<RECORD 1>

Accession number:20104613383977Title:Effects of soil physical properties on irrigation quality of lateral in subsurface drip irrigation
Authors:Li, Gang (1); Wang, Xiaoyu (1); Bai, Dan (2)
Author affiliation:(1) College of Water Resources and Architectural Engineering, Tarim University, Alaer 843300, China; (2) Key Lab. of Northwest Water Resources and Environment Ecology, Ministry of Education, Xi'an University of Technology, Xi'an 710048, China
Corresponding author:Wang, X.
      (cxwxy1@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:14-19
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Pressure head deviation rate and emitter flow deviation rate are two important indexes to evaluate irrigation quality of micro-irrigation system. The mathematical model for lateral hydraulic calculation in subsurface drip irrigation (SDI) was established. The model was used to study influences of soil physical properties upon hydraulic characteristics and irrigation quality of lateral in SDI. The results showed that pressure head deviation rate and flow deviation rate of lateral in SDI were lower than these two indexes in drip irrigation (DI) due to restrictive effects of soil physical properties on emitter discharges in SDI. The effects of soil texture, soil bulk density and initial soil moisture on irrigation quality of lateral in SDI were not significant. But the finer soil texture, higher soil bulk density, higher initial soil moisture was, the lower pressure head and flow deviation rates, and the better irrigation quality were. So irrigation quality of lateral in SDI was better than that of lateral in DI, and soil physical properties were advantageous to irrigation quality of laterals in SDI. These results can provide reference for studying hydraulic characteristics of field pipe network system in SDI and SDI technology application.
Number of references:24
Main heading:Geologic models
Controlled terms:Buoyancy - Hydraulics - Mathematical models - Moisture determination - Physical properties - Soil moisture - Subirrigation - Textures
Uncontrolled terms:Drip irrigation - Flow deviation rate - Hydraulic calculations - Hydraulic characteristic - Initial soil moisture - Lateral - Lower pressures - Microirrigation systems - Pipe networks - Pressure head deviation rate  - Pressure heads - Soil bulk density - Soil physical property - Soil textures - Subsurface drip irrigation - Technology application
Classification code:933 Solid State Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 921 Mathematics - 944.2 Moisture Measurements - 821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 481.1 Geology - 632.1 Hydraulics
DOI:10.3969/j.issn.1002-6819.2010.09.003
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 2>

Accession number:20104613384006Title:Development of intelligent control system for bioreactor of marine microbial enzymes
Authors:Zhu, Xianglin (1); Liu, Yefei (1); Sun, Mi (2); Wang, Yuejun (2)
Author affiliation:(1) School of Electrical and Information Engineering of Jiangsu University, Zhenjiang 212013, China; (2) Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
Corresponding author:Liu, Y.
      (liuyefei@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:9
Issue date:September 2010
Publication year:2010
Pages:185-191
Language: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 bio-fermentation process has highly nonlinear, time-varying, higher and more variable and large uncertain characteristics. In order to achieve automatic control of the fermentation process, improve the level of production of biotechnology products, and make the detection of fermentation process parameters, operation monitoring and automatic control intelliget, we constructed a feedforward decoupling method for the multi-variable fuzzy neural control system, with analysising of the main factors affecting the fermentation process as well as the variable coupling and applicating the integrated application of the traditional PID control and fuzzy neural network technology. And the method is applicated in the fermentation process. While the problem of emissions and bacterial contamination of the tank leakage are solved with using the condensation, recovery, and the tail gas of fermentation technology. Fuzzy neural controller and decoupling are independent designed. Neural Network is introduced in the fuzzy controller, and the decoupling network applys a layer of hidden layer. Network weights are on-line adjusted based on a simplified learning algorithm according to the system output error. with the purpose of dynamic decoupling without the need to identify the controlled object model. The method is simple and computation, and the actual application results show that this algorithm has good control effect.
Number of references:16
Main heading:Process control
Controlled terms:Automation - Control - Controllers - Dissolved oxygen - Environmental protection - Fermentation - Fuzzy neural networks - Gas emissions - Learning algorithms - Network layers  - Sustainable development - Three term control systems
Uncontrolled terms:Aeration rate - Automatic control - Bacterial contamination - Biotechnology products - Controlled objects - Decoupling controls - Decoupling network - Dynamic decoupling - Feed-forward decoupling - Fermentation process  - Fuzzy controllers - Fuzzy-neural control - Fuzzy-neural controllers - Hidden layers - Highly nonlinear - Integrated applications - Microbial enzymes - Multi variables - Network weights - Operation monitoring  - PID control - System output - Tail gas - Time varying - Variable coupling
Classification code:911.2 Industrial Economics - 802.2 Chemical Reactions - 732.1 Control Equipment - 731.1 Control Systems - 731 Automatic Control Principles and Applications - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 454.2 Environmental Impact and Protection - 451.1 Air Pollution Sources - 445 Water Treatment - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.09.032
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 3>

Accession number:20104613384012Title:Soil moisture estimation at various growth stages of winter wheat based on ASAR data
Authors:Bao, Yansong (1); Liu, Li (1); Kong, Lingyin (1); Wang, Jihua (2); Liu, Liangyun (3)
Author affiliation:(1) Key Laboratory of Meteoroglogical Disaser of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China; (2) National Engineering Research Center for Information Technology in Agriculture, Beijing 100089, China; (3) Center for Earth Observation and Digital Earth, Chinese Acad. of Sci., Beijing 100190, China
Corresponding author:Bao, Y.
      (baoys@sohu.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:224-232
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this study, the relationship between Advanced Synthetic Aperture Radar (ASAR) data and soil moisture was studied using correlation analysis. The empirical and semi-empirical approaches were used to develop the soil moisture estimation models based on ASAR data. Some conclusions were drawn. Firstly, winter wheat crown scattering influenced the sounding depth of ASAR. The optional depths for monitoring the soil moisture by ASAR were 0-20 cm and 0-5 cm for before the erecting stage and after the jointing stage, respectively. Secondly, since ASAR data at VV polarization and low incidence angle had significant linear correlations with soil moisture, the empirical models were suitable to estimate soil moisture before the jointing stage; however, when winter wheat crown was dense (at the earing stage), the empirical model could not be applied to retrieve soil moisture with a high accuracy. Then, multi-angle ASAR data were used to develop a semi-empirical model to retrieve soil moisture with a higher accuracy. Finally, the soil moisture estimation models developed in this study were employed to estimate soil moisture, the Root Mean Squared Error of estimated soil moisture were 0.0125, 0.0247 and 0.0298 g/g, respectively.
Number of references:35
Main heading:Soil surveys
Controlled terms:Backscattering - Dielectric properties - Estimation - Geologic models - Imaging systems - Moisture control - Moisture determination - Soil moisture - Synthetic aperture radar
Uncontrolled terms:Advanced synthetic aperture radars - ASAR - ASAR data - Backscattering coefficient - Correlation analysis - Empirical model - Growth stages - Incidence angles - Linear correlation - Multi-angle  - Root mean squared errors - Semi-empirical approach - Semiempirical models - Soil moisture estimation - Winter wheat
Classification code:944.2 Moisture Measurements - 921 Mathematics - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 716.2 Radar Systems and Equipment - 711 Electromagnetic Waves - 701 Electricity and Magnetism - 483.1 Soils and Soil Mechanics - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2010.09.038
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 4>

Accession number:20104613384014Title:Improvement of Ts-NDVI space method in drought monitoring
Authors:Yu, Min (1); Gao, Yuzhong (1); Zhang, Hongling (2)
Author affiliation:(1) Heilongjiang Provincial Meteorological Bureau, Harbin 150001, China; (2) Heilongjiang Climate Center, Harbin 150030, China
Corresponding author:Yu, M.
      (yy629@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:243-250
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the instability of dry and wet edges of Ts-NDVI space in drought monitoring, a general Ts-NDVI space method was presented in the paper. Firstly, the single Ts-NDVI space of every year was constructed separately. Then the maximum and minimum temperatures were extracted respectively from the dry and wet edges of the single spaces to combine the general space suitable to all years. The experiment and validation were conducted with MODIS data, precipitation and SPI. The results show that the general space without changing the actual observation of every pixel is free from the any in-situ ancillary data. The general space method improves the stability of Ts-NDVI space, and can give more accurate surface moisture information than the primary single space. The general space is not only related to the recent rainfall but also related to the past cumulative rainfall.
Number of references:23
Main heading:Space optics
Controlled terms:Drought - Rain - Remote sensing
Uncontrolled terms:Drought monitoring - Satellite remote sensing - SPI - Ts-NDVI space improvement - VTCI
Classification code:443.3 Precipitation - 731.1 Control Systems - 741.1 Light/Optics
DOI:10.3969/j.issn.1002-6819.2010.09.040
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 5>

Accession number:20104613383984Title:Change in pan evaporation and its driving factors in Jiangxi Province
Authors:Sun, Shanlei (1); Zhou, Suoquan (1); Song, Jie (1); Shi, Jianhong (3); Gu, Renying (4); Ma, Fengmin (5)
Author affiliation:(1) Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China; (2) Northern Illinois University, DeKalb County 60115, United States; (3) Wenzhou City Meteorological Bureau in Zhejiang Province, Wenzhou 325027, China; (4) Ningbo City Meteorological Bureau in Zhejiang Province, Ningbo 315012, China; (5) Jiangxi Provincial Climate Center, Nanchang 330009, China
Corresponding author:Sun, S.
      (ppsunsanlei@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:59-65
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to discuss the influences of the climate changes on the land-surface hydrological processes, in this paper, observation data from 79 weather stations of Jiangxi Province from 1960 to 2005 were analyzed, the attributions of changing annual pan evaporation due to percentage of sunshine duration, wind speed, actual vapor pressure, minimum temperature and maximum temperature were evaluated with Penman equation. It showed that the annual pan evaporation in Poyang Lake Basin as a whole had continuously decreased at a rate of -4.57 mm/a in the past 46 years. The major factors for annual pan evaporation decrease were reduced sunshine hours and weakened wind speed, with their attributions of -2.06 mm/a and -2.58 mm/a, respectively, whereas decrease in atmospheric vapor pressure and the increases in both the minimum and maximum temperatures contributed to the relatively smaller annual pan evaporation increase, with their attributions of 0.12 mm/a, 0.50 mm/a and 0.30 mm/a, respectively. In summary, the relative contributions of the five environmental factors to the observed pan evaporation variations were listed in the order of importance: wind speed (56.46%)&gt; percentage of sunshine duration (45.08%)&gt;minimum temperature (-10.94%)&gt; maximum temperature (-6.57%)&gt; vapor pressure (-2.63%).
Number of references:36
Main heading:Atmospheric temperature
Controlled terms:Aerodynamics - Climate change - Energy balance - Evaporation - Hydrostatic pressure - Vapor pressure - Vapors - Wind effects
Uncontrolled terms:Driving factors - Environmental factors - Hydrological process - Jiangxi Province - Major factors - Maximum temperature - Observation data - Pan evaporation - Penman equation - Poyang Lake  - Relative contribution - Sunshine duration - Sunshine Hour - Weather stations - Wind speed
Classification code:443.1 Atmospheric Properties - 631.1.1 Liquid Dynamics - 651.1 Aerodynamics, General - 802.3 Chemical Operations - 804 Chemical Products Generally - 931 Classical Physics; Quantum Theory; Relativity
DOI:10.3969/j.issn.1002-6819.2010.09.010
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 6>

Accession number:20104613383983Title:Water consumption of cherry tomato with mulched drip irrigation in solar greenhouse
Authors:Guo, Zhankui (1); Liu, Honglu (1); Wu, Wenyong (1); Yang, Shengli (1)
Author affiliation:(1) Beijing Hydraulic Institute, Beijing 100048, China; (2) College of Water Resources and Civil Engineering, China Agriculture University, Beijing 100083, 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:9
Issue date:September 2010
Publication year:2010
Pages:53-58
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The aim of the experiment is providing a reference for reasonable irrigation schedule development of greenhouse crops. Daily evapotranspiration of cherry tomato with mulch-drip irrigation was determined using large-scale weighting lysimeter in Beijing, and the solar greenhouse meteorological conditions and pan-evaporation were analyzed. Water consumption intensity, crop coefficient, and pan evaporation coefficient were determined for each growing stage. The results showed that the water consumption intensity, crop coefficient and pan evaporation coefficient for growing stages, i.e., in seedling stage were 0.22 mm/d, 0.09, 0.10, in flowering-setting stage were 1.65 mm/d, 0.48, 0.65; in fruiting stage were 2.56 mm/d, 1.56, 1.76, and later fruiting stage were 1.90 mm/d, 1.12, 2.06, respectively. There are significant relationship among the accumulated evapotranspiration, accumulated pan evaporation, and accumulated temperature, which provide a certain basis for the reasonable irrigation schedule development of greenhouse crops.
Number of references:21
Main heading:Irrigation
Controlled terms:Crops - Evaporation - Evapotranspiration - Forestry - Fruits - Greenhouses - Lysimeters - Scales (weighing instruments) - Soil surveys - Solar heating  - Water supply
Uncontrolled terms:Crop coefficient - Daily evapotranspirations - Drip irrigation - Greenhouse crops - Irrigation schedule - Meteorological condition - Pan evaporation - Solar greenhouse - Water consumption
Classification code:406.2 Roads and Streets - 446.1 Water Supply Systems - 643.1 Space Heating - 802.3 Chemical Operations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 943.3 Special Purpose Instruments
DOI:10.3969/j.issn.1002-6819.2010.09.009
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 7>

Accession number:20104613384024Title:Health appraisal of farmland under mechanism of urbanization drive
Authors:Li, Qiang (1); Zhao, Ye (2); Yan, Jinming (1)
Author affiliation:(1) School of Public Administration, Renmin University of China, Beijing 100872, China; (2) State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
Corresponding author:Zhao, Y.
      (zhaoye@bnu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:301-307
Language: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 health appraisal of farmland health is basic for achievement of pay equal attention on land quantity, quality and ecology, and the status of farmland health is important to guarantee of food security (production and quality). Based on the comprehensive analysis of the influence of urbanization actuation on suburb farmland, a case study was conducted in the border region between Beijing, Tianjin City and Hebei Province in China. The indicator attributes were obtained from farmland classification data, field investigation and laboratory analysis of samples. This study established an appraisal system including quality, productivity and soil environment to evaluate the health of farmland with a composite index developed by using the fuzzy evaluation model. The evaluation results showed that the health status of farmland in region mentioned above was divided into three classes, namely in perfect health, normal health and sub-health, and the index of farmland health defuzzified by centroid method ranged from 0.539 to 0.736. The status of farmland health was good in the study area, but the potential pollution risk of soil environment had risen with increased agricultural income by urbanization drive. This study indicate that the appraisal system and method are helpful and meaningful to carry out the farmland health evaluation, and the evaluating indicators degree of membership analysis can sufficiently reflect the influence of urbanization actuation on farmland health.
Number of references:22
Main heading:Health risks
Controlled terms:Ecology - Farms - Food supply - Fuzzy sets - Geologic models - Health - Productivity - Soils
Uncontrolled terms:Centroid method - Composite index - Comprehensive analysis - Degree of membership - Evaluating indicators - Evaluation results - Farmland health - Field investigation - Food security - Fuzzy evaluation  - Health appraisal - Health evaluation - Health status - Hebei Province - Laboratory analysis - Quality - Soil environment - Study areas - Tianjin - Urbanization actuation
Classification code:921 Mathematics - 914.3 Industrial Hygiene - 913.1 Production Engineering - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 483.1 Soils and Soil Mechanics - 481.1 Geology - 461.7 Health Care - 454.3 Ecology and Ecosystems - 404.2 Civil Defense
DOI:10.3969/j.issn.1002-6819.2010.09.050
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 8>

