<RECORD 1>
Accession number:20121314899926
Title:Application of combined preservative in anti-melanosis of Penaeus Vanmamei
Authors:Xie, Jing (1); Hou, Weifeng (1); Zhu, Junwei (1); Lin, Yongyan (1); Luo, Aiqiong (1); Tang, Yibao (1)
Author affiliation:(1) Shanghai Aquatic Products Processing and Storage Engineering Technology Research Center, College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Corresponding author:Xie, J.(jxie@shou.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:267-272
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to keep Penaeus Vanmamei fresh, restrain melanosis and extend its shelf-life, response surface method (RSM) was used in the experiments to get a complex preservative combined with phytic acid, chitosan and Ε-polylysine. Results showed that the best combination of the complex preservative was that of phytic acid 0.07%, chitosan 1.5% and Ε-polylysine 0.1%. By treatment with the combined preservative, the sensory evaluation, pH value, total volatile basic nitrogen (TVB-N), total bacteria count (TBC) and trimethylamine(TMA) of Penaeus vannamei were determined under the storage of (4±1)°C to evaluate the quality of samples. It was found that the combined preservative could keep a better sensory quality, and the shelf-life under the storage of (4±1)°C was prolonged from 3-4 to 7-8 days. The total bacterial count (TBC) was only 5.7 lg(CFU/g) on the 10th day. The conclusions can provide a technical support for the optimization of natural preservative and extension of preservation of Penaeus Vanmamei.
Number of references:21
Main heading:Optimization
Controlled terms:Agricultural products - Chitosan
Uncontrolled terms:Anti-meIanosis - Basic nitrogen - Natural preservatives - Penaeus Vanmamei - Penaeus vannamei - pH value - Phytic acids - Polylysine - Preservative - Response surface method - Sensory evaluation - Sensory qualities - Shelf life - Technical support - Total bacterial count - Trimethylamine
Classification code:804.1 Organic Compounds - 821.4 Agricultural Products - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2012.05.044
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 2>
Accession number:20121314899885
Title:Kinematics modeling and analysis of transplanting mechanism with planetary elliptic gears for pot seedling transplanter
Authors:Chen, Jianneng (1); Huang, Qianze (1); Wang, Ying (1); Zhang, Guofeng (1)
Author affiliation:(1) College of Mechanical Engineering and Automation, Zhejiang Sci.-Tech. University, Hangzhou 310018, China
Corresponding author:Chen, J.(jiannengchen@zstu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:6-12
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:To analyze the working performance of the transplanting mechanism with planetary elliptic gears for pot seedling transplanter which was proposed in this paper, the kinematic model of this mechanism was established, and the equations of (angular) displacement, (angular) velocity and (angular) acceleration for transplanting tip were deduced. On this basis, the kinematic simulation and optimization software of the mechanism was compiled by Visual Basic 6.0.Besides, the influence of several main parameters on the working performance of the mechanism was analyzed by this software. These main parameters included the semi-major axis of elliptic gear, the ratio between minor axis and major axis, the initial installation angle of the planet carrier and row spacing. And working performances included hole size, trajectory attitude of transplanting tip and its verticality, and operational stability of the mechanism. According to the analysis results, a group of preferable mechanical parameters were obtained. The corresponding working performance, such as the trajectory and posture of transplanting tip, can meet the agricultural demands of vegetable seedling transplanting with smaller speed fluctuation and acceleration fluctuation in comparison with reciprocating transplanting mechanism.
Number of references:18
Main heading:Kinematics
Controlled terms:Mechanisms - Models - Visual BASIC
Uncontrolled terms:Analysis results - Elliptic gears - Hole size - Installation angle - Kinematic model - Kinematic simulations - Kinematics modeling - Main parameters - Major axis - Mechanical parameters - Minor axis - Operational stability - Parametric analysis - Planet carriers - Pot seedling transplanter - Row spacing - Semimajor axis - Speed fluctuations - Vegetable seedlings
Classification code:601.3 Mechanisms - 723.1.1 Computer Programming Languages - 902.1 Engineering Graphics - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2012.05.002
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 3>
Accession number:20121314899898
Title:Effects of different rotational tillage patterns on soil structure, infiltration and water storage characteristics in dryland
Authors:Hou, Xianqing (1); Jia, Zhikuan (1); Han, Qingfang (1); Sun, Hongxia (1); Wang, Wei (1); Nie, Junfeng (1); Yang, Baoping (1)
Author affiliation:(1) Chinese Institute of Water-Saving Agriculture, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Key Laboratory of Crop Production and Ecology, Minister of Agriculture, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) College of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Han, Q.(hanqf88@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:85-94
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to determine the effects of no-tillage (NT), subsoiling (ST) rotational tillage patterns on soil structure, infiltration and water storage characteristics, the rotational tillage experiments were conducted to study on soil bulk density, aggregate, infiltration rate and water use efficiency in arid areas of southern Ningxia from 2007 to 2010. Tillage treatments comprised NT/ST/NT (no-tillage in first year, subsoiling in second year, again no-tillage in third year), ST/NT/ST (subsoiling in first year, no-tillage in second year, again subsoiling in third year) and CT (conventional tillage in 3 years). The results showed that, compared with CT, the soil bulk density of NT/ST/NT and ST/NT/ST treatments in 0-60 cm soil layers decreased averagely by 3.5% and 6.2%(P<0.05); The number of elastic-stable aggregate (>0.25 mm, DR<inf>0.25</inf>) in 0-20 cm layer increased averagely by 10.28% (P<0.05) and 20.26% (P<0.01), and which increased by 17.2% (P<0.05) and 23.6% (P<0.01) respectively in >20-40 cm soil layer. The water-stable aggregates stability rate (WSAR) of NT/ST/NT treatment in 0-10 cm and >30-40 cm layers increased by 35.1% and 45.8%(P<0.05), and which increased by 101.7% and 61.7% (P<0.01) respectively in >10-20 cm and >20-30 cm layers. The different rotational tillage patterns significantly enhanced soil infiltration characteristics, improved soil water use efficiency and rainfall use rate; The rainfall infiltration rate of NT/ST/NT and ST/NT/ST treatment increased averagely by 35.2% and 15.3% (P<0.05), water use efficiency (WUE) increased by 7.2% and 7.7%(P<0.05), precipitation use efficiency (PUE) increased by9.6% and 10.7% (P<0.05) respectively compared with CT.
Number of references:41
Main heading:Infiltration
Controlled terms:Aggregates - Agricultural machinery - Agriculture - Arid regions - Efficiency - Soil moisture - Soils - Water - Water supply
Uncontrolled terms:Arid area - Conventional tillage - Dryland - First year - Infiltration rate - No tillage - Precipitation use efficiencies - Rainfall infiltration - Rotational tillage pattern - Soil bulk density - Soil infiltration - Soil layer - Soil structure - Soil water - Stability rate - Tillage treatment - Use rate - Water storage - Water use efficiency
Classification code:821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 483.1 Soils and Soil Mechanics - 913.1 Production Engineering - 446.1 Water Supply Systems - 443 Meteorology - 406 Highway Engineering - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.05.015
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 4>
Accession number:20121314899927
Title:Estimation of food grain demand per capita based on rational dietary pattern
Authors:Wang, Tao (1); Lü, Changhe (1)
Author affiliation:(1) Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China
Corresponding author:Lü, C.(luch@igsnrr.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:273-277
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In a region, the food security is affected by the capacity of food supply, which largely determined by crop production, and food demand determined by food diet and population. Taking Beijing-Tianjin-Hebei region as a case, this study developed a model to optimize requirement of food grain considering the need of energy and various nutritional elements such as protein, fat and other minor elements, as well as conversion efficiency of feeds to meats. Firstly, according to data from social surveys and statistics, the types of staple food grain and meats in the region were defined, and then the demand for each of the defined grain and meat types was optimized. Next, the meats, egg and milk were converted to grains and forages based on the conversion ratio of feeds to meat. The optimized annual demand per capita is as follows: rice 4 kg, wheat 103 kg, maize 180 kg, soybean 27 kg, millet 21 kg, potato 27 kg, grass 12 kg, green maize (forage) 28 kg, vegetables 48 kg, fruit 16 kg. This optimization results can be used as a reference for the adjustment of local food production structure.
Number of references:31
Main heading:Optimization
Controlled terms:Conversion efficiency - Cultivation - Food products - Food supply - Grain (agricultural product) - Meats - Models
Uncontrolled terms:Conversion ratio - Crop production - Dietary patterns - Food demand - Food grain - Food security - Local foods - Minor elements - Per capita - Social survey - Staple food - The Beijing-Tianjin-Hebei region
Classification code:525.5 Energy Conversion Issues - 821.3 Agricultural Methods - 821.4 Agricultural Products - 822.3 Food Products - 902.1 Engineering Graphics - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2012.05.045
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 5>
Accession number:20121314899886
Title:Design and kinematics analysis of wide-narrow distance transplanting mechanism based on D-H transformation matrix
Authors:Sun, Liang (1); Zhao, Yun (1); Yu, Gaohong (1); Yao, Jiaming (1)
Author affiliation:(1) College of Mechanical Engineering and Automation, Zhejiang Sci.-Tech. University, Hangzhou 310018, China
Corresponding author:Zhao, Y.(zhaoyun@zstu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:13-18
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to the need of spatial planting trajectory, a new kind of transplanting mechanism with helical elliptical gear trains was put forward based on the traditional transplanting mechanism with planetary gear trains which was used widely in high-speed transplanter. After analyzing the mechanism structure, the key parameters used to determine the planting trajectory were solved as well as the kinematic model of the mechanism based on D-H transformation matrix. The kinematic characteristics such as the side offsets of trajectory and the velocity of seedling needle were studied by the program developed on the basis of the theoretical model, and a set of optimal parameters was obtained by the method of human-computer conversation. Finally, virtual prototype test was carried out after finishing the structural design, the results of which showed that the new transplanting mechanism met the working requirements of wide-narrow distance rice transplanter.
Number of references:18
Main heading:Linear transformations
Controlled terms:Design - Kinematics - Mechanisms - Structural design - Trajectories
Uncontrolled terms:Elliptical gears - High-speed - Human-computer conversations - Key parameters - Kinematic characteristics - Kinematic model - Kinematics analysis - Mechanism structure - Optimal parameter - Planetary gear train - Rice transplanter - Theoretical models - Transformation matrices - Virtual prototype - Wide-narrow distance
Classification code:404.1 Military Engineering - 408 Structural Design - 408.1 Structural Design, General - 601.3 Mechanisms - 921.3 Mathematical Transformations - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2012.05.003
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 6>
Accession number:20121314899894
Title:Mathematical model and characteristics analysis of interconnected hydro-pneumatic suspension
Authors:Wang, Zengquan (1); Shen, Yanhua (1); Yang, Jue (1)
Author affiliation:(1) College of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Corresponding author:Wang, Z.(ustbwzq@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:60-65
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the effect of parameter variation on the stiffness and damping characteristics of interconnected hydro-penumatic suspension, a non-linear mathematical model of interconnected hydro-penumatic suspension was formulated considering the compressibility of fluid and the motion friction. A test bed was constructed and a simulation model of interconnected hydro-penumatic suspension was established. The simulation results were compared with experiment results and theory results. The error was within 10%. Besides, the effects of initial inflation pressure, excitation frequency, and phase difference between the right and left hydraulic cylinders on interconnected hydro-penumatic suspension were also investigated based on the mathematical model. The results indicated that the bigger the initial inflation volume was, the smaller the stiffness became. The bigger the excitation frequency and phase difference were, the bigger the stiffness and damping characteristics became. The initial inflation pressure can hardly affect the characteristics.
Number of references:20
Main heading:Mathematical models
Controlled terms:Characterization - Computer simulation - Equipment testing - Stiffness - Suspensions (fluids)
Uncontrolled terms:Characteristics analysis - Effect of parameters - Excitation frequency - Hydraulic cylinders - Hydro-pneumatic suspension - Inflation pressures - Phase difference - Simulation model - Stiffness and damping characteristics
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 - 804 Chemical Products Generally - 723.5 Computer Applications - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.05.011
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 7>
Accession number:20121314899909
Title:Localization of tomatoes based on binocular stereo vision
Authors:Xiang, Rong (1); Ying, Yibin (1); Jiang, Huanyu (1); Peng, Yongshi (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; (2) College of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, China
Corresponding author:Ying, Y.(yingyb@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
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:In order to enhance the localization accuracy of harvesting robots' vision system, a ranging method based on binocular stereo vision technology was presented, which used a combined matching method and a calibration model for depth values. After centroid-based matching, rough parallax can be acquired to set the parallax range during area-based matching. In this way, calculated amount and error matching probability can be reduced. Then the depth map of tomato region can be obtained through triangulation ranging principle after area-based matching. Depth mean value in tomato region is regarded as the distance between tomato and camera. Experimental results showed that ranging errors and distances were linear relative, so linear regression models were set up to calibrate the ranging results after regression analysis. The ranging error was about -7~5 mm when the distance was less than 650 mm. And the ranging error was about ±10 mm when the distance was less than 1050 mm. It can meet the need of vision system of tomato harvesting robot in most harvesting environments.
