<RECORD 1>
Accession number:20123515381906
Title:Development and experiment of intra-row mechanical weeding device based on trochoid motion of claw tooth
Authors:Hu, Lian (1); Luo, Xiwen (1); Yan, Yi'an (1); Chen, Xiongfei (1); Zeng, Shan (1); Zhang, Long (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China; (2) College of Engineering, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Luo, X.(xwluo@scau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:10-16
Language: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 achieve the intra-row precision mechanical weeding, an intra-row weed mechanical control device was designed based on the trochoid motion of the weeding claw tooth. The principles of weeding and crop plants avoiding were studied. And the corresponding mathematical model of the intra-row weed mechanical control device was established. The trochoid motion parameters for weed control were analyzed. The experiment of avoiding crop plants damage for the intra-row weed mechanical control device was tested on the experimental platform. Result showed that the time for switching from weeding state to crop plant avoiding state and for switching back was able to meet the switching requirement. Damaging crop plants in indoor tests was less than 8%. The intra-row weed mechanical control device was able to meet the intra-row weeding requirement for crops with a plant spacing of 20cm and larger, and ensure available weeding claw tooth for each intra-row area. The forward speed of weeding device did not affect the number of entering the intra-row region, but the increasing of forward speed would cause an increase injury rate of seedlings. The number of the claw tooth entering the intra-row area was not relevant with the uniformity of the crop plant spacing, but the crop plant spacing. This study provides a basis for precision control of intra-row mechanical weed control device.
Number of references:28
Main heading:Crops
Controlled terms:Agricultural machinery - Control - Experiments - Mathematical models - Speed - Weed control
Uncontrolled terms:Control device - Crop plants - Experimental platform - Forward speed - Indoor test - Injury rate - Mechanical control - Mechanical weeding - Motion parameters - Plant spacing - Precision control - Trochoid motion
Classification code:921 Mathematics - 901.3 Engineering Research - 821.4 Agricultural Products - 931.1 Mechanics - 821.1 Agricultural Machinery and Equipment - 732 Control Devices - 731 Automatic Control Principles and Applications - 803 Chemical Agents and Basic Industrial Chemicals
DOI:10.3969/j.issn.1002-6819.2012.14.002
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 2>
Accession number:20123515381942
Title:Effect of mechanical pretreatment technology for raw meat on qualities of porcine sliced ham
Authors:Xu, Baocai (1); Sun, Jianqing (1); Han, Yanqing (1); Zhou, Hui (1); Li, Jingjun (1); Wang, Xiaoxiao (2)
Author affiliation:(1) State Key Laboratory of Meat Processing and Quality Control, Yurun Group, Nanjing 210041, China; (2) College of Food Science and Engineer, Yangzhou University, Yangzhou, 210021, China
Corresponding author:Sun, J.(sunjq729@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:250-255
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To improve water exuding, textures and edible quality of porcine ham, the effects of five raw meat mechanical treatments on porcine sliced ham quality characteristics were investigated. The five mechanical treatments included only tumbling, post-injection tumbling, post-tenderization tumbling, post-injection tenderization and tumbling, post- grinding with broadsword and tumbling. Hams were prepared of Quadriceps femoris from prok hind leg muscle. Water binding characteristics (cooking loss, expressible moisture (EM), pasteurization water loss), textural characteristics (hardness, springiness, cohesiveness, chewiness), color parameters and sensory quality of hams were detected. The results showed that injection or tenderization could help to significantly decrease the cooking loss and expressible moisture of the hams, and the lowest cooking loss of hams made by post-injection tenderization and tumbling treatment was 7.90%. The hams subjected to post- grinding with broadsword and tumbling exhibited the lowest pasteurization water loss, which was 2.66%. Besides, the hams made by post-injection tenderization and tumbling treatment and the post-grinding with broadsword and tumbling treatment exhibited the lowest pasteurization water loss which was significantly lower than that in the other treatments. Injection and tenderization improved the hardness, cohesiveness and chewiness of the products. The hams manufactured by post-injection tenderization and tumbling treatment showed better texture characteristics than those made by only one treatment or combination of two treatments. However, among the five mechanical treatments, the hams made by post- grinding with broadsword and tumbling treatment exhibited the largest hardness, cohesiveness and chewiness properties. In addition, injection and tenderization improved the lightness and redness, but decreased the yellowness of the hams. Sensory evaluation results indicated that the only tumbling treatment resulted in the worse sensory qualities of the hams, there were no significant differences in sensory qualities between the two kinds of hams which were made by post-injection and post-tenderization tumbling. The sensory textures and sliceability of the hams produced by post-injection tenderization and tumbling treatment were less than those hams made by post- grinding with broadsword and tumbling treatment, but higher visibility of meat matrix and better colour properties were exhibited. Therefore, it's suggested that in industrialized production by post-injection tenderization and tumbling of raw meat porcine sliced ham has the best qualities.
Number of references:24
Main heading:Meats
Controlled terms:Barreling - Grinding (machining) - Hardness - Injection (oil wells) - Moisture - Pasteurization - Quality assurance - Textures - Water quality
Uncontrolled terms:Blade tenderization - Color parameter - Colour properties - Industrialized production - Leg muscles - Mechanical pre-treatment - Mechanical treatments - Quality characteristic - Sensory evaluation - Sensory qualities - Sliceability - Sliced ham - Textural characteristic - Texture characteristics - Water binding - Water loss
Classification code:933 Solid State Physics - 913.3 Quality Assurance and Control - 822.3 Food Products - 822.2 Food Processing Operations - 951 Materials Science - 801.4 Physical Chemistry - 511.1 Oil Field Production Operations - 453.2 Water Pollution Control - 421 Strength of Building Materials; Mechanical Properties - 606.2 Abrasive Devices and Processes
DOI:10.3969/j.issn.1002-6819.2012.14.038
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 3>
Accession number:20123515381923
Title:Characteristics and analysis of soil erosion in Li country after Wenchuan earthquake based on GIS and USLE
Authors:Guo, Bing (1); Tao, Heping (1); Liu, Bintao (1); Jiang, Lin (3)
Author affiliation:(1) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; (2) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; (3) College of Resources and Environmental, Chengdu University of Information Technology, Chengdu 610225, China
Corresponding author:Tao, H.(thp@imde.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:118-126
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to more accurately evaluate soil erosion of Li country, Wenchuan earthquake-stricken area, Sichuan province, potential and actual soil erosion was qualitatively analyzed using the combination method of GIS, RS and USLE, and a brief comparison of soil erosion before and after earthquake was conducted. Moreover, changes of soil erosion area about different erosion intensity and the soil erosion amount were studied from four aspects, including slope, slope aspect, land use patterns and elevation. The results showed that soil erosion in Li country amounted to 844.46 million tons in the whole year and the average soil erosion was 1957.79 t/(km<sup>2</sup>·a), belonging to the moderate erosion. Compared with before earthquake, the areas of soil erosion were enlarged in mild, intensive and extreme regions especially at the region with slope more than 30-50 degree, altitude more than 2000-3000 m, as well as aspect of south and west slope. Further, the results provide a better basis for the reconstruction and the conservation of the soil erosion in Li country.
Number of references:30
Main heading:Erosion
Controlled terms:Earthquakes - Geographic information systems - Remote sensing - Sediment transport - Soil conservation - Soils
Uncontrolled terms:Combination method - Earthquake-stricken area - Erosion intensity - Land use pattern - Sichuan province - Slope aspect - Soil erosion - Universal soil loss equation - Wenchuan Earthquake
Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 484 Seismology - 723.3 Database Systems - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2012.14.019
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 4>
Accession number:20123515381926
Title:Estimation of crop yield using CERES-Wheat model based on particle filter data assimilation method
Authors:Jiang, Zhiwei (1); Chen, Zhongxin (1); Ren, Jianqiang (1); Zhou, Qingbo (1)
Author affiliation:(1) Key Laboratory of Agri-informatics, Ministry of Agriculture, Beijing 100081, China; (2) Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Corresponding author:Chen, Z.(zxchen@mail.caas.net.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:138-146
Language: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 validate the feasibility of particle filter algorithm for crop yield estimation using crop growth model as well as accuracy, the data assimilation system of CERES-Wheat (crop environment resource synthesis for wheat) model was integrated. The ground observation was employed to perform an experiment to test the capability of data assimilation system for crop yield estimation. The effect of particle dimension and perturbed variance on accuracy and efficiency was also discussed. The results showed that CERES-Wheat data assimilation system based on particle filter could correctly adjust the trajectory of model states and significantly improve the precision of forecasted crop yield. The coefficient of determination R<sup>2</sup> between simulated and observed winter wheat yields before and after performing PF assimilation scheme increased from 0.68 to 0.83, normalized root mean square error (NRMSE) from 4.93% to 3.40%, and relative error (RE) from 4.15% to 2.93%. For the trials of perturbed particle size and variance, there were no significant improvement when particle size increased from 50 to 250, but the computation time increased by 5 times. As perturbed variance of particles increased, NRMSE and RE increased by 0.32% and 0.26%, respectively. Therefore, the disturbed dimensions and variance of particles should be determined based on a compromised consideration of both the simulated precision and computed cost. This study provides a valuable reference for monitoring crop growth and yield estimation on regional scale using multi-sources remote sensing data.
Number of references:49
Main heading:Estimation
Controlled terms:Crops - Data acquisition - Mean square error - Models - Nonlinear filtering - Remote sensing
Uncontrolled terms:CERES-Wheat - Coefficient of determination - Computation time - Crop environment resource synthesis - Crop growth and yields - Crop growth model - Crop yield - Data assimilation - Data assimilation methods - Data assimilation systems - Ground observations - Leaf Area Index - Model state - Model-based OPC - Particle dimensions - Particle filter - Particle filter algorithms - Regional scale - Relative errors - Remote sensing data - Root mean square errors - Winter wheat
Classification code:723.2 Data Processing and Image Processing - 731.1 Control Systems - 821.4 Agricultural Products - 902.1 Engineering Graphics - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.14.022
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 5>
Accession number:20123515381912
Title:Numerical calculations for internal flow field in centrifugal pump impeller
Authors:Tan, Lei (1); Cao, Shuliang (2); Wang, Yuming (1); Bing, Hao (2); Zhu, Baoshan (2)
Author affiliation:(1) State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China; (2) State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
Corresponding author:Cao, S.(caoshl@mail.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:14
Issue date:July 15, 2012
Publication year:2012
Pages:47-51
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To solve the shortages of flow field calculation based on one dimension flow theory, a computer code was developed in Fortran language to calculate the internal flow field in centrifugal pump impellers based on continuity equation and motion equation. The iterative calculation was conducted by applying the finite-element method on the S<inf>1</inf> stream surface and the streamline-curvature method on the S<inf>2</inf> stream surface. The distributions of pressure and velocity in the impeller were obtained from the numerical calculation as the iteration converged. Results showed that the relative velocity distribution in the impeller was reasonable. The velocities at the blade head between pressure surface and suction surface were different due to the impact action of the fluid on blade head. The pressure in impeller increased gradually from impeller import to export and the pressure gradient was small. The pressure at the impeller inlet decreased from hub to shroud. Compared to the results of the traditional method, the meridional velocity distributions of this method based on both fluid continuity and motion equations were obviously different in each stream line from hub to shroud, with the maximum difference in the impeller inlet. The three-dimensional characteristic of the velocity distribution is distinct, which demonstrates that the numerical results of this method can reflect the three dimensional flow law more accurately.
