<RECORD 1>

Accession number:20114714541954
Title:Secondary fuzzy comprehensive evaluation model for ecosystem health of irrigation district and its application
Authors:Fang, Yanxu (1); Yang, Peiling (1); Song, Sulan (1); Du, Jun (1); Xue, Yandong (1); Su, Yanping (1)
Author affiliation:(1) College of Water Conservancy and Civil Engineering, China Agriculture University, Beijing 100083, China
Corresponding author:Yang, P.(yangpeiling@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:199-205
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The unreasonable development of traditional irrigation district has an adverse effect on the ecosystem environment. Therefore, a new ecological model of irrigation district is needed urgently to meet the requirement of the sustainable development of irrigation district. In this paper, the connotation of the ecosystem health of irrigation district was studied. According to the connotation of the ecosystem health of irrigation district and the principle of index selection, four independently typical sensitivity indices were adopted in order to develop an evaluation index system of ecosystem health of irrigation district. The four indices included the structure attribute, the environmental element, the integrated function element and the social and economical element of ecosystem of irrigation district. A secondary fuzzy comprehensive evaluation method based on the integration of analytic hierarchy process and fuzzy mathematics was used to develop an evaluation model of ecosystem health of irrigation district. The model was applied in the Beiyechang reclaimed water irrigation district in Beijing. Results showed that the model reasonably well represented the status of ecosystem health of Beiyechang reclaimed water irrigation district. Thus the model can evaluate ecosystem health of irrigation district.
Number of references:23
Main heading:Ecosystems
Controlled terms:Analytic hierarchy process - Fuzzy set theory - Fuzzy sets - Health - Irrigation - Models - Wastewater reclamation
Uncontrolled terms:Adverse effect - Ecological models - Ecosystem environment - Ecosystem health - Evaluation index system - Evaluation models - Fuzzy comprehensive evaluation - Fuzzy comprehensive evaluation method - Fuzzy mathematics - Index selection  - Integrated function - Irrigation districts - Re-claimed water - Sensitivity indices - Traditional irrigation
Classification code:921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 914.3 Industrial Hygiene - 902.1 Engineering Graphics - 821.3 Agricultural Methods - 454.3 Ecology and Ecosystems - 454.2 Environmental Impact and Protection
DOI:10.3969/j.issn.1002-6819.2011.11.038
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 2>

Accession number:20114714541963
Title:Determining dry weight of cucumber fruit in greenhouse based on rapid non-destructive testing
Authors:Ma, Wanzheng (1); Mao, Hanping (1); Li, Zhongfang (2); Wang, Yan (3); Ni, Jiheng (1)
Author affiliation:(1) Key Laboratory of Modern Agricultural Equipment and Technology, Min. of Edu. and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China; (2) Institute of Technology, Anhui Science and Technology University, Fengyang 233100, China; (3) College of Urban Construction and Environment, Anhui Science and Technology University, Fengyang 233100, China
Corresponding author:Mao, H.(maohp@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:247-251
Language: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 obtain the experimental data which was high-precision, continuity and from the same sample for establishing dynamic models to simulate the growth and development of cucumber in greenhouse. Aiming at researching the dry weight of cucumber fruit in greenhouse by rapid non-destructive testing (RNDT), with the experiment data of cucumber fruit under four kinds of nutrient solution concentration, a simulation model of dry weight was developed based on the relationship among dry weight, fresh weight and fruit volume. The results showed that the determination coefficients (R²) under four kinds of nutrient solution concentration between the predicted values and the measured values were 0.987, 0.993, 0.925, 0.96 respectively, and the root mean squared error (RMSE) under four kinds of nutrient solution concentration between the predicted values and the measured values were 0.281, 0.607, 0.616 and 0.502 respectively. The predicted values were consistent with the data of experiments. So dry weight of any cucumber fruit are non-destructively, simply, quickly and accurately predicted with this model and this model can provide reference for establishing models of dry mass allocation of cucumber in greenhouse.
Number of references:15
Main heading:Computer simulation
Controlled terms:Concentration (process) - Experiments - Fruits - Greenhouses - Models - Nondestructive examination - Nutrients
Uncontrolled terms:Cucumber - Determination coefficients - Dry mass - Dry weight - Experiment data - Experimental data - Fresh weight - Growth and development - High-precision - Non destructive testing  - Nutrient solution - Nutrient solution concentration - Root mean squared errors - Simulation model
Classification code:421 Strength of Building Materials; Mechanical Properties - 723.5 Computer Applications - 802.3 Chemical Operations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 901.3 Engineering Research - 902.1 Engineering Graphics
DOI:10.3969/j.issn.1002-6819.2011.11.047
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 3>

Accession number:20114714542769
Title:Effects of chlorine dioxide on postharvest rots control and preservation of Lanzhou lily bulb
Authors:Gong, Huiling (1); Wang, Xiaomin (2); Yuan, Huijun (1); Feng, Zaiping (1)
Author affiliation:(1) College of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730000, China; (2) College of Life Science, Lanzhou University, Lanzhou 730000, China
Corresponding author:Gong, H.(gonghl@lut.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:359-364
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to develop a new fresh-keeping technique of eatable lily bulb, the effects of chlorine dioxide (ClO<inf>2</inf>) treatment on postharvest rots and fresh-keeping of Lanzhou lily bulb (Lilium davidii var.unicolor) were studied during storaged at (-3&plusmn;1)&deg;C. The results showed that the rot rate significantly reduced after Lanzhou lily bulb was treated with different concerntration of ClO<inf>2</inf> for 1 hour. 6 mg/L ClO<inf>2</inf> treatment decreased the rot rate to the lowest level, which lowered respiration rate, inhibited the increase of the titration acid content and the malondialdehyde content, and prohibited the loss of vitamin C and soluble sugar, maintained the quality of lily bulb. The fresh-keeping effect was decreased if treated by lower or higher concentration of ClO<inf>2</inf>.These data suggest that ClO<inf>2</inf> treatment(6 mg/L) may be used as preservative in the practical application of lily storage and transportation.
Number of references:24
Main heading:Quality control
Controlled terms:Agricultural products - Aldehydes - Chlorine - Energy storage - Sugars - Wood preservation
Uncontrolled terms:Acid content - Chlorine dioxide - Chlorine dioxides - Lanzhou lily - Malondialdehyde - Postharvest - Respiration rate - Soluble sugars - Vitamin C
Classification code:702 Electric Batteries and Fuel Cells - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.4 Agricultural Products - 913.3 Quality Assurance and Control
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 4>

Accession number:20114714541928
Title:Simulation and experiment of electro-hydraulic braking system of construction vehicles
Authors:Lin, Muyi (1); Yao, Guangwei (1); Qu, Wenfeng (1)
Author affiliation:(1) Mechanical and Electronic Engineering School, Beijing Information Science and Technology University, Beijing 100192, China
Corresponding author:Lin, M.(lin_muyi@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:61-65
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:It is the first step as well as an important basis in evaluating the safety of the running vehicles to know the dynamic property of the braking system in the study of the whole vehicle brake property. In this paper, the responding characteristics of the electro-hydraulic braking system are analyzed, by substituting the electro-hydraulic brake valve with the domestic proportional pressure-reducing valve. The dynamic simulation model of the electro-hydraulic braking system is established, and the influence rules of the main structure parameters of the proportional pressure-reducing valve and the system parameters are analyzed using Matlab/Simulink software. The experiment verifies the correctness of the simulation model, and analyzes the effects of different control signals on the brake pressure and provides the theoretical basis for the design and study of the electro-hydraulic braking system.
Number of references:14
Main heading:Computer simulation
Controlled terms:Brakes - Braking - Computer software - Dynamic analysis - Experiments - Friction materials - Hydraulic brakes - Hydraulic machinery - Pressure regulators - Simulators  - Vehicles
Uncontrolled terms:Brake pressure - Braking system - Construction vehicle - Control signal - Dynamic property - Dynamic simulation models - Electro-hydraulic control - Electro-hydraulics - Influence rule - Main structure  - Matlab/Simulink software - Pressure reducing valves - Simulation model - Theoretical basis - Vehicle brakes
Classification code:901.3 Engineering Research - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 671 Naval Architecture - 632.2 Hydraulic Equipment and Machinery - 621 Nuclear Reactors - 602 Mechanical Drives and Transmissions - 601.1 Mechanical Devices - 522 Gas Fuels - 432 Highway Transportation - 422.2 Strength of Building Materials : Test Methods
DOI:10.3969/j.issn.1002-6819.2011.11.012
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 5>

Accession number:20114714541925
Title:Optimizing parameters on vibration breakshovel of radish harvester
Authors:Fu, Wei (1); Chen, Haitao (2); Kan, Za (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China; (2) College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Fu, W.(fuwei001@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:46-50
Language: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 key parameters of the radish harvester vibration breakshovel, the scarification experiment was conducted by using the eccentric link vibration device. The two times orthogonal rotational regressive tests were designed in the experiment that harvester walking velocity, frequency, amplitude, inclination angle, in-soil angle of vibration breakshovel as input parameters and soil porosity as output parameters were defined and soil porosity were defined as output parameters. The regression mathematics models between output parameters and input parameters were established and then parameters were optimized through Design-Expert 6.0. The optimal combination that harvester walking velocity was 0.64 m/s, frequency of vibration breakshovel was 2 Hz, amplitude of vibration breakshovel was 14.38 mm, inclination angle of vibration breakshovel was 25.72&deg;, in-soil angle of vibration breakshovel was 39.68&deg; was determined, at that time the soil porosity was 50%-60%. The basis is provided for researching and designing the radish harvester.
Number of references:17
Main heading:Harvesters
Controlled terms:Experiments - Machinery - Optimization - Porosity - Soils
Uncontrolled terms:Agriculture machinery - Design-expert - Inclination angles - Input parameter - Key parameters - Mathematics model - Optimal combination - Optimizing parameters - Output parameters - Radish  - Soil Porosity - Vibration breakshovel - Vibration devices - Walking velocity
Classification code:483.1 Soils and Soil Mechanics - 601 Mechanical Design - 821.1 Agricultural Machinery and Equipment - 901.3 Engineering Research - 921.5 Optimization Techniques - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2011.11.009
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 6>

Accession number:20114714541947
Title:Verification and quantitative expression on southern corn leaf blight
Authors:Liu, Zhe (1); Guo, Jing (1); Li, Shaoming (1); Yang, Yang (1); Zhang, Xiaodong (1); Chen, Bin (1); Zhao, Zhuang (1); Yang, Jianyu (1); Zhu, Dehai (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Li, S.(lshaoming@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:160-163
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:Southern leaf blight is a major stress of maize, happening in most regions of China, especially in summer corn region. In this study, the Huang-Huai-Hai and Northeast and North China plain were chosen as the study area. Firstly, the meteorological factors resulting in Bipolaris maydis were selected through the correlation analysis between the sample meteorological data and maize regional trial data in the same county. Those were the number of the days (D<inf>T</inf>) with daily average temperature from 25 to 27&deg;C and the number of the days (D<inf>R</inf>) with daily rainfall between 1 and 25 mm during June, July and August. Secondly, a quantitative expression on southern corn leaf blight (Y), Y=0.05103D<inf>T</inf> 0.04333D<inf>R</inf>, was created by multivariable regression method. Using the equation, the stress of each meteorological station was calculated, and then, the stress of each county was estimated using geostatistics analysis tool of interpolation in ArcGIS. At last, the stress was compared by the equation with statistical findings and survey results, the results showed that the stress was more serious in the Huang-Huai-Hai plain, which coincides with the actual situation. In this study, the quantitative expression of southern corn leaf blight could provide simulation data of environment stresses at the county level, which could be a data source for precise extension of variety, test environment selection of field trial and environment evaluation.
Number of references:16
Main heading:Multivariant analysis
Controlled terms:Correlation methods - Meteorology - Surveys
Uncontrolled terms:Geo-statistics - Leaf blights - Maize - Plant disease - Quantitative expression
Classification code:405.3 Surveying - 443 Meteorology - 922 Statistical Methods - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2011.11.031
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 7>

Accession number:20114714542768
Title:Preservation quality of cold shock treated cucumber and heat transfer characteristic during treatment
Authors:Chen, Aiqiang (1); Yang, Zhao (1); Yin, Haijiao (1); Zhang, Na (1)
Author affiliation:(1) Thermal Energy Research Institute, Tianjin University, Tianjin 300072, China
Corresponding author:Yang, Z.(zhaoyang@tju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:349-353
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The effect of cold shock treatment on the preservation quality of cucumber and heat transfer mechanism during cold shock treatment was studied, a heat transfer model suitable for cucumber cold shock was established, and the preservation effect of cucumber treated with ice-water for 20, 40, 60 min respectively was comparatively studied. The results showed that storage quality of cucumber was related to both the minimum temperature arrived and the duration of treatment. Cold shock treatment for 40 min could inhibit the decline of firmness, soluble solids contents, slow down weight loss rate and increase the activity of peroxidase. The established heat transfer model can predict the heat transfer process of cucumber accurately. The model and related conclusions can provide theoretical and practical guidance for cold shock treatment of cucumber.
Number of references:17
Main heading:Water treatment
Controlled terms:Heat transfer - Mechanisms - Models
Uncontrolled terms:Cold shock - Cucumber - Heat transfer characteristics - Heat transfer mechanism - Heat transfer model - Heat transfer process - Practical guidance - Soluble solids content - Storage quality - Weight loss rates
Classification code:445.1 Water Treatment Techniques - 601.3 Mechanisms - 641.2 Heat Transfer - 902.1 Engineering Graphics
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 8>

Accession number:20114714541922
Title:Simulation analysis of working process and performance of inside-filling seed metering device by discrete element method
Authors:Li, Zhengquan (1); Yu, Jianqun (1); Zhang, Weilin (1); Fu, Hong (2)
Author affiliation:(1) School of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China; (2) College of Computer Science and Technology, Jilin University, Changchun 130012, China
Corresponding author:Fu, H.(fuhong@jlu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:32-36
Language: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, an inside-filling seed metering device and the wheat seed were researched by using the discrete element method. The two-dimensional discrete element method analytical model of a seed metering device was established based on its CAD model, and the two-dimensional particle model of a wheat seed was built using the method of combination of different circular arcs. The behaviors of wheat seeds and the performance of the seed metering device were simulated and analyzed using self-developed two-dimensional discrete element method software. By comparing the simulation results with the experimental results, good agreements were obtained. The results showed the feasibility of using discrete element method to analyze the performance of an inside-filling seed metering device, which can be a new method for the research and optimal design of inside-filling seed metering device.
Number of references:18
Main heading:Seed
Controlled terms:Agricultural machinery - Computer aided design - Computer simulation - Equipment - Filling - Finite difference method - Mathematical models - Optimization - Two dimensional
Uncontrolled terms:Analytical model - CAD models - Circular arc - Inside-filling seed metering device - Optimal design - Particle model - Seed metering devices - Simulation analysis - Wheat seeds - Working process
Classification code:691.2 Materials Handling Methods - 723.5 Computer Applications - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products - 901 Engineering Profession - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2011.11.006
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 9>

Accession number:20114714541982
Title:Effects of ultra-high pressure and gellan gum on gelling properties of surimi from silver carp Hypophthalmichthys molitrix
Authors:Lu, Jianfeng (1); Shao, Mingshuan (1); Lin, Lin (1); Ye, Yingwang (1); Chen, Conggui (1); Jiang, Shaotong (1)
Author affiliation:(1) College of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author:Lu, J.(lujf@sibs.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:372-377
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To improve the gelling properties of surimi, gellan gum was added to silver carp surimi, and then processed by ultra-high pressure (UHP). Surimi gel was formed after two-stage heating treatment. Its gel strength, whiteness and pH value were measured, respectively. The effects of pressure, time and gellan gum addition (mass percentage)on the gelling properties of silver carp surimi were studied. The results showed that there was no significant change in gel strength when pressure, time and gellan gum addition were more than 300 MPa, 10 min and 1.0%, respectively. The optimum conditions were as follows: 300 MPa pressure, 10 min time and 1.0% gellan gel addition. The effect order of UHP treatment conditions on gel strength was pressure &gt; time &gt; gellan gel addition. This study indicated that UHP treatment with gellan gel addition could modify the effect on the formation of silver carp surimi gel, and it also suggested that the two treatments exhibit a big potential for surimi processing.
Number of references:20
Main heading:Gels
Controlled terms:Fish - Gelation - High pressure effects - Processing - Silver
Uncontrolled terms:Gel strength - Gel strengths - Gellan gum - Gelling properties - Heating treatments - Mass percentage - Optimum conditions - pH value - Silver carp - Surimi  - Surimi processing - Treatment conditions - Two stage - Ultra-high - Ultrahigh pressure
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 913.4 Manufacturing - 822 Food Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 802.3 Chemical Operations - 547.1 Precious Metals - 471 Marine Science and Oceanography - 461 Bioengineering and Biology
DOI:10.3969/j.issn.1002-6819.2011.11.069
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 10>

Accession number:20114714541936
Title:Wear experiment analysis of diesel engine fueled with biodiesel
Authors:Li, Lilin (1); Wang, Zhong (1); Qin, Xianfeng (1); Wang, Lin (3); Cha, Hong (3)
Author affiliation:(1) School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China; (2) Department of Mechanical Engineering, Henan Institute of Engineering, Zhengzhou 450000, China; (3) Nanjing Iveco Motor Company Limited, Nanjing 210000, China
Corresponding author:Li, L.(liluogong@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:107-110
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The 1000 h reliability experiment was carried out on the common rail diesel engine using BD5 biodiesel. The wears of engine parts were investigated after experiment. By dismantling and examining the engine parts, processing traces or visible light of major friction journal could be observed, and there was a small amount of coke at the valve. The wears of the main moving parts were measured after the reliability experiment. The wears of piston, connecting rod, crank group and valve train were analyzed. The results showed that, the diesel engine could burn biodiesel for long time without problem, after 1000 h test, the wear of oil ring for cylinder 4 was 0.004 mm, the wear of small rod for cylinder 3 was 0.043 mm, the wear of crankshaft for cylinder 2 was 0.003 mm. The maximum subsidence of valve for cylinder 1 and cylinder 2 was 0.009 mm. During the experiment, the parts of diesel engine were not broken, peeled off, ablation or bonded. Burning biodiesel had no exceptionally influence to the diesel major parts.
Number of references:10
Main heading:Engine cylinders
Controlled terms:Abrasion - Biodiesel - Crankshafts - Diesel engines - Engines - Experiments - Reliability analysis
Uncontrolled terms:Common rail diesel engines - Engine parts - Experiment analysis - Moving parts - Valve train - Visible light
Classification code:523 Liquid Fuels - 601.2 Machine Components - 612 Engines - 901.3 Engineering Research - 913 Production Planning and Control; Manufacturing - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2011.11.020
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 11>

