2011年10月第27卷第10期

2011年10月第27卷第10期

Accession number:20114614514880
Title:Relationship between rice components, stress-relaxation and instant rice noodles quality
Authors:Meng, Yuecheng (1); Liu, Xin (1); Chen, Jie (1)
Author affiliation:(1) College of Food and Biological Engineering, Zhejiang Gongshang University, Hangzhou 310035, China
Corresponding author:Meng, Y.(mengyc@zjgsu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:375-382
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To simulate the viscoelastic mechanical behaviors of stress-relaxation of rice gel were investigated by studying the correlation of properties of the products, components of raw materials and stress-relaxation parameters, and exploring the effect of components of rice on products of stress-relaxation parameters. Instant rice noodles were prepared of four rice varieties. The results showed that the maximum shear stress, the average shear stress, tensile strength, tensile strain, rehydration and cooking loss of boiling were 0.103-0.184 N/mm2, 0.047-0.066 N/mm2, 0.078-0.157 N/mm2, 53.14%-80.84%, 98.80%-153.26%, 12.09%-24.39%, respectively. Rice with higher protein content and lower fat content revealed higher average shear stress and hardness, lower elasticity and viscosity and lower E<inf>1</inf> and η<inf>1</inf> (E<inf>1</inf> and η<inf>1</inf> were the first spring model and dashpot model in extrusion gelatin); higher amylase content resulted in lower percentage of rehydration and cooking loss of boiling, longer relaxation time τ<inf>1</inf>, and shorter relaxation time τ<inf>2</inf>, which were key factors in the quality control and evaluation of instant rice noodles. Equations have been interpreted on the basis of relations properties of rice and stress-relaxation parameters. It is not only provide a significant guiding for raw material selection of instant rice noodles, but also explanation quality change mechanism from viscoelastic behaviors of stress-relaxation of rice gel, and provide additional information on the development of starch food.
Number of references:36
Main heading:Stress relaxation
Controlled terms:Correlation methods - Elasticity - Gels - Materials properties - Phase transitions - Quality control - Shear strength - Shear stress - Tensile strain - Tensile strength
Uncontrolled terms:Components - Dashpots - Fat contents - Instant rice noodles - Key factors - Maximum shear stress - Mechanical behavior - Properties - Protein contents - Quality change - Raw material selection - Spring model - Viscoelastic behaviors
Classification code:421 Strength of Building Materials; Mechanical Properties - 801.4 Physical Chemistry - 804 Chemical Products Generally - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2011.10.066
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514848
Title:Gully status and relationship with landscape pattern in black soil area of Northeast China
Authors:Wang, Wenjuan (1); Zhang, Shuwen (2); Deng, Rongxin (3)
Author affiliation:(1) Department of Resources and Environmental Sciences, Henan University of Economics and Law, Zhengzhou 450002, China; (2) Northeast Institute of Geography and Agroecology, Chinese Acad. of Sci., Changchun 130012, China; (3) Institute of Resources and Environment, North China Institute of Water Resources and Electric Power, Zhengzhou 450011, China
Corresponding author:Wang, W.(wangwenjuan@neigae.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:192-198
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 regulation of land use structure, improvement on quantity proportion of landscape constituent and optimization of the landscape patch spatial distribution are the important measures to control erosion. Taking Kedong county in typical black soil area of Northeast China as study area, using SPOT5 image as basic data source, gully distribution status and landscape pattern were obtained for the study area. Based on hydrology analysis module, 55 subbasins were extracted as basic analysis units, then gully density and landscape pattern metrics in each subbasin were gotten using GIS spatial function and FRAGSTAT software, respectively. By correlation analysis, the relationship between gully erosion and landscape pattern was analyzed. The results showed that the number of gully is 2 246. The shortest and longest gully was 19.7 m and 12499.43 m, respectively. Gully density is 479.15 m/km2. The erosion area of cultivated land was 1734.05 hm2 and the area of destroyed cultivated land was 8067.5 hm2. The study area is a typical matrix-patch-corridor agriculture landscape and the high factitious dry land is the main reason to cause erosion. Single-factor correlation analysis between gully density and percentage of landscape (PLAND) of dry land, forest, Perimeter-Area Fractal Dimension (PAFRAC), Contagion Index (CONTAG), and Shannon's Diversity Index (SHDI) showed that regulating the percents in dry land, grass and forest and optimizing the landscape configuration reasonably were very important for the soil erosion control and management. Multi-factor correlation analysis between gully density and landscape metrics showed that the difference of landscape pattern in subbasin was not the key reason that caused the difference of gully erosion, and therefore, research on gully formation need to integrate natural and human activities factors for further study. The research can provide suggestion for land use planning and soil erosion control in agriculture landscape.
Number of references:30
Main heading:Soils
Controlled terms:Agriculture - Erosion - Fractal dimension - Geographic information systems - Land use - Optimization - Soil mechanics
Uncontrolled terms:Black soil - Contagion index - Correlation analysis - Cultivated lands - Data source - Diversity index - Dry land - Geographic information - Gully density - Gully erosion - Human activities - Land Use Planning - Landscape configuration - Landscape metrics - Landscape pattern - Multi-factor - Northeast China - Soil erosion - Spatial functions - Study areas - Subbasins
Classification code:921 Mathematics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723.3 Database Systems - 921.5 Optimization Techniques - 483.1 Soils and Soil Mechanics - 407 Maritime and Port Structures; Rivers and Other Waterways - 403 Urban and Regional Planning and Development - 483 Soil Mechanics and Foundations
DOI:10.3969/j.issn.1002-6819.2011.10.034
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514846
Title:Changes of nitrogen concentration for surface and groundwater in flooding paddy field under controlled drainage
Authors:Xiao, Menghua (1); Yu, Shuang'en (1); Zhang, Yunlong (1)
Author affiliation:(1) Efficient Irrigation and Drainage and Environ. of Agriculture Water and Soil of South Area Key Lab., Hehai University, Nanjing 210098, China; (2) College of Agricultural Engineering, Hehai University, Nanjing 210098, China
Corresponding author:Yu, S.(seyu@hhu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:180-186
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To reduce agricultural non-point source pollution and improve nitrogen use efficiency, the research on the changes of concentrations of NH<inf>4</inf> -N and NO<inf>3</inf>--N in surface and ground water after fertilizer application and changes of that at each growth stage was conducted based on experimental test in flooding paddy field under different leakage rates by use of lysimeter. Results showed that after fertilizer application, the concentrations of NH<inf>4</inf> -N in both surface and ground water increased significantly and then decreased, and their peak values both appeared at the 5th day after fertilizer application, they were 17.75 and 10.34 mg/L, respectively in surface water and ground water. Results also showed that the concentration of NO<inf>3</inf>--N in surface water decreased after a brief increment, and its peak value appeared at the 2nd day after fertilizer application. While the concentration of NO<inf>3</inf>--N in ground water gradually rose and then decreased, its peak value appeared at the 5th day after fertilizer application (3.25 mg/L). Compared with the value at the 1st day, the concentrations of NO<inf>3</inf>--N in ground water increased to 249.4% at 6th day. Water was supplied in the paddy and soil in paddy was disturbed and the process that absorption of NH<inf>4</inf> -N in the surface soil and nitrification process were promoted. Then the concentrations of NH<inf>4</inf> -N and NO<inf>3</inf>--N in surface water was increased and concentrations of that gradually decreased with the flooding time increasing. Different leakage (2 and 4 mm/d) had a certain influence on the changes of nitrogen, but the difference between each treatment was not significant. Therefore, drainage should be avoided after fertilizing, immediate drainage should be avoided after rain and surface irrigation.
Number of references:17
Main heading:Nitrogen fertilizers
Controlled terms:Concentration (process) - Groundwater - Groundwater pollution - Nitrification - Nitrogen - Surface waters - Water absorption
Uncontrolled terms:Controlled drainage - Experimental test - Fertilizer applications - Growth stages - Leakage rates - NH<inf>4</inf> -N concentration - Nitrification process - Nitrogen concentrations - Nitrogen-use efficiency - Non-point source pollution - Paddy fields - Peak values - Surface irrigation - Surface soil
Classification code:444.1 Surface Water - 444.2 Groundwater - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2011.10.032
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514817
Title:Design and experiment of spoon-shape maize precision seedmeter
Authors:Sun, Wei (1); Wu, Jianmin (1); Huang, Xiaopeng (1); Li, Hui (2)
Author affiliation:(1) College of Engineering, Gansu agricultural University, Lanzhou 730070, China; (2) Logistics Department Lanzhou City College, Lanzhou 730070, China
Corresponding author:Wu, J.(wujm@gsau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:17-21
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 the maize precision sowing, a new spoon shaped seedmeter was specially designed for punch planter. After the key data of the seedmeter was decided, and the analysis on its working principle and process was made in this paper, which led to the key factors and critical conditions that would affect the functions of the spoon shaped seedmeter. The orthogonal experiment was made which took the seed tube bending angle, seed height and velocity as factors and took single seed rate and cavity rate as index. The experimental data analysis showed that optimal parameters of spoon shaped seedmeter were 90 degrees seed tube bending angle, two-thirds radius of punch planter seed height, 0.86 meters per second velocity. The tests showed that the spoon shaped seedmeter was satisfied with the maize precision sowing.
Number of references:15
Main heading:Experiments
Controlled terms:Agricultural machinery - Data reduction - Machine design - Seed
Uncontrolled terms:Critical condition - Experimental data analysis - Key factors - Optimal parameter - Orthogonal experiment - Punch planter - Seed rate - Spoon shaped seedmeter - Tube bending - Working principles
Classification code:601 Mechanical Design - 723.2 Data Processing and Image Processing - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2011.10.003
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514852
Title:Field test building design for controlled aquaculture based on renewable energy heating system
Authors:Zheng, Rongjin (1); Sun, Wenjun (1); Zhang, Jiangao (2); Yin, Fan (1); Zhang, Anlai (3); Tao, Weiping (3); Fu, Lixia (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310027, China; (2) Zhejiang Zhongxin Energy Development Co. Ltd., Hangzhou 310020, China; (3) Jinhua Rural New Energy Technology Extention Station, Jinhua 321017, China
Corresponding author:Fu, L.(fulixia@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:218-221
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 controlled aquaculture systems, building is a key facility affecting the stability of indoor environment and energy consumption. A field test building was constructed for evaluating the performance of building envelopes and heating systems at the campus of Zhejiang University, China. The dimensions of the test building were 13.46 m×4.96 m. A total of eight independent units were designed for evaluating hygrothermal performance of envelope in the test building, four units for wall experiment with a dimension of 2.2 m×2.2 m, the other four for roof experiment with a dimension of 2.2 m×4.8 m. The area of solar collector for heating could be changed from 10 to 50 m2, and the indoor temperature of the building could be controlled between 15 to 35°C. This paper describes the field test facility which can be applied to tests of solar energy and/or heat pump, hygrothermal performance of building envelope, wastewater heat recovery, freshwater heating, and air heating.
Number of references:16
Main heading:Environmental testing
Controlled terms:Aquaculture - Energy resources - Energy utilization - Experiments - Heating - Heating equipment - Solar buildings - Solar energy - Waste heat - Wastewater
Uncontrolled terms:Air heating - Aquaculture systems - Building design - Building envelope - Field test - Heat pumps - Heating system - Hygrothermal performance - Indoor environment - Indoor temperature - Performance of buildings - Renewable energies - Zhejiang University
Classification code:821.3 Agricultural Methods - 643.1 Space Heating - 642.2 Industrial Furnaces and Components - 615.2 Solar Power - 901.3 Engineering Research - 525 Energy Management and Conversion - 454 Environmental Engineering - 452.3 Industrial Wastes - 402 Buildings and Towers - 454.2 Environmental Impact and Protection
DOI:10.3969/j.issn.1002-6819.2011.10.038
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514866
Title:Location choice for farmland consolidation based on constraints of ecology and non-agriculture land conversion
Authors:Ye, Qian (1); Chen, Jianglong (1); Xiao, Jun (3); Wei, Wenjia (1)
Author affiliation:(1) Nanjing Institute of Geography and Limnology, Chinese Acad. of Sci., Nanjing 210008, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) College of Economics and Management, Sichuan Agriculture University, Yaan 625014, China
Corresponding author:Chen, J.(jlchen@niglas.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:293-299
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:Farmland consolidation is very important for improving agricultural production condition and ensuring food security. Location choice for farmland consolidation is a complex system engineering. Based on the bid-rent model and ecological security theory, the paper developed an analytical framework and analyzed the effects of the potential of new arable land, eco-environment and farmland conversion on location choice for farmland consolidation, and constructed an index system of location choice for farmland consolidation. Taking Suyu district of Suqian city as a case, the paper identified the best location for farmland consolidation, using village as an evaluation unit with the help of GIS spatial analysis technique. The results indicate that the preferred locations are mainly located in the north of the flood plain of the Yellow River, the center of Alluvial plain of the Yi River and the Shu River. These regions are far away from the urban centers and the industrial areas and with less rivers and lakes, which belong to traditional agricultural areas in Suyu. The research can provide a reference for scientific and rational farm land consolidation.
Number of references:23
Main heading:Location
Controlled terms:Ecology - Farms - Food supply - Geographic information systems - Landforms - Rivers
Uncontrolled terms:Ecological security - Geographic information - Index systems - Location choice - Suyu district
Classification code:911 Cost and Value Engineering; Industrial Economics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723.3 Database Systems - 912 Industrial Engineering and Management - 481.1 Geology - 407.2 Waterways - 404.2 Civil Defense - 454.3 Ecology and Ecosystems
DOI:10.3969/j.issn.1002-6819.2011.10.052
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514847
Title:Change of sap flow rate and stem diameter microvariation of summer maize and influenct factors
Authors:Li, Hui (1); Liu, Yu (1); Cai, Jiabing (1); Mao, Xiaomin (2)
Author affiliation:(1) State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; (2) College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Liu, Y.(liuyu@iwhr.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:187-191
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 reveal the daily variation process of sap flow rate and stem diameter and its impact factors, field experiments were conducted to collect data of summer maize in middle growth period at Daxing Station, and then the relationship between daily variation process of sap flow rate and stem diameter, the relationship of sap flow rate and environmental factors, as well as the relationship of the microvariation of stem diameter with soil moisture were analyzed. Results showed that the curve of daily sap flow rate variation process was unimodal, and significantly affected by solar radiation, vapor pressure, wind speed and other meteorological factors. A linear regression equation was obtained through analysing the data of sap flow rate and meteorological factors, which may provide a basis for prediction of leaf transpiration of maize using meteorological data. Moreover, the daily change of stem diameter was significantly different in the daytime and at night, i.e. shrank in the daytime and recovered at night. The maximum of daily stem diameter decreased with decreasing soil moisture, forming a linear relationship between them. So crop water deficit conditions can be diagnosed by using the data of stem microvariation on the basis of this relationship.
Number of references:13
Main heading:Soil surveys
Controlled terms:Atmospheric movements - Flow rate - Meteorology - Moisture determination - Soil moisture - Solar radiation - Sun - Transpiration
Uncontrolled terms:Daily change - Environmental factors - Field experiment - Growth period - Impact factor - Leaf transpiration - Linear regression equation - Linear relationships - Meteorological data - Meteorological factors - Sap flow rate - Stem diameter - Summer maize - Unimodal - Water deficits - Wind speed
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 657.1 Solar Energy and Phenomena - 643 Space Heating, Ventilation and Air Conditioning - 944.2 Moisture Measurements - 631 Fluid Flow - 443.1 Atmospheric Properties - 443 Meteorology - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2011.10.033
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514831
Title:Comparison of quality evaluation methods for image fusion of farmland remote sensing
Authors:Chen, Chao (1); Qin, Qiming (1); Wang, Jinliang (1); Chi, Changyan (2); Jiang, Hongbo (1); Liu, Mingchao (1); Feng, Haixia (1)
Author affiliation:(1) Institute of Remote Sensing and Geographic Information System, Beijing 100871, China; (2) Peace Map Co. Ltd., Beijing 100037, China
Corresponding author:Qin, Q.(qmqinpku@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:95-100
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to compare fusion effects, evaluate fusion algorithms and optimize fusion process, three quantitative evaluation indexes were presented on the basis of analyzing quality evaluation methods of remote sensing image fusion: imagery brightness index, spatial information index, and spectral information index. Finally, optical remote sensing imagery fusion was taken for example. The applicability and effectiveness of four pixels level fusion algorithms were verified by means of simulation experiment. IHS transformation distorted the spectral characteristics of imagery, so the feature spectra was easily to become vestigial; Wavelet transformation had superiority on maintaining spectral characteristics, but the result easily became block and blurred; PCA transformation maintained most detail texture and architectural feature of source imagery, but it couldn't maintain detail spectral information. The research shows that, these three indexes can be taken as the evaluation criterion of remote sensing image fusion, they can also be used as good reference for many applications.
