2012年10月第28卷第20期

2012年10月第28卷第20期

Accession number:20124715692094
Title:Elimination of herbicide residue by soil displacing plough in soybean fields
Authors:Gao, Zhongchao (1); Liu, Feng (1); Zhang, Chunfeng (2); Hu, Fan (2); Kuang, Enjun (1); Cui, Xi'an (3); Ken, Araya (4); Kazuo, Nakamoto (5)
Author affiliation:(1) The Key Laboratory of Soil Environment and Plant Nutrition of Heilongjiang Province, Institute of Soil Fertilizer and Environment Resource, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China; (2) Jiamusi Branch of Heilongjiang Academy of Agricultural Sciences, Jiamusi 154007, China; (3) Heihe Sub-Academy of Heilongjiang Academy of Agriculture Sciences, Heihe 164300, China; (4) NICH Laboratory, Hokkaido Sapporo 079-01, Japan; (5) International Research Center of Agricultural Sciences, Tsukuba 305-8686, Japan
Corresponding author:Liu, F.(liufengjms@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:202-209
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore a new method to eliminate phytotoxicity of herbicide residue in soil, sugar beet was used as indictor plant to identify the residual herbicide which was measured by biological identification method. The residual herbicide was mainly distributed in soil layers of 0-10 cm and gradually reduced from 10 cm to 20 cm with the secure layer below 20 cm in a soybean field. The layer of 0-20 cm and 20-40 cm was switched by soil displacing plough of independent design, so called soil displacement. After soil displacement was carried out in a soybean field with herbicide residue by two years, the growth of sugar beet and potato became much better, while few weeds could survive in the fieldcompared to the control.compared to the control, the yield of sugar beet increased by 468.9% and 805.7%, and yield of potato increased respectively by 31.0% and 177.1% in the first year and the next year, respectively.compared to the control, the yield of maize and soybean were increased by 2.0% and 6.5% in the second year, respectively. At the same time, this plough was also applied in a soybean field with no soil pollution by herbicide residue.compared to the control, the yield of potato and sugar beet were decreased respectively by 3.1% and 5.6% in the first year, but the yield of corn and potato increased respectively by 5.2% and 27.0% in the next year. The research can give technological support to renovate the soil with herbicide residues, eliminate the barrier of crop rotation and promote plant structure.
Number of references:30
Main heading:Herbicides
Controlled terms:Agricultural machinery - Agriculture - Bioassay - Oilseeds - Soil pollution - Soil pollution control - Soils - Sugar beets - Weed control
Uncontrolled terms:Biological identification - Crop rotation - Crop yield - First year - Herbicide residues - Independent design - Plant structures - Residual herbicides - Soil displacement - Soil layer - Soybean fields - Technological supports
Classification code:483.1 Soils and Soil Mechanics - 801 Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2012.20.027
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692102
Title:Theoretical analysis andcomparison of performance on heat pump system for flue-cured tobacco based on isenthalpic and isothermal process
Authors:Lü, Jun (1); Wei, Juan (1); Zhang, Zhentao (1); Yang, Luwei (1); Li, Zhang (3); Li, Zhaomin (4)
Author affiliation:(1) Technical Institute of Physics and Chemistry of Chinese Academy of Sciences, Beijing 100190, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) Luoyang Tobacco Co., Luoyang 471002, China; (4) Songxian Tobacco Co., Luoyang 471400, China
Corresponding author:Yang, L.(lwyang2002@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:20
Issue date:October 15, 2012
Publication year:2012
Pages:265-271
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to investigate the effects of different drying processes on properties of heat pump system for curing tobacco, the application performance of a novel heat pump system for tobacco leaf flue-curing was analyzed andcompared based on isenthalpic and isothermal process. On the basis of given system design parameters and tobacco curing process, the maximum heat load in barn was 37.05 kW both during isenthalpic and isothermal processes when the quantity of fresh tobacco loaded was 3000 kg. The coefficient of performance (COP) during isothermal process was higher than that during isenthalpic process throughout the periods of curing tobacco. The average specific moisture extraction rate (SMER) throughout isothermal process was 0.13 kg/(kW&middoth) higher than that throughout isenthalpic process. Moreover it could be concluded that the curing cost with heat pump system in isothermal processes was reduced 0.06 Yuan per 1 kg dry tobacco leaves than that in isenthalpic process, totally saving 28.86 Yuan by 481 kg dry tobacco leaves. Therefore, the heat pump system for tobacco leaf flue-curing in isothermal process has better performance than those in isenthalpic process.
Number of references:24
Main heading:Curing
Controlled terms:Drying - Heat pump systems - Isotherms - Tobacco
Uncontrolled terms:Application performance - Coefficient of Performance - Curing process - Design parameters - Drying process - Flue-cured tobacco - Isenthalpic - Isothermal - Isothermal process - Specific moisture extraction rates - Tobacco leave
Classification code:641.2 Heat Transfer - 642.1 Process Heating - 801.4 Physical Chemistry - 815.1 Polymeric Materials - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2012.20.035
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692097
Title:Relationship between dust-retaining capabilities of photosynthetic organs and their surface properties of main shrubs species in Central Taklimakan Desert
Authors:Li, Shengyu (1); Gu, Feng (3); Lei, Jiaqiang (1); Xu, Xinwen (1); Li, Yinggang (4); Jin, Zhengzhong (1); Wang, Yongdong (1); Zheng, Wei (5)
Author affiliation:(1) Xinjiang Institute of Biology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; (2) Taklimkan Desert Research Station, Chinese Academy of Sciences, Korla 841000, China; (3) Tarim Oilfield Branch, Petro China Company Limited, Korla 841000, China; (4) Xinjiang Electric Power Designing Institute, Urumqi 830002, China; (5) Weather Station of Tazhong, Qiemo County 841000, China
Corresponding author:Li, S.(lishy_hb@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:223-229
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Photosynthetic organs stained with dusts on the whole plant of ten kinds of shrubs planted in Tazhong Botanical Garden, near the Tazhong Si Oilfield, in the hinterland of the Taklimakan Desert, were sampled. Their dust-retaining capabilities of photosynthetic organs were analyzed by mass subtraction method. The results showed that the order of photosynthetic organ dust-retaining capability of ten species of shrub evaluated by means of monomial index of dust-retaining capacity in per unit fresh mass photosynthetic organs was Tamarix androssowii Tamarix hohenakeri, Tamarix hispida, Tamarix ramosissma, Tamarix elongata, Tamarix austromongolica, Tamarix juniperina, Tamarix taklamakanensis, Haloxylon ammodendron, Calligonum caput-medusae. Dust-retaining capabilities of photosynthetic organs of 10 species of shrub were closely related to their surface properties.compared with Calligonum caput-medusae, Haloxylon ammodendro with assimilating branches, which has more shorter knot spacing and more leaves, exhibited higher dust-retaining capability of photosynthetic organs and Calligonum caput-medusae. Though leaves of Tamarix plants were also extremely degraded, they had excellent dust-retaining capability because of their photosynthetic organs, such as a mass of leaves, greater photosynthetic organs density, abundant tomenta, salt-secreting gland. Thus, their dust-retaining capabilities of photosynthetic organs were higher than that of Haloxylon ammodendron and Calligonum caput-medusae. Due to their surface properties, the dust-retaining capabilities of these Tamarix plants mentioned in this paper was different. The results provide a reference for tree species selection and allocation in landscaping and shelterbelt constructions, and research on correlation between plants and soils in arid regions. These results offered a scientific basis for.
Number of references:31
Main heading:Plants (botany)
Controlled terms:Arid regions - Dust control - Ecology - Landforms - Oil fields - Surface properties
Uncontrolled terms:Botanical gardens - Dust-retaining capability - Haloxylon ammodendron - Per unit - Photosynthetic organs - Plants - Subtraction method - Taklimakan desert - Tamarix androssowii - Tree species - Whole plants
Classification code:511 Oil Field Equipment and Production Operations - 481.1 Geology - 461.9 Biology - 951 Materials Science - 454.3 Ecology and Ecosystems - 444 Water Resources - 443 Meteorology - 451.2 Air Pollution Control
DOI:10.3969/j.issn.1002-6819.2012.20.030
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692088
Title:Ecological and environmental evaluation for water and soil losscomprehensive harness in Loess hilly region
Authors:Wang, Bing (1); Zhang, Guanghui (1); Liu, Guobin (2); Yang, Qinke (2); Yang, Yanfen (4)
Author affiliation:(1) School of Geography, Beijing Normal University, Beijing 100875, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (3) College of Urbun and Environmental Science, Northwest University, Xi'an 710127, China; (4) Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Corresponding author:Liu, G.(gbliu@ms.iswc.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:150-161
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Hierarchy,complexity and polytropy of eco-environment determine the difficulty in accessing its quality. It is a key issue that many scholars concern for a long time in establishing a set of index system and evaluation method, which is reasonable, scientific and representative in solving the same kind of problem. Methods of Grey relation degree,comprehensive evaluation and DPSIR-mDSS model (driving force, pressure, state, impact, response framework-multiple decision support system) were adopted tocompare their difference in accessing eco-environmental effects. Meanwhile, demonstration area of soil conservation and eco-environment construction in Yan'an was taken as a study object to access environmental effects of ecological restoration of water and soil losscomprehensive harness from 1999 to 2009. The results showed thatcomplicated relationship between human social and economic behavior and environmental system could be simplified to "one to one" causal chain by DPSIR model in constructing index system for accessing environmental effect of ecological restoration of water and soil losscomprehensive harness, accessing process could be decomposed and simplified. Also, the evaluation results of DPSIR-mDSS model was consistent with the actual situation of ecological restoration effects of study area, and would be better explained the variation of ecological restoration effects of water and soil losscomprehensive harness with time, which also provide a new method for ecological restoration effects assessment. In general, the eco-environmental status improved greatly due to the implement of "grain for green"project. However, more attention should be paid to problems in the future, such as pressure on cropland and ecological water storage deficit.
