Controlled terms:Agriculture - Image reconstruction - Land use - Planning - Regional planning - Remote sensing
Uncontrolled terms:Aggregation index - Correlation analysis - Cultivated lands - Grain size - Landscape pattern - Mesh size - Patch densities - Remote sensing images - Reservoirs - Shape indices  - Three gorges reservoir area - Turning points
Classification code:933.1.1 Crystal Lattice - 912.2 Management - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 801.4 Physical Chemistry - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 723.2 Data Processing and Image Processing - 531.2 Metallography - 442.2 Land Reclamation - 403.2 Regional Planning and Development - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.06.055
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 63>
Accession number:20103113111424
Title:Effects of ameliorants addition on Cd contents and yield of crop in Cd-rich reclaiming substrates
Authors:Zhao, Jingmei (1); Feng, Yongjun (1); Hao, Guixi (1); Fan, Rui (1)
Author affiliation:(1) College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China
Corresponding author:Feng, Y.
      (fyj@sdau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:6
Issue date:June 2010
Publication year:2010
Pages:292-295
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, there were two substrates, one was fly ash plus vinasse substrate (substrate I), and the other was fly ash plus sewage sludge substrate (substrate II). The effects of using citric acid and white lime as ameliorants addition on the growth of kidney beans, cowpeas and potatoes planted on the two substrates were studied to choose the crops which could be securely planted. The results showed that white lime could significantly rise the emergence ratio, while citric acid had little effects on emergence ratio. The yield of kidney beans and cowpeas in substrate I and potatoes in both substrates could be significantly increased by white lime; citric acid significantly decreased the yield of kidney beans and cowpeas in substrate I, but had no significant effect on product of potatoes in both substrates. White lime could significantly decrease the content of Cd in both kidney beans and potatoes, while citric acid could significantly increase the content of Cd in kidney beans. Kidney beans, cowpeas and potatoes can be securely planted in fly ash plus vinasse substrate and only potatoes can be securely planted in fly ash plus sewage sludge substrate.
Number of references:13
Main heading:Substrates
Controlled terms:Acids - Citric acid - Crops - Fly ash - Lime - Sewage sludge
Uncontrolled terms:Cd - Kidney beans - Vinasses - White lime
Classification code:801 Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 822 Food Technology - 804.1 Organic Compounds - 813.1 Coating Techniques - 821.4 Agricultural Products - 804.2 Inorganic Compounds - 714.2 Semiconductor Devices and Integrated Circuits - 712.1 Semiconducting Materials - 412 Concrete - 451.1 Air Pollution Sources - 452.2 Sewage Treatment - 453.1 Water Pollution Sources - 461 Bioengineering and Biology - 521.1 Fuel Combustion
DOI:10.3969/j.issn.1002-6819.2010.06.051
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 64>
Accession number:20103113111438
Title:Heating rate and electrical conductivity of hog short rip during ohmic heating
Authors:Li, Xiuzhi (1); Wang, Ranran (1); Song, Zhanhua (1); Zhang, Yemin (1); Li, Fade (1)
Author affiliation:(1) Shandong Agricultural University, Tai'an 271018, China
Corresponding author:Li, F.
      (li_fade@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:6
Issue date:June 2010
Publication year:2010
Pages:375-379
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to develop an ohmic heating device for processing raw meat material such as short rip, a single short rip of hog was ohmically heated with an immersion ohmic heating device in this paper. The samples were submerged in the different concentrations of NaCl solution and tap water, respectively, at 1 500 V/m of the electrical field strength. The results showed that when the samples were submerged in tap water and 0.01-0.03 mol/L NaCl solution, the heating rates of each part of the samples were higher than that of the solution, regardless of the orientation of the ribs. But when the concentration of NaCl solution was 0.05 mol/L, only the heating rate of the muscle of sample was slightly higher than that of the solution. The results also showed that the heating rate of each part of the sample with the long axis parallel to the electrical field was higher than that of the corresponding part of the sample with the long axis vertical to the electrical field, and the electrical conductivity of the mixture (the sample and the solution) was increased linearly with temperature. Therefore, in the premise that the average heating rates of the samples were higher than that of the solution, the optimum process conditions were as follows: the long axis of the samples was parallel to the electric field, and the concentration of NaCl solution was no more than 0.03 mol/L. This will provide basis for the ohmic heating technology being used in ribs processing.