Number of references:20
Main heading:Image fusion
Controlled terms:Algorithms - Image reconstruction - Principal component analysis - Quality control - Remote sensing
Uncontrolled terms:Architectural features - Brightness index - Evaluation criteria - Fusion algorithms - Fusion process - IHS transformation - Level fusion - Optical remote-sensing imagery - Quality evaluation - Quality evaluation method - Quantitative evaluation - Remote sensing images - Simulation experiments - Spatial informations - Spectral characteristics - Spectral information - Wavelet transformations
Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 731.1 Control Systems - 913.3 Quality Assurance and Control - 921 Mathematics - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2011.10.017
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514871
Title:Determination of crop target yield based on cultivated land potential productivity evaluation
Authors:Zhang, Yueping (1); Zhang, Bingning (1); Wang, Changsong (2); Li, Wenxi (1); Gong, Xinxin (1); Jiang, Yi (1)
Author affiliation:(1) Yangzhou Station of Soil and Fertilizer, Yangzhou 225101, China; (2) Yizheng Station of Soil and Fertilizer, Yizheng 211400, China
Corresponding author:Zhang, Y.(yueping@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:328-333
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 prediction technology for crops target yield, a case study on rice target yield of Yizheng city in Jiangsu province was conducted by potential productivity index method at parcel scale, and field experiments were also conducted for verification by demonstrations and farmers investigation results. The results showed that cultivated land potential productivity index and target yield of rice were positive relationships with unit yield of rice, and coefficient correlation was 0.6144 and 0.5241 (124 samples), respectively. Potential productivity index can evaluate farmland potential productivity and then to determine crop target yield in the soil testing and formulated fertilization.
Number of references:18
Main heading:Productivity
Controlled terms:Crops - Land use - Soil testing
Uncontrolled terms:Coefficient correlations - Correlation analysis - Crop targets - Cultivated lands - Field experiment - Jiangsu province - Plantation - Potential productivity - Rice
Classification code:403 Urban and Regional Planning and Development - 483.1 Soils and Soil Mechanics - 821.4 Agricultural Products - 913.1 Production Engineering
DOI:10.3969/j.issn.1002-6819.2011.10.057
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514820
Title:Analysis on resistance effect of field surface wind velocity of conservation tillage farmland
Authors:Zhao, Yonglai (1); Ma, Shuoshi (1); Chen, Zhi (2); Sun, Yuechao (1); Wang, Ronglian (3)
Author affiliation:(1) Vocational and Technical College of Inner Mongolia Agricultural University, Baotou 014109, China; (2) Mechanical and Electronic Engineering College of Inner Mongolia Agricultural University, Huhhot 010018, China; (3) Inner Mongolia Institute of Water Resources Research, Huhhot 010019, China
Corresponding author:Chen, Z.(chz6653@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:33-38
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to evaluate wind velocity resistance effect of conservation tillage farmland, an experiment was conducted on wind velocity resistance effect of field surface under conservation tillage compared with conventional tillage by means of movable wind tunnel. The influence of wind velocity resistance effect on field surface wind velocity profile was analyzed comparatively with different crop stubbles coverage. The results indicated that the wind velocity profiles of conservational tillage farmland surface with different crop stubbles coverage were obviously different from that of conventional tillage farmland, the wind velocity of conservational tillage farmland was 2.5-10 times less than that of conventional tillage farmland below the height of field surface 50 cm. The best height of wind velocity resistance was 0.1 m from field surface. The relative wind velocity reduction ratio reached to 76.32% when its vegetation coverage was 90%. The field surface wind velocity resistance effect strengthened with the increase of wind tunnel center speed and got up to the best level when wind velocity was 12 m/s.
Number of references:26
Main heading:Surface resistance
Controlled terms:Agricultural machinery - Conservation - Crops - Farms - Velocity - Wind tunnels
Uncontrolled terms:Conservation tillage - Conventional tillage - On-resistance - Reduction ratios - Relative wind velocity reduction ratio - Surface wind velocities - Vegetation coverage - Wind velocities - Wind velocity resistance
Classification code:423 Non Mechanical Properties and Tests of Building Materials - 454 Environmental Engineering - 651.2 Wind Tunnels - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 931.1 Mechanics - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2011.10.006
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514853
Title:Environment control status of high temperature in reproductive piggery in Beijing
Authors:Wang, Meizhi (1); Tian, Jianhui (1); Liu, Jijun (1); Wu, Zhonghong (1); Zhang, Yu (1)
Author affiliation:(1) College of Animal Science and Technology, China Agriculture University, Beijing 100193, China
Corresponding author:Wu, Z.(wuzhh@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:222-227
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:High temperature is an important environmental factor that influences reproduction of pig. In order to lessen heat stress of reproductive pig, construction types of pig house and cooling methods of reproductive piggery were investigated in 2009, indicators of thermal insulation of common types of wall of piggery were calculated, and inner temperature of the reproductive pig houses was tested. The result indicated that the proportion of enclosed, semi-enclosed and greenhouse pig house was 74.0%, 23.7% and 2.3% respectively. Among present wall materials, the performance of thermal insulation of composite wall with brick covered with polystyrene foam plastic was the best. In test periods, inner temperature of piggery was consistent with outer temperature of piggery approximately, inner temperature of piggery was higher than outer temperature in most time. In the end, advices of high temperature environment control were proposed.
Number of references:20
Main heading:Thermal insulation
Controlled terms:Foams - Heating - Houses - Mammals - Polystyrenes
Uncontrolled terms:Boar house - Composite wall - Cooling methods - Environment control - Environmental factors - Heat stress - High temperature - High-temperature environment - Outer temperature - Pig house - Polystyrene foams - Pregnant and dry sow house - Wall materials
Classification code:402.3 Residences - 413.2 Heat Insulating Materials - 643.1 Space Heating - 804 Chemical Products Generally - 815.1.1 Organic Polymers - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2011.10.039
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514823
Title:Numerical simulation for rotor-stator interaction of centrifugal pump with different tongues
Authors:Zhu, Lei (1); Yuan, Shouqi (1); Yuan, Jianping (1); Zhou, Jianjia (1); Jin, Rong (1); Wang, Hui (1)
Author affiliation:(1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Yuan, S.(shouqiy@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:50-55
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 rotor-stator interaction with different tongues of the centrifugal pump, the three-dimensional unsteady flow in the centrifugal pump with long-tongue, middle-tongue and short-tongue respectively, was simulated numerically using the dynamical subgrid-scale models. Variable characters of pressure fluctuation and radial hydraulic force on the impeller and volute with different tongues were achieved with a comparison was done. The results indicate that: as a result of the rotor-stator interaction, the distributions of the radial hydraulic force on the impeller vector coordinates have a obvious character of hexagonal star with different tongues under different running conditions and the distributions of the radial hydraulic force on the volute vector coordinates are presented ellipse using different tongues under different running conditions; the head increases and high efficiency area of the pump broaden using short-tongue; the radial hydraulic force on the impeller and volute changes with time; the pressure fluctuations near tongue and the radial hydraulic forces on the impeller of pumps decrease using middle-tongue and short-tongue.
Number of references:14
Main heading:Pumps
Controlled terms:Axial flow - Centrifugal pumps - Hydraulic machinery - Hydraulics - Impellers - Pumping plants - Rotors (windings) - Stators - Three dimensional
Uncontrolled terms:High efficiency - Hydraulic force - Pressure fluctuation - Radial hydraulic force - Rotor-stator interactions - Running conditions - Sub-grid scale models - Three-dimensional unsteady flow
Classification code:902.1 Engineering Graphics - 705.1 Electric Machinery, General - 704.1 Electric Components - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 631.1 Fluid Flow, General - 618.2 Pumps - 601.2 Machine Components - 446 Waterworks
DOI:10.3969/j.issn.1002-6819.2011.10.009
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514864
Title:Contamination zoning for soil heavy metal at county scale in developed area
Authors:Li, Da (1); Zhou, Shenglu (1); Wu, Shaohua (1); Qi, Shusi (2)
Author affiliation:(1) School of Geographic and Oceangraphic Sciences, Nanjing University, Nanjing 210093, China; (2) Bureau of Land and Resources of Liuzhou, Liuzhou 545001, China
Corresponding author:Zhou, S.(zhousl@nju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:282-286
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:Soil heavy metal contamination is a hot issue of social concern, and its regionalization is the basis of remediation. The integrated approaches of geo-statistical, cluster analysis, and principal component analysis were applied to conduct the soil heavy metals contamination zoning of Kunshan at county scale. The results of zoning included two grades, five soil contamination zones and ten soil contamination sub-zones according to cluster analysis of soil contamination and contamination-forming environment. The integrated approach of the two-step cluster analysis not only revealed the spatial differences of heavy metals contamination distribution in this area, but also further reflected the key factors which caused the contamination from outside of each unit. The research can provide some references to the heavy metal contamination control and remediation.
Number of references:20
Main heading:Soil pollution
Controlled terms:Cluster analysis - Contamination - Heavy metals - Integrated control - Metal analysis - Metals - Principal component analysis - Radioactive materials - Soils - Zoning
Uncontrolled terms:Contamination distribution - Contamination-forming environment - Heavy metal contamination - Integrated approach - Key factors - Social concerns - Soil contamination - Spatial differences
Classification code:922.2 Mathematical Statistics - 922 Statistical Methods - 731.1 Control Systems - 723 Computer Software, Data Handling and Applications - 714.2 Semiconductor Devices and Integrated Circuits - 622.1 Radioactive Materials, General - 531 Metallurgy and Metallography - 483.1 Soils and Soil Mechanics - 403.2 Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2011.10.050
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514857
Title:Techno-economic assessment on pilot-scale plant for fuel ethanol production from sweet sorghum stem by solid state fermentation
Authors:Mei, Xiaoyan (1); Liu, Ronghou (1); Cao, Weixing (1)
Author affiliation:(1) Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China; (2) Liaoning Institute of Managerial Staff, Shenyang 110161, China
Corresponding author:Liu, R.(liurhou@sjtu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:243-248
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 technological process of pilot-scale plant for fuel ethanol production from sweet sorghum stem by solid state fermentation, which was set up in Weihai city, Shandong province of China, was described and techno-economic assessment of the plant was conducted with cost and profit analysis. Results showed that the ethanol conversion efficiency relative to theoretical yield was up to 95.8%. The residual vinasse was re-fermented and protein feed with 8% crude protein was obtained. The cost and benefit analysis showed that costs of absolute ethyl alcohol production and protein feed production were 5033.8 yuan/t and 101 yuan/t, respectively. Cash flow analysis showed that Net Present Value, Internal Return Rate and Profit/Cost of financial analysis in project level were 2817.5 thousands yuan, 16.05% and 0.953, respectively when the social discount rate was 10%. And the dynamic pay-back period was 9-10 years. As a result, the project has a certain ability of making a profit. The sensitivity analysis showed that the sensitivity of IRR to changes of product price and operating cost was the highest and the sensitivity of IRR to initial investment was the lowest. The market risk of this project depends mainly on the product price at the current scale and technological conditions.
Number of references:16
Main heading:Cost benefit analysis
Controlled terms:Conversion efficiency - Costs - Economic analysis - Ethanol - Fermentation - Profitability - Proteins - Rating - Sensitivity analysis
Uncontrolled terms:Cash flow analysis - Cost and benefits - Crude proteins - Discount rates - Financial analysis - Fuel ethanol - Market risks - Net present value - Pilot scale - Product price - Profit analysis - Project levels - Shandong province - Solid-state fermentation - Sweet sorghum - Sweet sorghum stems - Techno-economic assessment - Technological conditions - Technological process - Theoretical yield - Vinasses
Classification code:921 Mathematics - 911.2 Industrial Economics - 911 Cost and Value Engineering; Industrial Economics - 902.2 Codes and Standards - 804.1 Organic Compounds - 802.2 Chemical Reactions - 525.5 Energy Conversion Issues
DOI:10.3969/j.issn.1002-6819.2011.10.043
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514829
Title:Influence factors on quality and properties of straw blocks and cost analyses
Authors:Zhang, Zhijun (1); Wang, Huijie (2); Li, Huizhen (1); Nan, Jianfu (2)
Author affiliation:(1) College of Chemical and Environmental Engineering, North University of China, Taiyuan 030051, China; (2) Institute of Cotton, Shanxi Academy of Agricultural Sciences, Yuncheng 044000, China
Corresponding author:Zhang, Z.(zjzhang@nuc.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:83-87
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:In order to study the quality and properties of straw block (SB), five crops straw materials were used to product SB, and the product forming rate, strength, seedling breeding effect and cost were evaluated and analyzed through experiments. Results showed that forming rate of machine-molding, water absorption, emergence rate and process cost of SB increased with the increase of straw grinding fineness, but breakage rate and root growth decreased. Forming rate of SB mainly related to grinding fitness, while breakage rate, water absorption and seedling quality related to both types of materials and grinding fitness. Among the 5 materials, SB from perilla stalk was best in product quality and seedling effect while SB from corn stalk had the lowest process costs. Therefore, SB from corn stalk and perilla stalk were suitable in production.
Number of references:18
Main heading:Cost benefit analysis
Controlled terms:Cost accounting - Costs - Grinding (comminution) - Grinding (machining) - Health - Molding - Water absorption
Uncontrolled terms:Corn stalk - Cost analysis - Forming rate - Influence factors - Perilla - Process costs - Product quality - Root growth - Seedling - Seedling quality
Classification code:535.2 Metal Forming - 606.2 Abrasive Devices and Processes - 802.3 Chemical Operations - 911 Cost and Value Engineering; Industrial Economics - 911.1 Cost Accounting - 914.3 Industrial Hygiene
DOI:10.3969/j.issn.1002-6819.2011.10.015
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514882
Title:Effect of refining technology on content of trans fatty acids in linseed oil
Authors:Zhang, Ming (1); Li, Guihua (1); Zhao, Fang (1); Yang, Junwang (2)
Author affiliation:(1) School of Food Science and Technology, Henan University of Technology, Zhengzhou 450052, China; (2) Chenguang Biotech Group Co. Ltd., Handan 057250, China
Corresponding author:Li, G.(liguihua@haut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:388-392
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the best linseed oil physical refining process conditions, the differences impact on refined linseed oil quality between physical refining process and chemical refining process were compared. Taken pressed linseed oil as raw material, which had 55% linolenic acid, the content of trans-acid and the law of linseed oil quality in the oil refining process were studied. The result showed that both chemical refining and physical refining technology could control the acid value below 0.3 mg/g. During chemical refining process, the content of the trans-acid in linseed oil remained was 0.2%-0.4%; while during physical refining process, under the condition of 200°C, absolute pressure 10-50 Pa, the content of trans-acid obviously changed. The content of trans-acid in bleaching oil was 0.27%, while the content of trans-acid were 0.91% and 1.73%, respectively, after four hours and eight hours physical refining process. The result also showed that the oil quality in chemical refining process changed slightly and the peroxide value was 4.1 mmol/kg, while in physical refining process the peroxide value at the first six hours was less than 6 mmol/kg and increased slowly.