Number of references:39
Main heading:Geologic models
Controlled terms:Artificial intelligence - Control - Decision support systems - Ecology - Models - Restoration - Soil conservation - Soils
Uncontrolled terms:Causal chains - Comprehensive evaluation - Driving forces - Eco-environments - Ecological restoration - Environmental evaluation - Environmental systems - Evaluation results - Grey relation degree - Index systems - Loess hilly region - Quality assessment - Study areas - Water storage
Classification code:732 Control Devices - 731 Automatic Control Principles and Applications - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 902.1 Engineering Graphics - 483.1 Soils and Soil Mechanics - 454.3 Ecology and Ecosystems - 409 Civil Engineering, General - 402 Buildings and Towers - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2012.20.021
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692085
Title:Impact of intermittent infiltration on solute leaching efficiency in soil
Authors:Peng, Zhenyang (1); Wu, Jingwei (1); Huang, Jiesheng (1)
Author affiliation:(1) State Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
Corresponding author:Wu, J.(jingweifr@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:128-134
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In view of insufficient reveal on flow and solute transport regimes under intermittent infiltration conditions, movement laws of water and solute were conducted under same total infiltration volume but different frequencies. Experimental results showed that without evaporation, intermittent infiltration significantly raised the average infiltration rate as well as drainage rate, but had no effect on the total drainage volume. With limited irrigation frequencies, it raised the solute leaching rate without influencing the final leaching efficiency. If the infiltration frequency was too high, the water flow velocity would be too fast to carried solute downwards, resulting in a decrease of the leaching efficiency. The results of this study provide a reference for intermittent irrigation schedule design.
Number of references:24
Main heading:Infiltration
Controlled terms:Efficiency - Irrigation - Leaching - Soils - Solute transport
Uncontrolled terms:Different frequency - Drainage rate - Infiltration rate - Irrigation schedule - Leaching rates - Limited irrigations - On flow - Solute
Classification code:483.1 Soils and Soil Mechanics - 533.1 Ore Treatment - 821.3 Agricultural Methods - 913.1 Production Engineering
DOI:10.3969/j.issn.1002-6819.2012.20.018
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692076
Title:Realization and application evaluation of near-wall mesh in centrifugal pumps
Authors:Li, Xiaojun (1); Yuan, Shouqi (1); Pan, Zhongyong (1); Li, Yalin (1); Yang, Jun (1)
Author affiliation:(1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Yuan, S.(shouqiy@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:67-72
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To investigate effects of grid quality on the calculation accuracy for flow field simulation in centrifugal pumps, taking structured grid as research objects, the near-wall mesh of centrifugal pumps were constructed and evaluated in three aspects from the number of gird, subdivision of near-wall mesh and blocking strategies. Based on the grid independence analysis, the standard k-Ε model, RNG k-Ε model, standard k-ω model and SST k-ω model were used to simulate the flows in the centrifugal pump with n<inf>s</inf>=103 respectively.compared to the measured values, the prediction accuracy of numerical results obtained by coarse grid and fine grid were higher than the grid without near-wall mesh. The results showed that when near-wall mesh was added, the prediction accuracy of the pump head increased by 1.19%. The relationship between the near-wall mesh and the turbulence models were also analyzed to find a reliable and feasibility numerical method for the centrifugal pump. To accommodate the use of k-Ε model based scalable wall function, grid near-wall points were established at locations yielding dimensionless, grid wall spacing of Y <200 was appropriate, while Y &le100 was a must for the k-ω model with automatic wall function.
Number of references:26
Main heading:Quality control
Controlled terms:Centrifugal pumps - Models - Numerical analysis - Reliability analysis - Turbulence models
Uncontrolled terms:Calculation accuracy - Coarse grid - Fine grids - Flow field simulation - Grid quality - Investigate effects - Model-based OPC - Near-wall - Numerical results - Prediction accuracy - Pump head - Research object - Structured grid - Wall function - Wall spacing
Classification code:443.1 Atmospheric Properties - 618.2 Pumps - 902.1 Engineering Graphics - 913 Production Planning and Control; Manufacturing - 913.3 Quality Assurance and Control - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2012.20.009
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692086
Title:Splash detachment effects and its spatial distribution under corn canopies
Authors:Ma, Bo (1); Ma, Fan (1); Wu, Qiuju (1); Wu, Faqi (1)
Author affiliation:(1) College of Resources and Environment, Northwest Agricultural and Forest University, Yangling 712100, China; (2) Institute of Desertification Control, Ningxia Academy of Agriculture and Forestry Science, Yinchuan 750002, China
Corresponding author:Wu, F.(wufaqi@263.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:135-142
Language: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 systematically determine the splash detachment rate and spatial distribution characteristic at different growth stages of corn under different rainfall intensities, this study systematically investigated the throughfall and splash detachment rate at different growth stages of corn under different rainfall intensities, analyzed the relationship between splash detachment rate and LAI and throughfall intensity, and discussed the spatial distribution of splash detachment rate under corn canopies. The results showed that in the whole growing season, the average splash detachment rate under corn canopy was about 43 to 77% lower than that on bare soil. The splash detachment rate was not significantly related to LAI, but increased significantly with rainfall intensity. The splash detachment rates at different positions under canopy were considerably influence by the thoughfall intensities at the corresponding positions and increased with thoughfall intensity. The spatial distribution of splash detachment rate was well related to the distribution of throughfall, and the areas that had higher throughfall intensity also had extremely high splash detachment rate. The splash detachment characteristic proposed by this study would provide theoretical guidance for erosion control on slope lands.
Number of references:20
Main heading:Spatial distribution
Controlled terms:Erosion - Rain - Vegetation
Uncontrolled terms:Bare soils - Corn - Corn canopy - Distribution characteristics - Erosion control - Growing season - Growth stages - Rainfall intensity - Splash detachment - Throughfall
Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 443.3 Precipitation - 483 Soil Mechanics and Foundations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.20.019
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692101
Title:Transmission model of moisture transmembrane during fruit and vegetable drying process
Authors:Liu, Lingxia (1); Liu, Xiangdong (1); Chang, Jian (1); Qi, Tingting (2)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) State Intellectual Property Office of P. R. China, Beijing 100088, China
Corresponding author:Liu, X.(xdliu@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:20
Issue date:October 15, 2012
Publication year:2012
Pages:256-264
Language: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 describe the moisture transport process in the cellular tissues of fruits and vegetables during drying, the mass transfer processes of porous media drying and their related mathematical models were reviewed in this article. Based on the physiological structures and characteristics of fruit and vegetable tissues, a new concept for mass transfer of drying process was presented and the related parameters in the mathematical model were determined by means of microscopic images and convective drying experiments. The transmembrane transport model developed in this article estimated the water transfer process form the intracellular to the intercellular spaces effectively. The results showed that about 90% of the water present in the cells. Sequence of water migration in plant tissue during drying process was that water outflows from vacuoleto intercellular space (pores), which could be estimated by the water transmembrane flux(J<inf>V</inf>); and then water diffusion inside the pores of plant porous media could be calculated by the conventional pore network models.
Number of references:37
Main heading:Drying
Controlled terms:Cells - Fruits - Histology - Mass transfer - Mathematical models - Moisture - Physiological models - Porous materials - Tissue - Transmissions - Vegetables
Uncontrolled terms:Cellular tissue - Convective drying - Drying process - Fruit and vegetables - Intercellular spaces - Mass transfer process - Microscopic image - Moisture transport - Physiological structures - Plant tissues - Pore-network models - Transmembrane flux - Transmembrane transport - Transmembranes - Transmission model - Water diffusion - Water migration - Water transfers
Classification code:951 Materials Science - 921 Mathematics - 821.4 Agricultural Products - 801.4 Physical Chemistry - 642.1 Process Heating - 641.3 Mass Transfer - 602.2 Mechanical Transmissions - 461.2 Biological Materials and Tissue Engineering - 461.1 Biomedical Engineering
DOI:10.3969/j.issn.1002-6819.2012.20.034
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692091
Title:Saline soil identification based on electromagnetic induction and remote sensing in Xinjiang Oasis
Authors:Sun, Yongmeng (1); Ding, Jianli (1); Qu, Juan (1); Jiang, Hongnan (1)
Author affiliation:(1) Key Laboratory of Oasis Ecology Ministry of Education, College of Resource and Environment Science, Xinjiang University, Urumqi 830046, China
Corresponding author:Ding, J.(Ding_jl@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:180-186
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Taking into account the problem of soil salinization existing in arid region, this study was to discuss the feasibility of identifying saline soil using electromagnetic induction techniques and spectral angle mapper (SAM) in a typical arid region of Weigan-Kuqa River Oasis of Xin jiang Province. To severe saline soil, for example, using EM38 electromagnetic induction instrument and sampling data,combined with spectral angle mapper and regression analysis, get the spatial distribution of soil electrical conductivity (EC<inf>1:5</inf>) and identify severe saline soil. The result indicated that soil apparent electrical conductivity (EC<inf>a</inf>) has good non-linear correlation with Soil conductivity (EC<inf>1:5</inf>); the interpretation accuracy of the vertical mode conductivity (EM<inf>v</inf>) to soil electrical conductivity (EC<inf>1:5</inf>) is better than the horizontal mode conductivity to; soil salt content showed moderate variation; the electromagnetic induction techniques and spectral angle mapper can identify eligible saline soil better together. This research method can identify the saline soil better in typical arid areas, and provide a new way for salinization assessment in different scales.
Number of references:26
Main heading:Soils
Controlled terms:Arid regions - Electric conductivity - Electromagnetic induction - Moisture - Regression analysis - Remote sensing - Statistics
Uncontrolled terms:Apparent electrical conductivity - Arid area - Different scale - Electromagnetic induction technique - Identify - Non-linear correlations - research methods - Saline soil - Sampling data - Soil conductivity - Soil electrical conductivity - Soil salinization - Soil salt content - Spectral angle mappers - Vertical modes - Xinjiang
Classification code:922.2 Mathematical Statistics - 731.1 Control Systems - 701.1 Electricity: Basic Concepts and Phenomena - 483.1 Soils and Soil Mechanics - 444 Water Resources - 443.1 Atmospheric Properties - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2012.20.024
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692099
Title:Spatial autocorrelation analysis of multi-scale land use change at mountainous areas in Guizhou province
Authors:Liu, Min (1); Zhao, Cuiwei (1); Shi, Minghui (1)
Author affiliation:(1) College of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China; (2) Nanning Institute of Land and Resource Planning, Nanning 530022, China
Corresponding author:Zhao, C.(zhaocuiwei@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:239-246
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on remote sensing data of land use in 1986, 1995 and 2000 years on Huaxi district at Guiyang city in Guizhou province, spatial autocorrelation of land use changes at scales of 0.2 km×0.2 km, 0.4 km×0.4 km and 0.6 km×0.6 km were studied using GIS technology. Then, space lag model and classical linear regression model at three scales were established. The results showed that cultivate land, forest land, grassland, construction land and water area in Huaxi distrct at three scales in 1986, 1995, and 2000 years had strong positive spatial autocorrelation, the degree of spatial correlation had some connection with the scale, and spatial autocorrelation generally decreased when the study scale became larger.compared with the classical linear regression model at three scales, the residual of space lag model at three scales was smaller, and better in explain ability and forecast accuracy. The study provides a foundation for land use management for Karst region.