Accession number:20104613384016Title:Design and implementation of the spatial decision support system for agriculture
Authors:Yan, Xiaojun (1); Wang, Weirui (1); Liang, Jianping (1)
Author affiliation:(1) Information Center of Beijing Municipal Bureau of Agriculture, Beijing 100029, China
Corresponding author:Liang, J.
      (liangjp@bjny.gov.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 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:In order to improve efficiency and accuracy of decision-making of capital agricultural, according to current situation and features of the agriculture in Beijing, integrating global positioning system (GPS) and remote sensing (RS) as tools of data capture, and the internet platform as a passage of transmission and share of the data, using a set of new technologies, e.g. business flow, spatial and temporal analysis, and middleware, an efficient system of information technology services was built, which have the functions of collecting, dealing, transmitting, storing, analyzing, and applying of the data. The integrative innovation broke through such problems as a fusion of multi-source heterogeneous data, on-line incremental update, and decision-making methods for agricultural management, and established management and decision support system of capital agricultural based on GIS. This paper selected facilities agriculture facilities and animal diseases for technical application object, and achieved decision support about planning and structural adjustment of agriculture facilities and online editorial management functions, while achieving decision support about prevention and control of animal disease emergency. Running of the system proves a promotive transition from the traditional, rough and experimental mode towards to the precise, synergetic, and scientific mode and provides sufficient basis for agricultural management to make rapid and scientific decision.
Number of references:15
Main heading:Decision making
Controlled terms:Agriculture - Animals - Artificial intelligence - Data flow analysis - Decision support systems - Decision theory - Disease control - Diseases - Global positioning system - Middleware  - Planning - Remote sensing
Uncontrolled terms:Agricultural management - Animal disease - Business flow - Current situation - Data capture - Decision supports - Decision-making method - Efficient systems - Experimental modes - Heterogeneous data  - Incremental updates - Incremental updating - Information technology services - Management functions - Multisources - New technologies - Spatial and temporal analysis - Spatial decision support systems - Technical applications - Temporal management
Classification code:961 Systems Science - 921 Mathematics - 912.2 Management - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 731.1 Control Systems - 723.4 Artificial Intelligence - 723.1 Computer Programming - 716.3 Radio Systems and Equipment - 461.7 Health Care
DOI:10.3969/j.issn.1002-6819.2010.09.042
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 9>

Accession number:20104613384036Title:Preparation technology of cellulose acetate from sugarcane bagasse by mechanical activation
Authors:Chen, Yuan (1); Huang, Zuqiang (2); Yang, Jiatian (1); Zhu, Wanren (1); Mo, Jianhua (1); Liu, Liyan (1)
Author affiliation:(1) Department of Chemistry and Biology, Yulin Normal University, Yulin 537000, China; (2) School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
Corresponding author:Huang, Z.
      (huangzq@gxu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:374-380
Language: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 utilize sugarcane bagasse and prepare cellulose acetate of high degree of substitution, sugarcane bagasse (SCB) was mechanically activated by a stirring-type ball mill. Using acetic anhydride as esterification agent and concentrated sulfuric as catalyst, cellulose acetate (CA) was synthesized from sugarcane bagasse with different activation times. The effects of mechanical activation time, reaction time, reaction temperature, amount of catalyst and solid-liquid ratio on esterification of sugarcane bagasse were investigated respectively by using degree of substitution (DS) of cellulose acetate as evaluating parameter. The best conditions of preparation technique were confirmed by anorthogonal test. The results indicated that mechanical activation considerably enhanced the acetylation of sugarcane bagasse. Mechanical activated sugarcane bagasse was easier acetylation than the original sugarcane bagasse. Due to mechanical activation broken the sealing of cellulose by lignin, destroyed the crystalline structure, decreased the degree of crystallinity of cellulose, which made esterification reagent more easily penetrate into the sugarcane bagasse internal. It could increase reactivity and decrease the dependence of reaction time, reaction temperature and amount of catalyst. The degree of substitution of cellulose acetate was 2.81 by acetylation of mechanical activated sugarcane bagasse for 1.0 h and reaction in the conditions of liquid - solid ratio12 mL/g, mass fraction of catalyst 4%, reaction temperature 60&deg;C and reaction time 3.0 h. The structure of cellulose acetate from sugarcane bagasse were characterized by using infrared spectroscopy (IR), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results would provide a base and data for the preparation of cellulose acetate of high degree of substitution.
Number of references:16
Main heading:Bagasse
Controlled terms:Acetylation - Ball mills - Catalysts - Cellulose - Esterification - Esters - Infrared spectroscopy - Liquids - Scanning - Scanning electron microscopy  - X ray diffraction
Uncontrolled terms:Acetic anhydrides - Activation time - Cellulose acetate - Cellulose acetates - Crystalline structure - Degree of crystallinity - Degree of substitution - Esterification reagents - Liquid solids - Mass fraction  - Mechanical activation - Preparation technique - Preparation technology - Reaction temperature - Reaction time - Scanning electrons - SEM - Solid-liquid ratio - Sugarcane bagasse
Classification code:931.3 Atomic and Molecular Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 811.3 Cellulose, Lignin and Derivatives - 811 Cellulose, Paper and Wood Products - 804.1 Organic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.2 Chemical Reactions - 802.1 Chemical Plants and Equipment - 741.3 Optical Devices and Systems - 524 Solid Fuels
DOI:10.3969/j.issn.1002-6819.2010.09.062
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 10>

Accession number:20104613384019Title:Temperature modified model for single-leaf net photosynthetic rate of greenhouse tomato
Authors:Li, Tianlai (1); Yan, Adan (1); Luo, Xinlan (1); Qiu, Jiaqi (1); Li, Dong (1); Yao, Zhenkun (1)
Author affiliation:(1) Key Laboratory of Protected Horticulture of Liaoning Province, College of Horticulture of Shenyang Agriculture University, Shenyang 110866, China; (2) College of Agronomy of Shenyang Agriculture 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:9
Issue date:September 2010
Publication year:2010
Pages:274-279
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Environmental factors modified model has an important role for single-leaf net photosynthetic rate of greenhouse tomato in environmental regulation. Based on experimental data and prediction literature, fundamental temperature modified model for the maximum photosynthetic rate of greenhouse tomato in single-leaf net photosynthetic rate was developed. Through the net photosynthetic rate in the different CO<inf>2</inf> concentrations, different light intensity, and different temperature, a part of the data used to determine the parameters in the model, other of the data used to test the model results. The results, which were determined by the value of the correction factor C formula and by the fit test, showed that the simulated and observed data of net photosynthetic rate of the tomato leaf simulation model fitted well. This model could be as a sub-model of the photosynthetic simulation model of tomato in greenhouse, so that the photosynthetic model of tomatoes tends to be perfect. Single-leaf net photosynthetic rate of plant model is better suited for greenhouse tomato production.
Number of references:24
Main heading:Computer simulation
Controlled terms:Environmental regulations - Fruits - Greenhouses - Photosynthesis
Uncontrolled terms:Correction factors - Environmental factors - Experimental data - Greenhouse tomatoes - Light intensity - Model results - Modified - Modified model - Net photosynthetic rate - Observed data  - Photosynthetic model - Photosynthetic rate - Plant model - Simulation model - Tomato - Tomato leaf
Classification code:454.2 Environmental Impact and Protection - 723.5 Computer Applications - 741.1 Light/Optics - 821.4 Agricultural Products - 821.6 Farm Buildings and Other Structures
DOI:10.3969/j.issn.1002-6819.2010.09.045
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 11>

Accession number:20104613383978Title:Effects of sea ice water irrigation and different fertilizations on soil salinality dynamics and cotton
Authors:Hu, Yujiao (1); Wang, Xiaobin (1); Zhao, Quansheng (1); Zheng, Yan (1); Wu, Xueping (1); Cai, Dianxiong (1); Wu, Huijun (1); Xu, Yingjun (3); Gu, Wei (3)
Author affiliation:(1) Key Laboratory of Plant Nutrition and Nutrient Cycling Ministry of Agriculture, MOA, Institute of Agriculture Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (2) Key Laboratory of Dryland Farming, MOA, Beijing 100081, China; (3) State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
Corresponding author:Cai, D.
      (dxcai@caas.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:20-27
Language: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 agronomic measures of irrigation by sea-ice water, amending the wasteland and alkaline arable land, the present study was for the purpose of investigating the effects of amelioration measures on soil salt dynamics and cotton yield under sea ice water irrigation. Four amelioration measures were inorganic fertilizer, inorganic + organic fertilizers, inorganic fertilizer + soil conditioner, and control (no fertilizer). The results showed that: (1) from 2007 to 2008, the soil salt in 1 m soil profile decreased with sea ice water irrigation. The soil desalting efficiency was about 40.2%. Na⁺ and Cl^- in 0-40 soil layer were significantly decreased too; (2) the soil desalting efficiency in 1 m soil profile with sea ice water irrigation and PAM was 33820 kg/hm² higher than that without PAM. The desalting efficiencies for Na⁺ and Cl^- in the plow layers with PAM were also significant. (3) 2007-2008, cotton yield with different fertilization methods under irrigation with sea ice water were CK (no fertilizer)&lt;inorganic fertilizers&lt;inorganic + organic fertilizers&lt;inorganic fertilizers + soil conditioner fertilizer. Inorganic fertilizers + soil conditioner fertilizer was ca. 568 kg/hm² higher than inorganic fertilizers in yield of cotton. Continued irrigation with sea ice water in two years could effectively reduce soil salt and avoid secondary salinization.
Number of references:20
Main heading:Fertilizers
Controlled terms:Cotton - Desalination - Dynamics - Irrigation - Oceanography - Salts - Sea ice - Seawater - Soil conditioners - Soils
Uncontrolled terms:Arable land - Cotton yield - Desalting efficiency - Ice water - Inorganic fertilizers - Organic fertilizers - Plow layers - Soil layer - Soil profiles - Soil salt content dynamics
Classification code:931.1 Mechanics - 821.4 Agricultural Products - 821.3 Agricultural Methods - 804 Chemical Products Generally - 483.1 Soils and Soil Mechanics - 471.4 Seawater, Tides and Waves - 471.1 Oceanography, General
DOI:10.3969/j.issn.1002-6819.2010.09.004
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 12>

Accession number:20104613384037Title:Effects of extruding processing of Tieguanyin tea stem on its flavor and aroma components
Authors:Du, Bing (1); Chen, Yuejiao (2); Li, Yanjie (1); Jiang, Dongwen (1); Xia, Yu (1); Yang, Gongming (1)
Author affiliation:(1) College of Food Science, South China Agriculture University, Guangzhou 510642, China; (2) College of Light Industry and Food, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China; (3) Department of Food Science, Guangdong Food and Drug Vocational College, Guangzhou 510520, China
Corresponding author:Li, Y.
      (yanzi0713@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:381-384
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:For the comprehensive utilization tea stalk which was always discarded by tea processing factories, the Tieguanyin tea stalk was processed by extrusion technology. The aroma and taste components in the Tieguanyin tea stalk before and after extrusion were determined. Results revealed that the decreases in the contents of taste components such as ash, caffeine and tea polyphenols were much noted after extrusion than original tea stalk. The water extracts were the same lever while the content of carbohydrate increased. 48 kinds of aroma ingredients in tea stalk after extrusion were identified, 5 kinds less than those in original tea stalk. There were 5.28% phenethyl alcohol and 3.69% indole more in the expanding tea stalk than those in the original tea stalk, but there was 0.15% nerolidol less in expanding tea stalk.
Number of references:13
Main heading:Extrusion
Controlled terms:Agricultural products - Carbohydrates - Flavors - Phenols - Solvent extraction - Water content - Water quality
Uncontrolled terms:Aroma analysis - Aroma components - Before and after - Extrusion technology - Nerolidol - Phenethyl alcohol - Sensory evaluation - Tea polyphenols - Tea stalk - Water extracts
Classification code:822.3 Food Products - 821.4 Agricultural Products - 804.1 Organic Compounds - 802.3 Chemical Operations - 535.2.2 Metal Forming Practice - 453.2 Water Pollution Control - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.09.063
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 13>

Accession number:20104613383994Title:Development of automatic inspection system of corn seeds
Authors:Song, Peng (1); Zhang, Junxiong (1); Xun, Yi (2); Chen, Xiao (3); Li, Wei (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) College of Mechanical Engineering, Zhejiang University of Technology, Zhejiang Hangzhou 310023, China; (3) Mechanical and Electrical Engineering School, Beijing Information Science and Technology University, Beijing 100192, China
Corresponding author:Li, W.
      (liww@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:9
Issue date:September 2010
Publication year:2010
Pages:124-127
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Seed inspection is one of the most urgent problems in the development of China's seed industry. In this paper, A dynamic quality inspection and grading system of corn kernels was developed, the morphological features were used to divide corn kernels into four grades and the color features were used to grade corn kernels into three levels, the average grading ratio of system were respectively 81.8% and 93.04%; A maize varieties recognition system based on pattern recognition was developed, the system could realize Nongda 80, Nongda 108, Gaoyou115, Nongda 4967 and Bainuo 6 with a average recognition accuracy at 92%; A haploid maize grain grading system was developed, haploid maize seeds were recognized by color features and pattern recognition technology, and a 2 degrees of freedom parallel robot in suction mode was used to sorting with a sorting accuracy of 80%.
Number of references:14
Main heading:Pattern recognition systems
Controlled terms:Feature extraction - Grain (agricultural product) - Identification (control systems) - Image processing - Imaging systems - Inspection - Seed
Uncontrolled terms:Automatic inspection system - Classification - Color features - Corn kernels - Corn seeds - Degrees of freedom - Dynamic quality - Grading system - Maize haploid - Maize seeds  - Morphological features - Parallel robots - Pattern recognition technologies - Recognition accuracy - Recognition systems - Urgent problems - Variety identification
Classification code:716 Telecommunication; Radar, Radio and Television - 731.1 Control Systems - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 821.4 Agricultural Products - 913.3.1 Inspection
DOI:10.3969/j.issn.1002-6819.2010.09.020
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 14>

Accession number:20104613384034Title:Technology for aqueous extraction of camellia seed oil by salt effect
Authors:Guo, Yubao (1); Tu, Kang (2); Xue, Zhenglian (1); Ji, Changlu (1); Guo, Rui (1)
Author affiliation:(1) College of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu 241000, China; (2) College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Tu, K.
      (kangtu@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:9
Issue date:September 2010
Publication year:2010
Pages:362-367
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To improve the lower free oil yield triggered due to severe emulsification in aqueous extraction process of oil, new technology of aqueous extraction of camellia seed oil by salt effect was explored. With sodium carbonate solution as the extractant, effects of liquid-solid ratio, extraction time, extraction temperature and agitation speed on free oil yield of camellia seed oil were investigated, and parameter optimization of the main factors was carried out through Box-Behnken experimental design. Among the main factors, extraction temperature has the greatest effect on free oil yield, followed by liquid-solid ratio, and extraction time with the minimal effect. The optimal parameters of aqueous extraction of camellia seed oil by salt effect were as follows: liquid-solid ratio of 3.39 mL/g, extraction time of 1 h, extraction temperature of 65&deg;C, and agitation speed of 140 r/min. Under the optimal conditions, the free oil yield of camellia seed oil was up to 96.33%. It indicates that salt effects can significantly prevent the emulsion formation during aqueous extraction of camellia seed oil, and markedly improve the free oil yield. This method also provides a new strategy for other vegetable oils to obtain higher free oil yield.
Number of references:20
Main heading:Solvent extraction
Controlled terms:Chemical reactivity - Emulsification - Liquids - Optimization - Seed - Technology - Vegetable oils
Uncontrolled terms:Agitation speed - Aqueous extraction - Box-Behnken experimental design - Camellia seed oil - Emulsion formation - Extractants - Extraction temperatures - Extraction time - Free oil - Liquid solids  - Minimal effects - New strategy - New technologies - Optimal conditions - Optimal parameter - Parameter optimization - Salt effect - Seed oil - Sodium carbonate
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 921.5 Optimization Techniques - 901 Engineering Profession - 821.4 Agricultural Products - 804.1 Organic Compounds - 802.3 Chemical Operations - 801.1 Chemistry, General
DOI:10.3969/j.issn.1002-6819.2010.09.060
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 15>

Accession number:20104613383992Title:Optimization of parameters for delinted cottonseeds dielectric selection
Authors:Kan, Za (1); Gu, Chenchen (1); Wang, Lihong (1); Fu, Wei (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China; (2) Agricultural Machinery Key Laboratory of Xinjiang Bing Tuan, Shihezi 832003, China
Corresponding author:Gu, C.
      (guchenchen57@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:114-119
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to determine the operation parameters, use delinted cottonseeds dielectric selection, three parameters, namely, separation voltage, roller rotatation speed and the cotton seed moisture were selected as input variables, and the dielectric constant, cotton seed vigour and its index selected after the dielectric selection of the cotton seed as output parameters. A quadratic regression general experimental design was employed to develop the second order polynomial regression model, which explained the relationship between input and output parameters. An optimum combination of input parameters was obtained with the region of separation voltage 6000.00-6574.43 V, roller rotatation speed 30.08-34.38 r/min and the cotton seed moisture of 4%. Those are useful references for cottonseed delinting by dielectric selection.
Number of references:14
Main heading:Mathematical models
Controlled terms:Cotton - Moisture - Optimization - Regression analysis - Rollers (machine components) - Seed
Uncontrolled terms:Delinted cottonseed - Dielectric constants - Dielectric properthes - Experimental design - Input and outputs - Input parameter - Input variables - Operation parameters - Optimization of parameters - Optimum combination  - Output parameters - Quadratic regression - Second-order polynomial - Separation voltage - Three parameters
Classification code:601.2 Machine Components - 801.4 Physical Chemistry - 821.4 Agricultural Products - 921 Mathematics - 921.5 Optimization Techniques - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2010.09.018
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 16>