Number of references:11
Main heading:Petroleum refining
Controlled terms:Drying oils - Fatty acids - Oilseeds - Oxidation - Quality control - Refining
Uncontrolled terms:Absolute pressure - Acid value - Chemical refining - Linolenic acids - Linseed oil - Oil quality - Oil refining process - Peroxide value - Refining process - Trans fatty acid
Classification code:513.1 Petroleum Refining, General - 802.2 Chemical Reactions - 804.1 Organic Compounds - 813.2 Coating Materials - 821.4 Agricultural Products - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2011.10.068
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514877
Title:Effect of nano-SiO<inf>2</inf> on water vapor transmission rate of formed film of PVA- based composite coating-packaging material
Authors:Lei, Yanxiong (1); Yin, Yueling (1); Jin, Guofeng (1); Zhang, Jianhao (1)
Author affiliation:(1) National Center of Meat Quality and Safety Control, Key Lab. of Meat Processing and Quality Control, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China; (2) Key Lab. of Food Processing and Quality Control, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Zhang, J.(nau_zjh@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:359-364
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:Application of polyvinyl alcohol (PVA) in food packaging is greatly limited because of its hydrophilic property. PVA-based composite coating-packaging material was modified by adding nano-SiO<inf>2</inf> in order to improve the efficiency of water vapor barrier. The individual and interactive effects of nano-SiO<inf>2</inf>, stearic acid, and glutaraldehyde on the water vapor transmission of formed film of composite coating-packaging material were investigated by response surface methodology. The results showed that the water vapor barrier performance of the PVA-based composite coating-packaging material could be effectively enhanced by modifying of nano-SiO<inf>2</inf>. The water vapor transmission ratio of formed film of optimize group (8.18 g/(m2&middotd)) was decreased by 26.61% (P<0.05) compared with the control group (no nano-SiO<inf>2</inf>). There were significant interactions between nano-SiO<inf>2</inf> and stearic acid and between nano-SiO<inf>2</inf> and glutaraldehyde for the effects on the water vapor transmission of formed film of composite coating-packaging material. With the increase of nano-SiO<inf>2</inf> within the range below 0.05 g in 100 mL PVA solution (0.05 g/mL), the water vapor transmission rate of composite coating-packaging material was decreased and the water vapor barrier performance was improved with the increase of the proportion of stearic acid and glutaraldehyde.
Number of references:16
Main heading:Nanocomposite films
Controlled terms:Aldehydes - Building materials - Coatings - Composite coatings - Optimization - Packaging - Packaging materials - Polyvinyl alcohols - Silicon compounds - Stearic acid - User interfaces - Water vapor
Uncontrolled terms:Composite coating-packaging material - Control groups - Food packaging - Glutaraldehydes - Hydrophilic properties - Interactive effect - Nano- SiO - PVA-based - Response Surface Methodology - Water vapor barriers - Water vapor transmission - Water vapor transmission rate
Classification code:921.5 Optimization Techniques - 694.2 Packaging Materials - 712.1 Semiconducting Materials - 722.2 Computer Peripheral Equipment - 804.1 Organic Compounds - 813.2 Coating Materials - 815.1.1 Organic Polymers - 694.1 Packaging, General - 415 Metals, Plastics, Wood and Other Structural Materials - 414 Masonry Materials - 413 Insulating Materials - 412 Concrete - 411 Bituminous Materials - 641 Heat and Mass Transfer; Thermodynamics
DOI:10.3969/j.issn.1002-6819.2011.10.063
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514834
Title:Estimation method and parameter analysis on root length in wheat
Authors:Hu, Juncheng (1); Tang, Liang (1); Liu, Xiaojun (1); Cao, Weixing (1); Zhu, Yan (1)
Author affiliation:(1) National Engineering and Technology Center for Information Agriculture, Jiangsu Key Laboratory for Information Agriculture, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Zhu, Y.(yanzhu@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:112-117
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Simulation model and parameter analysis on root elongation process in wheat would provide technical basis for quantifying morphological formation and visualization of crop plant. With growing degree-day as time scale, the generation processes of primary root system, nodal root system and root branches were simulated based on the basic root unit and the synchronous relationship between root and leaf growth. The model of root developmental stage was built by calculating physiological ages of different types of root. The elongation process and total length of root were modeled with linear equations. The models were tested with independent experimental data. The comparison between simulated and measured accumulated root length and root number showed that the values of root mean square error were 370.68 cm and 1.27, and the values of relative error were 0.27 and 0.16, respectively. Sensitivity analysis indicated that the parameter variations resulted in the modest changes in simulation results, and the model performed well in predicting the dynamic changes in total root length and topological of root structure in wheat.
Number of references:21
Main heading:Parameter estimation
Controlled terms:Computer simulation - Crops - Elongation - Physiological models - Sensitivity analysis - Topology - Visualization
Uncontrolled terms:Crop plants - Developmental stage - Dynamic changes - Elongation process - Estimation methods - Experimental data - Generation process - Leaf growth - Nodal roots - Parameter analysis - Parameter variation - Physiological ages - Primary roots - Relative errors - Root branch - Root elongation - Root length - Root mean square errors - Root number - Root structure - Root system - Simulation model - Simulation result - Time-scales - Total length - Total root lengths - Wheat
Classification code:902.1 Engineering Graphics - 821.4 Agricultural Products - 731.1 Control Systems - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 723.5 Computer Applications - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 461.1 Biomedical Engineering
DOI:10.3969/j.issn.1002-6819.2011.10.020
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514836
Title:Rural land management right and its transfer survey based on 3S technologies
Authors:Zhang, Weiwei (1); Sun, Danfeng (2); Yu, Jun (1); Zhou, Liandi (1); Li, Hong (1)
Author affiliation:(1) Institute of System Comprehensive Development, Beijing Academy of Agriculture and Forest Science, Beijing 100097, China; (2) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
Corresponding author:Li, H.(lihsdf@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:125-130
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 clarify the spatial distribution of rural land management right and its transfer, to solve the land transfer inducing problems, and to provide dynamic spatial information for guiding the land policy, the spatial investigation of 1:10000 scale rural land management right and its transfer information was developed based on high-resolution remote sensing images and mobile GIS. The key technologies were: high resolution image segmentation, boundary points interpretation, GIS drawing and mobile GIS acquisition. Ultimately the database for rural land management right and its transfer information were built. Compared to the other survey methods, such as GPS-RTK survey, single mobile GIS investigation and interpreting and drawing based on air photos, this method was more suitable for large area survey, which can keep survey accuracy, improve the work efficiency and reduce the cost of the investigation. Through Beijing case demonstration, this technical method in the future was discussed, which can provide the tech-support and workflow reference for other regions.
Number of references:19
Main heading:Surveys
Controlled terms:Forestry - Image reconstruction - Image segmentation - Investments - Land use - Remote sensing
Uncontrolled terms:3S Technology - Boundary points - High resolution image - High resolution image segmentation - High resolution remote sensing - Key technologies - Land managements - Land transfer - Mobile GIS - Right transfer - Spatial informations - Survey accuracy - Survey methods - Transfer information - Work efficiency
Classification code:911.2 Industrial Economics - 821.0 Woodlands and Forestry - 741.1 Light/Optics - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 405.3 Surveying - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2011.10.022
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514845
Title:Effects of tillage and straw returning on nitrogen leakage in double rice cropping field
Authors:Cui, Siyuan (1); Yin, Xiaogang (1); Chen, Fu (1); Tang, Haiming (2); Li, Feng (3); Zhang, Hailin (1)
Author affiliation:(1) Key Laboratory of Farming System, Ministry of Agriculture of the People's Republic of China, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; (2) Hunan Soil and Fertilizer Institute, Changsha 410125, China; (3) Ningxiang Agricultural Bureau, Changsha, Hunan Province, Changsha 410600, China
Corresponding author:Zhang, H.(hailin@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:174-179
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Tillage affects the nitrogen leakage by changing soil physical and chemical properties. The effects of tillage on soil permeability and nitrogen leakage were studied for increasing utilization efficiency of nitrogen in paddy field. Long-term field experiments were established from 2005 in a double rice cropping region, Ningxiang county, Hunan province of China. Treatments included no-tillage with straw returning(NT), rotary-tillage with straw returning (RT), conventional tillage with straw returning (CT) and conventional tillage without straw returning (CT<inf>0</inf>). Constant-head method was used to analyze soil hydraulic conductivity in the soil layer 0-80 cm. Results showed that there was an increase in soil hydraulic conductivity in NT, which was 63.14% and higher than that in CT. Higher leakage of NH<inf>4</inf> -N and NO<inf>3</inf>--N (p<0.05) were found in NT than in other treatments. Straw returning enhanced the leakage of NO<inf>3</inf>--N, especially in the period of early rice cultivation. The annual leakage of NH<inf>4</inf> -N was almost two times than that of NO<inf>3</inf>--N among each treatment. Compared with other tillage treatments, NT could increase nitrogen leakage, and more attention should be focused on NH<inf>4</inf> -N leakage in long-term flooding paddy fields.
Number of references:23
Main heading:Agriculture
Controlled terms:Agricultural machinery - Chemical properties - Hydraulic conductivity - Nitrogen - Soil conservation - Soil moisture
Uncontrolled terms:Conservation tillage - Conventional tillage - Cropping field - Field experiment - Hunan province - No tillage - Paddy fields - Rice cultivation - Soil hydraulic conductivity - Soil layer - Soil permeability - Soil physical and chemical properties - Tillage treatment - Utilization efficiency
Classification code:821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804 Chemical Products Generally - 801 Chemistry - 632.1 Hydraulics - 483.1 Soils and Soil Mechanics - 423 Non Mechanical Properties and Tests of Building Materials
DOI:10.3969/j.issn.1002-6819.2011.10.031
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514833
Title:Relationship between F730/F685 ratio of delayed fluorescence spectrum and plant heat resistance
Authors:Li, Ying (1); Xu, Wenhai (1)
Author affiliation:(1) College of Information Science Technology, Dalian Maritime University, Dalian 116026, China
Corresponding author:Xu, W.(whxu@newmail.dlmu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:107-111
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to research the relationship between spectral properties of delayed fluorescence and plant heat resistance, three different samples (Bean Jinghuang No.3, Queen's Crape Myrtle Lagelstroemia indica L, maize s5-168) were used as materials to experimentally study on the plant delayed fluorescence emission spectra at elevated temperatures (25-55°C). The maximal values of DF emission spectra at 685 nm and 730 nm were marked as F685 and F730 respectively. After analyzing the characteristic of temperature response curve of F730/F685 ratio, the cause of the formation of inflexion on the temperature response curve of F730/F685 ratio, and the temperature responses of five chlorophyll fluorescence parameters, it was concluded that DF emission spectra varied with the temperature-stress, and the responses of F730/F685 ratio of DF emission spectra to the temperature for the different samples could be a new and useful judgment to identify and evaluate the heat-resisting property of the samples. Moreover, the temperature inflexion of the temperature response curve of F730/F685 ratio could be a new identification index of plant heat resistance.
Number of references:20
Main heading:Fluorescence
Controlled terms:Chlorophyll - Emission spectroscopy - Heat resistance - Specific heat - Spectrum analysis
Uncontrolled terms:Chlorophyll fluorescence parameters - Delayed fluorescence - Elevated temperature - Emission spectrums - Heat-resisting - Maximal values - Peak ratios - Plants - Spectral properties - Temperature dependence - Temperature response - Temperature response curve - Temperature stress
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 931.2 Physical Properties of Gases, Liquids and Solids - 921 Mathematics - 804.1 Organic Compounds - 741.1 Light/Optics - 641.1 Thermodynamics
DOI:10.3969/j.issn.1002-6819.2011.10.019
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514856
Title:Biodiesel production in magnetically stabilized fluidized bed reactor by whole-cell bio-catalyst
Authors:Li, Liping (1); Chen, Guanyi (1); Huang, Yeqian (1)
Author affiliation:(1) State Key Laboratory of Engines, School of Environmental Science and Technology, Tianjin University, Tianjin 300072, China
Corresponding author:Chen, G.(chen@tju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:238-242
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:An experimental study of biodiesel production in a self-made magnetically fluidized bed by superparamagnetic whole-cell catalyst was conducted. By changing the magnetic field strength, methanol to oil molar ratio, catalyst concentration, flow rate and other factors, effects of different factors on the continuous transesterification reaction had been found. The optimized factors of single-stage fluidized bed catalytic transesterification of waste oil were using magnetic steady-state operation, methanol to oil molar ratio of 1:1, quantity of catalyst with 12% of oil and the feed rate of 42.6 mL/min. The final methyl ester production rate of the four-stage continuous magnetically fluidized bed reactor system was over 85%. Even after 200 h continuous operation, the production rate of the forth export was more than 80 %.The results showed that the whole-cell catalyst in the magnetically fluidized bed had high activity and long service life, the system had a good operational stability.
Number of references:22
Main heading:Fluidized beds
Controlled terms:Biodiesel - Catalysts - Chemical reactors - Fluid catalytic cracking - Fluidization - Fluidized bed furnaces - Magnetic field effects - Methanol - Superparamagnetism
Uncontrolled terms:Biodiesel production - Catalyst concentration - Catalytic transesterification - Continuous operation - Experimental studies - Feed-rates - Fluidized bed reactors - High activity - Long service life - Magnetic field strengths - Magnetically fluidized beds - Methyl esters - Molar ratio - Operational stability - Production rates - Single stage - Steady-state operation - Superparamagnetics - Transesterification reaction - Waste oil
Classification code:804.1 Organic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802 Chemical Apparatus and Plants; Unit Operations; Unit Processes - 701.2 Magnetism: Basic Concepts and Phenomena - 642.2 Industrial Furnaces and Components - 523 Liquid Fuels
DOI:10.3969/j.issn.1002-6819.2011.10.042
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514876
Title:Online grading method for fresh-cut vegetables based on optimal invariant moments
Authors:Zhang, Shuifa (1); Wang, Kaiyi (1); Wang, Shufeng (1); Liu, Zhongqiang (1); Mao, Lu (1)
Author affiliation:(1) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Wang, K.(wangky@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:354-358
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 extract accurately fresh-cut vegetables from complex background of the image, an online classification method of fresh-cut vegetables was studied, which was based on the optimized moment invariant features model and integrates the two aspects of the moment invariant features (translation and rotation) and the excellent scale expressing ability of the geometrical features. First, geometrical and moment invariant features of the standard fresh-cut vegetables was got, and a mathematical model was set up with statistics,; then two types features of fresh-cut vegetables to be graded was extracted; finally, similarity between the features of the sample and that of the standard fresh-cut vegetables so as to accomplish the online classification was made out. Take example of the fresh-cut pieces of potatoes, 11 images with 679 pieces of potatoes was disposed, and accuracy of the classification up to 99.40%, while it takes only 0.108 seconds to work on one image. The experiment shows that the method can classify exactly, and have good real-time performance and robust result, and it can provide reference for the online classification of fresh-cut vegetables.
Number of references:13
Main heading:Vegetables
Controlled terms:Agricultural machinery - Color image processing - Computer vision - Mathematical models - Optimization
Uncontrolled terms:Complex background - Fresh-cut - Geometrical features - Hu moments - Invariant moment - Mathematical modeling - Moment invariant - On-line classification - Online grading - Real time performance
Classification code:741.1 Light/Optics - 741.2 Vision - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products - 921 Mathematics - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2011.10.062
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514825
Title:Operating mode control research of mild hybrid electric vehicle
Authors:Chen, Hanyu (1); Zuo, Chengji (1); Yuan, Yinnan (2); Zhang, Tong (2)
Author affiliation:(1) School of Mechanical and Automobile Engineering, Hefei University of Technology, Hefei 230009, China; (2) School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Chen, H.(losttheway@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:61-67
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 purpose of the practical engineering applications, the state transition between operating modes of HEV and the corresponding control strategy of the modes were analyzed. Through the opening variation of the accelerator pedal and the electronic throttle, the control strategy of HEV in driving mode was discussed in detail. The state logic model of the HEV's operating modes was built in Matlab/Simulink environment. And the performances of the HEV were simulated in the ECE15 EUDC driving cycle operating mode. Finally the emission and fuel consumption contrast experiments between the traditional vehicle and HEV were carried out on the roll test station. The simulation and test results show that the output torque of the engine and ISG motor can meet with the driving cycle requirements. HC emission decreases by 73.3%, and CO emission decreases by 35% of HEV, compared to that of the traditional vehicle, and the total emissions are much less than Europe III emission limits. At the same time, 100-kilometer fuel consumption approximately decreases by 15.1% and the fuel saving result is obvious.
