<RECORD 1>
Accession number:20102713062808
Title:Security evaluation and measures of land arrangements in Sichuan seismic region
Authors:Xue, Yongsen (1); Yun, Wenju (2); Zhang, Fengrong (1)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, China; (2) Land Arrangements Center of Land Resource Bureau, Beijing 100035, China
Corresponding author:Yun, W.
      (yunwenju@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:5
Issue date:May 2010
Publication year:2010
Pages:288-294
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:Earthquake and secondary geological disasters damaged 129500 hm² farming land, 114500 hm² construction land and 22701 villages in Wenchuan County, Sichuan Province, thus reconstruction of land arrangements after earthquake is very arduous. Land arrangements are the effective measures for implementation of reconstruction after disasters, and the security evaluation of land arrangements are the foundation of rearrangement and reuse of land after disasters. In this paper, factors of security evaluation of reconstructed the land arrangements of seismic region post-disaster were analyzed. Distance away from the earthquake fault zone, type of rock soil body, angle of terrain slope and relative high altitude were selected for influence factors of land arrangements security evaluating. According to the possibility of the disasters happen, the influence factors were divided into different danger ranks. Taking single-factor superposition method evaluation, the Sichuan seismic region was divided into high-risk areas, warning areas and general warning areas. The land arrangements high-risk danger area, in which the distance was less than 200 m away from the Longmen mountain earthquake fault zone, the relative high altitude was more than 500 m, and the terrain slope was more than 25&deg;, mainly constitutes of rock mass stave or soft with hard interaction and so on easy slippery gneiss. The land arrangements warning area is within the earthquake fault zone 200-500 m, the relative high altitude was 200-500 m, the terrain slope was 15&deg;-25&deg;, mainly constitutes of the diluvial level or the soft with hard interaction and so on easy slippery gneiss. The land arrangements general warning area, in which was 500 m apart from the earthquake fault zone, the terrain slope was less than 15&deg;, and the relative high altitude was less than 200 m. This paper put forward the objective and measures of land consolidation post-disaster.
Number of references:21
Main heading:Earthquakes
Controlled terms:Disasters - Land use - Landforms - Planning - Regional planning - Seismic prospecting
Uncontrolled terms:Construction land - Earthquake fault - Effective measures - Geological disaster - High altitude - High-risk areas - Influence factors - Longmen Mountain - Rock mass - Security evaluation  - Seismic regions - Sichuan - Sichuan province - Soil body - Superposition method - Terrain slope
Classification code:914.2 Fires and Fire Protection - 484.1 Earthquake Measurements and Analysis - 501.1 Exploration and Prospecting Methods - 502.1 Mine and Quarry Operations - 512 Petroleum and Related Deposits - 912.2 Management - 914.1 Accidents and Accident Prevention - 484 Seismology - 481.1 Geology - 454.2 Environmental Impact and Protection - 442.2 Land Reclamation - 403.2 Regional Planning and Development - 403 Urban and Regional Planning and Development - 481.4 Geophysical Prospecting
DOI:10.3969/j.issn.1002-6819.2010.05.049
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 2>
Accession number:20102713062797
Title:Experimental study on combustion and emission characteristics of biomass pellets
Authors:Luo, Juan (1); Hou, Shulin (1); Zhao, Lixin (2); Meng, Haibo (2); Tian, Yishui (2)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) Chinese Academy of Agricultural Engineering, Beijing 100125, China
Corresponding author:Tian, Y.
      (yishuit@yahoo.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:220-226
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To study the combustion and emission characteristics of biomass pellets, eight kinds of typical pellets were chosen to be investigated with an imported biomass pellet fuel burners using as experimental device in this study. The results indicated that the more the volatile matter and moisture in the biomass pellets, the shorter the igniting time. The pollutants such as SO<inf>2</inf>, NO<inf>x</inf> and so on were far below the national standard. But there were some problems existed for several pellets, such as the ash content was too large, the slagging was too seriously. For most kinds of pellets, the higher the content of chemical elements like Si and the alkali metal group in biomass pellets, the easier to form slag; and the higher content of alkaline earth metal group, the harder to form slag. For example, the content of Si in corn straw was 27.70%, and the clinkering rate of bottom ash was 48.84%. However, the content of Si in corn straw was only 9.76% with no slagging. When adding additives, the clinkering rate of bottom ash of corn-straw-pellets fell 22.77%. So it could provide the basis data for improving and designing the burning equipments of biomass pellet that adapt to the situation in China.
Number of references:17
Main heading:Pelletizing
Controlled terms:Alkali metals - Alkaline earth metals - Alkalinity - Ash handling - Ashes - Biomass - Chemical elements - Combustion - Fuel burners - Fuels  - Light metals - Ore pellets - Silicon - Slags
Uncontrolled terms:Ash contents - Biomass pellet - Biomass pellets - Bottom ash - Corn straws - Emission characteristics - Experimental studies - Igniting time - National standard - Volatile matters
Classification code:691.1 Materials Handling Equipment - 614.2 Steam Power Plant Equipment and Operation - 549.3 Others, including Bismuth, Boron, Cadmium, Cobalt, Mercury, Niobium, Selenium, Silicon, Tellurium and Zirconium - 549.2 Alkaline Earth Metals - 549.1 Alkali Metals - 545.3 Steel - 542.3 Titanium and Alloys - 712.1.1 Single Element Semiconducting Materials - 821.5 Agricultural Wastes - 821.2 Agricultural Chemicals - 805.1.1 Biochemical Engineering - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 801.1 Chemistry, General - 542.2 Magnesium and Alloys - 521.3 Fuel Burners - 521.1 Fuel Combustion - 452.4 Industrial Wastes Treatment and Disposal - 452.3 Industrial Wastes - 413 Insulating Materials - 412 Concrete - 406 Highway Engineering - 522 Gas Fuels - 542.1 Beryllium and Alloys - 541.1 Aluminum - 533.1 Ore Treatment - 532.2 Blast Furnaces - 525.1 Energy Resources and Renewable Energy Issues - 524 Solid Fuels - 523 Liquid Fuels
DOI:10.3969/j.issn.1002-6819.2010.05.038
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 3>
Accession number:20102713062813
Title:Method of measuring ecological and social benefits of cultivated land and its application
Authors:Niu, Haipeng (1); Zhang, Anlu (2)
Author affiliation:(1) Key Laboratory of Mine Spatial Information Technologies of State Bureau of Surveying and Mapping, Henan Polytechnic University, Jiaozuo 454000, China; (2) College of Land Management, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Niu, H.
      (niuhaipeng@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:316-323
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The measurement of the ecological and social benefits of cultivated land is taken as the basis for the standard of cultivated land protection economic compensation. Firstly, this paper reconstructs cultivated land utilization benefit systems based on ecosystem services, and analyzes the externalities of ecological and social benefits. Secondly, the theoretical value of ecological and social benefits is calculated by equivalent weight factor method and replacement cost method based on the data of 2000, 2002, 2004 and 2006. Finally, the actual value is measured based on the development stage coefficient. The results are as follows: The theoretical value of ecological and social benefits per hectare is 10699.3 RMB in 2000, 10830.9 RMB in 2002, 14186.2 RMB in 2004 and 15542.3 RMB in 2006, respectively. This indicates that the ecological and social benefits keep an increasing trend with the enhancement of scarce of cultivated land. The proportion of social benefits increased from 42.99 % in 2000 to 48.41%t in 2006, and the increasing trend of food safety benefit is more remarkable. This indicates that the food safety benefit and social security benefit are getting more and more important, and the compensation system without taking the social benefits into consideration is unilateral. With the improvement of the cultivated land grade, the actual value of ecological and social benefits increases form 4 653.2 RMB to 9333.6 RMB per hectare. This shows that the actual value is closely related to cultivated land quality and willingness to pay. This study may provide the theoretical basis and technology support for cultivated land protection compensation system.
Number of references:21
Main heading:Land use
Controlled terms:Economic analysis - Ecosystems - Health - Standards
Uncontrolled terms:Ecological and social benefits - Economic compensation - Externalities - Land utilization - Social benefits
Classification code:914.3 Industrial Hygiene - 911.2 Industrial Economics - 902.2 Codes and Standards - 461.6 Medicine and Pharmacology - 454.3 Ecology and Ecosystems - 442.2 Land Reclamation - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.05.054
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 4>
Accession number:20102713062771
Title:Advanced method for measuring velocity of shallow flow on hill-slope with an electrolyte tracer
Authors:Shi, Xiaonan (1); Lei, Tingwu (1); Xia, Weisheng (4)
Author affiliation:(1) College of Hydraulic and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China; (3) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Science/Ministry of Water Resources, Yangling 712100, China; (4) College of Resources and Environment Science, Hunan Normal University, Changsha 410081, China
Corresponding author:Lei, T.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 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:The measurement of velocity of shallow water flow is of great importance for hill-slope hydrology and soil erosion prediction. The electrolyte tracer pulse model was found to be unable to predict the velocity correctly at short distance though it is desired for portable apparatus development. In this paper, electrolyte tracer normal distribution model was proposed by using Normal distribution function as boundary condition instead of pulse function to predict velocity of shallow water flow. An improved method for measuring the flow velocity was advanced based on the Normal Distribution Model, which uses the convolution integral of the pulse response and the normal distribution boundary as the more realistic solution to the solute transport processes. By fitting the Normal Distribution Model with the actually measured solute transport processes, the flow velocity values under different conditions were estimated. Compared with the velocity values measured with the pulse model, the Normal Distribution Model reduced the measurement errors at different locations to different degrees. The results will provide theoretical foundation for advanced apparatus development of velocity measurement.
Number of references:20
Main heading:Normal distribution
Controlled terms:Distribution functions - Electrolytes - Flow of water - Flow velocity - Forecasting - Hydraulics - Measurement errors - Solute transport - Velocimeters - Velocity  - Velocity measurement - Water
Uncontrolled terms:Convolution integrals - Improved methods - Measurement of velocity - Normal distribution model - Pulse model - Pulse response - Shallow flow - Shallow water flow - Short distances - Slope hydrology  - Soil erosion - Theoretical foundations
Classification code:804.2 Inorganic Compounds - 912.2 Management - 921 Mathematics - 922 Statistical Methods - 943.3 Special Purpose Instruments - 922.1 Probability Theory - 931 Classical Physics; Quantum Theory; Relativity - 931.1 Mechanics - 943.2 Mechanical Variables Measurements - 922.2 Mathematical Statistics - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 444 Water Resources - 444.2 Groundwater - 461.3 Biomechanics, Bionics and Biomimetics - 483.1 Soils and Soil Mechanics - 631 Fluid Flow - 631.1.1 Liquid Dynamics - 632.1 Hydraulics - 702 Electric Batteries and Fuel Cells
DOI:10.3969/j.issn.1002-6819.2010.05.011
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 5>
Accession number:20102713062795
Title:Diagnosis method of cucumber disease with hyperspectral imaging in greenhouse
Authors:Tian, Youwen (1); Li, Tianlai (2); Zhang, Lin (1); Wang, Xiaojuan (1)
Author affiliation:(1) College of Information and Electric Engineering, Shenyang Agricultural University, Shenyang 110866, China; (2) College of Horticulture, Shenyang Agricultural University, Shenyang 110866, China
Corresponding author:Li, T.
      (tianlaili@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:202-206
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the accuracy and efficiency of diagnosis for cucumber disease in greenhouse, the hyperspectral imaging technology was proposed. The cucumber disease of downy mildew and powdery mildew were adopted as the experimental object. The cucumber disease hyperspectral images data were acquired by a hyperspectral imaging system. The feature wavelength images were selected via analysis between 450 nm and 900 nm wavelength hyperspectral imaging. Then these images were filtered to eliminate noise. And texture features were extracted based on chromaticity monuments of cucumber disease in leaf. Finally, the SVM was used to diagnose cucumber disease. The experimental results show that the accuracy of diagnosing cucumber disease of downy mildew and powdery mildew with hyperspectral imaging technology was 100%. So, the hyperspectral imaging technology can be used to diagnose cucumber disease, which has better features of accuracy and efficiency.
Number of references:17
Main heading:Diagnosis
Controlled terms:Fungi - Greenhouses - Imaging techniques - Support vector machines
Uncontrolled terms:Chromaticity monuments - Cucumber disease - Diagnosis methods - Downy mildew - Hyper-spectral images - Hyperspectral Imaging - Hyperspectral imaging systems - Powdery mildew - Texture features
Classification code:821.6 Farm Buildings and Other Structures - 801.2 Biochemistry - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications - 461.9 Biology - 461.6 Medicine and Pharmacology - 402.1 Industrial and Agricultural Buildings
DOI:10.3969/j.issn.1002-6819.2010.05.035
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 6>
Accession number:20102713062780
Title:Damage characteristics and regularity of peanut kernels under mechanical shelling
Authors:Na, Xuejiao (1); Liu, Mingguo (2); Zhang, Wen (1); Li, Fei (1); Du, Xin (1); Gao, Lianxing (1)
Author affiliation:(1) College of Engineering, Shenyang Agricultural University, Shenyang 110866, China; (2) Liaoning Province Farm Machinery Quality Supervise Administration Station, Shenyang 110034, China
Corresponding author:Gao, L.
      (lianxing_gao@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:117-121
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study kernel damage mechanism and regularity during peanut shelling process and improve design of peanut sheller, main peanut varieties planted in Liaoning province were taken as example, peanut kernel' shape characteristics, damage characteristic and regularity was studied by micro-electronic tension and compression testing machine and stereo microscope, some relevant mechanical test were carried out under different varieties of peanut kernels, different load-speeds and different compression positions. The results showed that the crushing force to peanut kernel were remarkable when peanut kernels are different varieties and they are compressed under different positions; at the loading rate of 10 mm/min, the average crushing force on right side and lateral side of Silihong were 106.2 N and 96.6 N, correspondingly, Huayu23 were 79.8 N and 58.3 N; Breaking deformation and maximum breaking load-forces were both reduced when load-speed were increased.
Number of references:16
Main heading:Damage detection
Controlled terms:Agricultural machinery - Agriculture - Compression testing - Crushing - Load testing - Machine design - Yield stress
Uncontrolled terms:Breaking load - Damage mechanism - Liaoning Province - Loading rate - Mechanical tests - Peanuts - Shape characteristics - Stereo-microscopes - Tension and compression
Classification code:951 Materials Science - 943 Mechanical and Miscellaneous Measuring Instruments - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 802.3 Chemical Operations - 601 Mechanical Design - 533.1 Ore Treatment - 483.1 Soils and Soil Mechanics - 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.1002-6819.2010.05.020
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 7>
Accession number:20102713062772
Title:Vertical variations of soil moisture and total nitrogen in small catchment on Loess Plateau
Authors:Liu, Zhipeng (1); Shao, Ming'an (1)
Author affiliation:(1) State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest Sci-Tech. University of Agriculture and Forestry, Yangling 712100, China; (2) Graduate School, Chinese Academy of Sciences, Beijing 100049, China
Corresponding author:Shao, M.
      (mashao@ms.iswc.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:71-77
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This study was to investigate the vertical distribution and variations of soil moisture and soil total nitrogen under different vegetation types on the Loess Plateau. Soil moisture and soil total nitrogen in 0-800 cm profile under five vegetation types, i.e., alfalfa, wild grass, crop, caragana and pine, were measured and analyzed. Soil moisture had a remarkable stratified distribution in the vertical direction, with vicissitudinary dry and wet layers. The vertical distribution of soil moisture was affected by vegetation type. Different vegetation type had different occurrence depth of relatively dry and wet layers and different average soil moisture. Cropland and grassland performed better in soil water retention. Soil moisture of these two vegetation types showed greater vertical variation. The two planted vegetation types, alfalfa and caragana, consumed much more soil water, and thus did not have a pronounced vertical variation in soil moisture. Soil moisture under pine trees had middle value and moderate variation extent. Soil total nitrogen of the study area was low, with a sudden decline in top 20 cm layer and still gently decreased below 20 cm depth. Soil total nitrogen was higher under caragana than those under other four vegetation types.
Number of references:26
Main heading:Vegetation
Controlled terms:Agriculture - Catchments - Moisture determination - Nitrogen - Soil moisture - Soil surveys - Underwater soils
Uncontrolled terms:Dry and wet - Loess Plateau - Pine trees - Small catchment - Soil total nitrogen - Soil water - Soil water retention - Study areas - Total nitrogen - Vegetation type  - Vertical direction - Vertical distributions - Vertical variation
Classification code:944.2 Moisture Measurements - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 525.1 Energy Resources and Renewable Energy Issues - 483.1 Soils and Soil Mechanics - 471.1 Oceanography, General - 461.9 Biology - 444 Water Resources - 406.2 Roads and Streets
DOI:10.3969/j.issn.1002-6819.2010.05.012
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 8>
Accession number:20102713062799
Title:Control strategy of off-grid household wind power generation system
Authors:Ning, Shiguo (1); Ye, Lin (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Ye, L.
      (YL@cau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:232-239
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 electricity shortage can be effectively alleviated by developing household wind power generation system in vast rural areas. A model of household wind power generation system was created in Electro Magnetic Transient Program/Alternative Transient Program (EMTP/ATP) software package based on the mathematical models of wind speeds, wind turbine and permanent magnet synchronous generator (PMSG). Control strategy of household wind power generation system was developed and investigated in off-grid operation. Case studies were carried out in this paper and simulation results showed that control strategy proposed for off-grid based household wind power system can respond immediately to track winds and load changes.
Number of references:18
Main heading:Mesh generation
Controlled terms:Electric power generation - Mathematical models - Rural areas - Synchronous generators - Wind power
Uncontrolled terms:Control strategies - Electro-magnetic transient - Load change - Off-grids - Permanent magnet synchronous generator - Power system simulation - Power system simulations - Simulation result - Wind power generation systems - Wind power systems  - Wind speed
Classification code:921 Mathematics - 901.4 Impact of Technology on Society - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723.5 Computer Applications - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 705.2.1 AC Generators - 615.8 Wind Power (Before , use code ) - 615 Thermoelectric, Magnetohydrodynamic and Other Power Generators - 403.2 Regional Planning and Development - 705.2 Electric Generators
DOI:10.3969/j.issn.1002-6819.2010.05.040
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 9>
Accession number:20102813064311
Title:Development of information system for investigation and evaluation of economic situation of regional agriculture based on WebGIS and models
Authors:Li, Weijiang (1); Wu, Yongxing (2); Mao, Guofang (3)
Author affiliation:(1) Department of Geography, Shanghai Normal University, Shanghai 200234, China; (2) Department of Geography, East China Normal University, Shanghai 200062, China; (3) Shanghai Agro-technology Extension Service Center, Shanghai 201103, China
Corresponding author:Li, W.