Number of references:27
Main heading:Computer vision
Controlled terms:Binocular vision - Dynamic models - Fruits - Geometrical optics - Harvesting - Measurements - Models - Regression analysis - Robots
Uncontrolled terms:Area-based matching - Binocular stereo vision - Calibration model - Combination matching - Depth Map - Depth value - Error matching - Harvesting robot - Linear regression models - Localization accuracy - Matching methods - Mean values - Ranging errors - Tomato - Vision systems
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922.2 Mathematical Statistics - 921 Mathematics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 902.1 Engineering Graphics - 821.3 Agricultural Methods - 741.2 Vision - 741.1 Light/Optics - 731.5 Robotics - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2012.05.027
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 8>
Accession number:20121314899888
Title:Experimental study on wheat feed rate of tangential-axial combine harvester
Authors:Tang, Zhong (1); Li, Yaoming (1); Xu, Lizhang (1); Pang, Jing (1); Li, Hongchang (1)
Author affiliation:(1) Key Lab. of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Li, Y.(ymli@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:26-31
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To timely inform the combine harvester feed rate when the combine harvester was harvesting in field, the core components of tangential drum, the assisting feeding drum and longitudinal-axial drum taken from the tangential-axial combine harvester were used to build tangential-longitudinal-axial threshing-separating test-bed in the laboratory. The performance experiments of wheat threshed and separated with the feed rate of 1-8 kg/s were executed on the tangential-longitudinal-axial threshing-separating test-bed. The power consumption of the tangential drum, the power consumption of the assisting feeding drum and the power consumption of longitudinal-axial drum were measured on the test-bed. Mathematical formulas between the feed rate and longitudinal-axial drum power consumption were derived based on analysis the wheat threshed and separated power on the tangential-longitudinal-axial threshing-separating test-bed. The predicted feed rate of wheat was verified by executed the randomly feed rate experiment on the tangential-longitudinal-axial threshing-separating test-bed. The results showed that the wheat feed rate of the test-bed was accurately predicted by the derived mathematical formula. When the wheat feed rate was less than 6 kg/s, the prediction error was less than 0.89%. When the wheat feed rate was 7-8 kg/s, the prediction error was 1.02%-1.42%.
Number of references:17
Main heading:Agriculture
Controlled terms:Combines - Experiments - Feeding - Harvesters - Separation - Testing
Uncontrolled terms:Combine harvesters - Core components - Experimental studies - Feed-rates - In-field - Longitudinal-axial drums - Mathematical formulas - Performance experiment - Prediction errors - Tangential drums - Threshing-separating
Classification code:423.2 Non Mechanical Properties of Building Materials: Test Methods - 691.2 Materials Handling Methods - 802.3 Chemical Operations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.05.005
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 9>
Accession number:20121314899904
Title:Construction of technology integration theoretical system for temperature-controlled logistics of classified agricultural products
Authors:Wang, Guoli (1); Zhang, Changfeng (1); Wang, Jiamin (1)
Author affiliation:(1) Shandong Key Laboratory of Storage and Transportation Technology of Agricultural Products, Jinan 250103, China; (2) National Engineering Research Center for Agricultural Products Logistics, Jinan 250103, China; (3) Shandong Institute of Commerce and Technology, Jinan 250103, China
Corresponding author:Zhang, C.(zcf202@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:133-138
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Agricultural products temperature-controlled logistics features with multi-discipline, trans-region, multi-loops and multi-subjects. At present, scientific research and subject construction of this filed fall behind industrial development, basic study of logistics theories need to be strengthened urgently to build scientific and suitable theoretical system frame for guiding engineering technical practice. Based on considering current technical requirements of agricultural products temperature-controlled logistics and requirements of social development, the paper proposed agricultural products temperature-controlled logistics technology integration theoretical system by analyzing multiple restriction factors of agricultural products logistics field. Agricultural products temperature-controlled logistics expert decision making system (business intelligence system) based on the database constructed by the theoretical system can provide the government with scientific basis for making cold-chain logistics policy, creating and governing a standard and fair competitive environment. The system can also provide manufacturing enterprises with decision making data for conversion between logistics cost and sales price, and provide consumers with evidence for price and quality selection.
Number of references:15
Main heading:Economic and social effects
Controlled terms:Agricultural products - Competitive intelligence - Data handling - Decision making - Industrial research - Integration - Logistics - Temperature control
Uncontrolled terms:Business intelligence systems - Competitive environment - Decision-making systems - Industrial development - Logistics costs - Manufacturing enterprise - Multi-loops - Sales prices - Scientific researches - Social development - Technical requirement - Technology integration - Theoretical system
Classification code:971 Social Sciences - 921.2 Calculus - 913 Production Planning and Control; Manufacturing - 912 Industrial Engineering and Management - 821.4 Agricultural Products - 731.3 Specific Variables Control - 723.2 Data Processing and Image Processing
DOI:10.3969/j.issn.1002-6819.2012.05.022
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 10>
Accession number:20121314899902
Title:Distribution characteristics of soil wind erosion sediment chemical composition of naked farmland
Authors:Li, Xiaoli (1); Shen, Xiangdong (2); Su, Ya (2); Qi, Xiaohua (2); Yang, Wenhui (2)
Author affiliation:(1) Ministry of Education Key Laboratory of Western Disaster and Environment Mechanics, Lanzhou 730000, China; (2) Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018, China
Corresponding author:Li, X.(nd-lxl@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:114-119
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the loss of soil nutrients caused by wind erosion and the reason and mechanism of soil desertification, taking the typical agro-pastoral ecotone bare tillage land of northern foot of Yinshan Mountain in Inner Mongolia as the study area, saltation soil sediment was collected by SCC-6 sediment collector to conduct screening and weighing. In the soil and collected soil sediment, the main nutrient contents and part of metal elements were determined with chemistry titration and flame atomic absorption spectrophotometer. Through analysis, the distribution of sediments chemical component content and total mass of each chemical composition along vertical height of the soil and the relevant relationships of wind erosion extent with soil chemical composition and particle size were obtained. Through regularity analysis of distribution of chemical components, wind erosion was further validated as the main reason of siol fine particles loss, which is the main factor on causing poor soil.
Number of references:21
Main heading:Soils
Controlled terms:Agriculture - Anoxic sediments - Chemical analysis - Climatology - Diagnosis - Erosion - Factor analysis - Nutrients - Sedimentology - Sediments
Uncontrolled terms:Chemical component - Chemical compositions - Distribution characteristics - Fine particles - Flame atomic absorption spectrophotometer - Inner Mongolia - Metal elements - Nutrient contents - Soil chemical compositions - Soil nutrients - Soil sediments - Soil wind erosion - Study areas - Total mass - Wind erosions
Classification code:922.2 Mathematical Statistics - 821.2 Agricultural Chemicals - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 801 Chemistry - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 481.1 Geology - 461.9 Biology - 461.6 Medicine and Pharmacology - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2012.05.019
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 11>
Accession number:20121314899897
Title:Soil thermal properties determination and prediction model comparison
Authors:Wang, Shuo (1); Wang, Quanjiu (1); Fan, Jun (2); Wang, Weihua (1)
Author affiliation:(1) Institute of Water Resources, Xi'an University Technology, Xi'an 710048, China; (2) State Key Laboratory of Soil Erosion and Dry land Farming on the Loess Plateau, Yangling 712100, China
Corresponding author:Wang, Q.(wquanjiu@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:78-84
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The thermal conductivity is one of the important thermal parameters. In order to get the method for accurately forecasting the thermal conductivity of soils, the heat-pulse direct measuring method and indirect calculation method were compared. According to the principle of heat-pulse, the thermal conductivity of soils with different textures and moisture in the same soil bulk density were measured. The results showed that, under the same moisture, the soil thermal conductivity increased with the sand content rise. Horton equation was used to fit the measured values. The results indicated that the Horton equation may be used to describe the relationship between thermal conductivity and water content, and the parameters in Horton equation were given. Campbell empirical formula of thermal conductivity was used to calculate the thermal conductivity. The results show that there was a large difference between the calculated and measured values. Johansen model and two improved models were used to calculate the thermal conductivity. The results showed that there was a deviation between Johansen model calculated values and measured values, and the results from two improved models were more consistent with measured values. The research indicated that soil thermal conductivity can be calculated by soil texture, water content, soil porosity and bulk density. The correlation coefficients of calculated values from Coˆte´-Konrad model and Lu-Ren model with measured values were 0.643, 0.937 and 0.943, respectively. The two improved models are recommend for calculating soil thermal conductivity, and the application scope of Lu-Ren model is wider than that of Coˆte´-Konrad model.
Number of references:21
Main heading:Thermal conductivity
Controlled terms:Mathematical models - Models - Moisture - Soils - Textures - Thermodynamic properties
Uncontrolled terms:Bulk density - Calculated values - Calculation methods - Campbell - Correlation coefficient - Empirical formulas - Heat pulse - Horton equations - Improved models - Measuring method - Prediction model - Sand content - Soil bulk density - Soil Porosity - Soil texture - Soil textures - Soil thermal conductivity - Soil thermal properties - Thermal parameters
Classification code:483.1 Soils and Soil Mechanics - 641.1 Thermodynamics - 801.4 Physical Chemistry - 902.1 Engineering Graphics - 921 Mathematics - 933 Solid State Physics
DOI:10.3969/j.issn.1002-6819.2012.05.014
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 12>
Accession number:20121314899893
Title:Research on hot-press processing of friction material based on phenolic resin reinforced with mineral fiber
Authors:Ma, Yunhai (1); Tong, Jin (1); Wang, Baogang (1); Sun, Xilong (1); Jiang, Man (3)
Author affiliation:(1) Key Laboratory of Engineering Bionics (Ministry of Education), Jilin University (Nanling Campus), 5988 Renmin Street, Changchun 130022, China; (2) College of Biological and Agricultural Engineering, Jilin University (Nanling Campus), 5988 Renmin Street, Changchun 130022, China; (3) Teaching and Research Center of Chemistry, Jilin University, Changchun 130022, China
Corresponding author:Jiang, M.(jiangman@jlu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:54-59
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to optimize the hot-press processing of the friction material based on the phenolic resin reinforced with the mineral fiber, the influences of dry-mixing hot-press processing on the properties of the friction material, such as wear property, impact strength and hardness, were researched by using uniform experiments in this paper. The best hot-press processing of the friction material were that hot press was 40 MPa, hot press time was 10 min and hot press temperature was 200°C. The regression relationship of the model pressure, the time of heat preservation, the hot press temperature on the friction coefficient and the impact strength of the friction material were carried out through the optimization using SAS, and then the quadratic curve-surface regression model among the friction coefficient, the impact strength and the parameter of the hot press processing was established. The interaction between hot pressure and hot press temperature was analyzed by using Matlab. The results show that when the temperature was fixed, the friction coefficient decreased with the pressure increasing, and when the pressure was fixed, the friction coefficient increased with the temperature increasing. The impact strength was the largest when hot pressure was 50 MPa and hot press time was 40 min. This study could provide technical reference for the development of high-performance fiction material products.