Number of references:11
Main heading:Electric vehicles
Controlled terms:Fuel economy - Fuels - Secondary batteries - Steel metallurgy
Uncontrolled terms:Control strategies - Hybrid electric vehicle (HEV) - Operating modes - Simulation - Test
Classification code:521 Fuel Combustion and Flame Research - 522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 545.3 Steel - 702.1.2 Secondary Batteries
DOI:10.3969/j.issn.1002-6819.2011.10.011
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514828
Title:Optimization design of tea carding machine parameters based on ant colony algorithm
Authors:Li, Bing (1); Xia, Tao (2); Li, Shangqing (2)
Author affiliation:(1) School of Engineering, Anhui Agricultural University, Hefei 230036, China; (2) School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
Corresponding author:Xia, T.(xiatao62@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:79-82
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 driving performance and tea processing quality of tea carding machine, mathematical mode for tea carding machine optimum design was established in this paper. Based on the ant colony algorithms and Matlab, the realization programs regarding parameters simulation of tea carding machine were made. The programs were used in optimization simulation of the key transmission parameters. The optimization results and proving trial showed: when crank length was 59.1 mm, connecting rod length was 341.5 mm, eccentricity was 57.5 mm, slider stroke was 120 mm, auxiliary angle was 8.26°, angle between the two limiting positions was 3.5°, minimum transmission angle should changed from 50° to 70.1°, the noise decreased 5dB, and stripping tea rate increased 6%. The research can provide theoretical basis for improving the tea carding machine.
Number of references:16
Main heading:Algorithms
Controlled terms:Automobile drivers - Design - Global optimization - MATLAB - Optimization - Parameter estimation - Textile industry
Uncontrolled terms:Ant colony algorithms - Driving performance - Machine parameters - Optimization design - Optimization-simulation - Optimum designs - Processing quality - Tea carding machine - Theoretical basis - Transmission angle - Transmission parameters
Classification code:921.5 Optimization Techniques - 921 Mathematics - 819.6 Textile Mills, Machinery and Equipment - 731.1 Control Systems - 723 Computer Software, Data Handling and Applications - 432 Highway Transportation - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2011.10.014
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514818
Title:Experiment on conical threshing cylinder performance of plot wheat breeding seed combine harvester
Authors:Gao, Aimin (1); Dai, Fei (1); Sun, Wei (1); Zhang, Fengwei (1); Jing, Zhichen (2); Han, Zhengsheng (1)
Author affiliation:(1) College of Engineering, Gansu Agricultural University, Lanzhou 730070, China; (2) School of Mechanical Engineering, Longdong University, Qingyang 745000, China
Corresponding author:Han, Z.(hanzhengsheng@gsau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:22-26
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The conical threshing cylinder that used in plot wheat breeding seed harvester has small volume and lower power consumption, it also can speed up the axial conveying of materials and improve efficiency of machine cleaning. In order to study the performance of conical threshing cylinder deeply, the comparison tests of different constructive parameters based on longitudinal axial conical cylinder threshing unit were carried out. The result indicated that cylinder taper angle and threshing components were main constructive parameters which could affect the performance of threshing unit. Then a kind of composite tooth conical cylinder with 13° cylinder taper angle and short-rasp-bar tooth was developed after optimal parameters were confirmed. The experimental results showed that while the machine was working, threshing loss rate was 0.43%, rate of trash content was 6.23%, remaining rate of seed was 0, power consumption of threshing unit was 2.48 kW, which could meet the demand of plot wheat seed harvester.
Number of references:13
Main heading:Agriculture
Controlled terms:Cylinders (shapes) - Experiments - Harvesters - Machinery - Seed
Uncontrolled terms:Combine harvesters - Comparison test - Conical cylinder - Conical cylinders - Constructive parameters - Loss rates - Lower-power consumption - Optimal parameter - Performance - Speed-ups - Taper angles - Threshing component - Threshing units - Wheat breeding - Wheat seeds
Classification code:408.2 Structural Members and Shapes - 601 Mechanical Design - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2011.10.004
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514870
Title:Changes of land use and landscape pattern in Xichang city based on RS and GIS
Authors:Hu, Yufu (1); Deng, Liangji (1); Zhang, Shirong (1); Ling, Jing (1); Huang, Chengyi (1); Kuang, Xianhui (1); Liu, Liang (1)
Author affiliation:(1) College of Resources and Environment of Sichuan Agricultural University, Yaan 625014, China
Corresponding author:Deng, L.(auh6@sicau.edu.dn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:322-327
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 three periods of remote sensing images (TM in 1989, ETM in 1998, ASTER in 2008), the temporal and spatial variation of land use and landscape pattern in the recent 19 years in Xichang city in Sichuan province were analyzed by using RS, GIS technology and landscape ecological methods. The results showed that the main landscape types were forestland, grassland and cultivated land in the study area. And the area of forestland was largest, which accounted for more than 50% of the whole study area. During the recent two decades, the areas of cultivated land, grassland, unused land and water decreased continuously. Among them, the area of cultivated land decreased most, which decreased by 20.01%. The construction land and forestland increased obviously, of which the construction land increased by 64.55%. The changes of land use mainly concentrated in the Anning valley and the Qionghai basin, where the terrain was low and flat, the industry and agriculture distribution were centralized, and human-land conflict was intense. The mutual conversion among land use types was frequently due to the intervention of human activities. And the major patterns of 1and use change were the conversions of cultivated land to construction land and forestland, grassland to forestland and cultivated land, unused land to cultivated land and grassland, and water to cultivated land and construction land. From 1989 to 2008, the landscape diversity index decreased from 1.323 to 1.256, the landscape evenness index decreased from 0.738 to 0.701, and the dominance index increased from 0.469 to 0.536, which indicated that landscape heterogeneity reduced in the study area.
Number of references:27
Main heading:Land use
Controlled terms:Geographic information systems - Image reconstruction - Landforms - Remote sensing
Uncontrolled terms:Construction land - Cultivated lands - Ecological methods - Forest land - Geographic information - GIS technology - Human activities - Land use type - Landscape diversity - Landscape evenness index - Landscape pattern - Landscape type - Remote sensing images - RS and GIS - Sichuan province - Study areas - Temporal and spatial variation
Classification code:403 Urban and Regional Planning and Development - 481.1 Geology - 723.3 Database Systems - 731.1 Control Systems - 741 Light, Optics and Optical Devices
DOI:10.3969/j.issn.1002-6819.2011.10.056
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514854
Title:Performance of facade balcony type solar water heaters
Authors:Li, Ming (1); Zheng, Tufeng (2); Ji, Xu (1); Wei, Shengxian (1)
Author affiliation:(1) Solar Energy Research Institute, Yunnan Normal University, Kunming 650092, China; (2) School of Physics and Electronic Information, Yunnan Normal University, Kunming 650092, China
Corresponding author:Li, M.(liming@ynnu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:228-232
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:This paper experimentally studied the thermal performances of the flat-plate solar water heater and the all-glass vacuum tube solar water heater. The effects of the placement of the collector (southern facade horizontal row and vertical row), and the circulation type (natural circulation and forced circulation) on the system thermal performance and the tank stratification were achieved. The results showed that for the southern facade balcony-style all-glass vacuum tube solar water heaters, the water circulation was faster when the collector was placed horizontally, and the thermal efficiency increased by 12%. For the southern facade balcony flat-plate type solar water heater, when the system run under natural circulation, whether the collector was placed horizontally or vertically, liquid circulation is not smooth, and the thermal efficiency of the system was less than 30%. Forced circulation could effectively improve the circulation. The average inlet and outlet temperatures kept stable, and the system efficiency was 63% approximately when the system run under forced circulation.
Number of references:18
Main heading:Collector efficiency
Controlled terms:Efficiency - Facades - Glass - Heating equipment - Natural convection - Solar heating - Solar water heaters - Tanks (containers) - Vacuum
Uncontrolled terms:Balcony - Flat plate - Liquid circulation - Natural circulation - Outlet temperature - System efficiency - Tanks - Thermal efficiency - Thermal Performance - Vacuum tube - Water circulation
Classification code:812.3 Glass - 702.3 Solar Cells - 657.1 Solar Energy and Phenomena - 643.1 Space Heating - 913.1 Production Engineering - 642.2 Industrial Furnaces and Components - 633 Vacuum Technology - 619.2 Tanks - 402 Buildings and Towers - 641.2 Heat Transfer
DOI:10.3969/j.issn.1002-6819.2011.10.040
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514843
Title:Effect of tillage methods and water treatment on production and water use of cotton
Authors:Liu, Hao (1); Sun, Jingsheng (1); Zhang, Jiyang (1); Wang, Congcong (2); Yue, Jingjing (3); Zhang, Junpeng (1); Shen, Xiaojun (1)
Author affiliation:(1) Key Lab. for Crop Water Requirement and Regulation of Ministry of Agriculture, Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China; (2) Institute of Water Conservancy and Electric Power, Hebei University of Engineering, Handan 056038, China; (3) North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China
Corresponding author:Sun, J.(jshsun623@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:164-168
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 develop a suitable tillage method and irrigation schedule of transplanted cotton following wheat harvest under sprinkler irrigation, three treatments such as plowing tillage, no-tillage and minimum tillage were designed in this paper, and two water deficit treatments with 60% and 50% of field capacity were set at both bud stage and flower and boll stage under minimum tillage method, respectively. The effects of different tillage methods and soil water regime on total water consumption, seed yield, water use efficiency and fiber quality on transplanted cotton following wheat harvest were analyzed. The results showed that plowing tillage and minimum tillage did not have significant influence on water consumption, seed yield, water use efficiency and fiber quality of cotton. Although no-tillage had significant influence on water consumption and seed yield, it could save water by 19.96% and reduced yield by 13.15%. The minimum tillage with water deficit at bud stage and at flower and boll stage restrained the boll growth, significantly reduced the boll number, and reduced seed yield with increasing water deficit degree, especially if water deficit was at the same degree, rate of reduction of output at bud stage would be higher than that at flower and boll stage. Different tillage methods did not affect the fiber quality of cotton significantly, but water deficit reduced fiber quality. Therefore, minimum tillage methods can play a role in water and soil conservation without reducing yield, and its irrigation control index is to keep soil moisture above 70% of field capacity at the bud stage and at flower and boll stage.
Number of references:17
Main heading:Agriculture
Controlled terms:Agricultural machinery - Cotton - Efficiency - Fibers - Seed - Soil conservation - Soil moisture - Sprinkler systems (irrigation) - Water supply
Uncontrolled terms:Control index - Fiber quality - Field capacity - Irrigation schedule - Minimum tillage - No tillage - Rate of reduction - Seed yield - Soil water regime - Sprinkler irrigation - Tillage methods - Water consumption - Water deficit - Water deficits - Water use - Water use efficiency - Wheat harvest - Yield
Classification code:446.1 Water Supply Systems - 483.1 Soils and Soil Mechanics - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.1 Production Engineering
DOI:10.3969/j.issn.1002-6819.2011.10.029
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514816
Title:Design of test-bed for automatic depth of furrow opening control system based on ATmega128 single chip microcomputer
Authors:Cai, Guohua (1); Li, Hui (1); Li, Hongwen (1); Wang, Qingjie (1); He, Jin (1); Ni, Jiliang (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Li, H.(lihongwen@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:11-16
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To develop an automatic depth of furrow opening control system for no-till seeders, an automatic depth of furrow opening control system for indoor test-bed was designed. It was made up of a measuring unit, a controller, a driving board, hydraulic system, adjusting mechanism, an opener, and so on. And it achieved tracking control of the depth of furrow opening. The results indicated that when the depth of furrow opening was 50 mm deeper than the desired value, the steady-state response time was about 0.48 s, and when that is shallower than the desired value, the steady-state response time was about 0.6 s, The maximum error of them both were less than 10 mm. The results also showed that when the undulation slope of surface imitating board was smaller(motor speed was about 10 r/min), the dynamic response error was limited to -30-30 mm, when that was bigger (motor speed was about 25 r/min), the dynamic response error was limited to -60-40 mm. The imitating static and dynamic response experiment could be carried out based on this test-bed for automatic depth of furrow opening control system, while control strategy should be studied further to decrease time of improve the performance of the system.
Number of references:16
Main heading:Controllers
Controlled terms:Control theory - Dynamic response - Hydraulic equipment - Hydraulic machinery - Hydraulics - Machine design - Response time (computer systems) - Test facilities
Uncontrolled terms:Adjusting mechanism - Agriculture machinery - Control strategies - Depth of furrow opening - Electro-hydraulic proportional control - Hydraulic system - Maximum error - Motor speed - No-till - Opening control system - Single chip microcomputers - Static and dynamic response - Steady-state response - Tracking controls
Classification code:731.1 Control Systems - 722.4 Digital Computers and Systems - 632.2 Hydraulic Equipment and Machinery - 732.1 Control Equipment - 632.1 Hydraulics - 408.1 Structural Design, General - 402.1 Industrial and Agricultural Buildings - 601 Mechanical Design
DOI:10.3969/j.issn.1002-6819.2011.10.002
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514839
Title:Analytical graphics for multi-environment trials of breed selection
Authors:Liu, Zhe (1); Wang, Hu (1); Yang, Jianyu (1); Li, Shaoming (1); Ma, Qin (1); Li, Lin (1); Zhang, Xiaodong (1); Zhu, Dehai (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Li, S.(lshaoming@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:142-147
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:Graphic analysis is an efficient way of data mining for multi-environment trials (MET). In order to fully exploit useful information in trials, make variety evaluation, selection and prediction efficiently and accurately, more analytical graphics that are suitable for various traits, understandable and easy-operating, need be introduced into MET. In this paper, three kinds of analytical graphics-radar, candlestick, and conditional format, accompany with their application methods were put forward based on the national MET data of maize in China. The results showed that: the 3 analytical graphics were suitable for various traits of MET, understandable, and easy-operating. Radar chart was good at comprehensive analysis of multi-index, including reliability and consistency of certain variety or environment, selection and comparison of varieties. Candlestick chart did well in comparing varieties or environments in detail and pattern discovery of single index, such as discriminating ability of test environment, superiority and stability of a variety. Conditional format is a good combination of data viewing and visualization. Using the 3 kinds of graphics will improve the efficiency of analyzing and decision making of MET.
Number of references:18
Main heading:Data visualization
Controlled terms:Decision making - Radar - Reliability analysis - Visualization
Uncontrolled terms:Analytical graphics - Application method - Biplot - Candlestick - Candlestick chart - Comprehensive analysis - Conditional format - Graphic analysis - Multi-environment trials - Multi-index - Pattern discovery - Radar chart - Test Environment
Classification code:716.2 Radar Systems and Equipment - 723.5 Computer Applications - 902.1 Engineering Graphics - 912.2 Management - 913 Production Planning and Control; Manufacturing
DOI:10.3969/j.issn.1002-6819.2011.10.025
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514868
Title:Spatial structure optimization of rural residential land based on spatial interaction
Authors:Yang, Li (1); Hao, Jinmin (1); Wang, Shaolei (1); Hong, Shuman (1); Zhou, Ning (1)
Author affiliation:(1) College of Resources Environmental Sciences, China Agricultural University, Beijing 100193, China
Corresponding author:Hao, J.(yanglicau@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:308-315
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:Spatial structure optimization of rural residential land is a premise and fundamental task of new rural construction and rural land consolidation. The interacted gravity value between rural settlement and near town was estimated based on the revised gravity model. Meanwhile, according to the requirements of new rural construction, the estimated indicators of the rural settlement potential were selected from development foundation, production conditions, living conditions and ecological environment. The potential values of rural settlements were calculated according to the revised potential model with the help of the quantitative indicators and multi-factor comprehensive evaluation method. Four kinds of rural residential land optimization types in Quzhou County were got: local urbanization type, key development type, restricted expansion type and combined migration type based on gravity value and potential value with the help of hierarchical cluster analysis. The results accord with local conditions, offered theoretical support for local new rural construction and some suggestion for other similar region.