Accession number:20104613384011Title:Remote-sensing based monitoring of planting structure and growth condition of major crops in Northeast China
Authors:Huang, Qing (1); Tang, Huajun (1); Zhou, Qingbo (1); Wu, Wenbin (1); Wang, Limin (1); Zhang, Li (1)
Author affiliation:(1) Key Laboratory of Resource Remote Sensing and Digital Agriculture, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning of Chinese Academy of Agricultural Sci., Beijing 100081, China; (2) Hulunber Grassland Ecosystem Observation and Research Station, Beijing 100081, China
Corresponding author:Tang, H.
      (queengold@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:218-223
Language: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 main crops in Northeast China as an example, large-scale crop planting areas automatic identification methods were researched based on time-series of MODIS NDVI Datasets in this paper. The characteristics of NDVI time series of spring wheat, spring corn, soybeans and rice in Northeast China were firstly analyzed, and then the threshold values of extracting different crops were set and the extraction models of above-mentioned four kinds of crops were established, and finally the spatial distribution of these four crops of 2009 were obtained. MODIS data of Northeast China of 2009 were used to monitor the growth condition of the four kinds of crops, and the growth condition were compared with the average crop growth of last five years. The results showed that the extraction accuracy of crops planting structure was more than 87% compared with what with years of average statistical data, and crops growth condition showed different characteristics both in spatial and temporal. Research shows that it is feasible to extract different crops planting structure and monitor crops growth condition in large scale using MODIS data, which provides effective ways for large scale crops planting structure extraction in China agriculture remote sensing monitoring system.
Number of references:23
Main heading:Crops
Controlled terms:Automation - Condition monitoring - Radiometers - Remote sensing - Time series
Uncontrolled terms:Accuracy assessment - Growth - MODIS data - NDVI - Northeast China - Planting structure
Classification code:922.2 Mathematical Statistics - 821.4 Agricultural Products - 732 Control Devices - 944.7 Radiation Measuring Instruments - 731.1 Control Systems - 706 Electric Transmission and Distribution - 603 Machine Tools - 731 Automatic Control Principles and Applications
DOI:10.3969/j.issn.1002-6819.2010.09.037
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 17>

Accession number:20104613384021Title:Estimation model of leaf wetness duration based on canopy relative humidity for cucumbers in solar greenhouse
Authors:Li, Ming (1); Zhao, Chunjiang (1); Qiao, Shu (1); Qian, Jianping (1); Yang, Xinting (1)
Author affiliation:(1) National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (3) Key Laboratory for Information Technologies in Agriculture, Ministry of Agriculture, Beijing 100097, China; (4) College of Forestry, Beijing Forestry University, Beijing 100083, China
Corresponding author:Zhao, C.
      (zhaocj@nercita.org.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:286-291
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The leaf wetness duration (LWD) is a key input factor of disease warning systems for crops in solar greenhouses. The LWD estimation model based on canopy relative humidity (RH threshold model) is one of the easiest models. To calibrate and validate the model in real greenhouse conditions, the experiment was conducted in the solar greenhouse during late summer and early autumn with mini cucumber at fruit harvesting stage. The relative humidity (RH) data were obtained automatically at every five-minute interval. The trial-and-error method, average value method and the method based on frequency of leaf wetness were used to calibrate the RH threshold, and then RH thresholds were obtained including 90%, 89% and 93%, respectively. In addition, the calibration results were validated by root mean square error (RMSE), regression analysis and a series of error analysis indicators. The results showed that the estimation effects of trial-and-error approach and average value approach were better than the method based on frequency of leaf wetness, and the errors were around 1-2 h. Compared with the leaf wetness duration that was over 3 h, the monitoring effects of RH threshold model were acceptable. However, from the validation results, the estimation effects of average value approach were better than trial-and-error approach, which indicated that it was impossible to apply only one calibration method in practice. The calibration and validation methods and the estimation model of leaf wetness duration based on canopy relative humidity can be used for monitoring leaf wetness duration of cucumbers and meet the requirement of cucumber disease early warning systems in solar greenhouses.
Number of references:26
Main heading:Atmospheric humidity
Controlled terms:Calibration - Drilling - Error analysis - Estimation - Frequency estimation - Greenhouse effect - Greenhouses - Regression analysis - Solar heating
Uncontrolled terms:Cucumber - Leaf wetness durations - Relative humidities - Validation - Warning systems
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922.2 Mathematical Statistics - 921.6 Numerical Methods - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 921 Mathematics - 643.1 Space Heating - 604.2 Machining Operations - 443.1 Atmospheric Properties - 402.1 Industrial and Agricultural Buildings - 751 Acoustics, Noise. Sound
DOI:10.3969/j.issn.1002-6819.2010.09.047
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 18>

Accession number:20104613383985Title:Effects of rotational tillage treatments on soil structure and water storage in double rice cropping region
Authors:Sun, Guofeng (1); Zhang, Hailin (1); Xu, Shangqi (1); Cui, Siyuan (1); Tang, Wenguang (2); Chen, Fu (1)
Author affiliation:(1) Key Laboratory of Farming System, Ministry of Agriculture, College of Agronomy and Biotechnology, China Agriculture University, Beijing 100193, China; (2) Hunan Soil and Fertilizer Institute, Changsha 410125, China
Corresponding author:Chen, F.
      (chenfu@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:9
Issue date:September 2010
Publication year:2010
Pages:66-71
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:No-tillage (NT) is commonly used in paddy soil of southern China. However, the long-term NT has caused major problems of weed control, subsurface compaction, and so on, which are not beneficial for paddy rice growth. In order to solve these problems, field experiments of rotational tillage operations were set up in double rice cropping region in Hunan province, China. Compared with continuous NT, conventional tillage (CT) and rotary tillage (RT) were conducted in the paddy field under no-tillage for seven years in April, 2006. Then, one-half of the CT plot was converted to new NT, while the remaining half was left intact as continuous CT. Similarly, one-half of the RT plot was converted to new NT, while the remaining half was left intact as continuous RT in April, 2007.Hence, rotational tillage treatments were present each year on all five tillage treatments (NT-NT, CT-CT, CT-NT, RT-RT, and RT-NT). The same tillage methods were used for early and late rice. Results were showed as follow: Lower bulk density and higher capillary porosity of subsurface soil were measured under CT and RT practices compared with long-term NT soil. In contrast, bulk density of the surface soil tended to decrease with long-term NT. Furthermore, higher bulk density and lower capillary porosity of subsurface soil were observed under CT-NT or RT-NT compared with continuous CT or RT treatments, respectively. The field experiments clearly demonstrated that higher water storage of the arable soil layer was found under CT and RT practices compared long-term NT, especially for the lower water content of paddy soil. Compared with long-term NT, the means of water storage in the 0-20 cm soil layer increased with CT and RT by 12.9% and 20.7% in Oct-2007, respectively. Furthermore, the water storage tended to decrease with CT-NT or RT-NT compared with continuous CT or RT treatments, respectively. In addition, the significant negative linear correlation relationships between soil water content and bulk density, and positive linear correlation relationships between soil water content and capillary porosity were observed under rotational tillage treatments on the paddy soil. In all, CT and RT practices could improve the value of water storage of paddy soil by changing soil structure under long-term NT system.
Number of references:19
Main heading:Agriculture
Controlled terms:Agricultural machinery - Blood vessels - Moisture determination - Porosity - Soil moisture - Underwater soils - Water content - Weed control
Uncontrolled terms:Bulk density - Capillary - No tillage - Rotational tillage - Water storage
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 944.2 Moisture Measurements - 803 Chemical Agents and Basic Industrial Chemicals - 461.2 Biological Materials and Tissue Engineering - 444 Water Resources - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2010.09.011
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 19>

Accession number:20104613384026Title:Dynamic evolution of the ecological service value based on LUCC in Miyun Reservoir Catchment
Authors:Zheng, Jiangkun (1); Yu, Xinxiao (1); Jia, Guodong (1); Xia, Bing (1)
Author affiliation:(1) Key Laboratory for Soil and Water Conservation and Desertification Combating of Ministry of Edu., Institute of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
Corresponding author:Yu, X.
      (yuxinxiao@bjfu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:315-320
Language: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 value equivalent, the ecological services value of Miyun Reservoir Catchment was evaluated and predicted dynamically with land use data of four periods and the Markov model to realize ecological sustainable development of land use and land cover change. The results indicated that all types of land use turned to forest land gradually in a whole trend, with the conversion method from complex to simple, the strength from strong to weak during the four periods from 1972 to 2008. The total value of ecosystem services in 1987, 2000, 2008 and 2020 which were verified and predicted increased by 1.9%, 14.4%, 18.9% and 18.6%, respectively, than that in 1972. The ecological services value of forest accounted for more than 65% of the total value. Value summation of hydrological regulation, maintenance of biological diversity and soil conversation occupied about 50%. During the former three periods, forest was the dominant factor impacting the change of the ecosystem services value, grass was forecasted to turn to the dominant factor during 2008 to 2020.
Number of references:20
Main heading:Economic and social effects
Controlled terms:Catchments - Ecosystems - Land use - Landforms - Markov processes - Reservoirs (water) - Runoff
Uncontrolled terms:Biological diversity - Conversion methods - Dominant factor - Dynamic evolution - Ecological services - Ecosystem services - Ecosystem services value - Forest land - Land use and land cover change - Land use and land cover change (LUCC)  - Markov model - Miyun Reservoir - Total values
Classification code:922.1 Probability Theory - 481.1 Geology - 454.3 Ecology and Ecosystems - 971 Social Sciences - 444.1 Surface Water - 441.2 Reservoirs - 403 Urban and Regional Planning and Development - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.09.052
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 20>

Accession number:20104613384028Title:Spatial variability of soil fertility in Daxing District of Beijing
Authors:Cui, Xiaoxiao (1); Gao, Yuan (1); L&#252;, Yizhong (1)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
Corresponding author:L&#252;, Y.
      (lyz@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:9
Issue date:September 2010
Publication year:2010
Pages:327-333
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The objective of this study was to explore the spatial variability of soil fertility indices and soil fertility quality, and to provide guidance for soil fertilization management. Soil indices selected included soil organic matter, total N, available P, available K and pH value. Geostatistics method and fuzzy comprehensive evaluation method were used to analyze the data. The results showed that the C0/(C+C0) of organic matter, total N, available K and pH value were 0.38, 0.25, 0.29 and 0.50, respectively, which demonstrated moderate spatial dependence. The C0/(C+C0) of available P was 0.88, which demonstrated weak spatial dependence. Soil organic matter and total N decreased from north to south; available P decreased from southwest to northeast; available K decreased from southeast to northwest; pH value decreased from south to north. The fertility quality of Daxing District decreased from north to south. The five categories of fertility quality covered 0.21%, 6.35%, 20.95%, 29.45% and 43.04% of the total area, respectively. The third category, fourth category and fifth category covered 93.44% of the total area. The fertility quality of Daxing District was generally low, which was affected by soil texture and artificial cultivation management.
Number of references:34
Main heading:Soils
Controlled terms:Biogeochemistry - Biological materials - Fertilizers - Fuzzy set theory - Organic compounds - pH effects - Phosphorus - Potassium
Uncontrolled terms:Available P - Fuzzy comprehensive evaluation method - Geostatistics method - Organic matter - pH value - Soil fertility - Soil fertility index - Soil fertilization - Soil indices - Soil organic matters  - Soil textures - South-to-North - Spatial dependence - Spatial variability
Classification code:804.1 Organic Compounds - 804 Chemical Products Generally - 801.2 Biochemistry - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 801.1 Chemistry, General - 483.1 Soils and Soil Mechanics - 461.2 Biological Materials and Tissue Engineering - 549.1 Alkali Metals
DOI:10.3969/j.issn.1002-6819.2010.09.054
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 21>

Accession number:20104613384013Title:Analysis of evapotranspiration characteristics for different land covers over Songnen Plain based on remote sensing
Authors:Zeng, Lihong (1); Song, Kaishan (1); Zhang, Bai (1); Wang, Zongming (1); Du, Jia (1)
Author affiliation:(1) Northeast Institute of Geography and Agricultural Ecology, Chinese Acad. of Sci., Changchun 130012, China; (2) Graduate University of Chinese Acad. of Sci., Beijing 100049, China
Corresponding author:Song, K.
      (songks@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:9
Issue date:September 2010
Publication year:2010
Pages:233-242
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to accurate estimation of ET, in this study, the SEBAL model combined with MODIS products and observed weather data were used to estimate regional ET over Songnen Plain during the 2008 growing season (from May to September). When ET measured by eddy covariance system was used to verify the SEBAL model estimation accuracy, it was found that the trends of both ET calculated and observed were highly consistent, ET estimation error of the whole growing season was 18.26%. The results indicated that the ET retrieval method based on remote sending would meet the requirements of regional ET estimation. ET over Songnen in the growing season of 2008 ranged from 183 mm to 1003 mm and it increased from the southwest part to the east part and northeast part; average ET of each land cover type decreased in the order of: water-body &gt; woodland &gt; wetlands &gt; cropland &gt; built-up &gt; grassland. Finally, ET and precipitation were compared to analyze the water deficit condition; it was found that the average value of water deficit over Songnen Plain was 195.96 mm. In more than 97% of the whole study area, ET was greater than precipitation, it indicated that the ET process rely on groundwater and runoff to compensate for lack of precipitation to a large extent. The higher ET rate and relative lower precipitation in the growing season would do great influence on the ecological environment of Songnen Plain.
Number of references:24
Main heading:Landforms
Controlled terms:Ecology - Estimation - Evapotranspiration - Groundwater - Radiometers - Remote sensing - Water supply
Uncontrolled terms:Accurate estimation - Average values - Ecological environments - Eddy covariance systems - Estimation errors - ET process - Growing season - Land cover - Land-cover types - MODIS  - Retrieval methods - SEBAL - SEBAL model - Songnen plain - Study areas - Water deficits - Weather data
Classification code:921 Mathematics - 731.1 Control Systems - 481.1 Geology - 944.7 Radiation Measuring Instruments - 454.3 Ecology and Ecosystems - 444.2 Groundwater - 444.1 Surface Water - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2010.09.039
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 22>

Accession number:20104613383998Title:Optimum hydraulic design and model test of large-scale low-lift pump devices
Authors:Li, Yanjun (1); Yan, Hongqin (2); Ge, Qiang (3); Yang, Jingjiang (1); Yan, Dengfeng (3)
Author affiliation:(1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China; (2) Hydraulic Engineering Science and Technology Consultation Limited Company of Jiangsu Province, Nanjing 210029, China; (3) College of Energy and Power Engineering, Yangzhou University, Yangzhou 225009, China
Corresponding author:Li, Y.
      (lyj782900@yahoo.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:144-148
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on the mathematical models of the geometric contours of elbow inlet passage and siphon outlet conduit, the general software for hydraulic optimum design was developed with the geometrical parameters, and the geometric contours of elbow inlet passage and siphon outlet conduit could be drawn quickly in accordance with the principle that the average flow rate was gradually changing., and the optimum hump section of the siphon outlet conduit was theoretically analyzed. The hydraulic design of elbow inlet passage and siphon outlet conduit were optimized by the combination of one-dimensional design theory and the computational fluid dynamics (CFD) technique. For selecting an execellent model pump, detailed model tests of pump device were carried. Therefore, a high specific speed vane-type mixed-flow pump 211-80 model with high efficiency, good anti-cavitation performance and no instability running area was gained in the end. The pump device with the 211-80 model worked in a wide high-efficiency zone, and its maximum efficiency reached 79.62% at the net lift of 5.4 meters. The optimum design methods and model test results can offer the reference in large low-lift pumping station constructions.
Number of references:15
Main heading:Hydraulic machinery
Controlled terms:Computation theory - Computational fluid dynamics - Hydraulics - Inlet flow - Leakage (fluid) - Machine design - Mathematical models - Pumps - Siphons - Water piping systems
Uncontrolled terms:Cavitation performance - Detailed models - Geometrical parameters - High efficiency - High specific speed - Hydraulic designs - Maximum Efficiency - Mixed flow pump - Model pump - Model tests  - Optimum designs - Pumping stations
Classification code:921.6 Numerical Methods - 921 Mathematics - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 631 Fluid Flow - 618.2 Pumps - 601 Mechanical Design - 452.3 Industrial Wastes - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2010.09.024
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 23>