Number of references:29
Main heading:Autocorrelation
Controlled terms:Land use - Linear regression - Models - Remote sensing - Vegetation
Uncontrolled terms:Changes - Construction land - Forecast accuracy - Forest land - GIS technology - Guiyang City - Guizhou Province - Lag model - Land-use change - Land-use management - Linear regression models - Mountainous area - Multiscales - Remote sensing data - Scales - Spatial autocorrelations - Spatial correlations - Water areas
Classification code:922.2 Mathematical Statistics - 922 Statistical Methods - 921 Mathematics - 902.1 Engineering Graphics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 731.1 Control Systems - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2012.20.032
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692069
Title:Research progress of crop diseases and pests monitoring based on remote sensing
Authors:Zhang, Jingcheng (1); Yuan, Lin (1); Wang, Jihua (1); Luo, Juhua (1); Du, Shizhou (1); Huang, Wenjiang (1)
Author affiliation:(1) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China; (3) Center for Earth Observation and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China
Corresponding author:Huang, W.(huangwj@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:1-11
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For the monitoring of crop diseases and pests, traditional methods are stillcommonly used for data collection such as manual inspection and field sampling. However, these methods are not only time consuming, labor intensive, but also lack of generality and effectiveness, and tend to be subjective, which cannot satisfy the real-time monitoring of crop diseases and pests over vast area. Recently, the development of remote sensing provided an important mean for large area and rapidly obtaining crops and environmental information. This method showed a promising potential as an alternative method to traditional methods in disease monitoring, forecasting and yield loss assessment. Based on the description of physiological mechanism that crop diseases and pests stressed spectral response, some effective spectral wavelengths, and vegetation indices for crop diseases or pests monitoring were summarized and sorted. In addition, a number of algorithms used to identify diseases and pests identification, to monitor their severity, and to assess yield loss were also reviewed. Then, challenge problems of key technology on monitoring crop diseases and pests with remote sensing was also pointed out, and some possible solutions and tendencies how to realize large area monitoring the crops diseases and pests in future were also provided.
Number of references:62
Main heading:Crops
Controlled terms:Diseases - Monitoring - Pest control - Physiological models - Remote sensing - Vegetation
Uncontrolled terms:Alternative methods - Area monitoring - Crop disease - Data collection - Disease monitoring - Environmental information - Field sampling - Key technologies - Labor intensive - Manual inspection - Physiological mechanisms - Real time monitoring - Research progress - Spectral characteristics - Spectral response - Vegetation index - Yield loss
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 - 821.4 Agricultural Products - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 803 Chemical Agents and Basic Industrial Chemicals - 731.1 Control Systems - 461 Bioengineering and Biology
DOI:10.3969/j.issn.1002-6819.2012.20.001
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692079
Title:Parameter optimization and test of continuous spring brush scaling machine for freshwater fish
Authors:Cheng, Shijun (1); Zong, Li (1); Wan, Peng (1); Xiong, Shanbo (2)
Author affiliation:(1) College of Engineering, Huazhong Agricultural University, Wuhan 430070, China; (2) Sub Centre (Wuhan) of National Technol. and Res. and Development of Staple Freshwater Fish Proc., Wuhan 430070, China
Corresponding author:Zong, L.(zongli@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:20
Issue date:October 15, 2012
Publication year:2012
Pages:88-94
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To improve scaling effect of continuous spring brush scaling machine for freshwater fish, taking sliver carp were as test objects, the effects of scaling roller and operational factors on scaling rate were studied by using a homemade scaling machine. Then the optimalcombination of key factors was determined by the orthogonal test, the spring of which were 1.2 mm×16 mm, numbers of spiral-wound spring 2.5 laps, fixed distance of springs 40 mm, rotating speed of scaling roller 1390 r/min, rotating speed ofcompression roller 100 r/min and rotating speed of transport roller 800 r/min. On this optimalcombination the scaling rate mean of silver cap was 68.7%. This study could provide reference for the improvement of continuous spring brush scaling machine for freshwater fish.
Number of references:29
Main heading:Springs (components)
Controlled terms:Brushes - Optimization - Rollers (machine components) - Rotating machinery - Speed
Uncontrolled terms:Continuous - Freshwater fishes - Operational factors - Orthogonal test - Parameter optimization - Rotating speed - Scaling effects - Scaling machine - Scaling rates - Test object
Classification code:601.1 Mechanical Devices - 601.2 Machine Components - 605 Small Tools and Hardware - 921.5 Optimization Techniques - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2012.20.012
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692087
Title:Variations of sediment nutrient in check dam and its implication for small catchment sediment resources
Authors:Zhang, Fengbao (1); Xue, Kai (2); Yang, Mingyi (1); Shen, Zhenzhou (3)
Author affiliation:(1) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (3) Lab. of Soil and Water Loss Process and Control on the Loess Plateau of the Min. of Water Resources, Yellow River Institute of Hydraulic Research, Zhengzhou 450003, China; (4) Guangxi Transportation Research Institute, Nanning 530007, China
Corresponding author:Yang, M.(ymyzly@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:143-149
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The sedimentological and nutritional characteristics of eroded soil particles from the Loess Plateau in China were investigated in this paper. The large number of check dams built in the Loess Plateau function, partly as the depositors of eroded soils, carries important information about the environemntal processes relating to soil erosion and deposition. In this study, the organic matter (OM) contents, total nitrogen (N) contents, total phosphorus (P) contents, and total potassium (K) contents in both deposits of the dams and in soil of different parts of the catchments werecompared. The results showed that the variability of soil nutrients in the catchments was obviously larger than that in the dams; the variabilities of nutrients in the soils and in the gully walls were similar, where there was no significant difference between soil total N, total P, and total K in the gully walls and in sediments deposit profiles (p>0.05), but the soil nutrient contents were significantly lower than those on slope farmland and slope grassland (p<0.05). Those results implied that collapsing gully walls and expanding gullies were the main sources of sediments in check dams during the sediment trapping periods. The results also indicated that gravitational erosion and gully erosion were the two major erosion types in these small catchments. The variations of OM in the sediments and total N in the deposit profiles of the dams showed two different stages of development. It is concluded that sedimentological and nutritional differences result from the effects of the rural contract responsibility system on the land use and soil erosion.
Number of references:25
Main heading:Sediments
Controlled terms:Catchments - Dams - Deposits - Erosion - Hydroelectric power - Landforms - Nutrients - Potassium - Runoff - Sedimentology - Soils - Walls (structural partitions)
Uncontrolled terms:Check dam - Eroded soils - Gully erosion - Loess Plateau - Nutritional characteristics - Sediment resources - Sediment trapping - Small catchment - Soil erosion - Soil nutrients - Total nitrogen - Total phosphorus
Classification code:821.2 Agricultural Chemicals - 617 Turbines and Steam Turbines - 612 Engines - 611.1 Hydroelectric Power Plants - 549.1 Alkali Metals - 532 Metallurgical Furnaces - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 481.1 Geology - 444.1 Surface Water - 444 Water Resources - 441.1 Dams - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2012.20.020
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692089
Title:Chlorophyll content inversion with hyperspectral technology for wheat canopy based on support vector regression algorithm
Authors:Liang, Liang (1); Yang, Minhua (3); Zhang, Lianpeng (1); Lin, Hui (1); Zhou, Xingdong (1)
Author affiliation:(1) School of Geodesy and Geomatics, Jiangsu Normal University, Xuzhou 221116, China; (2) International Institute for Earth System Science, Nanjing University, Nanjing 210008, China; (3) School of Geosciences and Info.-Physics, Central South University, Changsha 4100831, China
Corresponding author:Liang, L.(liangliang198119@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:162-171
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to provide scientific basis for wheat growth monitoring and agronomic decision-making, the wheat canopy chlorophyll content was estimated by using hyperspectral technology in this paper. Eighteen kinds of hyperspectral indices werecomparative analyzed. The index REP, which could respond wheat canopy chlorophyll content sensitively, was selected. The inversion model of wheat canopy chlorophyll content was then built by using the field spectra as the training samples and the least squares support vector regression (LS-SVR) algorithm as the modeling method, with the calibration R-square and prediction R-square 0.751 and 0.722, respectively, indicating the accuracy of estimation predicted by REP was highest in all indices. Further more, the prediction accuracy of REP was least sensitive to the change of chlorophyll content and LAI values among 18 indices and therefore least affected by the range of sample values and canopy density when used to estimate the chlorophyll content of wheat canopy. Using the inversion model, the remote sensing mapping for OMIS image was accomplished. The inversion and measured values were thencompared by the method of regression fitting. The R-square and RMSE of the fitting model was 0.676 and 1.715, respectively, indicating the similarity between the inversion value and measured value was high. The result showed that it was feasible to estimate chlorophyll content accurately by using hyperspectral index REP to build a LS-SVR inversion mode. Therefore, this method proposed can be used as a rapid and non-destructive method for getting wheat chlorophyll content.
Number of references:48
Main heading:Chlorophyll
Controlled terms:Algorithms - Calibration - Estimation - Nondestructive examination - Regression analysis - Remote sensing - Spectrum analysis
Uncontrolled terms:Canopy density - Chlorophyll contents - Field spectra - Fitting model - Growth monitoring - HyperSpectral - Inversion - Inversion models - Inversion modes - Least squares support vector regression - Nondestructive methods - Prediction accuracy - R square - Regression fitting - Support vector regression (SVR) - Training sample - Wheat - Wheat canopy
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 - 922.2 Mathematical Statistics - 921 Mathematics - 804.1 Organic Compounds - 731.1 Control Systems - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2012.20.022
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692084
Title:Adaptability evaluation for reference evapotranspiration (ET<inf>0</inf>) formulas in Guanzhong Region of Shaanxi
Authors:Qiang, Xiaoman (1); Cai, Huanjie (3); Sun, Jingsheng (1); Wang, Feng (1); Shen, Xiaojun (1); Song, Ni (1)
Author affiliation:(1) Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China; (2) Key Laboratory for Crop Water Use and Regulation, Ministry of Agriculture, Xinxiang 453003, China; (3) Key Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Cai, H.(caihj@nwsuaf.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:121-127
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To investigate the adaptability of ET<inf>0</inf> in in Guanzhong Region of Shaanxi, four ET<inf>0</inf> equations including FAO-17 Modified Penman (FAO-MP), China scholar Modified Penman (PBX-MP), Penman-Monteith (PM) and Standard ASCE Penman-Monteith equation (ASCE-PM), were assessed. on the basis of measured data by weighting Lysimeters. The results showed that ASCE-PM was the best equation for estimating ET<inf>0</inf> in semi-humid area with a linear regression coefficient of 1.03 (R2=0.87) and mean absolute error (MAE) of 0.31 mm, compared to the measured values. The next was PM equation, followed by the PBX-MP and FAO-MP equations. The deviation between calculated and measured values was mainly caused by radiation and aerodynamic terms. Air temperature, sunshine and relative humidity had a significant effect on radiation term, while wind speed had a significant effect on aerodynamic term. The ASCE Penman-Monteith equation was proved tocompute the local ET<inf>0</inf> properly in Guanzhong region of Shaanxi province.
