<RECORD 1>

Accession number:20124415631087
Title:Farmer cognition on water-saving irrigation technology and its influencing factors analysis
Authors:Huang, Yuxiang (1); Han, Wenting (2); Zhou, Long (1); Liu, Wenshuai (1); Liu, Jundi (4)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Institute of Water Saving Agriculture in Area Regions of China, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; (4) College of Economics and Management, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Han, W.(hanwt2000@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:113-120
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 analysis the driving forces of WSI technological choice and changing farmers' traditional irrigation methods, farmer cognition on water-saving irrigation (WSI) technology and their influencing factors were investigated. 296 households in 17 towns and 10 counties (districts) in Shaanxi province regarding greenhouse crop production were surveyed, and the farmer cognition and its influencing factors based on Structural Equation Modeling (SEM) were analyzed. The results indicated that the level of farmer cognition influenced the application and promotion of WSI technology directly. The effects of familiarity towards WSI equipment, the degree of satisfaction with existing irrigation methods, government subsidies, irrigation cost, education level, farmer's age, technical training experience and planting experience on farmer cognition on WSI technology. Thus, it can be used to prompt farmer cognition level on WSI, and regulate farmer irrigation behavior, promote adoption ratio of WSI technology, by improving farmers' rational cognition on traditional irrigation methods, expanding farmers' depth and the breadth towards WSI technology, enhancing government's macroeconomics regulation, control and supporting strength, establishing a consummate WSI technology extension system.
Number of references:26
Main heading:Factor analysis
Controlled terms:Economics - Irrigation - Sensory perception - Technical presentations - Technology - Water resources
Uncontrolled terms:Degree of satisfaction - Driving forces - Extension systems - Farmers - Government subsidies - Greenhouse crop production - Influencing factor - Influencing factors analysis - Irrigation costs - Irrigation methods  - Structural equation modeling - Structural equation models - Technical training - Traditional irrigation - Water-saving irrigation
Classification code:971 Social Sciences - 922.2 Mathematical Statistics - 901.2 Education - 901 Engineering Profession - 821.3 Agricultural Methods - 461.4 Ergonomics and Human Factors Engineering - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.18.017
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 2>

Accession number:20124415631082
Title:Effects of blade thickness on performance of axial flow pump and analysis of internal flow field
Authors:Sha, Yi (1); Hou, Liyan (2)
Author affiliation:(1) School of Mechanical and Automotive Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China; (2) Yantai Moon Co., Ltd., Yantai 264000, China
Corresponding author:Sha, Y.(shayi01@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:75-81
Language: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 variable-thickness performance of blade in a axial flow pump, a QY90-4.4-1.5 submersible axial flow pump with specific speed 550 and rotate velocity 2900 r/min, especially its particular impeller and guide vane has been designed on the basis of arc method and streamline method. Based on experiments with increasing in leaf thickness, the reason about the difference among curves of q<inf>v</inf>-H, q<inf>v</inf>-P, q<inf>v</inf>-&eta; were studied. The three-dimensional internal flow with effect of impeller blade thickness within axial flow has been numerically simulated by CFD, both the relative velocity distribution on the optimal condition and static pressure distribution on the different condition of blade surface were obtained. It can be revealed that pump performance with thin blade was improved, but the anti-cavitation was reduced. It also can be showed that the situations of flow separation, backflow and secondary flow were more serious for the thick blades, which were the main reasons for the low efficiency of pump.
Number of references:25
Main heading:Pumps
Controlled terms:Axial flow - Computational fluid dynamics - Discharge (fluid mechanics) - Flow fields - Hydraulic models - Impellers
Uncontrolled terms:Arc method - Axial flow pump - Backflow - Blade Surface - Blade thickness - Guide vane - Impeller blades - Internal flow field - Internal flows - Leaf thickness  - Optimal conditions - Performance tests - Pump performance - Specific speed - Static pressure distributions - Stream-line methods - Thickness of blade - Thin blades
Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 601.2 Machine Components - 618.2 Pumps - 631 Fluid Flow - 632.1 Hydraulics
DOI:10.3969/j.issn.1002-6819.2012.18.012
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 3>

Accession number:20124415631078
Title:Experiment of vehicle localization based on polynomial Kalman filter
Authors:Zhao, Ruqi (1); Zhao, Zuoxi (1); Zhao, Ruzhun (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) Center of Experimental Teaching for Common Basic Courses, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Zhao, Z.(zhao_zuoxi@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:49-56
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the application of polynomial Kalman filter(PKF) in the vehicle location, and to analyze state estimation accuracy of PKF affected by the order of polynomial and evaluate the performance of the PKF, in this paper, by adopting polynomial fitting method in system model of kalman filter to model nonlinear system, three PKFs were established and applied for vehicle localizaiton experiment with mulitiple sensors fusion. Firstly, previous researches on PKF in tracking accuracy affected by the order of polynomial and in performance evaluation were introduced. Then, zero-order, first-order and second-order PKF were establish using corresponding order of polynomial to fit the longitudinal velocity and heading of encoder dead-reckon model. Experiment was conducted on Pioneer3-AT moble robot platform with Encoder and AHRS used as sensor data input, measurement of RTK-GPS was as reference trajectory. Also, the theorectical error and actual error of the PKF were compared to evaluate the performance of the three PKFs. The experiment result showed that the actual error of the three PKFs were within the theorectical error bounds in more than 68% filtering time which indicated normal status of the filters. The localization accuracy of zero-order PKF were increased by 63% and 73% in X, Y axis respectively compared with encoder dead-reckon method. Localization accuracy of first-order PKF was better than zero-order, and second-order was better than zero-order but worse than first-order, which showed that polynomial fitting the longitudinal velocity and heading of encoder dead-reckon model using higher order could not contribute to even better localization accuracy. This paper provides references for the construction and performance evaluation of PKF, as well as its practical implementation on vehicle localization.
Number of references:27
Main heading:Tracking (position)
Controlled terms:Algorithms - Error analysis - Experiments - Kalman filters - Location - Polynomials - Sensors - Vehicles
Uncontrolled terms:Actual error - Error bound - First-order - Fitting - Localization accuracy - Longitudinal velocity - Multiple sensor fusion - Performance evaluation - Polynomial fitting method - Polynomial fittings  - Practical implementation - Reference trajectories - Robot platform - RTK-GPS - Second orders - Sensor data - System models - Tracking accuracy - Vehicle localization - Vehicle location
Classification code:921 Mathematics - 912 Industrial Engineering and Management - 911 Cost and Value Engineering; Industrial Economics - 901.3 Engineering Research - 801 Chemistry - 731.1 Control Systems - 723 Computer Software, Data Handling and Applications - 716.2 Radar Systems and Equipment - 432 Highway Transportation
DOI:10.3969/j.issn.1002-6819.2012.18.008
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 4>

Accession number:20124415631102
Title:Land use changes after major function oriented zoning based on SLEUTH model
Authors:Qian, Min (1); Pu, Lijie (1); Zhu, Ming (1)
Author affiliation:(1) School of Geographic and Oceanographic Science, Nanjing University, Nanjing 210093, China; (2) School of Resource and Environment, Guizhou University, Guiyang 550003, China
Corresponding author:Pu, L.(ljpu@nju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:223-232
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To provide feasible methods for solving region problems, a major function oriented zoning (MFOZ) method based on SLEUTH (slope, land use, exclusive layer, urbanization, transportation, hillshade) was proposed in this paper, which can adjust the MFOZ according to the tendency of land use change. Taking Suzhou-Wuxi region as research object, a typical rapid urbanization area, SLEUTH model was applied to simulate primary regionalization scenarios from 2009 to 2030, describing the land use change after MFOZ. Then ambiguous regions during the first zoning due to fuzzy conditions were adjusted and optimized and complete MFOZ in Suzhou-Wuxi region was obtained. The result showed that this method made MFOZ intuitively predicable and adjustable. Thus this method provides a technical supportive for reasonable implementation of MFOZ.
Number of references:31
Main heading:Land use
Controlled terms:Optimization - Zoning
Uncontrolled terms:Fuzzy conditions - Land-use change - Major function oriented zoning (MFOZ) - Research object - Suzhou-Wuxi region
Classification code:403 Urban and Regional Planning and Development - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2012.18.032
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 5>

Accession number:20124415631100
Title:Preparation and release performance of polyacrylic acid grafted alkali lignin-based iron fertilizer
Authors:Ma, Yanli (1); Wang, Ruru (1); Fang, Guizhen (1); Li, Daqi (1)
Author affiliation:(1) Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China; (2) Key Laboratory of Bio-Based Material Science and Technology, Ministry of Education, Harbin 150040, China
Corresponding author:Fang, G.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:208-214
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To improve the cumulative release rate of iron, polyacrylic acid grafted alkali lignin-based (ALS-G-P (AA)) iron fertilizer was prepared by acrylic monomer grafted the amorphous alkali lignin. The influences on water absorbency of the materials to neutralization degree of acrylic acid, the dosage of initiator and cross-linking agent, temperature and grafting degree of alkali-lignin were investigated by orthogonal test. Release performance of ALS-G-P (AA) iron fertilizer was researched. The results showed the ideal preparation conditions were as follow: the degree of acrylic acid was 60%, amount of initiator was 0.06 g and the cross-linking agent was 0.03 g, temperature was 60&deg;C and alkali-lignin grafting was 25%. Water absorbency of ALS-G-P (AA) iron fertilizer was 1017 g/g, the iron content of which was 7.74 mg/g. Effective release period of water saturated ALS-G-P (AA) iron fertilizer with was 22 days. Iron cumulative released rate of ALS-G-P (AA) iron fertilizer in water fitted a quadric equation. Curve of the iron cumulative release rate was S pattern. The study provides a reference for the efficient application of iron fertilizer, and expanded application of the alkali lignin in agricultural fields of controlled release carriers.
Number of references:32
Main heading:Iron
Controlled terms:Acrylic monomers - Carboxylic acids - Crosslinking - Fertilizers - Grafting (chemical) - Lignin - Polymerization
Uncontrolled terms:Acrylic acids - Agricultural fields - Alkali lignin - Controlled release - Cross linking agents - Grafting degree - Iron content - Neutralization degree - Orthogonal test - Polyacrylic acids  - Preparation conditions - Release performance - Release rate - Slow release - Superabsorbent polymer - Water absorbency
Classification code:545.1 Iron - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 815.1.1 Organic Polymers - 815.2 Polymerization
DOI:10.3969/j.issn.1002-6819.2012.18.030
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 6>