Accession number:20104613383993Title:Vitality property experiments of vegetable seeds coating with magnetic powder
Authors:Hu, Jianping (1); Qi, Chunhui (1)
Author affiliation:(1) Key Laboratory of Modern Agriculture Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Hu, J.
      (hujp@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:9
Issue date:September 2010
Publication year:2010
Pages:120-123
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To meet the needs of magnetic precision seeding, a magnetic powder coating made of talcum powder and iron powder was suggested. By the magnetic powder coating, cabbage seed and kohlrabi seed were magnetic granulate coated and magnetic treated. The experiment investigated that the combined influence, under the condition of external magnetic field, of different iron powder content in magnetic powder on the germination rate, the germination potential and the vital index of the cabbage seed and the kohlrabi seed. The experimentation indicated that coating with magnetic powder had inhibition for seed early germination, but if the iron powder was controlled in 30%, under the combined action of the magnetic field, the germinating rate and vital index were advanced, and the young seedling diathesis improved, meanwhile, the growth of seedling roots was promoted. Basing on the germinating rate, the germinating potential, the vital index and the young seedling diathesis from the experimentation, we can ensure that the optimum quantity of iron powder in magnetic powder for coating: cabbage seed was 20%, kohlrabi seed was 10%, both the intensity of magnetization magnetic field were 100 mT. The results provide a scientific basis for the promotion of the magnetic precise seeding technology.
Number of references:8
Main heading:Seed
Controlled terms:Experiments - Granulation - Iron powder - Iron powder metallurgy - Magnetic fields - Powder coatings - Steel powder metallurgy
Uncontrolled terms:Combined actions - External magnetic field - Germination potential - Germination rates - Magnetic coated - Magnetic powders - Magnetic treated - Precise seeding - Seedling roots - Vital index  - Vitality property
Classification code:901.3 Engineering Research - 821.4 Agricultural Products - 813.2 Coating Materials - 802.3 Chemical Operations - 701.2 Magnetism: Basic Concepts and Phenomena - 545.3 Steel - 545.1 Iron
DOI:10.3969/j.issn.1002-6819.2010.09.019
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 24>

Accession number:20104613383982Title:Effects of deficit irrigation on yield and water use efficiency of tomato in solar greenhouse
Authors:Wang, Feng (1); Du, Taisheng (1); Qiu, Rangjian (1); Dong, Pingguo (2)
Author affiliation:(1) Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China; (2) Institute of Water Resources and Hydropower Research, Wuwei 733000, China
Corresponding author:Du, T.
      (dutaisheng@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:9
Issue date:September 2010
Publication year:2010
Pages:46-52
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the optimal water-saving and high-efficient irrigation pattern of greenhouse tomato in arid region of Northwest China, an experiment was conducted on the solar greenhouse tomato under mulch furrow irrigation in 2008 for the effects of water deficit applied in different growth stages on yield and water use efficiency. The results showed that although water deficit in fruit maturation and harvesting stage could promote tomato mature and the coincidence of harvest period and market higher price phase, the yield decreased significantly. As total gross economic incomes was low, water stress in fruit maturation and harvesting stage was not an ideal irrigation pattern. However, on the basis of the CK treatment irrigation amount (21 mm), 2/3 normal irrigation amount decreased in vegetable growth stage, 1/3 irrigation amount decreased in flower appearing and fruiting stage, no water stress in fruit maturation and harvesting stage was the optimal irrigation pattern, i.e., 11 or 12 irrigations were applied with total water amounts of 200 to 210 mm during the total growth stage, and 170 to 180 t/hm² tomato market yield, also 31&times;10⁴ to 34&times;10⁴ RMB/hm² could be achieved. The water use efficiency and gross economic incomes per cubic meter evapotranspiration was 64-69 kg/m3 and 120-125 RMB/m³, respectively, with 40-50 mm irrigation water saved.
Number of references:20
Main heading:Water management
Controlled terms:Arid regions - Economic analysis - Fruits - Greenhouses - Harvesting - Irrigation - Optimization - Plants (botany) - Solar heating - Water conservation  - Water supply
Uncontrolled terms:Deficit irrigation - Fruit maturation - Furrow irrigation - Greenhouse tomatoes - Growth stages - Irrigation patterns - Irrigation waters - NorthWest China - Solar greenhouse - Tomato  - Water amount - Water deficits - Water stress - Water use efficiency - Water-saving - Yield
Classification code:921.5 Optimization Techniques - 911.2 Industrial Economics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 643.1 Space Heating - 461.9 Biology - 446.1 Water Supply Systems - 446 Waterworks - 444 Water Resources - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2010.09.008
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 25>

Accession number:20104613384030Title:Rapid detection of adulterated milk by low field-nuclear magnetic resonance coupled with PCA method
Authors:Jiang, Chao (1); Han, Jianzhong (1); Fan, Jiali (1); Tian, Shiyi (1)
Author affiliation:(1) Food Safety Key Lab. of Zhejiang Province, Department of Food Quality and Safety, Zhejiang Gongshang University, Hangzhou 310035, China
Corresponding author:Han, J.
      (Hanjz99@gmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:340-344
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The adulterated milk samples were tested by the CPMG sequence of the low field-nuclear magnetic resonance. In order to search for a method to analyze and process the sample data rapidly and effectively, principal component analysis (PCA) was used to monitor milk quality. Milk samples adulterated with water, salt, urea or soybean milk, reconstituted milk and pure milk were prepared for the LF-NMR testing and evaluation. The results showed that LF-NMR can be used to distinguish between pure milk and different kinds of adulterated milk. Pure milk, reconstituted milk and their mixed milk were an effective identification. There was effective identification among pure milk, reconstituted milk and their mixed milk. The application of LF-NMR in adulterated milk with different additive proportions showed the similar result, too. The PCA method can be used to analyze and process the test data of LF-NMR. LF-NMR coupled with PCA shows a greater potential in the evaluation of dairy products quality.
Number of references:15
Main heading:Principal component analysis
Controlled terms:Dairy products - Identification (control systems) - Nondestructive examination - Nuclear magnetic resonance - Quality control - Resonance - Urea
Uncontrolled terms:Adulterated milk - CPMG sequence - LF-NMR - Non destructive - Principal Components
Classification code:922.2 Mathematical Statistics - 913.3 Quality Assurance and Control - 822.3 Food Products - 932.2 Nuclear Physics - 804.1 Organic Compounds - 701 Electricity and Magnetism - 421 Strength of Building Materials; Mechanical Properties - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2010.09.056
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 26>

Accession number:20104613384029Title:Measurement of pork freshness by steady spatially-resolved spectroscopy
Authors:Wen, Xing (1); Liang, Zhihong (2); Zhang, Genwei (1); Huang, Lan (1); Wang, Zhongyi (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, Z.
      (wzyhl@cau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:334-339
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The objective of this work was to investigate the relationship between optical parameter of pork meat and meat freshness, and establish a fast non-invasive method to evaluate freshness. Based on principles of bio-photonics and steady spatially-resolved short wavelength near infrared spectroscopy, a multiple channel visible and near infrared spectrometer for determination of optical parameter was established, which could measure (or obtain) spectrum of effective attenuation coefficient during changes in pork meat freshness. In this work, the relationships between effective attenuation coefficient and traditional indexes, i.e. total volatile basic nitrogen (TVB-N) as an indicator of freshness, total plate count of bacteria and sensory indicators, were also investigated. The results showed that the variations in tissue structure influenced on scattering due to spoilage resulting in cells membrane damage and rupture; and effective attenuation coefficient of sample was significantly correlated to TVB-N value at 940 nm and 960 nm. The conclusion showed that the relationship between near infrared spectrometer and TVB-N value can be found to evaluate meat freshness.
Number of references:19
Main heading:Spectrum analysis
Controlled terms:Infrared spectrometers - Interferometry - Meats - Near infrared spectroscopy - Nitrogen - Optical variables control - Spectrometry - Spectrum analyzers
Uncontrolled terms:Basic nitrogen - Bio photonics - Effective attenuation - In-cell - Membrane damage - Multiple channels - N value - Near infrared spectrometer - Non destructive - Noninvasive methods  - Optical parameter - Pork meat - Short wavelengths - Steady spatially-resolved spectroscopy - Tissue structure - Total plate count - Visible and near infrared
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941.4 Optical Variables Measurements - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 822.3 Food Products - 804 Chemical Products Generally - 741.3 Optical Devices and Systems
DOI:10.3969/j.issn.1002-6819.2010.09.055
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 27>

Accession number:20104613383987Title:Effects of different tillage measures on soil and water conservation in slope farmland of red soil in Southern China
Authors:Xie, Songhua (1); Zeng, Jianling (2); Yang, Jie (1); Yuan, Fang (1)
Author affiliation:(1) Jiangxi Institute of Soil and Water Conservation, Nanchang 330029, China; (2) College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
Corresponding author:Yang, J.
      (zljyj@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:81-86
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The aim of the experiment is providing reference for solving the problem of soil and water erosion inslope farmland of red soil in Southern China, according to the field standard runoff plot methods, the effects of tillage measures such as down-slope tillage, cross-slope tillage and weed clearing in garden on soil and water conservation were studied by using 5 years monitored data. The results showed that the order of the test plots from superior to inferior was cross-slope tillage plot which rate was 75.33 percent, down-slope tillage plot which rate was 59.56 percent, weed clearing plot which rate was 21.73 percent in reducing runoff, and cross-slope tillage plot which rate was 80.57 percent, down-slope tillage plot which rate was 65.11 percent, weed clearing plot which rate was 38.08 percent in reducing sediment loss. The runoff from April to September was more than 85 percent of the annual total runoff, and the sediment loss was more than 90% of the annual total sediment loss. Interplanting to increase field covering is an effective measure to prevent water loss and soil erosion, and cross-slope tillage is superior to down-slope tillage.
Number of references:13
Main heading:Soil surveys
Controlled terms:Agricultural machinery - Erosion - Farms - Runoff - Sedimentology - Soil conservation - Soils - Water conservation
Uncontrolled terms:Effective measures - Interplanting - Red soils - Sediment loss - Slope farmland - Soil and water - Soil and water conservation - Soil erosion - Southern China - Tillage measures  - Water loss
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 821.1 Agricultural Machinery and Equipment - 481.1 Geology - 444 Water Resources - 407 Maritime and Port Structures; Rivers and Other Waterways - 444.1 Surface Water
DOI:10.3969/j.issn.1002-6819.2010.09.013
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 28>

Accession number:20104613384001Title:3-D finite element analysis of piston deformation under different operating conditions of diesel engine
Authors:Tong, Baohong (1); Zhang, Qiang (2)
Author affiliation:(1) School of Mechanical Engineering, Anhui University of Technology, Maanshan 243002, China; (2) Shougang Group Technical and Quality Department, Beijing 100041, China
Corresponding author:Tong, B.
      (bh_tong@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 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:In order to make a survey of the influences on piston deformation from operating conditions of diesel engine, 3-D finite element analysis of piston's deformation under different operating conditions was carried out combining with 4105 diesel engine. Results of simulation show that the deformation of the piston under the mechanical load will increase with the rising of diesel engine's load or rotating speed. And maximum deformation is near the edge of thrust side of piston skirt. Under thermal load, the deformation of the piston will also increase with the rising of diesel engine's load or rotating speed. However, influence from different rotating speed is not evident. And maximum deformation of the piston is near the edge of exhaust side of piston head. Analyzing result of influencing from the coupled thermal and mechanical load is similar to that from the mechanical load. The results are expected to provide supports for the further design and optimization of piston structure.
Number of references:11
Main heading:Engine pistons
Controlled terms:Deformation - Diesel engines - Engines - Finite element method - Rotating machinery - Rotation - Structural optimization - Thermal load - Thermoanalysis - Three dimensional
Uncontrolled terms:3D-finite element analysis - ANSYS - Coupled loads - Design and optimization - Mechanical loads - Operating condition - Piston heads - Piston skirts - Rotating speed
Classification code:921.6 Numerical Methods - 921.5 Optimization Techniques - 902.1 Engineering Graphics - 801 Chemistry - 643.1 Space Heating - 612 Engines - 601.1 Mechanical Devices - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2010.09.027
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 29>

Accession number:20104613384025Title:Farmland consolidation type zoning based on combination of grading factors
Authors:Guo, Lina (1); Zhang, Fengrong (1); Qu, Yanbo (1); Guan, Xiaoke (1); Zhu, Taifeng (1)
Author affiliation:(1) College of Resources and Environment, China Agricultural University, Beijing 100193, China
Corresponding author:Zhang, F.
      (zhangfr@cau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:308-314
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The purpose of this paper is to detailing the farmland zoning, and making the results suit to land scale, and then to improve the accuracy of farmland consolidation project. So basing on the results of the Agricultural Land Gradation, took the gradation unit for basic research unit, with the support of ARCGIS software, through analyzed the combined factors of CL and their combined types and the different limited strength of different types, we eventually zoning the farmland of Tianjin into three consolidation type zones. The results showed that there were 730 types of the CL combination and 42 species of the limiting factors combined type in Tianjin. Irrigation, organic matter and salinization were the relatively common limiting factors, key consideration was given to these three factors on farmland. Recent farmland consolidation should be arranged in Zone Three, and the main directions were water conservancy engineering construction and salinization governance; the long-term farmland consolidation should focus on Zone Two; although the Zone One had small area, it still needed soil and water conservation projects. This paper can play an important role in deepen the application of the farmland Gradation, and that study can rich the theory and method in Farmland type zoning, and then provide certain reference.
Number of references:27
Main heading:Farms
Controlled terms:Land use - Soil conservation - Water conservation - Zoning
Uncontrolled terms:Agricultural land - Basic research - Consolidation projects - Farmland - Gradation - Limited strength - Limiting factors - Organic matter - Small area - Soil and water conservation  - Theory and methods - Tianjin - Water conservancy
Classification code:403 Urban and Regional Planning and Development - 444 Water Resources - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.3 Agricultural Methods
DOI:10.3969/j.issn.1002-6819.2010.09.051
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 30>

Accession number:20104613384031Title:Inactivation of E.coli in fresh fruit juice using dielectric barrier discharge plasma (DBDP)
Authors:Lin, Xiangyang (1); Li, Yanhui (1); Huang, Binhong (1); Cheng, Yanling (2); Zhang, Hong (1); Zhu, Rongbi (1); Ruan, Roger (2)
Author affiliation:(1) College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China; (2) Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, United States
Corresponding author:Lin, X.
      (xylin@fzu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:345-349
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Non-thermal pasteurization processes can offer higher quality, better nutrition retention and more energy efficient compared with traditional thermal processes. In this paper, dielectric barrier discharge reactor (DBDR) was designed. And the bactericidal efficiency of low-temperature plasma (LTP) produced by DBDR on fresh juice and its impacts on the quality of juice were researched. The second order quadratic equation for DBDR inactivation was established by response surface methodology, and the effectiveness of this model was verified. Also, effects of cycles, pH value, temperature and voltage on DBDP sterilization of E.coli were discussed. Based on the exploration, the optimum conditions for inactivation of E.coli ATCC 8739 of seven log cycles were obtained as: 6 cycles, pH 3.14, temperature 39.72&deg;C, and voltage 21.42 kV. It lays a foundation for further studying on the DBDP sterilization law and the mechanism of sterilization. While the correlation coefficient R² for this model equals to 0.9817, the low-temperature plasma (LTP) produced by DBDR can be applied to other fruit and vegetable disinfection treatment and improve the quality and safty of fresh fruit and vegetable.
Number of references:22
Main heading:Quality control
Controlled terms:Dielectric devices - Disinfection - Electric discharges - Flow control - Fruit juices - Fruits - pH effects - Plasmas - Sterilization (cleaning) - Surface properties  - Thermal logging - Vegetables
Uncontrolled terms:Correlation coefficient - Dielectric barrier discharge plasmas - Dielectric barrier discharge reactors - Discharge - Disinfection treatments - E.coli - Energy efficient - Fresh fruits - Fruit and vegetables - Low temperature plasmas  - Non-thermal pasteurization - Optimum conditions - pH value - Quadratic equations - Response Surface Methodology - Second orders - Thermal process
Classification code:951 Materials Science - 801.1 Chemistry, General - 821.4 Agricultural Products - 822.2 Food Processing Operations - 822.3 Food Products - 913.3 Quality Assurance and Control - 932.3 Plasma Physics - 714 Electronic Components and Tubes - 701.1 Electricity: Basic Concepts and Phenomena - 631.1 Fluid Flow, General - 512.1.2 Petroleum Deposits : Development Operations - 462.1 Biomedical Equipment, General - 462 Biomedical Equipment - 704 Electric Components and Equipment
DOI:10.3969/j.issn.1002-6819.2010.09.0
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 31>