      (LWJ@shnu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:213-219
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 dynamically and accurately obtain the information of input structure, output level, and economic benefits of regional agriculture production, based on the spatial-temporal database and the open source map server of SharpMap, the WebGIS-based information system for investigation and evaluation of economic situation of regional agriculture (SHAEWS) was developed with ASP.NET(C#). The construction of SHAEWS was divided into two parts: agricultural input-output database and model system. The database was composed of sample monitoring data, relief map data and metadata. The model system covered crop data analysis and aggregation model, crop stubbles extraction and analysis model, Cobb-Douglas production model, and comprehensive evaluation model, etc. SHAEWS included nine functional subsystems named as sample data acquisition, sample data examination, crops evaluation, crop stubble evaluation, crops input-output simulation with Cobb-Douglas production function, time series analysis, spatial analysis, data report, and metadata browsing, respectively. The results show that SHAEWS can combine sample monitoring data with map data and through relevant model calculations, can achieve the on-line sharing, analysis, evaluation and consultant service of agricultural input-output information.
Number of references:15
Main heading:Computer simulation
Controlled terms:Crops - Data reduction - Economics - Information dissemination - Information systems - Metadata - Time series - Time series analysis
Uncontrolled terms:Aggregation model - Analysis models - ASP.NEt - Cobb-Douglas - Cobb-Douglas production function - Comprehensive evaluation model - Data analysis - Economic benefits - Economic situation - Evaluation  - Functional subsystems - Input output model - Input-output - Map data - Map servers - Model calculations - Model system - Open sources - Output levels - Production models  - Sample data - Spatial analysis - Spatial temporals - Web-GIS
Classification code:971 Social Sciences - 922.2 Mathematical Statistics - 911.2 Industrial Economics - 903.3 Information Retrieval and Use - 903.2 Information Dissemination - 821.4 Agricultural Products - 723.5 Computer Applications - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2010.05.037
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 10>
Accession number:20102713062824
Title:Process of heparin extraction using ultrasonic assisted salting out
Authors:Zhang, Liping (1); Song, Dawei (2); Ma, Zhongsu (1)
Author affiliation:(1) College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China; (2) Agricultural-Food Processing and Engineering Technology Research Center of Heilongjiang Province, Daqing 163319, China
Corresponding author:Ma, Z.
      (zsma@jlu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:379-384
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The effects of ultrasonication on heparin extraction were studied, and the technological parameters were optimized. Porcine intestines of commercial slaughtered were treated with ultrasonic assisted salting out to extract heparin. Based on the single factor tests for ultrasonication power, ultrasonication temperature, ultrasonication time, and the ratios of solution to material, a four-variable quadratic orthogonal rotation combination experimental design was applied to optimize the parameters for ultrasonic extraction heparin. The results indicated that the heparin yield was the highest under the conditions which ultrasonication power was set at 300 W, ultrasonication temperature 40&deg;C, ultrasonication time 40 min, and ratio of solution to materials was 15 mL/mg. According to these conditions, the heparin yield was 0.0184%. Which was 10% more than the yield of salting out extraction, and the extraction time was decreased by 2 h. The results suggested that the ultrasonic wave extraction process was feasible, and the extraction yield of heparin was higher than the conventional salting out method, therefore, research on this technology was significant important for practical application.
Number of references:33
Main heading:Extraction
Controlled terms:Optimization - Polysaccharides - Ultrasonic waves - Ultrasonics
Uncontrolled terms:Experimental design - Extraction process - Extraction time - Extraction yield - Heparin - Optimization technology - Quadratic orthogonal rotation - Salting out - Technological parameters - Ultra-sonication  - Ultrasonic extraction
Classification code:753.1 Ultrasonic Waves - 802.3 Chemical Operations - 804.1 Organic Compounds - 815.1.1 Organic Polymers - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2010.05.065
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 11>
Accession number:20102713062822
Title:Technique of disrupting pollen wall by using steam explosion
Authors:Ni, Hui (1); Cai, Huinong (1); Wu, Liming (2); Yang, Yuanfan (1)
Author affiliation:(1) School of Bioengineering, Jimei University, Xiamen 361021, China; (2) Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China; (3) Food Bio-engineering Research Center of Xiamen, Xiamen 361021, China
Corresponding author:Cai, H.
      (chn@jmu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:367-372
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Aiming to develop an industrial method for disrupting pollen, steam-explosion technique was studied. The optimal procedure was composed of the following steps. First, dry pollen was mixed with 0.05 mol/L of citrus acid solution to 40% concentration and homogenized by a constitution agitator. Then, the pollen paste was put into the material chamber, and heated to 0.15 MPa with 0.4 MPa supersaturated steam for 11 s. After the steam valve was closed and the material discharge valve was opened, the pollen paste was sprayed out of the material chamber, and pollen cells were exposed due to the variety of pressure and temperature. Treated by the procedure, 86% of pollen content was spread out, which caused amount increases of vitamin A, vitamin C and cruel lipids. Additional it also caused the decreases of total bacterial count and total coliform group. Furthermore, the results of amplified process showed no significant changes in pollen wall broken rate, A280 and nutrition extraction rate. The newly developed process for disrupting pollen is of high efficiency, high safety, high stability, and easy to be amplified. It has good application prospect.
Number of references:21
Main heading:Steam
Controlled terms:Agriculture - Organic polymers
Uncontrolled terms:Acid solutions - Application prospect - Coliform group - Extraction rate - High efficiency - High safety - High stability - Industrial methods - Material discharge - Pollen walls  - Pressure and temperature - Steam explosion - Steam sterilization - Steam valves - Supersaturated steam - Total bacterial count - Vitamin A - Vitamin C
Classification code:614 Steam Power Plants - 617.2 Steam Turbines - 617.3 Steam Engines - 641.1 Thermodynamics - 815.1.1 Organic Polymers - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2010.05.063
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 12>
Accession number:20102713062778
Title:Design of stacking mechanism for corn straws on combine
Authors:Cong, Hongbin (1); Li, Ruxin (1); Li, Hongjiang (2); Miao, Naishu (3); Zhang, Mingyuan (2); Fu, Jing (4)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai'an 271000, China; (2) Foton Lovol International Heavy Industries Co., Ltd, Weifang 261206, China; (3) ShanDong Agriculture Machinery Research Institute, Ji'nan 250100, China; (4) Jining Institute of Technology, Jining 272000, China
Corresponding author:Li, R.
      (rxli@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:5
Issue date:May 2010
Publication year:2010
Pages:107-111
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:Harvesting whole stalk by mechanization, as an important link of comprehensive exploitation and utilization for corn straws, can improve their recovery efficiency, and reduce their recovery cost. Based on the existing corn harvest mechanization techniques, a stacking mechanism for corn straws on combine was developed, corn stalks were cut off and paved on line by a milling cutter, a screw conveyor and a group of pressure delivery devices etc., and then they were collected into stack by a hay rake which was installed on the back of the combine. Mechanical-electrical-liquid technique was adopted on the hay rake, operator could easily change the distance of corn straw stacks through adjusting knobs, and could easily start or stop working process through operating corresponding buttons. Experiment results showed that the stacking mechanism for corn straws on combine worked safely and reliably, and its atuomatic control system ran accurately and efficiently, the efficiency of whole stalk harvest increased more than 50% compared with traditional way. The system provides conditions for the recovery and efficient ecological use of corn straw.
Number of references:14
Main heading:Machine design
Controlled terms:Combines - Cost reduction - Harvesting - Machinery - Mechanization - Milling (machining) - Recovery
Uncontrolled terms:Corn stalk - Corn straws - Cut-off - Delivery device - Design recovery - Recovery costs - Recovery efficiency - Stacking mechanism - Working process
Classification code:911.2 Industrial Economics - 821.3 Agricultural Methods - 821.1 Agricultural Machinery and Equipment - 912.2 Management - 622.5 Radioactive Wastes - 601 Mechanical Design - 531 Metallurgy and Metallography - 604.2 Machining Operations
DOI:10.3969/j.issn.1002-6819.2010.05.018
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 13>
Accession number:20102713062807
Title:Adsorption of organic by using rice husk ash of power generation residue
Authors:Xie, Jie (1); Chen, Tianhu (1); Qing, Chengsong (1); Song, Hao (1)
Author affiliation:(1) School of Resource and Environment Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author:Xie, J.
      (xiejie@gmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:283-287
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:Using rice husk ash as absorbent to remove organic pollutant was studied in this paper to solve the problem of the residue after power generation using rice husk. It is indicated that rice husk ash treated by alkaline cleaning was effective in removing organic pollutants. When the pH value of solution was less than 7.0, the removal effectiency of organic was better than the pH value greater than 7.0. It was proved in this study that the rice husk ash could be used as adsorbent to remove organic pollutant.
Number of references:27
Main heading:Organic pollutants
Controlled terms:Absorption - Adsorption - Ash handling - pH effects
Uncontrolled terms:Alkaline cleaning - pH value - Rice husk - Rice husk ash
Classification code:804.1 Organic Compounds - 802.3 Chemical Operations - 801.1 Chemistry, General - 691.1 Materials Handling Equipment - 931.2 Physical Properties of Gases, Liquids and Solids - 454 Environmental Engineering - 452.4 Industrial Wastes Treatment and Disposal - 451.1 Air Pollution Sources - 444 Water Resources - 453.1 Water Pollution Sources
DOI:10.3969/j.issn.1002-6819.2010.05.048
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 14>
Accession number:20102713062798
Title:Physicochemical properties and viscosity-temperature characteristic of jatropha curcas oil as fuel
Authors:Luo, Fuqiang (1); Wang, Ziyu (1); Liang, Yu (2); Pan, Junru (3); Guo, Jian (1)
Author affiliation:(1) School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China; (2) Department of Mechanical and Electronic Engineering, Guiyang University, Guiyang 550003, China; (3) Jiangsu Jianghuai Engine Co., Ltd, Yancheng 224002, China
Corresponding author:Luo, F.
      (luofq@ujs.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:227-231
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 specific physicochemical properties of jatropha curcas oil (especially viscosity) is an important restrictive factor that jatropha curcas oil was applied in diesel engine. Therefore, the study on physicochemical properties of jatropha curcas oil and viscosity-temperature characteristic is very important for practical application of jatropha curcas oil and has important guiding significance. The physicochemical properties of jatropha curcas oil were analyzed, and viscosity was measured at different temperatures in a variety of reagents with a rotating viscometer for studying the viscosity-temperature properties of jatropha oil. The results showed that physicochemical properties of jatropha curcas oil had some difference with that of regular diesel, but jatropha curcas oil could be a fuel of diesel engine. Moreover, with increase of temperature, the viscosity of jatropha curcas oil gradually decreased, and at 150&deg;C, it could reach leve of diesel at room temperature (20&deg;C), so the preheated jatropha curcas oil could be used directly as a fuel of diesel engine. In particular, the viscosity of mixed reagent (the mass fraction of 20% jatropha curcas oil and diesel fuel blends made of 80%) is more suitable for practical application.
Number of references:20
Main heading:Viscosity
Controlled terms:Diesel engines - Diesel fuels - Fuel oils - Viscometers
Uncontrolled terms:Diesel fuel blends - Jatropha - Jatropha curcas - Mass fraction - Mixed reagent - Oil mixtures - Physicochemical property - Room temperature - Viscosity-temperature
Classification code:523 Liquid Fuels - 612.2 Diesel Engines - 631.1 Fluid Flow, General - 931.2 Physical Properties of Gases, Liquids and Solids - 943.3 Special Purpose Instruments
DOI:10.3969/j.issn.1002-6819.2010.05.039
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 15>
Accession number:20102713062773
Title:Spatial autogression model for heavy metals in cultivated soils of Beijing
Authors:Huo, Xiaoni (1); Li, Hong (1); Sun, Danfeng (2); Zhang, Weiwei (2); Zhou, Liandi (1); Li, Baoguo (2)
Author affiliation:(1) Institute of Comprehensive Research, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (2) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (3) Department of Environmental Engineering, Taiyuan University, Taiyuan 030009, China
Corresponding author:Li, H.
      (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:5
Issue date:May 2010
Publication year:2010
Pages:78-82
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:In order to effectively reveal the effect of influencing factors on heavy metals and provide scientific basis for controlling heavy metals pollution, conventional linear regression model and spatial autogression model were applied to analyze the relationship between heavy metals and their influencing factors in Beijing cultivated soils. The results showed that the spatial autogression model for Cr, Ni, Zn, and Hg had a better goodness-of-fit than conventional linear regression model, and yielded residuals without spatial autocorrelation, indicating that the spatial autogression model could explain the relationship between heavy metals and their influencing factors excellently. Results showed that the important influencing factors for Cr and Ni were soil parent materials and land use intensity, and the main influencing factors for Zn and Hg were mining establishments, road and oil parent materials.
Number of references:16
Main heading:Geologic models
Controlled terms:Chromium - Linear regression - Mercury (metal) - Metals - Soils - Zinc
Uncontrolled terms:Beijing - Cultivated soils - Cultivated spatial autogression - Goodness of fit - Heavy metals pollution - Influencing factor - Linear regression models - Parent materials - Spatial autocorrelations
Classification code:922.2 Mathematical Statistics - 549.3 Others, including Bismuth, Boron, Cadmium, Cobalt, Mercury, Niobium, Selenium, Silicon, Tellurium and Zirconium - 546.3 Zinc and Alloys - 543.1 Chromium and Alloys - 531 Metallurgy and Metallography - 483.1 Soils and Soil Mechanics - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2010.05.013
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 16>
Accession number:20102713062819
Title:Prediction model for decay index of strawberry fruit based on ethanol content
Authors:Xing, Hongjie (1); Di, Huatao (1); Cai, Yan (1); Yu, Meili (1); Shang, Haitao (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:5
Issue date:May 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:For the purpose of fast detection of fruit decay in strawberry fruit during postharvest distribution by gas sensor array, a prediction model for decay index based on ethanol content was developed in this study. Freshly harvested strawberries were stored at different temperatures (273, 278, 283, 288, 293 and 298 K). Changes in decay index and ethanol content of strawberry fruit were determined during storage. Firstly, a kinetic model of ethanol content with respect to storage time and temperature was developed based on the Arrhenius equation. Secondly, a kinetic model of decay index with respect to storage time and temperature was also developed based on the zero order equation. Finally, a prediction model for decay index based on ethanol content was further developed according to the linear relationship between decay index and ethanol content. The three models were then verified with the strawberry fruit stored at 275, 280, 285, 290, 295 and 300 K. The relative prediction errors were found to be 0.76%, 5.89%, 7.08% respectively, and the prediction accuracy was acceptable. There was no significant difference in prediction accuracy between the kinetic model of decay index and prediction model for decay index based on ethanol content. The results suggest that decay index of strawberry fruit can be accurately predicted at the storage temperature from 273 to 300 K by the prediction model for decay index based on ethanol content, which lays the foundation for the non-destructive real-time measurement of fruit quality using gas sensor array.
Number of references:15
Main heading:Fruits
Controlled terms:Chemical sensors - Decay (organic) - Ethanol - Forecasting - Gas detectors - Kinetic theory - Mathematical models - Sensor arrays - Time measurement
Uncontrolled terms:Arrhenius equation - Decay index - Fruit quality - Gas sensor arrays - Kinetic models - Linear relationships - Non destructive - Nondestructive detection - Postharvest - Prediction accuracy  - Prediction errors - Prediction model - Real time measurements - Storage temperatures - Storage time - Strawberry fruits - Three models - Zero-order equation
Classification code:821.4 Agricultural Products - 912.2 Management - 914.1 Accidents and Accident Prevention - 811.2 Wood and Wood Products - 921 Mathematics - 931.1 Mechanics - 943.3 Special Purpose Instruments - 922.2 Mathematical Statistics - 804.1 Organic Compounds - 522 Gas Fuels - 523 Liquid Fuels - 716 Telecommunication; Radar, Radio and Television - 503.2 Coal Mining Operations - 732 Control Devices - 801.2 Biochemistry - 802.2 Chemical Reactions - 801 Chemistry
DOI:10.3969/j.issn.1002-6819.2010.05.060
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 17>
Accession number:20102713062788
Title:Driver model for obstacle avoidance based on CarSim
Authors:Wang, Tao (1); Jiang, Jinfeng (2); Lin, Youting (2); Lin, Qiufeng (3); Zhang, Wenming (1)
Author affiliation:(1) School of Civil and Environment, University of Science and Technology Beijing, Beijing 100083, China; (2) School of Engineering, National Pingtung University of Science and Technology, Pingdong 000912, China; (3) Taiwan Metal Industrial Research Center, Gaoxiong 000800, China
Corresponding author:Lin, Q.
      (chiufeng@mail.npust.edu.tw)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:159-163
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 driver model which is used to simulate the behavior of driver obstacle avoidance under two different states of mind was to be established. According to the characteristics of crossover model between driver and vehicle, PID (proportion integration differentiation) control rule and time delay were used to express the driver trajectory dynamic model. A model of vehicle dynamic with two degrees of freedom was built and some parameters were set to construct the driver model. Finally CarSim vehicle simulation software was applied to simulate the driving behaviour and reaction of driver under different states of mind. The result of study showed that both the delay of reaction time and obstacle avoidance behavior of human were different when the drivers were under different states of mind. Therefore, the developed driver model matched with the actual mental state of drivers, and the results will lay the foundation for future research which is to develop a control algorithm for a driver obstacle avoidance assistance system.