Number of references:22
Main heading:Aerodynamics
Controlled terms:Evapotranspiration - Heat radiation - Lysimeters - Soil surveys - Water supply
Uncontrolled terms:Adaptability evaluation - Air temperature - Asce penman-monteith equations - ET<inf>0</inf> - Linear regression coefficients - Mean absolute error - Penman-Monteith - Reference evapotranspiration - Wind speed
Classification code:406.2 Roads and Streets - 444.1 Surface Water - 446.1 Water Supply Systems - 631.1 Fluid Flow, General - 641.2 Heat Transfer - 651.1 Aerodynamics, General
DOI:10.3969/j.issn.1002-6819.2012.20.017
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692082
Title:Effects of small tube flow deficit irrigation on yield and quality of greenhouse grape under delayed cultivation
Authors:Zhang, Rui (1); Cheng, Ziyong (2); Li, Yi (1); Yang, Ali (3)
Author affiliation:(1) Forestry Academy, Gansu Agricultural University, Lanzhou 730070, China; (2) College of Engineering, Gansu Agricultural University, Lanzhou 730070, China; (3) Shaanxi Hengda Real Estate Assessment and Consulting Co. Ltd., Xianyang 712000, China
Corresponding author:Cheng, Z.(chengzy@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:20
Issue date:October 15, 2012
Publication year:2012
Pages:108-113
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Effects of deficit irrigation with small tube flow on water consumption, yield, water use efficiency, appearance quality and nutrition quality of delayed grapevine were tested in Zhangye Irrigation Experiment Station. The results showed that grapes' water consumption coefficient accounted more than 50% in fruit enlargement period, and grape yield reduced 32.53% under deficit irrigation in this phase. Insufficient water supply in the coloring and mature period could increase the total sugar content of grape and reduced titratable acid content, that was to say improved grapes'comprehensive nutritional quality. Fruit enlargement period plays an important role on grape quality formation. Under insufficient water supply condition in this period, the single fruit weight, anthocyanin content decreased, and grape sour degree aggravated. This research suggests that sensitivity of grapes' yield and quality with insufficient irrigation in different growth period are different, and it is important to study it for achieving water-saving and improving grapes' quality.
Number of references:24
Main heading:Fruits
Controlled terms:Anthocyanins - Greenhouses - Image quality - Irrigation - Pipe flow - Tubes (components) - Water conservation - Water management - Water supply
Uncontrolled terms:Anthocyanin content - Deficit irrigation - Fruit weight - Growth period - Nutrition quality - Nutritional qualities - Sugar content - Titratable acid - Water consumption - Water consumption coefficient - Water use efficiency - Water-saving - Yield
Classification code:804.1 Organic Compounds - 741 Light, Optics and Optical Devices - 619.1 Pipe, Piping and Pipelines - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 616.1 Heat Exchange Equipment and Components - 446 Waterworks - 444 Water Resources - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2012.20.015
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692078
Title:Fuzzy control of temperature and humidity of Oolong-tea automatic roaster based on cross-compensation decoupling
Authors:Lin, Rongchuan (1); Lin, Hetong (2); Lin, Qingjiao (3)
Author affiliation:(1) College of Mechanical Engineering, Jimei University, Xiamen 361021, China; (2) Institute of Postharvest Technology of Agricultural Products, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (3) Fujian Quanzhou Yunhe Tea Machinery Factory, Quanzhou 362400, China
Corresponding author:Lin, H.(hetonglin@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:80-87
Language: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 control of temperature and humidity of fen-flavor Oolong-tea roaster is always cross-coupling and severely lagging, so it is difficult to obtain the accurate precision of temperature and humidity due to its uncertain model parameters. In this study, the fuzzy reasoning synthesizing rule was adopted to propose an effective cross-decoupling means and obtain more accurate results for temperature and humidity control, which can better solve the cross-coupling and the lagging problem of the control object. MATLAB simulation results showed that this method exhibits fast response, high control precision and small overshoot. Besides, it is need to establish an accurate system model so it can achieve the precise temperature and humidity control of the tea baker. Practical operation indicated that the error of the temperature and humidity can be controlled within the desired precision range, and the temperature control error was not more than 1°C, while the relative humidity error was not more than 2.5%.
Number of references:33
Main heading:Humidity control
Controlled terms:Calcination - Chemical reactions - Couplings - Fuzzy control - Machinery - MATLAB - Temperature control - Uncertainty analysis
Uncontrolled terms:Cross-compensation decoupling - Cross-couplings - Fuzzy decoupling - Oolong-tea roaster - Temperature and humidity control
Classification code:922.1 Probability Theory - 921 Mathematics - 802.3 Chemical Operations - 802.2 Chemical Reactions - 731.3 Specific Variables Control - 731 Automatic Control Principles and Applications - 602 Mechanical Drives and Transmissions - 601 Mechanical Design - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2012.20.011
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692083
Title:Comparison of partitioning evapotranspirationcomposition in maize field using stable isotope and eddy covariance-microlysimeter methods
Authors:Shi, Junjie (1); Gong, Daozhi (2); Mei, Xurong (2); Ma, Xiaoyi (1); Hao, Weiping (2); Hu, Xiaotao (1)
Author affiliation:(1) Key Lab. of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Edu., Northwest Agriculture and Forestry University, Yangling 712100, China; (2) State Engineering Laboratory for Efficient Water Use and Disaster Loss Reduction of Crops, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Science, Beijing 100081, China; (3) State Key Laboratory of Hydro-Science and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China; (4) Shanghai Water Engineering Design and Research Institute, Shanghai 200065, China
Corresponding author:Gong, D.(gongdz@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:20
Issue date:October 15, 2012
Publication year:2012
Pages:114-120
Language: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 partition evapotranspiration into itscomponents, dynamics of water vapor δ18O at five different heights were monitored continuously in maize field by stable water vapor isotopes analysis systemcombined with Keeling plot curve, which werecompared with the estimations through the eddy covariance system and the micro-lysimeter. The results showed that the stable isotopecomposition of atmospheric water vapor (δ<inf>v</inf>) in maize field was significantly decreased after rainfalls, and linearly related to vapor pressure deficit (VPD) and solar radiation (R<inf>s</inf>) with correlation coefficients (R) of 0.65 and 0.51, respectively. Water vapor stable isotopecomposition (δ<inf>E</inf>) from soil evaporation has significant isotopic fractionation effects near the soil surface. Low soil water content and atmosphere relative humidity alleviated the isotope fractionation.compared with the results estimated by the EC-MLS method, the error estimated by IS method was less, about -0.02-0.08. The results indicated that thecombination of Keeling plot method with in situ continuous measurements of water vapor stable isotopecomposition accurately separated evapotranspiration in maize field. During the measurement period, i. e., after maize canopy moderately covered the soil, the average ratios of crop transpiration to evapotranspiration determined by IS and EC-MLS methods were 0.81and 0.78, respectively.
Number of references:29
Main heading:Isotopes
Controlled terms:Dynamic analysis - Evapotranspiration - Soil moisture - Soil surveys - Sun - Vapors - Water supply - Water vapor
Uncontrolled terms:Atmospheric water vapor - Continuous measurements - Correlation coefficient - Crop transpirations - Different heights - Eddy covariance - Eddy covariance systems - Isotopic fractionations - Keeling plots - Maize canopy - Microlysimeter - Soil evaporations - Soil surfaces - Soil water content - Stable isotopes - Vapor pressure deficit
Classification code:803 Chemical Agents and Basic Industrial Chemicals - 657.2 Extraterrestrial Physics and Stellar Phenomena - 641 Heat and Mass Transfer; Thermodynamics - 804 Chemical Products Generally - 483.1 Soils and Soil Mechanics - 444.1 Surface Water - 422.2 Strength of Building Materials : Test Methods - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2012.20.016
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692106
Title:Effect of cyclic moisture conditioning treatment on γ-aminobutyric acid content of germinated brown rice
Authors:Jia, Fuguo (1); Wang, Jitai (1); Lan, Haipeng (2); Han, Shan (1); Zhang, Qiang (1); Fu, Qian (1)
Author affiliation:(1) College of Engineering, Northeast Agriculture University, Harbin 150030, China; (2) College of Mechanical and Electronic Engineering, Tarim University, Alaer 843300, China
Corresponding author:Jia, F.(jfg204@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 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 increase content of γ-aminobutyric acid(GABA) in germinated brown rice, a new technique of germinated brown rice was presented, using repeated moisture conditioning treatment instead of soaking treatment. A centralcomposite rotatable orthogonal experimental design of response surface methodology was employed. Taking brown rice as raw material, the influences of three parameters of repeated moisture conditioning treatment on the content of GABA were investigated, and the three parameters were moisture adding amount, interval time and temperature. The content of GABA was attained with repeated moisture conditioning treatment and soaking treatment. Experimental results showed that the parameters of repeated moisture conditioning treatment had significant impact on the content of GABA (p<0.05). The sequence of influence from significant tocommon was once moisture adding amount, interval time and temperature. In the optimum condition where single moisture adding amount was 1.6%, interval time 67 min, and temperature 31°C, the content of GABA was 27.33 mg/100 g. The content of GABA was 2.09 fold of repeated moisture conditioning treatmentcompared with soaking treatment. This research can provide a theoretical basis for the new technology of germinated brown rice.