Accession number:20104613383988Title:Variability of soil moisture and its relationship with environmental factors on Karst hillslope
Authors:Zhang, Jiguang (1); Chen, Hongsong (2); Su, Yirong (2); Liang, Hongbo (1); Kong, Xiangli (4); Zhang, Wei (2)
Author affiliation:(1) Key Laboratory of Tobacco Quality Control, Ministry of Agriculture, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China; (2) Key Laboratory for Agro-Ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Acad. of Sci., Changsha 410125, China; (3) Huanjiang Experimental Station of Karst Ecosystem, Chinese Acad. of Sci., Huanjiang 547100, China; (4) College of Life Science and Resource Environment, Yichun University, Yichun 336000, China
Corresponding author:Chen, H.
      (hbchs@isa.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:87-93
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The aim of the experiment is exploring the influence of environmental factors, such as different land uses, topography and microgeomorphology, on the variability of soil moisture on Karst hillslope. The method of detrended canonical correspondence analysis (DCCA) was used to analyze surface soil moisture (0-15 cm) variability and its relationship with environmental factors on a typical hillslope in Karst region. The results showed that surface soil moisture ranged from 21.36% to 32.58% during the whole sampling periods, and had seasonal changes with middle variability. Soil moisture in different land uses had similar changes with time accompanied with four peak types. Soil moisture was the highest in natural vegetation field, followed in abandoned field and sloping field, and the lowest was in artificial forest. The DCCA ordination analysis indicated that soil depth, soil organic carbon, land use and bare rock ratio had the biggest effects on soil moisture variability and seasonal pattern on the hillslope. Soil density and slope had the less effects, and vertical position and height had the least effects. The sampling spacing and density of soil moisture should be increased, and aspect, curvature, upslope contributing area should also be considered in further studies according to the special physiognomy of Karst hillslope. Furthermore, these results suggested that combined with the soil nutrient characteristics of different land use on the hillslope, some feasible agricultural engineering measures and vegetation restoration modes should be developed on the degraded ecosystems on Karst hillslope in the future.
Number of references:25
Main heading:Soil moisture
Controlled terms:Agricultural engineering - Ecology - Land use - Landforms - Moisture determination - Organic carbon - Vegetation
Uncontrolled terms:Artificial forest - Canonical Correspondence Analysis - Contributing areas - Degraded ecosystems - Environmental factors - Hillslopes - Karst region - Moisture variability - Natural vegetation - Sampling period  - Seasonal changes - Seasonal patterns - Soil density - Soil depth - Soil nutrients - Soil organic carbon - Surface soil moisture - Variability - Vegetation restoration - Vertical positions
Classification code:944.2 Moisture Measurements - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 483.1 Soils and Soil Mechanics - 481.1 Geology - 454.3 Ecology and Ecosystems - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.09.014
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 32>

Accession number:20104613383975Title:Critical assessment indicators for measuring benefits of investment in rural infrastructure
Authors:Jiang, Shijie (1); Shen, Liyin (2); Peng, Yi (2); Yang, Jianwei (3)
Author affiliation:(1) Chongqing University of Science and Technology, Chongqing 401331, China; (2) Hong Kong Polytechnic University, Hong Kong, Hong Kong; (3) Anhui University of Science and Technology, Huainan 232001, China
Corresponding author:Jiang, S.
      (cqaj@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:1-7
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Rural infrastructure is critical to promote agriculture development, rural economy development and alleviate poverty in China. However, there was few assessment indicators for rural infrastructure investment. The research aims to introduced a set of critical assessment indicators (CAIs) for objectively evaluating the benefits of investment in rural infrastructure in China. Research data was collected from a questionnaire survey to three groups of experts including government, professionals and business involving in China's construction industry. The Monte Carlo Simulation (MCS) was used to analyze the data. Based on the simulation results, the Fuzzy Set Theory was used in establishing CAIs. Eight indicators was selected as CAIs for assessing rural infrastructure investment in China. The analysis demonstrated that MCS can mitigate the deficiencies of limited samples from questionnaire responses while fuzzy set theory can take into account the fuzziness in questionnaire survey. The selected indicators are echoed by other researchers' fragmentary study. The selected CAIs can help local government to make better decision when investing in rural infrastructure in China.
Number of references:34
Main heading:Investments
Controlled terms:Computer simulation - Construction industry - Cosmic ray detectors - Economics - Fuzzy logic - Fuzzy set theory - Fuzzy sets - Monte Carlo methods - Research - Surveys
Uncontrolled terms:Agriculture development - Assessment indicator - Critical assessment - Investment benefit - Local government - Monte Carlo Simulation - Questionnaire surveys - Research data - Rural economy - Rural infrastructure  - Simulation result
Classification code:921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 911.2 Industrial Economics - 901.3 Engineering Research - 922.2 Mathematical Statistics - 723.5 Computer Applications - 657 Space Physics - 405.3 Surveying - 405 Construction Equipment and Methods; Surveying - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
DOI:10.3969/j.issn.1002-6819.2010.09.001
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 33>

Accession number:20104613383976Title:Experimental study of nitrogen leaching pattern in controlled pipe-drainage cotton field
Authors:Yuan, Niannian (1); Huang, Jiesheng (1); Xie, Hua (1); Huang, Zhiqiang (1)
Author affiliation:(1) State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
Corresponding author:Huang, J.
      (jshuanga@public.wh.hb.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:8-13
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:In order to study nitrogen leaching patterns in cotton field under different drainage treatments, a field pipe controlled drainage experiment was conducted at Yajiao Drainage and Irrigation Experimental Station, Jingzhou City, Hubei Province, in 2008. Results showed that under controlled drainage, accumulation of nitrogen loss from surface drainage was larger than that from pipe drainage. Pipe drain outflow reduced by 61.3%-86.9% as the depth of the outlet declined. Nitrogen loss of pipe drainage was mainly influenced by drain outflow. Ammonia nitrogen loss reduced with rising of the drainage outlet depth. Due to increment of the nitrogen concentration, nitrate and total nitrogen loss of 30 cm treatment were larger than that of 50 cm and 80 cm treatments. Depth of drainage outlet was suggested to be between 30 cm and 50 cm, which could reduce both drain outflow and nitrogen loss.
Number of references:16
Main heading:Nitrogen
Controlled terms:Cotton - Leaching - Pipe
Uncontrolled terms:Ammonia nitrogen - Controlled drainage - Drainage outlet - Experimental stations - Experimental studies - Hubei Province - Nitrogen concentrations - Nitrogen leaching - Nitrogen loss - Pipe drains  - Surface drainage - Total nitrogen
Classification code:533.1 Ore Treatment - 619.1 Pipe, Piping and Pipelines - 804 Chemical Products Generally - 819.1 Natural Fibers
DOI:10.3969/j.issn.1002-6819.2010.09.002
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 34>

Accession number:20104613384009Title:Non-destructive measurement system for plant growth information based on machine vision
Authors:Ma, Zhiyu (1); Shimizu, Hiroshi (2); Gu, Song (1)
Author affiliation:(1) South China Agricultural University, Guangzhou 510642, China; (2) Kyoto University, Kitashirakawa Oiwake-Cho, Kyoto 606-8502, Japan
Corresponding author:Ma, Z.
      (mazhiyu2002@hotmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:203-209
Language: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 non-destructive measurement system for plural plants morphological characteristics of was developed and constructed. A CCD camera (Sony, XC-77) with an infrared filter and an 850 nm infrared LED lighting source was installed on a stepping motor (Oriental motor, DG130R-ASAA). The all plants images was captured and stored by rotated the stepping motor 20&deg; according to the time interval that can be preset to any interval 10 min was used in this study. The images that captured by infrared irradiation take the same level of intensity value during day and night. The reflective marker was attached at the node position of a plant; stem elongation up to the node position could be measured by tracking the reflective marker. The image analysis and measurements were performed using an image processing of area-based pattern matching technique. Plant stem node coordinates were computed by the image processing algorithms-the sub-pixel estimation on area-based matching technique. One of the problems in the pattern matching technique is determination of an appropriate reference image size. The result of the research shows that the measurement accuracy became raise if the reference window size is more than 15&times;15 pixel in this research. The system was used to measure the stem elongation of Chrysanthemum (Dendranthema&times;grandiflorum "Reangan"). In the research, the daily pattern of chrysanthemum stem elongation was constructed, and it was observed that the daily stem elongation was greater than that during the night.
Number of references:16
Main heading:Image matching
Controlled terms:Cameras - CCD cameras - Computer vision - Elongation - Imaging systems - Measurements - Pixels - Research - Stepping motors
Uncontrolled terms:A plants - Area-based - Area-based matching - Dendranthema - Image processing algorithm - Infra-red irradiation - Infrared filters - Intensity values - LED lighting - Machine vision  - Measurement accuracy - Morphological characteristic - Node coordinates - Non-destructive measurement - On-machines - Pattern-matching technique - Plant growth - Plant stems - Reference image - Stem elongations  - Sub pixels - Subpixel estimation - Time interval - Window Size
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 901.3 Engineering Research - 746 Imaging Techniques - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 742.2 Photographic Equipment - 741 Light, Optics and Optical Devices - 705.3 Electric Motors - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 741.2 Vision
DOI:10.3969/j.issn.1002-6819.2010.09.035
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 35>

Accession number:20104613384005Title:Model of relationships between planting industry mechanization degree and labor demand
Authors:Wang, Fulin (1); Suo, Ruixia (1); Zhang, Lin (1); Cang, Lei (1)
Author affiliation:(1) Engineering College, Northeast Agricultural University, Harbin 150030, China; (2) College of Economic Administration, Heilongjiang August First Land Reclamation University, Daqing 163319, China
Corresponding author:Wang, F.
      (wangfulin@netease.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:181-184
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, the relationship between plant industry mechanization degree and labor demand was proposed and researched. To improve agricultural mechanization theory and provide theoretical reference of scientifically estimate the quantities of the labor force in planting industry and surplus labor. The linear alternative relationship was pointed out while replacing farming workforce with farming machine units with the same type, the separability of mechanization degree was also proposed and proved in this paper. A model of relations between the farming mechanization degree and labor demand was established. The simulation results of the model show that it's not only the current amount of labor demand in a particular area that could be calculated, but also the amount of labor demand in the various moment in future could be calculated through forecasting mechanization degree and sown areas for the variety of crops in the future. Finally, an example was presented for demonstration purposes.
Number of references:16
Main heading:Mechanization
Controlled terms:Agricultural machinery - Computer simulation - Employment - Forecasting - Industry
Uncontrolled terms:Agricultural mechanization - Labor - Labor demands - Labor force - Relationships - Simulation result
Classification code:921 Mathematics - 913 Production Planning and Control; Manufacturing - 912 Industrial Engineering and Management - 911 Cost and Value Engineering; Industrial Economics - 821.1 Agricultural Machinery and Equipment - 723.5 Computer Applications - 601 Mechanical Design
DOI:10.3969/j.issn.1002-6819.2010.09.031
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 36>

Accession number:20104613383989Title:Phosphorus adsorption on the surface sediments of ditches in Hetao irrigation
Authors:Wei, Xinfeng (1); Ouyang, Wei (1); Hao, Fanghua (1); Zhang, Xuan (1); Wang, Yunhui (1); Xu, Yiming (1)
Author affiliation:(1) State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
Corresponding author:Hao, F.
      (fanghua@bnu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:94-100
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to understand the role of sediments in the phosphorus transformation in the north China. Overlying water and surface sediments samples were took from up, middle and down sample sites of Main canal, Huangji Tributary canal, Main drainage ditch and Second tributary drainage ditch. Then the concentration of soluble phosphorus and total phosphorus of overlying water were determined and the phosphorus fractions of sediments were analyzed. Moreover, adsorption kinetic and adsorption isotherm of the sediments were obtained. It found that phosphorus in the drainage ditch did not raised obviously. The content of phosphorus fractions ranged sequentially Calcium bound phosphorus &gt; Residual phosphorus &gt; Reductant Soluble phosphorus &gt; Aluminum bound phosphorus &gt; Soluble and Loosely bound phosphorus &gt; Iron bound phosphorus. Especially, the content of Soluble and Loosely bound phosphorus, Iron bound phosphorus and Aluminum bound phosphorus, which were easy to release to water, were very low and they were positively correlative with each other. It conclude that ditches are helpful in the phosphorus reduction, the risk of releasing phosphorus form sediment is high and the adsorption capacity of drainage ditch sediments is larger than that of canal sediments.
Number of references:29
Main heading:Phosphorus
Controlled terms:Adsorption - Aluminum - Hydraulic structures - Irrigation - Reduction - Sedimentology - Sediments - Sulfur compounds - Water content
Uncontrolled terms:Adsorption capacities - Adsorption kinetics - Ditch - Drainage ditches - Hetao irrigation - North China - Overlying water - Phosphorus adsorption - Phosphorus form - Phosphorus fractions  - Phosphorus transformations - Reductants - Soluble phosphorus - Surface sediments - Total phosphorus
Classification code:804 Chemical Products Generally - 802.3 Chemical Operations - 802.2 Chemical Reactions - 611 Hydroelectric and Tidal Power Plants - 821.3 Agricultural Methods - 541.1 Aluminum - 481.1 Geology - 444 Water Resources - 441 Dams and Reservoirs; Hydro Development - 483 Soil Mechanics and Foundations
DOI:10.3969/j.issn.1002-6819.2010.09.015
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 37>

Accession number:20104613384033Title:Effects of different high electrostatic field treatment on the color changes of tomato fruit
Authors:Wang, Yu (1); Di, Jianbing (1); Wang, Baogang (2); Li, Lite (3)
Author affiliation:(1) College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China; (2) Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry, Beijing 100093, China; (3) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, Y.
      (sxtgwy@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 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 effects of different factors on the storage of tomato fruit (cv. 'Zhaoyan 219') treated with high electrostatic field were investigated in this paper. Results showed that electric field strength, action direction, the electric charge conduct and dielectric constant of gasket materials affected significantly inhibited the course of color changes from green to red of tomato fruit, thus delayed ripening and senescence of postharvest fruit (P&lt;0.05). These factors should be considered more important. The fruit number and the metal material variation was not significant differences between samples and control group in the changes from green to red of fruit, so that the two foctors can be regarded as secondary factors. Priority design on main factor, ignore secondary factors in electrostatic field treatment during storage of tomato. In electrostatic field treatment on the storage of tomatoes, only choosing the appropriate main factors optimized electric field settings could prolong the storage period, and secondary factors of storage had no significant difference, which can failure of consideration.
Number of references:15
Main heading:Fruits
Controlled terms:Color - Colorimetry - Dielectric materials - Electric fields - Storage (materials)
Uncontrolled terms:Color changes - Control groups - Dielectric constants - Electric field strength - Electrostatic field - Field effects - Fruit numbers - Gasket materials - High electrostatic field - Metal materials  - Postharvest - Storage - Storage periods - Tomato fruits
Classification code:694.4 Storage - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 741.1 Light/Optics - 821.4 Agricultural Products - 941.4 Optical Variables Measurements
DOI:10.3969/j.issn.1002-6819.2010.09.059
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 38>

Accession number:20104613384004Title:Active control on the side tumbling of heavy vehicle based on model forecast
Authors:Xia, Jingjing (1); Chang, L&#252; (1); Hu, Xiaoming (1); He, Yong (1)
Author affiliation:(1) School of Traffic Engineering, Huaiyin Institute of Technology, Huaian 223001, China; (2) College of Mechanical Engineering, Tongji University, Shanghai 210804, China
Corresponding author:Xia, J.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:176-180
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to resolve the side tumbling of heavy vehicle, the active control method of the side tumbling based on the model forecast was advised. The side tumbling trend of the vehicle was forecasted by the vehicle roll model. The active control real-time of the vehicle side tumbling could be ensured. Combining the working characteristic of the air spring, the active control strategy was designed to actively control the side tumbling of a large bus by air suspension. The experiment was executed when vehicle speed was 80 km/h and steering wheel angle was 200&deg;, rigidity of the left air suspension raised by 12.9%, and the rigidity of the right air suspension decreased by 13.7%, the roll angle was stable at 3.9&deg;. Results show that the roll stability control ability of the heavy vehicle is improved, and the side tumbling crash is decreased.
Number of references:15
Main heading:Suspensions (components)
Controlled terms:Automobile suspensions - Forecasting - Rigidity - Vehicles
Uncontrolled terms:Active control - Active control methods - Air springs - Air suspension - Heavy vehicle - Roll angle - Roll stability - Steering wheel - Vehicle speed
Classification code:432 Highway Transportation - 601.2 Machine Components - 632.1 Hydraulics - 921 Mathematics - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2010.09.030
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 39>