Number of references:17
Main heading:Presses (machine tools)
Controlled terms:Curve fitting - Experiments - Friction - Friction materials - Hot pressing - Impact strength - Minerals - Optimization - Phenolic resins - Phenols - Regression analysis - Resins
Uncontrolled terms:Friction coefficient - Friction coefficients - Friction ratio - Heat preservation - Hot press - Hot pressure - Hot-press temperature - Material products - Mineral fiber - Mineral fibers - Regression model - Regression relationship - Uniform experiment - Wear properties
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 922.2 Mathematical Statistics - 921.5 Optimization Techniques - 901.3 Engineering Research - 815.1.1 Organic Polymers - 812.1 Ceramics - 804.1 Organic Compounds - 603.1 Machine Tools, General - 482.2 Minerals - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2012.05.010
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 13>
Accession number:20121314899889
Title:Development of small off-road diesel with high-performance and low emission
Authors:Yin, Bifeng (1); Huang, Chenchun (1); Liu, Shengji (1); He, Jianguang (2); Sun, Jianzhong (2); Cheng, Yongke (2)
Author affiliation:(1) School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China; (2) Changchai Co. Ltd., Jiangsu, Changzhou 213002, China
Corresponding author:Yin, B.(ybf@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:32-38
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to develop small non-road diesel engines with high-performance and low emission as well, a small non-road direct injection type diesel engine with a single cylinder was taken as the research object. The CAE and CFD comprehensively applied, and the research was proceed with two approaches which were the optimization matching of combustion system parameters and the improvement design of mechanical system. Optimization matching of fuel injection system parameters, combustion chamber and intake swirl ratio were studied by using the multi-dimensional simulation software such as Hydism, Fire and so on. The optimization plan was determined after the effects on combustion process and emission performance were analyzed. The ameliorated design was applied to cylinder block, cylinder head as well as piston, etc. In addition, the finite element analysis software was used. As a consequence, the structural intensity, stiffness and dependability of the diesel engine were enhanced. At the same time, the machine oil consumption reduced effectively. The results of the test showed that, compared with the original engine, the fuel economy and the emission performance were improved effectively. The quantity of CO, HC NOx and PM reduced by 49%, 58%, 74% respectively, while fuel oil and machine oil consumption reduced by 6.9% and 59%. The emission performance of the optimized scheme was obviously improved which could meet EPA IV Non-road Diesel Engine Emission Limit well. This paper provides a reference for the development of small high-performance non-road diesel engines.
Number of references:17
Main heading:Diesel engines
Controlled terms:Combustion chambers - Combustion equipment - Computer software - Design - Finite element method - Fuel economy - Fuel oils - Machine design - Mechanical engineering - Mechanics - Neutron emission - Optimization - Roads and streets
Uncontrolled terms:Combustion pro-cess - Combustion systems - Diesel engine emissions - Emission performance - Finite element analysis software - Fuel injection systems - Intake swirl - Low emission - Mechanical systems - Multidimensional simulation - Non-road - Oil consumption - Optimization matching - Research object - Structural intensity
Classification code:931.3 Atomic and Molecular Physics - 612.2 Diesel Engines - 654.2 Rocket Engines - 723 Computer Software, Data Handling and Applications - 921.5 Optimization Techniques - 921.6 Numerical Methods - 931.1 Mechanics - 608 Mechanical Engineering, General - 523 Liquid Fuels - 521.2 Combustors - 521 Fuel Combustion and Flame Research - 408 Structural Design - 406.2 Roads and Streets - 601 Mechanical Design
DOI:10.3969/j.issn.1002-6819.2012.05.006
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 14>
Accession number:20121314899911
Title:Online detection of tobacco lamina structure based on fractal and image analysis method
Authors:Yu, Na (1); Xu, Dayong (1); Du, Jinsong (1); Deng, Guodong (1); Li, Shanlian (1); Zhu, Wenkui (1)
Author affiliation:(1) Zhengzhou Tobacco Research Institute of China National Tobacco Corporation, Zhengzhou 450001, China
Corresponding author:Zhu, W.(zhu.wen.kui@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
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 monitor and control tobacco lamina quality in threshing, image analysis method was used to measure tobacco lamina area. The fractal model of area distribution of tobacco strips was established based on the fractal theory, and fractal dimension was used to describe the characteristic of area distribution of tobacco strips. The results showed that the model predictions and measured values of area distribution of tobacco strip have high correlation coefficient. Fractal model can describe accurately area distribution of tobacco strip. Fractal dimension could describe the uniformity of tobacco strip structure. For tobacco leafs of different class, the fractal dimension could reflect tobacco characteristic difference in threshing. There is a liner relation between fractal dimension and percentage of >161.29 mm<sup>2</sup> lamina, and the correlation coefficient was greater than 0.90. The determining method for tobacco lamina structure based on image analysis and fractal model could monitor and control tobacco lamina quality on line during threshing process.
Number of references:20
Main heading:Tobacco
Controlled terms:Agriculture - Error detection - Fractal dimension - Fractals - Image analysis - Image processing - Models - Quality control
Uncontrolled terms:Characteristic difference - Correlation coefficient - Determining method - Fractal model - Fractal theory - Image analysis method - Model prediction - Monitor and control - On-line detection - Strip structure - Structure-based - Threshing process
Classification code:921 Mathematics - 913.3 Quality Assurance and Control - 902.1 Engineering Graphics - 821.4 Agricultural Products - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 741 Light, Optics and Optical Devices - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
DOI:10.3969/j.issn.1002-6819.2012.05.029
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 15>
Accession number:20121314899914
Title:Design of small autotracking solar collector drier for maize ears
Authors:Dai, Fei (1); Zhang, Fengwei (1); Han, Zhengsheng (1); Feng, Yongzhong (2)
Author affiliation:(1) School of Engineering, Gansu Agricultural University, Lanzhou 730070, China; (2) College of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Zhang, F.(fengyz@nwsuaf.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:189-193
Language: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 drying time and cost of seeds drying process of maize ears, a kind of small autotracking solar-air drier for maize ears was designed based on abundant light, heat and dry air resources in Northwest China. The overall structure as well as critical component such as energy collection, drying equipment, control system and air blower were designed according to the local climate conditions. Experimental results showed that the drier could dry 500 kg of fresh maize ears with the moisture content (wet base) from 25% to 14% in 5 d (36 h), and it could save 7 h compared to that with fixed solar collectors. The average drying rate increased from 0.256%/h to 0.306%/h, which met the design objective and requirements for storage and drying process of maize ears and other agricultural products.
Number of references:15
Main heading:Drying
Controlled terms:Agricultural products - Solar collectors - Solar energy
Uncontrolled terms:Air blowers - Auto tracking - Critical component - Design objectives - Dry air - Drying equipment - Drying process - Drying rates - Drying time - Energy collection - Local climate - Maize ear - NorthWest China
Classification code:615.2 Solar Power - 642.1 Process Heating - 702.3 Solar Cells - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2012.05.032
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 16>
Accession number:20121314899892
Title:Performances of 190 engine fueled with thermal cracking biogas
Authors:Zhang, Qiang (1); Li, Na (1); Wang, Lingjin (3); Li, Guoxiang (1)
Author affiliation:(1) Department of Energy and Power Engineering, Shandong University, Jinan 250061, China; (2) School of Mechanical Engineering, University of Jinan, Jinan 250022, China; (3) Jinan Diesel Engine Co. Ltd., Jinan 250306, China
Corresponding author:Zhang, Q.(sduzq01@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:50-53
Language: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 performance of the power, economy and emission of biogas engine were studied by experiment of large bore non-pressurized spark-ignition biogas engine using thermal cracking low heat value biogas as fuel. The effects of different operation parameters and different thermal cracking biogas on the power and harmful emissions of the engine were measured. The experimental data showed that the engine run stably in whole operating range, the combustion speed was low and the combustion was the best at BTDC32°CA ignition advance angle. The emission performance of the engine was better. The NO emissions increased with load increase, while the emissions of HC and CO decreased with the load increase. The NO emissions increased with the increase of calorific value of the cracking gas. The results indicate that the stable running and better economy and emission performances can be realized by using thermal cracking low heat value biogas as fuel of large bore engines.
Number of references:16
Main heading:Biogas
Controlled terms:Cracking (chemical) - Fuel economy - Heat engines - Ignition - Machine design - Neutron emission
Uncontrolled terms:Biogas engines - Combustion speed - Cracking gas - Emission performance - Engine performance - Experimental data - Harmful emissions - Heat value - Ignition advance angle - Large bore - NO emissions - Operating ranges - Operation parameters - Thermal cracking
Classification code:932.1 High Energy Physics - 802.2 Chemical Reactions - 612.1 Internal Combustion Engines, General - 601 Mechanical Design - 522 Gas Fuels - 521.1 Fuel Combustion - 521 Fuel Combustion and Flame Research
DOI:10.3969/j.issn.1002-6819.2012.05.009
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 17>
Accession number:20121314899929
Title:Preparation and nutrient properties of texturized rice by hotpressing gelatinization technology
Authors:Zhang, Yanjun (1); Liu, Chengmei (1); Liu, Wei (1); Wan, Jie (1); Zheng, Weiwan (1); Li, Ti (1); Wang, Weihua (1); Wu, Li (1); Zuo, Naibei (1); Zhou, Yiran (1)
Author affiliation:(1) State Key Laboratory of Food Science and Technology, College of Life Science and Food Engineering, Nanchang University, Nanchang 330047, China
Corresponding author:Liu, C.(chengmeiliu@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:282-287
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to make up the malnutrition resulting from eating polished rice in long term, texturized rice (TR) was prepared by the method of hotpressing gelatinization technology (HPGT) using broken rice, rice bran as raw material and natural additive. The effects of HPGT conditions, including feed moisture, screw speed and barrel temperature on the texture and nutrient characteristics of TR were investigated by response surface methodology based on previous trials. When feed rate was 30 r/min and bran addition level was 4%, the independent variables were feed moisture (30%), screw speed (17.7 r/min), five heating zones barrel temperature (50°C, 65°C, 85°C, 100°C, 95-97°C), the processed TR contained TDF 11.44%, protein 11.62%, fat 6.49%, thiamin 2.07 μg/g, riboflavin 0.31 μg/g, γ-oryzanol 12.04 mg/100 g. The results showed that the texture properties of TR were similar to polished rice. The total dietary fiber for TR was increased by 10.74% and the nutriments for thiamin, riboflavin, γ-oryzanol were increased by 1.07, 0.06, 5.83 μg/g, respectively. The research can provide references for industrial production of TR.
Number of references:21
Main heading:Textures
Controlled terms:Extrusion - Gelation - Industrial research - Moisture - Nutrients - Nutrition - Screws
Uncontrolled terms:Barrel temperature - Broken rice - Dietary fibers - Feed-rates - Heating zone - Independent variables - Industrial production - Natural additives - Oryzanol - Polished rice - Response surface methodology - Rice brans - Screw speed - Texture properties
Classification code:901.3 Engineering Research - 821.2 Agricultural Chemicals - 802.3 Chemical Operations - 933 Solid State Physics - 801.4 Physical Chemistry - 535.2.2 Metal Forming Practice - 461.7 Health Care - 605 Small Tools and Hardware
DOI:10.3969/j.issn.1002-6819.2012.05.047
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 18>
Accession number:20121314899922
Title:Effects of drying and wetting on nonlinear decay of soil shear strength in slope disintegration erosion area
Authors:Zhang, Xiaoming (1); Ding, Shuwen (1); Cai, Chongfa (1)
Author affiliation:(1) College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Zhang, X.(zxm_huanong@mail.hzau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
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:Red soils derived from granite in slope disintegration areas are influenced significantly by wetting and drying. Effects of wetting and drying changes on decay of soil shear strength in slope disintegration areas were investigated in laboratory by direct shearing test. Five soil wetting and drying treatments (drying 48 h, drying 24 h, natural water content, wetting 30 s, wetting 60 s) were tested. Experimental data indicated that shear strength indices (soil cohesive force and internal frictional angle) declined with drying and wetting levels, and they reached to the maximum at the water content of about 13%. The relationship between shear strength indices and drying and wetting levels could be simulated to linear function before strength peak and to first order exponential decay function after the peak; Shear strength was dominantly affected by crack evolution during drying period, while matric suction was the main factor for shear strength decline. Finally, the drying and wetting effect on development of slope disintegration was discussed in the paper.
