Accession number:20115014603004
Title:Detection of germination rate of tomato seeds by electronic nose
Authors:Cheng, Shaoming (1); Wang, Jun (1); Ma, Yanghui (2); Wang, Yongwei (1); Wei, Zhenbo (1)
Author affiliation:(1) College of Bio-systems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; (2) College of Information, Zhejiang University of Science and Technology, Hangzhou 310023, China
Corresponding author:Wang, J.(jwang@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:132-135
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to find out a fast nondestructive examination method for germination rate of tomato seeds, different samples of tomato seeds with six kinds of germination rates were analyzed by electronic nose, and which were classified through principal component analysis (PCA) and linear discrimination analysis (LDA). The result shows that the electronic nose could distinguish the tomato seeds with germination rate of 90%, 80%, 50%-70%and un-germination seeds. However, samples with germination rate of 50%-70% were overlapped. Based on PCA and LDA, BP neural network (BPNN) and support vector machine (SVM) were introduced in the classification. The results showed that the recognition rates for germination rate of tomato seeds by the two methods reached to 93.6% and 97.4% respectively with training set, and 65.2% and 72.7% respectively with forecast set. Compared to BPNN, SVM method has less predicting errors, which has better forecasting performance.
Number of references:14
Main heading:Principal component analysis
Controlled terms:Artificial organs - Cultivation - Forecasting - Fruits - Neural networks - Nondestructive examination - Seed - Support vector machines
Uncontrolled terms:Electronic NOSE - Non destructive - Principal Components - SVM - Tomato seed
Classification code:922.2 Mathematical Statistics - 821.4 Agricultural Products - 821.3 Agricultural Methods - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 462.4 Prosthetics - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2011.12.025
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602980
Title:Identification and classification of risk factors of regional grain security based on fault tree analysis
Authors:Qi, Xiaoxing (1); Liu, Liming (1); Liu, Yabin (1); Wang, Li (1)
Author affiliation:(1) College of Resources and Environment, 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:12
Issue date:December 2011
Publication year:2011
Pages:1-6
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Regional food security is the basis of national general food security. In this paper, risk factors of food supply and demand in China were qualitatively identified by using fault tree method, and after that the identification indexes system of risk factors of food security was established. Based on the qualitative identification, was risk coefficient method to quantitatively identify risk factors of regional food security was. Meanwhile, a case study was carried out in Dongting Lake area in Hunan Province, and the risk factors were classified according to their different risk sources. The results showed that: natural disasters, farmland resource constraints, water constraints, labor shortage, input cost constraints of fertilizers and pesticides, food consumption changes per capita, income changes, population change were the risk factors of food security in Dongting Lake area. The result can provide strong and relevant evidence for regional policy makers. Based on the results, risk assessment for food security also can be carried out.
Number of references:25
Main heading:Risk assessment
Controlled terms:Chemical contamination - Disasters - Economics - Fault tree analysis - Food supply - Forestry - Identification (control systems) - Lakes
Uncontrolled terms:Classification of risk - Dongting Lake area - Fault tree method - Food consumption - Food security - General foods - Grain security - Hunan province - Indexes system - Input costs - Labor shortages - Natural disasters - Per capita - Population change - Qualitative identification - Regional policies - Resource Constraint - Risk coefficient - Risk factors - Risk sources - Supply and demand
Classification code:971 Social Sciences - 922.1 Probability Theory - 921 Mathematics - 822.3 Food Products - 821.0 Woodlands and Forestry - 731.1 Control Systems - 484 Seismology - 421 Strength of Building Materials; Mechanical Properties - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2011.12.001
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603005
Title:Highspectral prediction of early blight in processing tomato based on Gram-Schmidt algorithm and GRNN
Authors:Yin, Xiaojun (1); Li, Manchun (2); Zhao, Sifeng (3); Wang, Dengwei (3)
Author affiliation:(1) College of Geography and Ocean, Nanjing University, Nanjing, 210093, China; (2) College of Information Science and Technology, Shihezi University, Shihezi, 823000, China; (3) College of Agriculture, Shihezi University, Shihezi, 823000, China
Corresponding author:Li, M.(limanchun@nju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:136-140
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Accurate prediction of early blight in processing tomato is good for taking active prevention measures and reducing loss of production. The canopy spectrum of early blight in processing tomato was measured, and continuum removal and transformation were conducted over 380-760 nm to get characteristic parameters of band depth, band position, band width, slope and area, and to extract characteristic parameters of red valley, green peaks, red edge and corresponding band position from original spectrum. Then the components were extracted from characteristic parameters by Gram-Schmidt algorithm, and the components were taken as input variable of General Regression Nerve Net (GRNN) to predict severity of early blight in processing tomato. The results show that compared with multiple linear regression prediction mode and prediction mode of partial least squares method, combined model of Gram-Schmidt algorithm and GRNN is more precise with R2 of 0.843 and RMSE of 0.136, which indicates that the model can rapidly and accurately predict the severity of early blight in processing tomato.
Number of references:19
Main heading:Forecasting
Controlled terms:Algorithms - Fruits - Least squares approximations - Linear regression - Spectrum analysis
Uncontrolled terms:Accurate prediction - Band position - Canopy spectrum - Characteristic parameter - Combined model - Continuum removal - Early blight - Gram-Schmidt algorithms - GRNN - Input variables - Multiple linear regressions - Partial least-squares method - Prediction modes - Prevention measures - Red edge
Classification code:723 Computer Software, Data Handling and Applications - 821.4 Agricultural Products - 921 Mathematics - 921.6 Numerical Methods - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2011.12.026
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603011
Title:Convergence criterion for distribution systems reliability assessment based on sequential simulation
Authors:Huang, Lihua (1); Zhang, Lina (2); Huo, Limin (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Hebei Agricultural University, Baoding 071001, China; (2) College of Science, Hebei Agricultural University, Baoding 071001, China; (3) Hebei Branch of China Huaneng Group, Shijiazhuang 050051, China
Corresponding author:Huo, L.(huolimin@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:168-172
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In sequential simulation for distribution system reliability assessment, randomicity of sampling result in uncertainty of solution, thus the solving process must be expressed by probability knowledge, the convergence criterion for reliability indices is also different from which of common numerical iteration algorithm. Directed against solving uncertainty problems for sequential simulation of distribution system, choosing independent events was studied, independent generalized events were constituted. By analyzing confidence interval of general average value on the condition of a given confidence probability, a conclusion was reached that confidence interval length is related to absolute error of sample mean, and then a practical convergence criterion that expressed with absolute error was proposed, and the unequal relational expression about confidence interval length and a given calculation precision was presented under the given confidence probability. The method is reasonable and effective by RTBS verification.
Number of references:20
Main heading:Reliability analysis
Controlled terms:Algorithms - Computer simulation - Convergence of numerical methods - Local area networks - Probability distributions - Sequential circuits
Uncontrolled terms:Absolute error - Average values - Calculation precision - Confidence interval - Confidence probability - Convergence criterion - Distribution network - Distribution system reliability - Distribution systems - Numerical iteration - Randomicity - Reliability assessments - Reliability Index - Sample means - Sampling results - Sequential simulation - Simulation - Uncertainty problems
Classification code:921.6 Numerical Methods - 921 Mathematics - 913 Production Planning and Control; Manufacturing - 723.5 Computer Applications - 922.1 Probability Theory - 723 Computer Software, Data Handling and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
DOI:10.3969/j.issn.1002-6819.2011.12.032
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602982
Title:Optimization design of sliding cutting edge curve of corn rootstalk cutting tool
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 130022, 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:12
Issue date:December 2011
Publication year:2011
Pages:13-17
Language: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 cutting performance of blades, a study was made on the cutting process of corn rootstalk. By the use of theoretical analysis and cutting test experiment, the cutting dynamic model and energy consumption model were established, and the relationship between optimized sliding-cutting angle and friction angle was revealed. According to the friction properties of corn rootstalk, corn rootstalk profile was divided into 5 region, the friction coefficients of every region was measured, and the optimized sliding-cutting angles of every 5 region was determined. At last, the blade with multilevel sliding cutting angle was designed, and compared with the traditional blades with fixed sliding cutting angle. The cutting test result showed that cutting energy consumption of blade with multilevel sliding cutting angle was the lowest, which was 14.2 J.
Number of references:15
Main heading:Cutting tools
Controlled terms:Curve fitting - Cutting equipment - Design - Energy utilization - Friction - Optimization - Tribology
Uncontrolled terms:Corn stubble - Cutting angles - Cutting dynamics - Cutting edge - Cutting energy - Cutting performance - Cutting process - Cutting test - Cutting-edge curve - Energy consumption model - Friction angles - Friction coefficients - Friction properties - Optimization design - Sliding cutting angle
Classification code:931.1 Mechanics - 931 Classical Physics; Quantum Theory; Relativity - 921 Mathematics - 605 Small Tools and Hardware - 604.1 Metal Cutting - 525.3 Energy Utilization - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2011.12.003
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603037
Title:Method and application of impact assessment of land consolidation project
Authors:Zhang, Zhengfeng (1); Yang, Hong (2); Gu, Xiaokun (3)
Author affiliation:(1) School of Public Administration, Renmin University of China, Beijing 100872, China; (2) China Land Consolidation and Rehabilitation, Beijing 100035, China; (3) College of Tourism and City Management, Zhejiang Gongshang University, Hangzhou 310018, China
Corresponding author:Zhang, Z.(zhengfengzh@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:313-317
Language: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 China, land consolidation projects are often associated with government-funded engineering works which have wide and profound impacts on the region ecosystem and socioeconomic system. Analysis of the changes caused by land consolidation projects and theirs impacts could improve the methodological principles underlying land consolidation, and also support the decision-making processes of the land consolidation authorities. In this paper, a land consolidation project (LCP) in Tianmen city of Hubei province in central China was evaluated by the GIS techniques, comprehensive index model and ecosystem service value evaluation methods, focusing on the changes of the plot size and shape, the density and connectivity of field-roads and irrigation systems, the area of cropland and the land use type before and after the application of LCP. The LCP showed both positive and negative effects on the region ecosystem and socioeconomic system in the study area. The value of agricultural productivity index was increased from 41.06 to 76.86. The tillage time was decreased from 65 min/hm2 to 50 min/hm2, with a decrease rate of 23.08%. The numbers of plots per household was decreased from 2.69 to 1.25, which reducing the moving time of farmers between plots. Moreover, the total value of ecosystem services in the study area was decreased from 12.26 × 106 Yuan to 11.62 × 106 Yuan annually with a decrease of 0.64 million Yuan, due to the decreased area of ponds and unused lands.
Number of references:10
Main heading:Ecosystems
Controlled terms:Agriculture - Consolidation - Economics - Land use - Productivity
Uncontrolled terms:Agricultural productivity - Consolidation projects - Decision making process - Decrease rate - Ecosystem services - Engineering works - Evaluation Method - Hubei Province - Impact assessments - Index models - Irrigation systems - Land - Land use type - Positive and negative effect - Services value - Size and shape - Socio-economic systems - Study areas - Total values
Classification code:403 Urban and Regional Planning and Development - 454.3 Ecology and Ecosystems - 483 Soil Mechanics and Foundations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.1 Production Engineering - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2011.12.059
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603042
Title:Characterization of aggregate microstructure of paddy soils cultivated for different years with synchrotron based micro-CT
Authors:Zhou, Hu (1); Peng, Xinhua (1); Zhang, Zhongbin (1); Wang, Liangliang (1); Xiao, Tiqiao (2); Peng, Guanyun (2)
Author affiliation:(1) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; (2) Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
Corresponding author:Peng, X.(xhpeng@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:12
Issue date:December 2011
Publication year:2011
Pages:343-347
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Synchrotron based X-ray micro-computed tomography (SRμ-CT) can nondestructively capture images of the interior structure with high resolution and strong contrast, and is therefore an excellent tool to investigate the 3-D microstructure of soil aggregates. Aggregates with diameters around 5 mm were collected from paddy soils with rice cultivation for 20 and 40 years, respectively, and the aggregates were scanned with SRμ-CT at a resolution of 9 μm. Aggregate microstructure was visualized and quantified using digital image analysis method and 3DMA-Rock software. Results showed the SOM and total nitrogen content significantly increased after 40 years of rice cultivation compared with 20 years of rice cultivation. The number of pores, porosity, and the specific surface area of soil aggregate significantly increased with the increase of cultivation years. Aggregates of paddy soil with 20 years rice cultivation had a dense massive microstructure with few connected pores, while the aggregate with 40 years rise had a more heterogeneous porous microstructure. The results indicated significant improvement of aggregate microstructure and soil quality with the increase of rice cultivation years.
Number of references:20
Main heading:Computerized tomography
Controlled terms:Agglomeration - Aggregates - Microstructure - Soils - Synchrotrons - Three dimensional - Tomography
Uncontrolled terms:Capture images - Digital image analysis - High resolution - Interior structure - Micro CT - Paddy soils - Pore - Porous microstructure - Rice cultivation - Soil aggregate - Soil quality - Strong contrast - Total nitrogen content - X ray micro-computed tomography
Classification code:933 Solid State Physics - 932.1.1 Particle Accelerators - 902.1 Engineering Graphics - 802.3 Chemical Operations - 951 Materials Science - 801 Chemistry - 531 Metallurgy and Metallography - 483.1 Soils and Soil Mechanics - 406 Highway Engineering - 746 Imaging Techniques
DOI:10.3969/j.issn.1002-6819.2011.12.064
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603046
Title:Detection of different variety and processing type of Citrus juices using electronic nose
Authors:Qiao, Yu (1); Pan, Siyi (2); Xu, Xiaoyun (2); Fan, Gang (2); Ma, Minghui (3); Liao, Li (1); Wang, Lan (1); Wang, Jun (1); Du, Xin (1); Cheng, Wei (1); Wang, Shaohua (1); Xiong, Guangquan (1)
Author affiliation:(1) Agricultural Products Processing Subcenter of Hubei Agricultural Sci. and Technol. Innovation Center, Research Institute of Agricultural Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (2) College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (3) Alpha M.O.S., Asia Pacific, Shanghai 200336, China
Corresponding author:Pan, S.(pansiyi@mail.hzau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:364-368
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the method that fast distinguishes the aroma of orange juice and mandarin juice and monitor the quality during process, the electronic nose was applied to discriminate the overall aroma of orange juice and mandarin juice. The effect of aroma on different process during sour orange juice processing and discrimination of different processing type were also studied. The acquired data were analyzed by principal component analysis (PCA) and discriminate factor analysis (DFA). The results indicated that the aroma quality of orange juice and mandarin juice from different variety present diversity. Meanwhile, the aroma had taken place significant changes after processing. The aroma of reconstituted orange juice was weaker than NFC (not from concentrated) juice. The electronic nose sensor signal of 4 kinds of reconstituted juice with different soluble solids (28%, 38%, 48%, 63.5%) existed linear relationship. The 55% reconstituted juice was chosen as unknown sample to discriminate the concentration. The discriminate result was 57.95% with 5% RSD. The electronic nose could be used in the detection of the citrus juices from different varieties and processing type, also monitor the orange juice process.