Number of references:23
Main heading:Moisture
Controlled terms:Amino acids - Extraction - Grain (agricultural product) - Models
Uncontrolled terms:Aminobutyric acids - Brown rice - Germinated brown rice - Interval time - Moisture conditioning - Optimum conditions - Orthogonal experimental design - Response surface methodology - Significant impacts - Soaking treatment - Theoretical basis - Three parameters
Classification code:461 Bioengineering and Biology - 801.4 Physical Chemistry - 802.3 Chemical Operations - 821.4 Agricultural Products - 902.1 Engineering Graphics
DOI:10.3969/j.issn.1002-6819.2012.20.039
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692103
Title:Quick detection of water content for pork by capacitance method
Authors:Zhang, Wenzhao (1); Liu, Zhizhuang (1); Zhou, Wenzhen (1)
Author affiliation:(1) Electronics Research Institute, Hunan University of Science and Engineering, Yongzhou 425100, China; (2) Key Laboratory of Key Technology on Agricultural Machine and Equipment, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Liu, Z.(liuzz168@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:272-275
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Determination of pork moisture content is of great significance to pork market management, storage and processing. To quickly detect pork moisture content, a uniplanar capacitance sensor probe with hardware circuit was designed using capacitance detection method in this study. The standard moisture samples were prepared by oven drying method. The calibration experimental results showed that the proposed method can determine pork moisture content quickly for moisture contents were in the range of 60%-76.4% with less than ±1.2% error. The temperature experiments showed that the pork dielectric constant was slightly affected by temperature. The effect of temperature can be neglected within the normal temperature.
Number of references:20
Main heading:Meats
Controlled terms:Capacitance - Capacitance measurement - Moisture determination - Water content
Uncontrolled terms:Capacitance method - Capacitance sensors - Detection methods - Effect of temperature - Hardware circuits - Oven drying method
Classification code:444 Water Resources - 701.1 Electricity: Basic Concepts and Phenomena - 822.3 Food Products - 942.2 Electric Variables Measurements - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2012.20.036
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692077
Title:CFD simulation and experiment of distribution characteristics for droplet of knapsack sprayer
Authors:Sun, Guoxiang (1); Li, Yongbo (1); Wang, Xiaochan (1); Ding, Weimin (1); Yu, Jin (3)
Author affiliation:(1) College of Engineering, Nanjing Agricultural University, Nanjing 210031, China; (2) Jiangsu Key Laboratory for Intelligent Agricultural Equipment, Nanjing 210031, China; (3) College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
Corresponding author:Wang, X.(wangxiaochan@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:73-79
Language: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 droplet distribution characteristics for the knapsack sprayer under different spray conditions, CFD technique (discrete phase particle tracking) was adopted to investigate the droplet distribution of deposition and particle size. In CFD simulations, vertical height from the spray nozzle were 0.4, 0.55 and 0.7 m, spray pressure were 0.15, 0.2, 0.3 and 0.35 MPa and wind speed were 0, 1, 2 and 3 m/s, and the same conditions had been set for knapsack sprayer. The results indicated that wind speed had significant effect on the deposition rate, and it decreased with the increasing of wind speed. The results also showed that wind speed had no significant effect on the pressure. The coefficients of determination and standard error for regression relationship between simulation and experimental results were 0.9424 and 0.039 respectively, which showed that the CFD technique (discrete phase particle tracking) can be used to evaluate deposition distribution, and it should not be used to evaluate particle size distribution because CFD simulation result had a bad correlation with experimental result. This research provides a theory reference for measuring data of sprayers.
Number of references:23
Main heading:Computational fluid dynamics
Controlled terms:Drops - Particle size - Particle size analysis - Pressure - Spraying - Wind effects
Uncontrolled terms:CFD simulations - CFD technique - Deposition distribution - Discrete phase - Distribution characteristics - Droplet distribution - Measuring data - Regression relationship - Spray conditions - Spray pressure - Standard errors - Wind speed
Classification code:443.1 Atmospheric Properties - 813.1 Coating Techniques - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2012.20.010
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692104
Title:Mechanical properties and features of fractured surface micrographs of bamboo particle reinforced unsaturated polyestercomposites
Authors:Huang, Shiguo (1); Qiu, Renhui (2)
Author affiliation:(1) College of Computer and Information, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (2) College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Corresponding author:Qiu, R.(renhuiqiu@fjau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:276-281
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Bamboo particles reinforced unsaturated polyester (UPE) composites were prepared bycompression molding and their mechanical properties were evaluated. The effect of bamboo particle size on the mechanical properties ofcomposites, and the quantitative relationship between the features of fractured surface micrographs ofcomposites and their mechanical properties were investigated. The interfacial adhesion of bamboo/UPE composites was characterized by scanning electronic microscope (SEM). The features of SEM graphs were quantitatively extracted by Fourier features of local binary pattern histograms. The results showed that the tensile strength, flexural strength and flexural modulus ofcomposites reinforced with 30-40 mesh bamboo particles increased by 32.9%, 34.4%, and 25.4% compared with that of 20-30 mesh bamboo particles, respectively. The tensile strength, flexural strength and flexural modulus of 100-120 mesh bamboo particlescomposites decreased by 10.6%, 20.8%, and 12.9% respectivelycompared with that of 30-40 mesh bamboo particles. While the tensile strength and flexural strength of 200 mesh bamboo particle reinforcedcomposites increased by 11.7% and 18.3% compared with that of 100-120 mesh, respectively. The visual features of SEM graphs fromcomposites fractured surface indicated that there were obvious differences among the SEM graphs ofcomposites with different bamboo particle sizes. Thecomposites with similar mechanical properties have similar texture features extracted from their SEM graphs. Our research proposes a novel approach for characterizing the relationship between the micro-morphology ofcomposites and their mechanical properties by extracting the micrograph features from the fractured surfaces ofcomposites.
Number of references:23
Main heading:Particle reinforced composites
Controlled terms:Bamboo - Bending strength - Esters - Fibers - Graphic methods - Mechanical properties - Particle size - Reinforcement - Surfaces - Tensile strength
Uncontrolled terms:Composites material - Features - Fractured surfaces - Partical size - Unsaturated polyester
Classification code:943.2 Mechanical Variables Measurements - 902.1 Engineering Graphics - 821.4 Agricultural Products - 951 Materials Science - 817 Plastics and Other Polymers: Products and Applications - 804.1 Organic Compounds - 421 Strength of Building Materials; Mechanical Properties - 812 Ceramics, Refractories and Glass
DOI:10.3969/j.issn.1002-6819.2012.20.037
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692081
Title:Water consumption of wine grape under different weather conditions in desert oasis
Authors:Zheng, Rui (1); Kang, Shaozhong (2); Tong, Ling (2); Li, Sien (2)
Author affiliation:(1) College of Water Resources and Architecture Engineering, Northwest Agricultural and Forest University, Yangling 712100, China; (2) Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China
Corresponding author:Kang, S.(kangshaozhong@tom.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:99-107
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Variation of vine-tree sap flow is critical for optimizing irrigation schedule and improving water use efficiency in the vineyard. A Dynamax sap flow measuring system was used to measure the vine-tree sap flow for a whole growing season in 2010 at Huangtai vineyard, Wuwei Experimental Station of Crop Water Use, Ministry of Agriculture in China. Results indicated that the vine-tree sap flow was mainly controlled by the leaf area index at initial growth stage, while by radiation, air temperature and humidity and soil moisture at the mid and later growth stage. But the response patterns of vine-tree sap flow to these environmental factors were notably different under different weather conditions. The agreement between sap flow and such meteorological factors, such as radiation, air temperature and humidity in the cloudy days was significantly higher than that in the clear days, while the agreement between sap flow and soil moisture in cloudy days was notably lower than that clear days. In addition, the sap flow was predominantly affected by radiation in clear days, while by air humidity in the cloudy days. This study revealed the mechanism of water consumption under different weather conditions in desert oasis.
Number of references:28
Main heading:Atmospheric movements
Controlled terms:Atmospheric temperature - Forestry - Fruits - Heat radiation - Meteorology - Soil moisture - Water conservation - Water supply
Uncontrolled terms:Air humidity - Air temperature - Cloudy days - Crop water use - Environmental factors - Experimental stations - Growing season - Growth stages - Irrigation schedule - Leaf area - Leaf Area Index - Measuring systems - Meteorological factors - Response patterns - Sap flow - Water consumption - Water use efficiency - Weather conditions
Classification code:821.0 Woodlands and Forestry - 641.2 Heat Transfer - 483.1 Soils and Soil Mechanics - 821.4 Agricultural Products - 446.1 Water Supply Systems - 443.1 Atmospheric Properties - 443 Meteorology - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.20.014
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692098
Title:Land use spatial structure optimization based on LUPO model in Deqing county
Authors:Wang, Shizhong (1)
Author affiliation:(1) College of Business Administration, Zhejiang University of Finance and Economy, Hangzhou 310018, China
Corresponding author:Wang, S.(wangshizhong@zufe.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:230-238
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With the population growth, the rapid economic development and quick expansion of cities, the intensity of land-use is increasing, and the problem of land fragmentation has grown more and more serious. On the condition that the demand of economic and social development was satisfied, a model of land use spatial structure optimization was constructed based on GIS, genetic algorithm, multi-objective decision and landscape ecology theory, which could reduce the degree of landscape fragmentation, protect the habitat of living things, and improve the efficiency and benefit of land use. The scale issues, conversion rules and algorithm flow of the model were also studied particularly in this paper. On the basis of LUPOlib1.0 software package provided by Annelie Holzkamper, etc., the secondary development of the procedure by using C/C language was carried out. Taking Deqing County as an example, its land use spatial structure optimization was studied bycomputer emulation on dynamic process. By using the optimization model, although the industrial and urban land concentration was decreased, the agglomeration degree of farmland, garden, forest and rural residential land was improved, and as a whole, the degree of land fragmentation was reduced. The results indicated that this model can be used to optimize land use spatial structure and reduce land fragmentation.