Accession number:20114714541934
Title:Mechanical and mathematical model analysis of uprooted force on cassava storage root
Authors:Yang, Wang (1); Cai, Ganwei (2); Yang, Jian (2); Huang, Yiqi (2)
Author affiliation:(1) College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; (2) College of Mechanical Engineering, Guangxi University, Nanning 530004, China
Corresponding author:Yang, J.(yangokok@gxu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:95-100
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 research on the effects of uprooted speed and distribution status of cassava storage root in soil on the uprooted force on cassava storage root, mechanical and mathematical model of uprooted force on cassava storage root considering the effect of uprooted speed were established by using the physical test method, explicit dynamic simulation software ANSYS/LS-DYNA and soil mechanics theory to have physics experiment and mechanical analysis, and then the models were verified. The results showed that the mechanical model of assumption uprooted force on cassava storage root as interaction of a disc and its extension on the soil was reasonable; mathematical model of maximum uprooted force on disc was highly precision, and the most fractional error between theoretical value and measured value was less than 16%; mathematical model of maximum uprooted force on cassava storage root has higher precision in uprooted force of cassava storage root, which distribution and growth both were like disc-shaped; mathematical model of uprooted force on cassava storage root has lower precision in uprooted force of cassava storage root, which distribution and growth both were uneven, but the most fractional error between the theoretical value and measured value also was less than 27%; with the increasing of uprooted speed, the diameter and depth of root disc, the maximum uprooted force on cassava storage root increased. The most influence factor on the maximum uprooted force on cassava storage root is depth of root disc, followed by diameter, and finally uprooted speed. The design foundation is provided for uprooted mechanism system of storage root in dig-uproot cassava harvester.
Number of references:15
Main heading:Mathematical models
Controlled terms:Agricultural machinery - Computer simulation - Dynamic mechanical analysis - Dynamics - Geologic models - Software testing - Soil mechanics - Soils - Speed
Uncontrolled terms:Cassava storage root - Explicit dynamics - Fractional errors - Lower precision - Mechanical analysis - Mechanical model - Storage roots - Test method - Theoretical values - Uprooted force
Classification code:931.1 Mechanics - 921 Mathematics - 821.1 Agricultural Machinery and Equipment - 723.5 Computer Applications - 483.1 Soils and Soil Mechanics - 481.1 Geology - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2011.11.018
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 12>

Accession number:20114714541970
Title:Theoretical research and case study of modern agriculture planning based on circular economy theory
Authors:Cui, Jun (1)
Author affiliation:(1) Chinese Academy of Agricultural Engineering, Beijing 100125, China
Corresponding author:Cui, J.(cuijun6688@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:283-288
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With the development of oil agriculture, the material wealth was rapidly increased, but the resources were excessively consumed and ecological environment was polluted. Along with the development of circular economy theory, agricultural circulation economy became an important form and ultimate goal of modern agricultural development. Based on discussion of theoretical source and content of circular economy, the experiences of agricultural circular economy in four typical states or regions were introduced, such as EU, US, Japan and Philippine farm. The enlightenment to China and the core of the modern agricultural planning theory were presented. Three thinking methods of modern agricultural planning on the guidance of circular economy theory were stated, which illustrated the core content of modern agricultural planning. Taking agricultural circular economy planning on Shuangcheng city in Heilongjiang province as a case study, the application and practice of modern agricultural planning theory was analyzed. The research can provide a reference for modern agricultural planning and development of agricultural circular economy.
Number of references:20
Main heading:Agriculture
Controlled terms:Modernization - Planning - Research
Uncontrolled terms:Agricultural development - Agricultural planning - Circular economy - Ecological environments - Economy analysis - Theoretical research
Classification code:403 Urban and Regional Planning and Development - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 901 Engineering Profession - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2011.11.054
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 13>

Accession number:20114714541927
Title:Radiation noise prediction of vehicular gearbox under oil-solid-gas coupling effect
Authors:Liu, Hui (1); Chen, Fuzhong (2); Xiang, Changle (1)
Author affiliation:(1) Technology on Vehicle Transmission Laboratory, Mechanical Engineering School, Beijing Institute of Technology, Beijing 100081, China; (2) School of Electromechanical Engineering, China University of Petroleum, Dongying 257061, China
Corresponding author:Chen, F.(Chenfz@upc.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:56-60
Language: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 fluid-structure coupling model including the gearbox housing, internal air and the lubrication oil was built by the finite element method to predict the radiation noise of gearbox more accurately and acquire the actual operating state of the gearbox. The finite element model of housing was verified through a modal test. Based on the acoustic boundary element theory, the radiation noise level of the gearbox was simulated under the excitations of the engine and the gear meshing forces. Furthermore, the simulation results were also validated by an acoustic test. The results can provide a beneficial support for the further study of gearbox noise control.
Number of references:17
Main heading:Finite element method
Controlled terms:Acoustic noise - Air - Air lubrication - Couplings - Housing - Modal analysis - Transmissions
Uncontrolled terms:Acoustic tests - Boundary elements - Coupling effect - Finite Element - Finite element models - Fluid-structure coupling - Gear meshing - Gearbox housings - Lubrication oil - Modal test  - Noise levels - Noise predictions - Operating state
Classification code:921 Mathematics - 804 Chemical Products Generally - 751.4 Acoustic Noise - 921.6 Numerical Methods - 607.2 Lubrication - 602 Mechanical Drives and Transmissions - 403.1 Urban Planning and Development - 602.2 Mechanical Transmissions
DOI:10.3969/j.issn.1002-6819.2011.11.011
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 14>

Accession number:20114714541965
Title:Bacterial inactivation effect of UV in aquaculture recirculating water
Authors:Zheng, Rongjin (1); Xiang, Kun (1); Zhu, Songming (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
Corresponding author:Zhu, S.(zhusm@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
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 a recirculating aquaculture system with single-lamp UV devices, experiments were carried out to investigate the effect of UV light on fecal coliform inactivation. The research results showed that UV intensity, recirculating flow rate and UV transmittance of water were three important factors for UV inactivation efficiency. It was found that the higher UV intensity, recirculating flow rate and UV transmittance of water made UV devices more effective. Based on the experimental data, a bacterial inactivation model of UV light for recirculating systems was presented and the first-order inactivation rate constant was found to be 0.0062 m²/J for UV inactivation of fecal coliform. Simulation results indicated that, for disinfecting microorganisms with a lower inactivation rate, increasing UV intensity was more effective than increasing daily cycle number. The obtained results could be used for design and operation of UV inactivation in recirculating aquaculture systems.
Number of references:26
Main heading:Aquaculture
Controlled terms:Bacteria - Coliform bacteria - Flow rate - Models - Rate constants - Ultraviolet devices - Ultraviolet radiation - Water
Uncontrolled terms:Bacterial inactivation - Cycle number - Design and operations - Experimental data - Fecal Coliform - First-order - Inactivation - Recirculating aquaculture system - Recirculating flow - Recirculating system  - Recirculating water system - Research results - UV inactivations - UV intensity
Classification code:821.3 Agricultural Methods - 801.4 Physical Chemistry - 741.3 Optical Devices and Systems - 902.1 Engineering Graphics - 741.1 Light/Optics - 461.9 Biology - 444 Water Resources - 631 Fluid Flow
DOI:10.3969/j.issn.1002-6819.2011.11.049
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 15>

Accession number:20114714541971
Title:Comprehensive evaluation index system and method on resource utilization technology of agricultural residues
Authors:Song, Chengjun (1); Zhang, Yuhua (1); Li, Bingfeng (1)
Author affiliation:(1) Institute of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, Beijing 100125, China
Corresponding author:Zhang, Y.(zhangyuhua@sina.vip.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:289-293
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Comprehensive evaluation on resource utilization technology of agricultural residues is the key issue to select and integrate the modern agricultural technology. In order to construct the comprehensive evaluation index system and method for resource utilization technology of agricultural residues in China, construction on comprehensive evaluation index system and method for resource utilization technology of agricultural residues was put forward and comprehensive evaluation index system was established with research method of literature analysis based on social economic-natural compound ecosystem. Comprehensive evaluation index system was made up of 4 grades and 37 indices. Based on the discussion of the implementation process of comprehensive evaluation of agricultural waste utilization, its evaluation model including 4 levels was proposed and the evaluation model had the characters of comprehension, combination of quantitative and qualitative. These results will provide the methodology reference for assessing, selecting, integrating and promoting resource utilization technology of agricultural residues in China.
Number of references:16
Main heading:Quality control
Controlled terms:Agricultural wastes - Computer systems - Indicators (instruments) - Technology - Waste utilization
Uncontrolled terms:4-level - Analytic hierarchy - Comprehensive evaluation - Comprehensive evaluation index system - Evaluation models - Implementation process - ITS evaluation - Literature analysis - research methods - Resource utilizations
Classification code:944.3 Pressure Measuring Instruments - 913.3 Quality Assurance and Control - 901 Engineering Profession - 821.5 Agricultural Wastes - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment - 452.3 Industrial Wastes
DOI:10.3969/j.issn.1002-6819.2011.11.055
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 16>

Accession number:20114714541976
Title:Comprehensive evaluation of regional land resources carrying capacity based on projection pursuit model optimized by particle swarm optimization
Authors:Jiang, Qiuxiang (1); Fu, Qiang (1); Wang, Zilong (1)
Author affiliation:(1) College of Water Conservancy and Architecture, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Fu, Q.(fuqiang@neau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:319-324
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to solve the problem of poor objectivity of index weight assignment for land resources carrying capacity evaluation, the projection pursuit evaluation model optimized by particle swarm optimization algorithm was proposed and applied to evaluate the land resources carrying capacity of Sanjiang plain in 2008. The results showed that the model was feasible for effectively avoiding human disturbance in index weight assignment and obtaining the evaluation results in agreement with facts. The evaluation results indicated that the comprehensive evaluation value of the land resources carrying capacity grade of the whole Sanjiang plain was 2.621 in 2008, and the land resources utilization had strong carrying capacity for social development and environment protection but had low guarantee degree for economic and technical development. The land resources carrying capacity of the cities and counties showed significant differences in Sanjiang plain. Thus scientific programs for land use and socioeconomic development ought to be made according to the regional resources characteristics.
Number of references:19
Main heading:Landforms
Controlled terms:Algorithms - Economic and social effects - Economics - Land use - Models - Natural resources - Particle swarm optimization (PSO) - Regional planning
Uncontrolled terms:Comprehensive evaluation - Environment protection - Evaluation models - Evaluation results - Human disturbances - Index weight - Land resources - Particle swarm - Particle swarm optimization algorithm - Projection pursuits  - Regional resources - Sanjiang plain - Scientific programs - Social development - Socio-economic development - Technical development
Classification code:921 Mathematics - 902.1 Engineering Graphics - 723 Computer Software, Data Handling and Applications - 512 Petroleum and Related Deposits - 971 Social Sciences - 501 Exploration and Prospecting - 444 Water Resources - 403.2 Regional Planning and Development - 403 Urban and Regional Planning and Development - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2011.11.060
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 17>

Accession number:20114714541968
Title:Steam gasification kinetics of biomass char
Authors:Xu, Guiying (1); Sun, Guogang (1); Cheng, Hui (1); Wang, Yang (1)
Author affiliation:(1) Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
Corresponding author:Sun, G.(ggsunbj@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:273-277
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Biomass gasification includes biomass pyrolysis and steam gasification of biomass chars subsequently. In order to provide basic data for the design of biomass gasification reactor, thermal balance was used to finish steam gasification of biomass char, which was produced at 1273 K. Effects of the gasification temperature on the gasification reactivity, the average gasification rate, and the reaction rate were investigated. And the homogeneous model and shrinking core model were employed to obtain the corresponding kinetic parameters. With the increasing temperature, biomass steam gasification reactivity and the average rate increased. The activity energy was 181.24 kJ/mol, the pre-exponential factor was 5.19&times;10⁵ min^-1 with homogeneous model. The activity energy was 192.87 kJ/mol, pre-exponential factor was 1.60&times;10⁶ min^-1 with shrinking core model. Both shrinking core model and homogeneous model can describe the process of biomass char steam gasification well, however, shrinking core model fit the experimental data better than homogeneous model.
Number of references:15
Main heading:Gasification
Controlled terms:Biomass - Enzyme kinetics - Kinetics - Pyrolysis - Reaction rates - Shrinkage - Steam
Uncontrolled terms:Activity energy - Average rate - Biomass char - Biomass Gasification - Biomass pyrolysis - Experimental data - Gasification reactivity - Gasification temperatures - Homogeneous models - Preexponential factor  - Shrinking core model - Steam gasification - Thermal balance
Classification code:525.1 Energy Resources and Renewable Energy Issues - 614 Steam Power Plants - 802.2 Chemical Reactions - 802.3 Chemical Operations - 931 Classical Physics; Quantum Theory; Relativity - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2011.12.052
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 18>

Accession number:20114714541966
Title:Influence factors of evaporation time of pesticide droplets on different tobacco leaves
Authors:Yu, Yang (1); Chen, Xiuhong (1); Zhang, Tianshun (1); Wang, Hui (1); Shi, Ling (1); Zuo, Wen (1)
Author affiliation:(1) College of Engineering and Technology, Yunnan Agricultural University, Kunming 650201, China
Corresponding author:Yu, Y.(yuyang136@yeah.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:263-267
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:One of the ways to obtain the high efficiency of pesticide spray applications is to study the evaporation time on different crop leaves. Three tobacco varieties (NC471, Yun110, and T66) were taken as experiment subjects. surfactants (Nongru 500#, Fairland2408, and Tech-408) were added into pesticide which were 10% Imidacloprid, 70% Mancozeb and 40% Dimetachlone water separately. Droplet evaporation whole process and the data of evaporation time were measured by sequential images after the droplet was deposited. The results showed that there was no significant connection between the pesticide types and the droplet evaporation time on tobacco leaves. No matter surfactants were added or not, evaporation time on T66 tobacco leaves was significantly shorter than that on NC471 and Yun 110. The surface characteristics of the 3 tobacco leaves were investigated and the results showed that T66 leaves had less stomata and more fine fur obvious difference with other two tobacco leaves. Therefore, the tobacco leaves with less stomata and more fine fur could shorten the droplet evaporation time. The tobacco variety and the surface fine structure acted as critical factors that influenced the droplet evaporation time. The experiment also showed that evaporation time of pesticide droplets would be shortened after the surfactants were added. The droplet evaporation time was shortened 64-78 s when Fairland2408 was added. The droplet evaporation time was shortened 61-74 s and 12-26 s when Tech-408 and Nongru 500# was added, respectively. The higher the surfactant concentration went, the shorter evaporation time of insecticide droplets would be. The results above-mentioned will provide scientific basis for how to control the absorbing speeds of leaves and obtain the high efficiency of pesticide spray applications on different tobacco leaves.
Number of references:11
Main heading:Evaporation
Controlled terms:Deposits - Drops - Efficiency - Experiments - Insecticides - Pesticides - Phase transitions - Surface active agents - Surface structure - Tobacco
Uncontrolled terms:Absorbing speeds of leaves - Critical factors - Crop leaves - Droplet evaporation - Evaporation time - Fine structures - Imidacloprids - Mancozeb - Pesticide droplets - Pesticide spray  - Sequential images - Surface characteristics - Surfactant - Surfactant concentrations - Tobacco leave - Whole process
Classification code:951 Materials Science - 913.1 Production Engineering - 901.3 Engineering Research - 821.4 Agricultural Products - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 801.4 Physical Chemistry - 617 Turbines and Steam Turbines - 612 Engines - 532 Metallurgical Furnaces - 443.1 Atmospheric Properties
DOI:10.3969/j.issn.1002-6819.2011.11.050
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 19>

Accession number:20114714541939
Title:Energy-saving technology for pond mechanical aeration based on oxygen mass transfer
Authors:Gu, Jian (1); Men, Tao (2); Liu, Xingguo (1); Ding, Jianle (1); Gu, Chuanchuan (1)
Author affiliation:(1) Key Laboratory of Fishery Equipment and Engineering, Ministry of Agriculture, Shanghai 200092, China; (2) Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, China; (3) National Supervision and Testing Center of Fishery Machinery and Instrument, Shanghai 200092, China
Corresponding author:Gu, J.(gujian@fmiri.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:120-125
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:An energy saving method for pond mechanical aeration was proposed based on oxygen mass transfer theory through experiments and analyses of different pond mechanical aeration patterns. With the method, an average 4% energy-saving was achieved for the existing pond mechanical aeration equipments by changing the operation control status and method. Furthermore, combined with use of water layer exchange machine for substitution of aerator at some time, it can save 29.2% of total energy consumption, compared with traditional operation mode of aerator. The results can provide a reference for application of pond mechanical aeration and development of intelligentized aeration research.
Number of references:36
Main heading:Lakes
Controlled terms:Aquaculture - Energy conservation - Energy utilization - Experiments - Mass transfer - Oxygen
Uncontrolled terms:Energy saving methods - Energy-saving technologies - Experiment analysis - Operation control - Operation mode - Oxygen mass transfer - Pond - Total energy consumption - Water layers
Classification code:901.3 Engineering Research - 821.3 Agricultural Methods - 804 Chemical Products Generally - 641.3 Mass Transfer - 525.3 Energy Utilization - 525.2 Energy Conservation - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2011.11.023
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 20>