Accession number:20124415631097
Title:Regional differences of livestock and poultry breeding output in scale and policy suggestions during 2002-2009 in China
Authors:Fu, Qiang (1); Zhu, Yunqiang (2); Yang, Hongxin (4); Wu, Genyi (5); Yan, Lijie (6); Yang, Fei (2); Kong, Xiangsheng (3)
Author affiliation:(1) College of Environment and Planning, Henan University, Kaifeng 475004, China; (2) State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; (3) Institute of Computer and Information Engineering, Xinxiang University, Xinxiang 453003, China; (4) Department of Physics, Xinxiang University, Xinxiang 453003, China; (5) College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China; (6) Department of Surveying and Geo-Informatics, Tongji University, Shanghai 200092, China
Corresponding author:Zhu, Y.(zhuyq@lreis.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:185-191
Language: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 regional differences of large scale livestock and poultry breeding in China, the standardized pig index from province-level data of Chinese animal industry yearbooks during 2002-2009 was used in present study. Then differences of internal and interval regions of China and their six regions were examined by Theil index method. The results showed that the large scale livestock and poultry breeding ascended during 2002-2009 in general, and the rising trend became more and more significant year by year. Period from 2002 to 2006 was the slow ascending period. During this period, the overall regional differences descended generally. Period from 2007 to 2009 was the rapid ascending period, and the overall regional differences ascended rapidly. During the whole period, the internal region difference was more significant than that of interval region. Meanwhile, based on the regional difference study, the development of large scale livestock and poultry breeding in China and the analysis of contribution rate of differences inside this region, the present research suggests that local governments in the six regions should take different policies for management of the livestock and poultry breeding industry.
Number of references:30
Main heading:Agriculture
Controlled terms:Animals - Information theory - Public policy - Statistical methods
Uncontrolled terms:Contribution rate - Livestock and poultry breeding in scale - Local government - Policy suggestions - Regional differences - Theil indices
Classification code:716.1 Information Theory and Signal Processing - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 922.2 Mathematical Statistics - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2012.18.027
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 7>

Accession number:20124415631086
Title:Stochastic simulation of regional water requirement based on Copula function
Authors:Yang, Fengshun (1); Shao, Dongguo (1); Gu, Wenquan (1); Xiao, Chun (1); Tan, Xuezhi (1); Yang, Haidong (1)
Author affiliation:(1) State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
Corresponding author:Shao, D.(dgshao@whu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:107-112
Language: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 factors like socioeconomic development and climate, regional water requirement is random. In view of the fact that Copula function can be used to describe the autocorrelation of event series, stochastic simulation model of regional water requirement is established based on Copula function. This model could reflect the correlation between monthly water requirements, and overcome the disadvantage caused by the simulation of monthly water requirement independently. Taking the middle-lower reaches of Han River as study area, the availability of the proposed model is verified by the comparison between the results of the model and those of Cholesky model. Results suggested that the proposed model can preserve the statistical properties of the calculated data series, especially the skewness coefficient and correlation coefficient, and provide a new way for regional water requirement simulation.
Number of references:31
Main heading:Computer simulation
Controlled terms:Distribution functions - Stochastic models - Water resources
Uncontrolled terms:Cholesky - Copula functions - Correlation coefficient - Data series - Han river - Skewness coefficients - Socio-economic development - Statistical properties - Stochastic simulation model - Stochastic simulations  - Study areas - Water requirements
Classification code:444 Water Resources - 723.5 Computer Applications - 922.1 Probability Theory
DOI:10.3969/j.issn.1002-6819.2012.18.016
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 8>

Accession number:20124415631098
Title:Soil respiration and its affecting factors in dry-land maize field under different tillage systems
Authors:Zhang, Junli (1); Tanveer, Sikander Khan (1); Wen, Xiaoxia (1); Chen, Yuexing (1); Gao, Mingbo (1); Liu, Yang (1); Liao, Yuncheng (1)
Author affiliation:(1) College of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Liao, Y.(yunchengliao@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:192-199
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To explore the effects of different tillage systems on soil reparation during the summer maize crop growing season, the tillage systems included deep tillage (DT), no tillage (NT), rotary tillage (RT) and plow tillage (PT) was designed. The soil respiration, its affecting factors and the relationship of soil respiration rate with soil moisture, soil temperature, soil organic matter, total nitrogen and soil pH was elucidated. The results indicated that soil respiration rate was first increased then decreased during the whole crop period in all kinds of tillage systems. The maximum of soil respiration rate was DT, followed by PT, RT, NT. Soil temperature of PT was the highest, followed by DT, RT, NT from seeding to jointing stage; that of NT was the highest, followed by RT, DT, PT from tasseling to maturity stage. Soil organic matter, and Total nitrogen were gradually increased from planting to flowering stage, those of PT.was higher than those of NT. Soil pH value were significantly different during the growth stages, that of PT was the maximum, followed by RT, NT, DT. Soil moisture and soil temperature were significant correlated with soil respiration (P&gt;0.05). DT and PT were significantly correlated with soil moisture and soil temperature; soil organic matter were negatively correlated with soil respiration rate, and similarly significantly negative correlation was recorded between soil organic matter contents of DT and soil respiration rate. The negative correlations (P&gt;0.05) were recorded between total nitrogen and soil pH value for soil respiration under DT, RT, PT. The study provides a guideline for the complement of soil respiration and emission mechanism, the assessment of regional carbon input and output balance, and the establishment of feasible soil carbon regulation.
Number of references:25
Main heading:Agricultural machinery
Controlled terms:Biogeochemistry - Biological materials - Carbon - Cultivation - Nitrogen - Organic compounds - pH - Soil moisture - Soils - Temperature
Uncontrolled terms:Affecting factors - Aid farming land - Soil respiration - Summer maize - Tillage system
Classification code:821.3 Agricultural Methods - 821.1 Agricultural Machinery and Equipment - 804.1 Organic Compounds - 804 Chemical Products Generally - 801.2 Biochemistry - 801.1 Chemistry, General - 641.1 Thermodynamics - 483.1 Soils and Soil Mechanics - 461.2 Biological Materials and Tissue Engineering
DOI:10.3969/j.issn.1002-6819.2012.18.028
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 9>

Accession number:20124415631101
Title:Suitability evaluation and consolidation division of rural residential areas in villages and towns
Authors:Kong, Xuesong (1); Liu, Yaolin (1); Deng, Xuankai (1); Luo, Ti (1)
Author affiliation:(1) School of Resource and Environment Science, Wuhan University, Wuhan 430079, China; (2) Key Laboratory of Geographic Information System, Ministry of Education, Wuhan University, Wuhan 430079, China
Corresponding author:Liu, Y.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:215-222
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:Suitability evaluation of rural residential areas is the basis of land consolidation division. Taking Yuyue town and Guanqiao town as cases, the suitability evaluation indexes of rural residential areas were established based on three factors of nature, society and economy, ecology, and quantitative system and characterization of indexes were analyzed. The consolidation division of rural residential areas was realized by coordinating rural-urban development and suitability classification. The results showed that the difference of suitability was apparent between Yuyue and Guanqiao, and the suitability of rural residential areas in Yuyue town was higher than that of Guanqiao town. Converting from rural residential areas into town land should be regarded as key consolidation way in Yuyue town, while spatial migration for scattered rural residential areas was the main way in Guanqiao town. Consolidation areas and planning areas were well organized based on spatial integration among different division areas, which can provide decisive support for rural residential land consolidation.
Number of references:27
Main heading:Rural areas
Controlled terms:Classification (of information) - Economics - Land use - Remediation - Urban growth
Uncontrolled terms:Quantitative systems - Residential areas - Spatial migration - Suitability evaluation - Villages and towns
Classification code:403 Urban and Regional Planning and Development - 403.1 Urban Planning and Development - 454.2 Environmental Impact and Protection - 716.1 Information Theory and Signal Processing - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2012.18.031
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 10>

Accession number:20124415631083
Title:Simulation study on freeze-thaw damage of hydraulic concrete in construction period
Authors:Guo, Lixia (1); Luo, Guojie (1); Zhong, Ling (1); Chen, Shoukai (1)
Author affiliation:(1) North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China
Corresponding author:Guo, L.(guolx@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:82-87
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:During the long construction of hydraulic concrete, frost heave is one of the key factors which can result in concrete crack. Based on the previous studies and the analysis on freeze-thaw characteristics of concrete, new models for predicting elasticity coefficient and tensile strength with changes of age and freezing times were proposed. With the application of the 3-d finite element program, the process of frost heave damaging of concrete during construction period were simulated. Results showed that the calculated results had a good coincidence with the actual rules of crack. This research provides a useful reference for concrete projects.
Number of references:23
Main heading:Freezing
Controlled terms:Computer simulation - Concrete construction - Construction - Design - Elasticity
Uncontrolled terms:Concrete cracks - Construction period - During construction - Elasticity coefficients - Finite element programs - Freeze-thaw - Freeze-thaw damage - Frost heave - Hydraulic concrete - Simulation studies
Classification code:405 Construction Equipment and Methods; Surveying - 408 Structural Design - 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 723.5 Computer Applications - 822.2 Food Processing Operations
DOI:10.3969/j.issn.1002-6819.2012.18.013
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 11>

Accession number:20124415631096
Title:Relevance of hyperspectral image feature to catalase activity in eggplant leaves with grey mold disease
Authors:Xie, Chuanqi (1); Feng, Lei (1); Feng, Bin (2); Li, Xiaoli (1); Liu, Fei (1); He, Yong (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; (2) National Agriculture Exhibition Center, Beijing 100026, China
Corresponding author:Feng, L.(Lfeng@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:177-184
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Hyperspectral imaging feature of catalase activity in eggplant leaves stressed by grey mold was researched. Hyperspectral imagings of healthy, slight, moderate and heavy infected eggplant leaves were obtained by hyperspectral imaging system across the wavelength region of 400-100 nm and diffuse spectral response of objects from hyperspectral imaging was extracted by ENVI software. Then, different preprocessing methods were used to improve the signal noise ratio (SNR) including smoothing, median filter and normalization et al. The models of hyperspectral imaging response and catalase activity were built by the partial least squares regression (PLSR), least squares support vector machines (LS-SVM) and BP neural network (BPNN). The first two latent variables suggested by PLSR model can qualitatively distinguish healthy, slight, moderate and heavy infected eggplant leaves, the coefficient of determination (R²) of BPNN model built by the nine latent variables recommended by PLSR model is 0.8930 and the root mean square error of prediction (RMSEP) is 2.17&times;10³. It demonstrated that catalase activity in eggplant leaves can be effectively detected and disease degree of eggplant leaves stressed by grey mold can also be effectively distinguished by the hyperspectral imaging technique.
Number of references:26
Main heading:Spectroscopy
Controlled terms:Image recognition - Imaging techniques - Mean square error - Models - Molds - Neural networks - Support vector machines
Uncontrolled terms:BP neural networks - Catalase - Catalase activity - Coefficient of determination - Eggplant - Grey mold - Hyper-spectral images - HyperSpectral - Hyperspectral Imaging - Hyperspectral imaging systems  - Latent variable - Least squares support vector machines - Partial least-squares regression - Pre-processing method - Root-mean-square error of predictions - Signal-noise ratio - Spectral response - Wavelength regions
Classification code:902.1 Engineering Graphics - 816.2 Plants and Machinery for Plastics and Other Polymers - 801 Chemistry - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television
DOI:10.3969/j.issn.1002-6819.2012.18.026
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 12>