Number of references:19
Main heading:Drying
Controlled terms:Nonlinear analysis - Shear strength - Soils - Wetting
Uncontrolled terms:Cohesive force - Crack evolution - Experimental data - Exponential decay functions - First order - Frictional angles - Linear functions - Matric suctions - Natural water content - Non-linear decay - Peak strength - Red soils - Shearing tests - Slope disintegration area - Soil shear strength - WETTING AND DRYING - Wetting effect
Classification code:421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 483.1 Soils and Soil Mechanics - 642.1 Process Heating - 921 Mathematics - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2012.05.040
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 19>
Accession number:20121314900762
Title:Fractal dimension of soil particle-size distribution characteristics in dry valley of upper Minjiang river
Authors:Fu, Yaolong (1); Zhang, Xingchang (1); Wang, Jingui (1)
Author affiliation:(1) College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China
Corresponding author:Zhang, X.(zhangxc@ms.iswc.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
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:Fractal is one of the impersonality characteristics of soils. In order to study correlation of fractal dimension with soil properties and related affecting factors, the fractal dimensions of particle-size (D<inf>s</inf>) for 161 surface (0-20 cm) soil samples under different land use patterns collected from the dry valley of upper Minjiang River were calculated by the equation of volume fractal dimension. The spatial distribution of the D<inf>s</inf> values as well as the correlations between D<inf>s</inf> and volumetric contents of particle size, organic matter and soil nutrients were analyzed. D<inf>s</inf> can be used as an important parameter for characterizing the soil structures and properties. The research showed that: soil particle size distribution had different fractal characteristics under different land use patterns, its fractal dimensions were between 2.5421 to 2.6691, where silty loam > loam> sandy loam, and D<inf>s</inf> values of farmland were bigger than the woodland. D<inf>s</inf> had a highly significant positive correlation with the volume percentage of soil clay (<0.002 mm) and silt (0.002-0.05 mm), as well as the total potassium contents, whereas a highly significant negative correlation with the volume percentage of soil sand (>0.05 mm) contents. But the correlations of D<inf>s</inf> with the contents of soil organic matter, soil total nitrogen, total phosphorus, available phosphorus and potassium were not significant. The result can provide a theoretical guidance for vegetation restoration and land use development.
Number of references:16
Main heading:Fractal dimension
Controlled terms:Biogeochemistry - Biological materials - Fractals - Land use - Organic compounds - Particle size analysis - Potassium - Rivers - Size distribution - Soils - Textures
Uncontrolled terms:Affecting factors - Available phosphorus - Dry valley - Fractal characteristics - Land use pattern - Minjiang River - Negative correlation - Particles-size distribution - Positive correlations - Sandy loams - Soil clay - Soil nutrients - Soil organic matters - Soil particle size - Soil property - Soil sample - Soil structure - Soil total nitrogen - Total phosphorus - Vegetation restoration - Volume percentage
Classification code:951 Materials Science - 933 Solid State Physics - 921 Mathematics - 804.1 Organic Compounds - 549.1 Alkali Metals - 483.1 Soils and Soil Mechanics - 481.2 Geochemistry - 461.2 Biological Materials and Tissue Engineering - 423 Non Mechanical Properties and Tests of Building Materials - 407.2 Waterways - 403 Urban and Regional Planning and Development
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 20>
Accession number:20121314899910
Title:Tomato targets extraction and matching based on computer vision
Authors:Li, Han (1); Wang, Ku (1); Cao, Qian (1); Yin, Jingjing (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, K.(Wang_ku@263.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
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:Tomato targets extraction and matching is the basis for tomato location and picking of tomato harvesting robot. It is a challenge to match the targets extracted from images captured by different cameras, when the number of the tomatoes is more than three, especially with the presence of clutter and occlusion. A novel tomato targets extraction and matching algorithm is proposed in this paper to solve this problem. Firstly, the image segmentation algorithm is developed to segment the targets from the background, for the tomato images captured based on color analysis. Secondly, a method for slip touching tomatoes separation based on gray-scale local maxima is used to estimate the number and radius of the tomatoes based on the extracted tomato area. Then, RCR (Random Circle Ring) method is applied to extract the center and radius of the tomatoes. The last but not the least, tomato targets extracted from the image captured by the first camera are matched with the ones in the image captured by the second camera through applying SURF (speeded up robust features) algorithm. Experimental results showed that the approach proposed in this paper solved the extraction and matching of tomato targets with the presence of clutter and occlusion to some extent, while achieving obvious validity and accuracy.
Number of references:15
Main heading:Fruits
Controlled terms:Algorithms - Array processing - Cameras - Clutter (information theory) - Computer vision - Image matching - Image segmentation
Uncontrolled terms:Gray scale - Matching - RCR method - SURF - Tomato
Classification code:821.4 Agricultural Products - 742.2 Photographic Equipment - 741 Light, Optics and Optical Devices - 921 Mathematics - 732 Control Devices - 716.1 Information Theory and Signal Processing - 716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2012.05.028
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 21>
Accession number:20121314899918
Title:Pollution load and source apportionment of non-point source nitrogen and phosphorus in Jinjiang River watershed
Authors:Chen, Haiyang (1); Teng, Yanguo (1); Wang, Jinsheng (1); Song, Liuting (1); Zhou, Zhenyao (1)
Author affiliation:(1) Academy of Water Science, Beijing Normal University, Beijing 100875, China
Corresponding author:Chen, H.(chen.haiyang@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:213-219
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The non-point source (NPS) pollution is difficult to manage and control due to its complicated generation and formation. Load estimation and source apportionment are important and necessary for efficient NPS control. The pollution load model based on DEM, sub-basins, land use, soil type got with GIS tool and data from study and experiment was used to study pollution sources and calculate the pollution load of non-point source nitrogen and phosphorus in Jinjiang River watershed. The pollution loads of dissolved nitrogen and phosphorus from land runoff, rural domestic sewage and livestock discharge were calculated based on SLURP model and export coefficients model. And pollution loads of adsorbed nitrogen and phosphorus from soil erosion were calculated with USLE equation. The results showed the pollution load of non-point source nitrogen in Jinjiang River watershed was 12298.95 t/a, most was dissolved nitrogen which taking up to 94.13%. The pollution sources were mainly interrelated with livestock discharge, agricultural field runoff and rural domestic sewage, which contributor ratios were 31.72%, 26.38% and 17.44% respectively. For non-point source phosphorus, its pollution load was 667.04 t/a and took up 56.73% and 43.27% for dissolved and adsorbed phosphorus respectively. Soil erosion, agricultural field runoff and rural domestic sewage were the main sources for phosphorus with contribution ratios of 43.27%, 21.10% and 12.25% respectively. Therefore, soil erosion, agricultural field runoff and livestock discharge became the main pollution sources to influence load of non-point nitrogen and phosphorus in Jinjiang River watershed and should be controlled firstly.
Number of references:20
Main heading:River pollution
Controlled terms:Agricultural runoff - Agriculture - Dissolution - Erosion - Landforms - Models - Nitrogen - Phosphorus - Pollution - Pollution control - Rivers - Sewage - Soils - Watersheds
Uncontrolled terms:Agricultural fields - Dissolved nitrogen - Domestic sewage - Export coefficients - Load estimation - Non-point source - Non-point source pollution - Nonpoint pollutions - Pollution loads - Pollution source apportionment - Pollution sources - River watersheds - Soil erosion - Soil types - Source apportionment - Subbasins
Classification code:902.1 Engineering Graphics - 821.5 Agricultural Wastes - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 802.3 Chemical Operations - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 481.1 Geology - 454.2 Environmental Impact and Protection - 453.1 Water Pollution Sources - 453 Water Pollution - 444.1 Surface Water - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2012.05.036
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 22>
Accession number:20121314899915
Title:Investigation of two-step pretreatment method for production of ethanol from lignocellulosic biomass
Authors:Wang, Xiaojuan (1); Feng, Hao (2); Wang, Bin (2); Li, Zhiyi (1)
Author affiliation:(1) Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116023, China; (2) College of Agricultural, Consumer and Environmental Sciences, University of Illinois at Urbana and Champaign, Urbana, IL 61801, United States
Corresponding author:Li, Z.(lizy@dlut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:194-200
Language: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 developing new pretreatment methods of fuel ethanol production, hemicellulose separation two-step pretreatment method and lignin separation two-step pretreatment method were investigated using switchgrass and corn stover. In the hemicellulose separation two-step pretreatment, a cellulose digestibility of 89% was obtained (Step 1 with the condition of 2%wt H<inf>2</inf>O<inf>2</inf>, 50°C and 16 h; Step 2 with the condition of 121°C and 30 min), while in the lignin separation two-step pretreatment, the highest cellulose digestibility of corn stover was 83% (Step 1 with the condition of 1%wt NaOH, 70%wt ethanol solution, 80°C and 2 h; Step 2 with the condition of 135°C and 30 min). SEM micrographs showed that the surface of biomass had been altered and the accessibility of enzymes had been improved. Hemicellulose and lignin separated from the feedstock could be recovered for the production of value-added products. The results indicate that these two pretreatment methods have a promising future, and are very helpful for the industrialization of fuel ethanol production.
Number of references:29
Main heading:Cellulosic ethanol
Controlled terms:Biomass - Cellulose - Ethanol - Fuels - Lignin - Separation
Uncontrolled terms:Corn stover - Digestibility - Ethanol solutions - Fuel ethanol - Lignocellulosic biomass - Pre-Treatment - Pretreatment methods - SEM micrographs - Switchgrass - Value added products
Classification code:522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 525.1 Energy Resources and Renewable Energy Issues - 802.3 Chemical Operations - 815.1.1 Organic Polymers
DOI:10.3969/j.issn.1002-6819.2012.05.033
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 23>
Accession number:20121314899930
Title:Effect of storage condition on S-ovalbumin formation in albumen
Authors:Huang, Qun (1); Ma, Meihu (1); Jin, Yongguo (1); Qiu, Ning (1); Sun, Shuguo (1); Geng, Fang (1)
Author affiliation:(1) National Research and Development Center for Egg Processing, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (2) Institute of Food Science, Jishou University, Jishou 416000, China
Corresponding author:Ma, M.(mameihuhn@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:288-292
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to evaluate the effect of storage condition on the S-ovalbumin formation in egg albumen, four influential factors such as storage temperature, humidity, CO<inf>2</inf> concentration and film coating were investigated in this study. And an equivalent egg age prediction model was established with S-ovalbumin content as the variable. The results showed that S-ovalbumin formation positively correlated with the storage temperature, and high temperature could accelerate this formation. S-ovalbumin content was not significantly affected by humidity, and high humidity had only a limited inhibition of the S-ovalbumin formation. Low-concentration CO<inf>2</inf> (2.5%) did not inhibit evidently the formation of S-ovalbumin, but high-concentration CO<inf>2</inf>(≥5.0%) had a significant inhibitory effect. Film coating could significantly inhibit the S-ovalbumin formation. Especially, the oil soluble and mineral oil coating processing had a prominent inhibitory effect. By exponential equation analysis, the prediction model of equivalent egg age was established, which could be used to predict the freshness of commercial shell egg stored in any condition by converting S-ovalbumin content into equivalent egg age at 25°C.
Number of references:23
Main heading:Carbon dioxide
Controlled terms:Atmospheric composition - Atmospheric humidity - Coatings - Energy storage - Films - Mathematical models - Proteins - Temperature
Uncontrolled terms:Egg age - Egg albumen - Exponential equations - Film coatings - High humidity - High temperature - Influential factors - Inhibitory effect - Low concentrations - Mineral oil coating - Oil soluble - Prediction model - S-ovalbumin - Storage condition - Storage temperatures
Classification code:921 Mathematics - 804.2 Inorganic Compounds - 804.1 Organic Compounds - 933 Solid State Physics - 702 Electric Batteries and Fuel Cells - 539 Metals Corrosion and Protection; Metal Plating - 443.1 Atmospheric Properties - 641.1 Thermodynamics
DOI:10.3969/j.issn.1002-6819.2012.05.048
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 24>
Accession number:20121314899901
Title:Effects of mechanical properties of surface soil on soil anti-scourability in Yuanmou dry-hot valley
Authors:Chen, Anqiang (1); Zhang, Dan (1); Xiong, Donghong (1); Liu, Gangcai (1)
Author affiliation:(1) Institute of Mountain Hazards and Environment, Chinese Academy of Science and Water Resources Ministry, Chengdu 610041, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu 610041, China
Corresponding author:Liu, G.(liugc@imde.ac.c)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:108-113
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To study the effects of soil physical-parameters on soil anti-scourability in Yuanmou Dry-Hot Valley, soil particle size distribution, soil aggregate content, matric suction, cohesion c and friction angle φ of surface dry red soil were measured in Lab., and soil anti-scourability index (ANS)was determined by undisturbed soil trough scouring test in field. The results showed that the ANS and dispersion rate were the unary cubic multinomial change. ANS decreased gradually with the increase of dispersion rate. With the increase of the mean weight diameter MWD, ANS showed the power function growth. ANS also had the logarithmic function growth with the increase of matric suction, c and φ. The order of correlation degree between ANS and the different soil mechanical parameters were shear strength τ<inf>f</inf> > φ> MWD>dispersion rate>matric suction>c. The stepwise regression analysis between ANS and the different parameters showed that ANS had good linear relation with cohesion c, mean weight diameter MWD and shear strength τ<inf>f</inf> (multiple correlation coefficient R<sup>2</sup>=0.983). The partial correlation coefficient (R<inf>MWD</inf>(0.915)>R<inf>c</inf>(0.829)> R<inf>τf</inf>(0.776)) showed that the stability of water stable aggregate, the cohesive force between particles and aggregates and soil resistance to shear destructive power of flow had a great influence on ANS.