Accession number:20114714541967
Title:Effects of ethanol-phosphoric acid pretreatment on enzymatic saccharification of rice straw
Authors:Chen, Wei (1); Xu, Longjun (1); Chen, Kun (1)
Author affiliation:(1) State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; (2) Chongqing Communications Research and Design Institute of China Merchants, Chongqing 400067, China
Corresponding author:Xu, L.(xulj@cqu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:268-272
Language: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 enzymatic saccharification ratio of straw when producing biomass ethanol, rice straw was pretreated with ethanol-phosphoric acid solution at the normal temperature and pressure. The effects of temperature, ethanol volume fraction, time and the recycled ethanol-phosphoric acid solution on enzymatic saccharification ratio of rice straw were investigated. The results showed that the enzymatic saccharification ratio of rice straw increased from 10.03% to 57.75% when the volume fraction of ethanol was 50% (v/v), the pretreated temperature was50&deg;C and the pretreated time was 60 min. The enzymatic saccharification ratio of straw pretreated with the recycled ethanol-phosphoric acid solution was reached 56.89%, and close to saccharification ratio of straw pretreated with ethanol-phosphoric acid. The pretreatment with the recycled ethanol-phosphoric acid solution was able to reduce energy consumption and save operating cost with reducing the number of recycling ethanol by distillation. The physical structure and chemical properties of rice straw were changed after pretreated. The crystalline structure of rice straw was destroyed during the process of pretreatment, and its specific surface area and porosity increased. The pretreated straw was easily hydrolyzed by hydrolytic enzymes or microbe. Ethanol, lignin, phosphoric acid and other useful materials in filtrate solution were easily separated by distillation and centrifugation. The research could provide a circulatory pretreatment way of straw under mildness conditions was obtained.
Number of references:17
Main heading:Phosphoric acid
Controlled terms:Centrifugation - Chemical properties - Distillation - Energy utilization - Ethanol - Filtration - Recycling - Saccharification - Temperature
Uncontrolled terms:Acid pretreatment - Acid solutions - Biomass ethanol - Crystalline structure - Effects of temperature - Enzymatic saccharification - Hydrolytic enzyme - Normal temperature and pressures - Physical structures - Pre-Treatment  - Rice straws
Classification code:802.3 Chemical Operations - 802.2 Chemical Reactions - 801.2 Biochemistry - 801 Chemistry - 804.2 Inorganic Compounds - 641.1 Thermodynamics - 523 Liquid Fuels - 452.3 Industrial Wastes - 423 Non Mechanical Properties and Tests of Building Materials - 525.3 Energy Utilization
DOI:10.3969/j.issn.1002-6819.2011.11.051
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 21>

Accession number:20114714541981
Title:Effects of spray-drying technology on solubility of Fe enrichment egg powder
Authors:Liu, Jingbo (1); Ma, Shuang (1); Liu, Boqun (1); Yang, Jun (1); Zhang, Yan (1); Gong, Xintong (1)
Author affiliation:(1) Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, China
Corresponding author:Liu, J.(ljb168@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:365-371
Language: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 solubility of compound egg powder, egg powder with high Fe content was prepared by spray-drying technology, using egg as a raw material and ferrous sulfate as nutrition additive of Fe. The effects of the flow rate of spray, introduction temperature and inlet air temperature on the solubility of Fe enrichment egg powder were investigated by second general combination of rotating design method, and the regression model between the solubility of Fe enrichment egg powder and each factor was obtained. The results showed that: the flow rate of spray and inlet air temperature had significant influence on the solubility of Fe enrichment egg powder (p&lt;0.05). The sequence of influence from significant to common was the flow rate of spray, inlet air temperature and introduction temperature. The optimum parameters were the flow rate of spray 22 mL/min, introduction temperature 39.82&deg;C, inlet air temperature 178.21&deg;C. With the optimum condition, the solubility exponent of production was 1.87, water holding capacity 5.63 mL/g, agglomeration 24.58 g/100 g and comprehend score was 110.18. Comparing the nutritional compositions of fresh egg, the content of Fe in Fe enrichment egg powder was 77.67%. Thus it can be concluded that it is possible to improve the solubility of Fe enrichment egg powder with the technology of spray drying.
Number of references:14
Main heading:Solubility
Controlled terms:Atmospheric temperature - Flow rate - Inlet flow - Iron - Optimization - Regression analysis - Spray drying - Thermal load - Thermal processing (foods)
Uncontrolled terms:Content of Fe - Design method - Fe content - Ferrous sulfate - Fortification - Inlet air temperatures - Nutritional compositions - Optimum conditions - Optimum parameters - Regression model  - Water holding capacity
Classification code:922.2 Mathematical Statistics - 921.5 Optimization Techniques - 822.2 Food Processing Operations - 801.4 Physical Chemistry - 643.1 Space Heating - 631.1 Fluid Flow, General - 631 Fluid Flow - 545.1 Iron - 443.1 Atmospheric Properties
DOI:10.3969/j.issn.1002-6819.2011.11.068
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 22>

Accession number:20114714541949
Title:Effect of aging factor on mechanical properties of GCL as canal lining material
Authors:Yu, Jian (1); Zhou, Chunsheng (2); Shi, Haibin (2); Zhang, Peiqi (1); Zhao, Peiqing (1); Shi, Jigang (1)
Author affiliation:(1) Water Resources Research Institute of Inner Mongolia, Huhhot 010010, China; (2) College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Huhhot 010018, China; (3) Resource and Environmental Economics of Inner Mongolia Institute of Finance, Huhhot 010051, China
Corresponding author:Yu, J.(Jianyu192005@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:170-175
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:Geosynthentic clay liners (GCL) have great application value in canal lining projects. In order to estimate the effects of aging factors on the mechanical properties of GCL as canal lining materials, a series of laboratory simulation and field experiments in Inner Mongolian Hetao irrigation district were conducted to test effects of the five aging factors on the mechanical indexes of three kinds of GCL. The results indicated that temperature, humidity and ultraviolet radiation had some effects on the mechanical properties of GCL. The effects of high temperature on mechanical properties of GCL were more significant than those of low temperature, and the effects of high-low temperature cycling were weaker than effects of high or low temperature separately. Three kinds of mechanical properties of GCL samples was decreased by 34.27%, 35.77%, 45.02% after high temperature (60&deg;C) aging 72 h and 19.51%, 31.49%, 18.40% after low temperature(-40&deg;C) aging 72 h, 19.32%, 32.62% and 38.28% after high-low temperature cycling(-40&deg;C for 12h and 60&deg;C for 12 h) 10 times and 29.08%, 18.31% and 36.17% after Ultraviolet radiation 1200 h, respectively. The mechanical properties of 2 # and 3 # decreased by 12.41%, 13.08%, but 1# has no change with GCL moisture content from 50% to 100% after high temperature (60&deg;C) aging 24 h. GCL in field aged faster in the first year, and the mechanical properties of the three samples decreased by 12.1%, 18.5% and 17.8% respectively while mechanical properties varied mitigatively after one year. This research can provide references for the application of GCL as canal lining materials.
Number of references:21
Main heading:Mechanical properties
Controlled terms:Canal linings - Hydraulic structures - Radiation effects - Stress measurement - Stresses - Ultraviolet radiation
Uncontrolled terms:After high temperature - Aging factors - Clay liners - Field experiment - First year - Geosynthentic clay liners - High temperature - High-low - In-field - Irrigation districts  - Laboratory simulation - Lining materials - Low temperatures - Mechanical indexes - Temperature cycling
Classification code:744 Lasers - 741.1 Light/Optics - 711 Electromagnetic Waves - 611 Hydroelectric and Tidal Power Plants - 951 Materials Science - 441 Dams and Reservoirs; Hydro Development - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 405 Construction Equipment and Methods; Surveying - 434 Waterway Transportation
DOI:10.3969/j.issn.1002-6819.2011.11.033
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 23>

Accession number:20114714541943
Title:Wheat stem moisture sensor using short probes based on SWR principle
Authors:Liu, He (1); Zhao, Yandong (1)
Author affiliation:(1) School of Technology, Beijing Forestry University, Beijing 100083, China
Corresponding author:Zhao, Y.(yandongzh@bjfu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:140-144
Language: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 wheat stem moisture sensor was designed by standing wave ratio theory. The sensor probe has tow paralleled needles with 8 mm interval, which are 21 mm in length and 0.7 mm in diameter. Optimal length of the transmission line was 39 cm according to the experimental data. By comparing sensor output voltage and moisture content measured by oven drying method, we finally obtained the calibration equation for our wheat stem water content sensor. The sensor showed good stability, linearity and sensitivity, with a maximum deviation less than 3%, an average deviation of 1.126% and a standard deviation of 1.299%.
Number of references:17
Main heading:Moisture control
Controlled terms:Elastic waves - Measurements - Moisture determination - Moisture meters - Probes - Sensors - Water content - Waves
Uncontrolled terms:Average deviation - Calibration equations - Experimental data - Good stability - Moisture contents - Moisture sensors - Oven drying method - Sensor output - Sensor probes - Short probe  - Standard deviation - Standing wave - Standing-wave ratio - Transmission line - Wheat stems
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 801 Chemistry - 711 Electromagnetic Waves - 444 Water Resources - 751.1 Acoustic Waves
DOI:10.3969/j.issn.1002-6819.2011.11.027
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 24>

Accession number:20114714541969
Title:Effect of pretreatment methods on biogas production from anaerobic digested King grass
Authors:Li, Lianhua (1); Sun, Yongming (1); Ding, Cuihua (2); Kong, Xiaoying (1); Yang, Fuyu (2); Li, Dong (1); Yuan, Zhenhong (1); Zeng, Feng (1)
Author affiliation:(1) Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Acad. of Sci., Guangzhou 510640, China; (2) Grassland Institute, China Agricultural University, Beijing 100094, China
Corresponding author:Sun, Y.(sunym@ms.giec.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:278-282
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve biodegradability of perennial grass, batch mesophilic anaerobic digestion to produce biogas were conducted using material of King grass from southern China. Modified Gompertz equation was used to fit the cumulative biogas production. The results showed that the crystallinity of raw materials decreased, which decreased from 4.73 to 3.29 when the pretreatment by steam heating. Biogas yield was significantly increased after steam heating pretreatment, and the biogas production rate of 581.05 mL/g VS was achieved, about 63% higher than that of the untreated material. Lag phase were 1.7, 1.8 and 0.5 d after preteratment, the lag phase was significantly reduced compared to raw materials without pretreatment (5.9 d). The pretreatment methods can significantly improve the anaerobic digestion performance of perennial King grass.
Number of references:20
Main heading:Anaerobic digestion
Controlled terms:Biodegradation - Biogas - Experiments - Fermentation - Heating
Uncontrolled terms:Biogas production - Crystallinities - Fit curve - King grass - Lag phase - Mesophilic anaerobic digestion - Perennial grass - Pre-Treatment - Pretreatment methods - Southern China
Classification code:452.4 Industrial Wastes Treatment and Disposal - 522 Gas Fuels - 643.1 Space Heating - 801.2 Biochemistry - 802.2 Chemical Reactions - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2011.11.053
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 25>

Accession number:20114714541960
Title:Improvement of indoor thermal environment of rural residences with coupled heating of attached sunspace and energy saving hot-wall
Authors:Chen, Mingdong (1); Shi, Yuliang (2)
Author affiliation:(1) College of Architecture Engineering, Qingdao Agricultural University, Qingdao 266109, China; (2) College of Horticulture, Qingdao Agricultural University, Qingdao 266109, China
Corresponding author:Shi, Y.(shiyuliang1981@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:232-235
Language: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 attached sunspace and saving hot-wall was built in rural residences of Qingdao, which aims to improve the indoor thermal environment in winter. The variation regularity of indoor temperature with outdoor weather conditions was studied according to monitoring the data of experimental house, which was a coupled heating of attached sunspace and saving hot-wall combination and the contrast house with same structure, such as room temperature and outdoor temperature, etc. The results showed that the average air temperature in coupled heating house was higher than that in the contrast house by 10.1&deg;C, and the maximum temperature difference reached 13.2&deg;C, the lowest temperature difference was only 5.4&deg;C. Through analysis of energy saving fraction, it was found that energy saving fraction of coupled heating house was high. It was feasible and economic to transform the attached sunspace and saving hot-wall in this area.
Number of references:15
Main heading:Walls (structural partitions)
Controlled terms:Atmospheric temperature - Couplings - Energy efficiency - Heating - Houses - Solar buildings - Space heating
Uncontrolled terms:Attached sunspace - Average air temperature - Indoor temperature - Maximum temperature - Outdoor temperature - Outdoor weather conditions - Qingdao - Room temperature - Saving hot-wall - Temperature differences  - Thermal environment - Variation regularity
Classification code:402 Buildings and Towers - 402.3 Residences - 443.1 Atmospheric Properties - 525.2 Energy Conservation - 602 Mechanical Drives and Transmissions - 643.1 Space Heating
DOI:10.3969/j.issn.1002-6819.2011.11.044
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 26>

Accession number:20114714541917
Title:Differential characteristics of cultivated land grade and its effect on cultivated land protection in China
Authors:Wang, Hongbo (1); Cheng, Feng (1); Zhang, Zhongfan (1); Yun, Wenju (1)
Author affiliation:(1) Land Consolidation and Rehabilitation Center, Ministry of Land and Resources, Beijing 100035, China; (2) Key Laboratory of Land Reconstruction, Ministry of Land and Resources, Beijing 100035, China
Corresponding author:Yun, W.(yunwenju@vip.sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:1-8
Language: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 profoundly understand the cultivated land quality, efficiently protect and improve cultivated land quality, the differential characteristic of cultivated land grade between provincial regions were found out by contrast analysis method based on the results of cultivated land gradation in China and the 1:50000 national agricultural land gradation database. The results showed that the basic differential characteristic of cultivated land in China was summed up as "less area of excellent grade, more area of low grade, and complex differential characteristics between and in provincial regions". The total cultivated land of 31provinces in China was calculated as 68390.2 khm² by using the Standard Area defined as Guangdong Province's average grade(5.4 grade), or 45750.7 khm² by using the Standard Area defined as 1 grade. According to the primary farmland protection area of 31 provinces in 2020 in national land use planning, primary farmland protection ratio by law and cultivated land grade in provinces must be plan as a whole. Based on the results, it is suggested that both quality and quantity should be paid attention, and taking grade advance and land capability construction as core role, constituting cultivated land grade and land capability dynamic inspection and report system are all necessary in land rehabilitation programming system, primary farmland regulating, high criterion primary farmland construction and permanence primary farmland protection.
Number of references:48
Main heading:Land use
Controlled terms:Classification (of information) - Concrete beams and girders - Farms - Production - Quality control - Standards
Uncontrolled terms:Agricultural land - Analysis method - Cultivated lands - Differential characteristic - Dynamic inspection - Guangdong Province - Land capability - Land evaluation - Land rehabilitation - Land Use Planning  - Low grade - Primary farmland - Programming system - Protection ratios
Classification code:403 Urban and Regional Planning and Development - 412 Concrete - 716.1 Information Theory and Signal Processing - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 902.2 Codes and Standards - 913 Production Planning and Control; Manufacturing
DOI:10.3969/j.issn.1002-6819.2011.11.001
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 27>

Accession number:20114714541941
Title:Experiment on variable rate spray with real-time mixing pesticide of 3WY-A3 sprayer
Authors:Zhang, Wenzhao (1); Liu, Zhizhuang (1)
Author affiliation:(1) Electronics Research Institute, Hunan University of Science and Engineering, Yongzhou 425100, China; (2) Key Laboratory of Key Technology on Agricultural Machine and Equipment, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Liu, Z.(liuzz168@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:130-133
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:It is of great significance to proceed variable rate spray (VRS) according to the requirement of crops for saving pesticide and protecting environment. A hand-push sprayer of type 3WY-A3 was tested with the VRS system on real-time mixing pesticide. The VRS system includes a mixing pesticide device, a differential pressure (DP) flow meter, a flow control valve and control hardware and software. The experimental results showed that the pesticide flow range was from 0.1 to 0.9 mL/s with control accuracy of &plusmn;5%.
Number of references:16
Main heading:Pesticides
Controlled terms:Control - Flow control - Flow measurement - Flowmeters - Mixing - Real variables - Spraying
Uncontrolled terms:Control accuracy - Control hardwares - Differential pressures - Electronic controls - Flow control valves - Flow ranges - Variable rate
Classification code:943.2 Mechanical Variables Measurements - 943.1 Mechanical Instruments - 921 Mathematics - 813.1 Coating Techniques - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 732 Control Devices - 731.3 Specific Variables Control - 731 Automatic Control Principles and Applications
DOI:10.3969/j.issn.1002-6819.2011.11.025
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 28>

Accession number:20114714541923
Title:Design of high trafficability four wheel self-propelled field machine for tobacco
Authors:Zhang, Chuanbin (1); Yu, Yongchang (2); Wu, Yaping (1)
Author affiliation:(1) Xuchang Vocational Technical College, Xuchang 461000, China; (2) College of Mechanical and Electrical, Henan Agricultural University, Zhengzhou 450002, China
Corresponding author:Yu, Y.(yych@henau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:37-41
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In accordance with the need of high trafficability field machinery of field management for tobacco in the mid and late stage, a four-wheel self-propelled high trafficability field machine was designed, which included an arch chassis with engine and transmission arranged on one side. Its maximum trafficable height is 1700 mm, with the speed range from 1.0 to 18 km/h. Combined with different tools, the machine can be used for various kinds of field works, such as protecting plants, cultivating lands, ridging, transplantation, mulching film, cultivation and banking, topping, picking tobacco, uprooting the cigar pipe. Field test with the prototype proved that it had the characteristics of little working intensity, high trafficability, low losses of tobacco, and high working efficiency.
Number of references:15
Main heading:Tobacco
Controlled terms:Engines - Machine design - Machinery - Wheels
Uncontrolled terms:Field machinery - Field machines - Field management - Field test - Field works - Four wheel self-propelled - Late stage - Low loss - Speed range - Trafficability  - Working efficiency
Classification code:601 Mechanical Design - 601.2 Machine Components - 612 Engines - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2011.11.007
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 29>