Accession number:20124415631080
Title:Effects of proportions of biodiesel/diesel blends on structures of diesel engine particulates
Authors:Ma, Zhihao (1); Zhang, Xiaoyu (2); Ma, Fanhua (3); Duan, Junfa (1); Xu, Bin (2); Wu, Jian (2)
Author affiliation:(1) Key Lab. of Clean Energy Engine and Engineering Vehicles, North China University of Water Resource and Electric Power, Zhengzhou 450011, China; (2) College of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China; (3) State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Corresponding author:Ma, Z.(mazhihao@mail.haust.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:64-68
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the effects of engine loads and proportions of biodiesel/diesel blends on the particulate emissions, morphology and microstructure of particulates emitted from an electronic controlled high pressure common rail diesel engine were investigated by using HRTEM under the two operating conditions of rotation speed at 2000 r/min and torque at 75 N&middotm and 2000 r/min and 225 N&middotm, and four kinds of proportions of biodiesel/diesel blends (B0, B10, B50 and B100). The results indicated that the primary particles generated only by B100 present irregular shape and very different particle sizes. However, the spherical primary particles consisting of the soot generated by the other fuels are typically monodisperse. The primary particles have multilayer graphite-like microcrystal structure. There exists torsion and translation between the carbon lamella. Disordered core zone is inside the primary particle. Under the operating condition of 2000 r/min and 225 N&middotm, the mean diameter of primary particle for B100 was 45.57 nm and very different from the other three fuels. Engine loads and proportions of biodiesel/diesel in the blends which were lower than 50% have little influence on the mean diameter of primary particle. The results can provide references for the formation mechanisms of diesel particulates and the design of after-treatment system.
Number of references:21
Main heading:Diesel engines
Controlled terms:Fuels - Particulate emissions
Uncontrolled terms:After-treatment - Core zones - Diesel particulate - Engine load - Formation mechanism - High pressure common rail diesel engine - HRTEM - Irregular shape - Mean diameter - Monodisperse  - Operating condition - Particulate - Primary particles - Rotation speed
Classification code:451.1 Air Pollution Sources - 522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 612.2 Diesel Engines
DOI:10.3969/j.issn.1002-6819.2012.18.010
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 13>

Accession number:20124415631077
Title:Relationship between steering power ratio and turning coefficient of tracked vehicle adopting differential steering mechanism
Authors:Chi, Yuan (1)
Author affiliation:(1) Engineering College, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Chi, Y.(cy207@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:44-48
Language: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 engine power increases for tracked vehicle adopting differential steering mechanism in hydro-mechanical double-power driving system, the steering power ratio, turning coefficient and the relationship between them were theoretically studied. Compared with steering power ratio and turning coefficient radials (&xi;-&upsilon;) of the other steering mechanisms, the power increasing rate was analyzed. The prototype was tested and the relationship between steering power ratio and turning coefficient was acquired through experiment and calculation. &xi;-&upsilon; radials was acquired according to the experiment data. The turning performance of the differential steering mechanism was evaluated according to the study results. This research provides a reference for the advanced study on hydro-mechanical double-power driving system adopting differential steering mechanism for tracked vehicle.
Number of references:21
Main heading:Automobile steering equipment
Controlled terms:Experiments - Steering - Tracked vehicles - Vehicles
Uncontrolled terms:Coefficient - Differential steering mechanism - Driving systems - Engine power - Experiment data - Hydro-mechanical - Loads - Power increasing rate - Power ratio - Steering mechanisms  - Turning performance
Classification code:432 Highway Transportation - 663 Buses, Tractors and Trucks - 663.2 Heavy Duty Motor Vehicle Components - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.18.007
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 14>

Accession number:20124415631099
Title:Spatial variability of groundwater nitrate-nitrogen and cause analysis of its pollution for irrigation area with reclaimed water
Authors:Yin, Shiyang (1); Wu, Wenyong (1); Liu, Honglu (1); Zhang, Xianquan (3)
Author affiliation:(1) Beijing Hydraulic Research Institute, Beijing 100048, China; (2) Beijing Eng. Tech. Res. Ctr. for Explor. and Utiliz. of Non-Conventional Water Rsrc., Beijing 100048, China; (3) Beijing Management Center of Hydraulic Engineering Construction, Beijing 100036, China
Corresponding author:Yin, S.(yinshiyang@yahoo.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:200-207
Language: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 analysis the spatial distribution of groundwater nitrate-nitrogen and its pollution causes of reclaimed water irrigation region in Beijing, based on geostatistics model and geostatistical analyst module of ArcGIS. The spatial distribution maps of groundwater nitrate-nitrogen and semi-variogram function was proposed, which represented the probability and structural characteristics. The results showed that the groundwater nitrate-nitrogen satisfied log normal distribution and one-order Gaussian model can capture the characteristics well in the reclaimed water irrigation region. The prediction of distance statistical correlation of groundwater nitrate-nitrogen was 9639.36 m, and the distance between two sampling sits should be smaller than this value. The nugget effect value was 0.43, which implied that nitrate-nitrogen concentration distribution was controlled by structural factors and human activity. Land use style and groundwater withdrawal intensity directly influenced the probability of groundwater nitrate-nitrogen pollution. The depth of monitoring wells was smaller, the decline of groundwater level was greater, the increase in groundwater nitrate-nitrogen was greater. The risk of nitrate-nitrogen pollution of groundwater caused by accumulated areas of reclaimed water maintained low. The study provides a reference for quantifying the groundwater pollution risk and security of wastewater utilization in agriculture.
Number of references:37
Main heading:Groundwater pollution
Controlled terms:Groundwater - Irrigation - Nitrates - Nitrogen - Normal distribution - Pollution - Reclamation - Spatial distribution
Uncontrolled terms:Concentration distributions - Gaussian model - Geo-statistics - Geostatistical - Groundwater withdrawal - Human activities - Irrigation area - Log-normal distribution - Monitoring wells - Nitrate nitrogen  - Nugget-effect - Re-claimed water - Semivariograms - Spatial distribution map - Spatial variability - Statistical correlation - Structural characteristics - Structural factor
Classification code:921 Mathematics - 821.3 Agricultural Methods - 804.2 Inorganic Compounds - 922.1 Probability Theory - 804 Chemical Products Generally - 452.4 Industrial Wastes Treatment and Disposal - 444.2 Groundwater - 454.2 Environmental Impact and Protection
DOI:10.3969/j.issn.1002-6819.2012.18.029
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 15>

Accession number:20124415631081
Title:Hydraulic characteristics of swirling fluidized-sand biofilter
Authors:Zhang, Haigeng (1); Wu, Fan (1); Zhang, Yulei (1); Song, Benben (1); Song, Hongqiao (1); Ni, Qi (1)
Author affiliation:(1) Laboratory of Fishery Equipment and Engineering, Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, China
Corresponding author:Wu, F.(wufan@fmiri.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:69-74
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to evaluate the working performance of fluidized sand biofilter, and determine the optimal design parameter, a swirling fluidized-sand was designed, which used quartz sand as media. This paper discussed the effect of size and initial thickness of sand bed on the fluidizing performance. Double factor test was designed with different ranges of quartz sand (0.18 to 0.25, &gt;0.25 to 0.425 and &gt;0.425 to 0.6 mm) and different initial thickness of sand bed (40, 50, 60, 70, 80 and 90 cm). The results showed that the minimum fluidization velocities in three groups of different sizes range for quartz were (0.061&plusmn;0.0088) cm/s, (0.25&plusmn;0.011) and (0.48&plusmn;0.014) cm/s, respectively. To keeping sand bed at optimum fluidized state, the ratios of initial thickness of sand bed to the diameter of circular vessel should be greater than 1.43, 1.78 and 2.14, respectively, and the ratio was proportional to the size of quartz sand. The superficial velocity remained constant, while the initial thickness of sand bed increased at the same expansion ratio state. The pressure drop test showed that the pressure drop values per unit sand bed thickness for different sizes of quartz sand were (7530.66&plusmn;215.98), (6925.66&plusmn;364.58) and (6790.08&plusmn;277.95) Pa/m, respectively. The measured value was close to the theoretical value under the condition of quartz sand with 0.18 to 0.25 mm, and error was 2% to 3%. Based on Ergun equation, the mathematical model of minimum fluidization velocity was proposed according to the measured value by regression method, and it can provide a technical basis for the design and application of fluidized-sand biofilter.
Number of references:25
Main heading:Sand
Controlled terms:Biofilters - Buoyancy - Fluidization - Fluidized beds - Mathematical models - Pressure drop - Quartz - Velocity
Uncontrolled terms:Critical fluidization velocity - Design and application - Different sizes - Ergun equation - Expansion ratio - Hydraulic characteristic - Initial thickness - Minimum fluidization velocity - Optimal design parameters - Per unit  - Quartz sand - Regression method - Sand biofilter - Sand-beds - Superficial velocity - Surface velocity - Theoretical values
Classification code:921 Mathematics - 802.3 Chemical Operations - 802.1 Chemical Plants and Equipment - 931.1 Mechanics - 631 Fluid Flow - 482.2 Minerals - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 505 Mines and Mining, Nonmetallic
DOI:10.3969/j.issn.1002-6819.2012.18.011
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 16>

Accession number:20124415631103
Title:Ecological and landscape design of farmland shelterbelt in land consolidation
Authors:Liu, Wenping (1); Yu, Zhenrong (1); Yun, Wenju (2); Xiao, He (1); Zhang, Qian (1)
Author affiliation:(1) Department of Ecology and Engineering, College of Resources and Environmental Sciences, China Agriculture University, Beijing 100193, China; (2) Centre of Land Consolidation, Ministry of Land and Resource, Beijing 100035, China
Corresponding author:Yu, Z.(yuzhr@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:18
Issue date:September 15, 2012
Publication year:2012
Pages:233-240
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The quick and effective improvement of farmland shelterbelts has become an urgent task for ecological landscape design in land consolidation. On the basis of field investigation, the spatial arrangement and composition of present shelterbelts were determined in farmlands in this study. Major parameters of the shelterbelts like porosity, effective protection distance and ground area were analyzed and important functional areas and landscape structures including advantage landscape space, landscape node, important landscape axis, were identified in the experimental area. A new shelterbelt system based on ecological landscape process was designed, which could much better support the ecological functions of the investigated landscape. The new design included an improved plant composition and structure, and minimized the required land area for the construction of shelterbelts. The results of this study showed that a careful shelterbelt design, which also considered present landscape features and was inherent ecological processes, achieved an effective improvement of deteriorated farmlands. This research provides methods to design ecological landscape of farmland shelterbelt in land consolidation.
Number of references:28
Main heading:Farms
Controlled terms:Consolidation - Design - Ecology - Land use - Planning - Plants (botany)
Uncontrolled terms:Ecological design - Ecological functions - Ecological process - Farmland shelterbelt - Field investigation - Functional areas - Ground area - Land areas - Landscape design - Landscape feature  - Landscape structures - New design - Plant composition - Spatial arrangements
Classification code:403 Urban and Regional Planning and Development - 408 Structural Design - 454.3 Ecology and Ecosystems - 461.9 Biology - 483 Soil Mechanics and Foundations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2012.18.033
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 17>