Number of references:20
Main heading:Structural optimization
Controlled terms:Cluster analysis - Hierarchical systems - Rural areas - Value engineering
Uncontrolled terms:Comprehensive evaluation - Ecological environments - Gravity model - Hierarchical cluster analysis - Living conditions - Local conditions - Multi-factor - New rural - Potential Model - Potential values - Production condition - Quantitative indicators - Rural settlement - Spatial interaction - Spatial structure
Classification code:723 Computer Software, Data Handling and Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 911.5 Value Engineering - 921.5 Optimization Techniques - 922 Statistical Methods - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2011.10.054
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514875
Title:Online monitoring alcoholic fermentation based on electrical conductivity
Authors:Li, Chongwei (1); Song, Ruiqing (1); Song, Yong (2); Li, Hongtao (2); Sun, Qingshen (2)
Author affiliation:(1) College of Forestry, Northeast Forestry University, Harbin 150040, China; (2) Key Laboratory of Microbiology, College of Life Sciences, Heilongjiang University, Harbin 150080, China
Corresponding author:Song, R.(songrq1964@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:349-353
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 test the applicability of electrical conductivity for on-line monitoring alcohol fermentation process. The relationships between conductivity changes and reducing sugar contents, alcohol contents, or pH values were studied respectively. And the impacts of calcium chloride and ammonium sulfate on conductivity during alcoholic fermentation process were further explored. The results showed that there were certain logical relationships between conductivity changes and reducing sugar or alcohol contents respectively. That is, during the decrease stage of electrical conductivity, the electrical conductivity decreased with the decrease of reducing sugar, while increased with the increase of alcohol contents. The results indicated that conductivity could be used to reflect the contents of reducing sugar and alcohol indirectly. Meanwhile, the contents of alcohol and reducing sugar were in line with the parameters of the end of alcoholic fermentation when the conductivity reached its lowest point, then the end of alcoholic fermentation could be determined. There was a certain linear relationship between pH value and conductivity (the variation of pH value and conductivity were the same 60 h before fermentation.). The variation of conductivity could not be affected by calcium chloride and ammonium sulfate within a certain range. Therefore the conductivity could be applied in the on-line monitoring alcoholic fermentation progress and determining the end point of fermentation.
Number of references:15
Main heading:Fermentation
Controlled terms:Ammonium compounds - Calcium chloride - Driers (materials) - Electric conductivity - pH - Process control - Sugars - Voltage measurement
Uncontrolled terms:Alcohol contents - Alcohol fermentation - Alcoholic fermentation - Ammonium Sulfate - Conductivity changes - Electrical conductivity - End points - In-line - Linear relationships - Logical relationships - Online monitoring - pH value - Reducing sugars
Classification code:804.2 Inorganic Compounds - 804.1 Organic Compounds - 803 Chemical Agents and Basic Industrial Chemicals - 942.2 Electric Variables Measurements - 801.2 Biochemistry - 731 Automatic Control Principles and Applications - 701.1 Electricity: Basic Concepts and Phenomena - 801.1 Chemistry, General
DOI:10.3969/j.issn.1002-6819.2011.10.061
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514878
Title:Effects of electrolyzed water on texture and quality of obscure puffer fish (Takifugu obscurus) during cold storage
Authors:Zhou, Ran (1); Liu, Yuan (1); Xie, Jing (1); Wang, Xichang (1); Gao, Qiming (2); Chen, Qingyan (2); Ma, Yan (1)
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:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:365-369
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To investigate the effect of electrolyzed water on the quality of obscure puffer fish (Takifugu obscurus) during storage at 4°C, changes in the total viable count of aerobic bacteria, pH value, total volatile basic nitrogen, thiobarbituric acid, and the texture such as firmness, springiness and resilience of the refrigerated puffer fish were assayed periodically. The myofibril length of puffer fish flesh, which was associated with flesh softening, was also measured at the beginning and end of the storage time. The results showed that compared with the control, electrolyzed water treatment could slow down the breakdown of muscle myofibril, thereby reducing texture changes in fish flesh during storage. At the end of the storage, the firmness, springiness and resilience of fish flesh treated with electrolytic water were 1.10-1.45 times than that of the control (p<0.05). Electrolyzed water reduced the changes in the total viable count of aerobic bacteria, pH value, total volatile basic nitrogen, thiobarbituric acid of fish flesh, extend the shelf life of puffer fish flesh for up to 50% during cold storage (4°C). This study can provide reference for the storage and preservation of puffer fish.
Number of references:23
Main heading:Fish
Controlled terms:Aerobic bacteria - Bacteriology - Cold storage - pH - Quality control - Refrigerators - Textures - Water treatment
Uncontrolled terms:Basic nitrogen - Electrolyzed water - pH value - Puffer fish - Shelf life - Storage time - Thiobarbituric acid - Total viable counts
Classification code:913.3 Quality Assurance and Control - 801.2 Biochemistry - 801.1 Chemistry, General - 933 Solid State Physics - 644.3 Refrigeration Equipment and Components - 461 Bioengineering and Biology - 445.1 Water Treatment Techniques - 461.9 Biology
DOI:10.3969/j.issn.1002-6819.2011.10.064
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514844
Title:Effect of soil depth on water movement in simulated finger flow
Authors:Wu, Shuying (1); Zhang, Jianfeng (1); Gao, Rui (1); Yang, Xiao (1); Li, Tao (1); Song, Liling (1); Sui, Cuijuan (1)
Author affiliation:(1) Institute of Water Resources, Xi'an University of Technology, Xi'an 710048, China
Corresponding author:Zhang, J.(jfzhang@mail.xaut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:169-173
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:Finger flow can be produced in the layered soil which the structure is the "soil top and sand bottom". In the condition of finger flow happens, the thickness of upper soils is one of the main factors to influence the development of finger flow. The experiment to simulate the finger flow in the sand layer of the bottom was conducted to research the influence of thickness of upper soils on the layered soil moisture movement. The results indicated that the period that the wetting front of finger flow region arrived in a certain depth increased with the increase of the thickness of upper soils. The stable infiltration rate decreased with the increase of the thickness of upper soils. And stable infiltration rate had linear relationship with the thickness of upper soils. Besides, the experience function model and the continuous function model used to simulate the moisture infiltration of the layer structure soil showed different strengths and weaknesses.
Number of references:15
Main heading:Geologic models
Controlled terms:Seepage - Soil mechanics - Soil moisture
Uncontrolled terms:Continuous functions - Flow regions - Function models - Infiltration rate - Layer structures - Layered soils - Linear relationships - Moisture movement - Sand layer - Simulation finger flow - Soil depth - Water movements - Wetting fronts
Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 441 Dams and Reservoirs; Hydro Development - 481.1 Geology - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2011.10.030
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514863
Title:Effect of different electrical conductivity on photosynthetic characteristics of cucumber leaves in greenhouse
Authors:Ni, Jiheng (1); Mao, Hanping (1); Ma, Wanzheng (1)
Author affiliation:(1) Institution of Agricultural Engineer, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Mao, H.(maohp@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:277-281
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the effect of different electrical conductivity (EC) on leaves photosynthetic characteristics, experiment was conducted in Venlo greenhouse at Jiangsu University from September 10th 2009 to June 30th 2011. In the experiment four kinds of nutrient solution with different EC were use to water cucumber and the EC value were 0.036 dS/m, 1.5, 2.2 and 2.5 dS/m, respectively. Moreover, photosynthesis rate, Chlorophyll fluorescence, Chlorophyll content and production with different EC were measured and relationship between among were analyzed. The result showed that electrical conductivity of nutrient solution had a great effect on value of SPAD, maximum photosynthesis rate, initial light use efficiency and electron transport rate of cucumber lower leaves in greenhouse. No significant difference was found between T3 treatment (EC=2.5 dS/m) and T2 treatment (EC=2.2 dS/m) about value of SPAD, maximum photosynthesis rate, initial light use efficiency, electron transport rate and production of Upper and Middle Leaves, but significantly bigger than T0 treatment (EC=0.036.5 dS/m) and T1 treatment (EC=1.5 dS/m). The experimental model among maximum photosynthesis rate and initial light use efficiency and soil plant analysis development of leaves were established. Relationship between photosynthesis rate and electron transport rate was described to power. This research can provide theoretic foundation to nutrient solution management based on leaves photosynthetic rate.
Number of references:22
Main heading:Greenhouse effect
Controlled terms:Chlorophyll - Efficiency - Electric conductivity - Electron transitions - Electron transport properties - Experiments - Geologic models - Greenhouses - Nutrients - Photosynthesis - Plants (botany) - Transport properties
Uncontrolled terms:Chlorophyll contents - Chlorophyll fluorescence - Cucumber - Electrical conductivity - Electron transport - Electron transport rate - Experimental models - Light use efficiency - Nutrient solution - Photosynthesis rate - Photosynthetic characteristics - Photosynthetic rate - Plant analysis
Classification code:931.3 Atomic and Molecular Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 913.1 Production Engineering - 901.3 Engineering Research - 804.1 Organic Compounds - 932 High Energy Physics; Nuclear Physics; Plasma Physics - 741.1 Light/Optics - 481.1 Geology - 461.9 Biology - 451 Air Pollution - 402.1 Industrial and Agricultural Buildings - 701.1 Electricity: Basic Concepts and Phenomena
DOI:10.3969/j.issn.1002-6819.2011.10.049
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514862
Title:High temperature compost of citrus pill residues to produce organic fertilizer
Authors:Zhao, Jian (1); Yuan, Ling (1); Huang, Jianguo (1); Li, Yong (1); Peng, Liangzhi (2)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing 400716, China; (2) Citrus Research Institute, Chinese Academy of Agricultural Sciences, Chongqing 400700, China
Corresponding author:Yuan, L.(Lingyuanh@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:270-276
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:There is a large amount of pill residues with high water content resulting in serious environment pollution in citrus processing for juice. Efficiently reducing pollution is thus very urgent. In the present experiment, citrus pill residues was mixed with ground wheat straws in various proportions and inoculated with thermal bacteria (Bacillus sp) decomposing pectin and cellulose. The main object is to develop a technique to treat citrus pill residues for organic fertilizer production and decontamination by high temperature compost and to test the effect of organic fertilizer by applying in flue-cured tobacco. It was found that the microbial groups and numbers were highest in compost at the beginning. They were lowest and only two group of bacteria, being identified as the inoculated thermophilic Bacillus sp decomposing pectin and cellulose, in high temperature period. The microbial groups increased again thereafter, but the numbers changed little or slightly increased in final stage as compared to high temperature period. In composting process, temperature raised quickly to 60-73°C and then decreased, which followed by constant linear reduction of water content. Nutrient contents in compost materials increased quickly (nitrogen) and constantly (phosphorus and potassium), and then nitrogen decreased slowly after reaching to the highest. pH value changed similarly as nitrogen, ranged from 4.04 to 4.94 in compost. During the fermentation, the color of citrus pill residues changed from yellow into light gray, dark gray or black. After 40 days fermentation with inoculation of thermophilic Bacillus sp decomposing pectin and cellulose, the compost materials fitted the national standard of organic fertilizer (NY525-2002). Water content decreased from 82.2% to 20.2%. The total nutrient (N P<inf>2</inf>O<inf>5</inf> K<inf>2</inf>O) reached to 4.57% and organic matter was as high as 66.5% in compost materials. The citrus pill residues changed into dark gray or black at the end of fermentation. Rational combination fertilization of 50% chemical fertilizer and 50% organic fertilizer produced from citrus pill residues could increase significantly the yields and improve the qualities of flue-cured tobacco in fertilizer efficiency test.
Number of references:35
Main heading:Composting
Controlled terms:Bacilli - Bacteriology - Cellulose - Curing - Fermentation - Fertilizers - Nitrogen - Nutrients - Phosphorus - Pollution - Potassium - Tobacco - Water content
Uncontrolled terms:Bacillus sp - Chemical fertilizers - Citrus pill residues - Citrus processing - Compost materials - Composting process - Environment pollution - Fertilizer efficiency - Flue-cured tobacco - High temperature - High water content - Linear reduction - Main objects - Microbial groups - National standard - Nutrient contents - Organic fertilizers - pH value - Thermophilic bacilli - Wheat straws
Classification code:815.1.1 Organic Polymers - 815.1 Polymeric Materials - 804 Chemical Products Generally - 549.1 Alkali Metals - 821.4 Agricultural Products - 461.9 Biology - 454.2 Environmental Impact and Protection - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 444 Water Resources - 461.8 Biotechnology
DOI:10.3969/j.issn.1002-6819.2011.10.048
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514821
Title:Automatic optimization of impeller meridional shape for centrifugal pumps based on CFD
Authors:Wang, Kai (1); Liu, Houlin (1); Yuan, Shouqi (1); Wu, Xianfang (1); Wang, Yong (1)
Author affiliation:(1) Research Center of Fluid Machinery Engineering and Technical, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Liu, H.(liuhoulin@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:39-43
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The design of impeller meridional shape influences directly efficiency of centrifugal pumps. A hydraulic optimum design method of impeller meridional shape for centrifugal pumps was presented. The shroud radius R<inf>0</inf> and R<inf>1</inf>, shroud angle T<inf>1</inf>, hub arc radius R<inf>2</inf> and hub angle T<inf>2</inf> on the meridional shape were selected as the optimum variables and the maximum of hydraulic efficiency was chosen as the objective function. The Isight software was used to integrate Pro/E, Gambit and Fluent, and the CFD automatic optimization of impeller meridional shape was realized. Optimal Latin hypercube experimental design method was used to produce data samples. A centrifugal pump with special speed of 84.8 was optimized with the method. The results show that the optimized head has increased by 4.85% than that of original design and the optimized hydraulic efficiency increases from 83.20% to 84.51% which improved 1.31 percentage points. Therefore, the automatic CFD optimum method of impeller meridional shape for centrifugal pumps is feasible and could provide a certain reference for optimum design of other pumps.
Number of references:13
Main heading:Pumps
Controlled terms:Centrifugal pumps - Design - Efficiency - Hydraulic machinery - Hydraulics - Impellers - Optimization - Pumping plants
Uncontrolled terms:Arc radius - Automatic optimization - Data sample - Experimental design method - Hydraulic efficiency - Latin hypercube - Meridional shape - Objective functions - Optimum designs - Optimum method - Original design - Percentage points
Classification code:913.1 Production Engineering - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 921.5 Optimization Techniques - 618.2 Pumps - 446 Waterworks - 408 Structural Design - 601.2 Machine Components
DOI:10.3969/j.issn.1002-6819.2011.10.007
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514827
Title:Design and performance test of ozone mixing ejector in fish recirculating culture
Authors:Cao, Guangbin (1); Jia, Huiwen (1); Jiang, Shuyi (1); Han, Shicheng (1); Chen, Zhongxiang (1)
Author affiliation:(1) Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Science, Heilongjiang Harbin 150076, China
Corresponding author:Cao, G.(laocao@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:73-78
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Ozone is a kind of effective disinfectant. When ozone is used in aquaculture water treatment, it must be dissolved in water. It is important to research ozone mixture equipment and dissolution technology for application of ozone in aquaculture. The present research concerned with the design, size parameters optimum and function measurement of ozone mixture equipment, and in structure design, ejector was used as a mixture parts and gas dissolving cane was used as dissolution component. Design method of Computation Fluid Dynamics (CFD) was utilized in 10 groups of ejector sizes, and the optimized main parameters of ejector were injecting coefficient as 0.7, injecting nozzle diameter as 23 mm, mixing tube diameter as 42 mm and tube length as 336 mm. Meanwhile, the performance of ozone mixture equipment was experimented, and ozone dissolution curve was obtained. Ozone could be dissolved easily and the ozone concentration of water could reach up to 0.15 mg/L. According to the experiment function of mixing, the quantity and concentration of ozone could be chosen in disinfecting water, destroying structure of organic substance, oxidizing ammonia, and condensing suspend substance.