Accession number:20114714541985
Title:Identification of freshwater fish species based on computer vision
Authors:Zhang, Zhiqiang (1); Niu, Zhiyou (1); Zhao, Siming (2)
Author affiliation:(1) College of Engineering, Huazhong Agriculture University, Wuhan 430070, China; (2) College of Food Science and Technology, Huazhong Agriculture University, Wuhan 430070, China
Corresponding author:Zhang, Z.(412620075@qq.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:388-392
Language: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 facilitate the subsequent processing, it is necessary to develop an identification system which was used to classify the freshwater fish automatically by their species. In this study, four species of fish amounted 240 for the test samples were collected, which were chub, crucian, bream and carp, the image of each fish by the machine vision were got, after the image processing, the color components and the ratio between the major axis and the minor axis of the fish were extracted. Finally the identification model was extracted by the eigenvalues. The results showed that the identification model would be used to identify the four species; the precision rate was 96.67%. Computer vision can be used to grade the freshwater fish quickly and precisely, it has great practical application value.
Number of references:15
Main heading:Computer vision
Controlled terms:Eigenvalues and eigenfunctions - Fish - Image processing - Machine components - Vision
Uncontrolled terms:Color component - Eigenvalues - Freshwater fishes - Identification model - Machine - Major axis - Minor axis - Precision rates - Test samples - Variety identification
Classification code:921.1 Algebra - 822 Food Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 741.2 Vision - 741 Light, Optics and Optical Devices - 601.2 Machine Components - 471 Marine Science and Oceanography - 461.4 Ergonomics and Human Factors Engineering - 461 Bioengineering and Biology
DOI:10.3969/j.issn.1002-6819.2011.11.072
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 30>

Accession number:20114714541972
Title:Environmental effect of turf-soil system disposing nitrogen in biogas fertilizers
Authors:Zheng, Miaozhuang (1); Hu, Lin (1); Dong, Renjie (2); Wu, Daoming (1); Cheng, Shanping (1); Cui, Jianyu (1)
Author affiliation:(1) Key Laboratory of Plant-Soil Interactions, Ministry of Education, College of Resource and Environment, China Agricultural University, Beijing 100193, China; (2) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Cui, J.(hulin@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:294-299
Language: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 on the effect of biogas fertilizer application on nitrogen of groundwater in turf-soil system, under the climate condition of Beijing, contrast test was made with a soil column test device of subsurface infiltration system. Below 1 m soil depth, the concentration of NH<inf>4</inf>-N, NO<inf>3</inf>^--N and total nitrogen in the turf-soil leachate were measured under the five conditions and effect of different biogas application on them was analyzed. The five conditions were that the annual application rate of nitrogen was 20, 60, 100, 140 g/(m²&middota) in each biogas fertilizers and it was 20 g/m² in the chemical fertilizer with above device. The results showed that the concentration of NH<inf>4</inf>-N, NO<inf>3</inf>^--N, total nitrogen in the soil leachate increased with rising of nitrogen dosage in biogas fertilizers. When nitrogen application was 20 g/m² annually, the concentration of NH<inf>4</inf>-N, NO<inf>3</inf>^--N and total nitrogen in the soil leachate which was applied with chemical fertilizer was higher than that which was applied with biogas fertilizer. Ammonia nitrogen removal rates of all treatments were higher than 99.8% and total nitrogen removal rates of all treatments were 86.7%-95.6%. While nitrogen application of biogas fertilizer was 60 g/(m²&middota), the highest total nitrogen removal rate was 95.6%. Based on the quality standard for groundwater (GB/T 14848-93), the NO<inf>3</inf>^--N concentrations in soil leachate which nitrogen application of biogas fertilizer were 20 and 60 g/(m²&middota) came up to water quality standards of category III. When nitrogen application of biogas fertilizer were 100 and 140 g/(m²&middota), NO<inf>3</inf>^--N concentrations in soil leachate of 10% and 32.5% samples exceeded the water quality-standards of category III and it mainly occurred in June and August. The conclusion that 600 kg/(hm²&middota) nitrogen application of biogas fertilizer don't cause NO<inf>3</inf>^--N pollution to groundwater based on evaluation criterion that mass concentration of NO<inf>3</inf>^--N is 20 mg/L( water quality standards of category III) in leachate is arrived at.
Number of references:26
Main heading:Nitrogen fertilizers
Controlled terms:Agricultural chemicals - Biogas - Concentration (process) - Environmental impact - Fertilizers - Groundwater - Groundwater pollution - Leaching - Manures - Nitrogen  - Nitrogen removal - Percolation (solid state) - Quality control - Soils - Solvents - Standards - Water quality
Uncontrolled terms:Ammonia nitrogen removal - Application rates - Chemical fertilizers - Climate condition - Evaluation criteria - Fertilizer applications - Leachates - Mass concentration - Quality standard - Soil column  - Soil depth - Soil leachate - Total nitrogen - Total nitrogen removal - Turf-grass - Water quality standard
Classification code:913.3 Quality Assurance and Control - 902.2 Codes and Standards - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 933 Solid State Physics - 522 Gas Fuels - 454.2 Environmental Impact and Protection - 453.2 Water Pollution Control - 452.3 Industrial Wastes - 444.2 Groundwater - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2011.11.056
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 31>

Accession number:20114714541930
Title:Flow field characteristics of soft abrasive flow in multiform restraint flow passages
Authors:Ji, Shiming (1); Chi, Yongwei (1); Tan, Dapeng (1); Tang, Bo (1); Li, Chen (1); Fu, Youzhi (1)
Author affiliation:(1) Key Lab. of Special Purpose Equipment and Advanced Manufacturing Technol., Zhejiang University of Technology, Hangzhou 310014, China
Corresponding author:Tan, D.(tandapeng@zjut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:71-77
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to solve the problem of material removal in some specific regions of workpiece in softness abrasive flow machining, a method based on designing different restraint component structure to control flow field in constrained flow passage was proposed. A dynamic model of solid-liquid two-phase abrasive flow oriented to SAFM was established for physical parameters analysis by using standard k-&Epsilon; model and Mixture model. Taking undulation and rectangle flow passages to be specific subject to emulate, some processing parameters were investigated, such as velocity and pressure. The results show that the value of turbulence kinetic energy in complex flow passage is larger than simple flow passage, so complex restraint components drive turbulence more random. Compared with rectangle flow passage, static pressure and dynamic pressure in the workpiece surface of undulation flow passage get increased and form differential pressure obviously according to the shape of restraint component. Processing parameters such as pressure, velocity, abrasive, incident angle, etc. can be changed by different restraint component and different cross-sectional area in flow passage, and small eddy can be produced to enhance machining precision. The processing parameters can be selected on the basis of numerical simulation results which were partly proved by experiment.
Number of references:16
Main heading:Computer simulation
Controlled terms:Abrasives - Boundary layers - Dynamic models - Flow fields - Models - Numerical methods - Turbulence models
Uncontrolled terms:Abrasive flow machining - Complex flow - Component structure - Constrained flow - Control flow field - Cross sectional area - Differential pressures - Dynamic pressures - Flow field characteristics - Flow passage  - Incident angles - Machining precision - Material removal - Mixture model - Physical parameters - Processing parameters - Restraint component - Softness abrasive flow - Solid-liquid - Static pressure  - Turbulence kinetic energy - Work pieces
Classification code:606.1 Abrasive Materials - 631.1 Fluid Flow, General - 723.5 Computer Applications - 902.1 Engineering Graphics - 921 Mathematics - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2011.11.014
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 32>

Accession number:20114714541974
Title:Evaluation method of regional sustainable development based on land use information
Authors:Liu, Hai (1); Chen, Xiaoling (1); Huang, Rong (1); Lu, Jianzhong (1); Cai, Xiaobin (4); Li, Hui (5); Wu, Junfeng (1); Song, Zhen (1); Yu, Zhifeng (1)
Author affiliation:(1) State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China; (2) Faculty of Resources and Environmental, Hubei University, Wuhan 430062, China; (3) Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China; (4) Institute of Geodesy and Geophysics, Chinese Acad. of Sci., Wuhan 430077, China; (5) Faculty of Earth Sciences, China University of Geoscience, Wuhan 430074, China
Corresponding author:Chen, X.(cxl@lmars.whu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:306-312
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Considering the advantages of the ecological footprint emphasizing the effect of human activities and ecosystem service value emphasizing the influence of natural resources, the method of assessment of regional sustainable development was proposed based on land use information. Taking Jiangxi province as a case, land use dynamic change information was acquired by interpreting remote sensing images in three years of 1990, 2000 and 2008. The ecological footprint and the value of ecosystem services in the three periods were calculated on the land use data. Regional sustainable development assessment index were selected based on land use information, and the sustainable development was evaluated in the three periods. Results showed that although the capacity of provide ecological services was in good condition in the study period, disturbances human activities had caused the region unsustainable development. Sustainable development assessment index displayed the negative trend of sustainable development. The reason was that the increasing rate of the value of ecosystem services was slower than that of the ecological deficit. The sustainable development was mostly impacted by human activities. This research could provide the theoretical and reference basis of sustainable development of Jiangxi province.
Number of references:29
Main heading:Information use
Controlled terms:Ecology - Ecosystems - Estimation - Image reconstruction - Land use - Planning - Rating - Remote sensing - Sustainable development
Uncontrolled terms:Development assessments - Ecological deficit - Ecological footprint - Ecological services - Ecological severs value - Ecosystem services - Evaluation Method - Human activities - Jiangxi Province - Land use dynamics  - Regional sustainable development - Remote sensing images - Unsustainable development
Classification code:911.2 Industrial Economics - 903.3 Information Retrieval and Use - 902.2 Codes and Standards - 921 Mathematics - 741 Light, Optics and Optical Devices - 454.3 Ecology and Ecosystems - 403 Urban and Regional Planning and Development - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2011.11.058
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 33>

Accession number:20114714541942
Title:FIS-based method to generate bivariate control parameters regulation sequence for fertilization
Authors:Gu, Yuxue (1); Yuan, Jin (1); Liu, Chengliang (1)
Author affiliation:(1) State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China
Corresponding author:Liu, C.(chlliu@sjtu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:134-139
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to effectively coordinate the conflicts between the limited computing power of VMC (Vehicle Mounted Computer) and the accuracy and consistency of FS (fertilization seeding), a FIS-Based (fuzzy inference system) method which could generate near-optimum bivariate control parameters regulation sequence for FS was presented in this paper. The method took into account the relationship between the approaching three FS rate, and output near-optimum opening length and rotational speed in real time. It could eliminate the occurrence of big opening length with small rotational speed when fertilization rate was small, and reduced impact of pulsation of the outer genera mechanism. The laboratory experiment showed this method effectively coordinated the conflicts between the limited computing power of VMC and the accuracy and consistency of FS. Its average error was 4% smaller than the common method, and it also avoided the phenomenon of motor halt at extreme condition. The field test showed this kind of applicator could response to the instruction in time, and had good accuracy and consistency.
Number of references:16
Main heading:Computer control systems
Controlled terms:Control systems - Fuzzy inference - Models - Real time systems
Uncontrolled terms:Average errors - Bivariate - Computing power - Control parameters - Extreme conditions - Fertilization rates - Field test - Fuzzy inference systems - Laboratory experiments - Real time  - Rotational speed
Classification code:721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 722.4 Digital Computers and Systems - 731.1 Control Systems - 902.1 Engineering Graphics
DOI:10.3969/j.issn.1002-6819.2011.11.026
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 34>

Accession number:20114714541944
Title:Monitoring freeze injury and growth recovery of winter wheat based on change vector analysis
Authors:Wang, Huifang (1); Gu, Xiaohe (2); Dong, Yingying (1); Wang, Jihua (1); Huang, Wenjiang (2); Guo, Wei (2); Wang, Dacheng (1); Wang, Kun (2)
Author affiliation:(1) Institute of Agriculture Remote Sensing and Information System Application, Zhejiang University, Hangzhou 310012, China; (2) Beijing Research Centre for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Gu, X.(guxh@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:145-150
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Currently, the basic method of monitor winter wheat freeze injury is concentrated on temperature retrieval and compared with normalized difference vegetation index before and after freeze injury. However, temperature is not only reason for freeze injury, and normalized difference vegetation index can lead to overestimate the winter wheat coverage before closing. So this paper selected the analysis of change vector which based on multi-temporal vegetation indexes to improve the monitoring freeze injury accuracy. Winter wheat freeze injury of Gaocheng as study object, various vegetation indexes were extracted from multi-temporal HJ data, change vector was built and the trend of dynamic changing was analyzed, combined with the sensitivity analysis of winter wheat freeze injury spectral character, the model of monitoring freeze injury situation disaster remote sensing was built, and monitoring the degree of growth recover. The result showed that the change vector analysis could reflect the distribution and degree of winter wheat freeze injury and recovery. Meantime the change vector model which based on the structure insensitive pigment index had the highest accuracy during based on the other vegetation indexes model, in addition, the model verification results were 83.3%, 88.9%, respectively. So the method of change vector analysis was effective for monitoring winter wheat freeze injury and growth recovery. This study could supply a new way to monitoring the other crop disaster.
Number of references:17
Main heading:Crops
Controlled terms:Freezing - Growth (materials) - Monitoring - Recovery - Remote sensing - Sensitivity analysis - Vectors - Vegetation
Uncontrolled terms:Change vector analysis - Freeze-injury - Growth recovery - Model verification - Multi-temporal - Normalized difference vegetation index - Spectral characters - Temperature retrieval - Vector models - Vegetation index  - Winter wheat
Classification code:951 Materials Science - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921.1 Algebra - 822.2 Food Processing Operations - 821.4 Agricultural Products - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 731.1 Control Systems - 531 Metallurgy and Metallography
DOI:10.3969/j.issn.1002-6819.2011.11.028
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 35>

Accession number:20114714541956
Title:Effects of pulverized and ammoniated straw on soil bulk density and soil water-holding characteristics
Authors:Wang, Zengli (1); Wang, Zhen (1); Feng, Hao (1)
Author affiliation:(1) Institute of Water Saving Agriculture in Arid Areas of China, Northwest Agricultural and Forest University, Yangling 712100, China; (2) Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China
Corresponding author:Feng, H.(nercwsi@vip.sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:211-215
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to resolve the problems of slow straw decomposition, crop pests and lack of nitrogen during the straw returning, indoor soil columns experiments were conducted and effects of the soil decomposition rates of powdered straw with different C/N ratios on soil bulk density, soil water holding capacity were analyzed. The results showed that the powdered size of straw had little effect on its decomposition rate in the short term, while the decomposition rate of powdered straw was significantly higher than that of long straw at the later stage. Thus ammoniation could significantly speed up the decomposition rate of straw. Powdered straw decreased soil bulk density more significantly than long straw. Throughout the whole experiment, the soil bulk density of straw treated with powdered and ammoniated straw was significantly lower than that of other treatment after the same incubation. The water-holding capacity of all the straw utilization treatments has little difference, however the powdered and ammoniated straw could significantly increase soil drought tolerance. This research can provide a theoretical basis for exploring a new way of straw returning to get the maximum benefit in soil improvement.
Number of references:19
Main heading:Soil moisture
Controlled terms:Agronomy - Decomposition - Experiments - Straw
Uncontrolled terms:Ammoniation - C/N ratio - Decomposition rate - Short term - Soil bulk density - Soil column - Soil decomposition - Soil drought - Soil improvement - Soil water holding capacity  - Soil water holdings - Theoretical basis - Water holding capacity
Classification code:483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 821.3 Agricultural Methods - 821.5 Agricultural Wastes - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2011.11.040
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

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Accession number:20114714541919
Title:Finite element mode analysis and experiment of corn stubble harvester
Authors:Quan, Longzhe (1); Tong, Jin (1); Zeng, Baigong (1); Chen, Donghui (1)
Author affiliation:(1) Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130012, China; (2) College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Tong, J.(jtong@jlu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:15-20
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the performance of corn stubble harvester, the finite element analysis and mode test were conducted, and the first 20 frequencies and corresponding mode shapes were obtained. The results showed that there was a torsion deformation of the screening conveyor device in the first to the fifth (8.5-29.6 Hz) modes, and there was a bend torsion deformation of beam and principal axis in the sixth to the fourteenth (44.1-124 Hz) modes, and there was also a bend torsion deformation of the tip of components in the fifteenth to the twentieth (135-190 Hz), which could be used to analyze the vibration characteristics of the machine and optimize the mechanical system.
Number of references:15
Main heading:Finite element method
Controlled terms:Agricultural machinery - Bending (deformation) - Harvesters - Machine components - Torsional stress - Vibration analysis
Uncontrolled terms:Corn stubble - Finite Element - Mechanical systems - Mode analysis - Mode shapes - Mode test - Principal axis - Torsion deformation - Vibration characteristics
Classification code:421 Strength of Building Materials; Mechanical Properties - 601.2 Machine Components - 821.1 Agricultural Machinery and Equipment - 921.6 Numerical Methods - 943.2 Mechanical Variables Measurements
DOI:10.3969/j.issn.1002-6819.2011.11.003
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 37>