Accession number:20124415631084
Title:Effects of connecting patterns of branch pipes on superposed water hammer pressure in trunk pipe for the PVC pipeline system
Authors:Wei, Chuang (1); Li, Mingsi (1); Li, Dongwei (1); Lei, Chengxia (1)
Author affiliation:(1) College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi 832000, China; (2) Shanxi Conservancy Technical College, Yuncheng 044004, China
Corresponding author:Li, M.(leemince-709@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:88-97
Language: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 reasonably design irrigational pipe system and develop the theories of pipe system plan for the pipeline network irrigation district, the effects of inlets of branch pipes with differential spacing interval and diversion angel on the superimposed water hammer in main pipe were studied by experiments and simulations based on the PVC-U dendritic pipe network system. Diameter of PVC-U dendritic pipe was designed as 200 mm, the inlets spacing interval of branch pipes as 0, 6.2, 12.4, and 18.6 m respectively, and diversion angel as 90&deg;, 60&deg;, and 45&deg; respectively. A centrifugal pump with designed head of 28 m and designed capacity of 374 m³/h was employed to supply pressure fluid to the pipeline system. The results indicated that the corresponding superimposed pressure value in the main pipe increased from 23.5 m to 30.1 m with inlets spacing interval reducing from 18.6 m to 0 m, and the superimposed pressure of water hammer in main pipe increased from 30.1 m to 34.9 m with the diversion angel decreasing from 90&deg; to 45&deg;. The superimposed water hammer in main pipe was exponentially lower with increasing spacing interval and the diversion angel of tributary pipes inlets. In dendritic pipe network system, a spacing interval of diversion inlets should be designed in the range of 0 to a half of field width or more, and diversion angel as 90 degree. These results are helpful to the design and operation of the dendritic pipe network system for water delivering and distributing.
Number of references:26
Main heading:Polyvinyl chlorides
Controlled terms:Centrifugal pumps - Computer simulation - Design - Piping systems - Water hammer - Water pipelines - Water supply
Uncontrolled terms:Branch pipes - Design and operations - Irrigation districts - Pipe networks - Pipe system - Pipe-line systems - Pipeline networks - Pressure of water - Pressure values - Supply pressure  - Water delivery - Water hammer pressure - With inlets
Classification code:815.1.1 Organic Polymers - 723.5 Computer Applications - 631.1 Fluid Flow, General - 618.2 Pumps - 446.1 Water Supply Systems - 408 Structural Design - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2012.18.014
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 18>

Accession number:20124415631104
Title:Determination of consolidation priority for farmland at county level using grid method
Authors:Shen, Lihong (1); Zhang, Chao (1); Sang, Lingling (1); Chen, Yating (1); Zhang, Xiaodong (1); Yang, Jianyu (1); Zhu, Dehai (1); Yun, Wenju (2)
Author affiliation:(1) College of Information and Electrical Engineering, China Agriculture University, Beijing 100083, China; (2) China Land Consolidation and Rehabilitation, Beijing 100035, China; (3) Key Laboratory for Agricultural Land Quality, Monitoring and Control of the Ministry of Land and Resources, Beijing 100035, China
Corresponding author:Zhang, C.(zhangchao_bj@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:241-247
Language: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 scientifically calculate the difficulty coefficient of farmland construction and reasonably determine the priorities of the consolidation units, an indicator system of the farmland consolidation priorities evaluation was constructed. Taking Baoying county, Jiangsu province as an example, the system was based on the study of land use character, with regular grids as evaluation unit, and was from five influencing aspects including land use structure, spatial pattern of farmland, improvable production capacity, soil environmental quality, social population factor on research unit of regular grid. The farmland consolidation priorities of the study area were calculated with 532 grid units of evaluation which were divided by 1' &times; 1' latitude and longitude grid. Based on the consolidation priorities, the study area were classified into three classes: short term, medium term and long term grid unit, whose ratio was 26%, 35% and 39%, respectively. The long term grids distributed in the central and plain area of southern Baoying county, where had better characters of farmland spatial pattern, low fragmentation degree and better farmland qualities. The results demonstrated that the method proposed in this paper was helpful to determine the farmland consolidation priorities and clarified the priority consolidation areas and directions. This research provides support and scientific reference for regional farmland consolidation planning and high standard basic farmland construction at county level.
Number of references:21
Main heading:Farms
Controlled terms:Consolidation - Land use - Planning
Uncontrolled terms:Baoying county - County level - Difficulty coefficient - Environmental quality - Farmland - Fragmentation degree - Grid methods - Grids - High standards - Indicator system  - Jiangsu province - Land-use structures - Medium term - Priority - Production capacity - Regular grids - Short term - Spatial patterns - Study areas
Classification code:403 Urban and Regional Planning and Development - 483 Soil Mechanics and Foundations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2012.18.034
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 19>

Accession number:20124415631073
Title:Improvement design and test to key components of castor capsule hulling device
Authors:Cao, Yuhua (1); Li, Changyou (1); Zhang, Zengxue (1); Qing, Yanmei (1); Yao, Liangliang (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agricultural Machine and Equipment, College of Engineering, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Li, C.(licyx@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:18
Issue date:September 15, 2012
Publication year:2012
Pages:16-22
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A hulling device was designed and optimized based on the physical characteristic of castor capsule in order to increase hulling rate and decrease breaking rate. A mathematical model of force and deformation was proposed. The relationship among extrusion pressure P, rolling angle &alpha;, roller deformation &Delta;R, clearance between two rollers, diameter of castor capsule and diameter of roller were obtained by MATLAB calculation. Results showed that rotation rate of rollers, clearance between two rollers and rate differential between rollers were main factors to the castor capsules' hulling. The final optimized parameters for the best hulling rate were rotation rate at 10 r/min, clearance between rollers 18 mm, rate differential 30 r/min, while factors combination of optimizing breaking rate were rotation rate 10 r/min, clearance between rollers 12 mm, rate differential 30 r/min. And the optimized parameters for the best breaking rate were rotation rate at 10 r/min, clearance between rollers 12 mm, rate differential 30 r/min. This research provides a reference for relative hulling device design and mechanism analysis.
Number of references:29
Main heading:Rollers (machine components)
Controlled terms:Deformation - Mathematical models - Optimization - Rotation - Stress analysis
Uncontrolled terms:Castor capsule hulling - Design and tests - Device design - Extrusion pressure - Hulling rate - Mechanism analysis - Optimized parameter - Physical characteristics - Rotation rate
Classification code:951 Materials Science - 921.5 Optimization Techniques - 921 Mathematics - 601.2 Machine Components - 601.1 Mechanical Devices - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2012.18.003
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 20>

Accession number:20124415631109
Title:Optimization on cleaning sterilization processing of cherry tomato
Authors:Yin, Yilei (1); Wang, Li (1); Lian, Qinglong (1); Li, Shao (1); Lu, Shaowei (1); Deng, Yongjun (2)
Author affiliation:(1) Chinese Academy of Agricultural Engineering, Beijing 100125, China; (2) School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China; (3) Key Laboratory of Farm Building in Structure and Construction, Ministry of Agriculture, Beijing 100125, China
Corresponding author:Wang, L.(wanglicaaeg@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:275-280
Language: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 develop the potential of food safety and commercial value focusing on better appearance and taste, longer storage time and higher good fruits rate, Ning Xia cherry tomatoes were used as materials. The multi-slot automatic-transmission vegetable washing machines and hypochlorite disinfection equipment were applied to clean cherry tomatoes, and the ideal cleaning process parameters were determined by cold preservation experiment. The results showed that the maximum capacity for the vegetable washing machine was 15 kg, the ideal cleaning time was 170 s, under these conditions, the cleaning rate was 99.3%. The sterilization with 100 &mu;g/mL hypochlorite solution for 85 s reduced 1.128 log value of bacterial volume on the surface of cherry tomatoes. With 100 &mu;g/mL hypochlorite-sterilization, the good fruits rate was 77% after stored at 10&deg;C for 18 days. The study provides a reference for washing sterilization process of cherry tomatoes.
Number of references:21
Main heading:Sterilization (cleaning)
Controlled terms:Energy storage - Fruits - Optimization - Vegetables - Washers - Washing machines
Uncontrolled terms:Cherry tomato - Cleaning process - Cleaning rate - Hypochlorite solutions - Sterilization process - Storage time
Classification code:601.1 Mechanical Devices - 601.2 Machine Components - 702 Electric Batteries and Fuel Cells - 821.4 Agricultural Products - 822.2 Food Processing Operations - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2012.18.039
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 21>

Accession number:20124415631079
Title:Air-fuel ratio and combustion characteristics for linear engine at low speed
Authors:Yin, Zhaolei (1); Wang, Zhe (1); Deng, Jun (1); Luan, Yanlong (1); Wang, Xiaoqin (1); Zhang, Tong (1)
Author affiliation:(1) Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China
Corresponding author:Wang, Z.(wangzhe@tongji.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:57-63
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on the linear engine prototype designed independently, the starting experiment of linear engine was carried out. The calculation formula of the cycle intake air of linear engine in low revolution was obtained by using the speed-density method and the injector flow characteristic was calibrated through experiments. With this formula and the flow characteristics of injector in linear engine, as well as intake pressure and cylinder pressure data, it was calculated that the air fuel ratio was 7.92 and the total heat release was 66 J at the engine speed of 575 r/min when the fuel injection pulse width was 5.4 ms and the ignition timing was 1.0 mm before the top dead center. The results showed that, when the piston was at 26 mm before the top dead center, the linearity between the cycle intake air quality and the intake air pressure in intake port reached the best value of 0.03. The results can provide reference materials to the analyses of air fuel ratio and combustion characteristics of linear engine.
Number of references:29
Main heading:Engines
Controlled terms:Air engines - Air intakes - Air quality - Atmospheric pressure - Combustion - Engine cylinders - Experiments - Fuels - Ignition - Jet pumps  - Pressure
Uncontrolled terms:Air fuel ratios - Best value - Calculation formula - Combustion characteristics - Cylinder pressure data - Engine speed - Flow characteristic - Ignition timing - Injection pulse width - Intake air  - Intake port - Intake pressure - Low speed - Reference material - Speed-density - Top dead center - Total heat release
Classification code:901.3 Engineering Research - 641 Heat and Mass Transfer; Thermodynamics - 631.1 Fluid Flow, General - 618.2 Pumps - 612.1.1 Internal Combustion Engine Components - 931.1 Mechanics - 612 Engines - 523 Liquid Fuels - 522 Gas Fuels - 521.1 Fuel Combustion - 443.1 Atmospheric Properties - 524 Solid Fuels
DOI:10.3969/j.issn.1002-6819.2012.18.009
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 22>

Accession number:20124415631092
Title:Overlap and skip evaluation for agricultural machinery operation based on GPS track logs
Authors:Liu, Hui (1); Meng, Zhijun (2); Fu, Weiqiang (2)
Author affiliation:(1) Information Engineering College, Capital Normal University, Beijing 100048, China; (2) National Research Center of Intelligent Equipment for Agriculture, Beijing 100097, China
Corresponding author:Liu, H.(liuhui_mail@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:149-154
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To evaluate swathing efficiency during agricultural machinery operation, swath overalp and skip areas were analyzed by GIS spatial analysis methods based on GPS track logs. Some assessment indexes including overlap rate for field and skip rate for field indicating agricultural machinery operation quality were proposed in this paper. Overlap rate and skip rate of some fields in different agricultural applications were calculated based on GPS track logs of agricultural machinery. In wheat harvest, overlap rate was more than skip rate, and the highest overlap rate was up to 13.30%. In fertilizer application, skip rate was more than overlap rate and the highest skip rate was up to 13.80%. In pesticide application, overlap rate was more than skip rate and the highest overlap rate was up to 12.93%. The above results reflected the actual operation situation. These results showed that there was obviously overlap or skip between swaths during agricultural machinery operation without guidance, which could lead to high operation costs, low swathing efficiency and even affect farmland environment safety. The research provides an effective evaluation tool for agricultural machinery operation supervision.
Number of references:20
Main heading:Agricultural machinery
Controlled terms:Efficiency - Global positioning system
Uncontrolled terms:Actual operation - Assessment indexes - Evaluation tool - Fertilizer applications - Operation cost - Operation quality - Overlap between swaths - Overlap rate - Skip between swaths - Spatial analysis  - Wheat harvest
Classification code:716.3 Radio Systems and Equipment - 821.1 Agricultural Machinery and Equipment - 913.1 Production Engineering
DOI:10.3969/j.issn.1002-6819.2012.18.022
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 23>