Number of references:15
Main heading:Principal component analysis
Controlled terms:Artificial organs - Fruit juices - Nondestructive examination - Quality control - Sensors
Uncontrolled terms:Citrus juices - Electronic NOSE - Non destructive - Partial least squares - Principal Components
Classification code:421 Strength of Building Materials; Mechanical Properties - 462.4 Prosthetics - 801 Chemistry - 822.3 Food Products - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2011.12.068
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603020
Title:Effect of temperature and organic loading rates on anaerobic digestion of pig manure
Authors:Guo, Jianbin (1); Dong, Renjie (2); Cheng, Huicai (2); Clemens, Joachim (4); Pang, Changle (2)
Author affiliation:(1) College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) College of Engineering, China Agricultural University, Beijing 100083, China; (3) Institute of Biology, Hebei Academy of Sciences, Shijiazhuang 050081, China; (4) Bonn University, Bonn 53115, Germany
Corresponding author:Pang, C.(pangcl@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:12
Issue date:December 2011
Publication year:2011
Pages:217-222
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Many of the biogas plants in China run at the lower range of mesophilic conditions and low organic loading rates. The objective of this study was to evaluate the performance (methane yield, production of volatile fatty acid (VFA) and total inorganic carbon (TIC)) of completely stirred tank reactor which was fed with pig manure semi-continuously at different temperature (20, 28, 38°C) and organic loading rates (0.3-4.3 kg/(m3·d)). The results showed that the start-up phase last for a long time at 20°C with low methane yield at organic loading rate (OLR) of 0.3 kg/(m3·d) and pH was kept stable with additional NaHCO
Number of references:20
Main heading:Anaerobic digestion
Controlled terms:Biogas - Fertilizers - Loading - Manures - Methane - Temperature - Volatile fatty acids
Uncontrolled terms:Biogas plants - Completely stirred tank reactors - Effect of temperature - Energy inputs - Loads - Mesophilic condition - Methane Yield - Operation temperature - Organic loading rates - Pig manures - Start-ups - Total inorganic carbon
Classification code:804.1 Organic Compounds - 804 Chemical Products Generally - 672 Naval Vessels - 641.1 Thermodynamics - 522 Gas Fuels - 452.4 Industrial Wastes Treatment and Disposal - 452.3 Industrial Wastes
DOI:10.3969/j.issn.1002-6819.2011.12.041
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603034
Title:Thermodynamics and experimental study of alcohol prepared by synthesis gas
Authors:Yuan, Haoran (1); Chen, Xinde (1); Chen, Yong (2); Ma, Longlong (1); Noriyuki, Kobayashi (3); Huang, Hongyu (3)
Author affiliation:(1) Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; (2) Guangzhou division Academy, Chinese Academy of Sciences, Guangzhou 510640, China; (3) Japan Nagoya University EcoTopia Science Institute, Nagoya, 464-8603, Japan
Corresponding author:Yuan, H.(yuanhr@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:12
Issue date:December 2011
Publication year:2011
Pages:297-301
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To solve the problems of liquid fuel laced and agricultural waste disposal, first C
Number of references:15
Main heading:Waste disposal
Controlled terms:Agricultural wastes - Catalysts - Equilibrium constants - Gas fuel analysis - Optimization - Synthesis gas - Thermoanalysis - Thermodynamics
Uncontrolled terms:CO conversion - Experimental data - Experimental studies - In-line - Molar ratio - Optimum conditions - Reducing temperature - Syn-gas - Thermo dynamic analysis
Classification code:821.5 Agricultural Wastes - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 921.5 Optimization Techniques - 801 Chemistry - 522 Gas Fuels - 452.4 Industrial Wastes Treatment and Disposal - 641.1 Thermodynamics
DOI:10.3969/j.issn.1002-6819.2011.12.056
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603032
Title:Theoretic prediction and verification of heat release time for paraffin phase change heat storage tubes
Authors:He, Zhengbin (1); Gan, Xuefei (1); Yang, Jie (1); Yi, Songlin (1)
Author affiliation:(1) College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China
Corresponding author:Yi, S.(ysonglin@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:286-290
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Drying materials is an energy consumed process, which sometimes brings pollution to environment, therefore, it is necessary to use solar energy for material drying, which is clean and low cost. However, solar energy is intermittent, this makes heat storage materials involved in solar drying. Paraffin was taken as the phase change material in this paper to study the characters of paraffin units during drying process, the results showed that there was temperature difference between outside and inner paraffin tube. The wall temperature, which related to the air velocity, decreased more quickly along with the increase of air speed. Through simulating the heat transferring inner paraffin tubes, the theoretic expression of paraffin solidification radius (r
Number of references:23
Main heading:Storage (materials)
Controlled terms:Drying - Heat storage - Paraffin waxes - Paraffins - Phase change materials - Solar dryers - Solar energy - Solidification - Storage tubes - Tubes (components)
Uncontrolled terms:Air speed - Air velocities - Drying materials - Drying process - Heat release - Heat storage materials - Low costs - Phase Change - Solar drying - Temperature differences - Theoretic value - Wall temperatures
Classification code:933 Solid State Physics - 804.1 Organic Compounds - 802.1 Chemical Plants and Equipment - 714.1 Electron Tubes - 694.4 Storage - 642.1 Process Heating - 641.2 Heat Transfer - 616.1 Heat Exchange Equipment and Components - 616 Heat Exchangers - 615.2 Solar Power - 615 Thermoelectric, Magnetohydrodynamic and Other Power Generators
DOI:10.3969/j.issn.1002-6819.2011.12.054
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602989
Title:Optimization design of water distribution unit in UBF reactor used in livestock farm
Authors:Yuan, Zhide (1); Gao, Lihong (2); Ye, Jin (1); Liu, Jian (1)
Author affiliation:(1) College of Engineering and Technology, Southwest University, Chongqing 400715, China; (2) Chongqing Academy of Agricultural Sciences, Institute of Agricultural Engineering, Chongqing 401329, China
Corresponding author:Ye, J.(yejin@swu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:47-51
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to resolve the problem of uneven water distribution, which was the main defect of UBF-SBR process in wastewater treatment used in a large-scale pig farm in Chongqing Hechuan, the operating characteristics of water distribution unit were studied with FLUENT software. Water distribution unit was one of the most critical units in UBF reactor. After simulation and optimization, a new water distribution unit was designed, which had a simple structure and was easy to be manufactured. Before the optimization, there were significant differences of velocities of flow among all outlets in water distribution unit. The maximum velocity was 4.1 faster than the minimum velocity. Through the optimization, however, the velocity differences were greatly reduced. The maximum velocity was only 0.6 faster than the minimum velocity. Practice has proved that the efficiency of wastewater treatment of UBF reactor has been enhanced obviously.
Number of references:15
Main heading:Water supply systems
Controlled terms:Agriculture - Computer software - Design - Equipment - Optimization - Reclamation - Velocity - Wastewater - Wastewater treatment
Uncontrolled terms:Chongqing - Critical units - FLUENT software - Maximum velocity - Operating characteristics - Optimization design - Simple structures - Simulation and optimization - UBF-SBR progress - Velocity difference - Water distributions
Classification code:931.1 Mechanics - 921.5 Optimization Techniques - 901 Engineering Profession - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723 Computer Software, Data Handling and Applications - 452.4 Industrial Wastes Treatment and Disposal - 452.3 Industrial Wastes - 446.1 Water Supply Systems - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2011.12.010
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603000
Title:Spatial variability and relationship of spectral reflectance and growth status to corn canopy
Authors:Li, Shuqiang (1); Li, Minzan (1); Li, Xiuhua (1); Zhao, Ruijiao (1); Zhang, Yane (1)
Author affiliation:(1) Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing 100083, China; (2) College of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China
Corresponding author:Li, M.(limz@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:12
Issue date:December 2011
Publication year:2011
Pages:110-114
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to find out a convenient way of acquiring chlorophyll spatial distribution, the canopy spectral reflectance of corn seedlings was measured. The spatial distribution of canopy spectral reflectance and the chlorophyll content were analyzed on different growth stages. The results indicated that the spatial variability of the canopy chlorophyll content of corn was unstable at different growth stages. The variance was kept in a higher level over the growth stages. The correlation coefficients between chlorophyll content of corn canopy leaf and each vegetation index, NDVI, RVI, and spectral reflectance of 550 nm, were calculated. The chlorophyll content showed better correlation with NDVI and reflectance of 550 nm, while there was no high correlation between chlorophyll content and RVI. Focus on the relationship between reflectance of 550 nm and chlorophyll content, it was found that the correlation coefficient varied among -0.88~-0.69, and the highest value was observed at the early period of the five-leaf stage. It showed that the reflectance at 550 nm might characterize the chlorophyll content of corn canopy leaves. The method can be used to support the precision fertilization during the growth stages of corn.
Number of references:13
Main heading:Chlorophyll
Controlled terms:Forestry - Global positioning system - Reflection - Spatial distribution - Spectrum analysis
Uncontrolled terms:Canopy chlorophyll - Canopy spectral reflectance - Chlorophyll contents - Corn canopy - Correlation coefficient - Growth stages - Precision fertilization - Spatial variability - Spectral reflectances - Vegetation index
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943.3 Special Purpose Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 821.0 Woodlands and Forestry - 804.1 Organic Compounds - 711 Electromagnetic Waves
DOI:10.3969/j.issn.1002-6819.2011.12.021
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603008
Title:Experiment on killing and controlling cucumber pests by high voltage static electricity
Authors:Zhu, Lin (1); Xue, Shaoping (1); Yan, Qinlao (1); Chen, Jun (1); Yang, Zhonghao (2)
Author affiliation:(1) Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Runhao Plant Protection Technology Co., Wuhan 430001, China
Corresponding author:Zhu, L.(zhulin@nwsuaf.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:152-155
Language: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 pollution of crop and environment caused by pesticides, and seek for physical method to prevent and control pests, based on the principle of killing pests by high static electricity, a kind of pest-killing equipment using high voltage direct current circuit was designed, and an effective deinsectation voltage was identified. Field experiment on killing pests on the cucumber plant leaves was carried out. The experimental results showed that high voltage static electricity method can be used to kill pests and the deinsectation rate for cucumber louse pests was up to 63.6%-70.4%, and 20.99%-26.27% for the other pests. This research can provide a reference for developing equipment for pest prevention and control by using physical method.
Number of references:13
Main heading:Pest control
Controlled terms:Experiments - Pollution control - Static electricity
Uncontrolled terms:Cucumber louse - Cucumber plants - Field experiment - High voltage - High voltage direct current - Physical methods - Snout moth's larva
Classification code:454.2 Environmental Impact and Protection - 701.1 Electricity: Basic Concepts and Phenomena - 803 Chemical Agents and Basic Industrial Chemicals - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2011.12.029
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603009
Title:Measurement of characteristic acoustic impedance and concentration of high attenuation fluid using multiple reflected ultrasound echoes
Authors:Meng, Ruifeng (1); Liu, Zhenfeng (1); Zhong, Jianjun (1); Zhang, Lifen (1); Ye, Xingqian (1); Liu, Donghong (1)
Author affiliation:(1) School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
Corresponding author:Liu, D.(dhliu@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:12
Issue date:December 2011
Publication year:2011
Pages:156-160
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Using multiple reflected echoes caused by the difference impedance of the solid-liquid interface, an ultrasonic system for measuring characteristic acoustic impedance of liquids was developed. The characteristic acoustic impedance of four materials were measured, such as methanol, ethanol, water and glycerol. Results indicated that the larger the liquid's characteristic acoustic impedance value, the more accurate the system. Also, the impedance of CaCl
Number of references:19
Main heading:Acoustic impedance
Controlled terms:Calcium chloride - Concentration (process) - Ethanol - Glycerol - Liquids - Methanol - Phase interfaces - Reflection - Ultrasonic measurement - Ultrasonics
Uncontrolled terms:Characteristic acoustic impedance - Concentration measurement - Measurement system - Reflection coefficients - Solid-liquid interfaces - Ultrasonic system - Ultrasound echo
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 804.2 Inorganic Compounds - 804.1 Organic Compounds - 802.3 Chemical Operations - 753.1 Ultrasonic Waves - 751.2 Acoustic Properties of Materials - 711 Electromagnetic Waves
DOI:10.3969/j.issn.1002-6819.2011.12.030
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602991
Title:Simulation on stable conditions of double clutch hybrid power system
Authors:He, Jianhui (1); Yang, Lin (1)
Author affiliation:(1) School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author:He, J.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:57-63
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For solving the problem that the ISG single-axis parallel hybrid energy recovery system is low efficiency, a structure with double-clutch and high power electric motor was designed. According to the theoretical of vehicle dynamics, the power demand in driving cycle for typical cities in China was calculated. Base on the stable conditions, simulation of the power and transmission conditions of the new power system was carried out, test results showed that the power and economy could achieved state switching process without torque ripple, and the smoothness of power delivery was improved, the time of transition conditions was shorten (reduced from 8 s to 4 s), fuel economy and emission performance also were improved.
Number of references:18
Main heading:Electric power transmission
Controlled terms:Clutches - Computer simulation - Dynamics - Fuel economy - Power transmission
Uncontrolled terms:Driving cycle - Emission performance - High-power - Hybrid - Hybrid energy - Hybrid power systems - Power delivery - Power demands - Single-axis - Stable conditions - State switching - Time of transitions - Torque ripples - Transmission conditions - Vehicle dynamics
Classification code:521 Fuel Combustion and Flame Research - 602.2 Mechanical Transmissions - 706.1.1 Electric Power Transmission - 723.5 Computer Applications - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2011.12.012
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603050
Title:Effects of different drying methods on solubility of whole egg powder
Authors:Liu, Jingbo (1); Ma, Shuang (1); Liu, Boqun (1); Yang, Xu (1); Zhang, Yan (1); Wang, Erlei (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:12
Issue date:December 2011
Publication year:2011
Pages:383-388
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To improve the quality and solubility of whole egg powder, the effect of five different drying methods (heated-air drying, vacuum freeze drying, microwave drying, spray-drying, far-infrared drying) on nutrition constituent and key evaluation indexes about solubility such as wetting sinking time, hydratability, coefficient of solubility, agglomerate rate and stability were evaluated. The results indicated that whole egg powder made by spray-drying has the highest nutrition retention rate and the best solubility, wetting sinking time was 198.24 s, hydratability was 4.8516 mL/g, coefficient of solubility was 1.8525 (revolving speed:140 r/min), agglomerate rate was 18.08%, and coefficient of stability was 81.91%. Egg powder particles presented as spongy porous structure and its condition most likely to be original status. The quality and solubility of whole egg powder by vacuum freeze drying was inferior to that of made by spray-drying, and then the whole egg powder made by far-infrared drying and microwave drying. The whole egg powder made by heated-air drying has the lowest nutrition retention rate, the worst solubility, obviously shrinkage and agglomeration. Overall, it could be found that whole egg powder made by spray-drying has the best quality. This could provide a theory basis for producing instant whole egg powder.
Number of references:13
Main heading:Infrared drying
Controlled terms:Agglomeration - Drying - Microwave heating - Nutrition - Quality control - Solubility - Thermal processing (foods) - Vacuum - Wetting
Uncontrolled terms:Coefficient of solubility - Coefficient of stability - Drying methods - Evaluation index - Far-infrared - Microwave drying - Porous structures - Powder particles - Retention rate - Ultra structure - Vacuum-freeze drying
Classification code:913.3 Quality Assurance and Control - 822.3 Food Products - 822.2 Food Processing Operations - 802.3 Chemical Operations - 801.4 Physical Chemistry - 711.1 Electromagnetic Waves in Different Media - 633 Vacuum Technology
DOI:10.3969/j.issn.1002-6819.2011.12.072
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603030
Title:Effect of microwave pretreatment on component fractionation and saccharification of corn stalk
Authors:Zou, An (1); Shen, Chunyin (1); Zhao, Ling (1); Dai, Gance (1)
Author affiliation:(1) State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Corresponding author:Shen, C.(ichuny@ecust.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:269-274
Language: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 realize component fractionation in corn stalk, a two-stage microwave pretreatment method, which includes microwave-alkali pretreatment for hemicelluloses extraction and microwave-glycerine pretreatment for lignin extraction, was studied in a special microwave reactor. The effects of particle size, liquid-to-solid ratio, alkali and glycerine consumption, processing time and microwave power on extraction were investigated respectively. The performance of enzymatic hydrolysis saccharification of microwave pretreated corn stalk was studied also. The results showed that the liquid-to-solid ratio 20 mL/g, alkali consumption 150%wt, treatment time 10 min, microwave power 116.7 w/g and the particle size 40-80 mesh were appropriate parameters for hemicelluloses extraction with microwave-alkali pretreatment; while the liquid-to-solid ratio 20 mL/g, pure glycerine as solvent, treatment time 30 min, and microwave power 66.7 w/g were found to be optimal for lignin extraction with microwave-glycerine pretreatment. Consequently the extraction products of 2.48 g hemicelluloses, 0.95 g lignin and 3.55 g reducing sugars were obtained from every 10 g corn stalk in terms of the two optimal conditions. This indicates that the component fractionation of corn stalk can be accomplished and enzymatic hydrolysis saccharification can be enhanced by two-stage microwave pretreatment method.
Number of references:16
Main heading:Saccharification
Controlled terms:Cellulose - Enzymatic hydrolysis - Fractionation - Glycerol - Hydrolysis - Lignin - Liquids - Microwave generation - Microwave power transmission - Microwaves - Optimization - Sugars
Uncontrolled terms:Corn stalk - Hemicelluloses - Hemicelluloses extractions - Microwave power - Microwave pretreatment - Microwave reactors - Optimal conditions - Pre-Treatment - Processing Time - Reducing sugars - Treatment time - Two stage
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 921.5 Optimization Techniques - 815.1.1 Organic Polymers - 804.1 Organic Compounds - 802.3 Chemical Operations - 802.2 Chemical Reactions - 714.2 Semiconductor Devices and Integrated Circuits - 711 Electromagnetic Waves - 706.1.1 Electric Power Transmission
DOI:10.3969/j.issn.1002-6819.2011.12.051
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603025
Title:Effects of aerobic fermentation pre-treatment on dry anaerobic fermentation gas production and its energy loss
Authors:Han, Jie (1); Xiang, Xin (1); Cheng, Hongsheng (1); Liu, Lihong (1)
Author affiliation:(1) Institute of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, Beijing 100125, China
Corresponding author:Han, J.(hanjie@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:12
Issue date:December 2011
Publication year:2011
Pages:246-249
Language: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 make clear the impact of different aerobic fermentation pre-treatments to gas production and energy loss of dry anaerobic fermentation, the experiments were done in controllable constant temperature fermentation device with material of cow dung and mixed straw. The energy loss was also analyzed. The results indicated that aerobic pre-treatment had significant effect on gas production. The longer time and the higher temperature of aerobic fermentation pre-treatment, the more gas production and energy was lost. The energy loss of aerobic fermentation pre-treatment was better when the temperature of aerobic fermentation approached to the anaerobic (35°C). But when aerobic fermentation temperature significantly higher than anaerobic fermentation (55°C), it would cause a great energy loss. Therefore, it was important to control the time and temperature of aerobic fermentation on membrane covered trough bioreactor. In order to reduce the gas production and energy loss, once it reached the required temperature, the system should be immediately convert to anaerobic fermentation state.