Number of references:23
Main heading:Soils
Controlled terms:Adhesion - Agglomeration - Aggregates - Dispersions - Landforms - Mechanical properties - Particle size analysis - Shear flow - Shear strength - Well drilling
Uncontrolled terms:Anti-scourability - Cohesive force - Correlation degree - Dispersion rate - Dry-hot valley - Friction angles - In-field - Linear relation - Logarithmic functions - Matric suctions - Mean weight diameter - Multinomials - Multiple correlation coefficients - Partial correlation - Power functions - Red soils - Soil aggregate - Soil particle size - Soil-mechanical parameters - Stepwise regression analysis - Surface soil - Undisturbed soils - Water stable aggregates
Classification code:951 Materials Science - 802.3 Chemical Operations - 801 Chemistry - 483.1 Soils and Soil Mechanics - 481.1 Geology - 446.1 Water Supply Systems - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 406 Highway Engineering
DOI:10.3969/j.issn.1002-6819.2012.05.018
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 25>
Accession number:20121314899917
Title:Pilot-scale study on dehydration effect of water hyacinth with different pulverization degree
Authors:Du, Jing (1); Chang, Zhizhou (1); Ye, Xiaomei (1); Xu, Yaoding (1); Zhang, Jianying (1)
Author affiliation:(1) Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Corresponding author:Chang, Z.(czhizhou@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:207-212
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The dehydration technology of water hyacinth has been the choke point to achieve the utilization of its resources, so it was very important for developing the dewatering equipment with high efficiency and low cost. The selfmade equipment of SHJ-400 including solid-liquid separator and special vertical sewage pump was tested under different pulverization degree of water hyacinth through adjusting motor frequency or number of layers with blade on the vertical grinder. Firstly, influence of dehydration effect of water hyacinth under different degree of pulverization was tested in the laboratory, then the new grinder of horizontal and flail were designed based on requirements for pulverization efficiency of dewatering equipment, and a pilot test on operational effect of the whole equipment (including pulverization and dehydration) was carried out. The results showed that the dehydration rate increased with the pulverization degree of water hyacinth, but excessive pulverization caused more energy consumption of pulverization and more contents loss of dry matter as while as more proportion outflow of nitrogen, phosphorus, potassium and other nutrients of residue. The best operating condition was at pulverization degree of 32.92, i. e. 88% proportion of the remnant body length of water hyacinth was smaller than 5 cm after smashed, where moisture content of residue decreased to 83.65%, the lowest total energy consumption of 6.39 kW·h/t was obtained. In addition, the pilot test had the similar effect to laboratory test, particularly the efficiency of pulverization and dehydration were higher than that of laboratory test, the total energy consumption (including pulverization and dehydration) was reduced to 2.28-2.72 kW·h/t. According to 200 t/d processing capacity, the processing cost was 4.5 Yuan/t (the other costs including equipment depreciation was neglected). So the equipment and engineering technology are applicable for industrialization of comprehensive utilization of water hyacinth.
Number of references:18
Main heading:Comminution
Controlled terms:Dehydration - Dewatering - Efficiency - Energy utilization - Equipment - Grinding mills - Phosphorus - Potassium - Sewage pumps - Testing
Uncontrolled terms:Choke points - Dehydration rates - Dewatering equipment - Dry matters - Effect of water - Equipment depreciation - Laboratory test - Low costs - Number of layers - Operating condition - Pilot tests - Pilot-scale study - Processing capacities - Processing costs - Pulverization - Solid-liquid separators - Total energy consumption - Water hyacinth
Classification code:901 Engineering Profession - 804 Chemical Products Generally - 802 Chemical Apparatus and Plants; Unit Operations; Unit Processes - 913.1 Production Engineering - 549.1 Alkali Metals - 452.1 Sewage - 423.2 Non Mechanical Properties of Building Materials: Test Methods - 525.3 Energy Utilization
DOI:10.3969/j.issn.1002-6819.2012.05.035
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 26>
Accession number:20121314899921
Title:Effects of mining activity and climatic change on ecological losses in coal mining areas
Authors:Xu, Zhanjun (1); Hou, Huping (1); Zhang, Shaoliang (1); Ding, Zhongyi (1); Ma, Changzhong (1); Gong, Yunlong (1); Liu, Yanjun (3)
Author affiliation:(1) School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221008, China; (2) Jiangsu Key Laboratory of Resources and Environmental Information Engineering, Xuzhou 221008, China; (3) Land and Resources Bureau in Changzhi, Changzhi 046000, China
Corresponding author:Zhang, S.(slzhang@vip.163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:232-240
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:It is of an important guiding meaning for making the planning of the exploitation of mineral resource and ecological environment improvement to evaluate the relative effect of ecological environmental loss in mine regions. From view of ecological point, the study selected NPP as the measuring indicator to unify the impacts of climate change and mining activities on the losses of ecological environment in mining areas. Through the indicator it achieved the comparability of the impacts of climate change and mining activities on the loss of ecological environment in mining areas. The results showed that: 1) Net primary productivity of vegetation (Net Primary Productivity) in the mining was the result of the comprehensive effect of climate factors and mining factors, the impact of climate change on NPP ranged from 0.111 to 3.333 g/(m<sup>2</sup>·mon) and the impact of mining activities on NPP ranged from 90.525 to 107.892 g/(m<sup>2</sup>·mon). The impact of mining activities on NPP wss greater than that of climate change on NPP and NPP was sensitive to the changes of mining activities. 2) Climate change promoted NPP change towards the positive direction, mining activities promoted NPP change towards both positive and negative direction. In 1987-1998, mining activity was the dominant factor for promoting NPP change; In 1998-2005 climate change was leading factor for promoting NPP change, and in 2005-2008 mining activity became the dominant factor for promoting NPP change. At the same time, as the impact of mining activities increased, the effect of mining activities turned out to be the leading factor, and the proportion of NPP change to the negative direction increased. 3) In the mining destruction region, the impact of mining activity played a decisive role in the ecological environment, it was showed by the NPP decrease of crop land. Through taking ecological reclamation measures, the ecological environment can be improved with the NPP increase of woodland. In the mining impact region, the impact of climate change on NPP plays a decisive role.
Number of references:20
Main heading:Climate change
Controlled terms:Coal mines - Ecology - Mineral resources
Uncontrolled terms:Climate factors - Climatic changes - Coal mining area - Comprehensive effect - Dominant factor - Ecological environments - Ecological loss - Mining activities - Mining areas - Net primary productivity - Relative effect
Classification code:451 Air Pollution - 454.3 Ecology and Ecosystems - 501 Exploration and Prospecting - 503.1 Coal Mines
DOI:10.3969/j.issn.1002-6819.2012.05.039
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 27>
Accession number:20121314899928
Title:Oil absorption reducing method and mechanism of fried potatoes
Authors:He, Dingbing (1); Xu, Fei (1); Hua, Zezhao (1); Song, Xiaoyan (1)
Author affiliation:(1) Institute of Cryobiology and Food Freezing Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Corresponding author:Xu, F.(xufei.first@263.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:278-281
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:For finding effective method and mechanism of reducing oil content, oil-absorption kinetics for deep-fat fried potato was investigated, it was found that most oil was absorbed during early cooling process. From the experiments of different vacuum environments during cooling, comparing the oil-uptake start time and the pressure difference (Patm-Pv) formed by condensation, it was further found that both reducing the pressure difference (Patm-Pv) and postponing the oil absorption by taking appropriate methods can promote the drainage of surface oil and reduce the total oil content of fried food. The best result can be obtained with 13.6% oil content at 80 kPa cooling condition. The research can provide a reference for reducing oil-uptake technological process in food industry.
Number of references:15
Main heading:Absorption cooling
Controlled terms:Food processing - Thermal processing (foods) - Vacuum
Uncontrolled terms:Cooling conditions - Cooling process - Food industries - Fried foods - Fried potato - Oil absorption - Oil contents - Potato - Pressure differences - Technological process - Vacuum environment
Classification code:633 Vacuum Technology - 641.2 Heat Transfer - 822.2 Food Processing Operations
DOI:10.3969/j.issn.1002-6819.2012.05.046
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 28>
Accession number:20121314899896
Title:Numerical simulation and experimental study on hydrodynamic characteristics of T-type pipes
Authors:Chen, Jianglin (1); Lü, Hongxing (1); Shi, Xi (1); Zhu, Delan (1); Wang, Wene (1)
Author affiliation:(1) College of Water Resources and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Lü, H.(lvhongxing@nwsuaf.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:73-77
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to research flow characteristics of T-type pipeline, experiments and numerical simulations were conducted. Pressure sensors were used to monitor the dynamic water pressure of the pipeline, and SIMPLEC method was applied to solve the Navier-Stokes equations and the κ-Ε turbulence equation in Numerical simulation. Mechanism of pressure loss under different operating cases were analyzed, and impacts of different split ratios, entrance velocities, length-diameter ratios on head loss coefficient were obtained. The head loss coefficient of single tube was 1.01-1.94 times larger than that of double-pipe. The pressure loss coefficient of vertical branch pipe was 2.20-2.55 times larger than that of horizontal branch pipe given same inlet Re. The influence of different length-diameter ratio on head loss coefficient of the vertical branch pipe was not obvious, while the head loss coefficient of the horizontal branch increased with decrease of length-diameter ratio. The numerical simulation results accord with the experimental results well, and they are instructive to project applications.
Number of references:20
Main heading:Computer simulation
Controlled terms:Cascades (fluid mechanics) - Experiments - Navier Stokes equations - Pipe
Uncontrolled terms:Branch pipes - Entrance velocity - Experimental studies - Flow characteristic - Head loss coefficient - Horizontal branches - Hydrodynamic characteristics - Length-diameter ratio - Pressure loss - Pressure loss coefficient - SIMPLEC - Single tubes - Split ratio - Turbulence equations - Water pressures
Classification code:619.1 Pipe, Piping and Pipelines - 631.1 Fluid Flow, General - 723.5 Computer Applications - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.05.013
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 29>
Accession number:20121314899912
Title:Integration and application of intelligent measurement and control system for fermentation process
Authors:Wang, Jianlin (1); Xue, Yaoyu (1); Zhao, Liqiang (1); Li, Zheng (2)
Author affiliation:(1) College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China; (2) Key Laboratory of Advanced Textile Composites, Ministry of Education, Tianjin Polytechnic University, Tianjin 300160, China
Corresponding author:Wang, J.(wangjl@mail.buct.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
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:Measurement and control system of fermentation process is the basis of parameters measurement and optimal regulation in fermentation process, directly influencing the optimal control performance of the fermentation system. Considering the intelligent measurement of L-lactic acid fermentation process, an integration method of measurement and control system based on intelligent measurement for fermentation process was proposed. The system architecture and implementing method were presented. The intelligent measurement and control system using PXI bus based on virtual instrument technology for fermentation process was integrated, and its hardware and software design were given. By constructing soft-sensor model in this system, the unmeasurable variables of fermentation process can be effectively estimated and controlled on-line. It provides a new measurement and control system for fermentation process. The experiment results show that the glucose liquid consumption can be estimated on-line by using the system in the L-lactic acid fermentation process, and the real-time closed loop optimal fed-control can be realized, furthermore, the production of L-lactic acid increases by 23%, as compared with the traditional manual control.