Accession number:20114714541948
Title:Optimal planning method for medium voltage distribution network
Authors:Meng, Xiaofang (1); Piao, Zailin (1); Wang, Yingnan (2); Zhou, Dongsheng (1); Hu, Bo (1)
Author affiliation:(1) College of Information and Electric Engineering, Shenyang Agricultural University, Shenyang 110161, China; (2) Shenyang Power Supply Corporation, Shenyang 110003, China
Corresponding author:Piao, Z.(piaozl@china.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:164-169
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The purpose of this paper was to improve the planning level of medium voltage distribution network. On the basis of the shortest path and minimum load moment algorithm, and under constraint conditions such as physical conditions, branch current, node voltage conditions, and so on. The method was proposed, which could be used to determine the main line, to connect load node, to automatically search the cross point (intermediate nodes), and to select section of the lines. The ordering technology of nodes and branches were presented before and after the lines connected, and the adjacent join points between two lines could be automatically searched for connecting adjacent lines hand in hand. Finally the function of automatic routing was achieved between adjacent lines. By calculation, analysis and comparison of the actual data from rural power network, the real example planning results showed that the proposed approach could automatically form network, choose the type of each branch of the network, ensure the branch current, active power loss rate and node voltage of the two lines in the area of constraints before and after the lines were connected, and indicated that it was an effective optimal planning method of distribution network. The method could provide the necessary support of data and technology to optimal planning distribution network.
Number of references:16
Main heading:Optimization
Controlled terms:Electric network analysis - Electric power distribution - Graph theory - Networks (circuits) - Reliability - Reliability analysis - Voltage distribution measurement - Voltage dividers
Uncontrolled terms:Active power loss - Adjacent lines - Automatic routing - Branch currents - Constraint conditions - Cross point - Distribution network - Intermediate node - Join point - Load node  - Loads - Medium-voltage distribution networks - Minimum load - Node voltages - Optimal planning - Optimal planning method - Physical conditions - Power networks - Real example - Shortest path  - Shortest path method - Two-line
Classification code:942.2 Electric Variables Measurements - 921.5 Optimization Techniques - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 913 Production Planning and Control; Manufacturing - 706.1.2 Electric Power Distribution - 704.2 Electric Equipment - 703.1.1 Electric Network Analysis - 703.1 Electric Networks - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2011.11.032
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 38>

Accession number:20114714541926
Title:Model correlation between calculated and experimental mode of 4105 diesel engine crankshaft
Authors:Li, Xiaohua (1); Shen, Bei (1); Cai, Yixi (1); Jiang, Yong (1); Zhang, Kai (1)
Author affiliation:(1) School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Shen, B.(sdubei@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:51-55
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Finite elements mode and experimental mode of 4105 diesel engine crankshaft were analyzed respectively in order to get the vibration characteristics of 4105 engine crankshaft and verify the correctness of finite element model. The corresponding vibration frequencies and models were obtained. The inner product correlation degrees between the two kinds of model were calculated and the vibration mode were compared. The results showed that the inner products correlation degree between the calculated mode and the experimental mode was a high correlation, with coefficient of 0.7, which verified the effectiveness of the finite element model. The comparison between the finite element mode and the experimental mode showed that the maximum deformation mostly occurred at the end of the crankshaft. The research on mode correlation confirmed the natural vibration characteristics of crankshaft, and can provide a reference for crankshaft design optimization and vibration reduction by crankshaft finite element.
Number of references:16
Main heading:Crankshafts
Controlled terms:Correlation methods - Diesel engines - Finite element method - Optimization - Vibration analysis
Uncontrolled terms:Correlation degree - Design optimization - Engine crankshafts - Experimental modes - Finite Element - Finite element calculations - Finite element models - Inner product - Mode correlation - Model correlation  - Natural vibration characteristic - Vibration characteristics - Vibration frequency - Vibration modes - Vibration reductions
Classification code:601.2 Machine Components - 612.2 Diesel Engines - 921.5 Optimization Techniques - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 943.2 Mechanical Variables Measurements
DOI:10.3969/j.issn.1002-6819.2011.11.010
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 39>

Accession number:20114714541953
Title:Modeling and experiment of water and nitrogen balance in paddy fields under water saving irrigation and controlled drainage
Authors:Tan, Xuezhi (1); Shao, Dongguo (1); Liu, Huanhuan (1); Sun, Chunmin (1)
Author affiliation:(1) State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
Corresponding author:Tan, X.(txz345006@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:193-198
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to investigate the transformation processes of nitrogen in paddy field under water saving irrigation and controlled drainage, experiments of the water and nitrogen measurements were conducted during the rice growth period in 2007-2008. A water and nitrogen balance model was developed on the basis of first order dynamic response equation of physical process of nitrogen. The model was coupled with leakage and nitrogen uptake process and the water balance model in the paddy fields. It was applied with data obtained from two year experiments to simulate the daily water leakage. The daily amount of nitrate and ammonium in all nitrogen transformation process was also calculated. Results showed that 54.7% water of precipitation and irrigation was drained and leaked out of experiment field. The gas losses including volatilization and denitrification and leakage of nitrogen were dominating ways to lose nitrogen in paddy field under water saving irrigation and controlled drainage. The quantity of volatilization and denitrification accounts for 30.6% and 36.1% of nitrogen quantity respectively. Leakage of nitrogen was distinctly more than that of ammonium, while the surface drainage ammonium was more than nitrate. The amount of nitrogen leakage was also considerably high. The ratio of leakage ammonium to the corresponding form nitrogen quantity was 9.8% and that of nitrate quantity was 29.5%. Thus reducing gaseous nitrogen losses is beneficial to improve nitrogen use efficiency in paddy field under water saving irrigation and controlled drainage.
Number of references:18
Main heading:Nitrogen
Controlled terms:Ammonium compounds - Computer simulation - Denitrification - Drainage - Dynamic response - Experiments - Irrigation - Water conservation
Uncontrolled terms:Controlled drainage - First order - Gas loss - Gaseous nitrogen - Growth period - Model simulation - Nitrogen balance - Nitrogen measurements - Nitrogen transformations - Nitrogen uptake  - Nitrogen-use efficiency - Paddy fields - Physical process - Response equations - Surface drainage - Transformation process - Under water - Water balance - Water balance models - Water leakage
Classification code:901.3 Engineering Research - 821.3 Agricultural Methods - 804 Chemical Products Generally - 802.2 Chemical Reactions - 723.5 Computer Applications - 502 Mines and Quarry Equipment and Operations - 444 Water Resources - 442 Flood Control; Land Reclamation - 408.1 Structural Design, General - 406 Highway Engineering - 401 Bridges and Tunnels
DOI:10.3969/j.issn.1002-6819.2011.11.037
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 40>

Accession number:20114714541921
Title:Design and field experiments of 2BFM-5 hilly no-tillage seeder
Authors:Sun, Wei (1); Wu, Jianmin (1); Huang, Xiaopeng (1); Sun, Bugong (1); Hu, Jingming (1); Dai, Fei (1)
Author affiliation:(1) College of Engineering, Gansu Agricultural University, Lanzhou 730070, China
Corresponding author:Wu, J.(wujm@gsau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:26-31
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to the operational requirements for stubble mulch no-till sowing and drought-resistance sowing in the water erosion area of Loess Plateau, 2BFM-5 hilly no-till seeder has been developed, whose power source was a hand tractor with 8.8-11.0 kW power. The seeder adopted the long-wing and cusp combined opener in which the seed and the fertilizer were discharged separately, and the double-wheel profiling mechanism with ante-position compound hinges and the helical tooth fluted wheel. The field experiment showed that the seeding uniformity variation coefficient of this seeder was 35.4%, sowing depth qualified rate was 81.8%. The average distance between seed and fertilizer was 44.0 mm, the fertilizer was concentrated in the soil range of 90-100 mm, and the ground surface could form the small furrow which width was 66-85 mm and depth was 40-52 mm. Every technical performance indices met the requirement of agricultural planting. This seeder is adapt to the no-till sowing in gentle slop (less than 15&deg;)and the level terrace of the water erosion area of Loess Plateau in our China, and also to the seeding technique requirement of "deep sowing and shallow covering, compacting and moisture preservation, rainfall harvesting and drought resistance" and so on in rain fed agricultural region.
Number of references:21
Main heading:Agricultural machinery
Controlled terms:Agriculture - Design - Drought - Erosion - Experiments - Fertilizers - Gears - Machine design - Rain - Seed  - Wheels
Uncontrolled terms:Average Distance - Drought resistance - Field experiment - Ground surfaces - Hand tractor - Helical teeth - Hilly and water erosion area - Loess Plateau - Moisture preservation - No tillage  - No-till - Operational requirements - Power sources - Seeding techniques - Stubble mulch - Technical performance - Variation coefficient - Water erosion
Classification code:901.3 Engineering Research - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 601.2 Machine Components - 601 Mechanical Design - 483 Soil Mechanics and Foundations - 443.3 Precipitation - 408 Structural Design - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2011.11.005
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 41>

Accession number:20114714541984
Title:Adulteration detection of honey based on near-infrared spectroscopy
Authors:Tu, Zhenhua (1); Zhu, Dazhou (3); Ji, Baoping (1); Chen, Hongqian (1); Qing, Zhaoshen (1)
Author affiliation:(1) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (2) China Food Industry Promotion Center, Beijing 100062, China; (3) Nation Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Qing, Z.(qingzhaoshen@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:382-387
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Near infrared spectroscopy combined with pattern recognition methods was used to discriminate the unadulterated and adulterated honey samples. Various crude honey samples from different area in China were collected, and the adulterated honey were prepared according to typical adulteration method, adulteration substance and construction in the market. FT-NIR spectrometer was used to measure the trans-reflectance spectra of honey. The differentiation models for adulteration of honey were constructed by four kinds of pattern recognition methods, including partial least squares discriminate analysis (PLS-DA), soft independent modeling of class analogy (SIMCA), error back propagation network (BP-ANN), least-squares support vector machine (LS-SVM). The results showed that four methods could all correctly differentiate honey samples that were adulterated with high fructose syrup and fructose-plus-glucose solutions. For the adulteration of high fructose syrup, the classification accuracy of calibration set was above 95%, and the classification accuracy of prediction set was above 87%. For the adulteration of fructose-plus-glucose solutions, the classification accuracy of both calibration set was above 93%, and the classification accuracy of prediction set was above 84%. Compared with the four kinds of models, it was found that LS-SVM had the best results, the classification accuracy for both calibration set and prediction set were 100% for two kinds of adulteration. The present study indicated that the fast and accurate differentiation of the adulteration of honey by NIR spectra was feasible.
Number of references:17
Main heading:Food products
Controlled terms:Algorithms - Backpropagation - Calibration - Forecasting - Fructose - Glucose - Infrared devices - Infrared spectroscopy - Least squares approximations - Near infrared spectroscopy  - Pattern recognition - Spectrometers - Support vector machines
Uncontrolled terms:Classification accuracy - Discriminate analysis - Error back propagation - Honey - Least squares support vector machines - NIR spectrum - Partial least squares - Pattern recognition method - Soft independent modeling of class analogies
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 - 921.6 Numerical Methods - 921 Mathematics - 822.3 Food Products - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television
DOI:10.3969/j.issn.1002-6819.2011.11.071
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 42>

Accession number:20114714541952
Title:Simulated experiment of mixing zone depth under rainfall-runoff conditions
Authors:Tian, Kun (1); Huang, Chihua (2); Tian, Peng (3); Wang, Guangqian (1); Fu, Xudong (1)
Author affiliation:(1) State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China; (2) USDA-ARS National Soil Erosion Research Laboratory, West Lafayette, IN 47907-2077, United States; (3) College of Water Resources and Architectural Engineering, Northwest Agricultural and Forestry University, Yangling 712100, China
Corresponding author:Huang, C.(chihua@purdue.edu)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:188-192
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Mixing zone depth is an important parameter in chemical transport from soil into surface runoff, which implies chemical transport extent and loss. It provides the basic data for calibrating the model parameter. An indoor experiment was conducted to study the mixing zone depth during chemical transport from soil to runoff. Different vertical hydraulic gradients were imposed by setting the flow cell to free drainage condition (-5 cm), saturation condition and artesian seepage conditions (5 cm) under simulated rainfall at 3, 6 and 9 cm/h and simulated flow rate to rainfall at 2, 4 and 10 times of simulated rainfall. Results showed that mixing zone depth increased linearly with rainfall intensity. The mixing zone depth increased inversely with runoff flow rate under free drainage condition, but increased linearly under artesian seepage conditions. Thus the mixed zone depth is a multi-directional, complex dynamic chemical transfer quantity.
Number of references:19
Main heading:Runoff
Controlled terms:Experiments - Flow rate - Mixing - Rain - Seepage - Soils
Uncontrolled terms:Artesian - Chemical transfer - Chemical transport - Complex dynamics - Drainage condition - Flow cells - Hydraulic gradients - Indoor experiment - Mixing zones - Model parameters  - Multi-directional - Rainfall intensity - Rainfall runoff - Saturation conditions - Simulated experiments - Simulated rainfall - Surface runoffs
Classification code:802.3 Chemical Operations - 631 Fluid Flow - 483.1 Soils and Soil Mechanics - 901.3 Engineering Research - 444.1 Surface Water - 441 Dams and Reservoirs; Hydro Development - 407 Maritime and Port Structures; Rivers and Other Waterways - 443.3 Precipitation
DOI:10.3969/j.issn.1002-6819.2011.11.036
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 43>

Accession number:20114714541961
Title:Numerical simulation of airflow pattern and calculation of crop transpiration in plastic greenhouse
Authors:Sun, Huaiwei (1); Yang, Jinzhong (2); Wang, Xiugui (2)
Author affiliation:(1) School of Hydropower and Information Engineering, Huazhong Univ. of Sci. and Technol., Wuhan 430074, China; (2) State Key Laboratory of Water Resources and Hydropower Engineering Sciences, Wuhan University, Wuhan 430072, China
Corresponding author:Yang, J.(jzyang@whu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:236-241
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to analyze the airflow pattern and crop evapotranspiration in the plastic greenhouse. Based on computational fluid dynamics simulation, the natural ventilation process in the common plastic greenhouse in East China was performed, and the relationship between the inside ventilation rate and outside wind rate was also established. The aim of the simulation was to investigate the airflow pattern inside the greenhouse and determinate the ventilation parameter related to transpiration. A simple model based on the energy balance model and the turbulent diffusion model had been developed. The model was verified with a non-stress crop with only the inside measured air temperature and outside climate data. The simulated greenhouse crop transpiration was compared with the measurement data and they were found to agree well with each other. Moreover, the correlation determination coefficient between the simulated and measured daily transpiration was 0.776, which of accumulated transpiration was 0.998. While the standard error and the maximum absolute deviation between the simulated and measured accumulated transpiration were 1.16 mm and 4.82 mm. Results show that the equation established need less parameters and the wind parameters inquired were suitable for ordinary greenhouses. This study could meet the needs of crop water management, greenhouse design, and regional water management.
Number of references:18
Main heading:Greenhouses
Controlled terms:Calculations - Climate models - Computational fluid dynamics - Crops - Transpiration - Ventilation - Water management - Water supply
Uncontrolled terms:Absolute deviations - Air temperature - Airflow patterns - Climate data - Computational fluid dynamics simulations - Crop evapotranspiration - Determination coefficients - East China - Energy balance models - Greenhouse crops  - Greenhouse design - Measurement data - Model-based OPC - Natural ventilation - Plastic greenhouse - Simulation - Standard errors - Turbulent diffusion - Ventilation rate - Wind parameters
Classification code:921.6 Numerical Methods - 921 Mathematics - 821.6 Farm Buildings and Other Structures - 821.4 Agricultural Products - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 721 Computer Circuits and Logic Elements - 643.5 Ventilation - 643 Space Heating, Ventilation and Air Conditioning - 446.1 Water Supply Systems - 446 Waterworks - 444 Water Resources - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2011.11.045
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 44>

Accession number:20114714541932
Title:Numerical simulation of vortex-generator design in soil wind erosion tunnel based on porous medium model
Authors:Gao, Ying (1); Jin, Taosheng (1); Zhao, Yanlin (1); Ji, Yaqin (1); Xu, Rangshu (2); Wu, Liping (1)
Author affiliation:(1) Environ. Protection Lab. of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; (2) Institute of Aeronautical Engineering, Shenyang Aerospace University, Shenyang 110136, China; (3) Department of Environmental and Municipal Engineering, Tianjin Urban Construction Institute, Tianjin 300384, China
Corresponding author:Jin, T.(jints@nankai.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:85-89
Language: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, Fluent, a kind of CFD (computational fluid dynamics) software, was used to simulate the turbulence flow on typical wind erosion field surface in NK-1 transportable wind tunnel. A new method was introduced in the porous media model to simplify the practical irregular geometric grids of vortex-generator, and then to get the optimal distribution of stick grid-roughness elements. The effectiveness was validated by wind tunnel experiments. The results showed that the correlation coefficient between the profile obtained in wind tunnel and the simulated one was 0.974. In conclusion, the application of the new method can save time and improve the precision in calculation.
Number of references:18
Main heading:Computer simulation
Controlled terms:Computational fluid dynamics - Computer software - Erosion - Geologic models - Numerical methods - Porous materials - Turbulence - Vortex flow - Wind tunnels
Uncontrolled terms:Fluent - Porous media model - Stick grid-roughness element - Vortex-generator - Wind erosion
Classification code:951 Materials Science - 921.6 Numerical Methods - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 651.2 Wind Tunnels - 631.1 Fluid Flow, General - 483 Soil Mechanics and Foundations - 481.1 Geology - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2011.11.016
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 45>

Accession number:20114714541980
Title:Parameter optimization of granulated alfalfa pelleting process based on extrusion simulation experiment
Authors:Huang, Xiaopeng (1); Wan, Fangxin (2); Huang, Jianlong (1); Wu, Jingfeng (2); Zhang, Keping (2)
Author affiliation:(1) College of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (2) College of Engineering, Gansu Agricultural University, Lanzhou 730070, China
Corresponding author:Huang, J.(huangjianlonglut@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:354-358
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To obtain the best pelletizing process of alfalfa pellet, the granulated alfalfa as the pelletizing material, through the simulation experiment of pelletizing with ring die and using the quadratic regression orthogonal rotational combining design, the relationships of granulation density with extrusion force, material moisture content and size were studied, and the mathematical model between factors and the density of the granulation was established. The result showed that: regression equation was significant; the three factors affecting the density of the granulation was: extrusion force &gt; material moisture content &gt; size. Through the simulating excellent-choosing equation, the best parameter combination under the simulation experiment conditions was obtained as follows: extrusion force was 5.47 kN, the material moisture content was 16.96%, size was 6.34 mm, the density of the granulation was 1.241 g/cm³. The results can provide academic guidance for improving the quality of alfalfa pellet or other granular products.
Number of references:20
Main heading:Pelletizing
Controlled terms:Computer simulation - Experiments - Extrusion - Granulation - Mathematical models - Moisture - Moisture determination - Optimization - Quality control - Regression analysis
Uncontrolled terms:Extrusion force - Extrusion simulation - Granular products - Granulated alfalfa - Parameter - Parameter combination - Parameter optimization - Pelleting process - Pelleting process simulation - Quadratic regression  - Regression equation - Simulation experiments
Classification code:922.2 Mathematical Statistics - 921.5 Optimization Techniques - 921 Mathematics - 913.3 Quality Assurance and Control - 944.2 Moisture Measurements - 901.3 Engineering Research - 801.4 Physical Chemistry - 723.5 Computer Applications - 535.2.2 Metal Forming Practice - 802.3 Chemical Operations
DOI:10.3969/j.issn.1002-6819.2011.11.066
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 46>