Number of references:16
Main heading:Fermentation
Controlled terms:Economics - Energy dissipation - Gases - Methane
Uncontrolled terms:Aerobic fermentation - Aerobic pre-treatment - Anaerobic fermentation - Constant temperature - Cow dung - Energy loss - Gas production - Gas productions - Higher temperatures - Pre-Treatment - Pre-treatments
Classification code:522 Gas Fuels - 525.4 Energy Losses (industrial and residential) - 802.2 Chemical Reactions - 931.2 Physical Properties of Gases, Liquids and Solids - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2011.12.046
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603028
Title:Effect of NaOH H
Authors:Liu, Yanping (1); Fang, Gang (1); Dang, Feng (1); Zhu, Baoning (1); Zhou, Qi (1); Xia, Yu (1); Li, Xiujin (1)
Author affiliation:(1) Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Corresponding author:Li, X.(xjli@mail.buct.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:260-263
Language: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 corn straw was pretreated by NaOH and H
Number of references:16
Main heading:Anaerobic digestion
Controlled terms:Agricultural wastes - Biodegradation - Biogas - Degradation
Uncontrolled terms:Biogas production - Corn straws - Degradation rate - Digestion time - NaOH H
Classification code:801.2 Biochemistry - 802.2 Chemical Reactions - 821.5 Agricultural Wastes
DOI:10.3969/j.issn.1002-6819.2011.12.049
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602997
Title:Soil salt movement and regulation of drip irrigation under plastic film in arid area
Authors:Yang, Pengnian (1); Dong, Xinguang (2); Liu, Lei (1); Yang, Xinxin (1); Zhang, Yuyu (1)
Author affiliation:(1) College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China; (2) Xinjiang Water Resources Bureau, Urumqi 830000, China
Corresponding author:Yang, P.(Ypn10@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:90-95
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Drip irrigation under plastic film had applied for more than 1.6 × 106 hm2 in Xinjiang, and the area was still increasing. In order to research soil salt movement of drip irrigation under plastic film in arid area, a series of tests had been carried out on mulched drip irrigation in Korla prefecture, located in the south of Xinjiang. According to the experimentations, some characteristics of drip irrigation under plastic film were discovered. After one times drip irrigation, the salt content of soil profile redistributed again and desalted zone, salt immovability zone and salt accumulation zone were formed. The results of calculation showed that the area of desalted zone were bigger than that of salt accumulation zone. Salt mainly accumulated under 40 cm layer or open filed area. Between depths of 0-40 cm, the effects of salt distribution by using double drip pipe were bigger than by using single drip pipe. Between depths of 0-80 cm, the effects of salt distribution by using single pipe were bigger than by using single double pipe. In the period of cottons growth, the profile salt content showed the trends of decrease under the action of periodic drip irrigation. And, a helpful micro-environment to cottons was formed. Thus, the drip irrigation under plastic film was not only a kind of accurate irrigation, but also could regulate soil salt on shallow profile under the field scale in crop growth and development period. This new approach could provide technical support for saving water and decreasing salt in arid area.
Number of references:14
Main heading:Irrigation
Controlled terms:Arid regions - Cotton - Film growth - Pipe - Plastic films - Salt removal - Salts - Soils
Uncontrolled terms:Arid area - Crop growth - Drip irrigation - Field scale - Regulation - Salt content - Soil profiles - Technical support - Xinjiang
Classification code:821.3 Agricultural Methods - 817.1 Polymer Products - 804.1 Organic Compounds - 712.1 Semiconducting Materials - 821.4 Agricultural Products - 619.1 Pipe, Piping and Pipelines - 445.1 Water Treatment Techniques - 444 Water Resources - 443 Meteorology - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2011.12.018
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603031
Title:Optical design of a linear reflecting solar concentrator with all-flat mirrors
Authors:Pu, Shaoxuan (1); Xia, Chaofeng (2)
Author affiliation:(1) Collage of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) Solar Energy Research Institute, Yunnan Normal University, Kunming 650092, China
Corresponding author:Pu, S.(sxpu2004@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:282-285
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to reduce the cost of solar concentrating collectors, flat mirrors were used to make reflectors in line focusing Fresnel collectors. Based on the optical principle of linear Fresnel concentration, several flat narrow silvered mirror strips were used to make a reflecting mirror unit on a tracing device. The primary mirrors of linear Fresnel collector were consisted of reflecting mirror units with different focal lengths. With new idea of receiver design, a double-arc secondary reflector was designed in order to collect more radiation and lessen the aperture of the receiver. Good results were obtained from the simulation of ray trace and experiments of testing device. The design of the reflecting mirror unit has the advantages of low cost, good sunlight concentration, expandable primary mirror field, very low wind load and stable tracing. The small scale concentrators can be applied to steam generation which can provide process heat for agricultural products drying. The large scale concentrators can provide steam for thermal electricity.
Number of references:16
Main heading:Mirrors
Controlled terms:Agricultural products - Concentration (process) - Design - Optical design - Ray tracing - Reflection - Solar collectors - Solar concentrators
Uncontrolled terms:Concentrating collector - Flat mirrors - Focal lengths - Fresnel - In-line - Low costs - Primary mirrors - Process heat - Ray trace - Receiver design - Reflecting mirrors - Small scale - Steam generation - Testing device - Thermal electricity - Wind load
Classification code:408 Structural Design - 702.3 Solar Cells - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.3 Chemical Operations - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2011.12.053
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602981
Title:Kinematics modeling and parameters optimization of seedling pick-up mechanism of planetary gear train with eccentric gear and non-circular gear
Authors:Ye, Bingliang (1); Yu, Gaohong (1); Chen, Zhiwei (1); Zhao, Yun (1)
Author affiliation:(1) College of Machinery 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:12
Issue date:December 2011
Publication year:2011
Pages:7-12
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In the current vegetable transplanting operation, the semi-automatic transplanting mechanism exists the shortcomings of artificial feeding seedlings and low efficiency, and the Japanese automatic transplanting mechanisms have the questions of complicated structure, high manufacturing costs and not-very-high efficiency, so a new kind of automatic seedling pick-up mechanism of planetary gear train with eccentric gear and non-circular gear was designed for being used in automatic vegetable transplanter. Based on the analysis of structural features and work principle of the rotary automatic seedling pick-up mechanism, its kinematic model was established. Then, a computer-aided analysis and optimization software based on Visual Basic6.0 was developed for optimizing structural parameters of the mechanism. At last, by means of the man-machine interactive optimization method, the influence law of the structural parameters to the kinematic locus of the seedling pick-up arm cusp and optimization objectives were acquired, and the structural parameters were optimized to meet the requirements of picking up vegetable seedlings from cell tray.
Number of references:18
Main heading:Gear manufacture
Controlled terms:Computer aided analysis - Epicyclic gears - Kinematics - Models - Optimization - Pickups - Shape optimization - Vegetables
Uncontrolled terms:Complicated structures - Eccentric gears - Interactive optimization - Kinematic model - Kinematics modeling - Manufacturing cost - Non-circular gears - Optimization software - Parameters optimization - Picking up - Planetary gear train - Semi-automatics - Structural feature - Structural parameter - Vegetable seedlings - Work principle
Classification code:931.1 Mechanics - 921.5 Optimization Techniques - 902.1 Engineering Graphics - 821.4 Agricultural Products - 752.3.1 Sound Reproduction Equipment - 723.5 Computer Applications - 601.2 Machine Components
DOI:10.3969/j.issn.1002-6819.2011.12.002
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603019
Title:Effect of turning and covering techniques on pig manure-straw composting property
Authors:Hua, Dangling (1); Liu, Fang (1); Li, Guoxue (2); Jiang, Tao (2)
Author affiliation:(1) Eng. Research Center of Agricultural Resources and Environment of Henan Provincial Universities, College of Resources and Environmental Science, Henan Agricultural University, Zhengzhou 450002, China; (2) College of Resources and Environment Science, China Agriculture University, Beijing 100193, China
Corresponding author:Hua, D.(collegehua@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:210-216
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Experiments were carried out to investigate the effect of turning frequency and covering on manure-straw compost properties in natural rotting box frame system. Six treatments were conducted, which had different tuning frequency that are one time per week, one time every two week and non-turning respectively, and each treatment have cover or non-cover. By taking various kinds of indexes test and statistical analysis, the results indicated that the turning could remarkably promote material volume decreasing (P=0.0001), temperature rising (P=0.0000) and degradation of TOM (P=0.0080), and improve GI remarkably (P=0.0330), but turning also increase the NH
Number of references:28
Main heading:Waste treatment
Controlled terms:Composting - Degradation - Electric conductivity - Manures - Straw - Turning
Uncontrolled terms:Covering - Environmental factors - Germination index - High temperature phase - Nitrogen loss - pH value - Small and medium-sized enterprise - Temperature rising - Total nitrogen - Total organic matter - Tuning frequency
Classification code:452.4 Industrial Wastes Treatment and Disposal - 604.2 Machining Operations - 701.1 Electricity: Basic Concepts and Phenomena - 802.2 Chemical Reactions - 821.5 Agricultural Wastes
DOI:10.3969/j.issn.1002-6819.2011.12.040
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602992
Title:Modeling and simulation for powertrain of electric vehicle based on bond graph
Authors:Wang, Tao (1); Wang, Qing (1); Li, Yong (2)
Author affiliation:(1) School of Quality Technology Supervisor, Hebei University, Baoding 071000, China; (2) School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Corresponding author:Wang, T.(taowangustbntu@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:64-68
Language: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 fundamental principle of bond graph theory was stated in this paper, and then the theory was applied to design a complete bond model of electric vehicle motor powertrain system according to the analysis on dynamical performance and interaction of each unit in the power train system for electric vehicle, and the state equations of system were established. Finally the bond model was simulated by Matlab software. The simulation result shows that the bond graph is a valid method to integrate both bond graph theory and SIMULINK simulation into system dynamics analysis can be applied to dynamics modeling and analysis of vehicle power transmission.
Number of references:16
Main heading:Graph theory
Controlled terms:Automobile exhibitions - Bond strength (materials) - Computer simulation - Electric vehicles - Engineering exhibitions - Equations of state - MATLAB - Models - Powertrains - Vehicle transmissions
Uncontrolled terms:Bond graph - Bond models - Dynamical performance - Dynamics modeling - Fundamental principles - Matlab- software - Modeling and simulation - Power-train systems - Simulink simulations - State equations - System Dynamics
Classification code:951 Materials Science - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 902.1 Engineering Graphics - 901.2 Education - 723.5 Computer Applications - 662.4 Automobile and Smaller Vehicle Components - 662 Automobiles and Smaller Vehicles - 602.2 Mechanical Transmissions - 432 Highway Transportation - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2011.12.013
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603045
Title:Mechanical properties test and finite element analysis for litchi
Authors:Chen, Yan (1); Cai, Weiliang (1); Zou, Xiangjun (1); Xiang, Heping (1); Liu, Tianhu (1); Xu, Fengying (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, College of Engineering, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Zou, X.(xjzou1@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:358-363
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to reduce the mechanical damage of litchi in harvesting, storage and transportation, the macro and micro mechanical properties of litchi were studied. Through the compression experiment, elastic modulus of litchi hull, flesh, and core parts were determined. The measured data indicated that the mechanical parameters in the vertical direction were greater than that in the horizontal direction. Additionally, the rupture force in the in the vertical and horizontal direction were 101.691N and 81.253N respectively, while the elastic modulus were 0.37 MPa and 0.27 MPa, and the relative deformation were 30.33 % and 28.86 %. Meanwhile, the cracked hull characteristics also could be observed. A mechanical model of litchi was established by using of finite element method. The simulation values were consistent with the experimental values comparatively. And the correlation coefficient between them was over 0.999. In this paper, the model was used to study the distribution of stress under compressive load, and to analysis its anti-extrusion capacity and cracked hull characteristics, and to verify the feasibility of numerical simulation. The analysis results showed that the anti-extrusion capacity of litchi fruit was anisotropic. The vertical direction of litchi could bear greater pressure and deformation than the horizontal direction under the same pressure. When compressing, the shell would rupture under tensile stress. And the crack would extend along the direction of external force, whose section accorded with the compression direction. By the use of finite element model established, the micro-mechanical properties of litchi can be studied and analyzed. The results can provide basis and help for the design of operation equipments and reduction of mechanical damage of litchi.
Number of references:15
Main heading:Finite element method
Controlled terms:Computer simulation - Deformation - Elastic moduli - Extrusion - Mechanical properties - Tensile strength
Uncontrolled terms:Analysis results - Compression directions - Compressive loads - Core part - Correlation coefficient - Cracked hull - Experimental values - External force - Finite Element - Finite element models - Litchi - Litchi fruit - Measured data - Mechanical damages - Mechanical model - Mechanical parameters - Mechanical properties test - Micro-mechanical - Micromechanical property - Relative deformation - Rupture forces - Vertical direction
Classification code:421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 535.2.2 Metal Forming Practice - 723.5 Computer Applications - 921.6 Numerical Methods - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2011.12.067
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602985
Title:Calculation and analysis on capability of embedment and balance of synthesized left-turn driven disc plow
Authors:Zhu, Hengyin (1); Fang, Wenxi (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Corresponding author:Zhu, H.(zhyli503@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:29-32
Language: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 solution was presented to increase the ability of embedment and improve the balance of power driven disc plow in dry-land. It synthesized left-turn power driven disc plow and moldboard plow. The new plow need no tail-wheel that much simplified the structure. As a result, the overall weight of the new plow was reduced, and the cost on material and manufacture was lowered. By calculating the embedment moment of plow and the support area of lateral-force balance device upon the plow groove, results showed that the embedment moment of the new plow was enlarged 58.8%, and the balance capacity was enhanced 2-4 times. Thus it increases the plowing depth and fulfills the demand of general agronomy in dry-land.
Number of references:12
Main heading:Agricultural machinery
Controlled terms:Calculations - Cultivation
Uncontrolled terms:Balance - Driven disc plow - Moldboard plows - Plow groove - Synthesize
Classification code:721 Computer Circuits and Logic Elements - 723 Computer Software, Data Handling and Applications - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2011.12.006
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603049
Title:Effects of storage temperature and modified atmosphere packaging on egg preservation
Authors:Liu, Meiyu (1); Lian, Haiping (2); Ren, Fazheng (3)
Author affiliation:(1) Department of Food Science, Hebei University of Engineering, Handan 056021, China; (2) Handan Bureau of Agriculture and Animal Husbandry, Handan 056001, China; (3) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Ren, F.(Renfazhen@263.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:378-382
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to extend the storage period of eggs, the research was carried out to study the effects of modified atmosphere packaging (MAP) with different air components on egg preservation at 25°C and 4°C. The results showed that eggs were AA degree when stored in MAP with the gas composition of 50%CO
Number of references:20
Main heading:Modified atmosphere packaging
Controlled terms:Carbon dioxide - Energy storage - Packaging - Temperature
Uncontrolled terms:Air components - Different effects - Egg - Gas compositions - Haugh unit - Storage periods - Storage temperatures - Weight loss rates
Classification code:641.1 Thermodynamics - 694.1 Packaging, General - 702 Electric Batteries and Fuel Cells - 804.2 Inorganic Compounds
DOI:10.3969/j.issn.1002-6819.2011.12.071
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602998
Title:Influence of climatic warming on accumulation of trace elements in spring wheat (Triticum aestivum L.)
Authors:Li, Yu (1); Zhang, Qiang (1); Wang, Runyuan (1); Liu, Ning (3); Wang, Heling (1); Xiao, Guoju (4); Gou, Xin (5); Ma, Zhiying (2)
Author affiliation:(1) Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China; (2) School of Chemical Engineering, Northwest University for Nationalities, Lanzhou 730030, China; (3) Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy Sciences, Lanzhou 730000, China; (4) Bioengineering Institute of Ningxia University, Yinchuan 750021, China; (5) South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
Corresponding author:Zhang, Q.(zhangqiang@cma.gov.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:96-104
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The objective of this study was to investigate the effect of temperature raising on solubility of trace elements in soil, and the bioavailability of trace elements in spring wheat (Triticum aestivum L.) A simulated warming manipulation was conducted to evaluate the effect of temperature raising on Cd, Cu, Fe and Zn accumulation of spring wheat in Dingxi, Gansu province, the semiarid northwest of China. The results of the study revealed that temperature raising will lead to a significant change in trace element concentration in soil and spring wheat. Compared with control, the strongest effects of 3°C temperature raising were that the trace elements concentrations in grain of Xihan 1, Xihan 2 and Xihan 3 decreased by 43.4%, 11.1% and 13.4% on Cd, and 30.4%, 25.1% and 10.8% on Cu, respectively. But it was converse for the concentrations of Fe and Zn in grain of spring wheat, the concentration of Zn increased by 28.9% and 35.8% respectively in grain of Xihan under 1°C and 3°C temperature raising treatments. According to the change of temperature raising with 1.9°C by 2050 in semiarid northwestern of China, the elements concentrations in spring wheat will be in a range of Cd (0.59-0.65 mg/kg), Cu (5.91-7.64 mg/kg), Zn (63.73-69.41 mg/kg) and Fe (185.23-202.70 mg/kg), respectively.