Number of references:26
Main heading:Impellers
Controlled terms:Centrifugal pumps - Equations of motion - Finite element method - Flow fields - Numerical methods - Three dimensional - Velocity distribution
Uncontrolled terms:Centrifugal pump impellers - Computer codes - Continuity equations - Flow field calculation - Flow theories - Impact action - Impeller inlets - Internal flow field - Iterative calculation - Numerical calculation - Numerical results - One dimension - Pressure surface - Stream lines - Stream surface - Suction surfaces - Three-dimensional characteristics - Three-dimensional flow
Classification code:943.2 Mechanical Variables Measurements - 921.6 Numerical Methods - 921.2 Calculus - 902.1 Engineering Graphics - 631.1 Fluid Flow, General - 618.2 Pumps - 601.2 Machine Components
DOI:10.3969/j.issn.1002-6819.2012.14.008
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 6>
Accession number:20123515381930
Title:Analysis on wind resistance performance of ETFE membrane roof in aluminum alloy greenhouse
Authors:Qiao, Ke (1); Wu, Ming'er (1); Zhang, Qilin (1)
Author affiliation:(1) College of Civil Engineering, Tongji University, Shanghai 200092, China; (2) College of Engineering and Technology, Southwest University, Chongqing 400715, China
Corresponding author:Qiao, K.(qiaoke365@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:170-176
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to analyze the wind resistance performance of the ETFE membrane roof in aluminum alloy greenhouse and improve the design safety, mechanics parameters and stress-strain relationship for ETFE membrane were obtained based on uniaxial tensile test data. The basic equations of membrane element were derived based on the geometrical nonlinear finite element theory. The computation model for loading case analysis was established, after determined the initial shape of ETFE membrane used in arch framed roof by means of pedestal-shifting method through general finite analytic software-ANSYS. Membrane surface principal stress distribution and deformation characteristics of an example project were calculated under the condition of wind load, and the effects of different membrane surface prestress levels on load-bearing capacity were analyzed. Analysis results showed that the wind load mainly affected the first principal stress distribution of the arch ETFE membrane roof, and the proper increase of prestress could significantly improve its global stiffness and load-bearing capacity. This research provides references for arch ETFE membrane roof wind-resistance computational analysis and fabrication of the multi-span aluminum alloy greenhouse.
Number of references:35
Main heading:Membranes
Controlled terms:Aerodynamic loads - Aluminum alloys - Arches - Bearing capacity - Bridge cables - Computation theory - Greenhouses - Loading - Loads (forces) - Roofs - Stress concentration - Stress-strain curves - Tensile testing - Wind stress
Uncontrolled terms:Basic equations - Case analysis - Computation model - Computational analysis - Deformation Characteristics - Design safety - First principal stress - Geometrical nonlinear - Global stiffness - Initial shape - Load-bearing capacity - Membrane elements - Membrane roof - Membrane surface - Multi-spans - Pre-stress - Prestress levels - Stress-strain relationships - Uniaxial tensile test - Wind load - Wind resistance
Classification code:921 Mathematics - 672 Naval Vessels - 651.1 Aerodynamics, General - 541.2 Aluminum Alloys - 951 Materials Science - 422.2 Strength of Building Materials : Test Methods - 408.2 Structural Members and Shapes - 402.1 Industrial and Agricultural Buildings - 402 Buildings and Towers - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2012.14.026
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 7>
Accession number:20123515381913
Title:Numerical simulation and experiment on gas-liquid-solid multiphase flow in centrifugal pump
Authors:Fu, Qiang (1); Yuang, Shouqi (1); Zhu, Rongsheng (1); Chen, Jingjun (1); Wang, Xiuli (1)
Author affiliation:(1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Wang, X.(jsuwxl@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:52-57
Language: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 internal solid-liquid-gas flow of centrifugal pump, Pro/E 3D modeling software was used to make geometric modeling. Based on the application of Reynolds time-average equations, two-equation turbulence model and SIMPLEC algorithm, numerical simulation were involved in studying the flow rules of the solid-liquid-gas flow media in the centrifugal pump. Comparing the calculation results, the solid volume fraction reached the maximum at 0.4 of r/R2, then sharply declined in a straight line, and were fluctuating at certain point; the gas volume fraction was small at 0.2~0.4 of r/R2, and increased sharply after 0.4 of r/R2. Solid and gas phase concentration influenced each other in the particle size distribution. The gas phase mainly gathered in the middle of the blade, which made the vortex appear in the impeller passageway. The energy exchange and transmission in the passageway were influenced the emerging vortex. Without vortex in the passageway, the solid phase moved along the surface of the impeller; and with vortex, it moved with the rotation of the vortex. The flow track was rarely influenced with the increasing of solid phase concentration increases. The research provides a reference for the further research and application of gas-liquid-solid multiphase flow.
Number of references:20
Main heading:Liquids
Controlled terms:Centrifugal pumps - Computer simulation - Experiments - Flow of gases - Gases - Impellers - Multiphase flow - Particle size analysis - Three dimensional - Turbulence models - Vortex flow
Uncontrolled terms:3-d modeling - Energy exchanges - Flow media - Flow rules - Gas volume fraction - Gas-liquid-solid - Gas-phase concentration - Gasphase - Geometric modeling - Research and application - Reynolds - SIMPLEC algorithm - Solid volume fraction - Solid-phase - Solid-phase concentration - Two-equation turbulence models
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 901.3 Engineering Research - 723.5 Computer Applications - 951 Materials Science - 631.1.2 Gas Dynamics - 618.2 Pumps - 601.2 Machine Components - 631.1 Fluid Flow, General
DOI:10.3969/j.issn.1002-6819.2012.14.009
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 8>
Accession number:20123515381910
Title:Visual position of picking manipulator for disturbed litchi
Authors:Xiong, Juntao (1); Zou, Xiangjun (1); Chen, Lijuan (1); Cai, Weiliang (1); Peng, Hongxing (1)
Author affiliation:(1) Key Lab of Key Technology on Agricultural Machine and Equipment, College of Engineering, South China Agricultural University, Guangzhou 510642, China; (2) College of Informatics, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Zou, X.(xjzou1@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:36-41
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to solve the visual accurate positioning problem for litchi in disturbed state in the natural environment, the litchi disturbance factors in manipulator picking process were analyzed, and a simulation experiment platform of litchi vibration was designed and manufactured, which can simulate the vibration environment in the process of being picked based on changing vibration conditions including direction, vibration frequency, amplitude. The collection method of turbulent litchi image in the binocular stereo vision system was put forward using vibration platform motion parameters. Fuzzy C-means clustering method (FCM) was used to the pretreatment litchi image to segment litchi fruit and fruit stems in the HSI color space, and then the Hough transform algorithm was used to linear fitting determine the effective fruit picking area and picking point. Average values for picking point coordinates of multiple frame images were taken and then the space coordinate of picking point was determined using 3D reconstruction. The turbulent litchi visual position experimental results showed that the space position depth data error was less than 6 cm, and the litchi picking manipulator can realize effective picking. The study provides guidance for manipulator practical operation.
Number of references:20
Main heading:Manipulators
Controlled terms:Feature extraction - Fruits - Hough transforms - Image recognition - Image segmentation - Robots - Three dimensional - Vision
Uncontrolled terms:3D reconstruction - Average values - Binocular stereo vision system - Collection methods - Data errors - Disturbance factors - Disturbance simulation - Fuzzy c-means clustering method - Hough transform algorithms - HSI color space - Linear fitting - Litchi fruit - Multiple-frame - Natural environments - Point coordinates - Pre-Treatment - Simulation experiments - Space coordinates - Spatial positioning - Vibration condition - Vibration environment - Vibration frequency - Vibration platform - Visual position
Classification code:921.3 Mathematical Transformations - 902.1 Engineering Graphics - 821.4 Agricultural Products - 741.1 Light/Optics - 731.5 Robotics - 716 Telecommunication; Radar, Radio and Television - 461.4 Ergonomics and Human Factors Engineering
DOI:10.3969/j.issn.1002-6819.2012.14.006
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 9>
Accession number:20123515381947
Title:Process parameter optimization of breaking treatment for hard seed of Coronilla varia L.
Authors:Sun, Bugong (1); Wu, Jianmin (1); Zhao, Wuyun (1); Huang, Xiaopeng (1)
Author affiliation:(1) College of Engineering, Gansu Agricultural University, Lanzhou 730070, China; (2) College of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Corresponding author:Wu, J.(wujm@gsau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:283-287
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to break the hard seed of Coronilla varia L., the hard seed breaking machine was designed according to the major characteristics of Coronilla varia L. seeds. With three-factor quadric orthogonal regression composite experimental design, the influences of the space between two plates, the rotational speed difference between two plates and the bottom plate rotational speed were investigated, and the regression equation was obtained. The results showed that the effects of space and rotational speed difference between two plates on experimental target were extremely significant(p<0.01), and the effect of the bottom plate rotational speed on experimental target was significant (p<0.05). The optimum process parameters were as followed: 2 mm between two plates, 74 r/min of the rotational speed difference between two plates, 128 r/min of the bottom plate rotational speed for the breaking-machine. These results can provide technical guidance for the breaking hard seed in Coronilla varia L..
Number of references:22
Main heading:Speed
Controlled terms:Optimization - Parameter estimation - Regression analysis - Seed - Statistics
Uncontrolled terms:Bottom plate - Breaking-treatment - Coronilla varia L. - Orthogonal regression - Process parameter optimization - Process parameters - Regression equation - Rotational speed - Space between - Two plates
Classification code:731.1 Control Systems - 821.4 Agricultural Products - 921.5 Optimization Techniques - 922.2 Mathematical Statistics - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2012.14.043
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 10>
Accession number:20123515381922
Title:Optimization of irrigation frequency and application norm of phosphorus fertilizer for alfalfa in semiarid region of northern Shanxi province
Authors:Wang, Qingsuo (1); Sun, Dongbao (1); Hou, Xiangyang (2)
Author affiliation:(1) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, China; (2) Grassland Research Institute, Chinese Academy of Agricultural Sciences, Huhot 010010, China
Corresponding author:Wang, Q.(wang-qingsuo@ieda.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:112-117
Language: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 optimized the water and fertilizer application for alfalfa cultivation, growth and hay yield of alfalfa were studied in the semiarid region of northern Shanxi province. Four treatments of irrigation (W<inf>0</inf> with no irrigation, W<inf>1</inf> with irrigation of 75mm once, W<inf>2</inf> with irrigation of 75 mm twice, W<inf>3</inf> with irrigation of 75 mm three times) and three treatments of phosphorus fertilizer application (P<inf>0</inf> with 0 kg P<inf>2</inf>O<inf>5</inf>/hm<sup>2</sup>, P<inf>1</inf> with 105 kg P<inf>2</inf>O<inf>5</inf>/hm<sup>2</sup>, P<inf>2</inf> with 210 kg P<inf>2</inf>O<inf>5</inf>/hm<sup>2</sup>) were conducted by the split-plot design. Phosphorus fertilizer improved the winter hardiness of alfalfa, which exhibited delaying brown in autumn and earlier green in spring. Later flowering and less flowers of alfalfa for the second growth period in 2004 were shown with the increasing of irrigation times and phosphorus fertilizer application. The hay yield of alfalfa for the first harvest, the second harvest and the whole year in 2004 and 2005 were significantly increased with the irrigation times and phosphorus fertilizer application. The effects of irrigation or phosphorus fertilizer on alfalfa production were extremely significant, while the interactive effect of irrigation and phosphorus fertilizer was not significant. Two times irrigation (W<inf>2</inf>) for the first harvest and the second harvest, respectively, no irrigation (W0) and low phosphorus fertilizer application (P1) for the third harvest were recommended for alfalfa cultivation.