Number of references:20
Main heading:Ozone water treatment
Controlled terms:Aquaculture - Design - Dissolution - Ejectors (pumps) - Equipment - Mixtures - Nozzle design - Ozone
Uncontrolled terms:Design method - Function measurements - Main parameters - Mixing tubes - Nozzle diameter - Organic substances - Ozone concentration - Ozone mixing - Performance tests - Size parameters - Structure design - Tube length
Classification code:408 Structural Design - 618.2 Pumps - 802.3 Chemical Operations - 804 Chemical Products Generally - 821.3 Agricultural Methods - 901 Engineering Profession
DOI:10.3969/j.issn.1002-6819.2011.10.013
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514879
Title:Process optimization of assisted extraction of water-soluble nucleotides from Agrocybe cylindracea by grind bead
Authors:Cheng, Cuilin (1); Wang, Zhenyu (1); Zhao, Haitian (1); Cui, Moli (1); Yao, Lei (1)
Author affiliation:(1) School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; (2) School of Forestry, Northeast Forestry University, Harbin 150040, China; (3) Agriculture Bureau of Xiangfen County of Shanxi Province, Linfen 041500, China; (4) National Research Centre of Soybean Engineering and Technology, Harbin 150030, China
Corresponding author:Wang, Z.(wzy219001@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:370-374
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 optimum conditions for extraction and separation of water-soluble nucleotide from fruit body of an edible fungus-Agrocybe cylindracea was studied. The crude nucleotides were assisted extraction with the grind bead. Three factors (grind time, ratio of liquid to solid, and loading capacity of grind beads) were investigated in the single-factor experiments. The process parameters were optimized by response surface analysis method. A multiple regression equation which was identified significant by regression analysis and the optimum extraction conditions were also determined (grind time: 12 min, ratio of liquid to solid: 51:1 mL/g, loading capacity of grind beads: 12.5%). The theoretical yield for nucleotide was 7.02%. Furthermore, the actual yield was 6.94%, which was in accordance with theoretical result and thereby illustrated the fitted multiple regression equation was credible. Compared with traditional methods, grind bead assisted extraction not only produced high yield of nucleotides, but also greatly shortened processing time, which provided an industrial reference for developing new processes of nucleotides production from edible fungi.
Number of references:24
Main heading:Solvent extraction
Controlled terms:Liquids - Nucleotides - Optimization - Regression analysis - Surface analysis
Uncontrolled terms:Agrocybe cylindracea - Extraction conditions - Fruit body - Grind bead - High yield - Loading capacities - Multiple regression equations - Optimum conditions - Process parameters - Processing Time - Response surface analysis - Response surface analysis methods - Theoretical result - Theoretical yield
Classification code:461.9 Biology - 802.3 Chemical Operations - 921.5 Optimization Techniques - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2011.11.065
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514869
Title:Landscape characteristics of rural residential consolidation potentiality in Xiyu, Pengzhou city
Authors:Zhou, Wei (1); Cao, Yingui (1); Wang, Jing (2)
Author affiliation:(1) School of Land Science and Technology, China University of Geosciences, Beijing 100083, China; (2) Land Key Laboratory of China Land Survey and Plan Institute, Beijing 100035, China
Corresponding author:Zhou, W.(zhouw@cugb.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:316-321
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 appraise landscape traits of rural residential land and analyze the relationship between integrated landscape index and theory potentiality, the paper took the rural residential land of Xiyu village as the research object, and constructed the appraisal index system from the rural residential land scale, land-use, distribution and shape with the method of landscape ecology. And integrated landscape trait and the contribution of sole landscape index to the integrated landscape trait was analyzed based on integrated landscape index and principal component analysis. The results showed that the proportion of land use was high and many groups were in the intensive areas, and the extent of intensiveness was impacted greatly by altitude and slope. The scales of many groups were large and the connection was compact, the shape was neat. The large residential land coexisted with small and scattered residential land. Integrated landscape trait was influenced by some landscape traits following the contribution ratio, it was important to develop the distribution and shape traits in order to improve the integrated landscape trait. The relationship was obvious between integrated landscape index and theory potentiality, which took on the trend of Parabola, that was, the bigger of integrated landscape index, the lower of the theory potentiality.
Number of references:17
Main heading:Principal component analysis
Controlled terms:Ecology - Integration - Land use - Rural areas
Uncontrolled terms:Appraisal index systems - Landscape characteristic - Landscape ecology - Landscape index - Potentiality - Principal Components - Research object
Classification code:403 Urban and Regional Planning and Development - 454.3 Ecology and Ecosystems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921.2 Calculus - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2011.10.055
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514838
Title:Statistics and tracking of Bactrocera Dorsalis based on machine vision
Authors:Wen, Tao (1); Hong, Tiansheng (1); Li, Zhen (1); Luo, Wenhui (3); Long, Xiuzhen (4); Chen, Haibin (3)
Author affiliation:(1) Key Laboratory of Key Technology for South Agricultural Machinery and Equipment, Ministry of Edu., Guangzhou 510642, China; (2) Machinery Laboratory of China Agriculture (Citrus) Research System, Guangzhou 510642, China; (3) College of Engineering, South China Agricultural University, Guangzhou 510642, China; (4) Institute of insect Entomology, 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:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:137-141
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:The number of Bactrocera Dorsalis in occurring period is the important parameter which threats the growth situation for fruit trees and is the basis of implementing variable rate technology. In order to realize detecting the occurrence of Bactrocera Dorsalis real-time and fasting in large-scale orchard, machine vision technologies based on moving object trace tracking were employed to trace Bactrocera Dorsalis behavies around traps real-time, so as to achieve statistics of their number into the hole precisely. The fore 50000 video image were selected as evaluation samples which collected in feed room of Resource and Environment College in South China Agricultural University using vision monitoring platform for Bactrocera Dorsalis. Through comparison of results with methods of artificial and machine vision detecting, the experiment indicated that the number of Bactrocera Dorsalis detected by artificial and machine vision were 85 heads and 78 heads, respectively. The loss rate of detecting using machine vision was 9.4%, which can meet the demands of pests' monitoring.
Number of references:15
Main heading:Computer vision
Controlled terms:Agricultural machinery - Orchards
Uncontrolled terms:Bactrocera Dorsalis - Fruit trees - Loss rates - Machine vision technologies - Monitoring platform - Moving objects - On-machines - Pests - Resource and environment - South China - Variable rate technology - Video image
Classification code:723.5 Computer Applications - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods
DOI:10.3969/j.issn.1002-6819.2011.10.024
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514850
Title:Rural living energy utilization and CO<inf>2</inf> emissions scenario analysis in China
Authors:Tian, Yishui (1); Zhao, Lixin (1); Sun, Liying (1); Meng, Haibo (1); Yao, Zonglu (1)
Author affiliation:(1) Chinese Academy of Agricultural Engineering, MOA, Beijing 100125, China
Corresponding author:Tian, Y.(yishuit@yahoo.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:206-211
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 energy use trend of rural residents and greenhouse gas emission potential, rural living energy demand and CO<inf>2</inf> emission in 2020 were simulated under three kinds of policy scenarios based on long-term energy alternative planning system (LEAP model). The results showed that the living energy demand of rural residents was about 295 to 375 million t in 2010, which showed an increasing tendency. If strong policy measures were taken, about 87 million t CO<inf>2</inf> emissions would be reduced. This study provides the basis for Chinese government to issue policy measures for addressing climate change and reducing greenhouse gas emission.
Number of references:29
Main heading:Carbon dioxide
Controlled terms:Computer simulation - Energy utilization - Gas emissions - Global warming - Greenhouse gases - Rural areas
Uncontrolled terms:Chinese Government - Emissions scenarios - Energy demands - Energy use - Planning systems - Policy measures - Policy scenario - Rural residents - Scenario analysis
Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 525.3 Energy Utilization - 723.5 Computer Applications - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2011.10.036
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514872
Title:Impact factors of air curtain performance in cold store
Authors:Nan, Xiaohong (1); He, Yuan (1); Liu, Lijun (2)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; (2) School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Corresponding author:Liu, L.(ljliu@mail.xjtu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:334-338
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 coupled global model of fluid flow and heat transfer was developed for a cold store in use. The convective heat transfer in the springhouse, the jet flow of the air curtain installed at the entrance and the environmental flow outside the cold store were solved together in a coupled way. The effects of the outlet width, the jet velocity and the jet angle of the air curtain on its performance and efficiency were numerically studied respectively under the condition that the air curtain and store gate opened simultaneously. The results showed that there existed an optimal value for the jet velocity and the jet angle at which the air curtain had the best performance and the highest efficiency. A large outlet width does not necessitate for better performance of an air curtain if it exceeds the critical value.
Number of references:12
Main heading:Air
Controlled terms:Air curtains - Cold storage - Doors - Flow of fluids - Heat convection
Uncontrolled terms:Cold stores - Convective heat transfer - Critical value - Environmental flow - Global models - Impact factor - Jet angle - Jet flow - Jet velocities - Optimal values
Classification code:402 Buildings and Towers - 641.2 Heat Transfer - 694.4 Storage - 804 Chemical Products Generally - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2011.10.058
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514815
Title:Urban sprawl control in China based on international comparison and strategy selection
Authors:Li, Xiaoshun (1); Qu, Futian (2); Zhang, Shaoliang (1); Wang, Yinghong (1)
Author affiliation:(1) Jiangsu Key Laboratory of Resources and Environmental Information Engineering, China University of Mining and Technology, Xuzhou 221116, China; (2) China Centre for Land Policy Research, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Qu, F.(Ftqu@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:1-10
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 select governance strategies for China urban sprawl control, the breakthrough point of this article is the characteristic of urban sprawl in China which is called the three unbalanced lines. According to the logic thread of "Literature Review-Theoretical Analysis-Strategy Selection", the foundation, premise and key for urban sprawl control were analyzed. The results show that, compared with the foreign urban sprawl which has mostly "the market" mark, and pays more attention to the quality enhancement and the ecological environment changes of the city, urban sprawl in China mostly reflects the mayor's intention and is more concerned about the urban function ascension and the influence of food security. Compared with foreign urban sprawl welfare and deficit, the urban sprawl in China contains sacrifice and loss. For our current conditions and the stages of development, the dissipative sprawl should be avoided firstly in the current urban control. The domestic and international experiences about the strategy selection have the same characteristic which is emphasis on space management. That is to say, urban sprawl situation should be controled through the expanded boundary designation and key resources protection. In China, there are three urban spatial expansion boundaries: ideal, moderate and limit, which are different from that of foreign countries. And moderate boundary becomes a rational and realistic choice for us currently.
Number of references:61
Main heading:Food supply
Uncontrolled terms:China - Government Failure - Strategy selection - Theoretical Proposition - Urban sprawl
Classification code:404.2 Civil Defense
DOI:10.3969/j.issn.1002-6819.2011.10.001
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514842
Title:Optimal selection and collocation of filter units in micro-irrigation system
Authors:Wang, Xinkun (1); Xu, Ying (1); Tu, Qin (1)
Author affiliation:(1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Wang, X.(xjwxk@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:160-163
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to reduce the manufacturing and operating cost of filter equipment in micro-irrigation, the mathematical models for the selection optimization of single-body filter and the configuration optimization of single-stage combination filter were established according to the combination pattern and working characteristic of the filters. The minimum annual cost was taken as the objective. Meanwhile the procedures and method for the equipment selection optimization and configuration of the filters were deduced. The case analyses demonstrated that the method was simple and practical, requiring fewer calculation parameters and easier to obtain the optimum solution. The annual cost of the single-body filter under the condition of optimized selection was reduced by 46.7% and that of the single-stage combination filter was decreased by 56.0% or 25.3%. The results in this work will provide a basis for the optimization and also the development and production of the filters in micro-irrigation. Beyond that it will help to cut down the manufacturing and operating cost of the micro-irrigation project and accelerate the development of the micro-irrigation technology.
Number of references:15
Main heading:Irrigation
Controlled terms:Cost reduction - Manufacture - Mathematical models - Operating costs - Optimization - Water supply
Uncontrolled terms:Annual cost - Calculation parameters - Case analysis - Combination filters - Configuration - Configuration optimization - Equipment selection - Filter unit - Microirrigation - Microirrigation systems - Optimal selection - Optimized selection - Optimum solution - Single stage - Type selection
Classification code:921.5 Optimization Techniques - 921 Mathematics - 911.2 Industrial Economics - 911.1 Cost Accounting - 821.3 Agricultural Methods - 537.1 Heat Treatment Processes - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2011.10.028
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514849
Title:Difference and evaluation model of soil anti-erodibility with different de-farming patterns
Authors:Zheng, Zicheng (1); Yang, Yumei (1); Li, Tingxuan (1)
Author affiliation:(1) College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China
Corresponding author:Li, T.(zichengzheng@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:199-205
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Soil anti-erodibility is one of the important parameters for evaluating the ability of soil resistance to soil erosion. Based on the comprehensive investigation on soil physical and chemical, and incorporated into bioindicator, the soil anti-erodibility was investigated with five de-farming patterns including conversion of farmland to Chinese fir plantation, conversion of farmland to eucalyptus plantation, conversion of farmland to loquat orchard, conversion of farmland to tea plantation and conversion of farmland to abandoned land by the method of field investigation and laboratory analysis on the hilly region of Western Sichuan in China. The results showed that all the 19 anti-erodibility indices could be optimized to 6 indices which were water-stable aggregates at size >0.25 mm, average weighted diameter, destructive rate of aggregates at size >0.25 mm, destructive rate of aggregates at size >0.5 mm, soil organic matter and acid phosphatase. The order of principal component analysis(PCA) comprehensive exponent of soil anti-erodibility followed that conversion of farmland to Chinese fir plantation > conversion of farmland to eucalyptus plantation > conversion of farmland to loquat orchard > conversion of farmland to tea plantation > conversion of farmland to abandoned land. Based on the 6 optimal indices of soil anti-erodibility, discriminant functions were established with different de-farming patterns. Discriminant functions included three levels of good, medium and poor soil anti-erodibility and total discriminant probability was 96.7%. So, three models could be used to evaluate soil anti-erodibility exactly in this area. The results can provide theory basis for improving index system of soil anti-erodibility and evaluating soil anti-erodibility of de-farming regions.
Number of references:25
Main heading:Geologic models
Controlled terms:Air pollution control - Chemical analysis - Erosion - Function evaluation - Investments - Optimization - Orchards - Phosphatases - Principal component analysis - Soils
Uncontrolled terms:Abandoned land - Acid phosphatase - Anti-erodibility - Bioindicator - Chinese fir - De-farming patterns - Discriminant functions - Eucalyptus plantations - Evaluation models - Field investigation - Index systems - Laboratory analysis - Soil erosion - Soil organic matters - Tea plantations - Three models - Western Sichuan
Classification code:922.2 Mathematical Statistics - 921.6 Numerical Methods - 921.5 Optimization Techniques - 911.2 Industrial Economics - 821.3 Agricultural Methods - 804 Chemical Products Generally - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 481.1 Geology - 451.2 Air Pollution Control - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2011.10.035
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514851
Title:Effect of turning and covering on greenhouse gas and ammonia emissions during the winter composting
Authors:Jiang, Tao (1); Schuchardt, Frank (3); Li, Guoxue (2)
Author affiliation:(1) College of Chemistry and Biology, Leshan Normal College, Leshan 614004, China; (2) College of Resources and Environment Sciences, China Agricultural University, Beijing 100094, China; (3) Johann Heinrich von Thuenen-Institute, Institute of Agricultural Technology and Biosystems Engineering, Bundesallee 50, 38116 Braunschweig, Germany
Corresponding author:Li, G.(ligx@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:212-217
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 effect of turning and covering on greenhouse gas and NH<inf>3</inf> emissions during the composting of pig faeces was evaluated in this paper. Chopped cornstalk was used as bulking agent and carbon source. Results showed that the heat created by the degradation would maintain the compost piles at thermophilic phases more than 3 weeks to ensure the sanitation effect. But the cold weather would freeze the pile when the degradable carbon was exhaust, then caused the maturation cease. About 0.14%-0.76% of initial carbon was lost as CH<inf>4</inf>, and the NH<inf>3</inf> and N<inf>2</inf>O emissions accounted the initial nitrogen 10.3%-29.5% and 0.81%-3.93% respectively. Statistic analysis showed that the turning could decrease the N<inf>2</inf>O and CH<inf>4</inf> emission, but increase the NH<inf>3</inf> losses significantly. Covering could increase the CH<inf>4</inf> production, decreased the NH<inf>3</inf> losses, but could not affect the N<inf>2</inf>O emission significantly.