Number of references:45
Main heading:Trace elements
Controlled terms:Biochemistry - Grain (agricultural product) - Soil pollution - Temperature - Zinc
Uncontrolled terms:Climatic changes - Climatic warming - Effect of temperature - Elements in soil - Gansu province - Spring wheat - Spring wheat (Triticum aestivum L.) - Trace element concentrations - Trace elements concentration
Classification code:821.4 Agricultural Products - 804 Chemical Products Generally - 801.2 Biochemistry - 801 Chemistry - 641.1 Thermodynamics - 546.3 Zinc and Alloys - 454.2 Environmental Impact and Protection
DOI:10.3969/j.issn.1002-6819.2011.12.019
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603044
Title:Design and experiments of the fruit and vegetable three-dimensional dicing machine
Authors:Hu, Jianping (1); Huang, Yingsa (1); Yang, Deyong (1)
Author affiliation:(1) Key Laboratory of Modern Agriculture Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang, 212013, China
Corresponding author:Hu, J.(hujp@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:353-357
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the cutting quality and cutting efficiency of domestic dicing machine, a new fruit and vegetable dicing machine was designed. The machine adopted three-dimensional dicing technology, including rotary propeller feeding, slicing by centrifugal cutting method, shredding by disk grill knives and finally dicing by crosscut knives. The structure and working principle of the machine was described, the forces of potato in centrifugal cutting roller was studied, and then the minimum rotating speed of the roller was determined (133.3 r/min). Analysis of small cross-section curve equation, diced cross section could be found in three different shapes. By comparing the diced cross-section shape and bias under the different corresponding rotating speed ratio between centrifugal cutting roller and crosscut knives, the optimum ratio was obtained (0.17). Prototype cutting experiments showed that smooth potato cubes with specifications of 15 mm × 15 mm × 15 mm and 20 mm × 20 mm × 20 mm were cut out, the relative percentage of irregularity degree was 11.7% and 12.7%, all less than 15%.Therefore, the expected target has been achieved, and a reference was provided for the development of new fruit and vegetable dicing machine.
Number of references:14
Main heading:Three dimensional
Controlled terms:Centrifugation - Cutting - Design - Experiments - Fruits - Rollers (machine components) - Rotating machinery - Rotation - Vegetables
Uncontrolled terms:Cross section - Cut-out - Cutting efficiency - Cutting experiment - Cutting quality - Dicing machines - Fruit and vegetable - Fruit and vegetables - Optimum ratio - Rotating speed - Working principles
Classification code:901.3 Engineering Research - 821.4 Agricultural Products - 802.3 Chemical Operations - 902.1 Engineering Graphics - 604.1 Metal Cutting - 601.1 Mechanical Devices - 408 Structural Design - 601.2 Machine Components
DOI:10.3969/j.issn.1002-6819.2011.12.066
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603017
Title:Effect of double and triple layers coating technique on controlled release properties of waterbased resin coating material
Authors:Yu, Jiangang (1); Fan, Xiaolin (1); Liu, Fang (1)
Author affiliation:(1) Fertilizer Science and Balanced Fertilization Research Laboratory, College of Nature Resource and Environment Science, South China Agriculture University, Guangzhou 510642, China
Corresponding author:Fan, X.(xlfan@scau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:200-203
Language: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 controlled release properties of water medium resin as coating material (WMRM), multi-layer coating technique that based on a bottom spraying fluid-bed coater was used to manufacture double and triple layers coating urea that were made from the WMRM as a coating layer and the additive lipid soluble resin (LSR) as the isolation layer. The double layers consisted of a coating layer as the inner one and an isolation layer as the outer one, the triple layers consisted of two isolation layers and a coating layer between them. Further more, the effects of double and triple layers coating technique on controlled release properties of coating layer with the WMRM were evaluated via the nutrient release characteristics from the multi-layer coating ureas. The results as follows, the nutrient longevity of the coated ureas by the triple layers coating technique could be extended as five times as that by double layers coating technique. By the triple layers coating technique, the thickness of the inner isolation LSR layer from 5 to 15 g/m2 could affect the longevity hardly. With the same technique, the triple layer coating urea had longevity as long as about 260 days with 50 g/m2 WMRM as the coating layer and 10 g/m2 LSR as the outer isolation layer. However, nutrient release patterns of triple layers coating ureas were affected by thickness of the inner isolation layer. When the outer isolation material applied was 10 g/m2 and more, the nutrient release curve was transformed from parabolic to sigmoid. It concluded that the triple layers coating technique which with the WMRM as the coating layer and the LSR as the isolation layer could improve the controlled release properties of the WMRM significantly. The appropriate amount of the inner isolation LSR layer is among 5 and 10 g/m2.
Number of references:14
Main heading:Coatings
Controlled terms:Fertilizers - Metabolism - Nutrients - Plating - Resins - Urea
Uncontrolled terms:Coating layer - Coating material - Controlled release - Controlled release properties - Double layers - Fluid-beds - Isolation materials - Longevity - Multi-layer-coating - Nutrient release - Resin coating - Water based
Classification code:461.9 Biology - 539 Metals Corrosion and Protection; Metal Plating - 539.3 Metal Plating - 804 Chemical Products Generally - 815.1.1 Organic Polymers - 821.2 Agricultural Chemicals
DOI:10.3969/j.issn.1002-6819.2011.12.038
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603015
Title:Impacts of room temperature on sow behaviour and creep box usage for pre-weaning piglet
Authors:Gao, Yajun (1); Li, Baoming (2); Li, Mingli (3); Lin, Baozhong (1); Gu, Zhaobing (1)
Author affiliation:(1) Chongqing Academy of Animal Sciences, Chongqing 402460, China; (2) Key Laboratory of Structure and Environment in Agricultural Engineering, Ministry of Agriculture, China Agricultural University, Beijing 100083, China; (3) College of Animal Science and Technology, Yunnan Agricultural University, Kunming, 650201, China
Corresponding author:Gu, Z.(zhaobinggu@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:12
Issue date:December 2011
Publication year:2011
Pages:191-194
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The research aims to obtain baseline information of the impacts of room temperature on lactating sow behaviour and pre-weaning piglet creep box usage. Twelve Yorkshire pregnant sows were randomly assigned to hot (30.4°C) and warm room temperature groups (15.3°C), i.e. 6 sows per treatment. Results demonstrated the pre-weaning piglet creep box usage for warm litters (62.4%) was higher than that of hot litters (1%). Sows from warm group had higher time partitioning (%) in standing and kneeling than that of sows from hot group. The warm sows showed longer transition (falling) time from standing to lying, as compared to the hot sows, respectively (4.0 s vs 3.4 s). The frequency of posture transition from sitting to belly lying or versa of warm sows was lower than that of hot sows (P<0.01). No piglet was crushed in warm group, but there was a higher pre-weaning piglet crushing mortality (15.2%) in hot group. Piglet from warm group showed better growth performance and higher average daily gain than those from hot groups. The present study suggest a suitable temperature gradient between creep box and farrowing room was conducive to increasing the box usage and hence decreasing crushing mortality for pre-weaning piglets.
Number of references:16
Main heading:Behavioral research
Controlled terms:Creep - Crushing - Temperature - Vehicles
Uncontrolled terms:Growth performance - Piglet - Room temperature - Sow - Temperature gradient - Time partitioning - Yorkshires
Classification code:421 Strength of Building Materials; Mechanical Properties - 432 Highway Transportation - 641.1 Thermodynamics - 802.3 Chemical Operations - 951 Materials Science - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2011.12.036
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603003
Title:Knowledge-based fertilization recommendation system and application
Authors:Ren, Zhouqiao (1); Chen, Jian (2); Cheng, Jieliang (3); Ma, Wanzhu (1); Lü, Xiaonan (1)
Author affiliation:(1) Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (2) Soil and Fertilizer Management Station of Wenling City, Wenling 317500, China; (3) Soil and Fertilizer Management Station of Zhejiang Province, Hangzhou 310020, China
Corresponding author:Ren, Z.(renzhouqiao@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:126-131
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Crop fertilization recommendation system involves using models to calculate the needed amount of variety of nutrients during the crop growth, choosing suitable fertilizers, and arranging fertilization time. Whether it can be used widely or not, the key point is that the models or parameters in system can be customized easily with local agricultural production practices. To help address these issues, a software infrastructure is proposed. It adopts concepts form knowledge base with the aim of providing an overall logical framework for fertilization recommendation, in which the knowledge base as the interface between local entities and program code, and the professional fertilization mechanism as the inference engine. This paper discusses the fertilization knowledge's classification, representation, storage and the relations with data entities, and presents the design of knowledge base and its application. Based on this method, a practical software system for cultivated land quality and fertilization management has been developed by integrating with GIS, and the scalability and localizability has been demonstrated by more than thirty counties' cases.
Number of references:14
Main heading:Recommender systems
Controlled terms:Crops - Expert systems - Fertilizers - Knowledge representation
Uncontrolled terms:Agricultural productions - Crop fertilization - Crop growth - Cultivated lands - Data entities - Fertilization recommendation - Keypoints - Knowledge base - Localizability - Logical frameworks - Program code - Software infrastructure - Software systems
Classification code:723 Computer Software, Data Handling and Applications - 804 Chemical Products Generally - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2011.12.024
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602988
Title:Design of cam mechanism of solar tracking based on COSMOSMotion
Authors:Zheng, Shuo (1); Li, Mingbin (2); Yin, Dongwen (1); Yang, Liubin (1)
Author affiliation:(1) College of Mechanical Engineering, Ningxia University, Yinchuan 750021, China; (2) NewEnergy Research Center, Ningxia University, Yinchuan 750021, China
Corresponding author:Li, M.(lmb_lhb@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:43-46
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The development of solar tracking technology to promote solar energy utilization is significance. An ingenious mechanism of cam plunger with single drive, dual-axis tracking function for solar tracking was designed in the paper, which achieved tracking solar azimuth and altitude angle at same time by a single driver. Design of solar tracking device was completed using the following methods: exhaustively method was used for determination of device structure size, solar altitude angle data points of per day during one year were calculated by using Matlab, cam contour was simulated by COSMOSMotion software with altitude angel data points inputs, the solid modeling of solar tracking device was completed by application Solidworks. By comparison position of solar altitude angle with practical test of prototype and theory computation, error precision of tracking device was within 7%. Compared with other similar products, the tracking device has features of low energy consumption, high reliability, strong anti-interference ability and easy maintenance and is applicable to various small civilian solar devices.
Number of references:14
Main heading:Solar energy
Controlled terms:Cams - Computation theory - Energy utilization - Equipment - Simulators - Trajectories
Uncontrolled terms:Anti-interference - Cam mechanism - Data points - Device structures - Dual axis - Error precision - High reliability - Low energy consumption - Practical tests - Solar altitude angle - Solar tracking - Solid-modeling - SolidWorks - Theory computation - Tracking device - Tracking devices - Tracking function
Classification code:901 Engineering Profession - 671 Naval Architecture - 621 Nuclear Reactors - 921 Mathematics - 615.2 Solar Power - 525.3 Energy Utilization - 404.1 Military Engineering - 601.3 Mechanisms
DOI:10.3969/j.issn.1002-6819.2011.12.009
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603039
Title:Planning of land consolidation project based on ecological rehabilitation in rock desertification mountainous area
Authors:Li, Can (1); Luo, Haibo (2)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (2) Institute of Environment and Resources, Guizhou University, Guiyang, Guizhou 550003, China
Corresponding author:Luo, H.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:324-329
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Ecological rehabilitation is an effective way to realize the sustainability of land use in rock desertification mountainous, and land consolidation is an effective choice for improving land use. So, it can create a new route to achieve the goals of land consolidation and control of desertification by means of ecological rehabilitation. Taking a typical land consolidation project as an example, based on ecological rehabilitation, the paper analyzed the characteristics of land consolidation engineering design for rock desertification area, which including land leveling project design in different types of surface configurations, engineering design of farmland water conservancy in karst region, and vegetation restoration for farmland shelterbelt network construction, and road design for protecting ecosystem. Moreover, the paper made tracing monitoring on the ecological restoration and farmland construction effect based on the results of these engineering designs. Results showed that the planning of land consolidation project based on ecological rehabilitation was beneficial for the improvement of ecology and sustainable land use in rock desertification mountainous area.
Number of references:15
Main heading:Highway planning
Controlled terms:Climatology - Concrete beams and girders - Design - Ecology - Farms - Land use - Planning - Restoration - Rocks
Uncontrolled terms:Consolidation projects - Construction effect - Ecological rehabilitation - Ecological restoration - Engineering design - Land leveling - Mountainous area - Network construction - Project designs - Road design - Surface configuration - Vegetation restoration - Water conservancy
Classification code:481.1 Geology - 454.3 Ecology and Ecosystems - 443 Meteorology - 412 Concrete - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 409 Civil Engineering, General - 406.1 Highway Systems - 403 Urban and Regional Planning and Development - 402 Buildings and Towers - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2011.12.061
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603041
Title:Estimation of land consolidation potential of rural residential areas based on constraint of relocation distance
Authors:Fan, Fang (1); Liu, Yanfang (1); Liang, Junhong (1); Li, Yiqiong (1)
Author affiliation:(1) School of Resource and Environment Science, Wuhan University, Wuhan 430079, China; (2) Key Laboratory of Geographic Information System, Ministry of Education, Wuhan University, Wuhan 430079, China
Corresponding author:Liu, Y.(yfliu610@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:337-342
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Estimation of rural residential land consolidation potential is important for land consolidation planning. In order to get the reasonable estimation of the consolidation potential of rural residential areas, a new acculation method of the realistic potential was discussed in this paper. Taking Binyang County, Guangxi Autonomous Region as a case, an improved model of Method of Constructive Land Standard per capita (MCLS) was established in this paper, which used the relocation distance as a constraint. Based on the questionnaires of relocation willingness, the consolidation potential of rural residential areas in Bingyang County in 2020 was calculated by this model. The results showed that: compared with the traditional MCLS, the calculated potential reduced 30.33% while considering the relocation distance, which indicated the significant influences of relocation distance on the land consolidation potential of rural residential areas. Considering the constraint of relocation distance, the relocation areas could be reduced effectively, so as to reduce the compensation of relocation households under the ArcGIS platform. Besides, for the consideration of their behalf, the consolidation was reliable to get support from the local residents. Thus the new model was feasible and promising.
Number of references:20
Main heading:Estimation
Controlled terms:Land use - Models - Regional planning - Rural areas - Surveys
Uncontrolled terms:Guangxi - Households' willingness - Improved models - Local residents - Method of constructive land standard per capita - New model - Per capita - Realistic potentials - Residential areas
Classification code:403 Urban and Regional Planning and Development - 403.2 Regional Planning and Development - 405.3 Surveying - 902.1 Engineering Graphics - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2011.12.063
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603018
Title:Effects of inoculums and carbon nitrogen ratio of organic waste on solid acidification at initial start
Authors:Chen, Ling (1); Du, Lianzhu (2); Dong, Baocheng (1); Zhao, Lixin (1); Zhang, Keqiang (2); Wan, Xiaochun (1); Gao, Xinxing (1); Luo, Juan (1)
Author affiliation:(1) Institute of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, Beijing 100125, China; (2) Institute of Agro-environmental Protection, Ministry of Agriculture of China, Tianjin 300191, China
Corresponding author:Zhao, L.(zhaolixin5092@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:204-209
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To optimize the initial acidogenic conditions of pig manure mixture with straws, effects of different sludge (activated and digestion sludge) and carbon nitrogen ratios (11.9, 16.0, 17.8 and 22.2) on solid acidogenic process at initial start were investigated to obtain a better inoculum and suitable ratio of pig manure and crop straws. The results showed that activated sludge had higher abilities of degradation and acid production. When carbon nitrogen ratio was adjusted to 17.8 and the mixture was inoculated with activated sludge, volatile acid concentration and VS degradation were elevated to 14 g/L and 23%, whereas acetic and propionic acid contents in volatile acid were stabled at 50% and 20%, respectively. The results demonstrated a favorable hydrolytic and acidogenic performance was occurred, which can meet the requirement of acidogenic process at initial start.