Number of references:20
Main heading:Fermentation
Controlled terms:Glucose - Intelligent systems - Lactic acid - Measurements - Optimal control systems - Process control - Sensors
Uncontrolled terms:Bus-based - Closed loops - Fermentation process - Fermentation systems - Hardware and software - Integration method - Intelligent measurement - L-Lactic acid - Measurement and control - Optimal controls - Soft sensor models - System architectures - Virtual instrument technology
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 804.1 Organic Compounds - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 801.2 Biochemistry - 731.1 Control Systems - 731 Automatic Control Principles and Applications - 723.4 Artificial Intelligence - 801 Chemistry
DOI:10.3969/j.issn.1002-6819.2012.05.030
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 30>
Accession number:20121314899887
Title:Parameters optimization of vertical axial flow thresher for soybean breeding
Authors:Hou, Shouyin (1); Chen, Haitao (1)
Author affiliation:(1) College of Engineering, Northeast Agriculture University, Harbin 150030, China
Corresponding author:Chen, H.(haitao1963@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:19-25
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to find the optimal combination of the structure and working parameters of the vertical axial-flow soybean breeding thresher, and experiments were conducted to study the effect of the structure and working parameters for threshing, separating and cleaning. The structure and working principle were introduced. A central composite rotatable orthogonal experimental design of response surface methodology was employed for finding the optimum combination effecting on the working properties. The four parameters: linear velocity, concave clearance, feeding rate and moisture content were selected as input variables. Cracked grains, impurities, loss of entrapped grains, loss of unthreshed grains, spattered grains and residual grains were selected as response functions. Experimental results indicated that the most optimum combination region of the moisture content was 14%-20%, the linear velocity was 6.5-8.3 m/s, the concave clearance was 15 mm, the feeding rate was 2.4 kg/min, the cracked grains were less than 1%, impurities were less than 0.5%, loss of unthreshed grains were less than 2% and loss of entrapped grains were less than 0.7%. Spattered grains and residual grains were zero.
Number of references:14
Main heading:Optimization
Controlled terms:Agriculture - Experiments - Moisture determination - Oilseeds - Seed
Uncontrolled terms:Central composite - Concave clearances - Feeding rate - Input variables - Linear velocity - Optimal combination - Optimum combination - Orthogonal experimental design - Parameters optimization - Response functions - Response surface methodology - Soybean - Threshing machines - Vertical axial - Working parameters - Working principles - Working properties
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 901.3 Engineering Research - 921.5 Optimization Techniques - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2012.05.004
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 31>
Accession number:20121314899903
Title:Flood disaster risk analysis based on variable fuzzy sets theory
Authors:Zou, Qiang (1); Zhou, Jianzhong (1); Zhou, Chao (2); Song, Lixiang (1); Guo, Jun (1); Yang, Xiaoling (1)
Author affiliation:(1) School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; (2) Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Corresponding author:Zhou, J.(jz.zhou@hust.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:126-132
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on the disaster system theory and the consideration of natural properties of hazard and environmental as well as socioeconomics of hazard-affected bodies, the primary risk assessment system and grading standard for flood diversion district were established. Then taking the towns as the basic assessment units, on the basis of variable fuzzy sets theory, the corresponding model for variable fuzzy assessment was established, which could reasonably identify the relative membership degree between the index of assessment unit and its standard interval, thus properly determine the comprehensive assessment grade of each unit by varying the parameters of the model. In this way, the flood hazard grade and flood vulnerability grade for each unit could be calculated, respectively. After that, the flood risk grade for each unit was achieved from flood hazard and vulnerability grade with the flood risk grade classification matrix, which was divided into five grades, i. e. very high, high, medium, low, and very low respectively. Finally, taking the case study in Jingjiang flood diversion district for example, the practical application showed that the method was flexible and its results fitted with the actual situations. The method can also be applied for risk assessment of other natural disasters.
Number of references:19
Main heading:Hazards
Controlled terms:Flood damage - Fuzzy sets - Indexing (of information) - Rating - Risk assessment
Uncontrolled terms:Assessment system - Classification matrix - Comprehensive assessment - Disaster system - Flood disaster - Flood diversion - Flood hazards - Flood risk grade - Flood risks - Fuzzy assessments - Jingjiang flood diversion district - Natural disasters - Natural properties - Relative membership degrees - Socio-economics - Variable fuzzy set
Classification code:902.2 Codes and Standards - 903.1 Information Sources and Analysis - 914.1 Accidents and Accident Prevention - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.05.021
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 32>
Accession number:20121314899900
Title:Characteristics of laboratory-field measured spectra responding to alkalinized soil and conversion
Authors:Zhang, Fang (1); Xiong, Heigang (2); Ding, Jianli (1); Xia, Qianrou (1)
Author affiliation:(1) College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China; (2) College of Art and Science, Beijing Union University, Beijing 100083, China; (3) Key Laboratory of Oasis Ecology, Ministry of Education, Xinjiang University, Urumqi 830046, China
Corresponding author:Xiong, H.(xhg1956@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:101-107
Language: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 conditions and rules of conversions between spectra of alkalinized soil under different measure environments, the paper investigated the laboratory-measured and field-measured spectra of alkalinized soil within the Qitai oasis at the northern slope area of Tianshan Mountain in Xinjiang. Based on the analysis of the characteristics of the laboratory-measured and field-measured spectra and physicochemical properties of alkalinized soil at the study spots, the spectral transformation between the laboratory-measured and field-measured spectra were built by multiple linear regression method. The results showed that there was a significant positive correlation between the field-measured spectra and the soil pH value, therefore soil alkalinization could be effectively monitored by using the field-measured spectra. Although the correlation between the laboratory-measured spectra and the soil pH value was insignificant, pH value has the greatest impact on the conversion from the laboratory-measured spectra to the field-measured spectra, followed by the band3 (630-690 nm) and the band2 (520-600 nm) of the laboratory-measured spectra. The laboratory-measured spectra of band1 (450-520 nm) and band4 (760-900 nm) had no significant correlations with the field-measured spectra of the band1 (450-520 nm), band2 (520-600 nm), band3 (630-690 nm) and band4 (760-900 nm). The laboratory-measured spectra were significantly negatively correlated to the soil OM(organic matter), therefore the laboratory-measured spectra had the potential for estimating the quantitative retrieval of the soil OM. The model for laboratory-to-field spectral measurement transformation was less complex with fewer variables, more stability and higher verified accuracy, so it was better than the model for filed-to-laboratory spectral transformation.
Number of references:17
Main heading:Laboratories
Controlled terms:Linear regression - Measurements - pH - Soils - Spectrum analysis
Uncontrolled terms:Field-measured spectrum - Laboratory-measured spectrum - Multiple linear regression method - pH value - Physicochemical property - Positive correlations - Soil pH - Spectral measurement - Spectral transformations - Spectrum transformation - Tianshan - Xinjiang
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 922.2 Mathematical Statistics - 801 Chemistry - 483.1 Soils and Soil Mechanics - 801.1 Chemistry, General
DOI:10.3969/j.issn.1002-6819.2012.05.017
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 33>
Accession number:20121314899920
Title:Land use classification based on RS object-oriented method in coastal spectral confusion region
Authors:Chang, Chunyan (1); Zhao, Gengxing (1); Wang, Ling (1); Zhu, Xicun (1); Gao, Ze (1)
Author affiliation:(1) College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China
Corresponding author:Zhao, G.(zhaogx@sdau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:226-231
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Land use and land cover information acquisition in coastal spectral confusion region is one of the difficulties for remote sensing information extraction. In this paper, image segmentation and support vector machine classification method were used in order to extract the information of land use/cover with object-oriented technology, based on TM image of March 11, 2007 in Kenli County. The results were compared with that of traditional pixel-based classification. Our results showed that the precision of classification reached 84.83% basing on object-oriented method, which increased by 5.94% and 19.53% respectively in comparison with maximum likelihood method and spectral angle mapper method. It also avoided the "salt and pepper" problem effectively. This study indicated that classification accuracy and efficiency of remote sensing image were improved with object-oriented method, which also provided an effective technological means for fast and accurate information extraction of Land use/cover in coastal spectral confusion region.
Number of references:25
Main heading:Land use
Controlled terms:Image fusion - Image reconstruction - Image segmentation - Information analysis - Remote sensing - Spectrum analysis - Support vector machines
Uncontrolled terms:Classification accuracy and efficiency - Information acquisitions - Information Extraction - Land use and land cover - Land use/cover - Landuse classifications - Maximum likelihood methods - Object oriented - Object oriented method - Object-oriented technology - Remote sensing images - Remote sensing information - Spectral angle mappers - Support vector machine (SVM) - Support vector machine classification - TM image
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 - 903.1 Information Sources and Analysis - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications - 403 Urban and Regional Planning and Development - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2012.05.038
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 34>
Accession number:20121314899899
Title:Effect of freeze-thaw action on geosynthetic clay liner anti-seepage characteristics
Authors:Zhou, Chunsheng (1); Shi, Haibin (1); Yu, Jian (3)
Author affiliation:(1) Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Inner Mongolia Huhhot 010018, China; (2) Resource and Environmental Economics of Inner Mongolia Institute of Finance, Inner Mongolia Huhhot 010070, China; (3) Water Resources Research Institute of Inner Mongolia, Hohhot 010020, China
Corresponding author:Shi, H.(shi_haibin@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:95-100
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the seepage control performance of Geosynthetic Clay Liner (GCL) in lining channel in the cold and arid regions, the antifreeze characteristics of three different GCL (produced in Korea and China, 1#, 2#, 3#) were studied with indoor simulation method. The results showed that by hydrating with the Yellow River water and after 31 times of freeze-thaws, the free swelling volume of 1#?2#?3# GCL increased by 16.7%, 4.5% and 8.0% respectively; The filtration loss reduced by 31.1%, 28.9% and 27.0% respectively; The yield value increased by 200.0%, 23.3% and 90.6% respectively, and the EC values of the filtrate reduced by 27.3%, 27.0% and 31.0% respectively. The permeability coefficient increased by one order of magnitude, but was still small, which was 0.35-0.72% in canal bed. These indicated the GCL can be used in canal lining in the northwest arid and saline regions.
Number of references:18
Main heading:Thawing
Controlled terms:Arid regions - Bentonite - Hydraulic conductivity - Shear stress - Water filtration
Uncontrolled terms:Anti-seepage - Expiment - Filtration loss - Freeze-thaw - Freeze-thaw cycles - Geosynthetic clay liners - Indoor simulation - Saline region - Seepage control - Yellow river - Yield value
Classification code:822.2 Food Processing Operations - 632.1 Hydraulics - 482.2 Minerals - 445.1 Water Treatment Techniques - 444 Water Resources - 443 Meteorology - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2012.05.016
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 35>
Accession number:20121314899908
Title:Crop classification by remote sensing based on spectral analysis
Authors:Chen, Sining (1); Zhao, Yanxia (2); Shen, Shuanghe (1)
Author affiliation:(1) College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China; (2) Chinese Academy of Meteorological Sciences, Beijing 100081, China
Corresponding author:Zhao, Y.(zyx@cams.cma.gov.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:154-160
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:In order to acquire the information of crop classification to estimate crop yield accurately in Northeast China, four kinds of crops (rice, wheat, maize, soybean) were taken as study objects and 250 m MODIS time-series NDVI data was used to analyze the crop distribution patterns based on spectral analysis method. The area derived from the crop classification result was compared with the planted area from statistical data, and the results showed that the correlation of soybeans was better than maize and rice, with R<sup>2</sup>=0.770, 0.710, 0.686 respectively. The crop classification method used in the study is suitable for the situation with limited experimental conditions, difficult for obtaining measurements (remote sensing data as the main data source) and large planting area with single crop.
Number of references:17
Main heading:Crops
Controlled terms:Classification (of information) - Radiometers - Remote sensing - Spectrum analysis
Uncontrolled terms:Crop classification - Crop classification methods - Crop yield - Data source - Distribution patterns - Experimental conditions - MODIS - NDVI - NDVI data - Northeast China - Planted areas - Remote sensing data - Spectral analysis method - Statistical datas
Classification code:944.7 Radiation Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 821.4 Agricultural Products - 731.1 Control Systems - 716.1 Information Theory and Signal Processing
DOI:10.3969/j.issn.1002-6819.2012.05.026
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 36>
Accession number:20121314899907
Title:Vegetation classification technology of hyperspectral remote sensing based on spatial information
Authors:Wu, Jian (1); Peng, Daoli (1)
Author affiliation:(1) Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China
Corresponding author:Peng, D.(dlpeng@bjfu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:150-153
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The vegetation classification effects of traditional remote sensing methods only considering spectral information are unsatisfactory because the hyperspectral data usually have noises, so it is particularly important to blend spatial information for vegetation classification. Firstly, vegetation information was extracted by NDVI threshold value, and minimum noise fraction (MNF) was used to compress Hyperion hyperspectral images, and the first 60 components were selected. And then a kind of hyperspectral image vegetation classification method with the combination of spatial and spectral information was applied to complete the vegetation classification in study area. The results indicated that the average classification accuracy of all vegetation types was 90.3%, while the average classification accuracy of maximum likelihood method was only 70.0%. The vegetation classification method of hyperspectral remote sensing combining spatial information can effectively weaken the noises and to a certain extent improve classification accuracy, so the method proposed in this paper has certain reference value in actual application.