Number of references:28
Main heading:Shape optimization
Controlled terms:Economics - Genetic algorithms - Geographic information systems - Land use - Mathematical models - Population statistics - Structural optimization
Uncontrolled terms:Degree of land fragmentation - Deqing county - Economic development - Efficiency and benefit - Landscape ecology - Landscape fragmentation - Living things - Multiobjective decision - ON dynamics - Optimization models - Population growth - Secondary development - Social development - Spatial - Spatial structure - Structure optimization
Classification code:403 Urban and Regional Planning and Development - 723.3 Database Systems - 921 Mathematics - 921.5 Optimization Techniques - 922.2 Mathematical Statistics - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2012.20.031
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692080
Title:Analysis and test for orientation mechanism in fruit transportation
Authors:Wang, Chunyao (1); Liang, Qinan (2); Min, Lei (1); Liu, Xiangdong (2); Wang, Yuedong (1)
Author affiliation:(1) School of Mechanical Engineering, Xinjiang University, Urumqi 830047, China; (2) Institute of Agricultural Mechanization, Xinjiang Academy of Agricultural, Urumqi 830091, China
Corresponding author:Wang, C.(wangchun_yao@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:95-98
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:The oritation technology of fruits is extensively applied in mechanical sizing and detecting of fruits. This paper theoretically analyzed dynamic mechanism of monosymmetrical fruits in transportation based on rigid body dynamics. The kinetic equation of monosymmetrical fruits in transportation was established and analyzed using the stability of Lyapunov V-function. The result showed that fruit was stable at the origin. Through dynamic simulation for oritation process using ADAMS, it was found that the rotation of ellipsoid around the maximum moment of inertia axis was stable. In addition, the oritation experiment for apricots in Xinjiang was conducted by special test device. It was obtained that the orientation success rate was higher when the ratio of the moment inertia of major diameter and riding diameter of apricots was larger, with the oritation success rate up to 88%.
Number of references:28
Main heading:Fruits
Controlled terms:Computer simulation - Convergence of numerical methods - Crystal orientation - Dynamic analysis - Integral equations - Transportation
Uncontrolled terms:Dynamic mechanism - Kinetic equations - Maximum moments - Orientation mechanism - Rigidbody dynamics - Test device - Xinjiang
Classification code:921.6 Numerical Methods - 921.2 Calculus - 821.4 Agricultural Products - 723.5 Computer Applications - 933.1.1 Crystal Lattice - 434 Waterway Transportation - 432 Highway Transportation - 431 Air Transportation - 422.2 Strength of Building Materials : Test Methods - 433 Railroad Transportation
DOI:10.3969/j.issn.1002-6819.2012.20.013
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692092
Title:Inversion for spatial distribution of soil organic matter content based on multivariate geostatistics
Authors:Chen, Fengrui (1); Qin, Fen (1); Li, Xi (3); Peng, Guangxiong (4)
Author affiliation:(1) Key Laboratory of Geospatial Technology for Middle and Lower Yellow River Regions, Ministry of Edu., Henan University, Kaifeng 475004, China; (2) College of Environment and Planning, Henan University, Kaifeng 475004, China; (3) State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China; (4) School of Geosciences and Info.-Physics, Central South University, Changsha 410083, China
Corresponding author:Chen, F.(fruich@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:187-194
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The classical statistical method is always used to construct quantitative remote sensing retrieval model. However, the method doesn't take into account the spatial relations between data, which will severely affect the retrieval accuracy. In order to improve the spatial predictive accuracy of soil organic matter, a multivariate geospatial method for making retrieval model was presented in this paper. Considering the spatial distribution characteristic of regression error, a multivariate geostatistical method called ordinary Kriging with varying local means (OKLM) was presented, which was used to construct remote sensing retrieval model. The method was illustrated using soil organic matter (SOM) content in Southwest Sichuan province, and wascompared with other method, such as ordinary Kriging, ordinary remote sensing retrieval method, and remote sensing retrieval model based on regression Kriging. The results showedthe proposed method improved the predictive accuracy effectively among these methods, because the proposed method was based on relations between SOM sampling data and TM images using spatial statistics, taking fully into account the spatial relations among the data, and obtained more accurate retrieval model.compared with regression Kriging, OKLM assumed that the means of regression errors cannot always be zero in local neighborhood, which was more in line with the actual situation. The proposed method provides a scientific basis for the farmland nutrient management and sustainable development of the regional agricultural.
Number of references:29
Main heading:Biological materials
Controlled terms:Biogeochemistry - Interpolation - Organic compounds - Regression analysis - Remote sensing - Sampling - Soils - Spatial distribution
Uncontrolled terms:Distribution characteristics - Geo-spatial - Geo-statistics - Geostatistical method - Local mean - Multivariate geostatistics - Nutrient management - Ordinary kriging - Predictive accuracy - Quantitative remote sensing - Regression errors - Regression-kriging - Retrieval - Retrieval accuracy - Retrieval methods - Retrieval models - Sampling data - Sichuan province - Soil organic matter contents - Soil organic matters - Spatial relations - Spatial statistics - TM image
Classification code:922.2 Mathematical Statistics - 921.6 Numerical Methods - 921 Mathematics - 804.1 Organic Compounds - 801.2 Biochemistry - 801 Chemistry - 731.1 Control Systems - 483.1 Soils and Soil Mechanics - 461.2 Biological Materials and Tissue Engineering
DOI:10.3969/j.issn.1002-6819.2012.20.025
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715693432
Title:Robust optimal design of multi-objective control model of working speed forcombine harvester
Authors:Wang, Xin (1); Fu, Han (1); Wang, Shumao (1); Cui, Zhiying (2); Cheng, Lixia (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) China Northern Machinery Co. Ltd., Changchun 130507, China
Corresponding author:Wang, X.(wangxin820117@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:27-33
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, the working speed control strategy of combine harvester was studied. Taking harvest loss, harvest efficiency and energy cost as multiply control targets, the multiple targets working speed control model was built based on robust optimization theory. Considering the analysis of the constraint conditions, expected space of control targets and the consideration of sensitivity of control target to the parameter variation, annealing algorithm was proposed to calculate the weighting factor of the control targets and applied to the control parameter of harvest speed. Field testing showed the multiple targets control model can make the grain loss in the range from 0.42%-0.43% and threshing power consumption can be controlled from 15.12 to 17.32 kW when the deviation rate of straw-grain ratio and grain density were 40% and 29.9%. It showed that with this control model rational control of harvest speed can be achieved even under the harsh working condition, and verified the robustness and validity of the control model.
Number of references:30
Main heading:Robustness (control systems)
Controlled terms:Control system analysis - Factor analysis - Harvesters - Harvesting - Sensitivity analysis - Site selection - Speed control
Uncontrolled terms:Annealing algorithm - Combine harvesters - Constraint conditions - Control model - Control parameters - Control strategies - Control target - Energy cost - Field testing - Grain density - Grain loss - Multi-objective control - Multiple targets - Multiple-objective optimization - Robust Optimal Design - Robust optimization theory - Simulated annealing algorithms - Weighting factors - Working speed
Classification code:922.2 Mathematical Statistics - 821.3 Agricultural Methods - 821.1 Agricultural Machinery and Equipment - 731.3 Specific Variables Control - 731.1 Control Systems - 403 Urban and Regional Planning and Development - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2012.20.004
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692073
Title:Statics analysis and optimal design of 3-DOF parallel mechanical leg
Authors:Rong, Yu (1); Jin, Zhenlin (1); Qu, Mengke (2)
Author affiliation:(1) College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China; (2) College of Mechanical and Electronic Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China
Corresponding author:Rong, Y.(lixiangcg@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:41-49
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to optimal design for the statics of the six-legged robot's parallel mechanical leg, a statics optimal design method based on the mapping of both constraint and actuation forces was proposed. Firstly, the mapping of both constraint and actuation was analyzed, and the constraint and actuation Jacobian matrix was established. Then, based on the actuation Jacobian matrix, the actuation statics transmission equation was established, the performance evaluation index of actuation statics was designed, and the relationship between the performance evaluation index and structure parameters was analyzed. Through the same way, the constraint the statics analysis was conducted. Finally, based on the performance evaluation index both of constraint and actuation statics, the structure parameters were optimal designed by Monte Carlo method. Calculations showed that when the parameter of the fixed platform was 200 mm, the parameter of the connecting rod was 70 mm, the parameter of the motion platform was 50 mm, the minimum rod length of branch No.1 and 3 was 530 mm, the minimum rod length of branch 2 was 330 mm, the maximum rod length of branch No.1 and 3 was 900 mm, the maximum rod length of branch No.2 was 600 mm, the statics performance of the mechanical leg was the best. The studies laid the theoretical foundation for further study of the six-legged robot.
Number of references:26
Main heading:Optimal systems
Controlled terms:Jacobian matrices - Monte Carlo methods - Optimization - Robots
Uncontrolled terms:Actuation force - Motion platforms - Optimal design - Optimal design methods - Parallel mechanical leg - Performance evaluation index - Six-legged robots - Statics analysis - Structure parameter - Theoretical foundations - Transmission equation
Classification code:731.5 Robotics - 921.1 Algebra - 921.5 Optimization Techniques - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2012.20.006
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692100
Title:Driving force analysis of land use change based on Logistic regression model in mining area
Authors:Xu, Jiaxing (1); Li, Gang (1); Chen, Guoliang (1)
Author affiliation:(1) Lab. for Land Environ. and Disaster Monitoring of Natl. Admin. of Surv. Mapping and Geoinformation, China University of Mining and Technology, Xuzhou 221116, China; (2) School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221008, China
Corresponding author:Xu, J.(xujx2002@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:247-255
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:In order to investigate the evolution and driving mechanism of land use in mining area, land use change of Jiawang mining area in Xuzhou was analyzed based on the TM/ETM images in 1990, 2000 and 2008, using remote sensing, GIS and software SPSS. With the Logistic regression model, the driving factors of land use change were analyzed from economic, social and spatial distance factors. The results showed that the characteristics of land use change in the study area were that the cultivated land and forest land continuously decreased, constructive land and water body rapidly increased, and grassland slightly increased, which were in an unbalanced state overall. The analysis results of logistic regression model for cultivated land and forest land change indicated that the change of cultivated land in first period (1990-2000) was dominated by the factors of "distance to the nearest mining area"and "distance to the nearest rural settlement", and priority factors in the second period (2000-2008) were "distance to the nearest rural settlement", "farmer's population density", and "distance to the nearest road". Decrease of forest land was affected by "elevation"and "distance to the nearest mining area"from 2000 to 2008. These results provide an important guide for ecological and environmental conservation, optimal allocation and sustainable utilization of land resources in mining areas.