Accession number:20114714541931
Title:Numerical simulation of internal flow field in three-stage centrifugal fan of grain sucker
Authors:Ding, Wensi (1); He, Xiangbin (1)
Author affiliation:(1) College of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641, China
Corresponding author:Ding, W.(wsding@scut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:78-84
Language: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 catch the figure of internal flow field of multi-stage centrifugal fan, centrifugal fan of a pneumatic grain sucker was used as the research object in this thesis, three-dimensional steady and compressible computation was performed for its whole internal flow by using FLUENT 6.3 software. During the course of the calculation, the accuracy and efficiency of computation were overall considered, the model of all channels were built by using Pro/E as a solution domain, the MRF(moving reference frame)method was used to realize real-time transmission of flow parameters among each stage impeller, the RNG(Renormalization Group) k-&Epsilon; turbulent model and method of Roe-FDS(Roe flux difference splitting)flux difference with first order upwind spatial discrete schemes were used to realize the simulation. According to the result, the distribution diagrams of pressure and velocity in the main area were provided, through analyzing it was found that flow velocity of gas between each impeller maintains the same level, but static pressure and total pressure increase gradually, and except the third impeller, the distribution of flow field in the first and second impeller is mostly symmetrical. Through analyzing the internal flow field of volute, the design defect of this fan that gas could not flow smoothly in the small part of volute was discovered, and the advice for improving volute structure was given, which provides reference for improving the efficiency of the fan.
Number of references:19
Main heading:Computer simulation
Controlled terms:Centrifugation - Computer software - Fans - Flow fields - Impellers - Statistical mechanics - Structural frames
Uncontrolled terms:Centrifugal fans - Design defects - Discrete scheme - Distribution diagram - First order - Flow parameters - Flux difference - Flux difference splitting - Internal flow field - Internal flows  - Moving reference frame - Multi-stage - Real-time transmissions - Renormalization group - Research object - Series - Static pressure - Total pressure - Turbulent models - Velocity of gas
Classification code:802.3 Chemical Operations - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 931.1 Mechanics - 631.1 Fluid Flow, General - 601.2 Machine Components - 408.2 Structural Members and Shapes - 618.3 Blowers and Fans
DOI:10.3969/j.issn.1002-6819.2011.11.015
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 47>

Accession number:20114714541945
Title:Three-dimensional reconstruction of virtual plants branch structure based on quasi binary-tree
Authors:Fang, Kui (1); Jing, Song (1); Shen, Luming (1); Chen, Yan (1)
Author affiliation:(1) Information Science and Technology College, Hunan Agricultural University, Changsha 410128, China
Corresponding author:Jing, S.(jingsong2004172@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:151-154
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to extract the growth rules of natural branching plants more efficiently, this essay proposed a method of dimensional reconstruction of the Virtual Plants growth based on the structure of quasi binary-tree after a deep analysis of the L system. This method simplifies branching plants growth rules by using quasi binary-tree structure and describes the topological structure of plants under the L system. The result of the actual trees simulation shows that this method can describe the plants growth rules efficiently and provide a new way for the extraction of plants growth rules.
Number of references:17
Main heading:Three dimensional
Controlled terms:Binary trees - Computer simulation - Forestry - Fractals - Trees (mathematics)
Uncontrolled terms:Branch structure - L-systems - Quasi binary-trees - Three dimensional reconstruction - Topological structure - Virtual plants
Classification code:723.5 Computer Applications - 821.0 Woodlands and Forestry - 921 Mathematics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
DOI:10.3969/j.issn.1002-6819.2011.11.029
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 48>

Accession number:20114714541978
Title:Methodology of agricultural landscape classification with rural scale and its application in planning of new rural construction
Authors:Liang, Fachao (1); Liu, Liming (1); Qu, Yanbo (1)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
Corresponding author:Liu, L.(liulm@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:330-336
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Agricultural landscape classification is not only the basis of the work on planning of the new rural construction, but also the prerequisite for its evaluation, planning and design. According to the requirements of the new rural construction and the characteristics of agricultural land consolidation in China, this paper proposed methodology of structural and functional classification of agricultural landscape at rural scale based on agricultural landscape function, the correction method of location and rural household economic behavior and terrain niche index. This methodology includes two- layers' classification system of landscape type and landscape subtype. A case study on agricultural landscape was carried out in a typical region named Yukou town of Pinggu District, Beijing. As a result four landscape types, such as namely agricultural production landscape, agricultural service landscape, agricultural leisure tourism landscape and agricultural ecological landscape and 13 landscape subtypes were classified. With the help of the spatial analysis module in GIS, the map of agricultural landscape classification of Yukou town was drawn, and then the classification achievements applied into land consolidation were explored. Results showed that the classification of structure and function of agricultural landscape was not only a methodology that could meet the requirements of both the planning of the new rural construction and agricultural land consolidation at large scale, but also took the characteristics of structure and function of agricultural landscape into account.
Number of references:22
Main heading:Agriculture
Controlled terms:Classification (of information) - Land use - Rural areas
Uncontrolled terms:Agricultural land - Agricultural landscapes - Agricultural productions - Classification system - Correction method - Functional classification - ITS evaluation - Landscape type - New rural - Planning and design  - Rural households - Scale - Spatial analysis - Yukou town
Classification code:403 Urban and Regional Planning and Development - 716.1 Information Theory and Signal Processing - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2011.11.062
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 49>

Accession number:20114714541938
Title:Effect of energy density on removal of particulate matter and NOx emissions from diesel engine
Authors:Zhang, Lin (1); Cai, Yixi (1); Wang, Pan (1); Yan, Yazhou (1); Zheng, Rongyao (1)
Author affiliation:(1) School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Cai, Y.(qc001@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:116-119
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:On the basis of the dielectric barrier discharge theory, a non-thermal plasma reactor was designed and the relationship between the energy density and working voltage was investigated. LaMnO<inf>3</inf> catalyst was loaded on the ceramic honeycomb schedules by the means of citrate-gel method. The non-thermal plasma assisted LaMnO<inf>3</inf> catalyst system was established. The bench test was carried out to investigate the reduction of particulate matter and NO<inf>x</inf> emissions from diesel engine with NPAC technology. Results showed that the energy density of NTP generator increases with working voltage under different frequencies. The concentration of NO was significantly reduced, the concentration of NO<inf>2</inf> was increased obviously and the concentration of NO<inf>x</inf> decreased after NPAC technology. With the increase of energy density, soot smoke opacity was decreased and the maximum reduction was to 83%. The results show that particulate matter and NO<inf>x</inf> emissions can be effectively transformed by NPAC technology, NPAC technology has a broad prospect in the field of exhaust after treatment.
Number of references:15
Main heading:Diesel engines
Controlled terms:Catalysis - Catalysts - Dielectric devices - Electric discharges - Emission control - Flow control - Nitrogen oxides - Particulate emissions - Plasma applications - Plasmas  - Reduction - Technology
Uncontrolled terms:Bench tests - Catalyst system - Ceramic honeycombs - Citrate gel method - Dielectric barrier discharges - Different frequency - Energy density - Exhaust aftertreatment - Non-thermal plasma reactors - Nonthermal plasma  - NOx Emissions - Particulate Matter - Smoke opacity - Working voltage
Classification code:932.3 Plasma Physics - 901 Engineering Profession - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.2 Chemical Reactions - 714 Electronic Components and Tubes - 704 Electric Components and Equipment - 701.1 Electricity: Basic Concepts and Phenomena - 631.1 Fluid Flow, General - 612.2 Diesel Engines - 451.2 Air Pollution Control - 451.1 Air Pollution Sources
DOI:10.3969/j.issn.1002-6819.2011.11.022
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 50>

Accession number:20114714541937
Title:Corrosion performance on copper in biodiesel from cottonseed oil
Authors:Chen, Jinsi (1); Hu, Enzhu (1); Wang, Xiangyang (1); Xu, Yufu (1); Hu, Xianguo (1); Pan, Lijun (2); Jiang, Shaotong (2)
Author affiliation:(1) School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China; (2) School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author:Chen, J.(jinsi_chen@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:111-115
Language: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 national standard method of petroleum products copper corrosion test (GB/T5096-1990), the corrosion character on copper in cottonseed oil methyl ester(CSOME) and cottonseed oil ethyl ester(CSOEE) were detected at 25&deg;C and 50&deg;C. At the same time, the physical-chemical performances of the two samples were investigated and compared to diesel before and after corrosion. The results showed that variations of the corrosion phenomenon on copper which immersed in the two samples for two months at the 25&deg;Cand 50&deg;C. The corrosion property of CSOME was changed seriously. Under the condition of 25&deg;C, the copper corrosion rate was 0.0926 cm/d, and the acid value, the peroxide value, the kinetic viscosity increased by 10.4, 1.44, 1.13 times, respectively. Copper corrosion rate was 0.4115 cm/d and acid value, peroxide value, kinetic viscosity increased by 12.8, 2.16, 1.35 times respectively with temperature rising up to 50&deg;C. The variations of corrosion rate and properties of oils changed seriously with the temperature increasing. The corrosion character of CSOEE had the similar to the CSOME. The changes of diesel was slightly. The copper corrosion was ascribed to degradation of biodiesel. Data of copper corrosion could contribute to industrial application of CSOME or CSOEE.
Number of references:19
Main heading:Corrosion rate
Controlled terms:Biodiesel - Copper - Copper corrosion - Corrosion - Cottonseed oil - Diesel fuels - Esterification - Esters - Industrial applications - Oilseeds  - Oxidation - Viscosity
Uncontrolled terms:Acid value - Corrosion performance - Corrosion phenomena - Corrosion property - Cottonseed oil methyl ester - Ethyl esters - Kinetic viscosity - National standard - Peroxide value - Temperature rising
Classification code:822.3 Food Products - 821.4 Agricultural Products - 813 Coatings and Finishes - 804.1 Organic Compounds - 913 Production Planning and Control; Manufacturing - 802.2 Chemical Reactions - 544.1 Copper - 523 Liquid Fuels - 423 Non Mechanical Properties and Tests of Building Materials - 631.1 Fluid Flow, General
DOI:10.3969/j.issn.1002-6819.2011.11.021
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 51>

Accession number:20114714541920
Title:Kinematic analysis and performance experiment of cantilever cup vegetable transplanter
Authors:Zhang, Zuli (1); Wang, Junling (1); Zhang, Weizheng (1); Zhao, Xu (2); Liu, Wei (3)
Author affiliation:(1) College of Engineering, Shenyang Agricultural University, Shenyang 110866, China; (2) School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051, China; (3) Liaohe Petroleum Equipment Manufacturing Company, Panjin 124010, China
Corresponding author:Zhang, Z.(sauzhangzl@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:21-25
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to guarantee transplanting effect of seedlings better, in this paper, the working process of cantilever cup vegetable transplanter were introduced, and its kinematic analysis was carried out to obtain the velocity equation of the seedlings in the transplant process. According to the theoretical results, the structure of key components, such as ground wheel, planting wheel, planting apparatus, and so on, was designed reasonably, and the prototype was manufactured which were made up of above key components. The main performance indices of prototype machine were tested by experiments which were carried out in the laboratory soil trough using eggplant seedlings. The results showed that the qualified rate of planting spacing was 93.02%, the qualified rate of upright degree was 97.79%, the variation coefficient of planting depth was 0.78%, and the rate of damaged seedlings was 2.19%, so the machine can meet the actual production requirements. This theoretical model would provide reference for the follow-up study on cantilever cup vegetable transplanter.
Number of references:16
Main heading:Vegetables
Controlled terms:Agricultural machinery - Experiments - Kinematics - Machine components - Nanocantilevers - Seed - Structural design - Velocity - Wheels
Uncontrolled terms:Follow-up Studies - Key component - Kinematic analysis - Performance - Performance experiment - Performance indices - Production requirements - Prototype machine - Theoretical models - Theoretical result  - Variation coefficient - Velocity equation - Working process
Classification code:931.1 Mechanics - 901.3 Engineering Research - 821.4 Agricultural Products - 933 Solid State Physics - 821.1 Agricultural Machinery and Equipment - 601.2 Machine Components - 408.1 Structural Design, General - 761 Nanotechnology
DOI:10.3969/j.issn.1002-6819.2011.11.004
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 52>

Accession number:20114714541950
Title:Response of growth and yield of spring corn to drip irrigation uniformity and amount in North China plain
Authors:Zhang, Hang (1); Li, Jiusheng (1)
Author affiliation:(1) State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
Corresponding author:Li, J.(lijs@iwhr.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:176-182
Language: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 evaluate the suitability of the current design standard for drip irrigation uniformity, field experiments were conducted during growing seasons of spring maize (Zea mays L.) in 2009 and 2010 to study the effects of drip irrigation uniformity and amount on corn growth and yield. Three Christiansen uniformity coefficients (C<inf>u</inf>) of 0.66, 0.81, and 0.99 under three levels of irrigation amount (50%, 75%, and 100% of irrigation requirement) were used. The results showed that drip irrigation uniformity and amount had no significant effects on the mean of plant height and leaf area index. The uniformity coefficients for those parameters were increased with spring maize growing and reached more than 0.95 at the end of growing season. C<inf>u</inf> values of yield under different irrigation treatments were larger than 0.93 along the drip line. Drip irrigation uniformity and depth as well as their interaction had insignificant effects on the mean and the uniformity of yield. The results suggest that properly lowering the current design standard of drip irrigation uniformity coefficient (C<inf>u</inf>&ge;0.80) of maize in the semi-humid regions such as the north China plain cannot be unfavorable to the growth and yield of crops and can reduce the initial and operation costs of drip irrigation systems.
Number of references:21
Main heading:Irrigation
Controlled terms:Crops - Experiments - Grain (agricultural product) - Plants (botany)
Uncontrolled terms:Corn growth - Design standard - Drip irrigation - Drip irrigation systems - End of growing seasons - Field experiment - Growing season - Growth and yield - Irrigation treatments - Leaf Area Index  - North China Plain - Operation cost - Plant height - Spring corn - Spring maize - Uniformity coefficient - Yield
Classification code:461.9 Biology - 821.3 Agricultural Methods - 821.4 Agricultural Products - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2011.11.034
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 53>

Accession number:20114714541955
Title:Wind tunnel test on effect of strip width and crop stubble height on wind erosion modulus
Authors:Zhao, Peiyi (1); Tuo, Debao (1); Li, Huanchun (1); Duan, Yu (1); Wei, Fusuo (1); An, Hao (1); Jia, Youyu (1); Cui, Yan (1)
Author affiliation:(1) Institute of Plant Nutrition and Analysis of Inner-Mongolia Academy of Agricultural Sciences, Hohhot 010031, China; (2) Key Observation Station of Ecologic Environment of Ministry of Agriculture, Hohhot 010031, China; (3) Key Laboratory of Dryland. Farming of Inner-Mongolia, Hohhot 010031, China
Corresponding author:Zhao, P.(zhpy1972@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:206-210
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to investigate effects of strip width and stubble height on soil wind erosion modulus, in-situ test was conducted at soil wind erosion modulus by a movable wind tunnel in the strip intercropping farmland located at the north foot of Yinshan Mountain. The results showed that crop stubble could protect the intercropping farmland. The erosion modulus reached the minimum in the block keeping whole stubble, the maximum in the whole bare block and the medium in the intercropping strips keeping stubble and autumn ploughed. Effects of different crop stubble on wind erosion modulus were different. Comparing with the whole bare block, the wind erosion modulus decreased by 48.92%-67.39% and 5.22%-34.36% in the autumn-plough strip protected by oat stubble strip and rape stubble respectively. The wind erosion modulus exponentially increased with wind speed. Under the same wind speed, soil wind erosion modulus decreased with the width of strips keeping stubble increased from 0.5m to 3.0 m by power function and decreased linearly with the stubble height increased from 5 cm to 25 cm. The results showed that less tillage and keeping stubble are effective measures to reduce wind erosion.
Number of references:14
Main heading:Erosion
Controlled terms:Agricultural machinery - Crops - Soil conservation - Soils - Wind effects - Wind tunnels
Uncontrolled terms:Effective measures - In-situ test - Investigate effects - Power functions - Soil wind erosion - Soil wind erosion modulus - Strip intercropping - Strip-widths - Stubble height - Wind erosions  - Wind speed - Wind tunnel tests
Classification code:821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 651.2 Wind Tunnels - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 443.1 Atmospheric Properties - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2011.11.039
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 54>