Number of references:24
Main heading:Irrigation
Controlled terms:Arid regions - Growth (materials) - Harvesting - Optimization - Phosphorus
Uncontrolled terms:Alfalfa - Fertilizer applications - Flowering - Interactive effect - Irrigation frequency - Phosphorus fertilizer - Second growth - Semi-arid climate - Semi-arid region - Split-plot design - Winter hardiness
Classification code:443 Meteorology - 444 Water Resources - 804 Chemical Products Generally - 821.3 Agricultural Methods - 921.5 Optimization Techniques - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2012.14.018
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 11>
Accession number:20123515381921
Title:Effects of hedgerows and ridge cultivation on losses of nitrogen and phosphorus of slope land in Three Gorges Reservoir area
Authors:Xia, Lizhong (1); Ma, Li (1); Yang, Linzhang (1); Liu, Guohua (1); Li, Yundong (1)
Author affiliation:(1) Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Corresponding author:Xia, L.(lzxia@issas.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:104-111
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Protective management of arable slope land plays an important role in protection of land resource and aquatic environment in Three Gorges region, China. Base on the regional natural conditions and the utilization of the arable slope land, four tillage modes with H1 (rotation of wheat and maize, wheat intercropped with horse bean, less tillage and ridge cultivation), H2 (rotation of wheat and maize, with Vetiveria ziz anioides contour hedges intercropped at slop length interval of 5m), H3 (rotation of wheat and maize, with alfalfa contour hedges intercropped at slop length interval of 5m), H4 (rotation of wheat and maize, conventional management) were conducted from Oct. 2009 to Oct. 2011. The differences of apparent recovery efficiency and Agronomic efficiency of applied nitrogen and phosphorus between treatments were discussed, as well as nitrogen and phosphorus losses through slope land surface runoff were analyzed. The results showed that compared with H4, H1 increased phosphorus use efficiency by 0.06 kg/kg. No significant difference of biological and economic production, apparent recovery efficiency and agronomic efficiency of applied nitrogen and phosphorus was observed among H2, H3 and H4, which showed intercropping with Vetiveria ziz anioides or alfalfa contour hedges wouldn't lead to the reduction of production. Furthermore significant effects on reducing soil erosion and sediment phosphorus loss were observed for H1, H2 and H3. Compared with H4, and sediment losses for H1, H2 and H3 decreased by 48.46%, 52.26% and 58.59% respectively, and sediment phosphorus losses decreased by 30.58%, 47.70% and 44.58% respectively.
Number of references:30
Main heading:Phosphorus
Controlled terms:Agricultural machinery - Agronomy - Efficiency - Fences - Nitrogen - Rotation - Runoff - Sedimentology - Sediments
Uncontrolled terms:Apparent recovery - Aquatic environments - Contour hedges - Economic production - Land resources - Land surface - Natural conditions - Phosphorus loss - Phosphorus use efficiencies - Sediment loss - Slope land - Soil erosion - Three Gorges Region - Three gorges reservoir area
Classification code:913.1 Production Engineering - 821.3 Agricultural Methods - 821.1 Agricultural Machinery and Equipment - 804 Chemical Products Generally - 601.1 Mechanical Devices - 483 Soil Mechanics and Foundations - 481.1 Geology - 444.1 Surface Water - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2012.14.017
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 12>
Accession number:20123515381927
Title:Comparisons and classification system of typical remote sensing indexes for agricultural drought
Authors:Sun, Hao (1); Chen, Yunhao (1); Sun, Hongquan (2)
Author affiliation:(1) State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China; (2) Department of Water Hazard Research, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
Corresponding author:Chen, Y.(cyh@bnu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:147-154
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Various remote sensing indexes of agriculture drought were proposed at present, but it is hard to decide which one is the most appropriate. In this paper, an intercomparison among 13 remote sensed indexes for monitoring agricultural drought was performed using MODIS products. Then a classification system was constructed for these indexes, where the applicability of each class was demonstrated. The results indicated that these indexes were not exactly the same because different indexes used different features of land surface to represent agricultural drought. Consequently, these indexes were classified into four categories: reflecting soil moisture change, reflecting canopy temperature change, reflecting vegetation water content change, and reflecting crop form and greenness change. The first category was suitable for agricultural drought early warning and soil type agricultural drought monitoring, where the Modified Perpendicular Drought Index could effectively represent changes in the soil surface moisture, and was suitable for monitoring changes temporally. The second category was not only suitable for drought early warning, but also more suitable for drought monitoring, where the Temperature Vegetation Drought Index based on the LAI-LST feature space was recommended. The third and fourth categories were more suitable for early warning and assessment of agricultural drought disaster. The present paper provides a reference for the selection of remote sensing indexes for monitoring agricultural drought.
Number of references:25
Main heading:Drought
Controlled terms:Agriculture - Classification (of information) - Monitoring - Remote sensing - Soil moisture - Space optics - Vegetation
Uncontrolled terms:Agricultural drought - Canopy temperature - Classification system - Drought indices - Drought monitoring - Early warning - Feature space - Intercomparisons - Land surface - Monitoring change - Soil surfaces - Soil types - Vegetation drought indices - Vegetation water content
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 741.1 Light/Optics - 716.1 Information Theory and Signal Processing - 483.1 Soils and Soil Mechanics - 444 Water Resources - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2012.14.023
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 13>
Accession number:20123515381908
Title:Design and experiment on flexible combing brush seed metering device for forage
Authors:Yang, Song (1); Zhang, Shumin (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Zhang, S.(zsm1957@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:24-30
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Slender shape and insufficient fluidity of some varieties of forage seeds lead to the bridging or blockage problem under sowing condition. To solve this problem, a mechanical combing method was proposed to improve uniformity of the forage seeder. A prototype of flexible combing forage seeder was developed. The length of seed outlet was determined, which was 48-55 mm. The sowing uniformity experiment was conducted and the mean coefficient of variation of Chinese Leymus and Tall Fescue was 28.54% and 21.28%, respectively, which met the Chinese national standard requirements. The results also showed that flexible combing forage seeder could perform successfully and avoid seed damage. This research can provide reference for the development of seed metering devices and grass seeders.
Number of references:23
Main heading:Experiments
Controlled terms:Agricultural machinery - Flexible structures - Seed
Uncontrolled terms:Chinese national standard - Coefficient of variation - Forage grass - Seed damage - Seed metering devices - Seeder - Tall fescue
Classification code:408.2 Structural Members and Shapes - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.14.004
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 14>
Accession number:20123515381915
Title:Acceleration strategy for vehicle with electronic control and hydrostatic drive
Authors:Wang, Cheng (1); Yi, Gang (2); Chang, Lü (1); Wu, Yonghai (1); Xu, Shanzhen (1)
Author affiliation:(1) Faculty of Transportation Engineering, Huaiyin Institute of Technology, Huai'an 223003, China; (2) School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Corresponding author:Wang, C.(wangcheng6657@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:65-70
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to meet the requirement of the driver and the demand in vehicle dynamics when the vehicle with electronic control and hydrostatic drive accelerates, the acceleration control strategy for vehicle with electronic control and hydrostatic drive based on the theory of hydraulic motor control system in constant-pressure network was studied. The initial pressure regulating scheme and the command speed regulating scheme were proposed. The simulation on the fuel economy and acceleration performance was developed using MATLAB/SIMULINK based on mathematic model of the system and on the designed acceleration drive controller. The simulation results indicated that the two accelerating control strategies proposed in this paper could meet the driver's acceleration requirement, the command speed regulating scheme has a better fuel economy and the initial pressure regulating scheme has a better acceleration power performance. The research results can provide reference for the acceleration control of the vehicle with electronic control and hydrostatic drive.
Number of references:17
Main heading:Computer simulation
Controlled terms:Acceleration - Acceleration control - Control - Fuel economy - Hydraulic motors - Hydraulics - Hydrodynamics - Industrial electronics - Mathematical models - Servomechanisms - Vehicles
Uncontrolled terms:Acceleration performance - Acceleration strategies - Control strategies - Electronic controls - Hydrostatic drives - In-vehicle - Initial pressure - Mathematic model - MATLAB /simulink - Motor control system - Power performance - Research results - Simulation - Speed-regulating
Classification code:931.1 Mechanics - 715 Electronic Equipment, General Purpose and Industrial - 716 Telecommunication; Radar, Radio and Television - 723.5 Computer Applications - 731 Automatic Control Principles and Applications - 732 Control Devices - 921 Mathematics - 714 Electronic Components and Tubes - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 631.2 Hydrodynamics - 521 Fuel Combustion and Flame Research - 432 Highway Transportation - 705 Electric Generators and Motors
DOI:10.3969/j.issn.1002-6819.2012.14.011
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 15>
Accession number:20123515381943
Title:Process optimization on alcohol production using sweet potato residue by simultaneous saccharification and fermentation method
Authors:Wang, Xian (1); Zhang, Miao (1); Mu, Taihua (1)
Author affiliation:(1) Division of Fruit and Vegetable Processing, Institute of Agro-Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (2) College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi 830052, China
Corresponding author:Mu, T.(mutaihuacaas@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:256-261
Language: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 comprehensive utilize sweet potato starch industrial waste residue, simultaneous saccharification and fermentation (SSF) method was optimized to produce alcohol using sweet potato residue. Plackett-Burman design was used to select significant factors among 9 factors which had influenced on alcohol fermentation. Based on the selected results, steepest ascent method was used to approach the optimal region and response surface methodology was adopted to identify optimal values of significant factors. The results indicated that the effects of glucoamylase, inoculation ratio and fermentation temperature on alcohol fermentation was significant (P<0.05). The optimal conditions for alcohol fermentation were as follows: α-amylase 8 U/g, liquefying time 1.5 h, liquefying temperature 90°C, mass fraction of ammonium sulfate 0.15 g/100 g, pH value 4, fermentation time 36 h, glucoamylase 151 U/g, inoculation ratio 0.3% and fermentation temperature 36°C. Under the optimum conditions, alcohol concentration was 17.15%, which was close to theoretical predicted value(16.95%). The optimum technology provides reference for the alcohol production technology by SSF method for sweet potato residue.
Number of references:25
Main heading:Fermentation
Controlled terms:Alcohols - Optimization - Surface properties
Uncontrolled terms:Alcohol concentrations - Alcohol fermentation - Ammonium Sulfate - Fermentation temperature - Glucoamylase - Industrial waste residue - Mass fraction - Optimal conditions - Optimal regions - Optimal values - Optimum conditions - pH value - Plackett-Burman - Plackett-Burman designs - Production technology - Response surface methodology - Simultaneous saccharification and fermentation - Sweet potato - Sweetpotato starch
Classification code:802.2 Chemical Reactions - 804.1 Organic Compounds - 921.5 Optimization Techniques - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2012.14.039
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 16>
Accession number:20123515381920
Title:Effects of waterlogging at gain filling stage on corn yield, nitrogen and phosphorus leaching loss
Authors:Zhou, Xinguo (1); Han, Huiling (1); Li, Caixia (2); Guo, Shulong (2); Guo, Dongdong (2); Cheng, Jinping (2)
Author affiliation:(1) Institute of Urban and Rural Construction, Agricultural University of Hebei, Baoding 071001, China; (2) Farmland Irrigation Research Institute, Chinese Academy of Agriculture Science, Xinxiang 453003, China
Corresponding author:Han, H.(cjhhi@hebau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:99-103
Language: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 testing-hole experiment was conducted to investigate the effect of waterlogging at grain filling stage on the yield of maize and the leaching loss of nitrogen and phosphorus. The results showed the maximum content of total nitrogen of 2.037 and 1.833mg/L occurred in the fifth day, under the underground water table in 30 cm and in 50 cm respectively. The content of total phosphorus came to the peak value in the third day at 0.163 mg/L and 0.148 mg/L under the underground water table in 30 cm and in 50 cm respectively. Waterlogging depth of 30 cm more than 3 days and 50 cm more than 5 days can cause maize yield decreased significantly. Therefore, it is very important to control the proper underground water level and waterlogging days for corn grain formation at grain filling stage of maize in the rainy season. This research provides reference for design and management of controlled drainage in farmland.