Number of references:16
Main heading:Vegetation
Controlled terms:Classification (of information) - Independent component analysis - Maximum likelihood - Remote sensing
Uncontrolled terms:Classification accuracy - Hyper-spectral images - Hyperion - HyperSpectral - Hyperspectral Data - Hyperspectral remote sensing - Maximum likelihood method - Maximum likelihood methods - Minimum noise fraction - Reference values - Spatial informations - Spectral information - Study areas - Vegetation classification - Vegetation type
Classification code:716.1 Information Theory and Signal Processing - 723.4 Artificial Intelligence - 731.1 Control Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 922.1 Probability Theory
DOI:10.3969/j.issn.1002-6819.2012.05.025
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 37>
Accession number:20121314899923
Title:Ecosystem services value based on land use change in Huairou reservoir watershed
Authors:Wang, Yousheng (1); Yu, Xinxiao (1); He, Kangning (1); Song, Siming (1); Jia, Guodong (1); Huang, Zhiying (1)
Author affiliation:(1) Water and Soil Conservation Department, Beijing Forestry University, Beijing 10086, China; (2) Dingxi Station for Extending Agricultural Techniques of Gansu Province, Dingxi 743000, China
Corresponding author:Wang, Y.(wangysh2000_1@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:246-251
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:It is of significance to study the effect of land use change on ecosystem service values. Base on five dynamic data of land use in Huairou reservoir watershed, this paper analyzed the land use change and its consequent changes in ecosystem services value in the watershed from 1990 to 2008. The results showed that the main land use in the watershed was forest, and the area of forest and water exhibited an increasing trend. The area of farmland almost remained unchanged, while the area of unused land showed itself as a downtrend. The total ecological services value exhibited an increasing trend, and in 1995, 2000, 2005 and 2008 which increased by 0.57%, 1.58%, 2.46% and 2.88%, respectively compared with that in 1990.The forest and water were the land use types that made the greatest contribution to the total ecosystem services value of the study region. The accumulative ecosystem services value of two land use types accounted for over 80% of the total values in the watershed, indicating that those land use categories played important and remarkable roles in ecosystem services. And single ecosystem service value was in order of biodiversity maintenance>hydrological adjustment>gas regulation>climate regulation>maintain soil>recreation and culture>raw materials production>waste treatment and food production.
Number of references:20
Main heading:Land use
Controlled terms:Biodiversity - Ecology - Ecosystems - Forestry - Landforms - Waste treatment - Watersheds
Uncontrolled terms:Dynamic data - Ecological services - Ecosystem service values - Ecosystem services - Ecosystem services value - Food production - Gas regulations - Land use type - Land-use change - Materials production - Single ecosystem service value - Total values
Classification code:481.1 Geology - 461 Bioengineering and Biology - 454.3 Ecology and Ecosystems - 821.0 Woodlands and Forestry - 454 Environmental Engineering - 444.1 Surface Water - 403 Urban and Regional Planning and Development - 452.4 Industrial Wastes Treatment and Disposal
DOI:10.3969/j.issn.1002-6819.2012.05.041
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 38>
Accession number:20121314899919
Title:Influence factors and prediction model for soil nickel ecological threshold
Authors:Wang, Xiaoqing (1); Ma, Yibing (2); Huang, Zhanbin (1)
Author affiliation:(1) School of Chemical and Environmental Engineering, University of Mining and Technology-Beijing, Beijing 100083, China; (2) Key Lab. of Crop Nutrition and Fertilization of Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (3) Department of Environmental and Chemical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China
Corresponding author:Ma, Y.(ybma@caas.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:220-225
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Correction with leaching-aging factor should be applied in deriving soil ecological threshold with toxicity data from laboratory toxicity test in order to eliminate the difference of toxicity in field-contaminated soils and that in laboratory amended soils. In the paper the soil ecological threshold for soil nickel was derived with 17 species toxicity data and corrected with leaching-aging factor. The results showed that leaching effect was more significant in the soils with pH>8.5, and the values of leaching factors were all more than 2 except for exceptional soil. Aging effect was more significant in the soil with pH>7.0 and the value of aging factor increased with pH value. Main soil factors controlling soil ecological threshold for nickel were found as soil pH value and soil organic carbon content (OC). The pH value, OC and CEC could explain the nickel ecological threshold variation by 86.2%, 9.0% and 4.1% proportion respectively. The two-factor predictive model based on soil pH and OC were developed and validated for predicting ecological threshold of soil nickel. The results showed that the model could predict ecological threshold for nickel based on soil pH and OC well and the determination coefficient (R<sup>2</sup>) reached up to 0.972. The model can be applied in predicting nickel ecological threshold for different kinds of soils according to the soil properties.
Number of references:31
Main heading:Geologic models
Controlled terms:Aging of materials - Ecology - Forecasting - Leaching - Mathematical models - Nickel - pH effects - Soil pollution - Soils - Toxicity
Uncontrolled terms:Aging effects - Aging factors - Amended soil - AS-soils - Determination coefficients - Ecological threshold - pH value - Prediction model - Predictive models - Soil factors - Soil organic carbon content - Soil pH - Soil property - Toxicity data - Toxicity test
Classification code:921 Mathematics - 804 Chemical Products Generally - 801.1 Chemistry, General - 548.1 Nickel - 951 Materials Science - 533.1 Ore Treatment - 481.1 Geology - 454.3 Ecology and Ecosystems - 421 Strength of Building Materials; Mechanical Properties - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2012.05.037
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 39>
Accession number:20121314899891
Title:Visualization of influence of ERG on combustion process and emission performance for light-duty diesel engine
Authors:Jia, Hekun (1); Liu, Shengji (1); Yin, Bifeng (1); Huang, Chenchun (1)
Author affiliation:(1) School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Jia, H.(human_cm@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:44-49
Language: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 exploring the influence of EGR on combustion and emission characteristics in a low load working condition on a light-duty diesel engine. Taking one high pressure common rail light-duty diesel engine as the research object, a visualization platform for cylinder working process of a diesel engine was built. Influence of EGR on combustion process and emission characteristics was studied through cylinder combustion process high-speed photography, cylinder pressure and heat release rate. The study illustrated that spray and combustion process was analyzed directly through visualization platform. In a condition of low load, with the EGR rate increased (&le30%), the ignition delay shortened, and the combustion process extended, meanwhile the maximum combustion pressure, the peak of heat release rate and the average temperature of combustion last stage rose. Compared with the EGR rate of 10%, the NO<inf>X</inf>, HC and CO emissions reduced by 65.6%, 46.4% and 28.7%, soot emissions first decreases and then increases. The soot emission and fuel economy worsened when the EGR rate was over 30%. This study provided an effective way of reducing diesel emission.
Number of references:15
Main heading:Diesel engines
Controlled terms:Combustion - Cylinders (shapes) - Emission control - Flow visualization - Fuel economy - High speed photography - Soot - Visualization
Uncontrolled terms:Average temperature - CO emissions - Combustion pressure - Combustion pro-cess - Cylinder pressures - Diesel emission - Emission characteristics - Emission performance - Heat Release Rate (HRR) - High pressure common rail - Ignition delays - Last stage - Light-duty - Low load - Research object - Soot emissions - Spray and combustion - Working conditions - Working process
Classification code:902.1 Engineering Graphics - 804 Chemical Products Generally - 742.1 Photography - 631.1 Fluid Flow, General - 612.2 Diesel Engines - 521.1 Fuel Combustion - 521 Fuel Combustion and Flame Research - 451.2 Air Pollution Control - 408.2 Structural Members and Shapes
DOI:10.3969/j.issn.1002-6819.2012.05.008
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 40>
Accession number:20121314899905
Title:Development of leaf temperature measuring instrument and its application in plant leaf parameter measurement
Authors:Li, Dongsheng (1); Guo, Lin (1); Guo, Chongchong (1); Guo, Tiantai (1)
Author affiliation:(1) College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
Corresponding author:Guo, C.(guo_chong_chong@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:139-144
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the reveal water state of plant, and research the plant canopy-air temperature difference and leaf thickness variation, the leaf temperature measuring instrument was developed, meanwhile, the YI-201020 leaf thickness precision instrument and leaf temperature measuring instrument were applied to monitor the leaf thickness and leaf temperature of chilies and peanuts at different stages, then the correlations between plant canopy-air temperature difference and leaf thickness after taking ambient temperature into consideration were analyzed. The experimental results showed that: the sensor linearity was 1%, the return error was 0.02 V, the sensitivity was 0.04 V/°C, the resolution was 0.3°C, the maximum indication error of instrument in the range of 0~90°C was 0.27°C, and the expanded uncertainty was 0.41°C; the leaf thickness was in negative relationship with canopy-air temperature difference at every stage of the two plants, especially during the growth stage. The results in this paper provide a reference for the plant physics research.
Number of references:20
Main heading:Atmospheric temperature
Controlled terms:Design - Equipment - Optical correlation - Temperature measuring instruments
Uncontrolled terms:Growth stages - Leaf temperature - Leaf thickness - Parameter measurement - Physics research - Plant canopy-air temperature difference - Plant leaf - Precision instrument - Temperature differences - Water state
Classification code:408 Structural Design - 443.1 Atmospheric Properties - 741.1 Light/Optics - 901 Engineering Profession - 944.5 Temperature Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2012.05.023
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 41>
Accession number:20121314899890
Title:Emission performances of 2004 Mack MD11 engine fueled with hydrogen-diesel blend
Authors:Yang, Zhenzhong (1); Li, Hailin (2)
Author affiliation:(1) School of Mechanical Engineering, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China; (2) Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown 26506, WV, United States
Corresponding author:Yang, Z.(yzzho@163.com.om)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:39-43
Language: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 emissions of diesel engines, researchers have paid attention to the research on hydrogen as fuel of diesel engines in recent years. Investigation into the effect of the addition of hydrogen at different proportion (the highest proportion of the hydrogen is 7%) into 2004 Mack MD11 diesel engine on the emissions of CO, CO<inf>2</inf> and HC were carried out. Results showed that corresponding to pure diesel operation, the addition of hydrogen into the engine helped to reduce the emissions of CO, CO<inf>2</inf> and HC in various load. Moreover, as the increase of amount of hydrogen (or the more H<inf>2</inf> added), law of the emission change for them was different with the change of load. Furthermore, the emissions of CO, CO<inf>2</inf> and HC had a more significant reduction at low load. For example, for operation at 10% load, CO emission reduced more than 50%, CO<inf>2</inf> emissions reduced more than 60%, and HC emission reduced more than 40%.
Number of references:17
Main heading:Carbon dioxide
Controlled terms:Cobalt - Diesel engines - Hydrogen - Hydrogen fuels - Particulate emissions
Uncontrolled terms:CO emissions - Emission change - Emission performance - HC emissions - Low load
Classification code:451.1 Air Pollution Sources - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 612.2 Diesel Engines - 804 Chemical Products Generally - 804.2 Inorganic Compounds
DOI:10.3969/j.issn.1002-6819.2012.05.007
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 42>
Accession number:20121314899906
Title:Study on detection of tomato mosaic disease at early stage based on infrared thermal imaging
Authors:Xu, Xiaolong (1); Jiang, Huanyu (1); Hang, Yuelan (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
Corresponding author:Jiang, H.(hyjiang@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:145-149
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:As leaf temperature and transpiration was negative related, infrared thermal imaging technology was used to study the relationship of temperature changes with the severity of tomato leaves infected by tomato mosaic virus under greenhouse condition, so as to provide a basis for the realization of early detection of tomato mosaic disease. The results showed that the temperature of lesions had a 0.5-1.2°C higher than the normal leaves, especially when the disease can not be observed by naked eyes, but it can be detected by thermography. So the temperature discrepancy can indicate the severity of infected leaves, and temperature difference also can be an important index to identify whether the tomato plant infected with tomato mosaic disease. The thermal infrared imaging technology used in the early detection of tomato mosaic disease is feasible.