Accession number:20114714541933
Title:Simulation of iteration method with stationary point in working process of internal combustion pump
Authors:Yang, Daozhai (1); Zhang, Hongxin (1); Jiang, Yong (1); Zhang, Tiezhu (1); Meng, Xiangzong (1)
Author affiliation:(1) College of Electromechanic Engineering, Qingdao University, Qingdao 266071, China
Corresponding author:Jiang, Y.(qdjy2008@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:90-94
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Iteration method with stationary point was put forward for making working process simulation of internal combustion pump more actual, comprehensive and embedded, in which, the required working condition rotational speed was the stationary point. Through iteration of the torque to crankshaft end according to the difference between required and simulating rotational speed, internal combustion pump (ICP) will converge at the required condition. Based on the computer aided design (CAD) software of Solid works and computer aided engineering (CAE) software of Adams, the virtual prototype of three-cylinder, ICP was constructed, then the principle, flow chart and application of iteration method with stationary point were described. Under calibrated working condition, the simulation of ICP can converge through 13 working cycles, and the running stability reaches 3.62% which can fullfill the application; the computational accuracy of angular speed of crankshaft is improved by 2.13% than traditional method.
Number of references:16
Main heading:Iterative methods
Controlled terms:Combustion - Computer aided design - Computer aided engineering - Computer aided software engineering - Computer simulation - Crankshafts - Engines - Pumps
Uncontrolled terms:Angular speed - Computational accuracy - Flow charts - Internal combustion - Iteration method - Rotational speed - Running stability - Stationary points - Virtual prototype - Working conditions  - Working cycle - Working process - Working process simulation
Classification code:521.1 Fuel Combustion - 601.2 Machine Components - 612 Engines - 618.2 Pumps - 723.5 Computer Applications - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2011.11.017
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 55>

Accession number:20114714541946
Title:Data normalization of leaf color based on fuzzy comprehensive evaluation for visualization model
Authors:Wang, Jucai (1); Xi, Lei (1); Zhao, Xiaoli (1); Ma, Xinming (1); Cao, Dianli (1); Xu, Xin (1)
Author affiliation:(1) College of Information and Management Science, Henan Agricultural University, Zhengzhou 450002, China; (2) College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
Corresponding author:Ma, X.(xinmingma@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:155-159
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the accuracy of data which was used in producing the model of leaf color in the process of visualization, taking the data of leaf color from maize as a research object, an evaluation system on the accuracy of chlorophyll data was created with the method of fussy comprehensive evaluation. Meanwhile, data of leaf color in different standard were translated and checked in this paper. The results showed that the absolute error between chlorophyll value translated from SPAD which was measured with the index of fuzzy comprehensive evaluation and the value translated from RGB was less than 0.111 mg/g, the accuracy degree of measured leaf-color model data was proved to reach level 2 which also represented exactness. The accuracy of chlorophyll data measure method under the evaluation system can meet the requirement for normalization of data acquisition of leaf color in the process of visualization.
Number of references:21
Main heading:Data visualization
Controlled terms:Chlorophyll - Color - Crops - Fuzzy set theory - Simulators - Visualization
Uncontrolled terms:Absolute error - Accuracy degree - Comprehensive evaluation - Data normalization - Evaluation system - Fuzzy comprehensive evaluation - Leaf color - Level 2 - Model data - Research object  - SPAD - Visualization models
Classification code:921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 902.1 Engineering Graphics - 821.4 Agricultural Products - 804.1 Organic Compounds - 741.1 Light/Optics - 671 Naval Architecture - 621 Nuclear Reactors
DOI:10.3969/j.issn.1002-6819.2011.11.030
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 56>

Accession number:20114714541958
Title:Effects of technology modes for sloping farm-land comprehensive control on soil water conservation and crop yield
Authors:Yang, Aizheng (1); Wei, Yongxia (1); Zhang, Zhongxue (1); Zhang, Baoli (3); Qi, Zhijuan (1)
Author affiliation:(1) College of Water Conservancy and Architecture, Northeast Agricultural University, Harbin 150030, China; (2) Key Laboratory of Water-Saving Agriculture of Heilongjiang Province, Harbin 150030, China; (3) Water Conservancy Department of Red Star Farm, Beian Bureau, Heilongjiang Land Reclamation Bureau, Beian 164000, China
Corresponding author:Wei, Y.(wyx0915@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:222-226
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to resolve ecological problems such as soil erosion, spring drought and the waterlogging of topsoil in the northern hill black soil region of the Song-nen Plain, four comprehensive technology modes composed by four measures (furrow damming, mole drain, pipe drain and surface drain) were proposed. Taking the slop farmland (3&deg;) in Red Star Farm as the research object, a 2-year field experiment was conducted in 2009-2010 and the effects of different technology modes on dynamic variation of soil water, soybean yield, water use efficiency, surface runoff and soil erosion were studied. The results showed that four comprehensive modes had positive effects both on soil and water erosion control and water use efficiency increasing, among which the mode of SAMQ (the combination of mole drain, pipe drain, surface drain and furrow damming) was the best. Compared with the conventional tillage, SAMQ increased the yield and water use efficiency by 27.3% and 23.9% respectively, and reduced surface runoff and soil erosion by 31.3 mm and 456 t/(km²&middota) respectively.
Number of references:15
Main heading:Erosion
Controlled terms:Drainage - Efficiency - Farms - Runoff - Soil moisture - Soils - Water conservation - Water supply
Uncontrolled terms:Furrow damming - Mole drain - Pipe drain - Soil erosion - Surface drain
Classification code:913.1 Production Engineering - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 502 Mines and Quarry Equipment and Operations - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 446.1 Water Supply Systems - 444.1 Surface Water - 444 Water Resources - 442.1 Flood Control - 442 Flood Control; Land Reclamation - 407 Maritime and Port Structures; Rivers and Other Waterways - 406 Highway Engineering - 401 Bridges and Tunnels
DOI:10.3969/j.issn.1002-6819.2011.11.042
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 57>

Accession number:20114714541951
Title:Two-dimensional model development and validation of surface water flow for border irrigation under anisotropic roughness
Authors:Zhang, Shaohui (1); Xu, Di (1); Li, Yinong (1); Bai, Meijian (1); Wei, Zhibin (2); Cui, Jingping (2); Feng, Bingkai (2)
Author affiliation:(1) Department of Irrigation and Drainage, China Institute of Water Resources and Hydropower Research, Beijing 100048, China; (2) Management Office of Yehe Irrigatim District in Hebei Province, Shijiazhuang 050200, China
Corresponding author:Zhang, S.(zhangsh@iwhr.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:183-187
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:It has an important theoretical and practical significance that an appropriate roughness model of border fields is adopted for evaluating and optimizing border irrigation system. Based on the two-dimensional complete hydraulic model of basin irrigation with vector type and constructing a basin surface anisotropic roughness model in source roughness vector by using tensor inverse operation, the two-dimensional surface water flow model of border irrigation under anisotropic roughness was developed. Base on the typical border irrigation experiments, the simulation effects of the proposed model and the model under isotropic roughness were analyzed and compared. The results showed that compared with the surface water flow model under isotropic roughness, the average relative error between simulation value and observation value of the proposed model decreased by 3.08-6.83 percentage point in the advance phase of surface water flow, and 2.5-6.81 percentage point in the recession phase. The results indicated that the two-dimensional surface water flow model of border irrigation based on anisotropic roughness can improve simulation effects of surface water flow and provide a good numerical simulation tools for border irrigation system design and performance evaluation.
Number of references:11
Main heading:Surface roughness
Controlled terms:Anisotropy - Computer simulation - Experiments - Flow of water - Hydraulic models - Irrigation - Models - Surface waters - Systems analysis - Two dimensional
Uncontrolled terms:Anisotropic - Average relative error - Border irrigation - Inverse operation - Percentage points - Performance evaluation - Roughness models - Simulation effects - Surface water flows - Two dimensional model  - Two-dimensional surface
Classification code:961 Systems Science - 931.2 Physical Properties of Gases, Liquids and Solids - 902.1 Engineering Graphics - 901.3 Engineering Research - 821.3 Agricultural Methods - 723.5 Computer Applications - 632.1 Hydraulics - 631.1.1 Liquid Dynamics - 444.1 Surface Water
DOI:10.3969/j.issn.1002-6819.2011.11.035
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 58>

Accession number:20114714541957
Title:Effects of different cultivation techniques on soil temperature, moisture and potato yield
Authors:Fan, Shijie (1); Wang, Di (1); Zhang, Junlian (1); Bai, Jiangping (1); Liu, Wenxian (3); Ma, Zhixia (3); Peng, Huiyuan (2)
Author affiliation:(1) Gansu Key Lab. of Crop Improvement and Germplasm Enhancement, College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (2) Potato Institute of Guizhou Province, Guiyang 550006, China; (3) Agriculture Bureau of Weining County in Guizhou Province, Weining 553100, China
Corresponding author:Wang, D.(Wangd@gsau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:216-221
Language: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 effects of plastic film mulching and green manuring on improving soil temperature and moisture in southwest cool mountain areas in China, an experiment was conducted in 2009-2010. Effects of four kinds of plastic film mulching and green manuring treatment combinations on soil temperature, soil water content and yield were studied. Results showed that compared with the conventional tillage technique treatment (CK), green manuring plastic mulching mode (GMPM) and simply plastic mulching model(PM) increased soil temperature (0-20 cm layer) by 3.6&deg;C and 2.9&deg;C per day respectively. GMPM, green manuring(GM) and plastic mulching model(PM) increased soil water content by 12.93%, 6.3% and 10.88% respectively (0-21 cm layer) from the sown day to the middle of strong growth period, GMPM and PM decreased the soil water content by 6.35% and 6.4% respectively after the middle of strong growth period when compared with CK. Meanwhile, the tuber yield of GMPM and PM increased by 25.6% and 2.3% respectively. Therefore GMPM can dramatically increase soil temperature and moisture of seedling stage, also increase tuber yield.
Number of references:23
Main heading:Geologic models
Controlled terms:Agriculture - Cultivation - Fertilizers - Manures - Plants (botany) - Plastic films - Soil moisture - Soils - Temperature
Uncontrolled terms:Conventional tillage - Plastic mulching - Potato yield - Soil temperature - Soil water content - Strong growth - Tuber yield
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 817.1 Polymer Products - 804 Chemical Products Generally - 641.1 Thermodynamics - 483.1 Soils and Soil Mechanics - 481.1 Geology - 461.9 Biology
DOI:10.3969/j.issn.1002-6819.2011.11.041
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 59>

Accession number:20114714541962
Title:Cooling effect of water-cooled cover on lying behavior of sows in summer
Authors:Li, Wei (1); Li, Baoming (1); Shi, Zhengxiang (1); Yan, Zhihui (1); Wang, Chaoyuan (1); Pang, Zhenzhen (1)
Author affiliation:(1) Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Li, B.(libm@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:242-246
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Heat stress for adult sows in summer is a technical problem, which always constrains pig production. A new water-cooled cover was exploited by using the underground water as the natural coolant based on the principle of radiant cooling. The objectives of this experiment were to study the cooling effect of the cover and the sows' selective behavior of the lying area under different internal temperatures of the piggery. The results showed that when the ambient temperature of piggery and inlet water temperature of water-cooled cover were 31.3&deg;Cand 21.5&deg;C, respectively, the black globe temperature inside the cover was 2.7&deg;C lower than that outside the cover. Compared with the skin temperature and respiratory rate of the control group, that of the experiment group was significantly lower. When the ambient temperatures were between 23-27&deg;C, 77% of sows lay on the outside exercising yard of the piggery, when the ambient temperatures were between&amp;gt;27-31&deg;C, 50% of sows lay under the cover, and when the ambient temperatures above 31&deg;C, 75% of sows lay under the cover. The number of sows lying under the cover increased with the increasing of the environmental temperatures. This experiment shows that the water-cooled cover can effectively alleviate heat stress for sows when ambient temperature is above the thermal comfort zone of the animals.
Number of references:16
Main heading:Behavioral research
Controlled terms:Animals - Cooling - Cooling water - Experiments - Farm buildings - Groundwater - Temperature - Thermal stress
Uncontrolled terms:Ambient temperatures - Control groups - Cooling effects - Cover - Dry sows - Environmental temperature - Heat stress - Inlet water temperatures - Internal temperature - Lying area  - Lying behavior - Pig production - Radiant cooling - Respiratory rate - Skin temperatures - Technical problem - Thermal comfort zone
Classification code:971 Social Sciences - 901.3 Engineering Research - 822 Food Technology - 821.6 Farm Buildings and Other Structures - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 814 Leather and Tanning - 641.2 Heat Transfer - 641.1 Thermodynamics - 616 Heat Exchangers - 471 Marine Science and Oceanography - 461 Bioengineering and Biology - 444.2 Groundwater - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2011.11.046
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 60>

Accession number:20114714541940
Title:Experiment on heat exchanger parameters of indirect heat transfer system by mixed ice water
Authors:Zhou, Fujun (1); Zhang, Fei (1); Zou, Chunyang (1)
Author affiliation:(1) Engineering College, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Zhou, F.(fjzhou@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:126-129
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Considering the characteristics of hot summer and cold winter in northern area, ice can be saved in winter and used in summer. The indirect heat transfer system is beneficial for reducing carbon, saving energy and protecting the environment. The parameters of heat exchanger were studied in this paper, including the efficiency of heat transfer influenced by wind speed, flow, heat pipe length, windward acreage of heat exchanger. The results showed that more 84% efficiency of heat transfer could be attained when wind speed was 2.54-2.93 m/s, flow rate was 0.72-0.80 m³/h, windward area was 11.93-13.51 dm², heat pipe length was 7.99-9.95 m. The results can be used for heat exchanger design and application in indirect heat cold exchange system of natural cold resources.
Number of references:11
Main heading:Heat transfer
Controlled terms:Heat exchangers - Heat pipes - Wind effects
Uncontrolled terms:Cold winter - Heat efficiency - Heat exchange - Heat exchanger design - Heat transfer systems - Ice water - Natural cold resources - Parameter optimization - Saving energy - Wind speed
Classification code:443.1 Atmospheric Properties - 616.1 Heat Exchange Equipment and Components - 641.2 Heat Transfer
DOI:10.3969/j.issn.1002-6819.2011.11.024
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 61>

Accession number:20114714541973
Title:Safety amount of pig manure application based on potassium balance and nitrate leaching risk on red soil
Authors:Long, Guangqiang (1); Sun, Bo (1)
Author affiliation:(1) Institute of Soil Science, Chinese Acad. of Sci., Nanjing 210008, China; (2) Graduate School of the Chinese Acad. of Sci., Beijing 100039, China
Corresponding author:Sun, B.(bsun@issas.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:300-305
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The effect of 8-year application of pig manure and lime addition on potassium balance was investigated on red soil (Udic Ferralsols) with maize monoculture in subtropical China. The content of soil available potassium, leaching and uptake of potassium were measured under different application rates of organic manure (0, 59 and 237 kg/hm² for CK, LM and HM treatment, respectively) and with lime addition (application rates of organic manure 237 kg/hm² by lime addition 1 t/(hm^2.a) for HML treatment). The results showed that continuous manure application increased the content of soil available K and K supply capacity. The K leaching did not increase with increasing manure application rate. More than 69% of potassium from manure was taken up by crop and higher utilization efficiency was found in LM which ultimately resulted in depletion of soil potassium pool. On the contrary, high manure application (HM and HML) annually replenished 48-57 kg/hm² with lower utilization efficiency. The manure application rate was 180 kg/hm² when considering only crop K demand and soil K pool balance. Considering the nitrate contamination risk, the manure application should be controlled under 155 kg/hm² with a supplement of 25 kg/hm² by chemical fertilizer.
Number of references:27
Main heading:Manures
Controlled terms:Crops - Lakes - Leaching - Lime - Potassium - Potassium fertilizers - Soils
Uncontrolled terms:Application rates - Chemical fertilizers - Lime additions - Maize monocultures - Manure applications - Nitrate contamination - Nitrate leaching - Organic manure - Pig manures - Red soils  - Safe manure amount - Subtropical China - Supply capacity - Utilization efficiency
Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 412 Concrete - 483.1 Soils and Soil Mechanics - 533.1 Ore Treatment - 549.1 Alkali Metals - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2011.11.057
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 62>

Accession number:20114714541979
Title:Zoning and mode of rural residential land consolidation based on plan orientation degree
Authors:Li, Le (1); Zhang, Fengrong (1); Guan, Xiaoke (1); Qu, Yanbo (1); Jiang, Guanghui (2)
Author affiliation:(1) Department of Land Resources Management, China Agricultural University, Beijing 100193, China; (2) College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China
Corresponding author:Zhang, F.(lile67@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:337-343
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Land use zoning not only impacts on the modes of rural residential land consolidation and development, but also guides the development and economic structure of rural residence nearby for their externality. Taking Shunyi district, Beijing as a case, this paper divided rural residential land into four classes of consolidation zones, based on the analysis of urban, industrial, transport and ecological plan orientation degree analyses and gradation, coupled with the rural residential land socioeconomic strength (high, medium and low levels). Furthermore, further consolidation modes were also advanced according to the combination of rural residential land socioeconomic strength and plan orientation degree zones. And four consolidation modes for rural residential land were generated. Finally, detailed designing and planning were discussed to realize diversified consolidation modes. The results indicated that the combination of planning externality and rural residential land consolidation could realize both farmland protection and the living, working and industrial structure improvement under the background of urban-rural integration. This study could provide new perspective and ideologies for rural residential land consolidation.
Number of references:23
Main heading:Economics
Controlled terms:Consolidation - Land use - Models - Rural areas - Zoning
Uncontrolled terms:Economic structure - Externality - Industrial structures - Land use zoning - Low level - Orientation degree - Plan orientation degree - Shunyi District - Socioeconomic strength - Urban-rural
Classification code:403 Urban and Regional Planning and Development - 483 Soil Mechanics and Foundations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 902.1 Engineering Graphics - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2011.11.063
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 63>