Number of references:24
Main heading:Nitrogen fixation
Controlled terms:Experiments - Groundwater - Irrigation - Leaching - Nitrogen - Phosphorus - Water levels
Uncontrolled terms:Controlled drainage - Corn - Corn grain - Corn yields - Filling stage - Grain filling - Leaching loss - Maize yield - Peak values - Phosphorus leaching - Rainy seasons - Total nitrogen - Total phosphorus - Underground water table - Waterlogging - Yield
Classification code:901.3 Engineering Research - 821.3 Agricultural Methods - 804 Chemical Products Generally - 802.2 Chemical Reactions - 614.2 Steam Power Plant Equipment and Operation - 533.1 Ore Treatment - 444.2 Groundwater
DOI:10.3969/j.issn.1002-6819.2012.14.016
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 17>
Accession number:20123515381941
Title:Integrated calibration of line-scan high spectral imaging system for agricultural products
Authors:Wang, Haihua (1); Li, Changying (2); Mei, Shuli (1); Li, Minzan (1)
Author affiliation:(1) Key Laboratory on Modern Precision Agriculture System Integration Research of MOE, China Agricultural University, Beijing 100083, China; (2) University of Georgia, Department of Biological and Agricultural Engineering, GA 31793, United States
Corresponding author:Li, M.(limz@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:244-249
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Hyperspectral imaging (HSI) technology has been used widely in agriculture and food industry. The paper discussed the integration and calibration methods for a line-scan HSI system, such as the sequence of the system adjustment, scanning speed and position control of the linear slide, spectral accuracy calibration, and spatial distortion calibration of the spectral image. Detailed methods and steps were provided to ensure the high fidelity of the image. The "smile" and "keystone" distortions of the spectral images were also taken into account. The calibration results showed that the spectral and spatial errors were 1.26 nm and 0.03 mm, respectively. A quadratic equation was used to correct the wavelength positions based on the standard spectrum of a Krypton lamp. It is proved that this method provided preferences to prepare image acquisition system quickly and efficiently.
Number of references:19
Main heading:Calibration
Controlled terms:Agricultural products - Deformation - Integration - Scanning
Uncontrolled terms:Calibration method - Food industries - Hyperspectral Imaging - Image acquisition systems - Linear slide - Quadratic equations - Scanning speed - Spatial distortion - Spatial errors - Spectral accuracy - Spectral images - Spectral imaging system - Wavelength position
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921.2 Calculus - 821.4 Agricultural Products - 741.3 Optical Devices and Systems - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2012.14.037
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 18>
Accession number:20123515381909
Title:Development and experiment of marching-type inter-cultivation weeder for paddy
Authors:Qi, Long (1); Ma, Xu (1); Tan, Zuting (2); Tan, Yongxin (2); Qiu, Qiaodong (2); Yang, Cheng (2); Zhang, Wencheng (3)
Author affiliation:(1) Key Lab. of Key Tech. on Agricultural Machine and Equipment (South China Agricultural University), Ministry of Education, Guangzhou 510642, China; (2) College of Engineering, South China Agricultural University, Guang Zhou 501642, China; (3) Agricultural Research Institute of Zhaoqing, Zhaoqing 526070, China
Corresponding author:Ma, X.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:31-35
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to solve the problem of mechanical weeding in paddy field and enhance the function of the exiting agricultural machine, a marching type inter-cultivating weeder was designed and tested in the paddy field by refitting a marching-type transplanter in this study. The designed machine was powered with the chassis of a marching type transplanter and composed of frame, power transmission system, mechanism of profiling and depth control and complex weeder including finger roller and blade roller which realized functions of pulling and bury-pressing on weeds during operation. Results of the field experiment showed that under the conditions that the forward velocity of the weeding machine was equipped with complex weeder 0.5 m/s and the weeding depth 50 mm, the cleaning rate was 83.7% and the injury rate of rice seedlings was 4.1%, and work effectively in paddy fields with large and high weeds.
Number of references:21
Main heading:Agricultural machinery
Controlled terms:Cultivation - Depth profiling - Environmental protection - Experiments
Uncontrolled terms:Agricultural machine - Cleaning rate - Composite components - Depth control - Field experiment - Forward velocity - Injury rate - Inter-cultivating weeder - Mechanical weeding - Paddy fields - Power transmission systems - Rice seedlings - Weeding machines
Classification code:454.2 Environmental Impact and Protection - 801 Chemistry - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.14.005
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 19>
Accession number:20123515381931
Title:Development of environment monitoring systems for greenhouse based on Proteus and Keil software
Authors:Zeng, Yu (1); Song, Yongduan (1); Wang, Bikun (1)
Author affiliation:(1) School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Corresponding author:Song, Y.(songyd_ncat@yahoo.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:177-183
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:Aiming at overcoming the shortcomings of the design methods of agricultural monitoring system, a new approach was investigated to develop greenhouse environment monitoring systems where air temperature, air humidity, CO2 concentration can be online measured and monitored. A fundamentally different embedded system design method named Joint-Debugging of Proteus and Keil was proposed, which significantly reduced the development cycle and hardware costs. C# language was adopted to develop PC monitoring software and Access Data Base was used to store and manage the historical data. Several system key issues including key data processing, serial interrupt data-flow building, Access Database design, Proteus and PC communications were well solved. The experimental results show that the system runs well and verifies the effectiveness of the proposed methods.
Number of references:22
Main heading:Monitoring
Controlled terms:Carbon dioxide - Computer debugging - Data processing - Database systems - Embedded software - Embedded systems - Greenhouses
Uncontrolled terms:Agricultural monitoring - Air humidity - Air temperature - CO2 concentration - Database design - Dataflow - Design method - Development cycle - Environment monitoring system - Greenhouse environment - Hardware cost - Historical data
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 - 804.2 Inorganic Compounds - 722 Computer Systems and Equipment - 402.1 Industrial and Agricultural Buildings - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2012.14.027
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 20>
Accession number:20123515381925
Title:Image recognition of camellia fruit based on preference for aiNET multi-features integration
Authors:Li, Xin (1); Li, Lijun (1); Gao, Zicheng (1); Zhou, Jian (1); Min, Shuhui (1)
Author affiliation:(1) School of Mechanical and Electrical Engineer, Center South University of Forestry and Technology, Changsha 410004, China
Corresponding author:Li, L.(junlili1122@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:133-137
Language: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 promote the recognition rates of machine-vision system in camellia fruit picking robot, the paper proposed the method of multi-feature integration using preference aiNet as the recognition algorithm. Based on the image procession of camellia fruit, the color feature, the morphology feature and the texture feature of the object region were clustered and the multi-features of camellia fruits were taken as the preference antibody, so the parameters of multi-features made effective integration in the preference aiNet. The simulation proved the accuracy of multi-feature integration reached 90.15% in the sunny day and 93.90% in the cloudy day, and the time complexity was nearly the same. This research has a certain meaning in application of forestry picking robot and provided the reference for further research of the camellia fruit picking robot.
Number of references:21
Main heading:Computer vision
Controlled terms:Feature extraction - Fruits - Image processing - Image recognition - Image texture - Integration - Robots
Uncontrolled terms:Artificial immune networks - Color features - Machine vision systems - Object region - Picking robot - Recognition algorithm - Recognition rates - Texture features - Time complexity
Classification code:716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 731.5 Robotics - 821.4 Agricultural Products - 921.2 Calculus
DOI:10.3969/j.issn.1002-6819.2012.14.021
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 21>
Accession number:20123515381924
Title:Optimal operation model for microgrid in rural areas
Authors:Jing, Tianjun (1); Tan, Yuangang (1); Yang, Minghao (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Yang, M.(mhyang@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:127-132
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the efficiency of renewable energy generation, and keep safe and stable for microgrid, a real-time optimization dispatching model for micogrid with direct current was built to obtain the maximum power energy. The model was solved in two-stage way method. At last, the optimized model for microgrid dispatching improved the power energy output, the life and operating conditions of the battery.
Number of references:22
Main heading:Rural areas
Controlled terms:Energy management - Optimization - Press load control
Uncontrolled terms:Dc micro-grid - Direct current - Maximum power - Micro grid - Operating condition - Optimal operation - Optimization models - Power energy - Real-time optimization - Renewable energy generation
Classification code:525 Energy Management and Conversion - 731.3 Specific Variables Control - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2012.14.020
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 22>
Accession number:20123515381929
Title:Traceability service system for agricultural products by using hybrid encoding
Authors:Fang, Wei (1); Cui, Chaoyuan (1); Song, Liangtu (1)
Author affiliation:(1) Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China
Corresponding author:Fang, W.(wfang@iim.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:164-169
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Because of backward technology of supervision and low price of products, the circulation system of Agricultural Products especially its information chain is still imperfect. A traceability service system for products was developed using hybrid encoding method based on electric labels of RFID and NetScreen code or Two-dimensional code. The system oriented to serve several kinds of users and includes sensing layer, data layer and service layer. The encoding methods, security measures and the processes of quality traceability were introduced, and a backtracking algorithm for computing of three layers tracing-code was also studied in the paper. The demonstration of the system shows that the system is valuable in reducing usage cost of labels and saving storage space of server as well. Moreover, the system integrates the functions of business supply chain etc. The system plays an important role in purifying the products market, protecting farmers' benefits as well as establishing a good brand image of the enterprise.
Number of references:20
Main heading:Agricultural products
Controlled terms:Encoding (symbols) - Information systems - Radio frequency identification (RFID) - Security systems - Supply chains
Uncontrolled terms:Backtracking algorithm - Brand image - Circulation systems - Codes - Data layer - Encoding methods - Hybrid Encoding - Quality traceabilitys - Screen - Security measure - Sensing layers - Service layers - Service systems - Storage spaces - Three-layer - Traceability service
Classification code:914.1 Accidents and Accident Prevention - 913 Production Planning and Control; Manufacturing - 912 Industrial Engineering and Management - 903.2 Information Dissemination - 821.4 Agricultural Products - 731.1 Control Systems - 723.2 Data Processing and Image Processing
DOI:10.3969/j.issn.1002-6819.2012.14.025
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 23>
Accession number:20123515381939
Title:Succession law and model of reclaimed soil quality of opencast coal mine dump in grassland
Authors:Wang, Jinman (1); Yang, Ruixuan (1); Bai, Zhongke (1)
Author affiliation:(1) College of Land Science and Technology, China University of Geosciences, Beijing 100083, China; (2) Key Laboratory of Land Consolidation and Rehabilitation Ministry of Land and Resources, Beijing 100035, China
Corresponding author:Bai, Z.(baizk@cugb.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:229-235
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Soil quality change is to measure soil productivity level and soil environmental quality. The dynamic succession law of Inner Mongolia mining waste dump reclaimed soil quality (Soil bulk density, Organic matter, Available P, Available K, Total N, Alkali Hydrolysable N, pH value, Electrical Conductivity) were summarized through the typical residential survey in this paper, and soil succession model of the study area were constructed by using indexes sum method. Results showed that the Organic matter, Available P, Available K, Total N, Alkali Hydrolysable N content in study area soil increased and all the soil quality gradually closed to its content in original landform. Soil succession model using indexes sum method showed study area already improved soil quality status, and gradually closed to the original landform soil quality. This study provides the theoretical basis for land reclamation and ecological restoration in ecological fragile mining area of opencast dump.