Accession number:20124415631076
Title:Effect of sowing patterns on growth, development and yield formation of wheat in rice stubble land
Authors:Li, Chaosu (1); Tang, Yonglu (1); Wu, Chun (1); Huang, Gang (1)
Author affiliation:(1) Crop Research Institute, Sichuan Academy of Agricultural Science, Chengdu 610066, China; (2) Key Laboratory of Water-Saving Agriculture for Hilly Areas of Southern China in Sichuan Province, Chengdu 610066, China
Corresponding author:Tang, Y.(ttyycc88@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:36-43
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Artificial broadcast sowing of wheat in rice stubble land, under no-tillage conditions, has been widely used in the Southwest Region of China. In order to study the effects of wheat sown with the 2BMFDC-6 seeder on seedling quality, growth, development and yield, comparative tests between artificial broadcast sowing and machine seeder sowing under no-tillage condition were conducted in Guanghan, Sichuan Province from 2009 to 2012. The results indicated that sowing efficiency, emergence rate, seedling uniformity and individual and population quality in the seedling stage of the machine sowing treatment was higher than that by artificial broadcast sowing treatment. However, in the later growth stages, individual and whole plot data of machine sowing treatment were lower. The amount of dry matter accumulation and leaf area index in the flowering stage were decreased by 1.8% and 8.9%, respectively in the 2BMFDC-6 sowing treatment as compared to artificial broadcast sowing treatment. In the maturity stage, seed setting spikelets and grains per spike was less in machine sowing treatment, which was lower than that in artificial broadcast sowing treatment at 4.2% and 3.5%, respectively. 1000-grain weight was increased by 4.9% in machine sowing treatment. The yields of the two treatments was equivalent. In the flowering stage, available soil nitrogen in the 2BMFDC-6 seeder treatment in the arable layer was reduced by 7.8%, and plant total nitrogen was reduced by 19.4% compared with artificial broadcast sowing treatment. With the increase of the application of nitrogen fertilizer, the growth and yield parameters of plots seeded by the 2BMFDC-6 seeder were significantly improved. On the basis of these results, we concluded that the 2BMFDC-6 seeder improved the sowing and seedling emergence quality of wheat in rice stubble land, appropriate nitrogen application is needed to achieve higher growth quality and yield.
Number of references:31
Main heading:Grain (agricultural product)
Controlled terms:Agricultural machinery - Forestry - Growth (materials) - Nitrogen - Nitrogen fertilizers
Uncontrolled terms:2BMFDC-6 seeder sowing - Artificial broadcast sowing - Comparative tests - Dry matter accumulation - Flowering stage - Growth and yield - Growth stages - Leaf Area Index - Maturity stages - No tillage  - Seed-setting - Seedling emergence - Seedling quality - Sichuan province - Soil nitrogen - Total nitrogen - Wheat in rice stubble land - Yield formation
Classification code:804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2012.18.006
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 24>

Accession number:20124415631105
Title:Qualification of multifractal features of three-dimensional geomorphology in Chabagou catchment
Authors:Lu, Kexin (1); Wang, Min (2); Li, Zhanbin (1); Cui, Lingzhou (3)
Author affiliation:(1) Key Lab. of Northwest Water Resources and Environment Ecology of MOE, Xi'an University of Technology, Xi'an 710048, China; (2) Henan Investigation and Design Institute of Water Conservancy, Zhengzhou 450016, China; (3) School of Life and Environmental Science, Wenzhou University, Wenzhou 325027, China
Corresponding author:Lu, K.(lkx2942@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:248-254
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Quantifying three-dimensional geomorphology feature of watershed synthetically and scientifically is one of key problems in the fields of geomorphology and watershed soil erosion prediction model. According to the obvious anisotropy and three-dimensional characteristics of watershed feature, based on multifractal theory, the GIS-based qualification model and its realization method of multifractal spectrums of watershed three-dimensional geomorphology was established firstly in the paper. Based on the established model and DEM data of study watersheds, multifractal spectrums and its main parameters of watershed three-dimensional geomorphology of seven typical sub-watersheds in Chabagou watershed were calculated and analyzed, and the multifractal features of watershed three-dimensional geomorphology of the seven study sub-watersheds and geomorphologic meanings of multifractal spectrums and its main parameters were studied finally. The results indicated that: 1) the qualification model established in the paper could be used to realize direct qualification of multifractal spectrums and its main parameters of watershed three-dimensional geomorphology; 2) the three-dimensional geomorphologies of the five sub-watersheds had significant multifractal features; 3) the multifractal spectrum and its main parameters could express the total three-dimensional geomorphologic characteristics of a watershed more sensitively and comprehensively than the simple fractal, and could scientifically represent and emphasize inner fine structure and abnormity partial variations of watershed three-dimensional geomorphology. The results in the paper provide a new approach and thought for synthetical and scientifical qualification of watershed three-dimensional geomorphology.
Number of references:21
Main heading:Three dimensional
Controlled terms:Catchments - Fractals - Geographic information systems - Geomorphology - Landforms - Models - Watersheds
Uncontrolled terms:Dem datum - Fine structures - Main parameters - Multi fractals - Multi-fractal spectrum - Multifractal theory - Qualification model - Realization method - Soil erosion - Three-dimensional characteristics  - Watershed features
Classification code:921 Mathematics - 902.1 Engineering Graphics - 723.3 Database Systems - 481.1.1 Geomorphology - 481.1 Geology - 444.1 Surface Water - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.18.035
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 25>

Accession number:20124415631108
Title:Effects of blanching treatments on quality of carrot pulp and its processing optimization
Authors:Liu, Chunlin (1); Chen, Yilun (1); Xie, Fangchao (1); Zhang, Qi (1)
Author affiliation:(1) College of Food Science and Engineering, Shandong Agricultural University, Taian 271018, China
Corresponding author:Chen, Y.(cylun@sdau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:269-274
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the quality of carrot pulp, the fresh carrot (cv: Eastern Six-inch) was taken as raw materials, and the content of &beta;-carotene in carrot pulp was determined by high performance liquid chromatography. Effects of four different blanching methods, including hot water blanching, steam blanching, vitamin C blanching and citric acid blanching treatments on the content of &beta;-carotene in carrot pulp were studied, and the blanching process technology was optimized by Box-Behnken response surface method. The results showed that the citric acid blanching was the best blanching method, and the best blanching conditions were as follow: the citric acid mass fraction was 1.4%, blanching time was 18 min, blanching temperature was 84&deg;C, the mass fraction of &beta;-carotene was 23.59 mg/kg, which matched with the predict value by the model. The research provides a reference for improving the quality of carrot pulp.
Number of references:19
Main heading:Blanching
Controlled terms:Citric acid - Food storage - Fruit juices - High performance liquid chromatography - Optimization - Pulp - Quality control
Uncontrolled terms:Acid mass fraction - Blanching process - Box-Behnken - Hot water - Mass fraction - Processing optimizations - Response surface method - Vitamin C
Classification code:801 Chemistry - 811.1 Pulp and Paper - 822 Food Technology - 913.3 Quality Assurance and Control - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2012.18.038
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 26>

Accession number:20124415631088
Title:Effects of alternated different irrigation amount modes on growth regulation and water use of Jatropha curcas L.
Authors:Yang, Qiliang (1); Sun, Yingjie (1); Qi, Yafeng (1); Liu, Yanwei (1); Wang, Chengwu (1); Liu, Xiaogang (1); Ge, Zhenyang (1)
Author affiliation:(1) Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China
Corresponding author:Yang, Q.(yangqilianglovena@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:121-126
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A pot-grown Jatropha curcas L. experiment was conducted to investigate the effects of alternated different irrigation amount modes on growth regulation and water use efficiency. Four watering treatment mode were designed in pot experiment, i.e. T1(every time irrigation amount for 10 mm), T2 (every time every time irrigation amount for 20 mm), T3 (every time every time irrigation amount for 30 mm), T4 (repeated alternate two kinds of combined irrigation amount as 10 mm or 30 mm). Result show that: 1) Jatropha curcas L. can live in the environment where irrigation amount was 10 mm and irrigation cycle was 7 d, it was thus clear that it showed great resistance ability to drought stress under T1 treatment, the reason for continue to live and adapt to drought environment was not only by stopping growth and fall off more leaves, but the main reason was that the xylem have similar spongy material can storage more ivory liquid; 2) compared to T3 treatment, T4 treatment saved irrigation water by 21.6%, mean significantly increased the cortex thickness by 24%. Meanwhile, T4 significantly increased WSC<inf>leaf</inf>, WSC<inf>petiole</inf>, WSC<inf>master rod</inf>, WSC<inf>canopy</inf> and WSC<inf>whole plant</inf> by 28.3%, 28.8%, 13.7%, 17% and 12.3%, respectively. However, T4 treatment significantly reduced the evapo-transpiration quantity and transpiration by 36.8% and 20.4%, respectively, but increased mean the root mass and total dry mass by 21.3% and 1.3%, respectively, thus significantly increased total water use efficiency by 30.2%. Therefore, T4 treatment realized the optimal allocation of water supply by constantly alternate watering quota for 10 mm and 30mm, could increase water use efficiency and water storage capability of Jatropha curcas L. by increased root and total dry mass, and significantly reduced transpiration and evapo-transpiration.
Number of references:25
Main heading:Irrigation
Controlled terms:Drought - Efficiency - Evaporation - Experiments - Growth (materials) - Plants (botany) - Transpiration - Water supply
Uncontrolled terms:Alternated different amount modes - Drought stress - Dry mass - Growth regulation - Irrigation cycles - Irrigation waters - Jatropha curcas - Jatropha curcas l - Optimal allocation - Pot experiment  - Regulation - Root mass - T4 treatment - Water storage - Water use - Water use efficiency - Whole plants
Classification code:913.1 Production Engineering - 901.3 Engineering Research - 821.3 Agricultural Methods - 802.3 Chemical Operations - 461.9 Biology - 446.1 Water Supply Systems - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.18.018
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 27>