Number of references:16
Main heading:Vehicles
Controlled terms:Algorithms - Computer software - Delay control systems
Uncontrolled terms:Assistance system - Control algorithms - Control rules - Cross-over model - Driver models - Driving behaviour - Mental state - Obstacle avoidance - Obstacle avoidance behaviors - Reaction time  - Two degrees of freedom - Vehicle dynamics - Vehicle simulation
Classification code:432 Highway Transportation - 723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.05.028
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 18>
Accession number:20102713062790
Title:Design of temperature and humidity auto-control system with fuzzy decoupling for rice seedling
Authors:Guo, Youqiang (1); Pei, Xuezhu (1); Lu, Cangui (1)
Author affiliation:(1) Computer Sci-tech Department, Bengbu College, Bengbu 233030, China
Corresponding author:Guo, Y.
      (bbxyguo@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 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:Temperature and humidity auto-control system with fuzzy decoupling for seedling has been designed to improve the quality of mechanical operations and automatic level for seedling. It applied real-time sampling control to unfold or fold the plastic-film shed for the seedling bed automatically according to the real-time changes of temperature in the seedling bed. It could also irrigate the seedling bed or stop irrigating automatically according to the real-time changes of soil water content of the land. In order to solve the phenomenon of cross-coupling between temperature and humidity. The decoupling factors &psi;<inf>1</inf>, &psi;<inf>2</inf> had been introduced and the fuzzy control algorithm with decoupling adopted in it. The practice shows this system operates reliably and stably, and it can better meet the seedlings' technical demands for the temperature and humidity.
Number of references:15
Main heading:Humidity control
Controlled terms:Algorithms - Cements - Control systems - Fuzzy control - Moisture determination - Plastics - Soil moisture - Temperature control - Underwater soils - Water content
Uncontrolled terms:Auto-control - Cross-couplings - Decoupling control - Decoupling controls - Fuzzy control algorithms - Fuzzy decoupling - Mechanical operations - Real-time changes - Real-time sampling - Rice seedlings  - Soil water content - Technical demands
Classification code:944.2 Moisture Measurements - 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 731.3 Specific Variables Control - 817.1 Polymer Products - 921 Mathematics - 723 Computer Software, Data Handling and Applications - 483.1 Soils and Soil Mechanics - 471.1 Oceanography, General - 444 Water Resources - 412.1 Cement - 402 Buildings and Towers - 643.3 Air Conditioning
DOI:10.3969/j.issn.1002-6819.2010.05.030
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 19>
Accession number:20102713062787
Title:Noise source identification and noise abatement of truck under idle speed condition
Authors:Chu, Zhigang (1); Wang, Weidong (3); Xiao, Xinbiao (4)
Author affiliation:(1) College of Mechanical Engineering, Chongqing University, Chongqing 400030, China; (2) State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China; (3) Technical Center of Dongfeng Commercial Vehicle Manufactory, Shiyan 442000, China; (4) Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China
Corresponding author:Chu, Z.
      (czg@cme.cqu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:153-158
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 eliminate the obviously abnormal noise of truck under idle speed condition, the noise source was identified based on sound intensity method and source separation method. The results showed that intake orifice and shell surface of air cleaner were dominant radiation sources whose frequency range from 288 Hz to 344 Hz, and root of noise source was the air compressor. The modification that expansion muffler was added into air compressor intake system was put forward. The analysis results of transmission loss of air compressor intake system based on finite elements method showed that the muffler could fulfill the requirement. Furthermore, experiment results of modified vehicle showed that the noise range from 25 Hz to 1600 Hz at the typical measurement point had been reduced from 77.48 dBA to 73.21 dBA. The abnormal noise is eliminated and the sound quality is improved obviously.
Number of references:15
Main heading:Noise abatement
Controlled terms:Acoustic noise - Air cleaners - Air intakes - Automobile mufflers - Automobiles - Compressors - Expansion - Quantum optics - Trucks
Uncontrolled terms:Air compressor - Analysis results - Finite-elements method - Frequency ranges - Idle speed - Intake noise - Measurement points - Noise range - Noise source - Noise source identification  - Radiation source - Shell surface - Sound intensity - Sound Quality - Source separation - Transmission loss
Classification code:931.4 Quantum Theory; Quantum Mechanics - 751.4 Acoustic Noise - 741.1 Light/Optics - 663.2 Heavy Duty Motor Vehicle Components - 663.1 Heavy Duty Motor Vehicles - 951 Materials Science - 662.4 Automobile and Smaller Vehicle Components - 651.2 Wind Tunnels - 631.1 Fluid Flow, General - 618.1 Compressors - 451.2 Air Pollution Control - 662.1 Automobiles
DOI:10.3969/j.issn.1002-6819.2010.05.027
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 20>
Accession number:20102713062814
Title:Farmland grading based on land evaluation and site assessment method in Jingyang County, Shaanxi Province
Authors:Li, Tuansheng (1); Zhao, Dan (1); Shi, Yuqiong (1)
Author affiliation:(1) College of Earth Science and Resources, Chang'an University, Xi'an 710054, China; (2) Heze Bureau of Land and Resources, Heze 274000, China
Corresponding author:Li, T.
      (tuanshen@chd.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:324-328
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 land evaluation and site assessment (LESA) method, the farmland of Jingyang County in Shannxi Province was graded with results of five grades in quality. The grading process was divided into two parts, one being the farmland natural quality valuation and another social-economical quality valuation. In these two parts, principal component analysis was used to select evaluation factors. And the Delphi method was used to determine the weights of factors. Finally based on natural quality valuation and social-economical quality valuation, the total grading indices of a grading unit was calculated by weight sum of natural quality index and the social-economical quality index. The weights of two parts were determined by correlation of farmland grading index and standard corn output. The grade one farmland of Jingyang County was 6.79% of total farmland in area, being the best in quality. And grade 2nd, 3rd, 4th and 5th occupied 26.23%, 26.07%, 19.39% and 13.88% in area, respectively. LESA method can be used in land gradation. It is the one of the good methods for land gradation.
Number of references:12
Main heading:Grading
Controlled terms:Decision making - Farms - Land use - Principal component analysis - Surveys
Uncontrolled terms:Delphi method - Evaluation factor - Grading process - Land evaluation - Land evaluation and site assessment method - Quality indices - Region planning - Site assessment
Classification code:913.3 Quality Assurance and Control - 912.2 Management - 903.1 Information Sources and Analysis - 922.2 Mathematical Statistics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 405.3 Surveying - 403 Urban and Regional Planning and Development - 442.2 Land Reclamation
DOI:10.3969/j.issn.1002-6819.2010.05.055
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 21>
Accession number:20102713062809
Title:Hazard degree assessment to arable land damaged by Wenchuan Earthquake
Authors:Xie, Xianjian (1); Huang, Xiaolin (2); Yuan, Tianfeng (1)
Author affiliation:(1) School of Resources and Environment Science, Neijiang Normal University, Neijiang 641000, China; (2) The Land Resources Bureau of Jiangyou City, Jiangyou 621700, China
Corresponding author:Yuan, T.
      (yuantianfeng@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:295-301
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:Wenchuan Earthquake with floods played a huge role in the destruction to arable land of catastrophe areas. In this paper, from the point of view of the recovery and reconstruction of agricultural production after the earthquake disaster, based on the integrated view of disaster system, an Arable Land Hazard Degree Index Model was established, which took township of Jiangyou City as the basic statistical unit. Ten indicators, such as disaster situation, pregnant disaster environment and the rebuilding pressure of arable land of the bearing disaster body, were selected, and R-type factor analysis method was used. Then supported by ArcGIS, Jiangyou City was divided into different hazard degree zones of arable land. The results showed that, among the 40 towns in Jiangyou City, there are 18 towns, accounting 45.31% of city land were severely damaged, mainly distributed in the central city western mountainous and hilly transition zone and the hilly areas, in which 7.76% disaster area could not carry on land reclamation; while there were 10 towns, accounting 22.17% of city land were moderately damaged, mainly locating in the northwestern mountains, as well as the transition zone between the mildly and severely damaged arable land area, in which 4.39% disaster area could not carry on land reclamation; and there were 12 towns accounting 32.52% of city land were mildly damaged, mainly spreading in the eastern plains and the transition zone of plains and hills, in which 0.76% disaster area could not carry on land reclamation. The results can be used to guide the cultivated land reclamation and provide scientific basis for agricultural ecosystems restoration.
Number of references:19
Main heading:Land reclamation
Controlled terms:Earthquakes - Ecosystems - Forestry - Hazards - Land use - Landforms - Reclamation - Repair
Uncontrolled terms:Agricultural ecosystems - Agricultural productions - Arable land - Cultivated lands - Disaster areas - Disaster system - Earthquake disaster - Factor analysis method - Hazard degree - Hazard degree assessment  - Hilly areas - Index models - Transition zones - Wenchuan Earthquake
Classification code:914.1 Accidents and Accident Prevention - 913.5 Maintenance - 821.0 Woodlands and Forestry - 484 Seismology - 481.1 Geology - 454.3 Ecology and Ecosystems - 452.4 Industrial Wastes Treatment and Disposal - 442.2 Land Reclamation - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.05.050
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 22>
Accession number:20102713062775
Title:Comprehensive evaluation for ecological economy of soil and water conservation engineering in upper Yangtze River in Sichuan Province
Authors:Deng, Ou (1); Yin, Zhongdong (3); Feng, Zhongke (1); Li, Yiqui (1); Zhang, Dongyou (1)
Author affiliation:(1) Institute of GIS, RS and GPS, Beijing Forestry University, Beijing 100083, China; (2) Mianyang Normal University, Mianyang 621000, China; (3) College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China; (4) Haerbin Normal University, Haerbin 150025, China
Corresponding author:Feng, Z.
      (fengzhongke@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:88-95
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 erosion management strategy and its ecological economy evaluation in small watershed are hot issues of water and soil conservation disciplines. Researches taking the whole execution scope of the project as an object were few. Regarding comprehensive governance region of small watershed in county level administrative area as appraisal unit, this paper investigates the principal components of management approaches towards soil and water conservation in the fifth project in upper Yangtze River in Sichuan Province and relationship between the principal components and ranking of ecological economy development. In this paper, there are 46 socio-economical and ecological indices selected to represent the impacts of the project. By using principal component analysis and multiple regression analysis, there are 13 principal components found and there is a multiple linear regression model between ranking of ecological economy development and the principal components. The result shows that the different approaches, extension and intension of approaches are significant contributions to ecological economy development.
Number of references:19
Main heading:Principal component analysis
Controlled terms:Ecology - Economic analysis - Landforms - Linear regression - Soil conservation - Soils - Water conservation - Watersheds
Uncontrolled terms:Changzhi project - Comprehensive evaluation - County level - Ecological economy - Ecological indices - Multiple linear regression models - Multiple regression analysis - Principal Components - Principal components analysis - Project ecology  - Sichuan province - Small watersheds - Soil and water conservation - Soil erosion - Upper Yangtze River
Classification code:922.2 Mathematical Statistics - 911.2 Industrial Economics - 821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 481.1 Geology - 454.3 Ecology and Ecosystems - 444.1 Surface Water - 444 Water Resources - 403.1 Urban Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.05.015
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 23>
Accession number:20102713062766
Title:Effect of irrigation with reclaimed water on soil salt and ion content in Beijing
Authors:Xu, Xiaoyuan (1); Sun, Weihong (3); Wu, Wenyong (2); Liu, Honglu (2); Li, Fahu (3); Dou, Chaoyin (4)
Author affiliation:(1) Institute of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an 710048, China; (2) Beijing Hydraulic Research Institute, Beijing 100048, China; (3) College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; (4) Institute of Geographic Sciences and Natural Resources, Chinese Academy of Sciences, Beijing 100101, China
Corresponding author:Liu, H.
      (liuhonglu@yeah.net)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:34-39
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to promote safe irrigation with reclaimed water for preventing soil salinisation, field experiments were conducted to research the effects of different irrigation durations with reclaimed water on soil salt. The results showed that the irrigation durations of reclaimed water imposed little effect on electrical conductivities and pH value of soils in various depths. Soil sodium ratio (SAR) increased with it, but SAR is still in the scope of the feasible range. The contents of Na⁺, Mg²⁺, K⁺, and Cl^- in one meter soils column increased due to reclaimed water irrigation, which changed slightly in the soil depth from zero to forty centimeters and increased significantly in the soil depth from forty centimeters to eighty centimeters. The results showed that soil salt tended to penetrate outside of tillage layer by precipitation leaching. There is low risk in soil sanitation with reclaimed water irrigation.
Number of references:18
Main heading:Wastewater reclamation
Controlled terms:Electric conductivity - Irrigation - Leaching - pH effects - Precipitation (chemical) - Salinity measurement - Soil conservation - Soils - Water conservation - Water content
Uncontrolled terms:Electrical conductivity - Field experiment - Ion content - pH value - Re-claimed water - Salinisation - Soil depth - Soil salinity - Soil sanitation
Classification code:821.3 Agricultural Methods - 802.3 Chemical Operations - 801.1 Chemistry, General - 701.1 Electricity: Basic Concepts and Phenomena - 533.1 Ore Treatment - 943.3 Special Purpose Instruments - 483.1 Soils and Soil Mechanics - 454.2 Environmental Impact and Protection - 452.4 Industrial Wastes Treatment and Disposal - 444 Water Resources - 403.1 Urban Planning and Development - 471.4 Seawater, Tides and Waves
DOI:10.3969/j.issn.1002-6819.2010.05.006
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 24>
Accession number:20102713062803
Title:Effects of the paricle size and start-up temperature on gasification process of swine manure
Authors:Tu, Deyu (1); Dong, Hongmin (2); Ding, Weimin (3)
Author affiliation:(1) School of Mechanical Engineering, Anhui University of Technology, Maanshan 243002, China; (2) Institute of Agro-Environmental and Sustainable Development, Chinese Academy of Agricultural Science, Beijing 100081, China; (3) College of Engineering, Nanjing Agriculture University, Nanjing 210031, China
Corresponding author:Tu, D.
      (tudeyu@ahut.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:257-262
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 fluidized bed gasifier system was developed and the swine manure air-gasification experiments were carried out. The effects of particle size and start-up temperature on gasification process were studied. The experiments showed the feedstock particle size would influence the solid residence time and contact area in the gasifier. The high temperature field was upper shift with increasing of particle size which required the reactor had enough fluidization height to ensure the solids residence time. The gas highest production rate appeared to 0.5 mm particle size. Solid yield decreased and liquid yield increased with increasing particle size. There had no obvious effects on the composition of gaseous products within 1 mm particle size. Three gasification indexes of fuel gases calorific value, carbon conversion and gasification efficiency were calculated and the 0.5 mm particle size had the best results. The experiments also showed that the higher start-up temperature was, the shorter reactor startup time was, which was beneficial to gaseous production. The yield of liquid products decreased with increasing start-up temperature and the solid production had no fluctuation because of the constant equivalence ratio (ER). The content of some small molecules gases increased with rising of start-up temperature, which was contrary to those of some macromolecules gases. The experiments also showed the start-up temperature had no obvious impacts on the three gasification indexes.
Number of references:17
Main heading:Gasification
Controlled terms:Experiments - Fluidization - Fluidized beds - Gas generators - Liquids - Manures - Particle size
Uncontrolled terms:Carbon conversions - Contact areas - Equivalence ratios - Feedstock particles - Fluidized bed gasifiers - Gaseous products - Gasification efficiency - Gasification process - Gasifiers - High temperature field  - Liquid products - Liquid yield - Production rates - Residence time - Small molecules - Solid residence time - Solid yield - Start-up temperature - Start-ups - Swine manure
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 901.3 Engineering Research - 821.5 Agricultural Wastes - 802.3 Chemical Operations - 943.2 Mechanical Variables Measurements - 802.1 Chemical Plants and Equipment - 522 Gas Fuels - 521.2 Combustors - 452.3 Industrial Wastes - 642.2 Industrial Furnaces and Components
DOI:10.3969/j.issn.1002-6819.2010.05.044
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 25>
Accession number:20102713062791
Title:Development of host computer software for crop water status monitoring system based on wireless sensor networks
Authors:Gao, Feng (1); Yu, Li (2); Wang, Yong (2); Lu, Shangqiong (3); Zhang, Wen'an (2); Yu, Lijie (1)
Author affiliation:(1) Center of Modern Educational Technology, Zhejiang Agriculture and Forestry University, Lin'an 311300, China; (2) College of Information Engineering, Zhejiang University of Technology, Hangzhou 310032, China; (3) Library, Zhejiang Agriculture and Forestry University, Lin'an 311300, China
Corresponding author:Gao, F.
      (gaofeng@zafu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:175-181
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Host computer software for the WSN-CWSM system was developed based on the Microsoft Visual C++ 6.0 and National Instruments LabVIEW 8.6. The designed host computer software was composed of two modules, namely, background management software and data management software. The background management software consisted of four sub-modules: data base, data processing engine, user graphic interface and background component, while the data management software consisted of five sub-modules: parameter setting, data acquisition, data processing, control output and data management. In the host computer software with WSN-CWSM system, standard Internet interface was implemented, correction engine of sensor nodes and data fusion mechanism of sensed data were realized, and all man-machine interfaces were designed as a friendly graphical interface. It was demonstrated by experiments that the designed host computer software possessed many advantages, such as good stability, perfect functionality, convenient man-machine interface, etc., and it could effectively organize and manage all sorts of sensed data as well as system data. At present, the developed host computer software can meet application requirements of the WSN-CWSM system.
Number of references:16
Main heading:Computer software
Controlled terms:Computer programming languages - Crops - Data processing - Interfaces (computer) - Management - SCADA systems - Sensor data fusion - Sensor networks - Sensor nodes - Telecommunication equipment  - Wireless sensor networks
Uncontrolled terms:Application requirements - Data base - Data management - Data management software - Good stability - Graphic interfaces - Graphical interface - Host computers - Internet interface - LabViEW  - Man-machine interface - Management software - Microsoft visual C++ 6.0 - Monitoring system - National Instruments - Parameter setting - Submodules - Water status
Classification code:723 Computer Software, Data Handling and Applications - 723.1.1 Computer Programming Languages - 723.2 Data Processing and Image Processing - 912.2 Management - 731.1 Control Systems - 732.2 Control Instrumentation - 821.4 Agricultural Products - 732 Control Devices - 722.4 Digital Computers and Systems - 722.3 Data Communication, Equipment and Techniques - 716 Telecommunication; Radar, Radio and Television - 716.3 Radio Systems and Equipment - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 722 Computer Systems and Equipment - 722.2 Computer Peripheral Equipment
DOI:10.3969/j.issn.1002-6819.2010.05.031
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 26>
Accession number:20102713062777
Title:Experiment of no-row corn harvesting device with finger wheel
Authors:Zhang, Daolin (1); Diao, Peisong (1); Dong, Feng (2); Liu, Shengchun (1)
Author affiliation:(1) College of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China; (2) College of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author:Zhang, D.