Number of references:20
Main heading:Geologic models
Controlled terms:Biogeochemistry - Biological materials - Coal mines - Ecology - Electric conductivity - Land reclamation - Landforms - Organic compounds - Soils
Uncontrolled terms:Available P - Ecological restoration - Electrical conductivity - Environmental quality - Inner Mongolia - Mining areas - Mining waste - N content - Opencast Coal Mine - pH value - Reclaimed soil - Soil bulk density - Soil productivity - Soil quality - Study areas - Succession law - Succession model - Theoretical basis - Waste dumps
Classification code:804.1 Organic Compounds - 701.1 Electricity: Basic Concepts and Phenomena - 503.1 Coal Mines - 483.1 Soils and Soil Mechanics - 481.2 Geochemistry - 481.1 Geology - 461.2 Biological Materials and Tissue Engineering - 454.3 Ecology and Ecosystems - 442.2 Land Reclamation
DOI:10.3969/j.issn.1002-6819.2012.14.035
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 24>
Accession number:20123515381945
Title:Effects of different pretreatments on specific heat of forage maize
Authors:Wang, Hongying (1); Li, Niwei (1); Gao, Rui (1); Yang, Jie (1); Kang, Hongbin (1)
Author affiliation:(1) College of Engineering, China Agriculture University, Beijing 100083, China
Corresponding author:Wang, H.(hongyingw@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:269-276
Language: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 heat and mass transfer properties of corn-based feedstuffs during the process of conditioning, extrusion and cooling, the effects of drying temperature (45-105°C), moisture content (12%-16%) wet basis, particle size (0.2-0.6 mm) on the specific heat of corn grain were investigated using a continuous differential scanning calorimeter (DSC) method. The experiments in three factors with five levels were designed by quadratic orthogonal rotation approach. A model of specific heat of corn grain versus dry temperature, moisture content and particle size was established by regression analysis and response surface methodology (RSM). The results showed that the minimum specific heat of corn grain was obtained(2051 J/(kg·K)) under the processing condition of drying temperature 45°C, moisture content 12% wet basis, and particle size 0.6 mm. This model can be used to evaluate the specific heat of corn grain processing in different conditions and to provide a reference for thermal processing of similar feedstuffs.
Number of references:25
Main heading:Drying
Controlled terms:Differential scanning calorimetry - Moisture - Moisture determination - Particle size - Regression analysis - Specific heat
Uncontrolled terms:Corn grain - Differential scanning calorimeters - Drying temperature - Feedstuffs - Heat and mass transfer - Pre-Treatment - Pre-treatments - Processing condition - Quadratic orthogonal rotation - Response surface methodology
Classification code:641.1 Thermodynamics - 642.1 Process Heating - 801.4 Physical Chemistry - 922.2 Mathematical Statistics - 943.2 Mechanical Variables Measurements - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2012.14.041
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 25>
Accession number:20123515381937
Title:Dynamic change and prediction of land use in Harbin city based on CA-Markov model
Authors:Gong, Wenfeng (1); Yuan, Li (2); Fan, Wenyi (3)
Author affiliation:(1) College of Hydraulic and Electrical Engineering, Heilongjiang University, Harbin 150086, China; (2) College of Information and Computer Engineering, Northeast Forestry University, Harbin 150040, China; (3) College of Forestry, Northeast Forestry University, Harbin 150040, China
Corresponding author:Fan, W.(fanwy@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:216-222
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To explore the spatio-temporal evolution law of land use and driving mechanism in urbanization of Harbin city, based on the data of Landsat TM images in 1989, 2001 and 2007 and Geo-Information TUPU theory, the distribution land use pattern in past 18 years was analyzed by RS and GIS. At the same time, based on the land use pattern in 2007, by using CA-Markov model, the land use patterns and the spatial pattern distribution of the equilibrium state in 2025 were forecasted. The results showed: the land use pattern was mainly dominated by cropland, area proportion of which exceeded 60%, followed by the forestland and the resident land; the spatial distribution of stable type atlas was wide-ranging and its area proportion was the greatest, the "cropland &rarr cropland &rarr cropland" was the greatest area change model, second model was "forestland &rarr forestland &rarr forestland", and the least proportion area was the stable change type, meanwhile, the greatest area change model was "unused land &rarrcropland &rarrforestland"; the simulation result by the CA-Markov indicated that the cropland would continue to reduce from 2025 to the ultimate states, while resident land would keep increasing, and the cropland &rarr resident land was mainly change trace; other land uses kept dynamic balance statues for their relatively small variation capacity. The research results provide a scientific basis for land planning and management and regional economy developing.
Number of references:24
Main heading:Forestry
Controlled terms:Geographic information systems - Land use - Markov processes - Regional planning - Remote sensing - Spatial distribution
Uncontrolled terms:Area-changes - CA-Markov - Driving mechanism - Dynamic balance - Dynamic changes - Equilibrium state - Forest land - Geo-information Tupu - Land planning - Land use pattern - Landsat TM images - Regional economy - Research results - RS and GIS - Small variations - Spatial distribution patterns - Spatial patterns - Spatiotemporal evolution - Urbanization
Classification code:922.1 Probability Theory - 921 Mathematics - 821.0 Woodlands and Forestry - 731.1 Control Systems - 723.3 Database Systems - 403.2 Regional Planning and Development - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2012.14.033
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 26>
Accession number:20123515381905
Title:Top strategy design of comprehensive land consolidation in China
Authors:Yan, Jinming (1); Xia, Fangzhou (1); Li, Qiang (1)
Author affiliation:(1) Department of Land Management, Renmin University of China, Beijing 100872, China
Corresponding author:Yan, J.(yanjinming@263.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:1-9
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:At present, the career of China's land consolidation is in unprecedented strategic opportunity period. Now the development of land consolidation is facing a totally new situation, new opportunities, but also many serious challenges, which needs land consolidation strategy's top-level design guidelines. Based on the analysis of the strengths, weaknesses, opportunities and threats of the comprehensive land consolidation, the strategic context of comprehensive land consolidation in China was revealed in this study. According to the comprehensive land consolidation strategy design ideas and principles, the national level comprehensive land consolidation strategic positioning was put forward, strategic goals and tasks of the comprehensive land consolidation were cleared, the overall design concept of the strategic model of urban-rural and rational co-ordinate and the future comprehensive land consolidation strategy were established, the comprehensive land consolidation strategy safeguard mechanism was designed. So reasonable development of comprehensive land consolidation strategy and the proper implementation can be ensured from the macro level, and the bottleneck of social and economic development resources can be solved, which provide the strategic orientation support for the improvement of the prospectivity, coordination, stability and efficiency of comprehensive land consolidation pertinency.
Number of references:28
Main heading:Design
Controlled terms:Economics - Land use - Mechanisms - Strategic planning
Uncontrolled terms:Co-ordination mode - Economic development - National level - Objectives and tasks - Overall design - Strategic goals - Strategic models - Strategic opportunity - Strategic orientation - Strategic positioning - Strategy designs - Urban-rural
Classification code:403 Urban and Regional Planning and Development - 408 Structural Design - 601.3 Mechanisms - 912.2 Management - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2012.14.001
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 27>
Accession number:20123515381932
Title:Arrangement optimization of flat-plate solar collector arrays
Authors:Wei, Shengxian (1); Li, Ming (2); Zhang, Zhongyu (1); Chen, Guangxue (1); Shi, Youming (1); Yang, Huimin (1)
Author affiliation:(1) College of Physics and Electronic Engineering, Qujing Normal University, Qujing 655011, China; (2) Solar Energy Research Institute, Yunnan Normal University, Kunmin 650092, China; (3) Key Lab. of Yunnan Provincial Universities for Advanced Functional and Low Dimensional Materials, Qujing Normal University, Qujing 655011, China
Corresponding author:Wei, S.(pvtsxwei@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:184-189
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To optimize arrangements of solar collector arrays for installations on limited horizontal roofs, the daily shading model and solar radiation model of a large-scale solar collector array were built. The relationships between the latitude, the daily shading factor, the floor space and the solar radiation intercepted by a collector array and the aspect ratio of the collector array were deeply studied using these models. The results showed that the daily shading factor on winter solstice day increased with the latitude and the aspect ratio increasing for a large collector array (occupied area≥500 m<sup>2</sup>). The daily shading factor rapidly increased when the aspect ratio was ∈[1/10, 3/1) while it increased smoothly when the aspect ratio was ∈(3/1, 10/1]. For the collector array with occupied area ∈[50, 1000] m<sup>2</sup>, the smaller the floor space, the faster the increase of the daily shading factor with the aspect ratio increased. The distribution of the horizontal daily solar radiation on the representative day in winter months had influences on the optimum aspect ratio responding to the maximum solar radiation intercepted by the collector array. In view of the influence of solar radiation distributions and convenience for engineering applications, the aspect ratios of 5 different floor space collector arrays used in 13 different latitude cities in China were obtained. The results provide data support for arrangement optimization of the solar collector arrays.
Number of references:20
Main heading:Aspect ratio
Controlled terms:Floors - Models - Optimization - Solar collectors - Solar energy - Solar radiation - Sun
Uncontrolled terms:Arrangement - Collector arrays - Data support - Engineering applications - Flat-plate solar collectors - Floor space - Shading factor - Shading model - Solar radiation distribution - Solar radiation model - Winter months
Classification code:402 Buildings and Towers - 657.1 Solar Energy and Phenomena - 657.2 Extraterrestrial Physics and Stellar Phenomena - 902.1 Engineering Graphics - 921.5 Optimization Techniques - 943 Mechanical and Miscellaneous Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2012.14.028
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 28>
Accession number:20123515381911
Title:Design and low NO<inf>x</inf> emission effect of biomass briquette boiler with third air distribution type
Authors:Guo, Feiqiang (1); Dong, Yuping (1); Dong, Lei (2); Jing, Yuanzhuo (2); Yan, Yongxiu (2)
Author affiliation:(1) Key Laboratory of High Efficiency and Clean Mechanical Manufacture Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China; (2) Shandong Baichuan Tongchuang Energy Company Ltd, Jinan 250101, China
Corresponding author:Guo, F.(shandaguofeiqiang@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:42-46
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to the combustion characteristics of biomass materials, a new boiler structure with three air distributions was designed, and the variation characteristics of the pollution gas emission and heat loss with the change of air distribution ratio and quantity were studied. The results showed that the mass concentration of NO<inf>x</inf> changed by changing the ratio of air distributions. When the ratio of the primary air, secondary air, and tertiary air was 7:1:2, the mass concentration of NO<inf>x</inf> got the minimum value of 83.45 mg/m<sup>3</sup>. With the increase of excess air coefficient, the mass concentrations of SO<inf>2</inf> and NO<inf>x</inf> decreased gradually; the flue dust concentration increased continuously; the total heat loss of the boiler decreased first and then increased. When excess air coefficient was 1.75, the total heat loss got the minimum value of 13.8%, and the mass concentrations of SO<inf>2</inf>, NO<inf>x</inf> and flue dust were 29.29, 83.03 and 74.90 mg/m<sup>3</sup> respectively. This research provides the theory basis for the combustion boiler design and operation of biomass briquette with low NO<inf>x</inf> emission.
Number of references:21
Main heading:Heat losses
Controlled terms:Biomass - Boilers - Briquets - Combustion - Enthalpy - Fly ash - Gas emissions - Sulfur dioxide
Uncontrolled terms:Air distribution - Biomass materials - Boiler structure - Combustion boilers - Combustion characteristics - Excess air coefficient - Flue dust - Mass concentration - Minimum value - Primary air - Secondary air - Tertiary air - Variation characteristics
Classification code:641.2 Heat Transfer - 641.1 Thermodynamics - 614 Steam Power Plants - 804.2 Inorganic Compounds - 525.1 Energy Resources and Renewable Energy Issues - 521.1 Fuel Combustion - 451.1 Air Pollution Sources - 524 Solid Fuels
DOI:10.3969/j.issn.1002-6819.2012.14.007
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 29>
Accession number:20123515381936
Title:Quantitative analysis of relationship between economy growth and cultivated land change in China
Authors:Yao, Yuan (1); Li, Xiaoshun (1); Qu, Futian (2); Chen, Longqian (1)
Author affiliation:(1) Key Lab. for Land Environment and Disaster Monitoring of The State Bureau of Surveying and Mapping, China University of Mining and Technology, Xuzhou 221116, China; (2) China Land Problem Research Center, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Li, X.(lixiaoshun1983@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:209-215
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to traditional hypothesis that contradiction between economy development and land protection is increasingly intense, a new hypothesis that the relationship between economic growth and cultivated land changing can be expressed as Logistic curve based on the analysis of change of cultivated land at home and abroad. And then an empirical study was carried out using the national data. Results showed that during the period when the economic growth at abroad transformed from the primary stage to advanced stage in industrialization and urbanization process, the intensity of demand for cultivated land occupied by construction firstly increased and then decreased, which was similar to the Logistic curve. Comparison of different stages in China indicated that per capital economic growth and cultivated land changes had a consistent wave from 1998 to 2003, but then had an inconsistent wave after 2003. Empirical results showed that the relationship between economic growth and cultivated land changing in most provinces could pass the F test, and demonstrate the hypothesis at provincial level between 1988 and 2008 except for 8 provinces. The year 2002 with per capital GDP of 8759.2 Yuan was an inflection point at which the cultivated land changed from accelerated reduction to decelerated reduction. The total cultivated land amounts should not be less than 1.217×10<sup>6</sup> km<sup>2</sup> after 2009. The inflection points and the limit of cultivated land scales had big differences in different regions. The research provides a scientific basis and direct reference for cultivated land protection and public policy adjustments in China.