Accession number:20124415631089
Title:Productivity and water use in sunflower intercropped with potato
Authors:Dong, Wanlin (1); Zhang, Lizhen (1); Yu, Yang (1); Gou, Fang (1); Zhao, Peiyi (3); Tuo, Debao (3); Pan, Xuebiao (1)
Author affiliation:(1) Agricultural Meteorology Department, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (2) Scientific and Observing Experimental Station of Agri-Environment, Ministry of Agriculture, Beijing 100193, China; (3) Institute of Plant Nutrition and Analysis, Inner-Mongolia Academy of Agricultural Sciences, Hohhot 010031, China
Corresponding author:Zhang, L.(zhanglizhen@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:18
Issue date:September 15, 2012
Publication year:2012
Pages:127-133
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, we analyzed water uptake and water use of plant under different intercroppings, probed the mechanism that intercropping can increase yield, propounded optimal intercropping model that suited for the local ecological environment, and provided some theoretical basis. Field experiments were carried out from 2009 to 2010 in Wuchuang, Inner Mongolia, and water uptake and water use under different potato/sunflower intercroppings was studied. Results showed that the two potato/sunflower intercrops had yield advantage. The land equivalent ratios (LER) of two rows potato and 2 rows sunflower (2P:2S) and four rows potato and four rows sunflower (4P:4S) intercropping systems ranged from 1.2 to 1.3. That for 4P:2S was highest (1.26), had a significant advantage in land productivity. The actual evapotranspiration (ET) of potato between intercropping and sole systems was not significantly different. The same results were existed for sunflower. Comparison with water use efficiency (WUE) of sole potato, although the WUE of intercropped potato in 2P:2S intercrop and 4P:4S intercrop decreased 81% and 66%, but the WUEs of intercropped sunflower in two intercrops were as the same as that of the monoculture, therefore, the WUEs of the intercropping systems at field level were increased. Water use equivalent ratios (WER) of two intercrops ranged from 1.2 to 1.3, especially, in 4P:4S intercropping system were 1.3, indicated that this intercropping system had highest advantage in water use. It is concluded that the potato/sunflower intercrops, especially for 4P:4S intercrop, improve the land productivity and water use efficiency, and could be applied in sustainable development in the region of rainfed agricutlure.
Number of references:27
Main heading:Plants (botany)
Controlled terms:Evapotranspiration - Productivity - Soils - Ternary systems - Water content - Water supply
Uncontrolled terms:Actual evapotranspiration - Ecological environments - Equivalent ratios - Field experiment - Field level - Inner Mongolia - Potato/sunflower intercropping - Rainfed - Theoretical basis - Water equivalent  - Water uptake - Water use - Water-use efficiency - Windbreak
Classification code:913.1 Production Engineering - 531.1 Metallurgy - 483.1 Soils and Soil Mechanics - 461.9 Biology - 446.1 Water Supply Systems - 444.1 Surface Water - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.18.019
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 28>

Accession number:20124415631090
Title:Vegetation soil water carrying capacity of artificial pasture in loess region in Northern Shaanxi, China
Authors:Wang, Yanping (1); Shao, Mingan (2)
Author affiliation:(1) College of Resources and Environment, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China; (3) Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling 712100, China
Corresponding author:Wang, Y.(ylwangyp@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:134-141
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Vegetation carrying capacity of soil water is the key of the ecological environmental construction and sustainable development in the Loess Plateau. Based on local monitoring data of rainfall, runoff, soil moisture dynamics and Biomass under condition of 4 different sites in loess region of Northern Shaanxi from 2008 to 2010, relationships between natural precipitation and soil water supply, soil water supply and biomass, biomass and soil water consumption were analysed and established in this paper, and Soil Water Carrying Capacity of alfalfa had been separately calculated by FAO method and water balance method. The results showed that: in alfalfa land replenishment of soil moisture in alfalfa land and biomass showed a linear relationship; biomass and soil moisture consumption was a quadratic function. By using FAO method, it could be estimated that the maximum alfalfa yield of soil moisture can bear was 3992.2 to 4173.7 kg/hm² in Northern Shaanxi's Loess Plateau; however, the biomass was estimated by water balance method was 2600 to 3500 kg/hm², it was 16.07% to 33.52% less than the result estimated with FAO method. With the same aspect and position, capacity reduced while slope was increasing. With the same aspect and position, capacity downhill was larger than that uphill. With the same slope and position, capacity in southern slope was smaller than that in northern slope.
Number of references:23
Main heading:Soil moisture
Controlled terms:Biomass - Dynamic analysis - Evaporation - Soil surveys - Vegetation - Water supply
Uncontrolled terms:Alfalfa - Environmental construction - Linear relationships - Loess Plateau - Loess region in Northern Shaanxi - Quadratic function - Soil moisture dynamics - Soil water - Water balance method
Classification code:422.2 Strength of Building Materials : Test Methods - 446.1 Water Supply Systems - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes
DOI:10.3969/j.issn.1002-6819.2012.18.020
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 29>

Accession number:20124415631110
Title:Effects of slightly acidic electrolyzed water and carboxymethyl chitosan preservative on flesh discoloration of peaches
Authors:Zhou, Ran (1); Xie, Jing (1); Gao, Qiyao (2); Chen, Qingyan (2)
Author affiliation:(1) College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; (2) Want Want China Holdings Limited, Shanghai 201103, China
Corresponding author:Zhou, R.(rzhou@shou.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:281-286
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to reduce flesh color changes in Nanhui peach (Prunus persica L. Batsch), which seriously affect their commercial value, carboxymethyl chitosan preservative and slightly acidic electrolyzed water were used to preserve Nanhui peaches. Changes in flesh color, and the quality characters related to flesh color were assayed periodically during storage at 2&deg;C. T<inf>2</inf>-MAP made by magnetic resonance imaging (MRI) was used to check the inner quality of peaches at the beginning and end of the storage time. The results showed that the L^* values, H^* values, C^* values of the control samples were 85%-91%, 85%-93% and 114%-122% higher than the two treated samples at the end of storage time, respectively (p&lt;0.05). Compared with the control group, both carboxymethyl chitosan preservative and slightly acidic electrolyzed water can suppress ethylene production, decrease cell membrane permeability and changes in T<inf>2</inf> relaxation constant, delay the increase in PPO activity and the accumulation of total phenolic compounds, thus decrease the peach flesh discoloration. Compared with slightly acidic electrolyzed water treatment, carboxymethyl chitosan preservative treatment was more effective in maintaining the quality of Nanhui peaches.
Number of references:26
Main heading:Chitosan
Controlled terms:Cell membranes - Cytology - Discoloration - Energy storage - Ethylene - Fruits - Magnetic resonance imaging - Phenols - Quality assurance
Uncontrolled terms:Acidic electrolyzed waters - Carboxymethyl chitosan - Cell membrane permeability - Color changes - Control groups - Control samples - Ethylene production - Nanhui peaches - Phenolic compounds - Preservative treatments  - Prunus persica - Relaxation constants - Storage time
Classification code:913.3 Quality Assurance and Control - 821.4 Agricultural Products - 804.1 Organic Compounds - 802.3 Chemical Operations - 746 Imaging Techniques - 702 Electric Batteries and Fuel Cells - 461.2 Biological Materials and Tissue Engineering
DOI:10.3969/j.issn.1002-6819.2012.18.040
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 30>

Accession number:20124415631085
Title:Risk assessment and spatial-temporal distribution characteristics of flood and drought disasters in Henan province
Authors:Zhang, Jingjing (1)
Author affiliation:(1) Department of Environment and Planning, Shangqiu Normal University, Shangqiu 476000, China
Corresponding author:Zhang, J.(hnzjj888@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:98-106
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to strengthen risk assessment and management of the agricultural flood and drought disaster, the flood and drought disaster in Henan province was evaluated in this study with the information diffusion model and risk rank division, and then flood and drought disaster possibilities at different levels, as well as the characteristics of temporal and spatial distribution were obtained. The results showed that the risk probability of floods and drought disaster of Henan province were all larger, and the risk probability, risk rank, disaster forming area was larger than that of flood. The risk probability of floods increased from northwest to southeast at spatial-temporal distribution. The higher risk of floods was in west and north of Henan province, and the lower risk of floods was in east and south of Henan province, especially in Huang Huai area. The drought risk was more serious in west and south than that in east and north of Henan province. The lower disk of drought was in Anyang, Xinxiang and Puyang city and higher disk of drought was in west and south of Henan province. The study provides a basis for promotion strategic position of grain core area and disaster prevention in Henan province.
Number of references:25
Main heading:Floods
Controlled terms:Disaster prevention - Drought - Probability distributions - Risk assessment
Uncontrolled terms:Core area - Flood and drought disaster - Henan Province - Information diffusion - Risk assessment and managements - Risk probabilities - Spatial-temporal distribution - Temporal and spatial distribution
Classification code:444 Water Resources - 914.1 Accidents and Accident Prevention - 922.1 Probability Theory
DOI:10.3969/j.issn.1002-6819.2012.18.015
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 31>

Accession number:20124415631094
Title:Intelligent diagnose system of diseases and insect pests in sweet corn based on mobile terminal with Android system
Authors:Yang, Linnan (1); Gao, Lutao (2); Lin, Ersheng (1); Peng, Lin (2); Li, Wenfeng (1)
Author affiliation:(1) College of Basic Science and Information Engineering, Yunnan Agricultural University, Kunming 650201, China; (2) University Key laboratory of Agricultural Information Technology in Yunnan, Kunming 650201, China
Corresponding author:Yang, L.(lny5400@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:163-168
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To provide cheap, convenient and effective general peasants services of agricultural intelligent diagnosis system, a new design approach of intelligent system was proposed in this paper based on Android mobile terminal for diagnosing the agricultural pest insects and disease. A universal database and programming environment which was easy to do secondary development and rich in human-computer interaction technologies was constructed. Production-rules and forward reasoning method were applied to figure out the tree diagrams and inference engine for sweet corn pest insects and diseases. The research of system developing was focused on based on Android mobile terminal to realize the intelligent diagnosing on sweet corn pest insects and diseases. The developing approach of this new system was general-purposed. The test and application results of this system showed that this system was benefit for the agricultural production in practice with excellent features as portable, friendly interface and unlimited with networks.
Number of references:21
Main heading:Diagnosis
Controlled terms:Agriculture - Computer terminals - Diseases - Intelligent systems - Mobile phones - Robots
Uncontrolled terms:Agricultural pests - Agricultural productions - Android system - Diagnose system - Forward reasoning - Insect pest - Insects pest - Intelligent diagnosis system - Mobile terminal - New design  - Programming environment - Secondary development - Sweet corns - Tree diagram - Universal database
Classification code:461.6 Medicine and Pharmacology - 718.1 Telephone Systems and Equipment - 722.2 Computer Peripheral Equipment - 723.4 Artificial Intelligence - 731.5 Robotics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2012.18.024
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 32>