      (zdlzb@sdut.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:103-106
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To solve problem of corn harvesting under different row spacing condition, a technology about ear snapped after stalk cutting and conveying was proposed, and adaptability for row spacing was enhanced by the technology. Corn harvesting device with finger wheel was designed and fabricated by optimization of finger wheel, blades and snapping unit. Through the analysis of key technologies, technology conditions of corn stalk dividing, feeding and conveying were determined. The field tests were conducted in the corn planting areas of northeast of China and Huang-Huai-Hai District. Experiment results showed that all the specifications were met with national standards, row spacing ranged from 300 mm to 800 mm. It is very important to cross regional operation of corn harvester, increase the utilization of corn harvester and enhance the income of owner.
Number of references:15
Main heading:Wheels
Controlled terms:Crops - Harvesters - Harvesting - Machinery - Technology
Uncontrolled terms:Corn harvester - Corn planting - Corn stalk - Field test - Finger wheel - Harvesting devices - Key technologies - National standard - No-row - Row spacing  - Technology condition
Classification code:601 Mechanical Design - 601.2 Machine Components - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods - 821.4 Agricultural Products - 901 Engineering Profession
DOI:10.3969/j.issn.1002-6819.2010.05.017
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 27>
Accession number:20102713062764
Title:Field experiment of measurement accuracy influencing factors of micro-lysimeters
Authors:Long, Tao (1); Xiong, Heigang (2); Li, Baofu (1); Zhang, Jianbing (1)
Author affiliation:(1) College of Resources and Environmental Science, Xinjiang University, Urumqi 830046, China; (2) Urban Department, College of Art and Science, Beijing Union University, Beijing 100083, China; (3) Key Laboratory of Oasis Ecology of Ministry of Education, Urumqi 830046, China
Corresponding author:Xiong, H.
      (xhg1956@sohu.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:21-26
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to optimize the micro-lysimeters (MLS) and improve its measurement accuracy, influential elements of accuracy was studied by the field testing without changing soil in 15 days. Result showed that the accuracy of all test treatments was high. The highest point was up to 97.40%. Whether the inner cylinder was drilled or not did not affect obviously the measurement accuracy. The accuracy of the drilled outside cylinder was higher than the undrilled ones, and the drilled holes were better to be equally distributed. Further more, the holes number was less than 36 when the diameter was 3 mm. The sealed outside cylinder could lower the measurement accuracy. The thinner material of sealed inside cylinder was and the more ventilative function was, the higher accuracy could be achieved. Moreover, when the space between inside and outside cylinder was smaller, the measurement accuracy also became higher. Dew studying results indicated that dew at night could markedly lower measurement accuracy of MLS. When the condensed quantum was above soil evaporation, MLS could not accurately measure out soil evaporation. Meanwhile, the measurement accuracy varied from time to time. The soil water content in the first 3 days was more, but the accuracy of MLS was lower than the later days. If there was available water supply, it was practicable without changing the MLS soil in 15 days.
Number of references:16
Main heading:Soil surveys
Controlled terms:Cylinders (shapes) - Evaporation - Lysimeters - Measurements - Moisture determination - Soil moisture - Soil testing - Underwater soils - Water content - Water supply
Uncontrolled terms:Available water - Dew - Drilled holes - Field experiment - Field testing - Influencing factor - Inner cylinder - Measurement accuracy - Soil water content - Space between
Classification code:944.2 Moisture Measurements - 802.3 Chemical Operations - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 943.3 Special Purpose Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 631.1 Fluid Flow, General - 471.1 Oceanography, General - 446.1 Water Supply Systems - 444 Water Resources - 408.2 Structural Members and Shapes - 406.2 Roads and Streets - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2010.05.004
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 28>
Accession number:20102713062800
Title:Photovoltaic grid-connected inverter with current tracking control based on Takagi-Sugeno fuzzy model
Authors:Yu, Rongrong (1); Wei, Xueye (1); Qin, Qingnu (1); Wu, Xiaojin (1)
Author affiliation:(1) Beijing Jiaotong University, Beijing 100044, China
Corresponding author:Yu, R.
      (yrr829@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:240-245
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:Inverter which is essential in the photovoltaic grid-connected generation system faces an important problem that is how to adjust PWM (pulse width modulation) control signals to output current keeping sinusoidal and in phase with grid voltage. This paper proposes a new kind of method to solve the problem effectively. Firstly various kinds of control algirithms used in photovoltaic grid-connected inverter are compared, and then the function between duty cycle and several measurable variables such as grid voltage and current error is generated. Based on this function a complete method to produce PWM control signals under Takagi-Sugeno fuzzy controller is proposed. This method adopts 4-input and 2-output structure. Four variables of grid voltage, current error, reference current and its differential are taken as input. After processed under Takagi-Sugeno fuzzy controller, control signals of the four switches are obtained as output. Via anti-fuzzy interface duty cycles of the two groups of control signals are achieved. At the end of this paper the principle of a single phase full-bridge inverter is illustrated. Through simulation analysis it can be seen that compared with traditional hysteresis control the proposed method has advantages in terms of low switch frequency, simple hardware structure, small THD and so on. It feeds power to the utility with unity power factor.
Number of references:16
Main heading:Mesh generation
Controlled terms:Controllers - Electric power factor correction - Fuzzy control - Pulse width modulation
Uncontrolled terms:Control signal - Current error - Current tracking control - Duty cycles - Full-bridge inverters - Fuzzy interface - Generation systems - Grid connected inverters - Grid voltage - Grid-connected  - Hardware structures - Hysteresis control - In-phase - Measurable variables - Output current - PWM control - Reference currents - Simulation analysis - Single phase - Switch frequency  - Takagi Sugeno fuzzy models - Takagi-Sugeno fuzzy controllers - Takagi-Sugeno fuzzy model - Unity power factor
Classification code:921 Mathematics - 732.1 Control Equipment - 731 Automatic Control Principles and Applications - 723.5 Computer Applications - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 723.4 Artificial Intelligence - 706 Electric Transmission and Distribution - 703.1 Electric Networks - 701.1 Electricity: Basic Concepts and Phenomena - 716 Telecommunication; Radar, Radio and Television
DOI:10.3969/j.issn.1002-6819.2010.05.041
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 29>
Accession number:20102713062779
Title:Relationship between mechanical property and damage of tomato during robot harvesting
Authors:Li, Zhiguo (1); Liu, Jizhan (1); Li, Pingping (1)
Author affiliation:(1) Institute of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Li, P.
      (Lipingping@ujs.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:112-116
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The mechanical property and damage of tomato were studied by the loading-unloading orthogonal test in order to reduce the gripped damage during robot harvesting. The factors included loading position, probe type, finger material, compressibility and loading rate. The results showed that the compressibility had the most significant effect among five mechanical parameters. Additionally, it had correlation between the mechanical parameters. When the compressibility increased by 1%, the average value of strain energy, plastic strain energy, peak force and loading slope raised 26.16 mJ, 19.04 mJ, 4.62 N and 0.16 N/mm respectively while the average value of degree of elasticity decreased by 0.88%. The factors which had significant effects on the mechanical damage of tomato were ordered as compressibility, sphericity, loading position and rate. The average value of degree of mechanical damage raised 2.89% as the compressibility increased by 1%. The regression coefficient between the mechanical properties and the degree of mechanical damage of tomato was 0.7214. The peak force had the most significant relationship with the degree of mechanical damage. This will provide some theory evidences for the design of grip system and the implement of stable gripping-control strategy in harvesting robot.
Number of references:21
Main heading:Mechanical properties
Controlled terms:Compressibility - Fruits - Harvesting - Loading - Loads (forces) - Machine design - Parameter extraction - Robots - Strain energy - Unloading
Uncontrolled terms:Average values - Control strategies - Finger materials - Harvesting robot - Loading rate - Locule number - Mechanical damage - Mechanical damages - Mechanical parameters - Orthogonal test  - Peak force - Plastic strain energy - Regression coefficient
Classification code:731.5 Robotics - 731.6 Robot Applications - 821.3 Agricultural Methods - 723.5 Computer Applications - 821.4 Agricultural Products - 931.1 Mechanics - 951 Materials Science - 922 Statistical Methods - 723.2 Data Processing and Image Processing - 421 Strength of Building Materials; Mechanical Properties - 601 Mechanical Design - 663.1 Heavy Duty Motor Vehicles - 408 Structural Design - 671.2 Ship Equipment - 674.1 Small Marine Craft - 691.2 Materials Handling Methods - 672 Naval Vessels
DOI:10.3969/j.issn.1002-6819.2010.05.019
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 30>
Accession number:20102713062794
Title:Nondestructive measurement of moisture content of green tea in primary processing based on diffuse reflectance spectroscopy
Authors:Li, Xiaoli (1); Cheng, Shuxi (1); He, Yong (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
Corresponding author:He, Y.
      (yhe@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:5
Issue date:May 2010
Publication year:2010
Pages:195-201
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Moisture content of tea is an important index affecting processing quality of tea. To realize fast measurement of moisture content of tea in processing, this paper put forward a nondestructive way to measure moisture content of green tea in primary processing based on diffuse reflectance spectroscopy technique. A visible-near infrared (Vis/NIR) spectroradiometer was adopted for scanning diffuse reflectance spectra of 568 samples in the range of 325-1 075 nm wavelengths. These samples were from eight procedures in primary processing, moisture contents of samples were immediately measured after spectral scanning. For obtaining high-dimension spectral data, wavelet transform (WT) was used to reduce of dimensionality and extraction of wavelet coefficients. The capability of low-frequency wavelet coefficients was evaluated for extracting spectral characteristic, and the result indicated that it was effective to mine characteristic information from spectra by wavelet transform. Three regression algorithms including partial least square (PLS), artificial neural network and least square support vector machine (LS-SVM) were used to develop models for determination of moisture content respectively. It could be found that LS-SVM model obtained the optimal result with r<inf>c</inf> =0.9985 and r<inf>v</inf> =0.9875. These results indicated that it is feasible to measure moisture content of green tea nondestructively and fast based on diffuse reflectance spectroscopy, WT is an effective method for extraction of characteristic from spectra, and LS-SVM algorithm can be broadly used for regression analysis with high precision and strong generalization.
Number of references:22
Main heading:Moisture determination
Controlled terms:Infrared devices - Infrared spectroscopy - Metadata - Moisture - Near infrared spectroscopy - Neural networks - Reflection - Regression analysis - Support vector machines - Wavelet transforms
Uncontrolled terms:Artificial Neural Network - Diffuse reflectance spectroscopy - Diffuse reflectance spectrum - Extraction of characteristics - Fast measurement - Green tea - High precision - Least square support vector machines - Low frequency - Moisture content  - Moisture contents - Near Infrared - Non destructive - Non-destructive measurement - Optimal results - Partial least squares - Primary processing - Processing quality - Regression algorithms - Spectral characteristics  - Spectral data - Spectral scanning - Spectro-radiometers - Support vector machine (SVM) - SVM algorithm - SVM model - Wavelet coefficients
Classification code:801.4 Physical Chemistry - 921.3 Mathematical Transformations - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 941.4 Optical Variables Measurements - 944.2 Moisture Measurements - 801 Chemistry - 443.1 Atmospheric Properties - 461.1 Biomedical Engineering - 711 Electromagnetic Waves - 723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.3969/j.issn.1002-6819.2010.05.034
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 31>
Accession number:20102713062774
Title:Runoff and sediment yield characteristics of earth road under artificial rainfall and simulated overland flow tests conditions in Loess Plateau
Authors:Zhang, Qiang (1); Zheng, Shiqing (2); Tian, Fengxia (3); Ma, Chunyan (2)
Author affiliation:(1) Environment College, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Institute of Soil and Water Conservation, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) Ministry of Education Key laboratory of Western China's Environment System, Lanzhou University, Lanzhou 730000, China
Corresponding author:Zheng, S.
      (zheng_shiqing@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:83-87
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:An artificial rainfall and simulated overland flow test was conducted to study runoff and sediment yield process and hydraulic characteristics of uncovered earth road and grass-covered earth road in order to decrease soil and water loss on grass-covered earth road surface. Total runoff and sediment yield decreased 3.94%-25.10% and 9.65%-45.69% respectively of grass-covered earth road compared with uncovered earth road. At same flow rate, grass-covered earth road had lower soil erosion rate, runoff velocity and unit energy of water-carry section. Darcy-weisbach resistance coefficient and Manning roughness coefficient of grass-covered earth road was 2.62-9.00 times higher and 1.74-3.53 times higher respectively than that of uncovered earth road. Because of its lower runoff velocity and unit energy of water-carrying section, higher road surface roughness coefficient and runoff resistance coefficient, grass-covered earth road had a lower sediment yield and could decreased sediment transport. The study provides theoretical support for decreasing uncovered earth road erosion and paving grass-covered earth road.
Number of references:18
Main heading:Roads and streets
Controlled terms:Hydraulics - Rain - Runoff - Sediment transport - Sedimentology - Soil mechanics - Soil testing - Soils - Surface roughness
Uncontrolled terms:Artificial rainfall - Hydraulic characteristic - Loess Plateau - Manning Roughness Coefficient - Overland flow - Resistance coefficients - Road erosion - Road surface roughness - Road surfaces - Runoff resistance  - Runoff velocity - Sediment yields - Soil and water loss - Soil erosion rate
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 632.1 Hydraulics - 631.3 Flow of Fluid-Like Materials - 483.1 Soils and Soil Mechanics - 481.1 Geology - 444.1 Surface Water - 443.3 Precipitation - 442.1 Flood Control - 406.2 Roads and Streets
DOI:10.3969/j.issn.1002-6819.2010.05.014
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 32>
Accession number:20102713062806
Title:Effect of spraying conditions on dermal exposures
Authors:Chi, Mingmei (1); Song, Jianli (2); Zeng, Aijun (2); Liu, Yajia (2); Song, Weitang (2); Zhang, Luda (2); He, Xiongkui (2)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) College of Science, China Agricultural University, Beijing 100193, China
Corresponding author:He, X.
      (xiongkui@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:5
Issue date:May 2010
Publication year:2010
Pages:276-282
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:This is mainly about the research on dermal exposures and primary spraying conditions influencing dermal exposures during spraying applications with the knapsack sprayer (3WS-16) and the motorized knapsack sprayer (WFB-18AC) in summer when the temperature was high. The results indicated that right hand, left hand, right upper arm and right forearm were more polluted with knapsack sprayers, while the correspondence parts were left upper arm and left forearm with power sprayers; There were highly linear correlation between the major pollutions and the secondary pollutions; Dermal exposures were affected by sprayer, nozzle flow, operating environments, crop conditions and spraying mode; And the wind and crop height were primary influence factors after the single factor interactions. The results were availability in practice application of improving the spraying technology and reducing dermal exposures.
Number of references:16
Main heading:Reliability analysis
Controlled terms:AC generator motors - Cluster analysis - Crops - Discriminant analysis - Pesticides - Quality assurance - Regression analysis - Spray nozzles
Uncontrolled terms:Canonical correlations - Crop condition - Crop height - Dermal exposure - Influence factors - Linear correlation - Nozzle flow - Operating environment - Secondary pollution - Spraying modes  - Spraying technology - Upper arm
Classification code:922.2 Mathematical Statistics - 922 Statistical Methods - 913.3 Quality Assurance and Control - 913 Production Planning and Control; Manufacturing - 903.1 Information Sources and Analysis - 821.4 Agricultural Products - 821.2 Agricultural Chemicals - 803 Chemical Agents and Basic Industrial Chemicals - 723 Computer Software, Data Handling and Applications - 705.3.1 AC Motors - 705.2.1 AC Generators - 631.1 Fluid Flow, General - 422.2 Test Methods
DOI:10.3969/j.issn.1002-6819.2010.05.047
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 33>
Accession number:20102713062792
Title:Models for estimation of grassland production and spatial inversion based on MODIS data in Songnen Plain
Authors:Luo, Ling (1); Wang, Zongming (1); Ren, Chunying (1); Song, Kaishan (1); Li, Xiaoyan (4)
Author affiliation:(1) Institute of Northeast Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (3) Graduate University, Chinese Academy of Sciences, Beijing 100039, China; (4) Earth Science Collage, Jilin University, Changchun 130061, China
Corresponding author:Wang, Z.
      (zongmingwang@gmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:182-187
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Using NASA/MODIS data to calculate NDVI, RVI, MSAVI and EVI four vegetation indexes, combining grass production(green weight)data, by means of statistical methods, estimation models of grass production in Songnen Plain were established, for the sake of estimating yield of grass reasonably and regulating grassland resources. With the correlation analysis, it was found that all of the four prophase and synchronous vegetation indexes were correlated with grass production(green weight)significantly, among them NDVI had the highest correlation coefficient and EVI the lowest. The best estimation model of grass production in Songnen Plain was S curve model based on NDVI, with estimation accuracy 78%. Calculating yield of grass in Songnen Plain through the best estimation model, total fresh yield was 18850 thousand tons, equivalent to 5890 thousand tons of hay, and fresh weight per unit area was 5717 kg/hm², equaling to 1687 kg/hm² of dry weight. Total fresh yield belong to Heilongjiang Province was 13560 thousand tons, equivalent to 4240 thousand tons of hay, and yield of fresh grass and hay belong to Jilin Province was 5310 and 1660 thousand tons separately. Using vegetation indexes to predicting future sixteen days' grass yield was proved nice, and the prediction accuracy of exponential model based on NDVI was 74%. The research shows that it is feasible to study grass production of Songnen Plain with vegetation indexes.