Number of references:20
Main heading:Land use
Controlled terms:Economic analysis - Economics - Growth (materials)
Uncontrolled terms:China - Cultivated lands - Economic growths - Economy growth - Empirical studies - Hypothesis verifications - Inflection points - Logistic curves
Classification code:403 Urban and Regional Planning and Development - 911.2 Industrial Economics - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2012.14.032
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 30>
Accession number:20123515381946
Title:Assessment of spoilage progress for chilled tilapia fillets according to biogenic amines changes
Authors:Liu, Shouchun (1); Zhong, Saiyi (3); Ma, Changwei (1); Li, Pinglan (1); Yang, Xinting (2)
Author affiliation:(1) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; (2) National Engineering Research Center for Information Technology in Agriculture, Beijing, 100097, China; (3) College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524005, China
Corresponding author:Ma, C.(changweima@263.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:277-282
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the possibility and safety ranges of biogenic amines indicators for evaluating fish spoilage progress, reversed-phase high-performance-liquid-chromatography method was employed to detect the biogenic amines changes of tilapia fillets during chilled storage. The results showed that initial content of monoamines and polyamines in fresh fillets was high, and those of diamines was low. During chilled storage, monoamines and polyamines content showed fluctuating and decreasing trend. Cadaverine and putrescine content were decreased quickly and became the major biogenic amines. The cadaverine and putrescine relative indicators like diamines, biogenic amines index and total biogenic amines showed a similar increasing trend of cadaverine and putrescine. The correlation analysis showed that there were high correlation among cadaverine, putrescine, diamine, biogenic amines index, total biogenic amines with storage time, microbial counts and amine nitrogen. The regression analysis indicated that the relationship among the growth of pseudomonas, enterobacteriaceae and cadaverine and putrescine was inseparable. The indicators of cadaverine, putrescine and diamine could be used for evaluating fillet spoilage progress simply and effectively. Considering the toxicity of histamine and tyramine, biogenic amines index (BAI) were more suitable. The preliminary range of BAI for evaluating spoilage progress of chilled tilapia fillets were as follows: <20 mg/kg, fresh; 20-40 mg/kg, acceptable; >40 mg/kg, spoiled. These results would offer the basic data for standard limits of biogenic amines in chilled tilapia fillets.
Number of references:18
Main heading:Amines
Controlled terms:Correlation methods - Energy storage - Fish - Liquid chromatography - Regression analysis - Spoilage
Uncontrolled terms:Amine nitrogen - Biogenic amines - Chilled storage - Correlation analysis - Enterobacteriaceae - Microbial count - Microflora - Polyamines - Reversed phase - Storage time - Tilapia fillets
Classification code:922.2 Mathematical Statistics - 822 Food Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 801 Chemistry - 702 Electric Batteries and Fuel Cells - 471 Marine Science and Oceanography - 461.9 Biology - 461 Bioengineering and Biology
DOI:10.3969/j.issn.1002-6819.2012.14.042
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 31>
Accession number:20123515381940
Title:Effects of climate and land use changes on stream flow and sediment yield in Chaohe river basin
Authors:Guo, Junting (1); Zhang, Zhiqiang (1); Wang, Shengping (2); Yao, Ankun (1); Ma, Songzeng (1)
Author affiliation:(1) College of Water and Soil Conservation, Beijing Forestry University, Beijing 10083, China; (2) Energy and Research Center, North China Electric Power University, Beijing 102206, China
Corresponding author:Zhang, Z.(Zhqzhang@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:14
Issue date:July 15, 2012
Publication year:2012
Pages:236-243
Language: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 effects of climate and land use changes on water and sediment yield at multiple temporal scales in the watershed, the non-parametric Mann-Kendall test was used to identify the change trend and change points of annual precipitation, annual potential evapotranspiration (PET) and annual streamflow from 1961 to 2009 in the Chaohe watershed located in the upstream of Miyun Reservoir, Beijing, China. Water balance model was used to quantify the respective contribution of land use and climate changes to annual streamflow. Double mass cure was used to examine their effects on sediment yield reduction. The results indicated that there were no significant changes in annual precipitation and PET from 1961 to 2009. In contrast, the annual streamflow was significantly decreased from 1961 to 2009 with the change points occurred in 1999. Annual sediment yield significantly declined and the change point occurred in 2004. The land use/cover changes contributed 56.1% reduction in mean annual streamflow, while the rest was caused by climate variability. Land use changes contributed 98.05% of reduction for the declining of sediment yield. Land use changes were the main factor for the reduction of water resources and sediment yield. Developing the reasonable land use scenario for utilizing the water and soil resources, implementing the ecological restoration programs were the basic approaches for the adaptive watershed management strategies.
Number of references:26
Main heading:Sediments
Controlled terms:Climate change - Land use - Landforms - Reservoirs (water) - Sedimentology - Soil conservation - Stream flow - Water conservation - Water management - Water supply - Watersheds
Uncontrolled terms:Annual precipitation - Change trends - Change-points - Climate variability - Double mass - Ecological restoration - Land use/cover change - Land-use change - Land-use scenario - Mann-Kendall test - Miyun reservoir , Beijing , China - Non-parametric - Potential evapotranspiration - River basins - Sediment yields - Soil resources - Temporal scale - Water balance models - Water yield - Watershed management
Classification code:631.1 Fluid Flow, General - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 481.1 Geology - 451 Air Pollution - 446.1 Water Supply Systems - 446 Waterworks - 444.1 Surface Water - 444 Water Resources - 441.2 Reservoirs - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2012.14.036
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 32>
Accession number:20123515381935
Title:Assessments of suitability, energy capacity and environment impact on biodiesel from Jatropha curcas L.
Authors:Yin, Fang (1); Liu, Lei (1); Jiang, Dong (2); Ren, Hongyan (2)
Author affiliation:(1) College of Earth Science and Resources, Chang'an University, Xi'an 710054, China; (2) Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai, 200062, China; (3) Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Corresponding author:Yin, F.(yinf@lreis.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:201-208
Language: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 provide the basis for the development of biodiesel from Jatropha curcas L. (JCL), marginal land suitable for JCL planting and their spatial distribution, suitability degrees were investigated, then total net energy production potential and GHG emission reduction potential derived from large-scale planting of JCL in southwest of China were estimated. Multi-factor comprehensive analysis method was used to identify marginal land resources suitable for JCL cultivation, make suitability assessment, and obtain their spatial distribution, suitability degree and total amount. Then, using life cycle analysis (LCA) method, the life cycle net energy and greenhouse gas emission reduction capacity of marginal land resources with different suitability degrees for biodiesel production was calculated. The life cycle model was expanded to obtain the potentiality of total net energy production and greenhouse gas emission reduction of JCL plantation. The results showed that the areas of suitable and moderate suitable land resources for cultivating JCL were 1994500 and 5572800 hm<sup>2</sup>, respectively. Using these land resources, the maximum net production potential of biodiesel produced from JCL and the total greenhouse gas emission reduction capacity in each year would be 150991940 GJ and 15916550 t, respectively. The results can provide reference for biodiesel industry.
Number of references:22
Main heading:Gas emissions
Controlled terms:Biodiesel - Biomass - Diesel fuels - Emission control - Environmental impact assessments - Factor analysis - Greenhouse gases - Life cycle - Natural resources - Spatial distribution
Uncontrolled terms:Greenhouse gas emission reduction - Jatropha curcas - Life cycle analysis - Marginal land - Net energy
Classification code:922.2 Mathematical Statistics - 921 Mathematics - 913.1 Production Engineering - 525.1 Energy Resources and Renewable Energy Issues - 523 Liquid Fuels - 512 Petroleum and Related Deposits - 501 Exploration and Prospecting - 454.2 Environmental Impact and Protection - 451.2 Air Pollution Control - 451.1 Air Pollution Sources - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.14.031
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 33>
Accession number:20123515381918
Title:Effects of carbon content on transport and transformation discipline of nitrogen in soil with wastewater irrigation
Authors:Cheng, Xianjun (1); Xu, Di (1)
Author affiliation:(1) China Institute of Water Resources and Hydropower Research, Beijing 100048, China; (2) National Center for Efficient Irrigation Engineering Technology Research, Beijing 100048, China
Corresponding author:Cheng, X.(cheng-xj@iwhr.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:85-90
Language: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 understand the impact of carbon content on nitrogen transport and transformation in wastewater irrigation systems, soil column experiments were conducted. Soil columns with ryegrass growing in them were irrigated with primarily treated effluent (high carbon content) and secondarily treated effluent (low carbon content). Samples of irrigation water, soil solutions from 10, 40 and 70 cm beneath soil surface, and drainage were collected during each irrigation event for analysis of ammonia, nitrate and total nitrogen. Dry matter yields of ryegrass were recorded and total nitrogen in them were measured. The results showed that about 34% of the nitrogen from irrigation water was uptaken by crop, 62% was removed through denitrification or deposit in the soil nitrogen pool. The amount of nitrogen that infiltrated into soil deeper than root zone was only 3% - 4% of the amount in irrigation water. For the dry matter yield and the amount of nitrogen utilized by crop, columns irrigated with high carbon content wastewater were better than columns irrigated with low carbon content wastewater. Higher carbon content was benefit to the transformation of nitrogen, its uptaken by crop and removal through denitrification.
Number of references:18
Main heading:Nitrogen removal
Controlled terms:Carbon - Crops - Denitrification - Effluents - Irrigation - Nitrogen - Soil moisture - Wastewater - Water supply
Uncontrolled terms:Carbon content - Dry matter yield - High carbon content - Irrigation waters - Low carbon - Nitrogen transformations - Nitrogen transport - Root zone - Ryegrass - Soil column - Soil nitrogen - Soil solutions - Soil surfaces - Soil-column experiment - Total nitrogen - Transport and transformation - Treated effluent - Wastewater irrigation
Classification code:821.4 Agricultural Products - 821.3 Agricultural Methods - 804 Chemical Products Generally - 802.2 Chemical Reactions - 483.1 Soils and Soil Mechanics - 452.3 Industrial Wastes - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2012.14.014
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 34>
Accession number:20123515381914
Title:Simulation and analysis of flow field in large shear-type mixing tank
Authors:Dai, Ning (1); Zhang, Yuzhong (1); Zhang, Maolong (2); Yuan, Yang (1)
Author affiliation:(1) Department of Mechanical Engineering, Jiangnan University, Wuxi 214122, China; (2) Wuxi Qingda Food Equipment Co. Ltd, Wuxi 214122, China
Corresponding author:Zhang, Y.(zhang30398@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:58-64
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The flow field in large shear-type mixing tank has been investigated by using computational fluid dynamics (CFD) method. The flow type, pressure, velocity and turbulent dissipation rate in a mixing tank are simulated using ANSYS13.0 with standard k-Ε turbulence model and multiple reference frame method (MRF). It was found that negative pressure zone was expanded and liquid flow rate increased as impeller speed increased. The turbulence was enhanced and energy dissipation rate was high and concentrated in the area of high shearing device. The simulation results showed that fluid mixed significantly in the high shearing device. The results provided a reference for optimization design of the industrial mixing tank.