Number of references:32
Main heading:Regression analysis
Controlled terms:Coal mines - Conservation - Factor analysis - Forestry - Geographic information systems - Land use - Logistics - Population statistics - Remote sensing
Uncontrolled terms:Cultivated lands - Driving factors - Driving force analysis - Driving forces - Driving mechanism - Environmental conservation - Forest land - Land resources - Land-use change - Logistic regression models - Mining areas - Optimal allocation - Population densities - Rural settlement - Spatial distance - Study areas - Sustainable utilization - Waterbodies
Classification code:922.2 Mathematical Statistics - 913 Production Planning and Control; Manufacturing - 912 Industrial Engineering and Management - 821.0 Woodlands and Forestry - 731.1 Control Systems - 723.3 Database Systems - 503.1 Coal Mines - 454 Environmental Engineering - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2012.20.033
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692095
Title:Experimental study on shallow soil assisted heat release-storage system with water-water heat pump in solar greenhouse
Authors:Fang, Hui (1); Yang, Qichang (1); Zhang, Yi (1)
Author affiliation:(1) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (2) Lab. of Energy Conservation and Waster Treatment of Agricultural Structures, Ministry of Agriculture, Beijing 100081, China
Corresponding author:Yang, Q.(yangq@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:20
Issue date:October 15, 2012
Publication year:2012
Pages:210-216
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:During cold winter night, the air temperatures inside solar greenhouses are low for crop growth, especially during the latter half of the night, due to the limited heat storage capacity of the greenhouses. Thus, in the present experiment, a solar and shallow soil assisted heat release-storage system with water-water heat pump was designed. During the daytime, the solar energy obtained from the greenhouse back wall was absorbed and released to the shallow soil using circulated water with a water pump. Before midnight, the heat energy stored in the soil automatically was released to the air inside the greenhouse duo to the temperature differences between the soil and air. When air temperature inside the greenhouse was lower than its set-point, the heat pump was used to exact the heat energy from the soil for heating the greenhouse air. The results showed that the coefficient of performance of the system was more than 3 even on a cloudy day and about 42% energy had been savedcompared with conventional coal-fired hot water heating system. After covering the insulation layer, the average air and soil temperature was 3.2 and 3.3°C higher inside the experimental greenhouse than that in the control greenhouse respectively due to the higher heat storage. After turning on the heat pump, the average air and soil temperature inside the experimental greenhouse was 5.7 and 2.9°C higher than that in the control greenhouse, respectively.
Number of references:30
Main heading:Greenhouses
Controlled terms:Atmospheric temperature - Heat pump systems - Heat storage - Soils - Solar heating
Uncontrolled terms:Air temperature - Coefficient of Performance - Cold winter - Crop growth - Experimental studies - Greenhouse air - Heat energy - Heat pumps - Heat release - Heat storage capacity - Hot-water heating systems - Insulation layers - Shallow soils - Soil temperature - Solar greenhouse - Temperature differences - Water pump - Water-water
Classification code:402.1 Industrial and Agricultural Buildings - 443.1 Atmospheric Properties - 483.1 Soils and Soil Mechanics - 641.2 Heat Transfer - 643.1 Space Heating
DOI:10.3969/j.issn.1002-6819.2012.20.028
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692074
Title:Vibration isolation performance and fuzzy PID control method of magneto-rheological fluid engine mount
Authors:Shi, Wenku (1); Hou, Suojun (1); Wang, Xuejing (1); Wang, Shaohua (1); Li, Haisheng (2)
Author affiliation:(1) State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China; (2) Shanghai Luoshi Vibration Control Co. Ltd., Shanghai 201814, China
Corresponding author:Shi, W.(Shiwk@jlu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:50-57
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 improve the low frequency characteristic of engine mount, a MRF (Magneto-rheological Fluid) engine mount was designed in the paper based on the rheological property of MRF. The expression of liquid resistance in the flow mode was derived. Bond graph model of MRF engine mount was built to deduce the expression of the dynamic stiffness and loss angle. Then the dynamic characteristics at low frequency were simulated in MATLAB. Thecomparison of the simulation and experimental results proved that the model was accurate. Considering equivalent stiffness and damping, the two-degrees-of freedom model of engine-frame system was built and simulation model was built in MATLAB/Simulink. Then the isolation performance of the MRF engine mount was simulated by Fuzzy-PID control method under different working conditions. The simulation results proved that MRF engine mountcombined with fuzzy PID control method was effective to reduce the body acceleration and the force transferred to the frame. This research provides a reference for further research and development of MRF mount.
Number of references:30
Main heading:Structural frames
Controlled terms:Computer simulation - Engines - Fuzzy control - Graph theory - Magnetorheological fluids - MATLAB - Stiffness - Three term control systems - Vibration control
Uncontrolled terms:Body acceleration - Bond graph - Bond graph model - Dynamic characteristics - Dynamic stiffness - Engine mount - Equivalent stiffness - Flow modes - Frequency characteristic - Fuzzy PID-control - Isolation performance - Liquid resistance - Loss angle - Magneto-rheological fluid - Research and development - Rheological property - Simulation model - Vibration isolations
Classification code:921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921 Mathematics - 731 Automatic Control Principles and Applications - 723.5 Computer Applications - 951 Materials Science - 708.4 Magnetic Materials - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 408.2 Structural Members and Shapes - 612 Engines
DOI:10.3969/j.issn.1002-6819.2012.20.007
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692093
Title:Quantitative evaluation method and universal tool for crop ecological suitability
Authors:Lu, Zhou (1); Qin, Xiangyang (1); Li, Qifeng (1); Yu, Ying (1); Zang, Chenlong (2); Huai, Heju (1)
Author affiliation:(1) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) College of Information Science and Engineering, Shandong Agricultural University, Taian 100097, China
Corresponding author:Qin, X.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:195-201
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This article attempts to establish a framework of quantitative evaluation method and implement a universal tool (software) for evaluating crop ecological suitability based on the framework. Three improvements were made in quantitative evaluation method: 1) ecological distance calculated with four basic points is used to weigh the fitness of environmental factors, which can represent the thresholds of vital factors andcommon factors with different basic points; 2) double-threshold-setting method is used in result grading, which can separate thecomponents with obscure ecological meanings from those with obvious ecological meanings; 3) a digital and structured expression of suitability evaluation process is presented. With the improved method, we have developed a universal evaluation tool implementing a quantitative evaluation, which can help agriculture experts without IT engineering knowledge. As an application, we implement a quantitative evaluation of ecological suitability of winter wheat in Beijing area. The experiment shows that the tool can accommodate most kinds of environmental factors as well as evaluation algorithms.
Number of references:31
Main heading:Ecology
Controlled terms:Crops - Tools
Uncontrolled terms:Beijing area - Double-threshold-setting - Ecological distance - Ecological suitability - Engineering knowledge - Environment - Environmental factors - Evaluation algorithm - Evaluation tool - Quantitative evaluation - Quantitative evaluation methods - Suitability evaluation - Winter wheat
Classification code:454.3 Ecology and Ecosystems - 603 Machine Tools - 605 Small Tools and Hardware - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2012.20.026
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692090
Title:Assessing freeze injury to winter wheat with multi-temporal HJ-1 satellite imagery
Authors:Dong, Yansheng (1); Chen, Hongping (2); Wang, Huifang (1); Gu, Xiaohe (1); Wang, Jihua (1)
Author affiliation:(1) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; (3) Institute of Agricultural Remote Sensing and Information System Application, Zhejiang University, Hangzhou 310029, China
Corresponding author:Gu, X.(guxh@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:172-179
Language: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 spatial distribution and severity level of freeze injury on winter wheat is of great importance to timely agriculture recovery. In this paper, taking central and southern Hebei province as study area, a rapid algorithm for assessing freeze injury on winter wheat was developed. Firstly, Enhanced Vegetation Index (EVI) was selected as the optimal vegetation index after sensitivity analysis of vegetation index to freeze injury. Secondly, a freeze injury assessing algorithm was developed based on multi-temporal HJ-1 satellite imagery without ground data. Thirdly, this algorithm was validated through ground survey points. It is shown that the relative change of pre- and post-frozen EVI is linearly related to the damage severity. The new approach is proved to be able to assess winter wheat injury spatial distribution and severity level rapidly and successfully.
Number of references:23
Main heading:Crops
Controlled terms:Algorithms - Grain (agricultural product) - Remote sensing - Satellite imagery - Spatial distribution - Vegetation
Uncontrolled terms:Enhanced vegetation index - Freeze-injury - Ground data - Ground surveys - Hebei Province - HJ-1 - Multi-temporal - Study areas - Vegetation index - Winter wheat
Classification code:443 Meteorology - 723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.20.023
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692105
Title:Gel properties of shrimp surimi induced by dense phase carbon dioxide
Authors:Qu, Xiaojuan (1); Liu, Shucheng (1); Ji, Hongwu (1); Zhang, Liang (1); Huang, Wanyou (1); Mao, Weijie (1); Xie, Wancui (1)
Author affiliation:(1) Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Guangdong Ocean University, Zhanjiang 524088, China; (2) College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
Corresponding author:Liu, S.(Lsc771017@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:282-287
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the feasibility of preparing protein gel induced by dense phase carbon dioxide (DPCD), the effects of treatment pressure (5-30 MPa), exposure time (10-50 min) and temperature (50-70°C) on gel properties and proximatecomposition of shrimp surimi from Litopenaeus vannamei were studied. The results showed that DPCD could induce shrimp surimi to form protein gel. The pressure, exposure time and temperature had significant effect on gel properties. Gel properties of shrimp surimi induced by DPCD were better under conditions of 20 or 25 MPa, 60°C, 30 min.compared with the gel induced by heat, the gel induced by DPCD had higher gel strength and water holding capacity, and retained more nutrientcomponents. These results indicated that DPCD could induce gel forming and improve gel properties, which could be a substitute technique for heat inducement in protein gel products processing.