Accession number:20104613384020Title:Production line and corollary equipment of biomass solid fuel
Authors:Yao, Zonglu (1); Tian, Yishui (1); Meng, Haibo (1); Zhao, Lixin (1); Huo, Lili (1)
Author affiliation:(1) Chinese Academy of Agricultural Engineering, Beijing 100025, China
Corresponding author:Meng, H.
      (newmhb7209@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:280-285
Language: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 production line and equipments of biomass forming fuel had been developed to solve the problem of coordination of equipment, adaptability of biomass resource and the reliability of key machine during producing the biomass forming fuel in China. The biomass forming fuel process method which can produce different biomass resource including crop straw and forest residue adapted two shatters method and the mixed method of continuous supply material and modulating supply material. The biomass pellet machine with forced feeding device and other equipment were designed. The production line of biomass forming fuel was established in Beijing. The test results showed that the rate of pellet was up to 98%, compared to single pellet mill, the productivity of production line increased by 17.3%, the economic benefit increased by 13.3%, the bulk density and particle density was also super to single pellet mill. Production line of the biomass forming fuel can reach to requirement and it can achieve industrialized and continuous production. It will accelerate the development of biomass forming fuel in China.
Number of references:17
Main heading:Biomass
Controlled terms:Equipment - Fuels - Pelletizing
Uncontrolled terms:Biomass pellet machine - Biomass pellets - Biomass resources - Bulk density - Continuous production - Economic benefits - Forest residue - Mixed method - Particle densities - Process methods  - Production line - Solid fuels - Test results
Classification code:522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 525.1 Energy Resources and Renewable Energy Issues - 802.3 Chemical Operations - 901 Engineering Profession
DOI:10.3969/j.issn.1002-6819.2010.09.046
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 40>

Accession number:20104613383990Title:Test and optimization of parameters for the storing device of plot seeder
Authors:Liu, Shuguang (1); Shang, Shuqi (3); Yang, Ranbing (3); Zheng, Yuenan (3); Zhao, Dajun (3); Zhao, Jianliang (3)
Author affiliation:(1) College of Engineering, Shenyang Agricultural University, Shenyang 110866, China; (2) College of Science and Technology, China Agricultural University (Yantai), Yantai 264670, China; (3) College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Corresponding author:Shang, S.
      (sqshang@qau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:101-108
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the seed scattered uniformity to storing device of plot seeder, it was taken as the research object in the paper. Influence of the three test factors (diameter of storing device (d), lifting height of storing device (h), motion velocity (v)) on the scattered uniformity about black sesame seed, Chinese cabbage seed, rape seed, wheat seed and soybean seed were analyzed by the orthogonal rotational combination experimental design. With DPS7.05 Data Processing System the regression equations of seed scattered uniformity on the three test factors were established. The effect order of three factors on each seed was obtained by the regression equations. Optimum parameters about structure and operational environment were established by analysis and under the respective optimum parameters the CV of the scattered uniformity about black sesame seed, Chinese cabbage seed, rape seed, wheat seed and soybean seed were 2.2121%, 1.0388%, 0.9198%, 2.6328%, 2.7188%, respectively. Under the same weight, the integral optimum parameters were as follows: diameter of storing device 0.0634 m, lifting height of storing device 0.013 m, motion velocity 1.4524 m/s and the best CV of the scattered uniformity about black sesame seed, Chinese cabbage seed, rape seed, wheat seed and soybean seed were 2.4741%, 1.3008%, 1.1818%, 2.6415%, 2.9808%, respectively. The study has certain practical value for improving the adaptability of storing device to seed and uniformity of sowing in the plot.
Number of references:15
Main heading:Seed
Controlled terms:Data processing - Experiments - Machinery - Structural optimization
Uncontrolled terms:Agicultural machinery - Optimizaion - Plot seeder - Scattered uniformity - Storing device
Classification code:601 Mechanical Design - 723.2 Data Processing and Image Processing - 821.4 Agricultural Products - 901.3 Engineering Research - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2010.09.016
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 41>

Accession number:20104613383980Title:Effects of salt crust on soil evaporation condition with saline-water drip-irrigation in extreme arid region
Authors:Zhang, Jianguo (1); Xu, Xinwen (2); Lei, Jiaqiang (2); Li, Shengyu (2)
Author affiliation:(1) Key Lab. for Agricultural Resources and Environmental Remediation in Loess Plateau, College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Xinjiang Institute of Ecology and Geography, Chinese Acad. of Sci., Urumqi 830011, China; (3) Graduate University, Chinese Acad. of Sci., Beijing 100039, China
Corresponding author:Xu, X.
      (sms@ms.xjb.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 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:Soil salt crust develops widely in the Trim Desert Highway Shelterbelt, and it has significant effect on soil water evaporation process. Field sample analysis and control experiment with Micro-Lysimeters were used to study soil evaporation process affected by salt crust during one irrigation cycle. The results showed that soil evaporation reduced gradually from soil surface downwards, and the evaporation from soil with salt crust was less than that without salt crust; daily evaporation reduced gradually with the decrease of soil water content, daily evaporation from soil with salt crust was higher than that without salt crust at earlier stage and lower at later stage; cumulative evaporation increased gradually, but rate of increment reduced gradually, and cumulative evaporation from soil with crust was less than that without salt crust; inhibition efficiency of salt crust on soil evaporation reduced gradually, but bare land reduced faster than shelterbelt; salt crust can inhibit soil evaporation effectively.
Number of references:17
Main heading:Saline water
Controlled terms:Arid regions - Evaporation - Irrigation - Landforms - Moisture determination - Soil moisture - Underwater soils - Water content
Uncontrolled terms:Bare lands - Control experiments - Desert highway shelterbelt - Evaporation process - Inhibition efficiency - Irrigation cycles - Salt crust - Sample analysis - Soil surfaces - Soil water content  - Soil water evaporation
Classification code:444 Water Resources - 481.1 Geology - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 821.3 Agricultural Methods - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2010.09.006
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 42>

Accession number:20104613383996Title:Theoretical analysis and experiments of metering performance of the pheumatic seed metering device
Authors:Liu, Wenzhong (1); Zhao, Manquan (2); Wang, Wenming (2); Zhao, Shijie (2)
Author affiliation:(1) College of Energy Resources and Communication, Inner Mongolia Agricultural University, Huhhot 010018, China; (2) College of Mechanical-Electrical Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China; (3) Mechanical-Electrical Engineering Department, Xingtai Vocational Technological College Xingtai Prefecture of Hebei, Xingtai 054035, China
Corresponding author:Zhao, M.
      (nmgzmq@yahoo.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:133-138
Language: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 pheumatic seed metering device is a key component of precision drill, which performance direct affect the quality of seeding. A theoretical analysis was conducted on the adsorption mechanism of the pheumatic seed metering device and an air flow field equation has been derived. An analytical calculation of the state of seed subjected to force under suction effect and the seed motion after breaking away from suction hole was carried out, and a seed motional equation was established. A single factor experimental of the pheumatic seed metering device on the soybean seeding process, taking the rotation speed of seed metering disk and the vacuum degree in suction chamber as experiment factors respectively, was carried out on the experiment stand. The experiment results show that: When the rotation speed of seed metering disk exceeds the one for the vacuum degree to suit for obtained by theoretical calculation, the performance quality gets worse and miss seeding rate evidently increases up to 29.63%; When the vacuum degree in suction chamber is 2.5 kPa, the miss seeding rate will increase up and the seeding rate up to standard appears descending tendency with the rotation speed of seed metering disk increasing; When the rotation speed of seed metering disk is kept at 54 r/min and the vacuum degree in suction chamber is higher than 1.5 kPa, the seeding rate up to standard ranges from 76.11% to 80.65%; When the vacuum degree in suction chamber is lower than 1.5 kPa, the seeding rate up to standard obviously decreases.
Number of references:13
Main heading:Seed
Controlled terms:Adsorption - Agricultural machinery - Disks (structural components) - Equations of motion - Equations of state - Experiments - Quality control - Rotation - Standards - Vacuum  - Vacuum technology
Uncontrolled terms:Adsorption mechanism - Air flow fields - Analytical calculation - Key component - Performance quality - Pheumatic - Rotation speed - Seed metering - Seed metering device - Seed metering devices  - Seeding process - Seeding rate - Theoretical calculations - Vacuum degree
Classification code:921.2 Calculus - 921 Mathematics - 913.3 Quality Assurance and Control - 902.2 Codes and Standards - 901.3 Engineering Research - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 802.3 Chemical Operations - 633 Vacuum Technology - 601.1 Mechanical Devices - 408.2 Structural Members and Shapes
DOI:10.3969/j.issn.1002-6819.2010.09.022
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 43>

Accession number:20104613383995Title:Effects of electric field processing and dielectric separation on cotton seed germination rate and seedling mass
Authors:Li, Fade (1); Zhang, Xiangang (1); Li, Xiuzhi (1); Wang, Houping (2)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai'an 271000, China; (2) Agricultural Machinery Administration of Tai'an, Shandong Province, Tai'an 271000, China
Corresponding author:Li, F.
      (li_fade@yahoo.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:128-132
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the effects of the electric field processing and dielectric separation on the germination rate and the seedling mass of coated cottons, an electric field processing test was conducted with an arista electrode at a voltage of -16 kV (DC). The results showed that the germination rate and the seedling mass of the cotton seed were significantly improved. In addition, a dielectric separation was performed with an dielectric separator at the different separating voltage, and the results also showed that the germination rate and the seedling mass of the Class A cotton seed significantly increased when the rotating speed of the separating roller was of 20 r/min and the selecting voltage was of -6 kV (DC). It was also found that both the germination rate and the seedling mass of the seed which was firstly processed with the electric field and then separated with the dielectric separator under the above optimum conditions were significantly higher than that of the seed which was solely processed with the electric field or separated with the dielectric separator. It will provide a foundation for developing a new processing and separating device, it has a great significance for agricultural production.
Number of references:14
Main heading:Seed
Controlled terms:Agriculture - Cotton - Dielectric properties - Electric fields - Separators
Uncontrolled terms:Agricultural productions - Class A - Dielectric separation - Effects of electric fields - Electric field processing - Germination rates - Optimum conditions - Rotating speed - Seed germination - Seedling mass
Classification code:701 Electricity and Magnetism - 701.1 Electricity: Basic Concepts and Phenomena - 802.1 Chemical Plants and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.09.021
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 44>

Accession number:20104613383979Title:Effects of mineralization of irrigation water and soil salinity on cotton emergence rate in Southern Xinjiang Uygur Autonomous Region of China
Authors:Wang, Chunxia (1); Wang, Quanjiu (1); Liu, Jianjun (1); Su, Lijun (1); Shan, Yuyang (2); Zhuang, Liang (3)
Author affiliation:(1) Institute of Water Resources, Xi'an University Technology, Xi'an 710048, China; (2) State Key Laboratory of Soil Erosion and Dry-Land Farming on the Loess Plateau, Yangling 712100, China; (3) Xinjiang Institute of Water Conservation and Hydraulic Power, Wulumuqi 830049, China
Corresponding author:Wang, Q.
      (wquanjiu@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:28-33
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:For investigating salt tolerance of cotton and its effect factors in Xinjiang Uygur Autonomous Region, the experiment were carried on salt tolerance of cotton under the condition of different mineralization of irrigation water and the soil salinity. Results indicated that the relationship between soil salinity or mineralization of irrigation water and the cotton relative emergence rate was linear. The mineralization of irrigation water was changed with the soil saline and alkaline degree. The mineralization of irrigation water was less 5 g/L when the soil salinity was hereinafter 0.33%, the mineralization of irrigation water was less than 3 g/L when the soil salinity was between 0.33% and 0.5%, and the irrigation water was fresh water when soil salinity exceeded 0.5%. Contrasting the two factors affected on emergence rate of the cotton, the results indicated in the medium grade and hereinafter saline-alkaline soil, the effect was bigger in the mineralization of irrigation water than soil salinity. Combining investigation of cotton emergence rate in field, the results indicated that the critical mineralization of irrigation water was 4.28 g/L, and the cotton salt tolerance was 0.58% in soil. The study provides reference for further research of salt tolerance of cotton, and possesses great significance in directing local cotton production.
Number of references:16
Main heading:Irrigation
Controlled terms:Cotton - Mineralogy - Saline water - Salinity measurement - Salts - Soils - Water supply
Uncontrolled terms:Alkaline soils - Cotton production - Effect factors - Fresh Water - In-field - Irrigation waters - Relative emergence rate - Salt tolerance - Soil salinity - Xinjiang Uygur autonomous region  - Xinjiang Uygur Autonomous Region of China
Classification code:821.4 Agricultural Products - 821.3 Agricultural Methods - 804.1 Organic Compounds - 483.1 Soils and Soil Mechanics - 482 Mineralogy - 446.1 Water Supply Systems - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.09.005
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 45>

Accession number:20104613384035Title:High intensity pulsed electric fields assisted extraction of lycopene from tomato residual
Authors:Jin, Shenglang (1); Yin, Yongguang (2)
Author affiliation:(1) Tourism College, Huangshan University, Huangshan 245021, China; (2) College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China
Corresponding author:Jin, S.
      (jinshenglang@hsu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:368-373
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The high intensity pulsed electric fields (HIPEF) method was assisted in extracting lycopene from tomato residual. The optimal processing conditions were acquired by the single-factor experiment and the orthogonal experiment, and then comparative extraction tests were performed among the HIPEF-assisted extraction method, the organic solvents extraction method, the ultrasonic-assisted extraction method, and the microwave-assisted extraction method. The results show that with the shortest time (16 &mu;s), the highest extraction rate 96.7% by lycopene was achieved under the following conditions: extraction solvent being ethyl acetate, electric field intensity 30 kV/cm, electric pulse number 8, liquid-stuff ratio 9 mL/g, temperature 30&deg;C and single-stage extraction. Extraction rate of HIPEF-assisted extraction method is 2.4 times as much as that of the organic solvents extraction method, 1.04 times of the ultrasonic-assisted extraction method, and 1.23 times of the microwave-assisted extraction method. HIPEF-assisted extraction method is proved to be a new and fast way to extract lycopene from the tomato residual.
Number of references:15
Main heading:Solvent extraction
Controlled terms:Electric fields - Engineering exhibitions - Esters - Fruits - Organic solvents - Ultrasonics
Uncontrolled terms:Electric field intensities - Electric pulse - Ethyl acetates - Extraction method - Extraction rate - Extraction solvents - High-intensity pulsed electric fields - Lycopenes - Microwave-assisted extraction - Optimal processing  - Orthogonal experiment - Single stage - Tomato residual
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 753.1 Ultrasonic Waves - 802.3 Chemical Operations - 804.1 Organic Compounds - 821.4 Agricultural Products - 901.2 Education
DOI:10.3969/j.issn.1002-6819.2010.09.061
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 46>

Accession number:20104613384023Title:Evaluation and change of arable land economic value based on land consolidation
Authors:Wang, Ailing (1); Hu, Jilian (2); Liu, Wenpeng (3); Li, Ying (1); Ji, Guangwei (1)
Author affiliation:(1) College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China; (2) Economy and Management College, Shandong Agricultural University, Tai'an 271018, China; (3) Bureau of Land and Resource of Laiwu City, Shandong Province, Laiwu 271100, China
Corresponding author:Wang, A.
      (ailingwang@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:9
Issue date:September 2010
Publication year:2010
Pages:296-300
Language: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 evaluation of arable land economic value is part of land consolidation work, which results from the basis of economic benefit appraisal for arable land. Taking Lixin Land Consolidation (LC) Project of Laiwu City as an example, combining GIS technology, field survey with in-door analysis, index system, evaluation methods of arable land economic valuation and the change in economic valuation based on LC were studied. The results indicated that grade spacial distribution, area and total valuation of arable land economic value changed much before and after LC. Before LC, arable land was mainly dry land and was graded 2, 3 and 4, which occupied 87.20% of total arable land area, and land of grade 1 was little. Arable land was converted into vegetable land and irrigable land and grades of arable land economic value were basically 1 and 2 after LC, which occupied 99.88% of total arable land area. Total arable land economic value after LC was 1.286 times before LC and LC economic benefit was prominent. The method has instructive significance for arable land economic evaluation of LC, and the results may provide scientific basis for economic benefit appraisal of Lixin LC Project.
Number of references:13
Main heading:Land use
Controlled terms:Economic analysis - Planning - Regional planning - Value engineering
Uncontrolled terms:Arable land - Before and after - Dry land - Economic benefits - Economic evaluations - Economic valuation - Economic values - Evaluation Method - Field surveys - GIS technology  - Index systems - Land consolidations - Value change
Classification code:403 Urban and Regional Planning and Development - 403.2 Regional Planning and Development - 911.2 Industrial Economics - 911.5 Value Engineering
DOI:10.3969/j.issn.1002-6819.2010.09.049
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 47>