Number of references:19
Main heading:Greenhouse effect
Controlled terms:Ammonia - Composting - Exhaust gases - Gas emissions - Global warming - Greenhouse gases - Piles
Uncontrolled terms:Ammonia emissions - Bulking agents - Carbon source - Cold weather - Compost pile - Covering - Statistic analysis
Classification code:408.2 Structural Members and Shapes - 451 Air Pollution - 451.1 Air Pollution Sources - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 804.2 Inorganic Compounds
DOI:10.3969/j.issn.1002-6819.2011.10.037
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514874
Title:Law of dielectric parameters and texture properties for grape during cold storage
Authors:Liu, Yaping (1); Liu, Xinghua (1); Li, Hongbo (3)
Author affiliation:(1) College of Food Science and Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China; (3) College of Engineering, Shanxi Agricultural University, Taigu 030801, China
Corresponding author:Liu, X.(liuxh2830@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:343-348
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:Dielectric parameters were non-destructively measured over frequency range from 0.1 kHz to 3980 kHz with a parallel-plate copper electrode and HIOKI 3532-50 LCR meter in order to study the law of dielectric and texture parameters of Red Globe grape during cold storage at 0°C. Firmness, chewiness, springiness and adhesiveness of grape were measured as texture attributes for correlation with the dielectric properties. The optimum frequency for dielectric properties test was identified and the regression equation was built. The results showed that fruit impedance, resistance, inductance and reactance decreased gradually by exponential form with the increase of frequency and 0.1 kHz was the optimum frequency for dielectric properties test. At the optimum test frequency, impedance, resistance, inductance and reactance decreased linealy with the extension of storage time. At the same time, firmness and chewiness decreased gradually with the time went on, springiness and the absolute value of adhesiveness went up contrarily. At 0.1 kHz frequency, the high correlation was found between dielectric and texture parameters, such as reactance with texture parameters (P<0.05). At last, the regression equation was built for dielectric and texture parameters, reactance could be used as sensitive dielectric parameter marking variations of texture properties.
Number of references:19
Main heading:Textures
Controlled terms:Cold storage - Correlation methods - Dielectric properties - Fruits - Inductance - Refrigerators
Uncontrolled terms:Absolute values - Copper electrodes - Dielectric parameters - Exponential form - Frequency ranges - LCR meters - Optimum frequency - Parallel plates - Red globe grape - Regression equation - Storage time - Test frequencies - Texture properties
Classification code:644.3 Refrigeration Equipment and Components - 701 Electricity and Magnetism - 701.1 Electricity: Basic Concepts and Phenomena - 821.4 Agricultural Products - 922.2 Mathematical Statistics - 933 Solid State Physics
DOI:10.3969/j.issn.1002-6819.2011.10.060
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514841
Title:Calculation of ecological basic flow of Weihe River based on basic flow ratio method
Authors:Wu, Xijun (1); Li, Huaien (1); Dong, Ying (2); Lin, Qicai (1)
Author affiliation:(1) Key Laboratory of Northwest Water Resources and Ecological Environment of Ministry of Education, Xi'an University of Technology, Xi'an 710048, China; (2) Department of Construction Engineering, Yulin College, Yulin 719000, China
Corresponding author:Li, H.(huaienl@yahoo.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:154-159
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To make the ecological basic flow better reflect river life water demand inter-annual and years change in the north of China, the basic flow ratio method was proposed, which divided long-term runoff statistical data into different hydrological years such as wet, normal, dry and special dry. By using traditional methods to determine the basic flow ratio of a certain hydrological year and counting the ratio of average runoff between this hydrological year and other years, the relationship between each basic flow ratio could be ascertained. Thus, the basic flow ratio of other hydrological years and ecological basic flow values could be calculated. Also, the value of ecological basic flow could be calculated for different periods in a year respectively. Taking mainstream of Weihe river in Baoji section as an example, the ecological basic flow was calculated based on basic flow ratio method. The results showed that the ecological basic flow for different hydrological years and periods calculated with this method was 5.00-36.00 m3/s. Results of other methods, such as Tennant and Texas method, were in this scope and guarantee degree of every hydrological year could reach 90%. This method could be applied to calculating the river ecological basic flow in northern China.
Number of references:19
Main heading:Ecology
Controlled terms:Rivers - Runoff
Uncontrolled terms:Basic flow - Guarantee degree - Hydrological years - Interannual - Northern China - Statistical datas - Water demand
Classification code:407.2 Waterways - 444.1 Surface Water - 454.3 Ecology and Ecosystems
DOI:10.3969/j.issn.1002-6819.2011.10.027
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514840
Title:Ecological design of irrigation and drainage ditches in agricultural land consolidation
Authors:Ye, Yanmei (1); Wu, Cifang (1); Yu, Jing (1)
Author affiliation:(1) Institute of Land Science and Real Estate, Zhejiang University, Hangzhou 310029, China
Corresponding author:Ye, Y.(yeyanmei@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:148-153
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Inappropriate design of ditch in agricultural land consolidation can degenerate habitat and affect the stability of agricultural ecosystem. So it is essential to develop ecological design technologies of the irrigation systems to simultaneously maintain irrigation functionality, ecological quality and economic gains. This article illustrates a case study of NADPA in Xiaohu Town of Fujian Province and describes how to develop principles and technological key points of ecological design of irrigational ditches. The result of ecological design of irrigational ditches in NADPA shows that the key to the ecological design of irrigational ditches in agricultural land consolidation is to implement the following ten technological improvements: design of gentle incline, combination of cement concrete and stone, plate molding concrete revetment, ecological cavern settings, deep groove, compound cross section, half-ecological concrete ditches, GCL ditches, modified impermeable concrete block ditches with vegetation form, animal escaping slope and design of frog nursing. In addition, the ecological design of ditches must give attention to both water conveyance efficiency and ecological functions, take consideration of nursing of frogs and other animals when the depth of ditch reach 1 meter and side slopes are vertical, and set stepped eco-plates to build animal escaping slopes. Evaluation of this project shows that ecological design of ditches has favorable quality in terms of ecology, economy and social continuity.
Number of references:15
Main heading:Design
Controlled terms:Animals - Concrete blocks - Economics - Ecosystems - Irrigation - Nursing - Water management
Uncontrolled terms:Agricultural ecosystems - Agricultural land - Cement concrete - Consolidiation - Cross section - Deep groove - Drainage ditches - Ecological design - Ecological functions - Ecological quality - Economic gains - Fujian Province - Irrigation systems - Irrigational ditches - Keypoints - Side slope - Technological improvements - Water conveyance
Classification code:971 Social Sciences - 822 Food Technology - 821.3 Agricultural Methods - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 814 Leather and Tanning - 471 Marine Science and Oceanography - 461.7 Health Care - 461 Bioengineering and Biology - 454.3 Ecology and Ecosystems - 446 Waterworks - 444 Water Resources - 412 Concrete - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2011.10.026
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514867
Title:Evaluation methods and application of land consolidation
Authors:Gao, Mingxiu (1); Zhang, Qin (3); Zhao, Gengxing (2)
Author affiliation:(1) Office of Sdauweekly, Shandong Agricultural University, Tai'an 271018, China; (2) College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China; (3) Daiyue Substation of Tai'an Bureau of Land and Resources, Tai'an 271000, China
Corresponding author:Zhao, G.(zhaogx@sdau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:300-307
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 coupling relationship between land consolidation (LC) and countryside construction, the connotation, research methods, index system and mathematical model of land consolidation efficiency (LCE) were proposed. And took 5 land consolidation projects (LCPs) of Daiyue District as examples, combined analytic hierarchy process(AHP), comprehensive evaluation method, geographic information system (GIS) technology, LCE were studied. The results indicated that the LCE of 23 countries in the 5 LCPs could be divided into 4 types: high efficiency, sub-high efficiency, moderate efficiency and low efficiency. There are complex positive correlation between investment and LCE: the values of LCE show an order of "national > provincial > city (District)" at the project level, and the larger the total investment and the scale, the larger the value of LCE at the village level. Our study derived desired results, which may provide scientific basis for evaluating and harmonizing the coupling relationship between LC and the new countryside construction, and promoting the sustainable development of LC and new countryside construction.
Number of references:28
Main heading:Efficiency
Controlled terms:Economics - Geographic information systems - Hierarchical systems - Investments - Mathematical models
Uncontrolled terms:Comprehensive evaluation - Connotation - Consolidation projects - Evaluation Method - High efficiency - Index systems - Land consolidation efficiency - Positive correlations - Project levels - research methods - Total investment
Classification code:723.3 Database Systems - 911.2 Industrial Economics - 913.1 Production Engineering - 921 Mathematics - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2011.10.053
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514881
Title:Aqueous enzymatic extraction of pumpkin seed oil and its physical-chemical properties
Authors:Wang, Libo (1); Xu, Yaqin (1); Yang, Yu (1); Sun, Xin (1)
Author affiliation:(1) College of Science, Northeast Agricultural University, Harbin Heilongjiang 150030, China
Corresponding author:Xu, Y.(xu-yaqin@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:383-387
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 get high quality oil from naked pumpkin seeds, aqueous enzymatic technology has been developed. Single factor experiment and orthogonal experiment were applied to optimize the best extraction conditions. Some of the physicochemical properties of the extracted oil were analyzed. The optimum extraction conditions were determined when proportion of complex enzyme(acidic proteinase: cellulase: pectinase), dosage of complex enzyme, pH value, temperature of enzymatic hydrolysis and extraction time were 1:6:6, 1.2%, 4.0, 48°C and 3 h, respectively. Under optimized conditions, the oil yield of 38.34% was obtained between in the oil yield of 32.90% and 44.60% using supercritical carbon dioxide and ultrasonic extraction. The oil using aqueous enzymatic technology was rich in unsaturated fatty, phytosterol and vitamin E with the color of oil light-colored and transparent. And other physicochemical properties of oil using aqueous enzymatic technology were also superior to oil using other technologies. These results indicate that aqueous enzymatic technology had a good applying prospect in oil extraction industry.
Number of references:17
Main heading:Enzymatic hydrolysis
Controlled terms:Carbon dioxide - Chemical properties - Experiments - Oils and fats - Optimization - Seed - Supercritical fluid extraction - Technology
Uncontrolled terms:Applying prospect - Aqueous enzymatic extraction - Complex enzyme - Enzymatic technology - Extraction conditions - Extraction time - High quality - Light-Colored - Oil extraction - Oil yield - Optimized conditions - Orthogonal experiment - Pectinases - pH value - Physicochemical property - Pumpkin seed oil - Supercritical carbon dioxides - Ultrasonic extraction - Vitamin-E
Classification code:921.5 Optimization Techniques - 901.3 Engineering Research - 901 Engineering Profession - 821.4 Agricultural Products - 804.2 Inorganic Compounds - 804.1 Organic Compounds - 802.3 Chemical Operations - 802.2 Chemical Reactions - 801.2 Biochemistry - 801 Chemistry - 423 Non Mechanical Properties and Tests of Building Materials
DOI:10.3969/j.issn.1002-6819.2011.10.067
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514861
Title:Experimental study on effect of separated two-phase anaerobic fermentation leachate recirculation on anaerobic process
Authors:Gao, Xinxing (1); Zhao, Lixin (1); Dong, Baocheng (1); Chen, Ling (1); Wan, Xiaochun (1); Luo, Juan (1)
Author affiliation:(1) Chinese Academy of Agriculture Engineering, Beijing 100125, China
Corresponding author:Zhao, L.(zhaolixin5092@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:266-269
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To study the influence of separated two-phase anaerobic fermentation leachate recirculation on anaerobic process, the equipment was developed to simulate the leachate recirculation between the two phases. The gas production performance with leachate recirculation under two reflux modes of spray and immersion was comparative analyzed, including leachate pH, VFA (volatile fatty acids) and changes in composition and their influences on gas production. And the TS gas production per unit material under the two reflux modes was calculated. The, test results showed that in the separated two-phase anaerobic fermentation process, the system had better gas production performance and stability under immersion mode of leachate recirculation, its cumulative gas production was two times than that with spray mode, the TS gas production per unit material mass was up to 217.88 mL/g.
Number of references:14
Main heading:Volatile fatty acids
Controlled terms:Biogas - Fermentation - Gases - Leaching - Sewage
Uncontrolled terms:Anaerobic fermentation - Biogas production - Leachates - Organic wastes - Recycle - Separated two-phase
Classification code:452.1 Sewage - 522 Gas Fuels - 533.1 Ore Treatment - 802.2 Chemical Reactions - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2011.10.047
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514859
Title:Characteristics of high-solids anaerobic co-fermentation for converting food waste and excess sludge to biogas
Authors:Zhao, Yunfei (1); Liu, Xiaoling (2); Li, Shizhong (2); Ruan, Wenquan (1); Liu, Jianshuang (2); Tian, Meng (2)
Author affiliation:(1) College of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China; (2) Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Corresponding author:Li, S.(szli@mail.tsinghua.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:255-260
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:Evaluation of high-solids anaerobic co-fermentation of food waste and excess sludge was conducted in laboratory scale, which operated at mesophilic (35°C±1°C) and high-solids (12% total solids) conditions. The effects of mixing ratios on biogas conversion and rate-limiting steps of high-solids anaerobic co-fermentation were discussed. Results showed that compared with other mixing ratios, a mixture ratio of 30:30 could obviously enhance the anaerobic efficiency of biogas production, and the cumulative biogas yield, cumulative methane yield, biodegradability as well as VS removal rate increased to 612 mL/gVS, 327 mL/gVS, 76.9% and 63.6%, respectively. Moreover, it was found that volatile fatty acids were mainly inhibition factor of multi-food waste case. The biogas production rate exhibited a rapid increase in earlier 5 days of co-fermentation, but the content of methane was still below 60% throughout the high-solids anaerobic co-fermentation. As far as the case of multi-sewage sludge, the peaks of biogas production rate were obtained from the 10th to the 25th day. It was also observed that methane content rapidly increased to 50% in earlier five days and then stabilized at approximately 70%.
Number of references:27
Main heading:Biogas
Controlled terms:Anaerobic digestion - Biodegradation - Fermentation - Methanation - Methane - Sewage sludge - Volatile fatty acids
Uncontrolled terms:Biogas production - Cofermentation - Excess sludge - Food waste - High-solids - Laboratory scale - Mesophilic - Methane content - Methane Yield - Mixing ratios - Mixture ratio - Rate-limiting steps - Removal rate - Total solids
Classification code:452.2 Sewage Treatment - 522 Gas Fuels - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds
DOI:10.3969/j.issn.1002-6819.2011.10.045
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514832
Title:Monitoring crop growth based on assimilation of remote sensing data and crop simulation model
Authors:Liu, Feng (1); Li, Cunjun (1); Dong, Yingying (1); Wang, Qian (1); Wang, Jihua (1); Huang, Wenjiang (1)
Author affiliation:(1) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) School of Geography, Beijing Normal University, Beijing 100875, China
Corresponding author:Li, C.(licj@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:101-106
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:Remote sensing observation and crop growth model simulation are two effective ways for crop growth monitoring, and they can well complement each other. Establishing assimilation system of remote sensing data and crop growth model is an interesting research field. Assimilation involves multidisciplinary integration, so it is necessary to construct a basic assimilation system integrated with models, algorithms and datasets of many kinds to reduce the difficulty of research and applications of data assimilation. In this study, in order to establish the assimilation system prototype of crop growth model and remote sensing data, modular design was used to realize the combination of CERES-Wheat model, very fast simulated annealing algorithm and remote sensing data. Ground hyper-spectral data was chosen as remote sensing data, and the system was tested and preliminarily applied to estimate wheat LAI. The results show that the assimilated LAI can well agree with the measured LAI, and the assimilation system established is feasible. The assimilation system can provide a platform for the basic research and application of the coupling of remote sensing data and crop growth model.