Number of references:28
Main heading:Mixing
Controlled terms:Computational fluid dynamics - Flow fields - Numerical analysis - Shearing - Shearing machines - Structural frames - Tanks (containers) - Turbulence models
Uncontrolled terms:Computational fluid dynamics methods - Energy dissipation rate - Flow type - Impeller speed - Liquid flow rates - Mixing tanks - Multiple-reference frames - Negative pressures - Optimization design - Shear-type - Simulation and analysis - Tank - Turbulent dissipation rates
Classification code:921.6 Numerical Methods - 802.3 Chemical Operations - 631.1 Fluid Flow, General - 619.2 Tanks - 604.1 Metal Cutting - 535.1 Metal Rolling - 408.2 Structural Members and Shapes
DOI:10.3969/j.issn.1002-6819.2012.14.010
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 35>
Accession number:20123515381917
Title:Respiration characteristics of cotton soil under irrigation and fertilization measures in arid region
Authors:Zhang, Qianbing (1); Yang, Ling (1); Sun, Bing (1); Zhang, Wangfeng (1); Luo, Honghai (1); Zhang, Yali (1); Wang, Jin (2)
Author affiliation:(1) Key Laboratory of Oasis Ecology Agriculture of Xinjiang Production and Construction Groups, College of Agriculture, Shihezi University, Shihezi, 832003, China; (2) Wulanwusu Agrometeorological Experiment Station of Xinjiang, Shihezi, 832003, China
Corresponding author:Zhang, W.(zhwf_agr@shzu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:77-84
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:To discuss the soil respiration rate and its relationship with soil temperature and moisture, two different irrigation methods including drip irrigation and flood irrigation and four fertilizer treatments including organic manure(OM), N P K fertilizer(NPK), combined application of NPK fertilizer and organic manure(NPK OM), and no fertilization(CK) were arranged during cotton growth period in Xinjiang oasis. Soil respiration rate, soil temperature and soil moisture were measured and analyzed under different irrigation methods and fertilizer treatments. The results showed that soil respiration rate of cotton field exhibited a significant seasonal variation feature, and soil respiration rate reached a peak in mid-July and reduced to the minimum in mid-October after cotton harvest; The diurnal variations of soil respiration rate showed a single peak curve, and the highest peak of full flowering stage appeared at 15:00-17:00 and full bolling stage appeared at 15:00 and the minimum value appeared at 04:00. Soil respiration rate under drip irrigation was larger than that under flood irrigation, and the soil respiration rate with (NPK OM) treatment was the highest, and then followed by OM, CK and NPK among the fertilizer treatments. The average temperature sensitivities of soil respiration under drip and flood irrigation were 2.03 and 2.43, respectively. The Q<inf>10</inf> value under drip irrigation was larger than that under flood irrigation. Under different irrigation and fertilizer measures, compound equation could predicted soil respiration rate, and the coefficient of determination was 0.64-0.72. Considering the effects of soil temperature and soil moisture content on soil respiration rate could improve the accuracy of the research into regional soil respiration rate.
Number of references:27
Main heading:Irrigation
Controlled terms:Arid regions - Cotton - Fertilizers - Manures - Soil moisture - Soils - Temperature
Uncontrolled terms:Coefficient of determination - Cotton growth - Diurnal variation - Drip irrigation - Flood irrigation - Flowering stage - Irrigation methods - Minimum value - Organic manure - Seasonal variation - Single peak - Soil respiration - Soil respiration rates - Soil temperature - Temperature sensitivity - Xinjiang
Classification code:443 Meteorology - 444 Water Resources - 483.1 Soils and Soil Mechanics - 641.1 Thermodynamics - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2012.14.013
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 36>
Accession number:20123515381938
Title:Spatial structure and fractal model of land use in Qingjian river basin of middle Yellow River
Authors:Guo, Biyun (1); Wang, Guangqian (1); Fu, Xudong (1); Zhang, Zhengfeng (2)
Author affiliation:(1) State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; (2) School of Public Administration, Renmin University of China, Beijing 100872, China
Corresponding author:Guo, B.(guobiyun@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:223-228
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to reveal the spatial differences and the change course of land use in the middle reaches of the Yellow River, taking the Qingjian River area in the middle reaches of the Yellow River as the case, the spatial evolution of the land use was analyzed through the land use gravity center migration theory and fractal theory, and the fractal structure model of sorted land spatial distribution pattern was built based on RS and GIS technology. The results showed that land-use focus migrated significantly from 1990 to 2009 in Qingjian River area. The gravity center of farm land and water migrated towards the southwest, and migration of water gravity towards the direction reached 7205.85 meters. Forest, construction land and unused land gravitated towards the southeast, and the focus of construction land migrated in the direction most, reaching 7421.89 meters. The focus of grassland moved 3546.38 meters to the northwest. During 1990-2009, the land fractal dimension of land use types decreased except water area, which indicated that the complexity of landscape types reduced in the region and the stability increased. Natural factors played a promoting role in the land use spatial variation; however it is human disturbance that played the main driving role. The article provides a scientific basis for reasonable land use plan and intensive land use in ecological restoration areas.
Number of references:31
Main heading:Land use
Controlled terms:Fractal dimension - Fractals - Geographic information systems - Remote sensing - Rivers
Uncontrolled terms:Construction land - Ecological restoration - Farm land - Fractal model - Fractal structures - Fractal theory - Gravity centers - Human disturbances - Land use type - Land-use plan - Landscape type - Natural factors - Promoting role - River basins - RS and GIS - Spatial differences - Spatial distribution patterns - Spatial evolution - Spatial structure - Spatial variations - Water areas - Yellow river
Classification code:403 Urban and Regional Planning and Development - 407.2 Waterways - 723.3 Database Systems - 731.1 Control Systems - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.14.034
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 37>
Accession number:20123515381919
Title:Effects of different tillage methods on soil water content and water productivity of silage summer maize
Authors:Li, Yan (1); Liu, Haijun (2); Huang, Guanhua (1)
Author affiliation:(1) College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) College of Water Sciences, Beijing Normal University, Beijing 100875, China; (3) State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
Corresponding author:Liu, H.(shanxilhj@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:14
Issue date:July 15, 2012
Publication year:2012
Pages:91-98
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Appropriate tillage and mulching practices can reduce soil evaporation and crop evapotranspiration, hence save irrigation water. Three widely used tillage methods, tillage (T treatment), stubble mulching without tillage (C treatment) and stubble burning without tillage (B treatment) were chosen to analysis the effect of these methods on soil water, soil evaporation, crops' growth, silage maize yield and water productivity. The results showed that with less rainfall amount in the 2010 season, soil water content in 0-20 cm in Treatment C was higher than those in T and B treatments. The amount of soil water stored in 0-120 soil layer in C treatment was higher than those in T and B treatments in both seasons. Soil evaporation in C treatment was the least as compared to the other two treatments. Silage maize yields under C treatment were higher by 11% and 9%, and water productivity was higher by 11.7% and 14.8% as compared to T and B treatments, respectively. In a conclusion, stubble mulching without tillage was a appropriate practice for reducing soil evaporation and increasing water productivity, and then was recommended as a optimal tillage practice for maize cultivation in Beijing area.
Number of references:25
Main heading:Agricultural machinery
Controlled terms:Crops - Evaporation - Irrigation - Phase transitions - Soil moisture - Soils - Water content - Water resources - Water supply
Uncontrolled terms:Beijing area - Crop evapotranspiration - Irrigation waters - Maize yield - Soil evaporations - Soil layer - Soil water - Soil water content - Stubble burning - Stubble without tillage - Summer maize - Tillage - Tillage methods - Tillage practices - Water productivity
Classification code:444 Water Resources - 446.1 Water Supply Systems - 483.1 Soils and Soil Mechanics - 801.4 Physical Chemistry - 802.3 Chemical Operations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2012.14.015
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 38>
Accession number:20123515381928
Title:Multi-agent collaborative methods for agricultural drought-resistant process
Authors:Li, Congdong (1); Gao, Yang (1); Feng, Shumin (2); Zhao, Yinghong (3)
Author affiliation:(1) School of Management, Tianjin University, Tianjin 300072, China; (2) Institute of Technology, China Agricultural University, Yantai 264670, China; (3) Hebei Res. Inst. of Invest. and Des. of Water Conservancy and Hydropower Ministry of Water Resources, Tianjin 300250, China
Corresponding author:Gao, Y.(Alex_g_y@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:155-163
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The semantic information descript by various agents was hard to comprehend, and the precision of attribute classification for semantic concept was low in agriculture drought mitigation process. In order to solve the problem, the multi-agent collaborative reasoning fitness model was established, based on the agriculture drought mitigation disposal process. At the same time, the multi-agency collaborative rule reasoning multi-objective robust optimization model was established to solve the multi-agent synergy rigid and widespread uncertainty problem in reasoning process. NSGA-II algorithm was used to solve calculation example, and the different risk levels of decision solutions were obtained. Simulation analysis showed that the method exhibited higher system stability and validity.
Number of references:32
Main heading:Drought
Controlled terms:Agriculture - Cloud computing - Multi agent systems - Semantics - System stability
Uncontrolled terms:Collaborative - Collaborative rule - Disposal process - Drought mitigation - Multi agent system (MAS) - Multi objective - NSGA-II algorithm - Reasoning process - Risk levels - Robust optimization - Semantic concept - Semantic information - Simulation analysis - Uncertainty problems
Classification code:444 Water Resources - 722.4 Digital Computers and Systems - 723.5 Computer Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 903.2 Information Dissemination - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2012.14.024
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 39>
Accession number:20123515381934
Title:Energy analysis on planting-breeding circulating agriculture ecosystem linked by biogas
Authors:Zhong, Zhenmei (1); Huang, Qinlou (1); Weng, Boqi (1); Huang, Xiusheng (1); Feng, Deqing (1); Chen, Zhongdian (1)
Author affiliation:(1) Fujian Engineering and Technology Research Center for Recycling Agriculture in Hilly Areas, Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
Corresponding author:Weng, B.(boqiweng@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:14
Issue date:July 15, 2012
Publication year:2012
Pages:196-200
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:Based on combining biogas engineering with planting, constructing circular agriculture model including planting and culture linked by biogas project is used to dealing with pig slurry at present. Taking model I(system with only pig-breeding) as a reference, cycle agricultural system of livestock farm in Xingyuan Fuqing (the modelII) was evaluated using energy theory. Results indicated that whole benefit of the modelII was better than the the modelI; Compared with the modelI, the modelII decreased environmental loading ratio by 15.00%, increased sustainable development index by 15.71% and increased economic benefits by 18.96%, however slightly lowered at production efficiency. It was concluded that the modelII realized the aim that "reduction of resource, material recycling and reuse", and then eco-efficiency and economic benefits had been improved. This paper provides a scientific basis for extension of cycle agricultural system with planting and breeding.