Accession number:20104613384015Title:Soil spatial information management system based on WebGIS and barcode technology
Authors:Guo, Wushi (1); Yi, Xin (1); Chen, Yunping (2); Wang, Xiu (3)
Author affiliation:(1) Department of Computer Science Technology, Sichuan Engineering Technical College, Deyang 618000, China; (2) School of Automation, University of Electronic Science and Technology of China, Chengdu 611731, China; (3) National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Chen, Y.
      (chenyp@uestc.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 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:To the need of soil fertility survey in precision agriculture, a soil spatial information management system was developed in the paper, which could integrate soil sampling, testing, storage, spatial data management and release under a loose-coupling system. The system can manage the process of soil sampling, testing and storage based on barcode as well as release spatial data based on WebGIS. Furthermore, the synchronization problem of Heterogeneous Database had been resolved by using web service technology. Application in practice shows that the system design concept and architecture can meet the need of precision agriculture information acquisition, information management, while it also has a good prospect on the large-scale soil survey and soil monitoring.
Number of references:12
Main heading:Information management
Controlled terms:Agriculture - Bar codes - Soil surveys - Soil testing - Soils - Web services
Uncontrolled terms:Barcode technology - Coupling systems - Heterogeneous database - Information acquisitions - Precision Agriculture - Process of soil - Soil fertility - Soil monitoring - Soil sample - Soil sampling  - Spatial data - Spatial data management - Spatial informations - Synchronization problem - System design - Web service technology - Web-GIS
Classification code:483.1 Soils and Soil Mechanics - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 903.2 Information Dissemination
DOI:10.3969/j.issn.1002-6819.2010.09.041
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 48>

Accession number:20104613383986Title:Models of soil and water conservation and ecological restoration in the loess hilly region of China
Authors:Dang, Xiaohu (1); Liu, Guobin (2); Xue, Sha (2)
Author affiliation:(1) School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China; (2) Institute of Soil and Water Conservation, MWR, Chinese Acad. of Sci., Yangling 712100, China; (3) Institute of Water Resources and Hydro-Electric, Xi'an University of Technology, Xi'an 710048, China
Corresponding author:Liu, G.
      (gbliu@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:9
Issue date:September 2010
Publication year:2010
Pages:72-80
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:Ecological degradation characterized by severe soil erosion and water loss is the most imposing ecological-economic issue in the Loess Hilly Region; the soil and water conservation (SWC) and ecological restoration are crucial solutions to this issue. It is of importance to explore SWC models for ecological reconstruction compatible with local socioeconomic and environmental conditions. The paper reviewed on SWC and ecological rehabilitation researches and practices and mainly concerned on eight small-scale (small catchments) models and Yan'an Meso-scale model in the Loess Hilly Region. To evaluate the environmental and socioeconomic impacts of these models, their validities were examined using the participatory rural appraisal. The results indicated that SWC and ecological restoration at different scales have played important roles both in local economic development and environmental improvement and provided an insight into sustainable economic development on the Loess plateau in the future. Furthermore, this paper strengthens our belief that, under improved socioeconomic conditions, SWC and ecological reconstruction can be made sustainable, leading to a reversal of the present ecological degradation.
Number of references:28
Main heading:Ecology
Controlled terms:Catchments - Degradation - Economics - Geologic models - Restoration - Soil conservation - Soils - Water conservation
Uncontrolled terms:Different scale - Ecological reconstruction - Ecological rehabilitation - Ecological restoration - Economic issues - Environmental conditions - Environmental improvements - Local economic development - Loess Plateau - Mesoscale  - Participatory rural appraisals - Small catchment - Socio-economic conditions - Socio-economic impacts - Soil and water conservation - Soil erosion - Sustainable economic development - SWC-oriented ecological farming - The Loess Hilly Region of China - Water loss
Classification code:802.2 Chemical Reactions - 483.1 Soils and Soil Mechanics - 481.1 Geology - 971 Social Sciences - 454.3 Ecology and Ecosystems - 409 Civil Engineering, General - 402 Buildings and Towers - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.09.012
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 49>

Accession number:20104613384000Title:Chain separator parameter optimization for the pot seedling of sugar beet
Authors:Zhao, Zuowei (1); Chen, Haitao (1); Lai, Qinghui (1); Ren, Keke (1)
Author affiliation:(1) College of Engineering, Northeast Agriculture University, Harbin 150030, China
Corresponding author:Chen, H.
      (haitao1963@yahoo.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:154-158
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:The chain separator parameters optimization for the pot seedling of sugar beet was optimized., and the structure and working principle of the separator were introduced. A central composite rotatable orthogonal experimental design of response surface methodology was employed for finding the optimum combination effecting on the separator properties. Three parameters, the guide speed, speed ratio and angle of separating wheel were selected as input variables, and the separation efficiency, the seedling damage were used as response functions. Experimental results indicated that the optimum combination region of the guide speed was 78-93 mm/s, the speed ratio was 6-7 and angle of separating wheel was 13&deg;. Its separation efficiency attained more than 95% and simultaneously the seedling damage was less than 6%. The study provides a foundation for the chain separator on the pot seeding of sugar beet.
Number of references:12
Main heading:Sugar beets
Controlled terms:Optimization - Separators - Sugar (sucrose) - Wheels
Uncontrolled terms:Central composite - Input variables - Optimum combination - Orthogonal experimental design - Parameter optimization - Parameters optimization - Response functions - Response Surface Methodology - Separating device - Separation efficiency  - Speed ratio - Three parameters - Working principles
Classification code:601.2 Machine Components - 802.1 Chemical Plants and Equipment - 821.4 Agricultural Products - 822.3 Food Products - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2010.09.026
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 50>

Accession number:20104613384008Title:Method of non-destructive measurement for plant leaf area and its instrument development
Authors:Nie, Pengcheng (1); Yang, Yan (1); Liu, Fei (1); Zheng, Jintu (4); He, Yong (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China; (2) School of Information Engineering, Nanchang Hangkong University, Nanchang 330069, China; (3) School of Mathematical Sciences, Guangxi Teachers Education University, Nanning 530023, China; (4) Ningbo Extension Center for Forestry Sciences, Ningbo 315010, China
Corresponding author:Nie, P.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:198-202
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A new leaf area measuring instrument was developed by using poly-Si photoelectric sensor board and uniform lighting slab with light source systems for the fast, nondestructive and accurate measurement of plant leaf area. Back propagation neural networks were used to develop the relationships between leaf area index and light intensity, leaf transmittance, environmental temperature, voltage values of photoelectric sensor board. The results indicated that this instrument could measure the leaf area with different shape, thickness and softness. The determination coefficient (R²) between the measured and predicted values was 0.98, and the measuring accuracy was 94.8%. It was concluded that a new measuring method and instrument were developed for the detection of leaf area.
Number of references:17
Main heading:Neural networks
Controlled terms:Instruments - Light sources - Photoelectricity - Polysilicon - Sensors - Wireless networks
Uncontrolled terms:Accurate measurement - Back propagation neural networks - Determination coefficients - Environmental temperature - Instrument development - Leaf area - Leaf Area Index - Light intensity - Measuring accuracy - Measuring instruments  - Measuring method - Non destructive - Non-destructive measurement - Photoelectric sensors - Plant leaf - Poly-Si - Source systems
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 801 Chemistry - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 744 Lasers - 723.4 Artificial Intelligence - 722.4 Digital Computers and Systems - 712.1.1 Single Element Semiconducting Materials - 741.1 Light/Optics
DOI:10.3969/j.issn.1002-6819.2010.09.034
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 51>

Accession number:20104613383991Title:Effects of maize seed grading on sowing quality by pneumatic precision seed-metering device
Authors:Liu, Jia (1); Cui, Tao (1); Zhang, Dongxing (1); Yang, Li (1); Gao, Nana (1); Wang, Bo (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Zhang, D.
      (zhangdx@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:9
Issue date:September 2010
Publication year:2010
Pages:109-113
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This paper aims to study the effects of maize seed grading on precise sowing quality. Maize seeds were divided into four levels according to the shape and size. Tests on pneumatic and vacuum precise seeder were carried out to investigate the effects on sowing quality such as up to standard reseeding and miss-seeding etc. The experiment results indicated that the pneumatic seeder is more adaptable to the seed size and shape variation. Maize seed grading obviously affects the qualified index and reseeding index, but affects miss-seeding index and coefficient of variation little on condition that all the indexes reach the sowing quality requirements. The qualified index of round seeds was 96%, which was higher than flat seeds with the qualified index was 87.4%. There was great distinction between them. The sowing quality of vacuum seeder was not so good whether the seed graded or not, and has not significant influence on the whole indexes of it. The experiment also shows that pneumatic seeder has better performance than the vacuum seeder.
Number of references:14
Main heading:Seed
Controlled terms:Agricultural machinery - Experiments - Grading - Pneumatic materials handling equipment - Pneumatics - Vacuum
Uncontrolled terms:Coefficient of variation - Maize seeds - Precision seed-metering device - Quality requirements - Seed size - Seed-metering device - Shape and size - Sowing quality
Classification code:913.3 Quality Assurance and Control - 901.3 Engineering Research - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 633 Vacuum Technology - 632.4 Pneumatic Equipment and Machinery - 632.3 Pneumatics
DOI:10.3969/j.issn.1002-6819.2010.09.017
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 52>

Accession number:20104613384002Title:Numerical analysis of compression combustion and reaction components of diesel fuel with various injection modes
Authors:Fan, Qianwang (1); Li, Liguang (1); Chen, Yichuan (1); Shi, Kun (1); Deng, Jun (1); Hu, Zongjie (1)
Author affiliation:(1) School of Automotive Studies, Tongji University, Shanghai 201804, China
Corresponding author:Li, L.
      (liguang@tongji.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:164-170
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Combustion characteristics and the variation of in-cylinder key reaction species for DI-diesel engines with such three injection combustion modes as normal injection, split injection and early injection, were investigated by adopting the CFD simulation technique. The results showed that the calculated values of in-cylinder pressure kept in agreement with experimental ones in references, the validity of the model was verified. The in-cylinder pressure with the early injection combustion mode was the highest, the split injection combustion mode took the second place, and the traditional injection combustion mode was the lowest. Among four species (H, N, OH and O) generated inside in-cylinder combustion process, the amount of OH strength was the highest, the N strength and the O strength took the second place, whereas the H strength was the lowest. Hence, it could be concluded that the OH strength was the critical one in the combustion reaction. Besides, the split injection combustion mode was more favorable to improve power, realize stable combustion and reduce emissions compared with the other two modes. The study provides the diesel compression combustion characteristics, and the correlation of reaction species and combustion process under various injection combustion modes.
Number of references:17
Main heading:Combustion
Controlled terms:Computer simulation - Diesel engines - Diesel fuels - Fuel injection - Numerical analysis - Numerical methods - Straw
Uncontrolled terms:Calculated values - CFD simulations - Combustion characteristics - Combustion mode - Combustion pro-cess - Combustion reactions - Cylinder pressures - In-cylinder combustion - Injection mode - Key reactions  - Reaction species - Split injection - Turbulent combustion
Classification code:521 Fuel Combustion and Flame Research - 521.1 Fuel Combustion - 612.2 Diesel Engines - 723.5 Computer Applications - 821.5 Agricultural Wastes - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2010.09.028
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 53>

Accession number:20104613384022Title:Ethanol production from wet oxidized corn straw by simultaneous saccharification and fermentation
Authors:Zhang, Qiang (1); Yin, Yongguang (1); Thygesen, Anders (3); Thomsen, Anne Belinda (3)
Author affiliation:(1) College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China; (2) School of Life Science and Technology, Changchun University of Science and Technology, Changchun 130022, China; (3) Biosystems Division, Ris DTU, Technical University of Denmark, Roskilde 4000, Denmark
Corresponding author:Yin, Y.
      (biofood@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:9
Issue date:September 2010
Publication year:2010
Pages:292-295
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to find out the appropriate process for ethanol production from corn straw, alkaline wet-oxidation pretreatment (195&deg;C, 15 min, Na<inf>2</inf>CO<inf>3</inf> 2 g/L, O<inf>2</inf> 1200 kPa) and simultaneous saccharification and fermentation (SSF) were adopted to produce ethanol. The results showed that 90% of cellulose remained in the solid fraction and recovery of cellulose was 95.87% after pretreatment. After 24 h hydrolysis at 50&deg;C using cellulase, the achieved conversion of cellulose to glucose was about 67.6%. After 142 h of SSF with substrate concentration of 8%, ethanol yield of 79.0% of the theoretical was obtained. The estimated total ethanol production was 262.7 kg/t raw material by assuming the consumption of both C-6 and C-5. No obvious inhibition effect occurred during SSF. These offered experiment evidences for ethanol production from corn straw.
Number of references:15
Main heading:Ethanol
Controlled terms:Cellulose - Fermentation - Glucose - Oxidation - Saccharification - Sodium
Uncontrolled terms:Corn straws - Ethanol production - Ethanol yield - Inhibition effect - Oxidation pre-treatment - Pre-Treatment - Simultaneous saccharification and fermentation - Solid fraction - Substrate concentrations - Wet oxidation
Classification code:523 Liquid Fuels - 549.1 Alkali Metals - 802.2 Chemical Reactions - 804.1 Organic Compounds - 815.1.1 Organic Polymers
DOI:10.3969/j.issn.1002-6819.2010.09.048
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 54>

Accession number:20104613384010Title:Method of winter wheat planting area estimation based on support vector machine and post-classification changed vector analysis
Authors:Li, Lingling (1); Pan, Yaozhong (1); Zhang, Jinshui (1); Song, Guobao (1); Hou, Dong (1)
Author affiliation:(1) State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
Corresponding author:Zhang, J.
      (zhangjsh@ires.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:210-217
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The crop phenology characristics can greatly improve estimation of planted area while using remote sensed technologies. Taking Southeast Beijing as the study area in this paper, the support vector machine (SVM) dichotomy model and post-classification changed vector analysis (PCVA) model were integrated to estimate winter wheat area. The results indicate that as follows: The overall pixel accuracy and Kappa coefficient resulted from this proposed method were 95% and 0.90, which were much better than those from post-classification comparison method (91% and 0.79). The combining of SVM and PCVA models also presented a good help on the selection of changing threshold value which tended to be subjective. Besides, with the polarization phenomenon of the frequency histogram in this method, it decreased the partial frequency of change threshold value and led to a lower threshold sensitivity, thus the determination of threshold value was more objective. The combining use of SVM and PCVA models was more sensitive to spectral changes, and improved the detection of crop growth change under different growing stages, as well as the estimating accuracy on winter wheat planted area. It is believed that this method also has a great potential for other crops planted area estimates.
Number of references:16
Main heading:Vectors
Controlled terms:Crops - Estimation - Remote sensing - Spectroscopy - Support vector machines
Uncontrolled terms:Dichotomy - Mixed method - Post classification - Support vector machine (SVM) - Winter wheat
Classification code:723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 801 Chemistry - 821.4 Agricultural Products - 921 Mathematics - 921.1 Algebra
DOI:10.3969/j.issn.1002-6819.2010.09.036
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 55>

Accession number:20104613384018Title:Experimental study on spraying disinfection with neutral electrolyzed water in a layer breeding farm
Authors:Zheng, Weichao (1); Li, Baoming (1); Shang, Yuchao (1); Wang, Chaoyuan (1); Yang, Zhanyong (2); Cao, Wei (1)
Author affiliation:(1) Key Laboratory of Structure and Environment in Agricultural Engineering, Ministry of Agriculture, China Agricultural University, Beijing 100083, China; (2) Shijiazhuang Huamu Animal Husbandry Co. Ltd., Shijiazhuang 050061, China
Corresponding author:Cao, W.
      (caowei@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:9
Issue date:September 2010
Publication year:2010
Pages:270-273
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Environmental issues are becoming the main cause of severe animal diseases, which greatly restricts the promotion of animal husbandry. Regular disinfection in animal farms is an important measure to prevent epidemic diseases. Due to the limitation of strong acidic electrolyzed water with a strong acidity (pH&lt;2.7), corrosion of equipment, high cost and unsuitable application in practice, the spraying disinfection effects of neutral electrolyzed water (NEW, pH 6.5-8.5) for inactivating the bacteria in a layer breeding farms were investigated and compared with the commonly used chemical disinfectants (peroxyacetic acid and povidone-iodine). The effects of available chlorine concentration, treatment time and nozzle diameter on the bactericidal efficiency of NEW were also determined. The results showed that the bactericidal efficiency of NEW was higher than that of peroxyacetic acid and povidone-iodine under different treatment time. The bactericidal activity of NEW was increased with increasing the available chlorine concentration. NEW sprayed with a smaller nozzle diameter of 50 &mu;m can improve the action efficiency of available chlorine and then increase the bactericidal effect for inactivation of bacteria in the air. Spraying NEW with available chlorine greater than 160 mg/L for maintaining 5 min (the fan turned off after spraying) is appropriate for disinfection in layer breeding houses. Therefore, NEW may be an alternative to chemical disinfectants used in spray disinfection in poultry farms, which will be play an important role in safety of animal production.
Number of references:17
Main heading:Fumigation
Controlled terms:Acids - Animals - Bactericides - Bacteriology - Chemical equipment - Chlorine - Diseases - Disinfectants - Disinfection - Electrochemistry  - Electrolysis - Epidemiology - Experiments - Farms - Houses - Industrial chemicals - Iodine - Nozzles - pH effects
Uncontrolled terms:Acidic electrolyzed waters - Animal disease - Animal husbandry - Animal production - Bactericidal activity - Bactericidal effects - Chemical disinfectants - Chlorine concentration - Commonly used - Electrolyzed water  - Environmental issues - Epidemic prevention - Experimental studies - High costs - Layer breeding farms - Nozzle diameter - Peroxyacetic acid - Poultry farms - Poultry house - Treatment time
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.1 Chemical Plants and Equipment - 901.3 Engineering Research - 801 Chemistry - 462 Biomedical Equipment - 461 Bioengineering and Biology - 402.3 Residences - 631.1 Fluid Flow, General
DOI:10.3969/j.issn.1002-6819.2010.09.044
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 56>