Number of references:31
Main heading:Shellfish
Controlled terms:Carbon dioxide - Gels - Proteins - Separation
Uncontrolled terms:Dense phase carbon dioxide - Exposure-time - Gel properties - Gel strengths - Litopenaeus - Protein gel - Shrimp surimi - Water holding capacity
Classification code:461.9 Biology - 802.3 Chemical Operations - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2012.20.038
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692070
Title:Design and experiment of precision rice hill-drop drilling machine for dry land with synchronous fertilizing
Authors:Zeng, Shan (1); Tang, Haitao (3); Luo, Xiwen (1); Ma, Guohui (3); Wang, Zaiman (1); Zang, Ying (1); Zhang, Minghua (1)
Author affiliation:(1) College of Engineering, South China Agriculture University, Guangzhou 510642, China; (2) Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agriculture University, Guangzhou 510642, China; (3) Hunan Hybrid Rice Research Center, Changsha 410125, China; (4) Institute of Soil and Fertilizer Research, Hunan Academy of Agricultural Science, Changsha 410125, 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:20
Issue date:October 15, 2012
Publication year:2012
Pages:12-19
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to the agronomic requirements of rice direct seeding technique with synchronous fertilizing, a precision rice hill-drop drilling machine for dry land with opening furrows, forming ridges, applying fertilizer, covering and seeding synchronously was developed. A fertilizing device was added to the 2BDH-8 type rice hill-drop drilling machine developed in South China Agricultural University. The power transmission system, fertilizing system and furrow opener were designed. The seeding and fertilizing system was both powered by the tractor engine to ensure the synchronization of seeding and fertilizing. An acute angle furrow opener was designed to open furrows with 50 mm wide, 50-70 mm deep and 100-120 mm away from seeding furrows. Fertilizers were applied into the bottom of the furrows through an external slot wheeled feeder and then covered with soil. Experimental results showed that the synchronous deep fertilizing could increase the production efficiency significantly than the manual fertilizing. With the same fertilizing level,compared with artificial fertilization seeding, synchronous fertilizing improved the rice tillering by an average of 6.9 spikes per individual plant with an increase of 25.2%, increased the average SPAD value by 8.9 with 29.8%, improved nitrogen use efficiency by 13.78% with 22.3%, improved partial productivity of nitrogen by 20.54 kg/kg&middotN with an increase of 46.3%, and increased rice yield by 1411.5 kg/hm2 with an improvement of 29.5%. The results showed that this machine cancomplete opening furrows, forming ridges, applying fertilizer, covering and seeding synchronously, and the yield increased significantly than the manual fertilizing. The experimental results can provide a theoretical basis of nitrogen saving cultivation for guiding the rice hill-drop drilling machine in dry land with deep fertilization.
Number of references:29
Main heading:Seed
Controlled terms:Agricultural machinery - Cultivation - Design - Drilling equipment - Drilling machines (machine tools) - Drops - Fertilizers - Nitrogen
Uncontrolled terms:Direct-seeding - Dry land - Fertilization - Furrow openers - Nitrogen-use efficiency - Opening furrows - Power transmission systems - Production efficiency - Rice - Rice yield - South China - Theoretical basis
Classification code:408 Structural Design - 443.1 Atmospheric Properties - 603.1 Machine Tools, General - 604.2 Machining Operations - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2012.20.002
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692096
Title:Dynamic measurement method of gas flow rate at low pressure and wide temperature
Authors:Li, Jinyang (1); Meng, Xiaofeng (1); Dong, Dengfeng (1)
Author affiliation:(1) Science and Technology on Inertial Laboratory, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
Corresponding author:Li, J.(by0817136@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:217-222
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The effective and convenient method to measure mass flow rate is absent now when absolute gas pressure less than 40 kPa and gas temperature from negative 70 to positive 80°C. For this case, a flow rate measurement method based on dynamic equilibrium principle was proposed and a novel flow metering device was designed. In low pressure and wide temperature, the flow rate through a control valve is determined by four factors: upstream pressure of valve, downstream pressure of valve, temperature and valve opening. With the data samples obtained from the metering system, the expression of the relationship between the flow rate and the four factors was established based on BP neural network method. The experimental results indicated the relative error of flow rate calculation was less than 1.8% and the proposed flow rate measurement method was effective.
Number of references:27
Main heading:Flow rate
Controlled terms:Flow of gases - Measurements - Neural networks - Safety valves
Uncontrolled terms:BP neural networks - Control valves - Data sample - Downstream pressure - Dynamic equilibria - Dynamic measurement methods - Flow metering - Flow rate measurements - Gas pressures - Gas temperature - Low pressures - Mass flow rate - Metering systems - ON dynamics - Relative errors - Upstream pressure - Valve opening
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 - 914.1 Accidents and Accident Prevention - 631.1.2 Gas Dynamics - 631 Fluid Flow - 723.4 Artificial Intelligence
DOI:10.3969/j.issn.1002-6819.2012.20.029
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692075
Title:Pyrological characteristics of burner-type diesel particulate filter for regeneration
Authors:Fu, Jun (1); Gong, Jinke (2); Yuan, Wenhua (1); Zeng, Zhouliang (1); Yang, Jianhua (1)
Author affiliation:(1) Department of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422004, China; (2) State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China
Corresponding author:Fu, J.(huabeifujun@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:58-66
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to obtain the pyrological characteristics of a burner-type diesel particulate filter (DPF), the mathematical model of pyrogenation regeneration process for burner-type wall-flow honeycomb ceramic filter was established, considering the subordinate oxidation reaction model. By solving the multi-fields coupling of flow velocity, pressure, temperature and particulate concentration, the variation laws of pyrological parameters were studied during burner-type diesel particulate filter (DPF) regeneration. The results showed that the pyrological parameters of burner-type system and exhaust characteristics had a great impact on the regeneration. With the air-fuel matching ratio, the pressure and rate of fuel injection and the air-supplied quantity increasing, the maximum wall temperature inside the filter channels rose and the oxidation rate of the deposition soot layer on the channel wall was accelerated, which shortened the regeneration process. But when the air-fuel matching ratio and air-supplied quantity increased further, the convection transfer heat loss of the gas flow through the soot layer became enhanced relatively, and when the fuel injection rate was improved further, the oxygen content in exhaust was insufficient, which would cause thecombustion performance of the burner worsening, the oxidation rate of the soot layer and the maximum wall temperature decreasing and the regeneration process slowing down. The effect on the regeneration by exhaust mass flux was similar to that of air-supplied quantity, but from the analysis results, whether it could be controlled appropriately would be very important to the filter regeneration. The above laws provide the basis and technical references for the realization of safe, reliable and efficient regeneration and optimum control for diesel particulate filter.
Number of references:22
Main heading:Air filters
Controlled terms:Diesel engines - Fuel filters - Fuel injection - Mathematical models - Particulate emissions - Soot
Uncontrolled terms:Burner-type system - Channel wall - Diesel particulate filters - Exhaust mass - Filter regeneration - Flowthrough - Fuel injection rate - Honeycomb ceramic filters - Matching ratio - Optimum control - Oxidation rates - Oxidation reactions - Oxygen content - Pyrogenation - Pyrological characteristics - Regeneration - Regeneration process - Wall temperatures
Classification code:921 Mathematics - 612.2 Diesel Engines - 523 Liquid Fuels - 522 Gas Fuels - 521 Fuel Combustion and Flame Research - 451.2 Air Pollution Control - 451.1 Air Pollution Sources
DOI:10.3969/j.issn.1002-6819.2012.20.008
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692072
Title:Design and experiment of multifunctional tillage machine with driven bent blade by stubble ploughing disk
Authors:Che, Gang (1); Zhang, Wei (1); Wan, Lin (1); Zou, Lin (2); Liang, Yuan (1)
Author affiliation:(1) Heilongjiang Ba Yi Agricultural University, Daqing 163319, China; (2) Reclamation Machinery Bureau of Heilongjiang, Harbin 154000, China
Corresponding author:Che, G.(chegang180@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:34-40
Language: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 removal maize stubble for subsequent standard procedure, a tillage machine for high-powered tractor was designed with functions of cracking stubble, rotary tillage, deep digging, ridge forming and shaping ridge simultaneouslycombined with technology of conservation agriculture in northward. The structure of self-driven curved tooth mechanism and the rotary cultivator werecompleted for better cultivating effects with field experiment. The win blades shovel is universal type, and the depth of sub soiling is above 30 cm. Motion parameters of the self-drivencombined tilling machine were optimized by several times of experiment. Rotational speed of cracker and rotavator was 33-37 r/min and 350-390 r/min, respectively. Field experiment showed that its performance can perfectly meet agriculture technique requirements. compared with classical harrow and importcombined tilling machine, this tractor increased ground-breaking rate by 2.4%-6.9%, increased cutting stubbles rate 6.3%-12.9%, and saved fuel consumption 26.3%-40.4%.
Number of references:28
Main heading:Agricultural machinery
Controlled terms:Cultivation - Design - Experiments - Tractors (truck)
Uncontrolled terms:Combined tilling - Conservation agricultures - Field experiment - High-powered tractors - Motion parameters - Rotary cultivators - Rotational speed - Self-driven - Standard procedures
Classification code:408 Structural Design - 663.1 Heavy Duty Motor Vehicles - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.20.005
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

Accession number:20124715692071
Title:Design and experiment of drip irrigation control device with low-power solar energy
Authors:Liu, Yongxin (1); Hong, Tiansheng (1); Yue, Xuejun (1); Xu, Xing (1); Wang, Yefu (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) Division of Citrus Machinery, China Agriculture Research System, Guangzhou 510642, China; (3) College of Engineering, South China Agricultural University, Guangzhou 510642, China; (4) Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba QLD 4350, Australia
Corresponding author:Yue, X.(Xuejun.Yue@usq.edu.au)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:20
Issue date:October 15, 2012
Publication year:2012
Pages:20-26
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A drip irrigation control device powered by Low Power Consumption solar energy was developed for automatic applications in remote mountainous citrus orchards. The device consists of STM8S105S6 microcontroller, real-time-calendar module, pulse solenoid valve, valve driving circuit, sensor connector, solar energy charging sub-system, and a LCD's customizable user interface. In this paper, the output characteristics of lithium battery, phosphoric acid iron battery, photovoltaic panel and quiescent current of the controller in 2.8-4.3 V battery voltage were measured. Our experiment results indicated that the maximum output power of the photovoltaic cell was 169 mW, the lowest voltage required was 3.0 V, and the minimum quiescent current was 70 μA. It's estimated that a 3.7 V lithium battery with the capacity of 834 mAh could support the device for more than 150 days without the solar power supply, and a solar charging at 42.25 mW for 30 minutes a day could support the system with non-interrupt running. This device is suitable for the automatic drip irrigation in suburban orchards with low power consumption, equipped with solar power charging, and with lightening protectors and waterproof case.
Number of references:28
Main heading:Irrigation
Controlled terms:Automation - Control - Experiments - Lithium batteries - Orchards - Phosphoric acid - Photovoltaic cells - Sensors - Solar energy - User interfaces
Uncontrolled terms:Automatic application - Battery voltages - Control device - Customizable - Drip irrigation - Driving circuits - Low Power - Low-power consumption - Maximum output power - Output characteristics - Photovoltaic panels - Power supply - Pulse solenoids - Quiescent currents - Sensor connectors - Sub-systems
Classification code:821.3 Agricultural Methods - 804.2 Inorganic Compounds - 801 Chemistry - 741.3 Optical Devices and Systems - 901.3 Engineering Research - 732 Control Devices - 722.2 Computer Peripheral Equipment - 615.2 Solar Power - 549.1 Alkali Metals - 731 Automatic Control Principles and Applications
DOI:10.3969/j.issn.1002-6819.2012.20.003
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

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