Accession number:20124415631107
Title:Nondestructive determination of pH value in beef using visible/near-infrared spectroscopy and genetic algorithm
Authors:Ma, Shibang (1); Tang, Xiuying (1); Xu, Yang (1); Peng, Yankun (1); Tian, Xiaoyu (1); Fu, Xing (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) Nanyang Institute of Technology, Nanyang 473004, China
Corresponding author:Xu, Y.(xuyang@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:18
Issue date:September 15, 2012
Publication year:2012
Pages:263-268
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to realize nondestructive and rapid determination of beef pH stored at 4&deg;C during its whole shelf-life, a laboratory visible/near-infrared spectroscopy system using visible/near-infrared spectroscopy and genetic algorithm was built to collect 120 beef samples' reflectance spectra in the 400-1700 nm. These samples were stored at 4&deg;C for 1-18days. The reflectance spectra of samples were performed with different pretreatments, such as multiplicative scatter correction (MSC), Savitzky-Golay (SG) smoothing method. The prediction model of multiple linear regression (MLR), partial least squares regression (PLSR) and least square-support vector machine (LS-SVM) were constructed for prediction of pH value in beef with full-spectrum and effective wavelengths selected by genetic algorithm (GA), respectively. The results showed that the MSC combined with SG smoothing was the best pretreatment, and the performance of models established with effective wavelengths selected by GA were better than the full-spectrum models, and the best performance was achieved by LS-SVM model, its correlation coefficient and standard deviation were 0.935 and 0.111, respectively. The prediction accuracy was improved. This study demonstrated that the LS-SVM model built by using visible/near-infrared spectroscopy with GA could nondestructively and rapidly determine pH value in beef during its whole shelf-life. This research provides a basis of further developing device for nondestructive and rapid determine pH value in beef.
Number of references:20
Main heading:Meats
Controlled terms:Beef - Genetic algorithms - Infrared spectroscopy - Linear regression - Near infrared spectroscopy - Nondestructive examination - pH - Reflection - Support vector machines
Uncontrolled terms:Correlation coefficient - Effective wavelength - Full-spectrum - Multiple linear regressions - Multiplicative scatter correction - Non destructive - Nondestructive determination - Partial least-squares regression - pH value - Pre-Treatment  - Pre-treatments - Prediction accuracy - Prediction model - Rapid determination - Reflectance spectrum - Savitzky-Golay - Shelf life - Smoothing methods - Standard deviation - Vector machines  - Visible spectra - Visible/near-infrared spectroscopies
Classification code:822.3 Food Products - 801.1 Chemistry, General - 801 Chemistry - 922.2 Mathematical Statistics - 741.1 Light/Optics - 711 Electromagnetic Waves - 421 Strength of Building Materials; Mechanical Properties - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2012.18.037
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 33>

Accession number:20124415631091
Title:Effects of wind and water double erosion on characteristics of runoff and sediment from slope lands
Authors:Tuo, Dengfeng (1); Xu, Mingxiang (2); Zheng, Shiqing (3); Li, Qiang (3); Pei, Huimin (1)
Author affiliation:(1) College of Forestry, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Institute of Soil and Water Conservation, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China
Corresponding author:Xu, M.(xumx@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:18
Issue date:September 15, 2012
Publication year:2012
Pages:142-148
Language: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 interaction of wind and water double erosion in the crisscross region of wind-water erosion on the Loess Plateau, the experiment of wind tunnel combined with simulated rainfall was conducted, and the effects of wind-water erosion on the characteristics of infiltration, runoff and sediment on slope were analyzed. The results showed the runoff producing time under water erosion was increased by moderate wind erosion intensity treatment with a wind speed of 14 m/s compared with no wind erosion. However, light wind erosion intensity treatment with a wind speed of 11 m/s hardly affected slope runoff producing time (P&gt;0.05). Compared with no wind erosion, wind erosion intensity treatment could reduce rainfall infiltration rate by 2.9%-10.0%, increase slope runoff intensity and erosion rate by 4.5%-21.7% and 7.3%-39.0% respectively. Rainfall infiltration rate, slope runoff intensity and erosion rate had no significant difference between two wind speeds (P&gt;0.05), but these factors reduced with the increment of rainfall intensity. Slope roughness increased obviously under wind and water double erosion. Under the wind speed at 14 m/s and rainfall intensity at 100 mm/h, slope roughness was 3 times higher than that under wind speed of 11 m/s and rainfall intensity 60 mm/h. The study provides theoretical foundation for evaluating the effect of wind and water double erosion.
Number of references:30
Main heading:Erosion
Controlled terms:Infiltration - Rain - Runoff - Sedimentology - Wind effects
Uncontrolled terms:Erosion rates - Light wind - Loess Plateau - Rainfall infiltration - Rainfall intensity - Simulated experiments - Simulated rainfall - Slope runoff - Theoretical foundations - Under water  - Wind erosions - Wind speed
Classification code:483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 481.1 Geology - 444.1 Surface Water - 443.3 Precipitation - 443.1 Atmospheric Properties - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2012.18.021
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 34>

Accession number:20124415631111
Title:Extraction and characterization of protein from cold pressed and traditional pressed degreased walnut dregs
Authors:Guo, Xingfeng (1); Chen, Jiluan (2); Lin, Yan (1); Qin, Zihan (1); Liao, Xiaojun (1); Hu, Xiaosong (1); Wu, Jihong (1)
Author affiliation:(1) Key Laboratory of Fruits and Vegetables Processing, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (2) College of Food Science and Engineering, Shihezi University, Shihezi 832000, China
Corresponding author:Wu, J.(wjhcau@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:18
Issue date:September 15, 2012
Publication year:2012
Pages:287-292
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:To optimize the extraction conditions of protein from the degreased walnut dregs, and make rational use of protein of cold pressed walnut dregs and traditional pressed walnut dregs, the single factor and the orthogonal experiment were used in the present study, also the characteristics of proteins extracted from traditional pressed walnut dregs and cold pressed walnut dregs were also investigated. The results show that the optimum extraction conditions were: SLR 1:8, temperature 60&deg;C, pH 9.0, time 60 min and the extraction yield was 78.13% under these conditions. The functional properties results of proteins extracted from cold pressed walnut dregs and traditional pressed walnut dregs revealed that both of them were highly soluble in the range of pH, water absorbency, oil absorbency were up to (5.60&plusmn;0.30) g/g for CPWP, (4.27&plusmn;0.16) g/g for TPWP and (5.70&plusmn;0.28) g/g for CPWP, (6.59&plusmn;0.21) g/g for TPWP, respectively. In addition, both of CPWP and TPWP were good digestive properties in vitro without significant difference.
Number of references:18
Main heading:Proteins
Controlled terms:Agricultural engineering - Agriculture - Extraction - Processing
Uncontrolled terms:Degreased walnut dregs - Extraction conditions - Extraction yield - Functional properties - In-vitro - Orthogonal experiment - Water absorbency
Classification code:802.3 Chemical Operations - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.4 Manufacturing
DOI:10.3969/j.issn.1002-6819.2012.18.041
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 35>

Accession number:20124415631072
Title:Development of semi-automatic control system for new shootings cuttage propagation facilities of blueberry
Authors:Zhang, Daohui (1); Wang, Jiawei (1); Zong, Xiaojuan (1); Wei, Hairong (1); Xu, Li (1); Liu, Qingzhong (1)
Author affiliation:(1) Key Laboratory for Fruit Biotechnology Breeding of Shandong, Shandong Institute of Pomology, Tai'an 271000, China
Corresponding author:Liu, Q.(QZLIU@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:8-15
Language: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 overcome the difficulties in blueberry rapid propagation, a semi-control system was designed. This system used the natural cold ground water to regulate the environment factors accurately, including temperature, humidity and light intensity in hot weather. The results indicated that the temperature, relative humidity and the light intensity in the system was controlled in 20-35&deg;C, 80%-100% and 0-16.50 klx, respectively, and their control error was less than 0.15&deg;C, 0.2% and 0.165klx, respectively. Compared to the traditional open field cottage, the period for new shootings rooting was shortened from 90 to 25 days, the rooting rate increased from 15% to 97%, the total seedling period was reduced from 9 to 3 months with this system, and rooting system of new shootings was improved greatly with this system. Compared to the culture propagation, the average cost of seedling was decreased by 90%. Compared with the traditional seedling hothouses and facilities with double plastic film, double sunshade net and spraying systems, cost of investment and labor were decreased significantly, the automation level was improved, and the ambient temperature of seedling was controlled below 35&deg;C.
Number of references:31
Main heading:Automation
Controlled terms:Applications - Control - Cutting - Facilities - Groundwater
Uncontrolled terms:Automation levels - Average cost - Blueberry - Cold ground water - Control errors - Cost of investment - Environment factors - Hot weather - Light intensity - Seedling  - Semi-automatic control - Spraying system
Classification code:402 Buildings and Towers - 444.2 Groundwater - 451.2 Air Pollution Control - 604.1 Metal Cutting - 731 Automatic Control Principles and Applications - 732 Control Devices
DOI:10.3969/j.issn.1002-6819.2012.18.002
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 36>

Accession number:20124415631095
Title:Influence and investigation of locust's phototactic response enhanced by coupling between light and vibration
Authors:Liu, Qihang (1); Wu, Di (2); Zhou, Qiang (3)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Hebei University of Engineering, Handan 056038, China; (2) College of Information and Electronic Engineering, Hebei University of Engineering, Handan 056038, China; (3) Engineering College of China Agricultural University, Beijing 100083, China
Corresponding author:Zhou, Q.(zq@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:18
Issue date:September 15, 2012
Publication year:2012
Pages:169-176
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on locust's phototactic mechanism and locust's shocking characteristic stimulated by vibratory stimulation, the comparative test of locust's phototactic response to light-vibration coupling and spectral illumination was carried out by utilizing LED light source, vibration stimulation device and locust's behavioral experiment equipment. The results showed that spectral illumination and vibration stimulation coupling effects on locusts had the push-pull stimulation effect, vibration stimulation enhanced the increasing phototactic effects of locusts, and increased locust's phototactic response, while spectral light determined locust's phototactic induction effect. Spectral light and vibration stimulating locust's different sensory receptors initiated the distinction of locust's neural processing and sensitive response, causing that the cycle vibration mode(vibration frequency was 50 Hz, vibration time was 400 ms and vibration intermittent stop time was 1s) and higher vibration intensity and the enhancing effects of locust's phototactic response intensity was better in the cycle vibration mode coupled with violet light. Light-vibration stimulating locust could lead to the physiological effect, and the initial stimulation effect generating the physiological effect of locust was the stronger with the stronger energy of light and vibration. The difference of locust's sensitive response point to light and vibration, the attenuation properties of light and vibration transmission, locust's sensitive selective tuning would influence the increasing degree of locust's phototactic effects stimulated by light-vibration coupling. So through combining the strength threshold of vibration scaring locust's response with the optimal regulative mode of vibration stimulating locusts can realize vibration stimulating with moving and approaching step by step in scope of locust's response to spectral illumination and locust's phototactic effect could be enhanced effectively. These results could provide the technical support for the implementation of photoelectric induction equipment of locust.
Number of references:29
Main heading:Physiology
Controlled terms:Couplings - Light emitting diodes - Light sources - Light transmission
Uncontrolled terms:Attenuation properties - Behavioral experiment - Comparative tests - Coupling effect - Enhancing effect - Induction equipments - LED light source - Locusts - Neural-processing - Phototaxis response  - Physiological effects - Response intensity - Selective tuning - Technical support - Vibration frequency - Vibration intensity - Vibration modes - Vibration stimulation - Vibration transmission - Vibrations
Classification code:461.9 Biology - 602 Mechanical Drives and Transmissions - 741.1 Light/Optics
DOI:10.3969/j.issn.1002-6819.2012.18.025
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 37>