Number of references:25
Main heading:Fruits
Controlled terms:Computer viruses - Diseases - Image acquisition - Imaging techniques - Temperature measurement - Thermography (imaging) - Thermography (temperature measurement) - Viruses
Uncontrolled terms:Greenhouse conditions - Infrared thermal imaging - Leaf temperature - Mosaic disease of tomato - Naked-eye - Temperature changes - Temperature differences - Thermal infrared imaging - Tomato leaves - Tomato mosaic virus - Tomato plants
Classification code:821.4 Agricultural Products - 746 Imaging Techniques - 742.1 Photography - 944.6 Temperature Measurements - 741 Light, Optics and Optical Devices - 461.9 Biology - 461.7 Health Care - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2012.05.024
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 43>
Accession number:20121314899895
Title:Design of automatic transmission control system used in forklift truck
Authors:Zhang, Bingli (1); Hu, Fujian (1); Dong, Yanwen (1)
Author affiliation:(1) School of Machinery and Automobile Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author:Zhang, B.(bingli_z@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:66-72
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:By matching the parameters of engine and hydraulic converter, the basic power shift schedule, which took the speed and throttle angle as input, was established. According to the different loading, the pressure of the oil pump was used as the adjusting parameter to adjust the shift schedule. Considering the ramp, the fuzzy adjusting strategy was adopted to adjust the foundational gear. The effective of the proposed method was validated in the test. The result indicated that as the loading increased, the shift points would increased about 2-5 km/h, so that the best power performance could be obtained. The forklift truck always ran with one gear on the lamp to avoid it sliding down. This proposed method can enrich the manipulating theory of forklift truck and could be applied in practice.
Number of references:20
Main heading:Trucks
Controlled terms:Control systems - Design - Loading - Materials handling equipment - Transmissions
Uncontrolled terms:Adjusting parameters - Automatic transmission control - Fork lift trucks - Hydraulic converters - Oil pump - Power performance - Power shift - Ramp control - Rapid control prototyping - Shift schedule - Shifting schedule - Throttle angle
Classification code:408 Structural Design - 602.2 Mechanical Transmissions - 663.1 Heavy Duty Motor Vehicles - 691.1 Materials Handling Equipment - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2012.05.012
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 44>
Accession number:20121314899913
Title:Technical research on sludge drying by solar energy and heat pump
Authors:Rao, Binqi (1); Cao, Li (2)
Author affiliation:(1) College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China; (2) Zhejiang Lüzhi Sludge Treatment Technology Co. Ltd., Hangzhou 310013, China
Corresponding author:Rao, B.(raobinqi@cjlu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:184-188
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to solve the problems of sludge drying, the working principle and system structure of sludge drying-system by solar energy and heat pump were introduced firstly, and then the main equipment of this system was calculated and designed, the system performance was analyzed comprehensively through experiment. Finally the energy efficiency and economy of solar energy heat pump drying-system were compared with that of the other drying system. The results showed that this system was energy-saving, eco-friendly and economy. Equipped with solar thermal collector, the system can save energy about 10% in average. The research can provide a reference for engineering application of sludge drying by solar energy and heat pump.
Number of references:17
Main heading:Drying
Controlled terms:Energy efficiency - Heat pump systems - Sludge disposal - Solar energy
Uncontrolled terms:Drying systems - Eco-friendly - Engineering applications - Heat pumps - Save energy - Sludge drying - Solar thermal collector - System structures - Technical research - Working principles
Classification code:452.2 Sewage Treatment - 525.2 Energy Conservation - 615.2 Solar Power - 641.2 Heat Transfer - 642.1 Process Heating
DOI:10.3969/j.issn.1002-6819.2012.05.031
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 45>
Accession number:20121314899916
Title:Comparison of ethanol production from different sugar feedstocks by solid state fermentation with two yeast strains
Authors:Han, Bing (1); Fan, Guifang (1); Li, Shizhong (1); Wang, Li (1); Li, Tiancheng (1)
Author affiliation:(1) Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Corresponding author:Li, S.(szli@tsinghua.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:201-206
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to find out suitable raw materials and strains for ethanol production by solid state fermentation, three kinds of sugar crops and two yeast strains were tested to compare their characteristics of ethanol/sugar conversion. One of the two strains investigated is TSH-CGMCC1949 strain, screened from sweet sorghum plant, and the other one is Angel yeast, generally used in current alcohol industry. The three kinds of sugar crops investigated were sugar cane, sugar beet and sweet sorghum stalks. The results showed that, with the same feedstock input quantity, the ethanol production from sugar beet was the highest, following by sweet sorghum, because of different initial sugar content. In order to eliminate the effect caused by varied sugar content, ethanol yield (g ethanol/g sugar consuming) was employed to compare the fermentation efficiency. Sweet sorghum stalks had attained the highest ethanol yield of the three materials. TSH performed some advantages through the contrast to AGL. TSH had shorted the fermentation period by nearly 6 h, and the ethanol yield was higher than that with AGL. The results indicated that, TSH had a wide substrate rage, applicable to many sugar crops in addition to sweet sorghum.
Number of references:20
Main heading:Sugars
Controlled terms:Agricultural wastes - Chemical industry - Crops - Ethanol - Feedstocks - Fermentation - Strain - Sugar beets - Sugar cane - Yeast
Uncontrolled terms:Alcohol industry - Ethanol production - Ethanol yield - Fermentation efficiency - Solid-state fermentation - Sugar content - Sugar feedstock - Sweet sorghum - Yeast strain
Classification code:821.5 Agricultural Wastes - 821.4 Agricultural Products - 805.1.1 Biochemical Engineering - 805 Chemical Engineering, General - 951 Materials Science - 804.1 Organic Compounds - 803 Chemical Agents and Basic Industrial Chemicals - 801.2 Biochemistry - 421 Strength of Building Materials; Mechanical Properties - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2012.05.034
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 46>
Accession number:20121314899924
Title:Evaluation on suitability of rural residential land in Three Gorges Reservoir region
Authors:Guo, Yueting (1); Liao, Heping (2); Xu, Jiangang (3)
Author affiliation:(1) School of Geographic and Oceanographic Science, Nanjing University, Nanjing 210093, China; (2) School of Geographical Sciences, Southwest University, Chongqing 400715, China; (3) School of Architecture and Urban Planning, Nanjing University, Nanjing 210093, China
Corresponding author:Xu, J.(xjg129@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:252-259
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:The Three Gorges Reservoir region is a typical ecological sensitive area. Wushan county in Chongqing is situated in the central area of Three Gorge district. Its poor soil, extremely fragile ecological environment and stagnate economics are the major obstacles during development. Based on ArcGIS10 and cost weighted distance method, seven indexes involving the natural factors, economic factors, social factors and environment factors that affected the location of rural residential were chosen to evaluate suitability of rural residential land in this research. The result of suitability evaluation of rural residential land in Wushan county was graded into four classes, optimal, suitable, basically suitable and unsuitable rural residential land, accounting for 9.52%, 50.87%, 34.58%, 5.03% of total area of rural residential land respectively. Researches on rural residential land suitability, optimal land resources exploitation and utilization according to root physical factors and reality economy development conditions are the key countermeasures to solve the ecological environment problems. Suitability evaluation of rural residential land in this region is not only favorable to land resources exploitation and utilization, but also beneficial to land conservation and regional sustainable development.
Number of references:27
Main heading:Ecology
Controlled terms:Conservation - Economics - Land use - Natural resources - Optimization - Rural areas
Uncontrolled terms:ArcGIS - Chongqing - Ecological environments - Economic factors - Environment factors - Land conservation - Land resources - Land suitability - Multi-factor - Natural factors - Physical factors - Regional sustainable development - Sensitive area - Social factor - Suitability evaluation - Three Gorges - Three Gorges Reservoir region - Weighted distance
Classification code:971 Social Sciences - 921.5 Optimization Techniques - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 512 Petroleum and Related Deposits - 501 Exploration and Prospecting - 454.3 Ecology and Ecosystems - 454 Environmental Engineering - 444 Water Resources - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2012.05.042
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 47>
Accession number:20121314899925
Title:Evaluation of land eco-security in Wanjiang district base on entropy weight and matter element model
Authors:Yu, Jian (1); Fang, Li (2); Cang, Dingbang (4); Zhu, Lin (1); Bian, Zhengfu (1)
Author affiliation:(1) College of Environment and Spatial Informatics, China University of Ming and Technology, Xuzhou 221116, China; (2) College of Territorial Resources and Tourism, Anhui Normal University, Wuhu 241003, China; (3) Anhui Key Laboratory of Natural Disaster Process and Prevention, Wuhu 241003, China; (4) School of Management, China University of Ming and Technology, Xuzhou 221116, China
Corresponding author:Yu, J.(yujian2033@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:260-266
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Focusing on the problems of method disunity, information shield and subjectivity of the evaluation of land eco-security in China, this paper evaluated land eco-security of Ma'anshan, Hefei, Wuhu, Xuancheng, Anqing, Chuzhou, Chizhou, Chaohu and Tongling nine cities in Wanjiang district with the theory of entropy weight and matter element model, and the results were compared with that by comprehensive evaluation method. The entropy weight method includes following steps: building system of assessing factors, setting up field of the factors for classifying eco-security, constructing model of entropy and matter element analysis, calculating relevancy between the factor and land eco-security, making out the weight of every factors. The result showed that the land eco-security of Ma'anshan was more dangerous, followed by Chizhou, Anqing. Xuancheng, Hefei and Chuzhou were safe. The grade of Wuhu, Chaohu and Tongling were of a safer trend, which was consistent with the result of comprehensive assessment. The main factors of land eco-security in Wanjiang district included pesticide capacity per-unit area, amount of SO<inf>2</inf> per GDP, water resource capacity per capita, density of people, forest coverage ratio, proportion of arable land area over 25 slope, and ratio of worked exhaust gas and so on. The information of comprehensive quality can be obtained by method of comprehensive assessment, while by method of matter element model, the discrete information of single factor and the steady status can be described in addition to the comprehensive quality. Therefore, matter-element model is valuable in land eco-security assessment.
Number of references:22
Main heading:Entropy
Controlled terms:Ecology - Mathematical techniques - Models - Rating - Sulfur dioxide - Water resources
Uncontrolled terms:Arable land - Building systems - Comprehensive assessment - Comprehensive evaluation - Comprehensive qualities - Constructing models - Coverage ratio - Discrete information - Eco-security - Entropy weight - Entropy weight method - Entropy weights - Matter-element analysis - Matter-element model - Per capita - Resource capacity - Steady status
Classification code:921 Mathematics - 902.2 Codes and Standards - 902.1 Engineering Graphics - 804.2 Inorganic Compounds - 641.1 Thermodynamics - 454.3 Ecology and Ecosystems - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.05.043
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 48>
Accession number:20121314899884
Title:Infrastructure of standard system for agricultural engineering construction in China
Authors:Shi, Yanqin (1); Zhao, Yuelong (1); Li, Xiaoguang (1); Li, Shujun (1); Yang, Yini (1)
Author affiliation:(1) Institute of Agricultural Engineering Standard Quota, Chinese Academy of Agricultural Engineering, Beijing 100125, China
Corresponding author:Zhao, Y.(long2003918@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:5
Issue date:March 1, 2012
Publication year:2012
Pages:1-5
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Agricultural engineering is one of important contents for modern agriculture. Agricultural engineering construction standard is a technological measure to implement the goal for the agricultural engineering construction. Agricultural engineering construction standard system is a programmatic document for constructing and revising standards and standardization of agricultural engineering. On the basis of national standard system and engineering construction standard system, the paper proposed the standard system infrastructure of agricultural engineering construction, and it was pointed out that the composition of the standard system should abide by the principle of overall planning and all round consideration and break through term by term. And the standard system should include the farmland infrastructure construction, agricultural production capacity construction and agricultural production facilities construction. The standard system infrastructure of agricultural engineering construction can be described with hierarchical structures and three-dimensional coordinates, so as to provide a basis for guiding the agricultural standardization construction.
Number of references:18
Main heading:Agricultural engineering
Controlled terms:Agriculture - Standardization - Standards
Uncontrolled terms:Agricultural productions - Construction standards - Hierarchical structures - Infrastructure - Infrastructure construction - National standard - Standard system - Three dimensional coordinate
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 902.2 Codes and Standards
DOI:10.3969/j.issn.1002-6819.2012.05.001
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
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