Number of references:17
Main heading:Estimation
Controlled terms:Radiometers - Remote sensing - Vegetation
Uncontrolled terms:Correlation analysis - Correlation coefficient - Dry weight - Estimation models - Exponential models - Fresh weight - Grassland in Songnen Plain - Grassland resource - Jilin Province - MODIS  - Per unit - Prediction accuracy - S-curve model - Songnen plain - Vegetation index
Classification code:461.9 Biology - 525.1 Energy Resources and Renewable Energy Issues - 731.1 Control Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics - 944.7 Radiation Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2010.05.032
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 34>
Accession number:20102713062784
Title:Analysis of statics of solar auto-tracking system and simulation of fluctuating wind
Authors:Zhang, Qixun (1); Yu, Haiye (1)
Author affiliation:(1) College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China; (2) Key Laboratory of Bionic Engineering Ministry of Education, Jilin University, Changchun 130025, China
Corresponding author:Yu, H.
      (haiye@jlu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:137-141
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A finite element analysis (FEA) was built using the software ANSYS. The model was used to perform the composite structures, as well as the mechanism overall statics simulation analysis. Meanwhile, a simulation of fluctuating wind effect on the system was conducted based on the theory of transient dynamics. The simulation analysis of the mechanism and the solution programs were introduced in detail. The composite structure and mechanism overall statics simulation results provides the evidence that the mechanism has met the design requirements. Moreover, the FEA results indicated that the frequency generated by the fluctuating wind was less than natural frequencies. As a result, the resonance will not happen for the mechanism. After comparing the results of the two simulations, it was found that fluctuating wind effect on mechanism has a greater impact.
Number of references:15
Main heading:Transient analysis
Controlled terms:Composite structures - Computer simulation - Finite element method - Machine design - Static analysis - Structure (composition) - Wind effects
Uncontrolled terms:ANSYS - Auto tracking - Design requirements - Finite element analysis - Fluctuating wind - Simulation analysis - Simulation result - Software ANSYS - Transient dynamics
Classification code:921.6 Numerical Methods - 731.1 Control Systems - 723.5 Computer Applications - 723.1 Computer Programming - 703.1 Electric Networks - 951 Materials Science - 621 Nuclear Reactors - 443.1 Atmospheric Properties - 415 Metals, Plastics, Wood and Other Structural Materials - 408.2 Structural Members and Shapes - 408.1 Structural Design, General - 601 Mechanical Design
DOI:10.3969/j.issn.1002-6819.2010.05.024
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 35>
Accession number:20102713062818
Title:Effects of microwave treatment of raw apple on browning of apple juice
Authors:Zhang, Shaoying (1); Wang, Xiangdong (1); Yu, Youwei (1); Guo, Huanxia (2)
Author affiliation:(1) College of Engineering, Shanxi Normal University, Linfen 041004, China; (2) Yuncheng Haisheng Fresh Fruit Juice Company Limited, Yuncheng 044000, China
Corresponding author:Wang, X.
      (wxdnew@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:347-351
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:In order to investigate the relationship between microwave pretreatment of raw apple and browning of apple juice, the effects of different microwave power and time treatment on the browning of apple juice during apple juice processing were studied. The results indicated that microwave treatment could improve the color value, reduced the activity of polyphenol oxidase and the content of total amino-nitrogen, and slightly increased the acidity of apple juice. With the microwave power of 720-900 W and time of 75-125 s, the color value of apple juice was higher, after 45 days storage at room temperature, with the microwave power of 900 W and time of 100 s, the color value of apple juice was 67.8 (91.5% higher than the control). Microwave pretreatment of raw apple to prevent the browning of apple juice is a simple, safe, feasible and economical processing method.
Number of references:21
Main heading:Fruits
Controlled terms:Color - Fruit juices - Microwave generation - Microwave heating - Microwave power transmission - Nitrogen - Processing - Radio waves
Uncontrolled terms:Apple juice - Browning - Color value - Color values - Microwave power - Microwave pretreatment - Microwave treatment - Polyphenol oxidase - Processing method - Room temperature
Classification code:913.4 Manufacturing - 822.3 Food Products - 821.4 Agricultural Products - 804 Chemical Products Generally - 741.1 Light/Optics - 716.3 Radio Systems and Equipment - 714.2 Semiconductor Devices and Integrated Circuits - 714.1 Electron Tubes - 713.2 Oscillators - 711.1 Electromagnetic Waves in Different Media - 711 Electromagnetic Waves - 706.1.1 Electric Power Transmission - 642.1 Process Heating
DOI:10.3969/j.issn.1002-6819.2010.05.059
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 36>
Accession number:20102713062785
Title:Application of LMS algorithm in road simulation shaking table based on rapid prototyping of xPC
Authors:L&#252;, Meilei (1); Xu, Zibin (2)
Author affiliation:(1) Department of Information and Electrical Engineering, West Branch of Zhejiang University of Technology, Quzhou 324000, China; (2) Center of Modern Education Technology, Zhejiang Shuren University, Hangzhou 310015, China
Corresponding author:L&#252;, M.
      (meilei_lv@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:142-147
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the acceleration waveform replication tracking accuracy of road simulation shaking table, this paper presented an adaptive filter LMS (least mean square) algorithm as a feed-forward unit of servo control system in the shaking table. LMS adaptive algorithm was used to tune adaptively the weight of the FIR (finite impulse response) digital filter, as well as to adjust the parameters of the feed-forward controller to reduce the tracking error of acceleration waveform replication. A mathematical model on road simulation shaking table of single channel was built, and control system was simulated using PID (proportional integral derivative) and LMS controllers. These simulation results indicated that the acceleration waveform replication accuracy with proposed control strategy was superior to conventional PID controller. Finally, this paper represented the implementation of a rapid prototyping control system, using Matlab/Simulink blocksets to setup the Simulink model of road simulation shaking table with xPC Target. Therefore, the control system of road simulation shaking table based on adaptive LMS algorithm was designed and the effectiveness of the proposed control strategy was verified via these experimental results. A good performance of the proposed control strategy was achieved in experiments, and it can be successfully applied to the road simulation shaking table system for acceleration waveform replication.
Number of references:16
Main heading:Adaptive control systems
Controlled terms:Adaptive algorithms - Adaptive filters - Computer simulation - Concurrent engineering - Controllers - Dynamic models - Fuzzy control - Impulse response - Job analysis - Pneumatic control equipment  - Proportional control systems - Rapid prototyping - Real time control - Roads and streets - Two term control systems
Uncontrolled terms:Acceleration waveform - Control strategies - Feed-Forward - Feed-forward controllers - Finite-impulse response - Least mean squares - LMS algorithms - MATLAB /simulink - PID controllers - Proportional integral derivatives  - Servo control systems - Shaking tables - Simulation result - Simulink models - Single channels - Tracking accuracy - Tracking errors - xPC target
Classification code:921 Mathematics - 731.1 Control Systems - 732 Control Devices - 732.1 Control Equipment - 912 Industrial Engineering and Management - 913.1 Production Engineering - 913.6 Product Development; Concurrent Engineering - 731 Automatic Control Principles and Applications - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 632.4 Pneumatic Equipment and Machinery - 408.1 Structural Design, General - 406.2 Roads and Streets - 723.5 Computer Applications
DOI:10.3969/j.issn.1002-6819.2010.05.025
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 37>
Accession number:20102713062763
Title:Anti-clogging experimental investigation and optimized design of micro-channels of emitter based on isoline of sand content
Authors:Niu, Wenquan (1); Wu, Pute (1); Yu, Liming (1)
Author affiliation:(1) National Research Center of Water Saving Irrigation, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Institute of Soil and Water Conservation, Chinese Academy of Sciences/Ministry of Water, 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:5
Issue date:May 2010
Publication year:2010
Pages:14-20
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Emitter with tooth-labyrinth paths was main research subject. The distribution law of sand content and hydraulic performance of emitter were analyzed by CFD (computational fluid dynamics) two-phase simulation technology firstly. The optimal design method of labyrinth paths was proposed that the lesser isoline of sand content was regarded as the borderline of labyrinth paths. According to the results of two-phase CFD simulation on the optimal structure, the sand content of labyrinth paths by optimized was more uniform than before, the phenomenon of a large number of solid particles concentrated on the surface near the entrance and exit of labyrinth paths was basically eliminated, the anti-clogging performance of emitter was significantly improved. Secondly, based on optimized structure, a standardization optimized structure was designed, the prototype structure emitters and the standardization optimized emitters were produced by mould. Finally, hydraulic performance of tooth-labyrinth paths and distribution of sand were tested by combined CFD simulation and period clogging experiment. Accuracy of sand distribution with CFD simulation was tested with short period clogging experiment. The results showed that the emitter by anti-clogging optimal design with the lesser isoline of sand content as the borderline of labyrinth paths maintained the previous excellent hydraulic performance, its anti-clogging performance was significantly improved from prototype structure, the life was twice as prototype structure.
Number of references:17
Main heading:Computational fluid dynamics
Controlled terms:Computer simulation - Dentistry - Design - Experiments - Fluid dynamics - Fluids - Hydraulics - Leakage (fluid) - Optimal systems - Sand  - Standardization - Structural optimization - Two phase flow
Uncontrolled terms:CFD (computational fluid dynamics) - CFD simulations - Distribution law - Experimental investigations - Hydraulic performance - Labyrinth micro-channel - Optimal design - Optimal design methods - Optimal structures - Optimized designs  - Optimized structures - Prototype structures - Research subjects - Sand content - Sand distribution - Short periods - Solid particles - Two-phase simulation
Classification code:631.1.2 Gas Dynamics - 632.1 Hydraulics - 723.5 Computer Applications - 731.1 Control Systems - 901.3 Engineering Research - 961 Systems Science - 902.1 Engineering Graphics - 921.5 Optimization Techniques - 921.6 Numerical Methods - 931.1 Mechanics - 932.2 Nuclear Physics - 902.2 Codes and Standards - 631.1.1 Liquid Dynamics - 631.1 Fluid Flow, General - 408 Structural Design - 452.1 Sewage - 452.3 Industrial Wastes - 461.1 Biomedical Engineering - 461.6 Medicine and Pharmacology - 462.3 Dental Equipment and Supplies - 483.1 Soils and Soil Mechanics - 505 Mines and Mining, Nonmetallic - 619.1 Pipe, Piping and Pipelines - 631 Fluid Flow
DOI:10.3969/j.issn.1002-6819.2010.05.003
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 38>
Accession number:20102713062765
Title:Effect of irrigation with saline water on water-salt dynamic and spring wheat yield
Authors:Wang, Shijing (1); Huang, Guanhua (1); Yang, Jianguo (3); Wang, Jun (1); Tai, Rikun (1); Meng, Lingguang (1)
Author affiliation:(1) College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) Chinese-Israeli International Center for Research and Training in Agriculture, Beijing 100083, China; (3) Institute of Agricultural Resources and Environment, Ningxia Academy of Agro-forestry Science, Yinchuan 750004, China
Corresponding author:Huang, G.
      (ghuang@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:5
Issue date:May 2010
Publication year:2010
Pages:27-33
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To obtain the suitable alternative of saline water irrigation for spring wheat, a field experiment was conducted in Huinong Irrigation District, Ningxia, North-West China in 2007 and 2008 respectively. The collected datum were used to analyze the effects of saline water irrigation on water-salt dynamics and yield of spring wheat. Results indicated that soil water content and salinity at the upper layer of 0-30 cm had relatively large variations, whereas the variations of soil water content and soil salinity in layers below 30 cm were relatively small. Canal irrigation resulted in the desalination of root zone soils, while well-canal combined irrigation kept the salinity in root zone soils being stable even at relatively dry years, but irrigation with well water caused a significant salt accumulation in root zone soils. Evapotranspiration and water use efficiency of spring wheat decrease with the increase of irrigation water mineralization degree. Compared with Canal irrigation, the well-canal combined irrigation only led to a slight decrease of crop yield, whereas a 20%-30% decrease of crop yield was caused by the well irrigation. The alternative with 1:1 ratio of ground water to surface water is recommended for irrigation of spring wheat in Yinbei Huinong Irrigation District.
Number of references:19
Main heading:Saline water
Controlled terms:Crops - Desalination - Groundwater - Hydraulic structures - Irrigation - Salinity measurement - Soil moisture - Underwater soils - Water content - Water filtration  - Water supply
Uncontrolled terms:Canal irrigation - Crop yield - Field experiment - Irrigation districts - Irrigation waters - Root zone - Soil salinity - Soil water content - Spring wheat - Upper layer  - Water use efficiency - Well water - West China - Yield
Classification code:471.4 Seawater, Tides and Waves - 483.1 Soils and Soil Mechanics - 611 Hydroelectric and Tidal Power Plants - 802.3 Chemical Operations - 821.3 Agricultural Methods - 821.4 Agricultural Products - 943.3 Special Purpose Instruments - 471.1 Oceanography, General - 407.2 Waterways - 441 Dams and Reservoirs; Hydro Development - 444 Water Resources - 444.2 Groundwater - 445.1 Water Treatment Techniques - 446.1 Water Supply Systems - 446.2 Related Hydraulic Structures
DOI:10.3969/j.issn.1002-6819.2010.05.005
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 39>
Accession number:20102713062770
Title:Virtual water theory and its application in food security
Authors:Lu, Shibao (1); Huang, Qiang (1); Ma, Kai (1); Zhang, Yongyong (1)
Author affiliation:(1) Institute of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author:Huang, Q.
      (sy-sj@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:5
Issue date:May 2010
Publication year:2010
Pages:59-64
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:Virtual water means all water resource consumed in the process of commodity production and service. From virtual water strategy, the country or region, who is in lack of water, could obtain the necessary water resource by means of trade in order to stabilize the economic sustainable development for this region. This thesis gave emphasis to introduce the calculation method of virtual water for farm crops and stock raising. Through actual examples appearing in farm production of four provinces in central part of China, this thesis pointed out that virtual water strategy could be regarded as a back-up proposal to solve water resource shortage, and virtual water could be collocated globally by virtual water trade. As a kind of regulating method, the virtual water strategy could increase the water supply for the region in lack of water so as to maintain the regional or national security in the view of water resource and food security. Hereby, virtual water possesses the important theoretic and practical significance for optimum arrangement of water resource and food security production.
Number of references:31
Main heading:Water resources
Controlled terms:Commerce - Crops - Food products - Neural networks - Sensitivity analysis - Strategic planning - Water supply
Uncontrolled terms:Calculation methods - Farm production - Food security - National security - Virtual water - Virtual water trade - Water scarcity
Classification code:921 Mathematics - 912.2 Management - 911.4 Marketing - 911.2 Industrial Economics - 822.3 Food Products - 821.4 Agricultural Products - 731.1 Control Systems - 723.4 Artificial Intelligence - 461.1 Biomedical Engineering - 446.1 Water Supply Systems - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.05.010
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 40>
Accession number:20102713062810
Title:Three-dimensional visualization of farmland consolidation planning based on GIS
Authors:Li, Ruipu (1); Lu, Xinhai (1); Ma, Caixue (2)
Author affiliation:(1) Land Resources and Real Estate Research Center, Huazhong University of Science and Technology, Wuhan 430074, China; (2) School of Land Resource Management, Huazhong Agriculture University, Wuhan 430070, China
Corresponding author:Lu, X.
      (xinhailu@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:302-305
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 farmland consolidation is a way to improve quantity and quality of arable land in China currently, and it is also a way to coordinate the relationship between human beings and land resources and to deal with the conflicts between them. It combines GIS with farmland consolidation in order to explore a new method of three-dimensional visualization on such programs. Methods of system analysis and empirical analysis were employed, and it took the farmland consolidation planning in Xiongji Country, Zaoyang City, Hubei Province as an example. This paper built up a DEM by elevation points and created a three-dimensional landscape of land use status by overlaying with DOM after inspecting its quality. It also demonstrated the methods to built models of farmland water conservancy, roads and others by GIS, and thus obtained the three-dimensional visualization of land consolidation planning. It concludes that space technology such as GIS will enhance the farmland consolidation planning efficiency, and its application on this item can facilitate the feasibility argumentation before the project is to be constructed.
Number of references:14
Main heading:Three dimensional
Controlled terms:Digital instruments - Farms - Geographic information systems - Geomorphology - Information systems - Land use - Surveying - Visualization
Uncontrolled terms:Arable land - Arable land consolidation - Digital elevation model - Planning and design - Three dimension - Three dimensions
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 902.1 Engineering Graphics - 903.2 Information Dissemination - 903.3 Information Retrieval and Use - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723.3 Database Systems - 481.1.1 Geomorphology - 442.2 Land Reclamation - 405.3 Surveying - 403 Urban and Regional Planning and Development - 723.5 Computer Applications
DOI:10.3969/j.issn.1002-6819.2010.05.051
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 41>
Accession number:20102713062805
Title:Effects of different fertilizer levels on N<inf>2</inf>O flux from protected vegetable land
Authors:Zhang, Zhongxin (1); Li, Yu'e (2); Hua, Luo (1); Wan, Yunfan (2); Jiang, Ningning (1)
Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing 100037, China; (2) Institute of Environment and Sustainable Develop in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Corresponding author:Li, Y.
      (yueli@ami.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:269-275
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To identify the characteristics of N<inf>2</inf>O emission from protected vegetable land in Beijing, and to seek a way that decreases N<inf>2</inf>O emission and increase or keep cucumber yield, with the method of static chamber-gas chromatograph technique, N<inf>2</inf>O emission was monitored in cucumber field from protected vegetable land in Beijing. The effects of different amounts of fertilization on N<inf>2</inf>O emission, vegetable yields and economic benefit were analyzed. The results showed that significant temporal variability of N<inf>2</inf>O flux from all treatments was observed in different growing stages of cucumber. Larger emission happened at the initial stage of the experiment. N<inf>2</inf>O emission decreased and remained stable with time. At the late stage, a peak emission happened and continued for a long time because of larger amount of top dressing. The order of total N<inf>2</inf>O emission was: T4 (conventional fertilization + chicken dug, in short "CF+CD") &gt; T3 (3/4CF+CD) &gt; T1 (1/4CF+CD) &gt; T2 (1/2CF+CD) &gt; Tn (CD) &gt; T0 (Control treatment), and there existed significant difference between treatments. By considering fertilizer rates, N<inf>2</inf>O emission and cucumber yield, it was concluded that the fertilization rate of T3 (3/4CF+CD) was very reasonable, which could provide basis for applying fertilizer rationally, reducing farm production costs, estimating greenhouse gas emissions from cropland and compiling national greenhouse gases emission inventory.