Accession number:20124415631093
Title:Development and application of citrus LAI using infrared transmittance technique
Authors:Wu, Weibin (1); Hong, Tiansheng (1); Zhang, Lijun (3); Li, Yuecheng (3); Zheng, Xihe (3); Shi, Jianzhu (3); Huo, Qing (3)
Author affiliation:(1) Key Laboratory of Key Technology for South Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China; (2) Mechanical Laboratory of China Agriculture Research System, Guangzhou 510642, China; (3) College of Engineering, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Hong, T.(tshong@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:18
Issue date:September 15, 2012
Publication year:2012
Pages:155-162
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To solve the shortcomings of indirect LAI measurement methods which seldom considered the factors of single isolated canopy, leaves overlapping each other and the image processing speed slowly, the intermittent model avoiding leaves overlapping was established based on the main influential factor of single isolated citrus fruiter LAI'S measuring system (&alpha;&lt;0.05) by orthogonal experiment . Then automatic acquisition possible was realized by adopting three dimensional walking mechanisms, and an automatic measuring system of citrus LAI was developed based on infrared transmission using the LabVIEW platform. The hardware system was composed of control module, running gear, signal conditioning model, data acquisition card and PC, of which the demarcated average absolute relative error was 11.11%. With the running gear scan, locate and collect automatically in S shape, 45 citrus trees in the citrus garden of the College of Engineering of South China Agricultural University were tested. With the LAI value computed from direct method and sampling method as true values, the average absolute relative error was 31.4%. Compared with true values, average absolute relative error of the measured value from plant canopy analysis's professional version was 29.8%. Since the errors of the two systems were similar, the system proposed could meet the requirement of LAI test.
Number of references:31
Main heading:Plants (botany)
Controlled terms:Automatic testing - Image processing - Infrared transmission - Measurements - Models
Uncontrolled terms:Automatic acquisition - Automatic measuring system - Citrus - Citrus tree - Control module - Data acquisition cards - Direct method - Hardware system - Influential factors - Infrared transmittance  - LabViEW - Leaf Area Index - Measurement methods - Measuring systems - Orthogonal experiment - Overlapped leaves with distant gap - Plant canopies - Relative errors - Running gear - S shape  - Sampling method - South China - Walking mechanism
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 902.1 Engineering Graphics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 741.1 Light/Optics - 461.9 Biology - 423 Non Mechanical Properties and Tests of Building Materials - 422 Strength of Building Materials; Test Equipment and Methods - 741 Light, Optics and Optical Devices
DOI:10.3969/j.issn.1002-6819.2012.18.023
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 38>

Accession number:20124415631071
Title:Quantitative analysis on technological characteristics of different conservation tillage patterns in major agricultural regions of China
Authors:Chen, Yuanquan (1); Sui, Peng (1); Gao, Wangsheng (1); Li, Yuanyuan (1)
Author affiliation:(1) Circular Agriculture Research Center, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
Corresponding author:Gao, W.(wshgao@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:18
Issue date:September 15, 2012
Publication year:2012
Pages:1-7
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on the basic principles of "Three-Min and Two-High"(minimum soil disturbance, minimum land-surface bareness, minimum field pollution, high resource conservation and high economic efficiency), an indicator system was developed for quantitatively analyzing the characteristics of conservation tillage (CT), and 28 patterns of CT in five regions (Northeast and North of China, Loess Plateau, Farming-Pastoral Transitional Zone and Yangtze River Basin), covering 10 provinces in China were studied in this article. The result shows that: the key patterns of CT in China have a high degree of conservation. The values of comprehensive "conservation degree"(Cd) of 27 patterns out of 28 patterns are higher than 10.0. Compared with traditional tillage patterns, most of the CT patterns increase the land cover degree, reduce the soil disturbance, improve soil water, soil nutrition and prevent soil loss, and add the economic benefits as well, but have weak performance in "minimum field pollution"; CT in five regions has different characteristics. CT in Northeast China shows high benefits in improving soil water, soil nutrition and soil preservation and reducing soil disturbance, but increases the application rate of chemical fertilizer and pesticides. In Loess Plateau, the CT indicates higher land cover degree, but lower economic benefits. Higher land cover and higher economic benefit were observed in Farming-Pastoral Transitional Zone. In Yangtze River Basin, CT has higher economic benefit but consumes more labor force. Part of the conservation tillage in North China Plain increases soil water and nutrition, but there are no significantly effects on reducing soil disturbance or increasing economic benefits; based on the evaluation results, the model and technology of CT suited for different regions should be further improved in order to build a Chinese characteristic conservation tillage system.
Number of references:19
Main heading:Geologic models
Controlled terms:Agriculture - Chemical analysis - Fertilizers - Geographical regions - Landforms - Natural resources - Nutrition - Pollution - River pollution - Soil conservation  - Soil moisture - Soils - Water content - Watersheds
Uncontrolled terms:Application rates - Basic principles - Chemical fertilizers - Chinese characteristics - Conservation tillage - Conservation tillage systems - Economic benefits - Economic efficiency - Evaluation indicators - Evaluation results  - Indicator system - Key Patterns - Labor force - Land cover - Loess Plateau - North China Plain - Northeast China - Resource conservation - Soil disturbances - Soil loss  - Soil nutrition - Soil water - Technologic characteristics - Yangtze River basin
Classification code:901.4 Impact of Technology on Society - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 801 Chemistry - 483.1 Soils and Soil Mechanics - 481.1 Geology - 461.7 Health Care - 454.2 Environmental Impact and Protection - 453 Water Pollution - 444.1 Surface Water - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.18.001
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 39>

Accession number:20124415631106
Title:Experiment and analysis of mechanical properties of mechanical crushing brown rice
Authors:Zhou, Xianqing (1); Zhang, Yurong (1); Chu, Hongqiang (1); Liu, Ying (1)
Author affiliation:(1) School of Food Science and Technology, Henan University of Technology, Zhengzhou 450052, China
Corresponding author:Zhang, Y.(zyurong@haut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:255-262
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to investigate the mechanical breaking properties of brown rices and their relationships with its kernel structure, texture analyzer tests were used to determine and analyze the stabbing forces, three-point bending, anti-shearing and compressing forces of brown rices. Breaking properties (three-point bending) of brown rices and milled rices were compared. The results showed that the occurrence of crush was due to the uneven of the endosperm and in the external force, the internal cracks were formed firstly, and stress concentration at the crack tip promoted further crack propagation, which led to grain fracture eventually. Stabbing breaking force of different samples with thickness of (1.0&plusmn;0.5) mm were about 10 N, and the binding force of different samples were closed, and the crush in the grain processing was related with thickness and endosperm properties of the grain. Three point bending force better reflected the broken properties of grain in the process of milling. Under the protect of bran layer, the mechanical properties of brown rices were better than the milled rices. The results provide a base for the determination of the brown rice processing and storage technique.
Number of references:23
Main heading:Grain (agricultural product)
Controlled terms:Bending tests - Crack tips - Mechanical properties - Stress concentration - Textures
Uncontrolled terms:Binding forces - Breaking force - Broken property - Brown rice - Experiment and analysis - External force - Grain fracture - Grain processing - Internal crack - Kernel structure  - Mechanical crushing - Storage technique - Texture analyzers - Three point bending
Classification code:421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 821.4 Agricultural Products - 933 Solid State Physics - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2012.18.036
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 40>

Accession number:20124415631074
Title:Optimization of parameters for soybean lifter based on dynamic simulation of virtual prototype
Authors:Chen, Haitao (1); Dun, Guoqiang (1)
Author affiliation:(1) Engineering College, Northeast Agriculture University, Harbin 150030, China
Corresponding author:Chen, H.(htchen@neau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:23-29
Language: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 unreasonable parameters about structure and operation of soybean-lifter making the loss of header increased, based on measured the plant properties and the mechanical properties of soybean stalk, the soybean plant model and lifter were established by CAD-software Solidworks and the virtual dynamic prototype was established by using the dynamic simulation software-ADAMS. The motion of soybean stalk's lifting process was simulated in ADAMS/View. Virtual orthogonal test of the two factors with three levels was employed to study the optimization of structural and operation parameters which affected lifter properties. The travel speed and the lifter angle were selected as factors, and the impact-force of x(direction of operation), y(vertical upward), z(horizontal to left direction) axis between soybean plant and lifter was selected as response function to represent the performance of lifting and the loss of header by using software Design-Expert 6.0.10. And virtual optimization results were verified by field test. The results indicated that the impact-force of x, y, z axis was 52.31, 73.52 and 95.87 N respectively when the working velocity was 0.9 m/s and the lifter angle was 22&deg; in the virtual tests and the performance of lifting was the best and the loss rate of header was 1.19%. The paper provides theory references for designing the soybean lifter.
Number of references:31
Main heading:Oilseeds
Controlled terms:Agricultural machinery - Computer aided design - Computer simulation - Mechanical properties - Optimization - Structural optimization - Velocity
Uncontrolled terms:Design-expert - Field test - Impact - Lifter - Lifting process - Loss rates - Operation parameters - Optimization of parameters - Orthogonal test - Plant properties  - Response functions - SolidWorks - Soybean - Soybean plants - Travel speed - Virtual dynamics - Virtual prototype - Virtual technology - Virtual tests
Classification code:723.5 Computer Applications - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products - 921.5 Optimization Techniques - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2012.18.004
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 41>

Accession number:20124415631075
Title:Rheologic behavior of chopped corn stalks during rotary compression
Authors:Li, Ruxin (1); Geng, Aijun (1); Zhao, He (1); Bao, Wei (1); Fan, Xiuwen (1)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai'an 271018, China
Corresponding author:Li, R.(rxli@sdau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:18
Issue date:September 15, 2012
Publication year:2012
Pages:30-35
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to provide basic date for design and technology for round trapped baler, it is needed to understand the rheologic laws of chopped corn stalks in the course of rotary compression. A test bed was developed for analyzing the principle of rotary compression and forming. Rotary compression the chopped corn stalks, and the rotary compression test and stress relaxation experiments of chopped corn stalks were studied. The rheological characteristics of chopped corn stalks in rotary compression process was investigated. Using linear viscoelastic theory, the Burges Model was constructed. Fitting the stress relaxation curve through residual method, the stress relaxation model and its parameters were got, and the coefficient of determination was calculated. Burges Model's viscous-elastic parameters was solved using relevant formula, and E<inf>1</inf> was 18.33 kPa, k<inf>1</inf> was 994.81 kPa, E<inf>2</inf> was 27.64 kPa, k<inf>2</inf> was 2342.49 kPa. The viscosity coefficient was far greater than the elastic modulus, so the rheologic laws of chopped corn stalks tend to fluid. The study provide a reference for the further study on the technology of chopped corn stalks' rotary compression, and the optimization design of techniques and equipment.
Number of references:25
Main heading:Rheology
Controlled terms:Compression testing - Curricula - Elasticity - Equipment testing - Rotary engines - Stress relaxation
Uncontrolled terms:Coefficient of determination - Compression process - Compression tests - Corn stalk - Design and technology - Linear viscoelastic theory - Optimization design - Residual method - Rheological characteristics - Stress-relaxation curves  - Viscosity coefficient
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 931.1 Mechanics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 931 Classical Physics; Quantum Theory; Relativity - 612.1 Internal Combustion Engines, General - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 901.2 Education
DOI:10.3969/j.issn.1002-6819.2012.18.005
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.