Accession number:20104613384017Title:Design of whole process tracking and traceability platform of broilers safety production
Authors:Chen, Changxi (1); Zhang, Hongfu (1); Fei, Xiejingwei (2); Wang, Yiding (3)
Author affiliation:(1) Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (2) Dept. of Computer Science, Tianjin Agriculture University, Tianjin 300384, China; (3) Dept. of Information science Technology, Tianjin University of Finance and Ecomomics, Tianjin 300222, China
Corresponding author:Zhang, H.
      (zhanghf6565@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:9
Issue date:September 2010
Publication year:2010
Pages:263-269
Language: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 research background of national broilers industry technology system, the whole process tracking and traceability platform of broilers safety production was developed, which includes chicks production subsystem, broilers production subsystem, broilers slaughter and processing subsystems, broilers storage and transportation subsystem, broilers sales subsystem, system administration subsystem and the inspection and quarantine subsystem and a site system for every subsystem login, consumer inquiries and information releasing of system administration. Object-oriented system analysis was carried out based on UML, and architecture of Java EE was adopted. Following the thought of software engineering, Java and Action script3.0 language, SQL Server 2005 DBMS and Apache Tomcat 6.0 Web server was used in the design of the traceability platform. The real-time video communication module developed by Flex technology can realize online consulting and diagnosis. The platform can track and trace all broilers-related information, from the production, slaughter, processing, cold chain storage, and transport to sales. Traceability platform also possesses early-warning function of broiler breeding epidemic and chicken quality safety, and when quality problem of chicken products appears, concrete units and persons can be found. The traceability platform, from all the aspects of production management, ensures the safety of chicken products.
Number of references:20
Main heading:Accident prevention
Controlled terms:Animals - Computer software - Concrete products - Design - Health - Industrial management - Industrial research - Java programming language - Systems analysis
Uncontrolled terms:Broilers - Cold chain - Early warning - Food safety - Object-oriented system - Online consulting - Production management - Quality problems - Quality safety - Real-time video communication  - Safety production - SQL Server 2005 - System administration - System design - Technology system - Traceability - Track and Trace - Web servers - Whole process
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 822 Food Technology - 912.1 Industrial Engineering - 912.2 Management - 914.1 Accidents and Accident Prevention - 914.3 Industrial Hygiene - 961 Systems Science - 814 Leather and Tanning - 408 Structural Design - 412 Concrete - 461 Bioengineering and Biology - 461.6 Medicine and Pharmacology - 471 Marine Science and Oceanography - 723 Computer Software, Data Handling and Applications - 723.1.1 Computer Programming Languages
DOI:10.3969/j.issn.1002-6819.2010.09.043
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 57>

Accession number:20104613384032Title:Model of inactivation kinetics of pressure resistant strains in low acid food by ultra-high pressure processing
Authors:Lu, Rongrong (1); Qian, Ping (2); He, Hongyan (1); Yu, Jianyong (2); Qi, Weimin (1); Zhang, Xiaojuan (2); Chen, Xiao (1)
Author affiliation:(1) School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (2) Quartermaster Equipment Inst. of the General Logistical Dept. of Chinese People's Liberation Army, Beijing 100010, China
Corresponding author:Lu, R.
      (lurr@jiangnan.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:350-356
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:The ultra-high pressure inactivation models of pressure resistant strains in low acid food were studied in order to describe and predict the inactive effects. Four kinds of spores from spoilage strains (Bacillus subtilis, Bacillus licheniformis, Bacillus stearothermophilus and Desulfotomaculum nigrificans) were inactivated under 300-500 MPa, and their survival curves were determined at selected time intervals. Weibull and traditional linear models were used to describe the ultra-high pressure inactivation model. Three criteria, accuracy factor (A<inf>f</inf>), mean square error (MSE) and regression coefficients (R²) were used to compare the linear and Weibull models. The results suggested that Weibull model fitted well at 300-500 MPa (R²&gt;0.9), while the linear model could be applied only at 300 MPa (R²&lt;0.83). The equation of Weibull would be beneficial to the food industry in selecting optimum combinations of pressure and time to obtain the desired target levels of bacterial inactivation.
Number of references:16
Main heading:Organic polymers
Controlled terms:Acids - Bacteriology - High pressure effects - Mean square error
Uncontrolled terms:Bacillus licheniformis - Bacillus stearothermophilus - Bacillus Subtilis - Bacterial inactivation - Desulfotomaculum nigrificans - Food industries - Inactivation kinetics - Inactivation models - Linear model - Optimum combination  - Pressure-resistant - Regression coefficient - Spores - Survival curves - Target levels - Time interval - Ultrahigh pressure - Weibull - Weibull models
Classification code:461.9 Biology - 731.1 Control Systems - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 815.1.1 Organic Polymers - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2010.09.058
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 58>

Accession number:20104613384007Title:Positioning algorithm for ultrasonic scanning of fruit tree canopy and its tests
Authors:Zhang, Lin (1); Zhao, Zuoxi (1); Yu, Long (1); Zhang, Zhigang (1); Huang, Jian (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, Guangzhou 510642, China; (2) College of Engineering of South China Agricultural University, Guangzhou 510642, China
Corresponding author:Zhao, Z.
      (zhao_zuoxi@hotmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:192-197
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, true geodetic coordinates of the detection point was derived using data provide by AHRS (attitude and heading reference system), RTK-DGPS and ultrasonic sensors, where position and attitude angles of the vehicle body, installation position offsets and angle offsets of ultrasonic sensors relative to the vehicle body were taken into consideration. The algorithm consisted of some coordinate transformation formula to obtain the detection points in the geodetic coordinates. Tests were conducted to examine the algorithm, including a straight line driving test on brick-scattered uneven road, which was used to verify the effectiveness of the correction model, and some field tests of tree canopies. Experimental results showed that the correction model (algorithm), which used the body attitude and position information, correctly transformed any point on the body into geodetic frame, and any point on the canopy detected by the ultrasonic sensor into geodetic frame, and ensured the true canopy shape could be measured regardless of body attitude changes and sensor installation offsets.
Number of references:12
Main heading:Ultrasonic applications
Controlled terms:Algorithms - Automobile bodies - Geodesy - Geodetic satellites - Global positioning system - Orchards - Trees (mathematics) - Ultrasonic sensors - Ultrasonics
Uncontrolled terms:Attitude angle - Canopy - Correction models - Direction cosine - GPS
Classification code:921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 821.3 Agricultural Methods - 753.3 Ultrasonic Applications - 753.1 Ultrasonic Waves - 723 Computer Software, Data Handling and Applications - 716.3 Radio Systems and Equipment - 663.2 Heavy Duty Motor Vehicle Components - 405.3 Surveying
DOI:10.3969/j.issn.1002-6819.2010.09.033
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 59>

Accession number:20104613383997Title:Metering performance of the vibrational vacuum precision tray seeder
Authors:Yang, Mingjin (1); Qiu, Bing (1); Yang, Ling (1); Chen, Zhonghui (1)
Author affiliation:(1) College of Engineering and Technology, Southwest University, Chongqing 400715, China
Corresponding author:Yang, L.
      (yangling1st@yahoo.com.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:139-143
Language: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 studying the metering performance of the vibrational vacuum precision tray seeder, according to aerodynamics theory, combined with physical properties of rice seeds, the pick-up process and pick-up performance of the seeder were analyzed. Based on vibration theory, the motions of seeds in thin layers and in thick layers were analyzed as well. The vibration conditions under which seeds are to be throwing were related to vibration frequency, vibration amplitude of the seeds plate, and thickness of seeds in the plate, and stronger vibration intensity required for seeds was as seed layer became thicker. For hybrid rice metering, the depression of air in the chamber increased rapidly with decrease of the nozzle diameter while the diameter was lower than 1 mm, and the depression increased rapidly with increase of distance from nozzle opening and while the opening was higher than 1 mm. The test results indicated that the precision tray seeder fully met the agronomic requirements with qualified rate of seeding 97.7%.
Number of references:17
Main heading:Vibration analysis
Controlled terms:Agricultural machinery - Diseases - Nozzles - Pickups - Vacuum
Uncontrolled terms:Metering performance - Nozzle diameter - Rice seed - Seed layer - Test results - Thick layers - Thin layers - Tray seeders - Vibration amplitude - Vibration condition  - Vibration frequency - Vibration intensity - Vibration theory - Vibrations
Classification code:461.7 Health Care - 631.1 Fluid Flow, General - 633 Vacuum Technology - 752.3.1 Sound Reproduction Equipment - 821.1 Agricultural Machinery and Equipment - 943.2 Mechanical Variables Measurements
DOI:10.3969/j.issn.1002-6819.2010.09.023
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 60>

Accession number:20104613383981Title:Numerical simulation of soil water movement with drip irrigation of multiple point source
Authors:Zhang, Lin (1); Wu, Pute (1); Fan, Xingke (1)
Author affiliation:(1) College of Water Resource and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (3) National Engineering Research Center for Water Saving Irrigation at Yangling, Yangling 712100, China
Corresponding author:Wu, P.
      (gjzwpt@vip.sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:40-45
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to provide the theory guidance for drip system design to the high density planting crop, based on the theory of unsaturated soil water dynamics and the character of soil water movement with drip irrigation from multiple point sources, the mathematic model was established and solved numerically by using the Hydrus software. Compared with the actual infiltration process, the simulated infiltration process is in agreement with actual infiltration process. The infiltration processes include three stages which are infiltration from point source, wetting front overlapped and forming wetting belt. The deviation of time of wetting front overlapped and infiltration depth between simulated and actual processes is less than 10%. There is a little difference between simulated and actual soil water content before wetting front overlapped. After wetting front overlapped, simulated soil water content is less than actual soil water content in the upper part of wetting zone. Generally speaking, simulated results can reflect the regulation of soil water movement with drip irrigation from line source, and it can provide the theory guidance for drip system design.
Number of references:18
Main heading:Geologic models
Controlled terms:Irrigation - Moisture determination - Numerical analysis - Seepage - Soil mechanics - Soil moisture - Underwater soils - Water content - Wetting
Uncontrolled terms:Drip irrigation - Drip system - High density - Infiltration process - Line sources - Mathematic model - Multiple points - Numerical simulation - Point sources - Simulated results  - Soil water content - Soil water movement - Three stages - Unsaturated soil - Wetting fronts
Classification code:944.2 Moisture Measurements - 931.2 Physical Properties of Gases, Liquids and Solids - 921.6 Numerical Methods - 821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 481.1 Geology - 444 Water Resources - 441 Dams and Reservoirs; Hydro Development - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2010.09.007
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 61>

Accession number:20104613384027Title:Model of urban land-use spatial optimization based on particle swarm optimization algorithm
Authors:Ma, Shifa (1); He, Jianhua (1); Yu, Yan (3)
Author affiliation:(1) School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China; (2) Key Laboratory of Geographic Information System, Ministry of Education, Wuhan University, Wuhan 430079, China; (3) School of Resource and Environmental Engineer, Wuhan University of Technology, Wuhan 430070, China
Corresponding author:He, J.
      (hjianh@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:321-326
Language: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 optimization of land-use structure is the core issue of land use planning, including the optimization of quantity and spatial allocation. The existed optimization models such as multi-objective, linear programming, gray system and landscape ecology, etc., are unable to realize quantitative and spatial optimization simultaneously. This paper created a land use spatial optimization model based on the particle swarm optimization algorithm, which had efficient spatial evolution simulate capabilities and robust algorithm. Case study illustrates that this model could be used to stimulate the landscape pattern and its evolution by designing appropriate spatial distribution pattern of particles group, which could integrate the quantity structure optimization into land use spatial evolution simulation.
Number of references:18
Main heading:Particle swarm optimization (PSO)
Controlled terms:Algorithms - Biology - Computer simulation - Ecology - Geographic information systems - Information systems - Land use - Linear programming - Mathematical models - Multiobjective optimization  - Site selection - Structural optimization
Uncontrolled terms:Geographic information - Gray system - Land Use Planning - Landscape ecology - Landscape pattern - Multi objective - Optimization models - Particle swarm - Particle swarm optimization algorithm - Robust algorithm  - Spatial allocation - Spatial distribution patterns - Spatial evolution - Spatial optimization - Spatial optimization model - Structure optimization
Classification code:921.5 Optimization Techniques - 921 Mathematics - 903.2 Information Dissemination - 723.5 Computer Applications - 723.3 Database Systems - 461.9 Biology - 454.3 Ecology and Ecosystems - 403 Urban and Regional Planning and Development - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2010.09.053
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 62>

Accession number:20104613383999Title:Structure design and experiments on the water distribution of the variable-rate sprinkler with non-circle nozzle
Authors:Yuan, Shouqi (1); Wei, Yangyang (1); Li, Hong (1); Xiang, Qingjiang (1)
Author affiliation:(1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Yuan, S.
      (shouqiy@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:9
Issue date:September 2010
Publication year:2010
Pages:149-153
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the irrigation quality and reduce the investment of sprinkler irrigation systems engineering, a new type of variable-rate sprinkler were developed by using activity pieces and non-circle nozzle devices on an impact sprinkler. The structure and working principle were presented. Experimental test was conducted to compared the hydraulic performances of variable-rate sprinkler with non-circle nozzle and circle nozzle. Three-dimensional water distribution and radial water distribution were plotted by using MATLAB. Results showed that the variable-rate sprinkler with non-circle nozzle was able to operate reliably. A triangular wetted area was obtained. And the influence of operation pressure fluctuation on spraying uniformity was reduced. Compared with traditional variable-rate sprinkler, the variable-rate sprinkler with non-circle nozzle has better hydraulic performance. The measured average application intensity was &rho;&macr;=6.74 mm/h. The conclusion is that non-circle nozzle can improve the water distribution uniformity of variable-rate sprinkler effectively.
Number of references:16
Main heading:Nozzle design
Controlled terms:Hydraulics - Sprinkler systems (irrigation) - Water supply systems
Uncontrolled terms:Hydraulic performance - Non-circle nozzle - Structure design - Variable rate - Water distribution uniformity
Classification code:408 Structural Design - 446.1 Water Supply Systems - 632.1 Hydraulics - 821.1 Agricultural Machinery and Equipment
DOI:10.3969/j.issn.1002-6819.2010.09.025
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 63>

Accession number:20104613384003Title:Numerical simulation of biomass gas and tar torrential flow characteristics in cyclone separator
Authors:Dong, Yuping (1); Dong, Lei (1); Qiang, Ning (1); Jing, Yuanzhuo (1); Guo, Feiqiang (2)
Author affiliation:(1) Key Laboratory of High Efficiency and Clean Mechanical Manufacture Ministry of Education, Shandong University, Ji'nan 250061, China; (2) Shandong Baichuan Tongchuang Energy Company Ltd., Ji'nan 250101, China
Corresponding author:Guo, F.
      (shandaguofeiqiang@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:9
Issue date:September 2010
Publication year:2010
Pages:171-175
Language: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 settle the tar particle problem in eliminating tar from biomass gas by cyclone separator, the RSM model and DPM model were used to simulate three-dimensional strong rotating turbulent field in the cyclone separator. Contours of flow field in the cyclone separator were obtained, including dynamic pressure, turbulent kinetic energy, turbulence viscosity and velocity vector. The influence of the main factors in the cyclone separator on tar separating was analyzed. The results could provide reference for the improvement and optimization of the cyclone separator.
Number of references:20
Main heading:Cyclone separators
Controlled terms:Biomass - Kinetic energy - Storms - Tar - Three dimensional - Turbulence
Uncontrolled terms:Biomass gas - Dynamic pressures - Flow characteristic - Numerical simulate - Numerical simulation - Turbulent fields - Turbulent kinetic energy - Velocity vectors
Classification code:902.1 Engineering Graphics - 804 Chemical Products Generally - 802.1 Chemical Plants and Equipment - 525.1 Energy Resources and Renewable Energy Issues - 931.1 Mechanics - 524 Solid Fuels - 443.3 Precipitation - 443.1 Atmospheric Properties - 411 Bituminous Materials - 513 Petroleum Refining
DOI:10.3969/j.issn.1002-6819.2010.09.029
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.