Number of references:40
Main heading:Gas emissions
Controlled terms:Cost reduction - Data storage equipment - Emission control - Fertilizers - Global warming - Greenhouse gases - Greenhouses - Vegetables
Uncontrolled terms:Economic benefits - Emission factor - Emission factors - Farm production - Fertilization rates - Fertilizer levels - Fertilizer rates - Gas chromatographs - Greenhouse gases emissions - Initial stages  - Late stage - Peak emissions - Static chambers - Temporal variability
Classification code:912.2 Management - 911.2 Industrial Economics - 821.6 Farm Buildings and Other Structures - 821.4 Agricultural Products - 821.2 Agricultural Chemicals - 804.1 Organic Compounds - 804 Chemical Products Generally - 722.1 Data Storage, Equipment and Techniques - 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.1002-6819.2010.05.046
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 42>
Accession number:20102713062811
Title:Potential impact of urban planning on cultivated land protecting in Hangzhou Bay area in Zhejiang Province
Authors:Ren, Liyan (1); Yue, Wenze (2); Wu, Cifang (2)
Author affiliation:(1) Faculty of Architectural Civil Engineering and Environment, Ningbo University, Ningbo 315211, China; (2) College of Public Administration, Zhejiang University, Hangzhou 310029, China
Corresponding author:Ren, L.
      (renliyan@nbu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:306-311
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on GIS spatial model and combination of land use data, urban planning data and farmland grading data, the potential urban sprawling and the risk to cultivated lands in Hangzhou Bay area were analyzed. Results revealed that the study area was characterized by high quality and density cultivated lands, whereas the construction lands would expand 9.4 &times; 10⁴ hm² in this area from 2005 to 2020. Therefore, cultivated lands would decrease 7.1 &times; 10⁴ hm², which was the main source of new construction lands occupying 75% according to present urban planning. Cultivated lands with high quality would decrease largely and rapidly. In the total decreased area, cultivated lands ranking from 1 to 5 according to farmland grading were 67.5%, and those ranking 1 and 2 would decease 37.16% and 35.52% respectively from 2005 to 2020. Suggestions include that a quality assessment of the occupied cultivated lands is carried out with farmland grading, and urban planning is adjusted to reduce the impact of construction on cultivated lands to safeguard the ability of food production.
Number of references:21
Main heading:Urban planning
Controlled terms:Farms - Grading - Land use
Uncontrolled terms:Construction land - Construction land expansion - Cultivated lands - Food production - GIS-spatial models - Hangzhou Bay - High quality - New construction - Potential impacts - Quality assessment  - Study areas - Zhejiang Province
Classification code:403 Urban and Regional Planning and Development - 403.1 Urban Planning and Development - 442.2 Land Reclamation - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2010.05.052
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 43>
Accession number:20102713062793
Title:Prediction of spatial distribution of soil nutrients using terrain attributes and remote sensing data
Authors:Zhang, Sumei (1); Wang, Zongming (1); Zhang, Bai (1); Song, Kaishan (1); Liu, Dianwei (1); Li, Fang (1); Ren, Chunying (1); Huang, Jian (3); Zhang, Huilin (3)
Author affiliation:(1) Institute of Northeast Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, China; (2) Graduate University, Chinese Academy of Sciences, Beijing 100039, China; (3) Station of Soil and Fertilizer of Jilin Province, Changchun 130015, China
Corresponding author:Wang, Z.
      (zongmingwang@neigae.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:188-194
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The distribution of the soil organic matter and total nitrogen can provide reliable and useful information for sustainable land management and land use planning. In this study, regression Kriging with environmental predictors was used to predict the spatial distribution of soil nutrients (organic matter and total nitrogen) in Nong'an County, Jilin Province, Northeast China, considering the disadvantages of conventional geo-statistic methods. Terrain and vegetation indicators were chosen for regression Kriging including ten terrain attributes and one vegetation index. The results indicated that relative elevation (Hr), gradient (&beta;), roughness of terrain (QFD), rate of gradient (SOS) and NDVI had significant correlations with soil organic matter and total nitrogen. M and &Psi; had higher significant correlation with soil organic matter than those with total nitrogen. Relative elevation (Hr), gradient (&beta;), surface roughness (M), river dynamic index (&Omega;) and NDVI were the best predictors for describing soil nutrients in the study area for they described the regression equations most. In Nong'an County, the soil organic matter and total nitrogen distributed regularly from southeast to northwest, and the values were higher in the part of southeast. This distribution pattern was affected by terrain and vegetation factors synthetically, and it had a significant relationship with soil type. Precision assessment results showed that regression Kriging improved the accuracy significantly and it could be an effective method for evaluating the spatial distribution of soil properties.
Number of references:19
Main heading:Soil surveys
Controlled terms:Biogeochemistry - Biological materials - Geographic information systems - Geomorphology - Information systems - Land use - Landforms - Nitrogen - Nutrients - Organic compounds  - Planning - Regression analysis - Remote sensing - Size distribution - Soils - Spatial variables measurement - Surface roughness - Vegetation
Uncontrolled terms:Distribution patterns - Geo-statistics - Jilin Province - Land managements - Land Use Planning - Northeast China - Organic matter - Precision assessment - Regression equation - Regression-kriging  - Remote sensing data - River dynamics - Soil nutrients - Soil organic matters - Soil property - Soil types - Spatial distribution - Statistic method - Study areas - Terrain attributes  - Total nitrogen - Vegetation index
Classification code:943.2 Mechanical Variables Measurements - 821.2 Agricultural Chemicals - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 804 Chemical Products Generally - 801.2 Biochemistry - 731.1 Control Systems - 822.3 Food Products - 903.3 Information Retrieval and Use - 912.2 Management - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids - 903.2 Information Dissemination - 723.3 Database Systems - 531.2 Metallography - 403 Urban and Regional Planning and Development - 406.2 Roads and Streets - 423 Non Mechanical Properties and Tests of Building Materials - 442.2 Land Reclamation - 454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 481.1 Geology - 481.1.1 Geomorphology - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 525.1 Energy Resources and Renewable Energy Issues
DOI:10.3969/j.issn.1002-6819.2010.05.033
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 44>
Accession number:20102713062786
Title:Simulation and experiment on agricultural chemical mixing process for direct injection system based on CFD
Authors:Xu, Youlin (1); Wang, Xiwei (1); Zheng, Jiaqiang (1); Zhou, Fengfang (1)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
Corresponding author:Xu, Y.
      (youlinxu@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:5
Issue date:May 2010
Publication year:2010
Pages:148-152
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:Mixers play a critical role in direct injection systems, ensuring the uniformity of the distribution in target areas of pesticide deposition. In order to determine the optimal design of a mixer, computational fluid dynamics (CFD) simulations were run on 4 variations of geometry model. The internal flow fields of the mixers were studied and compared by the CFD software, and the result showed that the design of the pipette in the back of the throat was the best. The result of verification tests with these 4 types of mixers on an in-house-made direct injection test bed well coincides with that of the simulation.
Number of references:11
Main heading:Computational fluid dynamics
Controlled terms:Agricultural chemicals - Agricultural machinery - Computational geometry - Equipment testing - Flow fields - Flow simulation - Fluid dynamics - Fluids - Mixers (machinery) - Mixing
Uncontrolled terms:CFD softwares - Computational fluid dynamics simulations - Direct injection - Geometry model - Internal flow field - Mixing process - Optimal design - Pesticide deposition - Verification tests
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 816.2 Plants and Machinery for Plastics and Other Polymers - 821.1 Agricultural Machinery and Equipment - 821.2 Agricultural Chemicals - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921.6 Numerical Methods - 931.1 Mechanics - 932.2 Nuclear Physics - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 804 Chemical Products Generally - 405.1 Construction Equipment - 601.1 Mechanical Devices - 631 Fluid Flow - 631.1 Fluid Flow, General - 803 Chemical Agents and Basic Industrial Chemicals - 631.1.1 Liquid Dynamics - 723.5 Computer Applications - 802.1 Chemical Plants and Equipment - 802.3 Chemical Operations - 631.1.2 Gas Dynamics
DOI:10.3969/j.issn.1002-6819.2010.05.026
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 45>
Accession number:20102713062823
Title:Properties and bonding mechanism of konjak powder - chitosan - PVA blending adhesive
Authors:Gu, Rong (1); Guo, Kangquan (1); Qi, Chusheng (1); Zhang, Jia (1); Liu, Zhao (1)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Shaanxi Engineering Research Center For Agricultural Equipment, Yangling 712100, China
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:5
Issue date:May 2010
Publication year:2010
Pages:373-378
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to enhance utilization value of konjak powder and develop environment-friendly wood adhesive, konjac glucomannan and chitosan were blended as main raw bonding materials with adding polyvinyl alcohols (PVA). Thermal characteristics of the blending adhesive were analyzed to determine the hot-pressing temperature parameters by differential scanning calorimetry (DSC). Then the orthogonal experiment was used to investigate the effects of the process parameters on the bonding strength of plywood. The bonding strength of plywood using the konjak powder - chitosan blending adhesive was compared with PVA and without PVA, and the microstructure of the blending adhesives were also analyzed by infrared spectroscopy (FTIR) and scanning electron microscope (SEM). Results showed that the plywood could reach the maximum value of bonding strength when the press temperature, press pressure, pressing time, and adhesive storage time was 130&deg;C, 4 MPa, 15 min and 24 h, respectively. FTIR showed that there existed the strong interaction of hydrogen bond among the three kinds of molecular. SEM observations indicated that the blending adhesive with PVA had the net-like structure so as to increase its whole bonding strength. These results could provide scientific basis for accelerating process of the development of environmentally friendly wood adhesive and improving the processing condition.
Number of references:14
Main heading:Bonding
Controlled terms:Adhesives - Blending - Chitin - Chitosan - Differential scanning calorimetry - Diffusion bonding - Experiments - Hot pressing - Hydrogels - Hydrogen bonds  - Infrared spectroscopy - Plywood - Polyvinyl alcohols - Presses (machine tools) - Scanning electron microscopy - Wood products
Uncontrolled terms:Accelerating process - Adhesives bonding - Bonding materials - Bonding mechanism - Bonding strength - Environment friendly - Environmentally-friendly - FTIR - Hot pressing temperature - Konjac glucomannan  - Konjak powder - Maximum values - Orthogonal experiment - Pressing time - Process parameters - Processing condition - Scanning electron microscopes - SEM observation - Storage time - Strong interaction  - Thermal characteristics - Wood adhesives
Classification code:804.2 Inorganic Compounds - 811.2 Wood and Wood Products - 812.1 Ceramics - 812.2 Refractories - 813 Coatings and Finishes - 944.6 Temperature Measurements - 815.1.1 Organic Polymers - 818.5 Rubber Products - 901.3 Engineering Research - 931.2 Physical Properties of Gases, Liquids and Solids - 941.4 Optical Variables Measurements - 817.1 Polymer Products - 804.1 Organic Compounds - 804 Chemical Products Generally - 415.3 Wood Structural Materials - 536.1 Powder Metallurgy Operations - 538.1 Metal Bonding - 603.1 Machine Tools, General - 641.1 Thermodynamics - 741.1 Light/Optics - 801 Chemistry - 801.3 Colloid Chemistry - 801.4 Physical Chemistry - 802.3 Chemical Operations
DOI:10.3969/j.issn.1002-6819.2010.05.064
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 46>
Accession number:20102713062789
Title:Effect of modified maize starch binder on the quality of seed tape twisting
Authors:Ren, Wentao (1); Dai, Lili (1); Cui, Hongguang (1); Xiang, Quanli (1)
Author affiliation:(1) College of Engineering, Shenyang Agricultural University, Shenyang 110866, China
Corresponding author:Ren, W.
      (renwentao1958@yahoo.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:164-169
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:In order to improve the tensile strength and the accuracy of hill distance of seed tape, and to prevent seed dropping during the process of seed tape twisting and during the direct sowing, this paper proposed a new approach which brushed binder on the inclusive materials and developed a binder with modified corn starch. Experiment results showed that the influence of modified maize starch binder and its dosage and viscosity on the emergence rate of rice seeds was indistinctively. By means of quadratic regression orthogonally rotational combination experiment, the effects of dosage and viscosity of the modified corn starch binder on the tensile strength of the seed tape, the accuracy of hill distance and the pass rate of the quantity per hill were studied respectively, and then the corresponding mathematical model were established. By the method of multi-objective nonlinear optimization, parameters of dosage and viscosity of the modified corn starch binder were optimized, then the optimal parameters combination was found out as following: the dosage of binder was 80% and the viscosity was 7792 mPa &middot s. Under this optimal conditions, the tensile strength of seed tape reached 18.84 N, coefficient of variation of drop-hill distance was 3.25%, and the pass rate of the quantity per hill got 91.05%. The results showed that brushing the modified corn starch binder on the inclusive materials played an important role in improving the seed tape tensile strength and the accuracy of hill distances during the process of seed tape twisting. Moreover, it had no influence on the emergency of rice seeds and environment. The results will offer an important reference to improve the designing of seed tape twisting machine.
Number of references:25
Main heading:Tensile strength
Controlled terms:Binders - Experiments - Mathematical models - Multiobjective optimization - Seed - Starch - Viscometers - Viscosity
Uncontrolled terms:Corn starch - Emergency rate - Modified corn starch - Pass rate - Pass rate of the quantity per hill
Classification code:943.3 Special Purpose Instruments - 821.4 Agricultural Products - 822.3 Food Products - 901.3 Engineering Research - 921 Mathematics - 921.5 Optimization Techniques - 931.2 Physical Properties of Gases, Liquids and Solids - 815.1.1 Organic Polymers - 803 Chemical Agents and Basic Industrial Chemicals - 631.1 Fluid Flow, General - 534.2 Foundry Practice - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 804.1 Organic Compounds
DOI:10.3969/j.issn.1002-6819.2010.05.029
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 47>
Accession number:20102713062767
Title:Water stress of winter wheat and irrigation strategy in typical region of Huang-Huai-Hai Plain
Authors:Liu, Ming (1); Wu, Jianjun (1); L&#252;, Aifeng (3); Zhao, Lin (1)
Author affiliation:(1) Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affair/Ministry of Education, Beijing 100875, China; (2) State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China; (3) Institute of Geographic Sciences and Natural Resources Research, China Academy of Sciences, Beijing 100101, China
Corresponding author:Wu, J.
      (wujj@ires.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:40-44
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:As the main agriculture area, Huang-Huai-Hai Plain is also one major water deficit region in China. Thus, reasonable and efficient irrigation plays an important role in Huang-Huai-Hai Plain. Using EPIC (environmental policy integrated climate) crop growth model, authors of this paper mainly simulated the growth of winter wheat in Cangzhou city of Hebei province, a typical regional area in Huang-Huai-Hai Plain. Through the simulation under the condition of no irrigation, the rule of water stress on the local climate condition was determined during the winter wheat growing season and four main water stress stages (tillering stage, green up stage, jointing stage and filling stage) were also derived. Then the crop growth under the condition of auto irrigation was simulated by changing the single irrigation Max (ATMX). Based on yield and water use efficiency (WUE), the irrigation strategy (Sowing stage: 10 mm, tillering stage: 40 mm, green up stage: 35 mm, jointing stage: 35 mm, filling stage: 10 mm) suitable for local conditions was acquired. It is proved that EPIC is a useful tool for agricultural management.
Number of references:28
Main heading:Irrigation
Controlled terms:Climate models - Computer simulation - Crops - Drought - Environmental protection - Plants (botany) - Scheduling - Water conservation - Water supply
Uncontrolled terms:Agricultural management - Crop growth - Crop growth model - Environmental policy - EPIC model - Filling stage - Growing season - Hebei Province - Irrigation scheduling - Local climate  - Local conditions - Regional areas - Water deficits - Water stress - Water-use efficiency - Winter wheat
Classification code:912.2 Management - 821.4 Agricultural Products - 821.3 Agricultural Methods - 723.5 Computer Applications - 461.9 Biology - 921 Mathematics - 454.2 Environmental Impact and Protection - 444 Water Resources - 443.3 Precipitation - 443 Meteorology - 403.1 Urban Planning and Development - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2010.05.007
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 48>
Accession number:20102713062815
Title:Microscopic structure changes of Japonica milled rice endosperm under typical simulating storage conditions
Authors:Zhou, Xianqing (1); Zhang, Yurong (2); Li, Lite (1)
Author affiliation:(1) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (2) School of Food Science and Technology, Henan University of Technology, Zhengzhou 450052, China
Corresponding author:Li, L.
      (llt@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:5
Issue date:May 2010
Publication year:2010
Pages:329-334
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 investigation of the endosperm structure changes of milled rice under storage, the quality changing mechanism was explored. Microscopic structure of the endosperm cross section, cell surface and starch granules of milled Japonica rice stored under the typical simulation grain storage conditions were analyzed using the Hitachi S3000N scanning electron microscope. The results showed that the radial arrangement tendency of Japonica rice endosperm cross section became blurred, and the starch cell rupture increased, especially in the center region of endosperm cell, with extending of the storage time and increase of temperature. Surface smoothness of endosperm cell decreased, the quantity and size of porosities increased, and the protein membranes of endosperm cell surface had an up wrap appearance and its thickness decreased to some degree. The exposed single starch granules became much more, and the fissure among starch granules rapidly increased, and the protein membranes covered with the surface of some complex starch granules had become blurred and rough. By analysis of the microscopic structure and morphological change of milled rice during storage and the changing mechanism of cooking properties and eating quality of rice, it is demonstrated that the main reason resulted from the rice quality changes during storage is the microscopic structure and morphological changes of rice endosperm, which will offer a theoretical basis for rice storage quality controlling.