Number of references:15
Main heading:Sludge digestion
Controlled terms:Activated sludge process - Anaerobic digestion - Carbon - Degradation - Fatty acids - Manures - Nitrogen - Organic acids - Sewage
Uncontrolled terms:Acid production - Acidogenic - Activated sludge - Carbon nitrogen ratio - Digestion sludge - Organic wastes - Pig manures - Propionic acids - Volatile acids
Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds
DOI:10.3969/j.issn.1002-6819.2011.12.039
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602987
Title:Design of compulsory clamp-type precision seed-metering device for corn
Authors:Fu, Wei (1); Li, Shufeng (1); Sun, Jiayi (2); Yang, Hongying (1); Kan, Za (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China; (2) Harbin Matine Boiler and Turbin Research Institute, Harbin 150078, China
Corresponding author:Kan, Z.(kz_mac@shzu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:38-42
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Cultivation technology of mulching film coverage, drip irrigation under film and hole sowing above film is adopted for corn cultivation in Xinjiang. Aiming at technical requirement of precision metering hole sowing for corn above film and according to the principle of compulsory clamping, a new method of mechanical compulsory clamp-type of precision metering corn seed sowing was put forward in this paper. Through measuring physical mechanics characteristics of three types of corn seeds as well as deeply and theoretically analyzing the process of seed picking and seed charging, mathematical model was set up, so as to provide the basis for the structural design of seed sowing device. Bench test for preproduction seed sowing device was carried out on seed sowing device test bed of JPS-12 computer visual technology, so as to validate that compulsory clamp-type of seed sowing device had good adaptability to corn of small round and small flat shapes, as well as to verify that single grain rate was greater than 85%, which meeting the requirement of precision seed sowing.
Number of references:16
Main heading:Seed
Controlled terms:Agricultural machinery - Cultivation - Design - Equipment - Equipment testing - Irrigation - Machine design - Mathematical models - Structural design
Uncontrolled terms:Bench tests - Compulsory clamp-type - Corn - Corn cultivation - Corn seeds - Drip irrigation - Film coverage - Physical mechanics - Precision metering - Seed sowing - Seed-metering device - Single grains - Technical requirement - Xinjiang
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 901 Engineering Profession - 601 Mechanical Design - 408.1 Structural Design, General - 408 Structural Design - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2011.12.008
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603021
Title:Comparison of grey model and ARMA model for predicting the number of monthly new outbreaks of CSF
Authors:Luan, Peixian (1); Xiao, Jianhua (1); Chen, Xin (1); Xu, Qiang (1); Wang, Hongbin (1)
Author affiliation:(1) College of Animal Medicine, Northeast Agriculture University, Harbin 150030, China
Corresponding author:Wang, H.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:223-226
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:The quantitative prediction of the number of monthly new outbreaks of CSF can provide animal disease prevention and control departments the basis for taking selective preventive measures. Grey model and ARMA model were chosen to predict the number of monthly new outbreaks of CSF in Guizhou province, China. By grey model and ARMA model, outbreaks of CSF in Guizhou province were predicted according to the statistical data from veterinary bulletin from 2005 to 2008, and both models were assessed by the statistical data in 2009. Mean absolute error of grey model and ARMA model was 1.84 and 1.48 respectively, while mean absolute percentage error of two models was 0.272 and 0.229. The results showed that the prediction precision of ARMA model was higher than grey model, and ARMA model was feasible and effective for the prediction of CSF outbreaks in Guizhou province, China.
Number of references:17
Main heading:Random processes
Controlled terms:Animals - Disease control - Diseases - Forecasting - Models - Time series
Uncontrolled terms:Animal disease - ARMA model - Classic swine fever - Grey Model - Guizhou Province - Mean absolute error - Mean absolute percentage error - Prediction precision - Preventive measures - Quantitative prediction - Statistical datas
Classification code:922.1 Probability Theory - 902.1 Engineering Graphics - 822 Food Technology - 922.2 Mathematical Statistics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 471 Marine Science and Oceanography - 461 Bioengineering and Biology - 814 Leather and Tanning
DOI:10.3969/j.issn.1002-6819.2011.12.042
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602984
Title:Distribution of rapeseed sowed by 2BFQ-6 precision planter
Authors:Yang, Song (1); Liao, Qingxi (1); Chen, Li (1); He, Dali (1)
Author affiliation:(1) College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Liao, Q.(liaoqx@mail.hzau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:23-28
Language: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 the distribution of rape seedlings sowed by 2BFQ-6 precision planter for rapeseed, fifty-eight samples which totally contained about 7, 041 seedlings were collected using the Grid method, and statistical analysis was carried out by the methods of Curve fitting, ANOVA and Duncan multiple range test. Results indicated that the spacing of rape seedlings for each row obeyed exponential distribution whose parameters were 0.0245, 0.0296, 0.0264, 0.0294, 0.0283 and 0.0308, respectively. The range of correction coefficient for theoretical spacing was from 1.172 to 1.250. The stability of total seeding quantity for the planter was reliable. The error between the real row spacing and the theoretical row spacing was less than 5%, and the triangle expression of Fourier series could be used to analysis the stability of real row spacing. The distribution obtained from this experiment provides a basic reference for the optimization of structure and the improvement of seeding process, and it is also of great value to the operation of 2BFQ-6 precision planter.
Number of references:18
Main heading:Curve fitting
Controlled terms:Crops - Distribution functions - Fourier series - Oilseeds - Structural optimization - Testing
Uncontrolled terms:Correction coefficients - Duncan multiple range test - Exponential distributions - Grid methods - Rape seedling - Row spacing - Seeder - Seeding process
Classification code:423.2 Non Mechanical Properties of Building Materials: Test Methods - 821.4 Agricultural Products - 921 Mathematics - 922.1 Probability Theory - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2011.12.005
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602993
Title:Parameter matching and experimental study of powertrain for extended-range electric car
Authors:Chen, Hanyu (1); Zuo, Chengji (1); Teng, Qin (1); Yuan, Yinnan (2)
Author affiliation:(1) School of Mechanical and Automobile Engineering, Hefei University of Technology, Hefei 230009, China; (2) School of Mechanical Engineering, Nantong University, Nantong 226019, China
Corresponding author:Chen, H.(losttheway@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:69-73
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Taking an extended-range electric car as example, based on the definite vehicle performance and system architecture, the parameter matching analysis and related experimental study of powertrain including electric drive system, energy storage system, extended-range equipment and control modes so on were carried out. Through the co-simulation of Matlab/Simulink and Advisor, the drivability of E-REV was simulated in the NEDC driving cycle. The simulation and test results show that the generated power is ensured 6 kW, when the engine speed is 2800 r/min. The SOC curve of battery abides by the control strategy of charge depleting mode, and the torque output of motor meets the driving performance of E-REV. The definite scheme of powertrain can meet the primary performance requirements of E-REV.
Number of references:15
Main heading:Electric control equipment
Controlled terms:Automobile drivers - Computer architecture - Computer control systems - Computer simulation - Electric drives - Electric vehicles - Experiments - Fueling - Powertrains
Uncontrolled terms:Control modes - Control strategies - Cosimulation - Driving cycle - Driving performance - Electric drive system - Energy storage systems - Engine speed - Experimental studies - MATLAB /simulink - Parameter matching - Performance requirements - System architectures - Vehicle performance
Classification code:901.3 Engineering Research - 732.1 Control Equipment - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment - 705 Electric Generators and Motors - 663.2 Heavy Duty Motor Vehicle Components - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels - 432 Highway Transportation
DOI:10.3969/j.issn.1002-6819.2011.12.014
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602994
Title:Effects of precipitation and nitrogen on spring corn yield in black soil regions
Authors:Zhao, Jingkao (1); Lu, Jing (1); Gu, Siyu (1); Gong, Zhenping (2); Wen, Yanchen (1)
Author affiliation:(1) Resources and Environmental Sciences College, North-East Agricultural University, Harbin 150030, China; (2) Agronomy College, North-East Agricultural University, Harbin 150030, China; (3) Experimental station of China Agricultural Academy in Dezhou, Dezhou 253015, China
Corresponding author:Zhao, J.(zhaojingkao@yahoo.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:74-78
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The objective of this study was to distinguish effects of main growing factors on the corn yield under dry-farming conditions. A corn field experiment with three factors and four levels for each factor was conducted using the same corn cultivar and the same design in three consecutive years on a black soil classified as typic udolls of which the available nitrogen is middle but both available phosphorus and potassium are high. The results showed that, the most limiting factors to corn yield were respectively precipitation in growing season (PGS), rate of nitrogen fertilizer and available nitrogen contents of soil. Only when the PGS was greater than 280 mm, was nitrogen fertilizer effect statistically noticeable. The appropriate combination of nitrogen, phosphorus and potassium fertilizers increased the water use efficiency by 24.3% compared to no fertilizer treatment. Corn yield was positively correlated with the available nitrogen contents of soil too, meaning that higher soil available nitrogen contents are favorable to the increase in corn yield.
Number of references:20
Main heading:Nitrogen fertilizers
Controlled terms:Experiments - Nitrogen - Nitrogen fixation - Phosphorus - Potassium - Potassium fertilizers - Precipitation (chemical) - Soils - Water supply
Uncontrolled terms:Available nitrogen - Available phosphorus - Black soil - Corn - Corn fields - Corn yields - Dry-farming - Growing season - Limiting factors - Water use efficiency
Classification code:804.2 Inorganic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 901.3 Engineering Research - 802.2 Chemical Reactions - 483.1 Soils and Soil Mechanics - 446.1 Water Supply Systems - 549.1 Alkali Metals
DOI:10.3969/j.issn.1002-6819.2011.12.015
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603047
Title:Optimization of oyster-associated bacteria inactivation by dense phase carbon dioxide based on neural network
Authors:Zhang, Liang (1); Liu, Shucheng (1); Zhang, Chaohua (1); Ji, Hongwu (1); Gao, Jialong (1); Deng, Chujin (1)
Author affiliation:(1) Key Laboratory of Advanced Processing of Aquatic Products, Guangdong Higher Education Institution College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
Corresponding author:Liu, S.(Lsc771017@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:369-373
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The inactivation of oyster-associated bacteria was investigated in order to explore the feasibility of oyster by dense phase carbon dioxide process. The process parameters were optimized by neural network and the neural network model was established. The results showed that when the temperature was (50±5)°C, significant bacteria inactivation effect was observed with low pressure and short time of DPCD treatment. When the temperature was lower than 45°C, temperature and pressure had significant effect on the bacteria inactivation of oyster. However, when the temperature was over 45°C, temperature, pressure and time had no significant effect on the bacteria inactivation of oyster. Exposing oysters to CO
Number of references:19
Main heading:Neural networks
Controlled terms:Bacteria - Carbon - Carbon dioxide - Carbon dioxide process - Optimization - Pressure effects - Shellfish - Sterilization (cleaning)
Uncontrolled terms:Bacteria inactivation - Bacterial count - Dense phase carbon dioxide - Low pressures - Neural network model - Oyster - Process parameters - Theoretical basis
Classification code:921.5 Optimization Techniques - 822.2 Food Processing Operations - 804.2 Inorganic Compounds - 931.1 Mechanics - 804 Chemical Products Generally - 461.9 Biology - 461.1 Biomedical Engineering - 534.2 Foundry Practice
DOI:10.3969/j.issn.1002-6819.2011.12.069
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603024
Title:Effects of ryegrass incorporation on CH
Authors:Zhu, Bo (1); Yi, Lixia (1); Hu, Yuegao (1); Zeng, Zhaohai (1); Tang, Haiming (2); Xiao, Xiaoping (2); Yang, Guangli (2)
Author affiliation:(1) College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; (2) Hunan Soil and Fertilizer Institute, Changsha 410125, China
Corresponding author:Zeng, Z.(zengzhaohai@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:12
Issue date:December 2011
Publication year:2011
Pages:241-245
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Ryegrass-double rice rotation is an important cropping system and commonly adopted in Southern China. However, the effects of ryegrass incorporation on CH
Number of references:26
Main heading:Metabolism
Controlled terms:Global warming - Greenhouse gases - Methane - Nitrogen - Nitrogen fertilizers - Urea
Uncontrolled terms:Cropping systems - Double rice - Global warming potential - Paddy soils - Rice paddy - Ryegrass - Southern China
Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 461.9 Biology - 522 Gas Fuels - 804 Chemical Products Generally - 804.1 Organic Compounds
DOI:10.3969/j.issn.1002-6819.2011.12.045
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602986
Title:Parameter optimization of interlink covering device in relay-cropping system
Authors:Gou, Wen (1); Ma, Rongchao (1); Fan, Gaoqiong (1); Yang, Wenyu (1); Liu, Lin (1); Lei, Xiaolong (1)
Author affiliation:(1) College of Information and Engineering Technology, Sichuan Agricultural University, Ya'an Sichuan 625014, China
Corresponding author:Ma, R.(mycao@sicau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:33-37
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In view of the soil covering demand when wheat no-tillage seeder seed wheat in the hilly area of southwest, the experiment about wheat seeding of interlink covering device was carried out with central composite experiment design. Meanwhile, the mathematical model between covering acceptability and external diameter, serial thickness, serial width was established. The optimal structure parameters of interlink covering device were obtained by response surface analysis. The results indicated that the covering acceptability reached 98.07% when the external diameter was 150 mm, and the serial thickness and width were 9 and 16 mm respectively. The practice shows that the optimization scheme is feasible and provides a theoretical basis for the improved design of wheat no-tillage seeder in the southwest region.
Number of references:15
Main heading:Structural optimization
Controlled terms:Agricultural machinery - Agriculture - Experiments - Machine design - Mathematical models - Models - Optimization - Surface analysis
Uncontrolled terms:Central composite - Experiment design - Hilly areas - Interlink covering device - No tillage - Optimal structures - Optimization scheme - Parameter optimization - Relay-cropping system - Response surface analysis - Response Surface Methodology - Theoretical basis - Wheat seeding
Classification code:951 Materials Science - 921.5 Optimization Techniques - 921 Mathematics - 902.1 Engineering Graphics - 901.3 Engineering Research - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 601 Mechanical Design - 423 Non Mechanical Properties and Tests of Building Materials
DOI:10.3969/j.issn.1002-6819.2011.12.007
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603027
Title:Concentration and determination of composition of biogas slurry
Authors:Song, Chengfang (1); Shan, Shengdao (1); Zhang, Miaoxian (1); Wen, Xianhong (1)
Author affiliation:(1) School of Environmental Science and Technology, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
Corresponding author:Shan, S.(shanshd@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:256-259
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This study provided the basic data for developing biopesticide and biofertilizer for exploiting biogas slurry, ultrafiltration technology by first used to concentrate Biogas slurry, and the composition concentrated liquor of to do a comprehensive analysis. Experiment, biogas slurry through the Ultra-filtration membrane under ordinary pressure., he concentrated liquor was produced by cycle concentrated.Wo have analyzed Physical and chemical characteristics of biogas slurry, heavy metal content and volatilization composition of concentrated liquor were determinated.there were abundant nutriments in concentrated liquor, And heavy metal content of less than the standard limit.The volatilization of oncentrated liquor by a alcohol and alkyl and fat.This result can provide the base for the technology research on high value application of biogas slurry.
Number of references:14
Main heading:Biogas
Controlled terms:Chemical analysis - Concentration (process) - Heavy metals - Microfiltration - Ultrafiltration
Uncontrolled terms:Bio fertilizers - Biogas slurry - Biopesticides - Compositing - Comprehensive analysis - Heavy metal contents - Physical and chemical characteristics - Technology research - Ultra-filtration membranes - Ultrafiltration technology
Classification code:522 Gas Fuels - 531 Metallurgy and Metallography - 801 Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2011.12.048
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603043
Title:Comparison of grain yield prediction methods in land use planning
Authors:He, Wenchao (1); Shi, Xueyi (1); Deng, Qingyun (1); He, Hao (1)
Author affiliation:(1) College of Land Science and Technology, China University of Geosciences, Beijing 100083, China
Corresponding author:Shi, X.(shiyueyi60@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:348-352
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the ways of increasing grain yield prediction accuracy in land use planning, related data of grain yield was analyzed between 1988 to 2005 in Jincheng, and the linear regression model, gray GM (1, 1) model and gray-multiple linear regression model was compared. Firstly, using grey incidence analysis, factors affecting the grain yield were sorted. Secondly, based on the grey incidence analysis, main factors were selected. Thirdly, through gray GM (1, 1) model, the predictive value of main factors was calculated. At the same time, the multiple linear regression model was also constructed using original data. The last, taking predictions of gray GM (1, 1) model as input value, gray-multiple linear regression model was constructed. The result showed that gray-multiple linear regression model had higher prediction accuracy than linear regression model and gray GM (1, 1) model, it was the most appropriate model to forecast the grain yield in Jincheng. The research could improve the scientific of establishment in land use planning.