Number of references:20
Main heading:Agriculture
Controlled terms:Biogas - Computer systems - Energy management - Loading
Uncontrolled terms:Agricultural system - Agriculture ecosystems - Eco-efficiency - Economic benefits - Energy analysis - Environmental Loading Ratio - Material recycling - Pig slurries - Plants - Production efficiency - Resource utilizations
Classification code:522 Gas Fuels - 525 Energy Management and Conversion - 672 Naval Vessels - 722 Computer Systems and Equipment - 723 Computer Software, Data Handling and Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2012.14.030
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 40>
Accession number:20123515381907
Title:Design and experiment of oblique cutting and feeding device for sugarcane
Authors:Zhou, Yong (1); Ou, Yinggang (2); Mo, Zhaofu (2)
Author affiliation:(1) College of Engineering, Huazhong Agricultural University, Wuhan 430070, China; (2) Key Lab. of Key Tech. on Agricultural Machine and Equipment (South China Agricultural University), Ministry of Education, Guangzhou 510642, China
Corresponding author:Zhou, Y.(zhyong@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:14
Issue date:July 15, 2012
Publication year:2012
Pages:17-23
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the harvest quality, an oblique cutting and feeding device was designed and tests were conducted in this paper. The experiments of the cutting and feeding device included properties experiment and compatibility experiment of harvesting sugarcane in different growth state. Results showed that rupture rate was 20%, whole stalk rate 60%, feeding rate 100% and loss rate 12.6% under the condition that forward speed was 0.43m/s, knife plate speed 450rpm and knife plate dip angle 8°. Compatibility experiment result showed that sugarcane adaptability was better when relative position of sugarcane and the dual base cutter was minus 100 mm, lodging attitude angle 40°, slip angle 30°, and relative position of sugarcane and the dual base cutter was equal to minus 100 mm, lodging attitude angle 60°and slip angle 0.
Number of references:26
Main heading:Experiments
Controlled terms:Design - Equipment - Feeding - Harvesting - Sugar cane - Testing
Uncontrolled terms:Attitude angle - Dip angle - Feeding rate - Forward speed - Harvest quality - Knife plates - Loss rates - Oblique - Oblique cutting - Relative positions - Segment harvest - Slip angle
Classification code:901.3 Engineering Research - 901 Engineering Profession - 821.4 Agricultural Products - 821.3 Agricultural Methods - 691.2 Materials Handling Methods - 423.2 Non Mechanical Properties of Building Materials: Test Methods - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2012.14.003
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 41>
Accession number:20123515381916
Title:Test analysis of relationship between natural frequency and compaction degree for roadbed soil
Authors:Li, Jun (1); Zhou, Zhili (2); Li, Yan (1)
Author affiliation:(1) Faculty of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710003, China; (2) Vehicle and Motive Power Engineering School, Henan University of Science and Technology, Luoyang 471003, China; (3) Department of Mechanical Engineering, Luoyang Institute of Science and Technology, Luoyang 471003, China
Corresponding author:Li, J.(milediyi@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:71-76
Language: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 relationship between the natural frequency of roadbed soil and the soil compaction degree is the foundation for accurately establishing the relationship between the vibration signal of vibration roller and the compaction degree of soil and is the basis for effectively adjusting work parameters of vibratory roller to improve the compaction efficiency based on the real-time compaction condition of roadbed by online detecting vibration signal. Taken specific roadbed soil as study subjects, cylinder soil samples were made by homemade spiral compacting mechanism in this paper. Based on the modal analysis method and using INV306DF portable intelligent signal acquisition and processing analysis system, the natural frequency tests were done for different cylinder soil samples with different compaction degree. The function relation expression was obtained between natural frequency and compaction degree of roadbed soil. This study provides a reference for improving the intellectualized control system of vibratory roller.
Number of references:22
Main heading:Compaction
Controlled terms:Cylinders (shapes) - Modal analysis - Natural frequencies - Rollers (machine components) - Signal processing - Soil mechanics - Soil surveys - Soils
Uncontrolled terms:Analysis method - Analysis system - Compaction degree - Compaction efficiency - Natural frequency test - Online detecting - Relation expression - Signal acquisitions - Soil compaction - Soil sample - Test analysis - Vibration signal - Vibrations - Vibratory rollers
Classification code:921 Mathematics - 716.1 Information Theory and Signal Processing - 711.1 Electromagnetic Waves in Different Media - 601.2 Machine Components - 536.1 Powder Metallurgy Operations - 483.1 Soils and Soil Mechanics - 408.2 Structural Members and Shapes
DOI:10.3969/j.issn.1002-6819.2012.14.012
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 42>
Accession number:20123515381948
Title:Process parameters optimization of Nymphaea's hydraulic-gathering
Authors:Wu, Chuanyu (1); Fang, Wenxi (1); Zhang, Dehui (1)
Author affiliation:(1) Department of Electrical and Mechanical Engineering, Fujian Agricultural and Forestry University, Fuzhou 350002, China
Corresponding author:Fang, W.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 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 study the parameters of hydraulic-gathering technology in tuber of Nymphaea, the influences of experimental parameters of hydraulic-gathering effect of Nymphaea were investigated according to the wash principle of high pressure water jet. The L<inf>9</inf>(3<sup>4</sup>) orhogonal table of the hydraulic-gathering of Nymphaea was designed to cover process parameters such as water jet pressure, jet flow, speed, angle of jet scouring. The results showed that the four parameters significantly affected the hydraulic-gathering efficiency, the jet flow and jet pressure were the main factors for the hydraulic-gathering effect. The optimum parameter technology was as follow: 0.2 MPa of the water jet pressure, 15 mm of nozzle diameter, 0.71 m/min of speed and 0 of angle of jet scouring. The hydraulic-gathering efficiency was increased with the increasing of the jet pressure and jet flow. The increasing of the jet pressure consumed more power than that of the jet flow. So the higher water jet pressure was token priority at the condition of constant power.
Number of references:18
Main heading:Optimization
Controlled terms:Analysis of variance (ANOVA) - Hydraulic equipment - Parameter estimation
Uncontrolled terms:Constant power - Experimental parameters - High-pressure water jets - Hydraulic-gathering - Jet flow - Jet pressures - Nozzle diameter - Nymphaea - Optimum parameters - Orthogonal test - Process parameters - Water jet pressure
Classification code:632.2 Hydraulic Equipment and Machinery - 731.1 Control Systems - 921.5 Optimization Techniques - 922 Statistical Methods
DOI:10.3969/j.issn.1002-6819.2012.14.044
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 43>
Accession number:20123515381944
Title:Effect of hot-air drying on cell structure of fruit and vegetable parenchyma
Authors:Chang, Jian (1); Yang, Deyong (1); Lu, Qianqian (1); Liu, Xiangdong (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Yang, D.(ydy@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:14
Issue date:July 15, 2012
Publication year:2012
Pages:262-268
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Potato, apple and carrot were chosen to study the effect of hot-air drying on their microstructure. By using the paraffin technology, the micro-imaging technology and the image processing technology, the microstructure images under different moisture content during drying were obtained, and the effects of hot-air drying on the parameters, in terms of cell area, cell perimeter, cell equivalent diameter and cell roundness were analyzed from the cell parameters distribution curves under different moisture content. Fitting equations were built to describe the positive correlation between the cell parameter ratios and the moisture ratio during the hot-air drying. The results indicated that the cell changing with moisture content during drying could be predicted by the fitting equations. This study provided a theoretical basis for the quality control and the mathematical model of fruits and vegetables during hot-air drying.
Number of references:24
Main heading:Drying
Controlled terms:Cells - Cytology - Fruits - Image processing - Mathematical models - Microstructure - Moisture - Moisture determination - Paraffins - Vegetables
Uncontrolled terms:Cell parameter - Cell perimeters - Cell structure - Distribution curves - Equivalent diameter - Fitting equations - Fruit and vegetables - Hot air drying - Image processing technology - Micro-imaging - Moisture ratios - Positive correlations - Theoretical basis
Classification code:944.2 Moisture Measurements - 933 Solid State Physics - 921 Mathematics - 821.4 Agricultural Products - 951 Materials Science - 804.1 Organic Compounds - 741 Light, Optics and Optical Devices - 642.1 Process Heating - 461.2 Biological Materials and Tissue Engineering - 801.4 Physical Chemistry
DOI:10.3969/j.issn.1002-6819.2012.14.040
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 44>
Accession number:20123515381933
Title:Design and application of rural hydro-solar hybrid power system
Authors:Zhang, Rengong (1)
Author affiliation:(1) ZheJiang TongJi Vocational College of Science and Technology, Hangzhou 311231, China
Corresponding author:Zhang, R.(zrgmail2002@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:14
Issue date:July 15, 2012
Publication year:2012
Pages:190-195
Language: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 generation innovation model with two renewable energy mixed for rural hydropower and solar energy power, this paper discussed the design of a hybrid-type hybrid power generation system. Based on the system characteristics, the general design plan was designed. Focused on mixed DC systems harmonic suppression and reactive power compensation in construction technology, photovoltaic technology, shared-key technologies such as computer monitoring technology in hybrid power system design process were applied. Core technology made the application of photovoltaic power stations provide DC power supply for hydropower station and provided for the power grid harmonic suppression and reactive power compensation. The share-type technologies that share-type hydropower station computer monitoring technology and photovoltaic power stations shared local control unit, data communication networks, workstations, and servers, were cost-saving. Practices and calculations show that rural hydropower and solar hybrid power system designed saves a initial investment cost over 50%, and generates long-term harmonic suppression and reactive power compensation benefits; installed capacity per kW can save the normal vectors 0.4 kg and carbon dioxide emissions 0.997 kg. And the power system can realize protection and social benefits such as land and natural resource conservation.
Number of references:30
Main heading:Electric power measurement
Controlled terms:Carbon dioxide - Conservation - Design - Global warming - Harmonic analysis - Hydroelectric power - Power plants - Reactive power - Renewable energy resources - Solar energy - Solar power generation - Systems analysis - Technology - Water resources
Uncontrolled terms:Carbon dioxide emissions - Construction technologies - Core technology - Cost-saving - Data communication networks - DC power supplies - DC system - Design and application - Design plans - Harmonic suppression - Hybrid power - Hybrid power generation systems - Hybrid power systems - Hydropower stations - Installed capacity - Investment costs - Local control - Monitoring technologies - Normal vector - Photovoltaic power - Photovoltaic power generation systems - Photovoltaic technology - Power grids - Reactive power compensation - Renewable energies - Resource conservation - Social benefits - System characteristics
Classification code:961 Systems Science - 702.3 Solar Cells - 706 Electric Transmission and Distribution - 804.2 Inorganic Compounds - 901 Engineering Profession - 921.6 Numerical Methods - 942.2 Electric Variables Measurements - 615.2 Solar Power - 525.1 Energy Resources and Renewable Energy Issues - 454 Environmental Engineering - 451 Air Pollution - 444 Water Resources - 408 Structural Design - 611.1 Hydroelectric Power Plants
DOI:10.3969/j.issn.1002-6819.2012.14.029
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
期刊信息
- 主管单位 中国科学技术协会
- 主办单位 中国农业工程学会
- 主编 朱明
- 总编/社长 王应宽
- 地址 北京朝阳区麦子店街41号
- 邮编 100125
- 电话 010－59197078/7077/7076
- 邮箱 tcsae@tcsae.org
微信公众号
二维码
友情链接
- Bioresource Technology
- Industrial Crops and Products
- Biomass & Bioenergy
- Biosystems Engineering
- Aquacultural Engineering
- International Journal of Agricultural and Biological Engineering
- Journal of Irrigation and Drainage Engineering
- Paddy and Water Environment
- Journal of Agricultural Engineering
- Transactions of the ASABE
- Revista Brasileira de Engenharia Agricola e Ambiental
- Applied Engineering in Agriculture
- Engenharia Agricola
- AMA-Agricultural Mechanization in Asia Africa and Latin America
- 中华人民共和国农业农村部-MARA
- 中国科学技术协会CAST
- 国家新闻出版署
- 中华人民共和国科学技术部
- 国家自然科学基金委员会
- U.S. DEPARTMENT OF AGRICULTURE
- CIGR
- ASABE
- EurAgEng-European Society for Agricultural Engineers
- American Society of Agronomy
- Crop Science Society of America
- Soil Science Society of America
- 期刊界
- CNKI
- 万方数据
- 维普