Number of references:15
Main heading:Grain (agricultural product)
Controlled terms:Cell membranes - Granulation - Microscopic examination - Molecular structure - Morphology - Proteins - Quality control - Scanning - Scanning electron microscopy - Starch
Uncontrolled terms:Cell rupture - Cell surfaces - Cooking properties - Cross section - Eating quality - Endosperm cells - Grain - Grain storage - Hitachi - Japonica rice  - Microscopic structures - Milled rice - Morphological changes - Protein membrane - Quality change - Rice endosperm - Rice storage - Scanning Electron Microscope - Starch granules - Storage  - Storage condition - Storage structures - Storage time - Structure change - Surface smoothness - Theoretical basis
Classification code:951 Materials Science - 815.1.1 Organic Polymers - 821.4 Agricultural Products - 822.3 Food Products - 913.3 Quality Assurance and Control - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 804.1 Organic Compounds - 801.4 Physical Chemistry - 746 Imaging Techniques - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 461.2 Biological Materials and Tissue Engineering - 802.3 Chemical Operations
DOI:10.3969/j.issn.1002-6819.2010.05.056
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 49>
Accession number:20102713062816
Title:Modeling and numerical solution of eggplant freezing during freeze-drying process
Authors:Hao, Xinsheng (1); Guo, Yuming (1); Cui, Qinliang (1)
Author affiliation:(1) College of Engineering, Shanxi Agricultural University, Taigu 030801, China
Corresponding author:Guo, Y.
      (guoyuming99@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:335-341
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:Taking the research object of eggplant spherical samples, the modeling and numerical solution to the pre-freezing process of fruits and vegetables were studied. The non-steady-state mathematical model of fruits and vegetables was established by means of energy balance. Based on the test process parameters, the problem for determining solution was given, which met the temperature changing of samples in liquid phase region and solid phase region during the freeze-drying process. Using numerical method of Euler receding difference scheme, the numerical solution to the freezing mathematical model was found, and the freezing time and the displacement law of freezing boundary were concluded. Test results showed that: the model could describe the freezing process of eggplant accurately, and the numerical solution was feasible. The research provided a means of modeling and solution to fruits and vegetables, and the theoretical basis for optimal control was proposed during the pre-freezing process.
Number of references:16
Main heading:Mathematical models
Controlled terms:Freezing - Low temperature drying - Numerical analysis - Vegetables
Uncontrolled terms:Difference schemes - Freeze-drying process - Freezing boundary - Freezing process - Freezing time - Liquid phase regions - Numerical solution - Optimal controls - Pre-freezing - Research object  - Solid-phase - Steady-state mathematical model - Stefan problem - Temperature changing - Test process - Test results - Theoretical basis
Classification code:644.1 Refrigeration Methods - 802.3 Chemical Operations - 821.4 Agricultural Products - 822.2 Food Processing Operations - 921 Mathematics - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2010.05.057
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 50>
Accession number:20102713062768
Title:Analysis on field water balance and water-saving irrigation modes in Chanzhi Reservior irrigation area
Authors:Liao, Kaihua (1); Xu, Shaohui (1); Cheng, Guifu (3); Lin, Qing (1)
Author affiliation:(1) Department of Environmental Science, Qingdao University, Qingdao 266071, China; (2) Department of Hydrosciences, Nanjing University, Nanjing 210093, China; (3) Qingdao Water Conservancy Bureau, Qingdao 266071, China
Corresponding author:Xu, S.
      (shhxu@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:5
Issue date:May 2010
Publication year:2010
Pages:45-51
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:This paper establishes soil water movement model of typical farmland in Chanzhi Reservior irrigation area based on long-time field experiment. The results indicate that leakage of soil water is almost serious under conventional irrigation mode, precipitation and irrigation show positive correlation with water leakage and field evapotranspiration. Water-saving irrigation modes under the condition of different hydrographic years were simulated based on soil water adjustment criterion, in contrast with conventional irrigation, it could save water 240 mm in wet year, 140 mm in medium precipitation year, and 90 mm in draught year, respectively. Simultaneity, the amounts of water leakage under water-saving irrigation modes are significantly less than conventional irrigation, the leakage intensities of wet year, medium precipitation year, and draught year decrease by 0.66, 0.35 and 0.27 mm/d, respectively. Due to the reasonable control of irrigation in the key growth stages of crop, the amount of water leakage decreases while meeting water requirement for crop. So it can improve the utilization efficiency of irrigation water.
Number of references:19
Main heading:Irrigation
Controlled terms:Crops - Geologic models - Moisture determination - Soil moisture - Underwater soils - Water conservation - Water supply
Uncontrolled terms:Chanzhi Reservior irrigation area - Field evapotranspiration - Growth stages - Irrigation area - Irrigation waters - Leakage - Positive correlations - Soil water - Soil water movement - Time fields  - Under water - Utilization efficiency - Water balance - Water leakage - Water requirements - Water-saving irrigation
Classification code:944.2 Moisture Measurements - 821.4 Agricultural Products - 821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 481.1 Geology - 471.1 Oceanography, General - 446.1 Water Supply Systems - 444 Water Resources - 403.1 Urban Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.05.008
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 51>
Accession number:20102713062761
Title:Tapping of China's biogas industry and its perspective
Authors:Cheng, Xu (1); Liang, Jinguang (2); Zheng, Hengshou (3); Zhu, Wanbin (1)
Author affiliation:(1) Biomass Engineering Center, China Agricultural University, Beijing 100193, China; (2) Guangxi BiJia Microbial Engineering Company, Nanning 530003, China; (3) Guangxi Institute of Vocational Technology, Nanning 530007, China
Corresponding author:Zhu, W.
      (wanbin@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:5
Issue date:May 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:"Industrial biogas" refers to those gases that are scaled producing, then scrubbing and upgrading, and can be thus easily and economically transported through pipeline or pressured tank, so as to substrate for natural gas and liquidized petroleum gas. It differs from conventional biogas based on farmer's household. Resources of natural gas are considerable inadequate in China, while the huge potential of tapping biogas has not yet been widely recognized. This paper analyzed the successful practices of some EU countries, and proposed that China's guideline of organic waste/wastewater treatment should be reconsidered so that it could not only serve to environmental protection, but also gain some economic benefits, i.e., to produce commodity clean energy. Potentials of several traditional feedstock of biogas were inventoried, and approach for phasing out bottlenecks of technologies and policy were discussed. It is concluded that in the medium term China has a capacity of producing biogas equaling to 90 billion cubic meters annually, and biogas industry will be a promising part of bioenergy/biomaterial industry.
Number of references:23
Main heading:Biogas
Controlled terms:Industry - Natural gas - Natural gas deposits - Resource valuation
Uncontrolled terms:Billion cubic meters - Clean energy - Economic benefits - EU countries - Medium term - Perspective of application - Petroleum gas - Technical/policy bottleneck
Classification code:912 Industrial Engineering and Management - 911 Cost and Value Engineering; Industrial Economics - 821.5 Agricultural Wastes - 913 Production Planning and Control; Manufacturing - 522 Gas Fuels - 512 Petroleum and Related Deposits - 501.1 Exploration and Prospecting Methods - 512.2 Natural Gas Deposits
DOI:10.3969/j.issn.1002-6819.2010.05.001
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 52>
Accession number:20102713062769
Title:Retrieval of regional soil water changes based on remote sensing biomass products
Authors:Su, Tao (1); Wang, Pengxin (1); Yang, Bo (2); Liu, Xiangge (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) Information Institute of Heilongjiang Academy of Land Reclamation Sciences, Harbin 150036, China
Corresponding author:Wang, P.
      (wangpx@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:5
Issue date:May 2010
Publication year:2010
Pages:52-58
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to investigate the relation between soil moisture and crop biomass, an approach of retrieving regional soil water changes was studied by using remote sensing biomass products of maize in the Junchuan Farm, Northeast of China. The SEBAL model was used as a referenced model to explain the possibility of using the dynamic model of biomass to monitor crop and soil water status. The results showed that the soil water changes of whole growth and development period of maize ranged from -300 mm to -35 mm. The spatial distributions of the retrieved soil water changes and evapotranspiration estimated by using the SEBAL model were similar, and there were little differences between the monitoring results of the two models. These results indicate the dynamic model for retrieving regional soil water changes is a feasible approach for monitoring regional soil water status.
Number of references:28
Main heading:Geologic models
Controlled terms:Biomass - Crops - Dynamic models - Remote sensing - Soil moisture - Underwater soils - Water supply
Uncontrolled terms:Biomass models - Biomass products - Growth and development - SEBAL model - Soil water - Soil water status - Spatial distribution
Classification code:821.5 Agricultural Wastes - 821.4 Agricultural Products - 805.1.1 Biochemical Engineering - 731.1 Control Systems - 921 Mathematics - 525.1 Energy Resources and Renewable Energy Issues - 481.1 Geology - 471.1 Oceanography, General - 446.1 Water Supply Systems - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2010.05.009
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 53>
Accession number:20102713062802
Title:Effect of compost pre-treatment on biogas production from rice straw
Authors:Gao, Bairu (1); Chang, Zhizhou (1); Ye, Xiaomei (1); Du, Jing (1); Xu, Yueding (1); Zhang, Jianying (1)
Author affiliation:(1) Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Jiangsu 210014, China
Corresponding author:Chang, Z.
      (czhizhou@hotmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 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:The method of compost as a pretreatment of rice straw for anaerobic digestion was used widely. The organic carbon content of the rice straw decreased during compost pretreatment. So it is necessary to understand the influence of the lost organic carbon on the total amount of biogas production, which will help us to objectively evaluate the availability of the pre-treatment of composting. Under the laboratory conditions of 35&deg;C and the total solids (TS) content of 20%, the composition changes and rate of biodegradation of rice straw between treatments with compost pre-treatment and anaerobic fermentation were studied to determine the effects of compost pre-treatment of rice straw and addition of pig manure on biogas production. Results showed that compost pre-treatment of the rice straw didn't enhance biogas production and methane content for the hemicellulose content being decreased by more than 12%, consequently reduced the TS gas production. The decomposition rate of hemicellulose was the highest during the anaerobic fermentation, which was the main contributor of biogas production. As a result, method of composting pretreatment can not improve gas production with rice straw.
Number of references:19
Main heading:Anaerobic digestion
Controlled terms:Biodegradation - Biogas - Cellulose - Composting - Fermentation - Gas pipelines - Gas producers - Manures - Methanation - Methane  - Organic carbon
Uncontrolled terms:Anaerobic fermentation - Biogas production - Composition changes - Decomposition rate - Gas productions - Laboratory conditions - Methane content - Organic carbon contents - Pig manures - Pre-Treatment  - Rice straws - Total solids
Classification code:821.5 Agricultural Wastes - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 805.1.1 Biochemical Engineering - 811.3 Cellulose, Lignin and Derivatives - 815.1.1 Organic Polymers - 619.1 Pipe, Piping and Pipelines - 461.9 Biology - 461.8 Biotechnology - 452.4 Industrial Wastes Treatment and Disposal - 452.3 Industrial Wastes - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 522 Gas Fuels
DOI:10.3969/j.issn.1002-6819.2010.05.043
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 54>
Accession number:20102713062821
Title:Effects of high oxygen atmosphere on quality and resistant substance of mushroom
Authors:Liu, Zhanli (1); Wang, Xiangyou (1); Zhu, Jiying (1); Wang, Juan (1)
Author affiliation:(1) School of Agriculture and Food Engineering, Shandong University of Technology, Zibo 255049, China; (2) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, X.
      (wxy@sdut.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:362-366
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Fresh mushrooms (Agaricus bisporus) were placed in jars linked by continous flow (100 mL/min) of humidified air (control), 40%, 60%, 80% or 100% O<inf>2</inf> at 2&deg;C for 12 days to investigate the effects of high oxygen atmosphere on quality and resistant substance. The results showed that the content of soluble solids was slightly affected by high oxygen concentration. The treatments with 60%-100% O<inf>2</inf> significantly inhibited the decrease of firmness, browning and increase of cell membrane permeability of mushroom. The content of free proline under 60%-100% O<inf>2</inf> was lower than that of control, and the difference was significant (p &lt; 0.05). The content of soluble protein under 60%-100% O<inf>2</inf> was higher, and there was no significant difference. So high oxygen concentration is effective on improving the quality of mushroom.
Number of references:17
Main heading:Quality control
Controlled terms:Cell membranes - Customer satisfaction - Cytology - Fungi - Oxygen - Total quality management
Uncontrolled terms:Agaricus bisporus - Cell membrane permeability - Free proline - Oxygen atmosphere - Oxygen concentrations - Soluble proteins - Soluble solids
Classification code:913.3 Quality Assurance and Control - 912.2 Management - 912 Industrial Engineering and Management - 922.2 Mathematical Statistics - 804 Chemical Products Generally - 461.9 Biology - 461.2 Biological Materials and Tissue Engineering - 801.2 Biochemistry
DOI:10.3969/j.issn.1002-6819.2010.05.062
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 55>
Accession number:20102713062804
Title:Effects of the automatic epidemic prevention system on air quality of henhouse in the winter
Authors:Xu, Xin (1); Lu, Zhenzhen (1); Liu, Jijun (2); Liu, Binjiang (4); Liu, Aiqiao (5); Ma, Zonghu (2); Yang, Yang (1)
Author affiliation:(1) Institute of Planning and Consulting, Chinese Academy of Agrigultural Engineering, Beijing 100125, China; (2) College of Animal Science and Technology, China Agriculture University, Beijing 100193, China; (3) State Key Laboratory of Animal Nutrition, Beijing 100193, China; (4) Hohhot Yijia Tian Environmental Science and Technology Development Co., Ltd, Hohhot 010020, China; (5) Beijing Huadu Yukou Poultry Co., Ltd, Beijing 101206, 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:5
Issue date:May 2010
Publication year:2010
Pages:263-268
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This study chose the 300 automatic epidemic prevention system of space electric air purification and the 3DDC-12 deodorizing and sterilization system of plasma in manure gaps (both for short automatic epidemic prevention system) to determine the effect of cleaning the air in the henhouses in winter. The comparative trials were carried out in two henhouses with same poultry density, same ventilation and temperature controlling system. With the automatic epidemic prevention system installed in the experimental henhouse, the concentration of harmful gases, air microorganisms and dusts under certain conditions were measured in both henhouses. The results of Experiment 2 showed that under proper ventilation conditions which kept room temperature at 14.2 &plusmn; 0.4&deg;C, automatic epidemic prevention system resulted in reduced air concentrations of microorganism, dusts and a lower mortality number in the experiment henhouse by 34.2%, 35.9%, and 46.0% respectively than what did in control henhouse (17.8 vs. 11.72 cfu/L, P &lt; 0.01; 5.52 vs. 3.54 mg/m³, P &lt; 0.01; 4.68 vs. 2.53 per day, P &lt; 0.01). The result showed that the automatic epidemic prevention system could significantly decrease microorganism, air dusts and the mortality rate.
Number of references:17
Main heading:Air purification
Controlled terms:Air filters - Air quality - Dust - Epidemiology - Experiments - Manures - Sterilization (cleaning)
Uncontrolled terms:Air cleaning - Air concentrations - Concentration of - Harmful gas - In-control - Mortality rate - Prevention systems - Room temperature - Sterilization systems - Temperature controlling
Classification code:901.3 Engineering Research - 822.2 Food Processing Operations - 821.5 Agricultural Wastes - 802.3 Chemical Operations - 802.1 Chemical Plants and Equipment - 672 Naval Vessels - 643 Space Heating, Ventilation and Air Conditioning - 462.1 Biomedical Equipment, General - 461.7 Health Care - 452.3 Industrial Wastes - 451.2 Air Pollution Control - 451.1 Air Pollution Sources - 443.1 Atmospheric Properties
DOI:10.3969/j.issn.1002-6819.2010.05.045
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 56>
Accession number:20102713062817
Title:Quality improvement of dried sea cucumber by combined heat pump and hot air method
Authors:Cong, Haihua (1); Xue, Changhu (1); Sun, Yan (2); Sun, Zhaomin (1); Liu, Frank (3)
Author affiliation:(1) College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China; (2) Entry-Exit Inspection and Quarantine Bureau of Shandong Province, Qingdao 266001, China; (3) Department of Biological System Engineering, Washington State University, Pullman, WA, 99164, United States
Corresponding author:Xue, C.
      (xuech@mail.ouc.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:342-346
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 quality of dried sea cucumber, based on the characteristics of hot air drying, the drying characteristics (drying property curve, shrinkage property and product quality) and the rehydration quality (rehydration ratio, rheological property, sensory evaluation) of the brine salting sea cucumbers (Stichopus japonicus) by combined heat pump and hot air drying or traditional hot air drying were studied and analyzed. It was showed that the average contraction coefficient of combined drying products was the lowest, 16.64; while the average rehydration rate was 10.18, which was much higher than hot drying products; and combined drying could obviously improve rheological properties, hardness, elasticity, toughness and viscosity. It is showed that combined drying could obviously advance rehydration quality, and the product get high sensory evaluation.
Number of references:20
Main heading:Drying
Controlled terms:Curing - Heat pump systems - Hot air heating - Pumps - Rheology
Uncontrolled terms:Combined heat - Contraction coefficients - Drying characteristics - Drying products - Hot air - Hot air drying - Product quality - Quality improvement - Rehydration quality - Rehydration ratio  - Rheological property - Sea cucumber - Sensory evaluation - Shrinkage properties
Classification code:931.1 Mechanics - 818.3 Rubber and Elastomer Processing - 815.1 Polymeric Materials - 802.3 Chemical Operations - 802.2 Chemical Reactions - 643.1 Space Heating - 642.1 Process Heating - 641.2 Heat Transfer - 631.1 Fluid Flow, General - 618.2 Pumps - 616.1 Heat Exchange Equipment and Components
DOI:10.3969/j.issn.1002-6819.2010.05.058
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 57>
Accession number:20102713062762
Title:Effect of chlorination on emitter clogging and system performance for drip irrigation with sewage effluent
Authors:Li, Jiusheng (1); Chen, Lei (1); Li, Yanfeng (1)
Author affiliation:(1) China Institute of Water Resources and Hydropower Research, Beijing 100048, China; (2) College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Li, J.