Number of references:17
Main heading:Linear regression
Controlled terms:Forecasting - Information theory - Land use - Models - Planning - System theory
Uncontrolled terms:Appropriate models - GM (1 , 1) model - Grain yield - Grey incidence analysis - Input values - Jincheng - Land Use Planning - Linear regression models - Multiple linear regression models - Multiple linear regressions - Prediction accuracy - Predictive values
Classification code:403 Urban and Regional Planning and Development - 716.1 Information Theory and Signal Processing - 902.1 Engineering Graphics - 922.2 Mathematical Statistics - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2011.12.065
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603038
Title:Method for quality evaluation of supplementary cultivated land on urban and rural construction land changes
Authors:Bian, Zhenxing (1); Yu, Miao (2); Wang, Qiubing (1); Zhang, Meiyu (1)
Author affiliation:(1) Land and Environmental College, Shenyang Agricultural University, Shenyang 110866, China; (2) College of Science, Shenyang Agricultural University, Shenyang 110866, China
Corresponding author:Wang, Q.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:318-323
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on the achievements of farmland classification, the paper researched on quality evaluation method of supplementary cultivated land on the connection with urban construction land increase and rural construction land decrease. Firstly, it was the quality evaluation program of supplementary cultivated land established, which included the special planning stage, the project planning stage and the cultivated land supplement stage. Secondly, series evaluation methods were established that were used to evaluate the supplementary cultivated land in the different program. Such as adjacent cultivated land and threshold limit value methods established in the special stage could set up the supplementary cultivated land natural attributes and target value method in the project planning which evaluated on the supplementary cultivated land grading. Finally, satisfying results were obtained by the demonstration in the connection project of urban construction land increase and rural construction land decrease in Shenbei district.
Number of references:14
Main heading:Quality control
Controlled terms:Classification (of information) - Construction - Land use
Uncontrolled terms:Cultivated lands - Evaluation Method - Planning stages - Project planning - Quality evaluation - Quality evaluation method - Rural constructions - Target values - Threshold limit values - Urban and rural construction - Urban construction
Classification code:403 Urban and Regional Planning and Development - 405 Construction Equipment and Methods; Surveying - 716.1 Information Theory and Signal Processing - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2011.12.060
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603013
Title:Improved algorithm of near-field beamforming for sound source identification
Authors:Chu, Zhigang (1); Yang, Yang (2)
Author affiliation:(1) State Key Laboratory of Mechanical Transmission, College of Mechanical Engineering, Chongqing University, Chongqing 400044, China; (2) Automotive College of Tongji University, Shanghai 201804, China
Corresponding author:Chu, Z.(zgchu@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:12
Issue date:December 2011
Publication year:2011
Pages:178-183
Language: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 sound source identification performance of near-field beamforming and the calculation accuracy of maximum sound pressure contribution on the array plane, the influence of array microphone signal amplitude correction to acoustical imaging and sound source identification was analyzed by using the cross-spectra beamforming algorithm with auto-spectra exclusion based on the assumption of spherical wave. The results indicated that the calculation accuracy of the maximum sound pressure contribution on the array plane was improved, and some shortages such as the increase of the maximum side-lobe level and the reduction of the dynamic range were come out in the meantime. Ulteriorly, the improved near-field beamforming algorithm for the calculation of the sound pressure contribution on the array plane was put forward. Both results of simulation and the experiments showed that the improved algorithm could calculate the maximum sound pressure contribution accurately, and the dynamic range was increased 1.0-1.6 dB. Finally, the acoustical sealed performance test for a car was carried out by using the improved algorithm. The weak positions of the acoustical seal were identified precisely.
Number of references:13
Main heading:Beamforming
Controlled terms:Acoustic generators - Acoustic imaging - Algorithms - Microphones - Spectroscopy - Ultrasonics
Uncontrolled terms:Amplitude correction - Beamforming algorithms - Calculation accuracy - Cross spectra - Dynamic range - Improved algorithm - Microphone signals - Microphones array - Near-field - Performance tests - Side lobes - Sound pressures - Sound source identification - Spherical waves
Classification code:801 Chemistry - 753.1 Ultrasonic Waves - 752.4 Acoustic Generators - 752.1 Acoustic Devices - 921 Mathematics - 746 Imaging Techniques - 731 Automatic Control Principles and Applications - 723 Computer Software, Data Handling and Applications - 713 Electronic Circuits - 732 Control Devices
DOI:10.3969/j.issn.1002-6819.2011.12.034
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603010
Title:Soil moisture data assimilation based on NDVI optimization
Authors:Wang, Jinliang (1); Qin, Qiming (1); Liu, Mingchao (1); Zhu, Lin (2)
Author affiliation:(1) Institute of Remote Sensing and Geographic Information System, Peking University, Beijing 100871, China; (2) National Satellite Meteorological Center, Beijing 100081, China
Corresponding author:Qin, Q.(qmqin@pku.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:161-167
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Soil moisture could be better estimated through assimilation at various observations into ecosystem models to use all sources of information well. However, different assimilation results could be got from different observations. And the results might have big differences. Three different remote sensed surface soil moisture derived from MODIS red, near infrared and shortwave infrared bands was assimilated to initialize the soil moisture in BEPS (boreal ecosystem production simulator) in May to July in 2008, taking Guguan city in Ningxia as a case. Three different drought indexes PDI (perpendicular drought index), SPSI (shortwave infrared perpendicular water stress index) and MPDI (modify perpendicular drought index) to derive the surface soil moisture were chose based on the time-series NDVI (normalized difference vegetation index) threshold. An Ensemble Kalman Filter was used to perform the data assimilation. The in-situ sites' observations were used to verify the assimilation results which were got from three different remote sensed results. It was demonstrated that the method of remote sensed soil moisture assimilation could help to improve the results in BEPS model. And the assimilation using accurate remote sensed result as observation in different time series could help to improve the soil moisture results.
Number of references:26
Main heading:Geologic models
Controlled terms:Data processing - Drought - Ecosystems - Optimization - Remote sensing - Soil moisture - Time series
Uncontrolled terms:BEPS - Boreal ecosystems - Data assimilation - Drought indices - Ecosystem model - Ensemble data assimilation - Ensemble Kalman Filter - In-situ - Moisture data - NDVI - Near Infrared - Normalized difference vegetation index - Short wave infrared - Surface soil moisture - Water stress
Classification code:921.5 Optimization Techniques - 731.1 Control Systems - 723.2 Data Processing and Image Processing - 922.2 Mathematical Statistics - 483.1 Soils and Soil Mechanics - 454.3 Ecology and Ecosystems - 444 Water Resources - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2011.12.031
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602995
Title:V-notch weir system for automatic gauging of flow rate from runoff plots
Authors:Liu, Lin (1); Qu, Liqin (3); Lei, Tingwu (1); Zhao, Jun (2)
Author affiliation:(1) College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (3) School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
Corresponding author:Lei, T.(ddragon@public3.bta.net.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:79-83
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The runoff plot is a useful means for erosion and hydrologic studies, the measurement of flow rate is the main task of observation from runoff plots. A new system capable of automatic measuring of runoff was developed. The system integrated the components of V-notch weir, data logger, device for data storage and transmission. A laboratory flume experiment was conducted to calibration the discharge coefficient of the integrated weir, and to establish the simplified discharge function. The calibration experiment indicated that the simplified discharge function was correlated with data sets, with the determination coefficient 0.98. Moreover, the impact of exist of sediment in the sediment laden water on the estimation of runoff had been discussed. A calibration model to transform the flow rate of sediment-water mixture to flow rate of water was provided. With capability and reliability of high accurate measurements, this system could be used widely on runoff plots for erosion study.
Number of references:17
Main heading:Flow rate
Controlled terms:Anoxic sediments - Calibration - Erosion - Experiments - Hydraulic structures - Measurements - Runoff - Sedimentology - Weirs
Uncontrolled terms:Accurate measurement - Automatic measurements - Automatic measuring - Calibration model - Data logger - Data sets - Data storage - Determination coefficients - Discharge coefficients - Flume experiment - Main tasks - Sediment-laden water - V-notches
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 901.3 Engineering Research - 631 Fluid Flow - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 611 Hydroelectric and Tidal Power Plants - 481.1 Geology - 444.1 Surface Water - 441.1 Dams - 441 Dams and Reservoirs; Hydro Development - 483 Soil Mechanics and Foundations
DOI:10.3969/j.issn.1002-6819.2011.12.016
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603012
Title:Identification and classification of scanned target in forest based on hierarchical cluster
Authors:Wang, Dian (1); Liu, Jinhao (1); Wang, Jianli (1)
Author affiliation:(1) College of Technology, Beijing Forestry University, Beijing 100085, China
Corresponding author:Liu, J.(liujinhao@vip.163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:173-177
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to avoid the incorrect operation of the harvesting head of forest harvester, the range data of the target trees were collected with a laser scanner. The backgrounds of the scanned data were filtered with the filtering algorithm based on principles of corrosion and clustering. Then, the outline of the scanned target was drawn. On the assumption that all cross sections of the target trees were standard circulars, then the radiuses of them were calculated with the least square method and the mean error of which was less than 4.29 mm. At last, a kind of clustering method based on multivariate statistical analysis was used to classify the calculated results, so the target trees and the large obstacles could be classified based on hierarchical cluster. The final experimental result showed that the method could distinguish the target trees with radius smaller than 384 mm and the large obstacles with calculated radius larger than 774 mm effectively.
Number of references:17
Main heading:Least squares approximations
Controlled terms:Cluster analysis - Forestry - Harvesting - Hierarchical systems - Multivariant analysis - Statistical methods
Uncontrolled terms:Clustering methods - Cross section - Filtering algorithm - Hierarchical clusters - Laser measurement - Laser scanner - Least square methods - Least-square fitting - Mean errors - Multivariate statistical analysis - Range data
Classification code:821.0 Woodlands and Forestry - 821.3 Agricultural Methods - 921.6 Numerical Methods - 922 Statistical Methods - 922.2 Mathematical Statistics - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2011.12.033
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603002
Title:Variations of surface albedo and its diurnal asymmetry at different growing stages of spring wheat in arid areas
Authors:Zhang, Yafeng (1); Wang, Xinping (1); Pan, Yanxia (1); Hu, Rui (1)
Author affiliation:(1) Shapotou Desert Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Corresponding author:Wang, X.(xpwang@lzb.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 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:Surface albedo greatly affects the radiation energy balance of the cropland and is a significant factor in crop growth monitoring and yields estimation. The research aimed to explore the variations of surface albedo with the transitions of different growing stages of spring wheat and analyze the diurnal asymmetry of surface albedo and its causing factor. Diurnal albedo variations were measured at different growing stages (tillering, jointing, heading, filling and maturity) of spring wheat by using a pyranometer. Results indicated that the daily mean surface albedo showed an increasing tendency during tillering to heading but decreased after heading. Surface albedos were much higher in the morning than its corresponding values of the same solar elevation angles in the afternoon when solar elevation angle was less than 40°, indicating a diurnal asymmetry of surface albedo. However, surface albedos showed less difference between forenoon and afternoon when solar elevation angle was greater than 40°. Dew droplets on the leaf surface in the morning were assumed to be the main causing factor for the diurnal albedo asymmetry of spring wheat. The study is expected to provide a reference for precisely specifying surface albedo and further monitoring crop growth using surface albedo in arid areas.
Number of references:28
Main heading:Solar radiation
Controlled terms:Arid regions - Crops - Growth (materials) - Monitoring - Radio communication
Uncontrolled terms:Arid area - Crop growth - Diurnal asymmetry - Leaf surfaces - Pyranometers - Radiation energy - Solar elevation - Spring wheat - Surface albedo
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 951 Materials Science - 821.4 Agricultural Products - 657.1 Solar Energy and Phenomena - 444 Water Resources - 443 Meteorology - 716.3 Radio Systems and Equipment
DOI:10.3969/j.issn.1002-6819.2011.12.023
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603051
Title:Effects of puffing temperature on drying characteristics of winter jujube by explosion puffing drying at variable temperature and pressure
Authors:He, Xinyi (1); Cheng, Lili (1); Liu, Jinfu (1); Huang, Shouen (4); Wang, Bujiang (1)
Author affiliation:(1) Department of Food Science, Tianjin Agricultural University, Tianjin 300384, China; (2) Tianjin Agricultural Products Processing Scientific Innovation and Achievement Transform Base, Tianjin 300384, China; (3) College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei 230036, China; (4) College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Corresponding author:He, X.(hedevid@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:389-392
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 investigate the moisture content change theory and obtain the drying kinetics model of winter jujube by explosion puffing drying at variable temperature and pressure difference. Effects of different puffing temperature on drying characteristics of winter jujube by explosion puffing drying at variable temperature and pressure difference were investigated. The drying kinetics model of winter jujube was founded. Results showed that the explosion puffing drying process of winter jujube occurred in rising-rate, constant-rate and falling-rate period. When the moisture content was about 50%, the drying process was in constant-rate constant period. And the drying process was in falling-rate period when the moisture content was 40%. Most of drying process was in falling-rate period. Henderson and Pabis model provided better simulation of drying curves for winter jujube at different puffing drying temperature. This research can predict the relationship between explosion puffing drying time and moisture content change, and provide a technical basis for controllable industrialization production of explosion puffing drying at variable temperature and pressure difference for winter jujube.
Number of references:16
Main heading:Drying
Controlled terms:Computer simulation - Enzyme kinetics - Explosions - Explosives - Kinetics - Moisture - Moisture determination - Plants (botany) - Rate constants - Temperature
Uncontrolled terms:Change theory - Drying characteristics - Drying curves - Drying kinetic - Drying process - Drying temperature - Drying time - Falling-rate period - Pressure differences - Variable temperature - Winter jujube
Classification code:931 Classical Physics; Quantum Theory; Relativity - 804 Chemical Products Generally - 801.4 Physical Chemistry - 723.5 Computer Applications - 944.2 Moisture Measurements - 642.1 Process Heating - 502.1 Mine and Quarry Operations - 461.9 Biology - 461.8 Biotechnology - 641.1 Thermodynamics
DOI:10.3969/j.issn.1002-6819.2011.12.073
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603029
Title:Effects of different pretreatments on efficiency of anaerobic digestion of switchgrass
Authors:Yang, Fuyu (1); Ding, Cuihua (1); Li, Lianhua (2); Zhang, Yunwei (1); Zang, Yanyun (1); Sun, Yongming (2); Kong, Xiaoying (2); Li, Dong (2)
Author affiliation:(1) Grassland Institute, China Agricultural University, Beijing 100193, China; (2) Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, 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:12
Issue date:December 2011
Publication year:2011
Pages:264-268
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The objective of the research was to investigate effects of pretreatments of microwave, steam heating and adding sodium hydroxide on crystallinity and fiber structure of switchgrass. All treatments could decrease crystallinity of raw materials. Neutral detergent fiber, acid detergent fiber and lignin contents decreased when pretreatment of microwave and adding sodium hydroxide (NaOH) were used. Crude fat content also declined by adding sodium hydroxide. There was no difference on biogas production (28486 and 28686 mL) and the biogas production rate (453.60 and 456.79 mL/g) between untreated material and steam heated material. The anaerobic digestion decreased by adding sodium hydroxide because of high ratio of C/N, toxic effects of cationic and inhibitor. The results showed that all treatment could decrease contents of fiber of Panicum virgatum, but could not improve the anaerobic digestion.
Number of references:19
Main heading:Anaerobic digestion
Controlled terms:Agricultural wastes - Biogas - Biological materials - Biomaterials - Fibers
Uncontrolled terms:Acid detergent fiber - Biogas production - Crude fat - Crystallinities - Fiber structures - Heated material - Investigate effects - Lignin contents - Neutral detergent fiber - Panicum virgatum - Pre-Treatment - Pre-treatments - Sodium hydroxides - Switchgrass - Toxic effect
Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 462.5 Biomaterials (including synthetics) - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 821.5 Agricultural Wastes
DOI:10.3969/j.issn.1002-6819.2011.12.050
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602999
Title:Dynamic simulation of leaf area and dry matter production of greenhouse cucumber under different electrical conductivity
Authors:Ni, Jiheng (1); Mao, Hanping (1)
Author affiliation:(1) Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang 212013, 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:12
Issue date:December 2011
Publication year:2011
Pages:105-109
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Electrical conductivity (EC) is an important parameter of nutrient solution management. In order to investigate the effects of EC on photosynthesis rate and dry matter production of greenhouse cucumber, experiment of greenhouse cucumber with different EC was conducted in greenhouse of Jiangsu University from September 2009 to July 2010. Effect of different EC on leaf area, maximum photosynthesis rate and dry matter production were quantitative analyzed. A simulation model based on thermal and photosynthetically active radiation was founded. Independent experimental data were used to validate the model. The results showed that the coefficient of determination between simulated and measured values of leaf area index, maximum photosynthesis rate and dry matter production based on the 1:1 line were 0.89, 0.93 and 0.94, respectively. And root mean squared error between the simulated and measured values were 0.21 m2/m2, 1.52 μmol/(m2·s) and 36.77 kg/hm2, respectively. Relative error between the simulated and measured values were 4.5%, 11% and 9.2%, respectively. The model could be used for optimizing nutrient solution management for greenhouse cucumber.