Accession number:20114714541977
Title:Farmland quality evaluation and site assessment in Lingyuan city
Authors:Qian, Fengkui (1); Wang, Qiubing (1); Bian, Zhenxing (1); Dong, Xiuru (1); Zheng, Liuping (1)
Author affiliation:(1) College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China
Corresponding author:Wang, Q.(fkqian@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:325-329
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The purpose of this paper is to conduct research of land evaluation and site assessment based on agricultural land classification results and promote its transformation application in land evaluation field. Taking Lingyuan city in Liaoning province as an example, making full use of agricultural land classification results, the farmland quality and site condition were evaluated separately based LESA method, and the system of farmland evaluation and site assessment was established. The results showed that the total farmland in Lingyuan city was divided into eight grades in this system, the farmland of grade 1-2 had the best natural and site conditions, the farmland of grade 3-5 had normal natural conditions, but being influenced large differently by site conditions, the farmland of grade 6-8 had poor natural conditions and bad site conditions. It is concluded that the system of land evaluation and site assessment established on the basis of results of agricultural land classification is feasible, and the selection of site factors should accords to the native condition.
Number of references:13
Main heading:Quality control
Controlled terms:Agriculture - Classification (of information) - Farms - Land use - Rating - Site selection - Surveys
Uncontrolled terms:Agricultural land - Classification results - Farmland evaluation - Land evaluation - Liaoning Province - Lingyuan city - Natural conditions - Quality evaluation - Site assessment - Site conditions
Classification code:913.3 Quality Assurance and Control - 902.2 Codes and Standards - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 716.1 Information Theory and Signal Processing - 405.3 Surveying - 403 Urban and Regional Planning and Development - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2011.11.061
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 64>

Accession number:20114714542770
Title:Image detection and classification of particle-shape mixed agricultural products
Authors:Liu, Guangrong (1); Zhou, Hong (2); Guan, Shu'an (1)
Author affiliation:(1) School of Mathematics and Computer Science, Wuhan Polytechnic University, Wuhan 430023, China; (2) School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430023, China
Corresponding author:Liu, G.(lgr981009@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:344-348
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:There are lots of kinds of particle-shape agricultural products. It happens frequently when many kinds of products are mixed together. It is an important research topics that how to detect and classify every product. The paper realized image detection and classification of rice, soybean and mungbean mixed particle-shape agricultural products by computer visual technology. Firstly, original image is binarized. Adhering particles are segregated with morphological watershed algorithm. Edge of object connected region is extracted and labeled with eight neighborhood algorithm. Finally, shape and color features of every particle are extracted. Comparing extracted parameters and standard parameters of rice and soybean and mungbean has realized image detection and classification of mixed particle-shape agricultural products. The classification accuracy of the algorithm is 95.6%, and it offers certain guidance to automatic detection application of particle-shaped agricultural products.
Number of references:16
Main heading:Image segmentation
Controlled terms:Agricultural products - Algorithms
Uncontrolled terms:Automatic Detection - Classification accuracy - Color features - Connected region - Image detection - Mungbeans - Neighborhood algorithm - Original images - Research topics - Shape features  - Water-shed algorithm
Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 821.4 Agricultural Products - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2011.11.064
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 65>

Accession number:20114714541975
Title:Optimal design for land leveling project based on digital elevation model and mathematical programming
Authors:Huang, Qi (1); Liu, Youzhao (1); Ban, Chunfeng (1); Zheng, Huawei (1)
Author affiliation:(1) College of Public Administration, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Liu, Y.(yzliu@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:313-318
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on digital elevation model(DEM) and mathematical programming, the optimal design of farmland division, earthwork calculation and transportation in land leveling project was studied. Taking Hushu land consolidation project of Jiangning county in Nanjing city as a case, a large-scale DEM was generated from digital topographic datasets and farmland was divided into land leveling regions and units, and then the land leveling units elevation, earthwork volume and the barycenter were calculated with DEM in ArcGIS9.3. Finally mathematical programming was applied for solving optimal design of elevation and earthwork transportation. Results showed that the model could reasonably calculate farmland scale, the design elevation of land leveling units and obtained the optimal earthwork transportation thematic map. The new design by the model reduced 9.37% earthwork than the original one. Results indicate that the combination methods of DEM and mathematical programming can improve calculation efficiency and precision of land leveling project, and reduce the project investment.
Number of references:19
Main heading:Mathematical programming
Controlled terms:Civil engineering - Design - Digital instruments - Economics - Excavation - Farms - Foundations - Geomorphology - Land use - Maps  - Mathematical models - Models - Optimal systems - Optimization - Surveying
Uncontrolled terms:Barycenters - Calculation efficiency - Combination method - Consolidation projects - Digital elevation model - Earthwork - Earthwork volume - Land leveling - Nanjing - New design  - Optimal design - Project-based - Topographic datasets
Classification code:971 Social Sciences - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921.5 Optimization Techniques - 921 Mathematics - 902.1 Engineering Graphics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 481.1.1 Geomorphology - 409 Civil Engineering, General - 405 Construction Equipment and Methods; Surveying - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2011.11.059
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 66>

Accession number:20114714541918
Title:Three-dimensional parametric design of backward rotary transplanting mechanism with eccentric gears and non-circular gear
Authors:Yu, Gaohong (1); Zhang, Weiwei (1); Sun, Liang (1); Zhao, Yun (1)
Author affiliation:(1) College of Mechanical Engineering and Automation, Zhejiang Sci.-Tech. University, Hangzhou 310018, China
Corresponding author:Zhao, Y.(zhaoyun@zstu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:9-14
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the design efficiency and shorten development period of transplanting mechanism, 3D parametric design system of the transplanting mechanism was built in this paper .Based on backward rotary transplanting mechanism with eccentric gears and non-circular gear, 3D Software UG6.0 was chosen as design platform and UG secondary development technology of NX Open for.NET was adopted in the system. 3D models of the parts and assembly of the transplanting mechanism, which includes 3D model of non-circular gear, can be easily created if users input the main design parameters of the transplanting mechanism by user interface of the system, and 3D parametric design of the transplanting mechanism can be realized.
Number of references:18
Main heading:Three dimensional
Controlled terms:Design - Gears - Models - User interfaces
Uncontrolled terms:3D models - Design efficiency - Design parameters - Design platform - Eccentric - Eccentric gears - Non-circular - Non-circular gears - Parametric design - Parametric design systems  - Secondary development - VB.NET
Classification code:601.2 Machine Components - 722.2 Computer Peripheral Equipment - 902.1 Engineering Graphics
DOI:10.3969/j.issn.1002-6819.2011.11.002
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 67>

Accession number:20114714541959
Title:Design and experiment of surface water-source heat pump system for greenhouse heating based on thermal balance model
Authors:Chen, Jiaoliao (1); Xu, Fang (2); Zhang, Libin (2); Yang, Jiangxin (1); Ai, Qinglin (2)
Author affiliation:(1) Institute of Manufacturing Engineering, Zhejiang University, Hangzhou 310027, China; (2) Key Laboratory of E and M, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310032, China
Corresponding author:Xu, F.(fangx@zjut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:227-231
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to decrease greenhouse energy cost in winter in Yangtze River Delta, design method of open-loop surface water source heat pump system (SWSHPS) for greenhouse heating was presented based on greenhouse heat load prediction technology. Combined various environmental factors of greenhouse with actual operation of greenhouse, thermal balance prediction model was built. Greenhouse heating loads were numerically simulated under 8 kinds of environmental conditions using Matlab/simulink and the greenhouse energy cost was calculated under the conditions of different covering materials and opening or closing thermal screen. The conclusion that when the outside air temperature was 0&deg;C, the greenhouse covered by glass coating with ATO (antimony doped tin oxide) could decrease energy consumption 23% than greenhouse covered with conventional float glass, and at night the greenhouse with the opening internal thermal screens of the roofs could reduce energy consumption 22% than the greenhouse with closing them was arrived at based on model calculation. And then the heating experiments of greenhouse were conducted in winter. The results showed that distribution of air temperature was uniform in greenhouse, temperature met the needs of greenhouse environment, and average COP (coefficient of performance) value for system in January was 2.3. Greenhouse heating design method of SWSHPS based on thermal balance prediction model is reliable.
Number of references:20
Main heading:Greenhouses
Controlled terms:Atmospheric temperature - Design - Energy utilization - Experiments - Forecasting - Glass - Heat pump systems - Heating - Mathematical models - Models  - Nanocomposites - Pumps - Surface waters - Surfaces - Tin - Tin oxides
Uncontrolled terms:Actual operation - Air temperature - Antimony-doped tin oxide - Coefficient of Performance - Covering material - Design method - Environmental conditions - Environmental factors - Float glass - Glass coating  - Greenhouse energy - Greenhouse environment - Greenhouse heating - Heat loads - Heat pumps - Heating experiment - MATLAB /simulink - Model calculations - Open loops - Outside-air temperature  - Prediction model - Surface water sources - Thermal balance - Thermal screen - Yangtze river delta
Classification code:812.3 Glass - 901.3 Engineering Research - 902.1 Engineering Graphics - 804.2 Inorganic Compounds - 921 Mathematics - 933 Solid State Physics - 951 Materials Science - 931 Classical Physics; Quantum Theory; Relativity - 761 Nanotechnology - 443.1 Atmospheric Properties - 444.1 Surface Water - 525.3 Energy Utilization - 402.1 Industrial and Agricultural Buildings - 546.2 Tin and Alloys - 641.2 Heat Transfer - 643.1 Space Heating - 618.2 Pumps
DOI:10.3969/j.issn.1002-6819.2011.11.043
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 68>

Accession number:20114714541935
Title:Simulation experiment of roots system effects on soil mechanical pressure
Authors:Song, Ziying (1); Wang, Fei (1); Hu, Lin (1); Mu, Xingmin (1); Kang, Shaozhong (3)
Author affiliation:(1) College of Resources and Environment, 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) Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, F.(wafe@ms.iswc.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:101-106
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to research effect of roots system on soil mechanical pressure values and distribution and study on relationship between factors and soil mechanical pressure, the mechanical pressure of simulation roots and its influencing factors of the pressure were measured and analyzed under various diameters in different soil layer and soil bulk density respectively with homemade pressure measuring device. The result showed that the relationship between simulation roots on soil mechanical pressure and root diameter was highly significant (p&lt;0.01) as power function, the mechanical pressure of roots on soil increased when the diameter of root increased. When the soil bulk density was the denser and the soil layer was the deeper, the mechanical pressure of roots on soil increased the more greatly. The mechanical pressure of root on soil increased when the power of wind increased. The simulation research showed that root growth could produce mechanical pressure on soil, and surface wind and other disturbance force could be passed to roots and caused the changes of this mechanical pressure. The structure and physical behavior of soil may be affected by this pressure, but the real effects need to be further test. Although simulation growth experiment was conducted with simulation roots system in this paper, it can provide guiding significance for root systems biology.
Number of references:17
Main heading:Soils
Controlled terms:Experiments - Functions - Pressure
Uncontrolled terms:Disturbance force - Influencing factor - Mechanical pressure - Physical behaviors - Power functions - Pressure measuring - Root diameters - Root growth - Root system - Simulating roots  - Simulation experiments - Simulation research - Soil bulk density - Soil layer - Surface winds - System effects
Classification code:483.1 Soils and Soil Mechanics - 901.3 Engineering Research - 921 Mathematics - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2011.11.019
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 69>

Accession number:20114714541983
Title:Quality assessment of green tea taste by using electronic tongue
Authors:Wu, Ruimei (1); Zhao, Jiewen (1); Chen, Quansheng (1); Huang, Xingyi (1)
Author affiliation:(1) School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (2) College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China
Corresponding author:Zhao, J.(zhao_jiewen@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:378-381
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Electronic tongue as a rapid analytical tool was used to assess the quality of green tea in this work. "Biluochen" green tea was studied. The total taste score value for the brewed tea infusion was attained by chemical evaluation method of green tea taste which was considered as the reference measurement. Firstly, the effects of production dates on taste quality of green tea and sensor signals of green tea infusion were analyzed using one-way analysis of variance (One-Way ANOVA). Subsequently, partial least squares and least squares support vector machines methods were contradistinctive used to establish the relationship between sensor signals and the total taste score value of tea infusion. Results showed that production dates had significant effects on green tea taste quality and sensor signals. The established least squares support vector machines model got better predictive effect with correlation coefficient of 0.906 and root mean square error of prediction of 4.077 when 4 principal components were included. This method will provide a basic for the intelligent evaluation of tea quality.
Number of references:16
Main heading:Quality control
Controlled terms:Agricultural machinery - Agricultural products - Algorithms - Electronic tongues - Least squares approximations - Mean square error - Principal component analysis - Sensors - Support vector machines
Uncontrolled terms:Analytical tool - Chemical evaluation - Correlation coefficient - Green tea - Intelligent evaluation - Least squares support vector machines - One-way anova - Partial least squares - Principal Components - Quality assessment  - Root-mean-square error of predictions - Sensor signals - Taste quality - Tea infusion
Classification code:922.2 Mathematical Statistics - 921.6 Numerical Methods - 913.3 Quality Assurance and Control - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 801 Chemistry - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2011.11.070
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 70>

Accession number:20114714541929
Title:Numerical simulation and particle image velocimetry for gas-liquid two-phase flow in hydraulic couplings
Authors:Fan, Lidan (1); Ma, Wenxing (2); Chai, Bosen (2); Lu, Xiuquan (2)
Author affiliation:(1) State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China; (2) College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China; (3) College of Mechanical Engineering, Jilin Teachers' Institute of Engineering and Technology, Changchun 130052, China
Corresponding author:Ma, W.(mawx@jlu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:66-70
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to more truly react the mechanism of gas-liquid two-phase flow in fluid couplings, the method of CFD(computational fluid dynamics) simulation was used to numerically simulate flow field characteristics in fluid couplings, such as internal flow velocity, pressure and so on, and the technology of PIV(particle image velocimetry) was adopted to test flow field in fluid couplings. The results showed that bubbles in the pump wheel were small and uniform, velocity distribution of pump was regular and increased from inner loop to outer loop; the bubbles in the turbine were more obvious, the turbine came out irregular flow phenomena of vortex, reflux, secondary flow and so on. Flow trend of PIV test and numerical simulation were nearly same. The numerical simulation method of CFD and PIV technology provides effective method to reveal complex flow of the internal flow field characteristics in the hydraulic coupling.
Number of references:15
Main heading:Computational fluid dynamics
Controlled terms:Computer simulation - Couplings - Dynamics - Flow fields - Flow visualization - Hydraulic motors - Liquids - Mathematical models - Numerical methods - Turbines  - Two phase flow - Velocimeters - Velocity measurement
Uncontrolled terms:CFD (computational fluid dynamics) - Complex flow - Flow field characteristics - Flow Phenomena - Fluid couplings - Gas-liquid two-phase flow - Hydraulic coupling - Inner loops - Internal flow field - Internal flows  - Numerical simulation method - Outer loop - Particle image velocimetries - PIV test
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 921.6 Numerical Methods - 921 Mathematics - 943.3 Special Purpose Instruments - 723.5 Computer Applications - 631.1 Fluid Flow, General - 612.3 Gas Turbines and Engines - 602 Mechanical Drives and Transmissions - 632.2 Hydraulic Equipment and Machinery
DOI:10.3969/j.issn.1002-6819.2011.11.013
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 71>

Accession number:20114714541924
Title:Experiments and technology improvement on reducing trash content of whole stalk sugarcane harvester
Authors:Xiao, Hongru (1); Wang, Mingyou (1); Song, Weidong (1); Li, Xianwang (1); Liu, Ping (1); Qin, Guangming (1)
Author affiliation:(1) Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
Corresponding author:Wang, M.(wmyss@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:42-45
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 reduce the trash content of the whole stalk sugarcane harvester, to meet the sugar-refinery requirements of sugar mill, the equipment of the header, equipment of cleaning element, equipment of severed tail in SJ-1600 whole stalk sugarcane harvester was improved and sugarcane-leaves separation devices was added at its tail in this article. The prototype has been machined based on technical improvement and the contrast test was conducted in the field. The results showed that when the speed of delivery wheel was 280 r/min and the speed of cleaning wheel was 750280 r/min, the effect of cleaning was the best; trash content of SJ-1600 whole stalk sugarcane harvester after improving was 4.0%, and that decreased 3.2% than before improving, and it could meet sugar-refinery requirements for sugarcane. It can provide reference for the mechanical design of the whole stalk sugarcane harvester.
Number of references:15
Main heading:Sugars
Controlled terms:Cleaning - Harvesters - Inclusions - Refining - Sugar cane - Sugar factories - Wheels
Uncontrolled terms:Mechanical design - Separation devices - Sugar mills - Technical improvement - Technology improvement - Trash content
Classification code:951 Materials Science - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 804.1 Organic Compounds - 802.3 Chemical Operations - 601.2 Machine Components - 402.1 Industrial and Agricultural Buildings
DOI:10.3969/j.issn.1002-6819.2011.11.008
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

<RECORD 72>

Accession number:20114714541964
Title:Performance of compartmentalized anaerobic reactor
Authors:Ji, Junyuan (1); Zheng, Ping (1); Zhang, Jiqiang (1); Lu, Huifeng (1)
Author affiliation:(1) Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
Corresponding author:Ji, J.(tenfei_945@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:11
Issue date:November 2011
Publication year:2011
Pages:252-256
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 exploit high-efficiency anaerobic reactors, the performance of compartmentalized anaerobic reactor (CAR) was investigated in lab-scale. The results showed that CAR could reach a high volumetric efficiency. The organic loading rate(OLR), volumetric chemical oxygen demand removal rate and volumetric biogas production were 110.97 g/(L&middotd), 84.35 g /(L&middotd) and 57.00 L/(L&middotd), respectively. The concentrations of chemical oxygen demand(COD) and volatile fatty acids (VFA) during high-loading were 18.49 and 37.52 times as high as their counterparts during common-loading stage, which provided a greater driving force for the anaerobic reaction. The working performances were good when CAR was away from the OLR saturability, but they became unstable when CAR approached to the OLR saturability.
Number of references:14
Main heading:Volatile fatty acids
Controlled terms:Anaerobic digestion - Biogas - Chemical oxygen demand - Equipment - Loading - Oxygen - Wastewater - Wastewater treatment
Uncontrolled terms:Anaerobic reactions - Anaerobic reactor - Biogas production - Chemical oxygen demand removals - Driving forces - High organic loading - Organic loading rates - Performance - Volumetric efficiency
Classification code:901 Engineering Profession - 804.1 Organic Compounds - 804 Chemical Products Generally - 672 Naval Vessels - 522 Gas Fuels - 452.4 Industrial Wastes Treatment and Disposal - 452.3 Industrial Wastes
DOI:10.3969/j.issn.1002-6819.2011.11.048
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.