      (lijs@iwhr.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 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:The influences of chlorination schemes on emitter clogging and system performance of drip irrigation systems applying secondary effluent and groundwater were investigated to determine optimum chlorination practices. In the experiments, six types of emitters with or without a pressure-compensating device and having a nominal discharge rate ranging from 1.0 to 2.6 L/h were used and three intermittent injections that maintained the residual chlorine concentration of 2.5, 5.0 and 10.0 mg/L at the end of the systems with an interval varying from one to four weeks were evaluated. The total duration of irrigation was 84 days, with a daily application of 12 hours. The results showed that all the chlorination schemes tested could effectively reduce the clogging in drip emitters applying sewage effluent, especially for the emitters with a nominal discharge rate of less than 1.38 L/h. A high system performance of statistical uniformity coefficient of greater than 90% could be obtained through intermittent chlorination. Although 99.9% of the total bacteria in the sewage effluent could be eliminated by the tested residual chlorine concentration of 2.5, 5.0, and 10.0 mg/L, the injection intervals of one week or two weeks were found to be more effective than the intervals of four weeks in reducing clogging due to biological growth. To maintain a high system performance, a chlorination scheme with low-concentration injection at high frequency is recommended.
Number of references:25
Main heading:Irrigation
Controlled terms:Chlorination - Chlorine - Effluent treatment - Groundwater - Sewage - Sewage treatment
Uncontrolled terms:Biological growth - Chlorine concentration - Compensating devices - Discharge rates - Drip emitter - Drip irrigation - Drip irrigation systems - Emitter clogging - High frequency - Intermittent injection  - Low concentrations - Secondary effluent - Sewage effluents
Classification code:804 Chemical Products Generally - 802.2 Chemical Reactions - 453.1 Water Pollution Sources - 821.3 Agricultural Methods - 452.4 Industrial Wastes Treatment and Disposal - 452.1 Sewage - 444.2 Groundwater - 452.2 Sewage Treatment
DOI:10.3969/j.issn.1002-6819.2010.05.002
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 58>
Accession number:20102713062796
Title:Construction and application of regional fertilization decision-making system based on GoogleMap and WebGIS for peach orchard
Authors:Yan, Zhengjuan (1); Duan, Zengqiang (1); Lu, Shuchang (2); Chen, Qing (1)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (2) Tianjin Agricultural College, Tianjin 300384, China
Corresponding author:Duan, Z.
      (duanzq@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:5
Issue date:May 2010
Publication year:2010
Pages:207-212
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 regional practical peach orchard fertilization decision-making system that integrated fertilization decision-making model, Googlemap and WebGIS was established. Based on target yield and soil fertility level, the fertilization decision-making model applied total amount control and stage regulation fertilization strategy and combined with the growth characteristics of peach trees. Adopted the distributed structure of B/S and supported by thematic spatial database and model database, the system includes 4 main functions: 1) data maintenance and updating, 2) GoogleMap and GIS information browse and query, 3) fertility evaluation, 4) fertilizer recommendation decision-making. Four years' experiment was implemented to verify the fertilization decision-making model in peach orchard in Pinggu County, Beijing. Results showed that: compared with traditional fertilization practice, applying recommended fertilization decision-making model treatment could increase peach fruit mean yield by 27.5% and significantly improve fruit quality (like colors, total sugar, soluble solid content and the ratio soluble solid content and titratable acid) while the nutrient inputs of nitrogen, phosphorus and potassium decreased by 33.5%, 2.7% and 9.6%, respectively. A new model of fertilization system based on GoogleMap and WebGIS was explored and it is applicable for regional nutrient management.
Number of references:23
Main heading:Decision making
Controlled terms:Agricultural products - Fertilizers - Geologic models - Nutrients - Orchards - Phosphorus - Potassium - Sugar (sucrose)
Uncontrolled terms:Data maintenance - Datebase systems - Decision making models - Decision-making systems - Distributed structures - Fruit quality - GoogleMap - Growth characteristic - New model - Nutrient management  - Peach orchards - Peach trees - Soil fertility - Soluble solid content - Spatial database - System-based - Titratable acid - Web-GIS
Classification code:822.3 Food Products - 821.4 Agricultural Products - 821.3 Agricultural Methods - 821.2 Agricultural Chemicals - 912.2 Management - 804 Chemical Products Generally - 481.1 Geology - 461.9 Biology - 454.3 Ecology and Ecosystems - 549.1 Alkali Metals
DOI:10.3969/j.issn.1002-6819.2010.05.036
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 59>
Accession number:20102713062781
Title:Mechanical properties of fresh longan hulling
Authors:Qing, Yanmei (1); Cao, Yuhua (1); Li, Changyou (1); Wang, Weizu (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agricultural Machine and Equipment, College of Engineering, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Cao, Y.
      (cyh2808@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:122-126
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 mechanical properties of fresh longan was determined in this paper. The results of compression tests showed that the anti-extrusion capacity of fresh longan had good consistency in different directions, and it can be simplified as shell sphere, which was isotropy and uniform thickness. The analysis results based on thin shell theory indicated that using a pair normal concentrated force were benefical to equable cracking of the hulls of longan. During the tensile test on hulls, we found that the bonding force of longan fruit along longitudinal and transversal were all bigger than the pedicel. So one can see inference, the hulls of fresh longan can be peelled off by using roller friction, which provides vital basis for designing of the denucleating and shucking machine.
Number of references:13
Main heading:Mechanical properties
Controlled terms:Compression testing - Cracking (chemical) - Cracks - Spheres - Tensile strength - Tensile testing
Uncontrolled terms:Analysis results - Bonding forces - Compression tests - Concentrated force - Equable cracking - Fresh fruits - Hulls - Longan fruit - Tensile tests - Thin shell theory
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 931.1 Mechanics - 802.2 Chemical Reactions - 951 Materials Science - 631 Fluid Flow - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods
DOI:10.3969/j.issn.1002-6819.2010.05.021
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 60>
Accession number:20102713062782
Title:Improvement experiments on the separating device of buckwheat shucker
Authors:Wu, Yingsi (1); Du, Wenliang (1); Liu, Fei (1); Wang, Junlan (1); Chen, Wei (1)
Author affiliation:(1) College of Machinery and Electrical Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China
Corresponding author:Du, W.
      (duwl5711@vip.imau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:127-131
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The paper aimed at the problem that traditional buckwheat shucker matched with the upper end of suction air flow separator, which air flow and materiel mixing asymmetrically, buckwheat shell and shelled buckwheat were not completely separated. In order to improve the separation rate and reduce the loss rate during the buckwheat shell, on the basis of measuring mixed materials suspend speed, the air-suction separator was improved and optimized experiment on suction air flow speed, the number of uniform plate and the position of aeration screen was carried out. The better level combination of main technological parameters was educed, that was suction air flow speed 8.0 m/s and aeration screen placement in middle place, three uniform plates. The results showed that the separation rate of air-suction separator was reached up to 99.3%, the rate of loss was reduced to 0.35% after optimized improvement experiments. It proved that it is effective to improve the traditional buckwheat shucker, develop the separation rate and reduce the loss rate.
Number of references:13
Main heading:Optimization
Controlled terms:Air - Experiments - Parameter extraction - Separators - Speed
Uncontrolled terms:Air flow - Extraction separation - Loss rates - Mixed materials - Optimization parameter - Screen placement - Separation rate - Technological parameters - Upper-end
Classification code:922 Statistical Methods - 921.5 Optimization Techniques - 901.3 Engineering Research - 931.1 Mechanics - 804 Chemical Products Generally - 723.5 Computer Applications - 723.2 Data Processing and Image Processing - 802.1 Chemical Plants and Equipment
DOI:10.3969/j.issn.1002-6819.2010.05.022
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 61>
Accession number:20102713062812
Title:Multi-level framework of land reclamation standard system based on specialized sequence in China
Authors:Wang, Jinman (1); Bai, Zhongke (1); Luo, Ming (2); Jiang, Yijun (2); Wang, Jun (2)
Author affiliation:(1) College of Land Science and Technology, China University of Geosciences, Beijing 100083, China; (2) Land Consolidation and Rehabilitation Center, Ministry of Land and Resources, Beijing 100035, China; (3) Key Laboratory of Land Regulation Ministry of Land and Resources, Beijing 100035, China
Corresponding author:Bai, Z.
      (baizk@cugb.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:312-315
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:Technical standard system construction has same importance and effect compared with legal system establishment for the development of land reclamation. Land reclamation standard system connotation was initially summarized in this paper according to specific characteristics of land reclamation and standard system, and the basic principle for constructing land reclamation standard system was proposed. Based on the current situation of technical standard system on land reclamation in China, preliminary framework of Chinese technical standard system on land reclamation was put forward according to inner link of land reclamation standard system and land reclamation specialized sequence (including investigation, appraisal, plan, design, budget, construction, monitor and management), and land reclamation standard system that including 27 standards was constructed. The constructed standard system framework contained three levels including primary standard, general standard and special-purpose standard, and it may provide the technical support for the land administration department to strengthen the land reclamation management.
Number of references:14
Main heading:Land reclamation
Controlled terms:Reclamation - Standardization - System theory
Uncontrolled terms:Basic principles - Current situation - Land administration - Legal system - Multi-level - Primary standards - Standard system - Technical standards - Technical support
Classification code:961 Systems Science - 912.3 Operations Research - 902.2 Codes and Standards - 731.4 System Stability - 461.1 Biomedical Engineering - 452.4 Industrial Wastes Treatment and Disposal - 442.2 Land Reclamation
DOI:10.3969/j.issn.1002-6819.2010.05.053
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 62>
Accession number:20102713062783
Title:Up-shift control in wet double clutch transmission
Authors:Lu, Zhonghua (1); Cheng, Xiusheng (1); Feng, Wei (1)
Author affiliation:(1) State Key Laboratory of Automobile Dynamic Simulation, Changchun 130025, China
Corresponding author:Cheng, X.
      (xiusheng_cheng@yahoo.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:132-136
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 shifting jerk of dual-clutch automatic transmission and clutch fray, the characteristic of dual-clutch pressure transmitting during shifting was studied based on the analysis of shifting quality evaluation, and method to control the clutch pressure was proposed. Taking up-shift from 1 to 2 for example, up-shifting control strategy was drawed. The effection on shifting quality of dual-clutch automatic transmission in the presence of engine was discussed. After applied the introduced method into the real car test under different throttle positions, ideal shifting quality was achieved. The result indicated that the speed of vehicle changed gentlely without distinct impact, and the oil temperature hardly changed. This essay verifies the validity of the proposed method of dual-clutch pressure control and the strategy of shifting control.
Number of references:15
Main heading:Clutches
Controlled terms:Quality control
Uncontrolled terms:Automatic transmission - Clutch pressure - Clutch transmissions - Control strategies - Oil temperature - Quality evaluation - Shift strategy - Wet clutch - Wet Clutches
Classification code:602.2 Mechanical Transmissions - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2010.05.023
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 63>
Accession number:20102713062776
Title:Reconstruction and optimal design of driving dentate disc of D-bale knotter based on reverse engineering
Authors:Li, Hui (1); Li, Hongwen (1); He, Jin (1); Wang, Qingjie (1); Wu, Hongdan (1); He, Qing (2)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) Collaboration Center, State Intellectual Property Office, Beijing 100190, 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:5
Issue date:May 2010
Publication year:2010
Pages:96-102
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:Driving dentate disc is the power source of mechanical bale knotter. The bale knotters used in domestic mostly depend on imports and the knotters could not meet the requirements of high-efficient straw belting due to the unstable working status caused by un-smooth cam working surface of driving dentate disc and discontent with static equilibrium. This paper took the D-twine knotter as the research objective and optimal designed a weight driving dentate disc with the features of high surface quality and stable transmission based on the theory of reverse engineering. Through the analysis of the working principle of D-twine knotter, the paper reconstructed the 3D driving dentate disc and optimized its surface and structure with the Imageware and Pro/E software. The analysis of multi-surface continuity and surface contour of driving dentate disc showed that after the optimization of weight driving dentate disc, its surface position deviation and change rate of tangent were 0.0013-0.0037 mm and 0.1393&deg;-0.1400&deg;, respectively. The change of surface curvature was continuous and the chord deviation was 0.100 mm, indicating the disc surface met the requirements of A-class surface. Furthermore, the parts matched with disc surface worked steadily, which ensured the operation order in straw-belting. The new center of the disc was about (2.87, 0, 0) mm, which reached the requirements of static equilibrium and could meet the requirements of high-speed belting in heavy straw cover fields in harvest season in China.
Number of references:13
Main heading:Surface reconstruction
Controlled terms:Agricultural machinery - International trade - Optimization - Reengineering - Repair - Reverse engineering - Three dimensional - Twine
Uncontrolled terms:3D restruction - D-bale knotter - Driving dentate disc - Harvest season - High-speed - Multi-surface - Optimal design - Power sources - Pro/E software - Research objectives  - Static equilibrium - Surface contour - Surface curvatures - Surface positions - Surface qualities - Working principles
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 911.4 Marketing - 912.2 Management - 913.3 Quality Assurance and Control - 913.5 Maintenance - 921 Mathematics - 921.5 Optimization Techniques - 902.3 Legal Aspects - 821.1 Agricultural Machinery and Equipment - 819.4 Fiber Products - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 694.2 Packaging Materials - 902.1 Engineering Graphics
DOI:10.3969/j.issn.1002-6819.2010.05.016
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 64>
Accession number:20102713062801
Title:Effect of two-added powdered bamboo-charcoal on sludge granulation of UASB reactor
Authors:Cao, Yucheng (1); Zhang, Miaoxian (1); Shan, Shengdao (1)
Author affiliation:(1) School of Environmental Technology, Zhejiang Forestry University, Hangzhou 311300, China
Corresponding author:Shan, S.
      (shanshd@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:246-250
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:Aimed to investigate the effects of the difference in the addition of powdered Bamboo-Charcoal on the sludge granulation in upflow anaerobic sludge bed (UASB), two UASB reactors were used to treat piggery wastewater, the sludge granulation and characteristics of granluar sludge were evaluated between the testing group UASB reactor (with two-added powdered Bamboo-Charcoal) and the blank group UASB reactor (with one-added powdered Bamboo-Charcoal). The results showed that the addtion of powdered bamboo-charcoal could markedly accelerate the anaerobic granulation and facilitate the formation of the large-size granluar sludge after producing the granluar sludge. It could improve the settlement ability of granluar sludge and accordingly increase the COD removal efficiency. On the 57th day, the sludge granulation rate (SGR) from sludges on the bottom and the top of the testing group UASB reactor reached 94.5% and 60.7% respectively, higher than the blank group by 7.9% and 17.3% respectively; The content of granluar sludge (Diameter &gt; 1.7 mm) of the bottom for the testing group reactor reached 41.7%, while the blank group only 32.4%; The COD removal rates of the testing group and the blank group reached 81.6% and 75.7% respectively. Based on the results of the experiment, the second addition of Bamboo-Charcoal following the appearance of granluar sludge exhibited the ability to enhance sludge granulation process dring start-up.
Number of references:20
Main heading:Sludge digestion
Controlled terms:Anaerobic digestion - Bamboo - Charcoal - Chemical oxygen demand - Digestive system - Granulation - Removal - Wastewater - Wastewater reclamation - Wastewater treatment  - Water treatment plants
Uncontrolled terms:Anaerobic granulation - COD removal efficiency - COD removal rate - Large sizes - Piggery wastewater - Start-ups - UASB - UASB reactor - Upflow anaerobic sludge beds
Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 524 Solid Fuels - 821.4 Agricultural Products - 802.2 Chemical Reactions - 811.1 Pulp and Paper - 811.2 Wood and Wood Products - 802.3 Chemical Operations - 454.2 Environmental Impact and Protection - 453 Water Pollution - 402.1 Industrial and Agricultural Buildings - 445.1 Water Treatment Techniques - 446.1 Water Supply Systems - 452.2 Sewage Treatment - 452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal
DOI:10.3969/j.issn.1002-6819.2010.05.042
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.

<RECORD 65>
Accession number:20102713062820
Title:Influence of antioxidants on physicochemical and sensory characteristics of irradiated pork
Authors:Li, Xin (1); Lin, Ruotai (1); Xiong, Guangquan (1); Cheng, Wei (1); Geng, Shengrong (1); Liao, Tao (1)
Author affiliation:(1) Institute of Farm Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Corresponding author:Lin, R.
      (rtlin53@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:5
Issue date:May 2010
Publication year:2010
Pages:357-361
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 physicochemical and sensory characteristics of irradiated pork treated with 4 antioxidants (tert-butylhydroquinone, astaxanthin, vitamin E, tea polyphenols) were studied to reduce off-odor and lipid oxidation of irradiated pork. Pork was soaked in antioxidants solution (2 g/L), aerobically packaged, irradiated at 2.6 kGy, and refrigerated storage for 10 days. Sensory characteristics and some physicochemical parameters such as peroxide value, thiobarbituric acid reactive substances, volatile substances, and scavenging capacity of antioxidants on the hydroxyl radical were analyzed. The result showed that tert-butylhydroquinone could keep sensory characteristics of pork and restrain lipid oxidation during storage time compared with astaxanthin, vitamin E and tea polyphenols. Both tert-butylhydroquinone and vitamin E could effectively decreased contents of volatile compounds. Especially, the scavenging rate of hydroxyl radicals based on tert-butylhydroquinone (0.5 g/L) was 52.5%, higher than other antioxidants, which effectively inhibited the oxidation reaction from hydroxyl radicals in irradiating pork.
Number of references:16
Main heading:Meats
Controlled terms:Irradiation - Lipids - Oxidation - Phenols - Scavenging - Volatile organic compounds
Uncontrolled terms:Antioxidant - Astaxanthin - Hydroxyl radicals - Lipid oxidation - Off-odor - Oxidation reactions - Peroxide value - Physicochemical parameters - Refrigerated storages - Scavenging capacity  - Scavenging rates - Sensory characteristics - Storage time - Tea polyphenols - Thiobarbituric acid reactive substances - Vitamin-E - Volatile compounds - Volatile substances
Classification code:932.1 High Energy Physics - 822.3 Food Products - 804.1 Organic Compounds - 802.2 Chemical Reactions - 741.1 Light/Optics - 711.1 Electromagnetic Waves in Different Media - 622.2 Radiation Effects - 612.1 Internal Combustion Engines, General - 451.1 Air Pollution Sources
DOI:10.3969/j.issn.1002-6819.2010.05.061
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.