Number of references:16
Main heading:Computer simulation
Controlled terms:Dynamics - Electric conductivity - Greenhouses - Nutrients - Photosynthesis
Uncontrolled terms:Coefficient of determination - Dry matter production - Electrical conductivity - Experimental data - Greenhouse cucumbers - Leaf area - Leaf Area Index - Nutrient solution - Photosynthesis rate - Photosynthetically active radiation - Relative errors - Root mean squared errors - Simulation model
Classification code:402.1 Industrial and Agricultural Buildings - 701.1 Electricity: Basic Concepts and Phenomena - 723.5 Computer Applications - 741.1 Light/Optics - 821.2 Agricultural Chemicals - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2011.12.020
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603035
Title:Steam exploded pretreatment and enzymatic hydrolysis of bamboo for fermentable monosaccharides
Authors:Zhu, Li (1); Shao, Qianjun (1); Zhao, Yunfeng (1); Ma, Junjun (1); Liu, Jianjun (1)
Author affiliation:(1) School of Engineering, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
Corresponding author:Shao, Q.(shawqj@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:302-306
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Bamboo is a kind of high biomass plants. It can be used as important raw material for bio-energy production. Pretreatment is the key technology for the production of cellulosic ethanol. Enzymatic hydrolysis experiments were conducted using the steam exploded pretreated Bambusa multiplex bamboo and Bambusa wenchouensis bamboo. The fermentable sugars were determined from the hydrolyzate and pretreatment filtrate solution by high performance liquid chromatography (HPLC). The results showed that the treatment of pre-soaked in 0.5% sulfuric acid could increase the total sugar yield by 49% compared with non-soaked; the strength of steam exploded pretreatment effected enzymatic conversion significantly, which reached the highest conversion rate of pretreated solids when strength index was 3.35, and the highest total sugars yield obtained when strength index was 3.65. 289.5 g fermentable monosaccharides were got from 1000 g bamboo of dry basis. It is very important for accurately predicting the yield of sugars from steam exploded pretreated biomass through mass balance because the polysaccharide can be decomposed into the filtrate and the monosaccharide can be decomposed. The hydrolysis conversion of steam exploded treated bamboo is less than corn stover, for the bamboo has more lignin and more dense microstructure.
Number of references:18
Main heading:Enzymatic hydrolysis
Controlled terms:Bamboo - Biomass - Cellulosic ethanol - Ethanol - Filtration - Glucose - High performance liquid chromatography - Steam - Sulfuric acid
Uncontrolled terms:Bio-energy - Biomass plants - Conversion rates - Corn stover - Enzymatic conversions - Fermentable sugars - Key technologies - Mass balance - Pre-Treatment - Strength indexes - Sugar yield
Classification code:804.2 Inorganic Compounds - 804.1 Organic Compounds - 802.3 Chemical Operations - 821.4 Agricultural Products - 802.2 Chemical Reactions - 525.1 Energy Resources and Renewable Energy Issues - 523 Liquid Fuels - 614 Steam Power Plants
DOI:10.3969/j.issn.1002-6819.2011.12.057
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603007
Title:Silverlight-based satellite images querying system with multi-tier architecture
Authors:Miao, Yu (1); Jiang, Nan (1); Lü, Heng (1); Hu, Bin (1); Cao, Fangdong (1); Xuan, Yong (4)
Author affiliation:(1) School of Geographical Science, Nanjing Normal University, Nanjing 210046, China; (2) Key Laboratory of VGE, Ministry of Education, Nanjing Normal University, Nanjing 210046, China; (3) Bureau of Land and Resources of Chuzhou, Chuzhou 239000, China; (4) National Disaster Reduction Center of China, Beijing 100124, China
Corresponding author:Jiang, N.(njiang@njnu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:146-151
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With the increasing demand for querying images, the traditional Web querying system of remote sensing images can not meet the needs because of its shortcomings, including weak user interaction capabilities, slow responding speed of the server, and the poor offline operation ability. Furthermore, it is known that traditional querying system does not concern the needs of crops remote sensing monitoring. So a new satellite images querying system was set up based on Silverlight technology using LINQ and WCF technologies with a thought of multi-tier architecture, which can be applied easily to monitor crops growing via remote sensing. In this system, two fast-querying algorithms of both orbit-fixed and orbit-varied satellites were advocated, which not only can improve the system efficiency, but also enhance the system offline operation ability. The results show that, System response time shorter than the traditional system by 25%, meanwhile can reduce the server load. In conclusion, the new querying system has the ability of dealing with concurrent access by a large number of users in the same time. The system has good application prospects in fast Query of remote sensing images, agricultural condition monitoring and crop yield estimation.
Number of references:23
Main heading:Condition monitoring
Controlled terms:Algorithms - Crops - Image reconstruction - Remote sensing - Satellites
Uncontrolled terms:Agricultural conditions - Application prospect - Concurrent access - Crop yield - Fast query - Images - Multi tier architecture - New satellites - Offline - Querying systems - Remote sensing images - Remote sensing monitoring - Satellite images - Search Algorithms - Server loads - Silverlight - System efficiency - System response time - Traditional systems - User interaction - Web querying
Classification code:821.4 Agricultural Products - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 921 Mathematics - 723 Computer Software, Data Handling and Applications - 655.2 Satellites - 603 Machine Tools - 706 Electric Transmission and Distribution
DOI:10.3969/j.issn.1002-6819.2011.12.028
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603023
Title:Effects of waterfowl sewage treatment by integrated artificial wetland running for 2 years
Authors:Cui, Lijuan (1); Li, Wei (1); Zhang, Manyin (1); Zhao, Xinsheng (1); Zhang, Yan (1); Wang, Yifei (1)
Author affiliation:(1) Research Institute of Wetland, Chinese Academy of Forestry, Beijing 100091, China
Corresponding author:Cui, L.(lkyclj@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:234-240
Language: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 integrated artificial wetland was constructed by surface and subsurface wetland to dispose the effect of eutrophication caused by waterfowl. The removal efficiencies of chemical oxygen demand (COD
Number of references:33
Main heading:Wetlands
Controlled terms:Chemical oxygen demand - Effluents - Eutrophication - Integration - Nitrogen - Nitrogen removal - Oxygen - Phosphorus - Sewage - Sewage treatment - Water treatment
Uncontrolled terms:Artificial wetland - Constructed wetlands - Effluent concentrations - Eutrophic water - Integrated constructed wetland - Linear correlation - Northern China - Removal efficiencies - Removal rate - Runtimes - Seasonal effects - Subsurface wetlands - Surface wetland - Surface wetlands - Total nitrogen - Total phosphorus - Total suspended solids
Classification code:804 Chemical Products Generally - 802.2 Chemical Reactions - 453.1 Water Pollution Sources - 921.2 Calculus - 453 Water Pollution - 445.1 Water Treatment Techniques - 442.2 Land Reclamation - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal
DOI:10.3969/j.issn.1002-6819.2011.12.044
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603006
Title:Method of plant leaf recognition based on weighted locally linear embedding
Authors:Zhang, Shanwen (1); Wang, Xianfeng (1)
Author affiliation:(1) Department of Engineering and Technology, Xijing University, Xi'an 710123, China; (2) Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China
Corresponding author:Zhang, S.(wjdw716@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:141-145
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Locally linear embedding (LLE) is a classical and effective manifold learning method, which can project the original samples into a low dimensional space by preserving the least reconstructed weights among the neighbor points. But LLE is very sensitive to noisy points and outliers. In order to improve the robust of LLE, a weighted LLE (WLLE) algorithm was proposed in this paper. The importance score of each point was obtained by the heat kernel function. The importance scores were then added into the cost function of WLLE. The undesirable effect resulted by the noisy points and outliers on the embedding result can be largely reduced. The experimental results based on the real-world plant leaf databases show the effectiveness and feasible of the proposed method.
Number of references:19
Main heading:Statistics
Controlled terms:Image recognition
Uncontrolled terms:Heat kernel - Locally linear embedding - Low-dimensional spaces - Manifold learning - Noisy point - Original sample - Plant leaf - Undesirable effects - Weighted LLE
Classification code:716 Telecommunication; Radar, Radio and Television - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2011.12.027
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603026
Title:Air-dried sweet sorghum stalk for long-term storage and ethanol fermentation
Authors:Shen, Fei (1); Mei, Xiaoyan (2); Cao, Weixing (3); Liu, Ronghou (3)
Author affiliation:(1) College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China; (2) Liaoning Institute of Managerial Staff, Shenyang 110161, China; (3) Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author:Liu, R.(liurhou@sjtu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:250-255
Language: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 air-dried sweet sorghum stalk was employed for a long-term storage to prolong the raw material supply for ethanol production. The change of sugar content in the stalk was investigated in the drying and the storage process, respectively. Results indicated that the total sugar loss during the drying process was 4.58%, when the moisture of fresh stalk decreased from 80% to 18%. In the subsequent 6 months storage duration, the total sugar and reducing sugar in the dried stalk almost kept no obvious decrease when the stalk moisture was lower than 22%. The 'safe moisture' for dried sweet sorghum long-term storage could be thereby regarded as 22%. After 6 months storage, the dried stalk was rehydrated for fermentation to check the fermentability. Results showed fermentation could be rapidly completed in 24 h and ethanol concentration in substrate could reach 67.06 mg/g (wet basis). There were no obvious inhibitions in the fermentation process. According to the results above, it was an effective way to store sweet sorghum stalk for a long time by air-drying stalk. This work could give a potential solution to the shortage of raw material supply in the year-round ethanol production from sweet sorghum stalk.
Number of references:22
Main heading:Storage (materials)
Controlled terms:Drying - Ethanol - Fermentation - Moisture - Sugars
Uncontrolled terms:Drying process - Ethanol concentrations - Ethanol fermentation - Ethanol production - Fermentability - Fermentation process - Long-term storage - Potential solutions - Raw material supply - Reducing sugars - Sugar content - Sugar loss - Sweet sorghum
Classification code:642.1 Process Heating - 694.4 Storage - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds
DOI:10.3969/j.issn.1002-6819.2011.12.047
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602996
Title:Effects of drip irrigation patterns on soil properties in cotton field
Authors:Zai, Songmei (1); Wu, Feng (1); Fan, Yongshen (1); Wen, Ji (1); Han, Qibiao (1); Sun, Hao (1)
Author affiliation:(1) Farmland Irrigation Research Institute, CAAS, Xinxiang 453003, China; (2) College of Hydraulic Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
Corresponding author:Wu, F.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:84-89
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:To investigate long-term impacts of drip irrigation on soil properties, fields sampling were adapted in the cotton field after 8 years fertigation with mulched drip irrigation (MDI) and subsurface drip irrigation (SDI) in Xinjiang, Northwest China. Results showed that soil bulk density at 10 cm was relatively higher in MDI, while higher soil bulk density of soil layers appears at 60 cm in SDI field. For soil EC, it had a slight lower in shallower soil layers and a significantly higher from 20 to 100 cm in MDI than that in SDI. The average soil EC value from 0 to 100 cm soil layer in MDI was 19.2% higher. The soil PH value in SDI was lower in shallower soil layers, and the residual of soil nitrogen was less than that in MDI. The differences of soil available P's and soil available K's content were not significant under two fertigation methods.
Number of references:15
Main heading:Soils
Controlled terms:Cotton - Forestry - Irrigation - Nutrients - pH - Subirrigation
Uncontrolled terms:Available P - Drip irrigation - Fertigations - NorthWest China - Soil bulk density - Soil EC - Soil layer - Soil nitrogen - Soil pH - Soil PH value - Soil property - Soil salinity - Subsurface drip irrigation - Xinjiang
Classification code:483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2011.12.017
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603036
Title:Quality evaluation of farmland and fertilization management in Fuyang county
Authors:Wu, Haoxiang (1); Jiang, Yugen (2); Zhang, Jiantao (3); Shi, Zhou (3)
Author affiliation:(1) Department of Land Management, Zhejiang University, Hangzhou 310029, China; (2) Fuyang Agriculture Bureau, Fuyang 311000, China; (3) Department of Natural Resource Sciences, Zhejiang University, Hangzhou 310058, China
Corresponding author:Shi, Z.(shizhou@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:12
Issue date:December 2011
Publication year:2011
Pages:307-312
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:In order to upgrade the efficiency of fertility level information of farmland in agricultural production, it is indispensable to use cross analysis and integrative application with evaluation of farmland productivity and formula fertilization based on soil-testing. This paper was to investigate the application of Analytic Hierarchy Process (AHP) in soil fertility assessment and its classification, so as to make a comprehensive evaluation of farmland fertility in Fuyang county in China. In order to provide technical support for the scientific fertilizers, chosing GIS as spatial data analysis tool, chosing current farmland utilization map (1:10,000) as the evaluation unit, using AHP to select weight value, the score of each evaluation unit with the cumulative method was calculated. Results show that 80.92% of the total farmland belongs to the second or third level; and there is only 5.59% low-yield farmland among all the agricultural land in Fuyang. The overall quality of farmland of Fuyang is in good condition. And there exists strong advantage in agricultural production in Fuyang. Besides, the new fertilization plan provided by this research is better than the previous fertilization recommendation.
Number of references:16
Main heading:Quality control
Controlled terms:Farms - Fertilizers - Geographic information systems - Hierarchical systems - Land use - Soil testing
Uncontrolled terms:Agricultural land - Agricultural productions - Comprehensive analyze - Comprehensive evaluation - Farmland - Fertility level - Geographic information - Low-yield - Overall quality - Quality evaluation - Soil fertility - Spatial data analysis - Technical support - Third level - Weight values
Classification code:961 Systems Science - 913.3 Quality Assurance and Control - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 723.3 Database Systems - 483.1 Soils and Soil Mechanics - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2011.12.058
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603022
Title:Numerical simulation of heat supply for heat recovery ventilation system of piggery in winter
Authors:Wang, Xiaochao (1); Chen, Zhaohui (1); Wang, Meizhi (1); Liu, Jijun (1)
Author affiliation:(1) College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (2) State Key Laboratory of Animal Nutrition, Beijing 100193, China
Corresponding author:Liu, J.(liujijun@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:227-233
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To study the effect of different air inlet angels of heat recovery ventilation system on the heating of the swine pens, the air temperature field and airflow field in the empty swine pens were numerically simulated based on computational fluid dynamics and theoretical model was validated with experiments. The experimental results showed that simulated and experimental results had the higher fitting degree and the theoretical model was reasonable. And when the ventilation rate of swine pens was met the requirement of, air temperature field and airflow field were numerically simulated with different air inlet angel (30°, 45° and 60°) of the heat recovery ventilation system based on above model. The results showed that compared with both 30° and 60° air inlet angel, the air temperature was more even and fresh air was mixed more sufficiently inside the swine pens with the 45° air inlet angel, which met the growth requirement of pigs. It can provide a reference for application of heat recovery ventilation system in pig production.
Number of references:21
Main heading:Ventilation
Controlled terms:Air - Air intakes - Atmospheric temperature - Computational fluid dynamics - Computer simulation - Dynamics - Heating - Recovery - Waste heat - Waste heat utilization
Uncontrolled terms:Air flow fields - Air inlet - Air supply - Air temperature - Air temperature fields - Computational fluid - Fitting degree - Fresh air - Heat supply - Pig production - Swine pens - Theoretical models - Ventilation rate - Ventilation systems
Classification code:804 Chemical Products Generally - 723.5 Computer Applications - 643.5 Ventilation - 931.1 Mechanics - 643.1 Space Heating - 531 Metallurgy and Metallography - 443.1 Atmospheric Properties - 631.1 Fluid Flow, General
DOI:10.3969/j.issn.1002-6819.2011.12.043
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603048
Title:Flavor identification of fish sauce based on electronic nose
Authors:Jiang, Jinjin (1); Chen, Lihua (2); Li, Haibin (1); Zeng, Qingxiao (3)
Author affiliation:(1) Guangzhou Polytechnic, Guangzhou, 510405, China; (2) Shanghai Institute of Technology, Shanghai 200235, China; (3) College of Food and Light Industry, South China University of Technology, Guangzhou 510640, China
Corresponding author:Jiang, J.(starjjj@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:374-377
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:In order to discriminate the quality of fish sauce and help to find the best process for shorten fermentation time, electronic nose was used to study the diversity of the flavor of seven fish sauce samples. The conclusion was compared with those of headspace GC-MS and sensory evaluation. The results showed that the volatile compounds of fish sauce were complicated and it could be changed apparently by improving process. The samples could be discriminated through 18 metal oxide sensors of electronic nose. Using original fish sauce as standard, sample 4 which using Koji when fermentation has the most similar flavor with original fish sauce, the similarity coefficient was 87.8%. The result is similar in electronic nose analysis, headspace GC-MS analysis and sensory evaluation. It can provide a reference for improve the process of Chinese fish sauce.