Number of references:16
Main heading:Heating
Controlled terms:Electric conductivity measurement - Electric conductivity of solids - Electric fields - Heating equipment - Heating rate - Liquids - Mixtures - Sodium chloride - Temperature distribution - Thermoanalysis
Uncontrolled terms:Concentration of - Electrical conductivity - Electrical field - Electrical field strength - Long axis - NaCl solution - Ohmic heating - Ohmic heating technology - Optimum process conditions - Short rip of hog  - Solid-liquid mixture - Solid-liquid mixtures - Tap water
Classification code:942.2 Electric Variables Measurements - 931.2 Physical Properties of Gases, Liquids and Solids - 804.2 Inorganic Compounds - 802.3 Chemical Operations - 801 Chemistry - 701.1 Electricity: Basic Concepts and Phenomena - 643.2 Space Heating Equipment and Components - 643.1 Space Heating - 642.2 Industrial Furnaces and Components - 642.1 Process Heating - 641.2 Heat Transfer - 641.1 Thermodynamics - 482.2 Minerals
DOI:10.3969/j.issn.1002-6819.2010.06.065
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 65>
Accession number:20103113111413
Title:One-dimensional Finite difference model and numerical simulation for heat transfer of wall in Chinese solar greenhouse
Authors:Ma, Chengwei (1); Lu, Hai (1); Li, Rui (1); Qu, Mei (1)
Author affiliation:(1) Key Laboratory of Agricultural Engineering in Structure and Environment, China Agriculture University, Beijing 100083, China
Corresponding author:Ma, C.
      (macwbs@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:6
Issue date:June 2010
Publication year:2010
Pages:231-237
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A one-dimensional difference model for unsteady heat transfer of wall in solar greenhouse was established to predict and evaluate the thermal performance of wall in solar greenhouse. On the basis of meteorological data and the change patterns, the methods of calculation for solar radiation on the surface of wall as the inner heat source of border node, and for inside and outside air temperature as boundary conditions in form of Fourier series were developed. A method named "training method" was created to determine the initial condition of wall, based on the effect of periodic environmental conditions. Forward elimination and backward substitution was presented to solve the system of difference equation efficiently. A method of calculation for heat release of wall in solar greenhouse was developed, and the corresponding computer program called RGWSQCR was finished. With the simulation program of heat transfer process of wall, the information about heat flux and temperature of any point in the wall at any time could be found. Then such information would be provided to analyze the thermal characteristics of wall in solar greenhouse comprehensively.
Number of references:20
Main heading:Mathematical models
Controlled terms:Difference equations - Fourier analysis - Fourier series - Greenhouses - Harmonic analysis - Heat exchangers - Heat transfer - Meteorology - One dimensional - Solar heating  - Sun
Uncontrolled terms:Numerical simulation - Solar greenhouse - Training method - Training methods - Walls, heat transfer
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 751 Acoustics, Noise. Sound - 752 Sound Devices, Equipment and Systems - 821.6 Farm Buildings and Other Structures - 921 Mathematics - 921.3 Mathematical Transformations - 921.6 Numerical Methods - 657.1 Solar Energy and Phenomena - 402.1 Industrial and Agricultural Buildings - 443 Meteorology - 482.1 Mineralogical Techniques - 616.1 Heat Exchange Equipment and Components - 641.2 Heat Transfer - 642.1 Process Heating - 643.1 Space Heating
DOI:10.3969/j.issn.1002-6819.2010.06.040
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 66>
Accession number:20103113111393
Title:Effect of clamping cotton-seed precision dibbler operating vibration on seeding
Authors:Wang, Jikui (1); Guo, Kangquan (1); L&#252;, Xinmin (1); Ma, Benxue (2); Qi, Chusheng (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, 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:6
Issue date:June 2010
Publication year:2010
Pages:114-118
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 adaptability of clamping cotton seed precision dibbler to earth surface, a conclusion has been obtained that there were weightlessness and hypergravity through analyzing the main forms and values of the vibration of operating dibbler. The operation vibrations of the dibbler had great influence on seed clamping reliability. The seeds in the clamping port of the seeding devices could be clamped reliably in the condition of hypergravity, while they were unstable under weightlessness condition for the weight might rotate reversely, and seeds in the clamping port of the seeding devices would lose clamping power. The mechanism of the dibbler seeding devices was improved according to the research results. Experiment results showed that the rate of empty seed of improved dibbler declined from 9.3 percent to 2.6 percent. Therefore, the seeding properties of the dibbler were well raised, the affects of vibration on the dibbler were reduced, and the working reliability of the dibbler was obviously enhanced.
Number of references:17
Main heading:Vibration analysis
Controlled terms:Agricultural machinery - Cotton - Seed - Weightlessness
Uncontrolled terms:Clamping - Clamping power - Earth surface - Hypergravity - Research results - Seeding properties
Classification code:943.2 Mechanical Variables Measurements - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 819.1 Natural Fibers - 751.2 Acoustic Properties of Materials - 656.1 Space Flight - 461.4 Ergonomics and Human Factors Engineering
DOI:10.3969/j.issn.1002-6819.2010.06.020
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.