Number of references:15
Main heading:Fish
Controlled terms:Artificial organs - Fermentation - Flavors - Metallic compounds - Principal component analysis - Quality control - Volatile organic compounds
Uncontrolled terms:Electronic NOSE - Fish sauce - Headspace GC-MS - Metal oxide sensors - Principal Components - Sensory evaluation - Similarity coefficients - Volatile compounds
Classification code:922.2 Mathematical Statistics - 913.3 Quality Assurance and Control - 822.3 Food Products - 822 Food Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 471 Marine Science and Oceanography - 462.4 Prosthetics - 461.8 Biotechnology - 461 Bioengineering and Biology - 451.1 Air Pollution Sources
DOI:10.3969/j.issn.1002-6819.2011.12.070
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603033
Title:Analysis of combustion characteristics and boundary condition effects on HCCI engine fueled with ethanol/diesel blends
Authors:Mo, Chunlan (1); Lu, Zhenghui (1); Xu, Mingjiang (1); Huang, Haozhong (1); Luo, Lian (1); Wei, Wei (1)
Author affiliation:(1) College of Mechanical Engineering, Guangxi University, Nanning 530004, China
Corresponding author:Mo, C.(chunlanm@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:12
Issue date:December 2011
Publication year:2011
Pages:291-296
Language: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 engine performance, chemical kinetic mechanisms of diesel and ethanol/diesel blends were studied. The influences of important species, free radicals and the key reactions on homogeneous charge compression ignition (HCCI) engine fueled with ethanol/diesel blends and conventional diesel were compared. The results showed that with the introduction of ethanol in diesel oil, the first O
Number of references:16
Main heading:Addition reactions
Controlled terms:Abstracting - Calculations - Chemical analysis - Diesel fuels - Enzyme kinetics - Ethanol - Ethanol fuels - Free radicals - Ignition - Internal combustion engines - Machine design - Pyrolysis - Reaction kinetics
Uncontrolled terms:Burning process - Chemical kinetic mechanism - Combustion characteristics - Diesel oil - Engine performance - Equivalence ratios - Fuel/air ratio - H-abstraction - HCCI combustion - HCCI engine - Homogeneous charge compression ignition engines - Intake temperature - Key reactions - Performance control
Classification code:903.1 Information Sources and Analysis - 804 Chemical Products Generally - 802.2 Chemical Reactions - 723 Computer Software, Data Handling and Applications - 921 Mathematics - 721 Computer Circuits and Logic Elements - 601 Mechanical Design - 523 Liquid Fuels - 521.1 Fuel Combustion - 612.1 Internal Combustion Engines, General
DOI:10.3969/j.issn.1002-6819.2011.12.055
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603014
Title:Application of 4DVAR and EnKF approaches for assimilating vegetation temperature condition index
Authors:Wang, Wei (1); Liu, Xiangge (1); Wang, Pengxin (1); Liu, Chunhong (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, P.(wangpx@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:184-190
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The objective of this study was to combine the remotely sensed Vegetation Temperature Condition Index (VTCI) and CERES-Wheat model to get high accuracy of drought monitoring results by using two data assimilation approaches, the Four-dimensional Variational (4DVAR) and Ensemble Kalman Filter (EnKF). VTCI was retrieved from remote sensing data (AVHRR) for drought monitoring, and the surface soil moisture was simulated from the CERES-Wheat model using ground survey data and meteorological data in Guanzhong Plain of Shaanxi province. The simulated VTCI values in the study area were achieved by employing the established empirical linear model between retrieved VTCI and soil surface moisture. The assimilation was carried out in the eight sampling sites and the whole study area, respectively. After establishing the assimilation system, the retrieved VTCI values and the simulated ones of the eight sampling sites were used to test the two assimilation approaches. The results showed that the assimilated VTCI values of the sites were more accurate and closer to the real ones. The texture of the assimilated VTCI image of the whole study area was more smooth than that of the retrieved one, and the sudden changes between the adjacent pixels in the assimilated image were reduced compared to those of the retrieved VTCI image. Based on the prior knowledge of the spatial drought occurrence in the study area, the assimilated VTCI values could get a high accuracy of drought monitoring results. After comparing the distributions of the differences and root mean square errors between the two assimilated VTCI values and the retrieved ones in the study area, it can be concluded that the EnKF approach has stronger applicability and higher accuracy than those of the 4DVAR approach.
Number of references:21
Main heading:Data processing
Controlled terms:Computer simulation - Drought - Geologic models - Mean square error - Meteorology - Models - Monitoring - Remote sensing - Soil moisture - Vegetation
Uncontrolled terms:Adjacent pixels - Assimilation system - CERES-Wheat - Data assimilation - Drought monitoring - Ensemble Kalman Filter - Ground surveys - Meteorological data - Prior knowledge - Remote sensing data - Root mean square errors - Sampling site - Soil surfaces - Study areas - Sudden change - Surface soil moisture - Vegetation temperature condition index
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 902.1 Engineering Graphics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 731.1 Control Systems - 723.5 Computer Applications - 723.2 Data Processing and Image Processing - 483.1 Soils and Soil Mechanics - 481.1 Geology - 444 Water Resources - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2011.12.035
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603001
Title:Monitoring and diagnosis system for wheat growth with remote sensing and sensor technology
Authors:Zhang, Qin (1); Huang, Wenjiang (2); Xu, Tongyu (1); Yang, Xiaodong (2); Sun, Peng (1)
Author affiliation:(1) Shenyang Agriculture University, Shenyang 110866, China; (2) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Huang, W.(huangwj@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:115-119
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:The growth status of wheat seedlings is closely related to the latter growth biomass and the yield. Given the fact that the surrounding environment of wheat is variable and highly unpredictable during its growth, monitoring and diagnosing the vigor of winter wheat during the seedling period is of great importance. The study present a preliminary design of a remote monitoring and intelligent diagnosing system based on the combination of remote monitoring, remote sensing and WebGIS technology. The remote monitoring and remote sensing technologies can provide both field environmental information and growth information in real time. In addition, the wheat growth condition, drought and cold injury can be diagnosed and analyzed with the aid of an expert knowledge database. For practical use, the presented system is able to generate a solution for the regulation and management of wheat, which is assumed to benefit the decision making process significantly.
Number of references:15
Main heading:Monitoring
Controlled terms:Crops - Decision making - Growth (materials) - Remote control - Remote sensing
Uncontrolled terms:Cold injury - Decision making process - Diagnosing system - Environmental information - Expert knowledge - Growth conditions - Growth information - Monitoring and diagnosis - Preliminary design - Real time - Remote diagnosis - Remote monitoring - Remote sensing technology - Sensor technologies - Surrounding environment - System construction - Web-GIS - Wheat seedlings - Winter wheat
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 951 Materials Science - 941 Acoustical and Optical Measuring Instruments - 821.4 Agricultural Products - 731.1 Control Systems - 912.2 Management
DOI:10.3969/j.issn.1002-6819.2011.12.022
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603040
Title:Dynamic simulation of land use change in Jihe watershed based on CA-Markov model
Authors:Wang, Yousheng (1); Yu, Xinxiao (1); He, Kangning (1); Li, Qingyun (1); Zhang, Yousong (1); Song, Siming (1)
Author affiliation:(1) Water and Soil Conservation Department, Beijing Forestry University, Beijing 100086, China; (2) Gansu Province Dingxi Agricultural Technology Extensional Station, Dingxi 743000, China
Corresponding author:Yu, X.(yuxinxiao@bjfu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 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:To explore the law of land use change and driving force in Loess hilly-gully area in Jihe watershed, based on the land use data interpretation from remote sensing images in 1995 and 2008, the degree of dynamic change of land use type in Jihe watershed was analyzed by dynamic degree model and spatial analysis model, and distribution of land use spatial patterns in 2022 was forecast by using the CA-Markov model. The results showed that spatial analysis model not only took the conversion process into account but also the spatial expansion process of land use change, so it could more precisely measure the dynamic change rate of land use. The simulation result by the CA-Markov method indicated that, the value of Kappa coefficients of agreement in the whole watershed was 0.9515, and forecasting results were credible. From 2008 to 2022, except for grassland and unused land, trends of land use evolution as well as its rate will keep constant. That is, the area of slope farmland, grassland, water and unused land will continue to reduce in some degree, while terrace, forest land and settlements will present a increasing trend. Because the Loess hilly-gully is a serious soil erosion area, this research is helpful to reinforce the protection of land resource and to enforce the agro-forestry policies of reusing farmland for forestland and grassland, and it is meaningful to serve as a scientific basis for land planning and management.
Number of references:25
Main heading:Land use
Controlled terms:Computer simulation - Data processing - Forestry - Geologic models - Image reconstruction - Landforms - Markov processes - Models - Remote sensing - Spatial variables measurement - Watersheds
Uncontrolled terms:Agroforestry - Conversion process - Data interpretation - Driving forces - Dynamic changes - Forest land - Kappa coefficient - Land planning - Land resources - Land use type - Land-use change - Remote sensing images - Soil erosion - Spatial analysis - Spatial expansion - Spatial patterns
Classification code:922.1 Probability Theory - 902.1 Engineering Graphics - 821.0 Woodlands and Forestry - 731.1 Control Systems - 943.2 Mechanical Variables Measurements - 723.5 Computer Applications - 481.1 Geology - 444.1 Surface Water - 403 Urban and Regional Planning and Development - 723.2 Data Processing and Image Processing
DOI:10.3969/j.issn.1002-6819.2011.12.062
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603016
Title:Effect of biological nature of organic acid exudation from ryegrass on phytoremediation of lead pollution
Authors:Qiao, Dongmei (1); Pang, Hongbin (1); Qi, Xuebin (1); Hu, Chao (1); Zhao, Zhijuan (1); Du, Zhenjie (1); Gao, Qing (1); Fan, Tao (1)
Author affiliation:(1) Farmland Irrigation Research Institute of Chinese Academy of Agricultural Sciences, Xinxiang 453003, China; (2) Agriculture Water and Soil Environmental Field Science Res. Station of Xinxiang City Henan Province, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China; (3) Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China
Corresponding author:Qi, X.(qxb6301@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:12
Issue date:December 2011
Publication year:2011
Pages:195-199
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to reveal the effect of organic acid exudation from root on phytoremediation effects, liquid culture experiment was adopted to study the effect of organic acid on physiological characteristics and Pb2 absorption by ryegrass. It showed that organic acid from ryegrass root were oxalic acid, tartaric acid, malic acid, glacial acetic acid and citric acid. 0.1-1 mmol/L malonic acid and 2-3 mmol/L acetic acid increased the amount of dry matter. 0.1 mmol/L tartaric acid, 0.5-1 mmol/L malonic acid and 2-3 mmol/L acetic acid could increase the patience index. 1-3 mmol/L malonic acid and tartaric acid could increase the accumulation of Pb2 in ryegrass shoot. 1-3 mmol/L glacial acetic acid could increase the biomass liveweight of ryegrass and the accumulation of heavy metal Pb2 in root. The study could provide the certain reference foundation to phytoremediation polluted by heavy metal.
Number of references:13
Main heading:pH
Controlled terms:Acetic acid - Biomass - Bioremediation - Carboxylic acids - Citric acid - Glacial geology - Heavy metals - Lead - Organic acids
Uncontrolled terms:Dry matters - Glacial acetic acid - Lead pollution - Liquid culture - Malic acids - Malonic acid - Organic acid exudation - Oxalic Acid - Physiological characteristics - Phytoremediation - Ryegrass - Tartaric acids - Tolerance indices
Classification code:804.1 Organic Compounds - 801.1 Chemistry, General - 546.1 Lead and Alloys - 531 Metallurgy and Metallography - 525.1 Energy Resources and Renewable Energy Issues - 481.1 Geology - 454.2 Environmental Impact and Protection
DOI:10.3969/j.issn.1002-6819.2011.12.037
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602990
Title:Finite element analysis method of slewing bearing with plastic deformation
Authors:Shang, Zhenguo (1); Dong, Huimin (2); Mao, Fanhai (2); Wang, Hua (3)
Author affiliation:(1) School of Mechanical Engineering, Dalian University of Ocean, Dalian 116023, China; (2) School of Mechanical Engineering, Dalian University of Technology, Dalian 116021, China; (3) Center of Experiment Teaching, Dongbei University of Finance and Economics, Dalian 116025, China
Corresponding author:Shang, Z.(shangzhenguo@dlou.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:52-56
Language: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 gain the interior load distribution and contact stress of the heavy-duty slewing bearing accounting for the supporting structure flexibility and the plastic deformation of the bearing, the contact between the rolling element and the raceway was equivalent to an unidirectional compression spring, and then the whole simplified finite element model combining the bearing with the supporting structure was built. The spring coefficient was determined by the load verse elastic-plastic deformation relationship of the single rolling element that was obtained by finite element contact method. The difference between the traditional Hertz contact results and the FEM results is very obvious for the slewing bearings with plastic deformation, such as contact deflection of the rolling elements and the raceway, load distribution on the rolling elements, stress in the raceway and contact pressure between the rolling elements and the raceway. Therefore, the method based on the Hertz contact mechanics theory is not applicable for the performance analysis of the heavy-duty slewing bearing.
Number of references:16
Main heading:Finite element method
Controlled terms:Bearings (structural) - Plastic deformation
Uncontrolled terms:Contact methods - Contact pressures - Contact Stress - Distribution contact analysis - Elastic-plastic deformation - Finite Element - Finite element analysis method - Finite element models - Hertz contact - Interior loads - Load distributions - Loads - Performance analysis - Rolling elements - Slewing bearings - Spring coefficient - Supporting structure - Unidirectional compression
Classification code:408.2 Structural Members and Shapes - 421 Strength of Building Materials; Mechanical Properties - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2011.12.011
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014602983
Title:Experimental study on pressure of air-blowing precision seed-metering device
Authors:Liu, Jia (1); Cui, Tao (1); Zhang, Dongxing (1); Huang, Shaolu (1); Shi, Song (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Zhang, D.(zhangdx@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:12
Issue date:December 2011
Publication year:2011
Pages:18-22
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Laboratory and field experiments were carried out to determine the appropriate range of work pressure of the air-blowing precision seed-metering device. And the influence of pressure on the qualified index, multiple index and miss index was investigated by single-element analysis of variance. Two devices made of different material were tested in the experiment. The pressure varied from 0.7 to 8 kPa, and field experiment for the same condition repeated. It was observed that the seed-metering device has satisfactory and steady performance with the pressure over 2.5 kPa in laboratory experiment. And the sowing quality gradually turns better with the increase of the pressure. When the pressure gets to 8 kPa, the qualified index is 97.28%. The analysis of variance shows that there is appreciable impact of variation of the pressure on the planting quality. The average qualified index surpasses 90% within the range of 2.5-4.5 kPa. In the field test, the qualified index is 93.18%. The air-blowing precision seed-metering device has superior flexibility on the variation of pressure, low miss index and stable field operation.
Number of references:15
Main heading:Equipment
Controlled terms:Agricultural machinery - Design - Experiments - High pressure effects - Pneumatic materials handling equipment - Pressure - Quality control - Seed
Uncontrolled terms:Experimental studies - Field experiment - Field test - Laboratory experiments - Multiple index - Seed-metering device - Stable fields - Steady performance - Work pressures
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 913.3 Quality Assurance and Control - 901.3 Engineering Research - 901 Engineering Profession - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 691.1 Materials Handling Equipment - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2011.12.004
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20115014603997 Title:Analysis on insulation performance of sunken solar greenhouse based on CFD Authors:Jiang, Guozhen (1); Hu, Yaohua (1); Liu, Yufeng (1); Zou, Zhirong (2) Author affiliation:(1) College of Mechanical and Electric Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) College of Horticulture, Northwest Agriculture and Forestry University, Yangling 712100, China Corresponding author:Hu, Y.(huyaohua@nwsuaf.edu.cn) Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering Abbreviated source title:Nongye Gongcheng Xuebao Volume:27 Issue:12 Issue date:December 2011 Publication year:2011 Pages:275-281 Language: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 learn more about sunken solar greenhouse insulation performance, the air temperature field inside sunken solar greenhouse with cover curtain was simulated using computational fluid dynamics (CFD) based on unsteady heat transfer model in sunlight greenhouse, and experiment was conducted to validate the simulated results. The validation results showed that simulated results of CFD about air temperature field with cover curtain had a higher reliability. In order to improve heat preservation rate of sunken solar greenhouse, its air temperature field under different cover curtain time was simulated using CFD software and effect on heat energy distribution was analyzed. The results showed that effect of different cover curtain time on air temperature at night inside sunken solar greenhouse was significant, under the conditions of low light and large air temperature difference of inside and outside greenhouse afternoon, night-time air temperature could be significantly improved by cover curtain earlier. This study can provide a more reference for the CFD application and cover curtain management in sunken solar greenhouse. Number of references:19 Main heading:Greenhouses Controlled terms:Air - Atmospheric temperature - Computational fluid dynamics - Computer simulation - Dynamics - Electric circuit breakers - Greenhouse effect - Heat transfer - Models - Solar energy - Solar heating - Thermal insulation Uncontrolled terms:Air temperature - Air temperature fields - CFD applications - CFD softwares - Cover curtain time - Heat energy - Heat preservation - Insulation performance - Low light - Simulated results - Solar greenhouse - Unsteady heat transfer - Validation results Classification code:931.1 Mechanics - 902.1 Engineering Graphics - 804 Chemical Products Generally - 723.5 Computer Applications - 706.2 Electric Power Lines and Equipment - 643.1 Space Heating - 641.2 Heat Transfer - 615.2 Solar Power - 443.1 Atmospheric Properties - 413.2 Heat Insulating Materials - 402.1 Industrial and Agricultural Buildings Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
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