Number of references:17
Main heading:Computer simulation
Controlled terms:Algorithms - Crops - Data processing - Remote sensing - Research - Simulated annealing
Uncontrolled terms:Assimilation system - Crop growth model - Fast simulated annealing - Hyperspectral Data - Leaf Area Index
Classification code:723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 821.4 Agricultural Products - 901.3 Engineering Research - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2011.10.018
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514830
Title:LAI inversion of spring wheat based on PROBA/CHRIS hyperspectral multi-angular data and PROSAIL model
Authors:Yang, Guijun (1); Zhao, Chunjiang (1); Xing, Zhurong (1); Huang, Wenjiang (1); Wang, Jihua (1)
Author affiliation:(1) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Yang, G.(guijun.yang@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:88-94
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Leaf area index (LAI) is an important parameter of vegetation ecosystems, which can represent the growth situation of vegetation. The PROBA(project for onboard autonomy)/CHRIS(compact high resolution imaging spectrometer) data acquired in June 4, 2008 was used to inverse LAI of spring wheat combing with the radiative transfer model (PROSAIL) and ANN(artificial neural network), and to validate the results according to the in-situ measurements. The optimal bands were selected using segmented principal component analysis. Three bands (center wavelength 551.1 nm, 696.9 nm and 871.5 nm, respectively) were finally used to inversion of LAI. The selected combination of three observation angles (0°, 36° and 55°) shows high accuracy inversion LAI with R2=0.854, RMSE=0.344, MAE=0.213. The accuracy of inversion LAI can be improved with increasing the number of observation angle. However, if the number of angles is more than three, the accuracy will conversely decrease because of the uncertainty augment of multi-angle data.
Number of references:20
Main heading:Neural networks
Controlled terms:Principal component analysis - Radiative transfer - Remote sensing - Vegetation
Uncontrolled terms:Artificial Neural Network - Inversion - LAI - PROBA/CHRIS - PROSAIL - Spring wheat
Classification code:701 Electricity and Magnetism - 723.4 Artificial Intelligence - 731.1 Control Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2011.10.016
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514858
Title:Simulation experiment of volatility organic acids on biogas-producing characteristics under anaerobic condition
Authors:Dong, Baocheng (1); Zhao, Lixin (1); Wan, Xiaochun (1); Luo, Juan (1); Chen, Ling (1); Gao, Xingxin (1)
Author affiliation:(1) Chinese Academy of Agricultural Engineering, Beijing 100125, China
Corresponding author:Wan, X.(xchunw1123@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:249-254
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:Two-phase anaerobic biological treatment has been widely applied in waste disposal/utilization. In order to study the effects of main products on the biogas-producing process, based on the simulation of four major acidified organic acids (formic acid, acetic acid, propionic acid and butyric acid), the activated sludge was inoculated. Then single factor and orthogonal experiments were designed to study the main and interactive effects of organic acids on dynamics of both daily and accumulative methane production under medium temperature condition. The results showed that there existed a critical threshold of organic acid concentration in single organic acid, where high concentration above the threshold would have inhibited effect on gas production; and gas production got increased with the acid concentration increasing when it below the threshold. There was a significant interactive effect among the four organic acids, and acetic acid had the stronger increasing effect than butyric acid, propionic acid had the constrained effect. Acetic acid had best effect on gas production among the four organic acids under same concentration. Formic acid got the highest gas yield and had less inhibiting effect than propionic acid. It is suggested that the fermented material concentration, which easily produce organic acids, should be adjusted in order to improve gas production efficiency.
Number of references:16
Main heading:Butyric acid
Controlled terms:Acetic acid - Activated sludge process - Anaerobic digestion - Biogas - Concentration (process) - Experiments - Formic acid - Gases - Leaching - Methane - Organic acids - pH - Saturated fatty acids - User interfaces
Uncontrolled terms:Acid concentrations - Activated sludge - Anaerobic conditions - Biological treatment - Critical threshold - Gas productions - Gas yields - High concentration - Increasing effect - Inhibiting effect - Interactive effect - Leachates - Medium temperature - Methane production - ON dynamics - Organic acid concentration - Orthogonal experiment - Propionic acids - Simulation experiments
Classification code:901.3 Engineering Research - 804.1 Organic Compounds - 802.3 Chemical Operations - 931.2 Physical Properties of Gases, Liquids and Solids - 802.2 Chemical Reactions - 722.2 Computer Peripheral Equipment - 522 Gas Fuels - 801.1 Chemistry, General
DOI:10.3969/j.issn.1002-6819.2011.10.044
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514855
Title:Thermal performance of solar water heater hanged on balcony wall with separate pressure bearing
Authors:Ding, Xiang (1); Gao, Wenfeng (1); Liu, Tao (1); Lin, Wenxian (1)
Author affiliation:(1) Key Lab. of Advanced Technique and Preparation for Renewable Energy Materials, Solar Energy Research Institute, Yunnan Normal University, Kunming 650092, China
Corresponding author:Gao, W.(wenfenggao@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:233-237
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, an analysis has been conducted on an indirect forced circulation solar water heater which is hanged on the balcony wall with separate pressure bearing, a mathematical model was established for this heater, and experiments and calculations have been carried out to obtain the useful heat, daily average thermal efficiency, transient thermal efficiency, heat loss coefficient of the heater, etc., under clear day conditions in winter in Kunming, China. The results show that the thermal performance of such a solar heater is superior, it meets the requirements of the national standards and the residential water usage, and is suitable for utilization integrated with buildings; Solar radiation is the most profound parameter to dictate the thermal performance of the heater; The insulation performance of the storage tank with separate pressure bearing is superior. Nevertheless, the results also demonstrate that further studies are needed to explore in-depth the temperature stratification in the heat storage tank.
Number of references:15
Main heading:Mixed convection
Controlled terms:Bearings (structural) - Heat losses - Heat storage - Heating equipment - Mathematical models - Solar heating - Solar radiation - Solar water heaters - Sun - Tanks (containers) - Walls (structural partitions)
Uncontrolled terms:Heat loss coefficients - Heat storage tanks - Indirect forced circulation - Insulation performance - National standard - Separate pressure bearing - Solar heater - Storage tank - Temperature stratification - Thermal efficiency - Thermal Performance - Transient thermal efficiency - Useful heat - Water usage
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 657.1 Solar Energy and Phenomena - 642.2 Industrial Furnaces and Components - 921 Mathematics - 641.2 Heat Transfer - 408.2 Structural Members and Shapes - 402 Buildings and Towers - 619.2 Tanks
DOI:10.3969/j.issn.1002-6819.2011.10.041
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514837
Title:Temperature and humidity distributed monitoring for grain depot based on RFID reader networks
Authors:Yuan, Jiang (1); Cao, Jinwei (1); Qiu, Zixue (1)
Author affiliation:(1) School of Mechanical Engineering, Nantong University, Nantong 226019, China
Corresponding author:Qiu, Z.(qiu.zx@ntu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:131-136
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:As the monitoring system for grain depot has the characteristics of multiple measuring points, far transmit distance, poor expansion and hardly mobility, a new method using three layer reader networks for wireless monitoring the temperature and humidity of grain depot was proposed. A sensor-tag integrated with the sensor SHT75, the microcontroller MSP430F149 and the RF communication module NRF905 was designed. The temperature and humidity signals of the grain depot were acquired by sensor-tag, packaged with the current time and the address code information by front-side reader, and transmitted wirelessly to the terminal reader and control center by relay readers. The experimental results show that the system has the characteristics of good expansibility, long transmit distance(≥128 m), simple routing and easy positioning.
Number of references:20
Main heading:Monitoring
Controlled terms:Humidity control - Network layers - Sensors
Uncontrolled terms:Address code - Control center - Distributed monitoring - Grain depot - Grain storage - Measuring points - Monitoring system - MSP430F149 - Reader - RF communication modules - RFID readers - Sensor-tag - Three-layer - Wireless monitoring
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 801 Chemistry - 723 Computer Software, Data Handling and Applications - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2011.10.023
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514819
Title:Finite element analysis on damage of rice kernel impacting on spike tooth
Authors:Xu, Lizhang (1); Li, Yaoming (1)
Author affiliation:(1) Key Lab. of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, High-Tech. Key Lab. of Agricultural Equipment and Intelligentization of Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Xu, L.(justxlz@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:27-32
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A computer-aided design model of a rice kernel comprising three layered ellipsoids was established. HyperMesh software was used to partition mesh cells and set material and contact parameters for each cell and thus construct a finite element model for analysis. Using LS-DYNA software, the impact process between the spike-tooth and the rice kernel was simulated and analyzed. The simulation showed that the contact zone between the spike-tooth and the rice kernel was elliptic, and the compressive stress was a maximum at the center of the contact zone. The von Mises stress value of rice seed skin and endosperm gradually increased with the increase of impact velocity. The critical damage velocity for the kernel corresponding to the endosperm critical von Mises stress was 24.2 m/s, while the critical damage velocity of the correspondent rice seed skin was much larger.
Number of references:15
Main heading:Finite element method
Controlled terms:Agriculture - Computer aided analysis - Computer aided design - Computer graphics - Grain (agricultural product) - Stresses
Uncontrolled terms:Damage - Finite Element - Impact - Rice kernels - Threshing
Classification code:421 Strength of Building Materials; Mechanical Properties - 723.5 Computer Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2011.10.005
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514860
Title:Effects and countermeasures of CO<inf>2</inf> content in biogas on performance of biogas stove
Authors:Dai, Wanneng (1); Qin, Chaokui (1); Yang, Xianchao (1); Ma, Fei (1)
Author affiliation:(1) College of Mechanical Engineering, Tongji University, Shanghai 201804, China
Corresponding author:Qin, C.(chkqin@mail.tongji.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:261-265
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The thermal performance of a typical domestic biogas stove supplied with biogas of different CO<inf>2</inf> volume fractions was investigated. Possible technical measures in response to variations in biogas composition were studied as well. Mixed gas of natural gas and CO<inf>2</inf> were produced so as to simulate the biogas in which CO<inf>2</inf> volume fraction varied from 50% to 30%. With the decrease of CO<inf>2</inf> percentage in the mixture, it was found that heat output, heat efficiency and CO emission increased, while NO<inf>x</inf> emission did not change significantly. When heat output was greater than 3.26 kW, the current testing method could not reflect the relationship between thermal efficiency and CO<inf>2</inf> ratio exactly. Variations in the CO<inf>2</inf> content in biogas significantly affected the thermal performance of the biogas stove, which maight increase complaints and security risks. When the volume fraction of CO<inf>2</inf> was less than 40%, regulating the biogas pressure according to the CO<inf>2</inf> content so as to stabilize heat output could significantly improve the CO emission, which may be regarded as a measure to cope with variations of CO<inf>2</inf> content in biogas.
Number of references:30
Main heading:Carbon dioxide
Controlled terms:Biogas - Mixed convection - Titration - Volume fraction
Uncontrolled terms:Biogas composition - CO emissions - Current testing - Heat efficiency - Heat output - Mixed gas - Security risks - Technical measures - Thermal efficiency - Thermal performanc - Thermal Performance
Classification code:522 Gas Fuels - 641.1 Thermodynamics - 641.2 Heat Transfer - 801 Chemistry - 804.2 Inorganic Compounds
DOI:10.3969/j.issn.1002-6819.2011.10.046
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514835
Title:Quantitative retrieval and classification of saline soil using HJ-1A hyperspectral data
Authors:Yang, Jiajia (1); Jiang, Qigang (1); Zhao, Jing (2); Wu, Yangchun (1)
Author affiliation:(1) College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China; (2) Institute of Remote Sensing Applications, Chinese Acad. of Sci., Beijing 100101, China
Corresponding author:Jiang, Q.(jiangqigang@jlu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:118-124
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 effectively control the saline soil, taking Songliao Basin for example, the Environmental Mitigation Satellite (HJ-1A) hyperspectral data was used in this study. The most suitable quantitatively retrieve model of saline soil was selected by comparing the forecast results of the salt-bearing rate content retrieved by curvilinear regression and least squares support vector machine (LS-SVM) regression. Ultimately, LS-SVM regression was chosen to retrieve various saline soil indexes in Daqing where the soil was salinized seriously. The retrieve results were classified into several grades by binary decision tree. The results showed that, it was convenient and effective to acquire the saline soil information by using HJ-1A. The accuracy of retrieve model based on LS-SVM was high. The saline soil grade classification, which was calculated by binary decision tree using the RS technology, was accurate and reliable. Soil salinization of Daqing was serious, most of that was alkali soil. The area of light, medium and server alkali soil was separately 345.03, 1389.03, 869.94 km2, respectively. The research has great significance for saline soil rapid extracting and prevention in Songliao Basin.
Number of references:19
Main heading:Geologic models
Controlled terms:Decision trees - Plant extracts - Regression analysis - Remote sensing - Soils
Uncontrolled terms:Binary decision trees - Daqing - Environmental mitigation - Hyperspectral Data - Least squares support vector machines - LS-SVM - Model-based OPC - Saline soil - Soil salinization - Songliao basin - Songliao Plain
Classification code:961 Systems Science - 922.2 Mathematical Statistics - 922 Statistical Methods - 731.1 Control Systems - 483.1 Soils and Soil Mechanics - 481.1 Geology - 461.9 Biology
DOI:10.3969/j.issn.1002-6819.2011.10.021
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514822
Title:Analysis on pressure fluctuation of unsteady flow in deep-well centrifugal pump
Authors:Zhou, Ling (1); Shi, Weidong (1); Lu, Weigang (1); Li, Hui (1); Pei, Bing (1)
Author affiliation:(1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Shi, W.(wdshi@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:44-49
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to analysis the pressure fluctuation of unsteady flow in the deep-well centrifugal pump, the unsteady flow field of a deep-well centrifugal pump was simulated with FLUENT software based on sliding mesh, the standard k-Ε turbulence model, and the SIMPLEC arithmetic to investigate the pressure fluctuation of different locations. With the Fast Fourier Transform (FFT) analysis, the pressure fluctuation and frequency fluctuation are analyzed under rated flow conditions. The numerical results show that the grids number has obvious effect on the numerical results, and the pressure fluctuates generated between the impeller outlet and the diffuser inlet. The pressure pulsation period associated with the number of impeller blades, and blade passage frequency is the main factor of pressure fluctuation. The results can provide a basis to improve the pump body structure and further improve the pump working reliability.
Number of references:15
Main heading:Pumps
Controlled terms:Aerodynamics - Centrifugal pumps - Fast Fourier transforms - Hydraulic machinery - Impellers - Numerical analysis - Pressure effects - Pumping plants - Turbulence models - Unsteady flow
Uncontrolled terms:Blade passage frequency - Body structure - Flow condition - FLUENT software - Frequency fluctuation - Impeller blades - Impeller outlet - Numerical results - Pressure fluctuation - Pressure pulsation - SIMPLEC - Sliding mesh
Classification code:931.1 Mechanics - 921.6 Numerical Methods - 921.3 Mathematical Transformations - 651.1 Aerodynamics, General - 632.2 Hydraulic Equipment and Machinery - 631.1 Fluid Flow, General - 618.2 Pumps - 601.2 Machine Components - 446 Waterworks
DOI:10.3969/j.issn.1002-6819.2011.10.008
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514873
Title:Effect of moisture content on rape harvest logistics losses under different harvest methods
Authors:Liu, Dejun (1); Zhao, Xiurong (1); Gao, Lianxing (1); Srensen, C.G. (2)
Author affiliation:(1) College of Engineering, Shenyang Agricultural University, Shenyang 110866, China; (2) Department of Bio-System Engineering, Aarhus University, Foulum Research Centre, DK-8830, Denmark
Corresponding author:Zhao, X.(zhaoxiurongxr@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:339-342
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Rape harvest logistics loss is an important factor in the cost of production, the impact of rapeseed moisture content on the three main losses in single-step harvest and in multi-step harvest was studied in Foulum Research Centre of Denmark, and functions between moisture content and three main losses as well as total loss were established, and the effect of straw moisture content on harvest logistics loss was also investigated. The results show that with the lower moisture content, threshing loss and cleaning loss reduce, but too lower moisture content will increase the cutting header loss. The relationship between the total losses and moisture contents is significantly CUBIC function; In different moisture contents, the average losses of combine harvesting and multi-steps harvesting were respectively 16.358% and 18.771 and the former is less 2.4% than the latter; the minimum value of header loss is 0.976% in the three main losses and the average header loss is lower than the threshing loss and cleaning loss; The effect of straw moisture content on straw harvest logistics loss is not significant.
Number of references:13
Main heading:Harvesting
Controlled terms:Moisture - Moisture determination - Oilseeds
Uncontrolled terms:Average loss - Cost of productions - Cubic function - Denmark - Harvest - Harvest logistics - Minimum value - Moisture contents - Multi-step - Rapeseed - Research centres - Single-step - Total loss
Classification code:801.4 Physical Chemistry - 821.3 Agricultural Methods - 821.4 Agricultural Products - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2011.10.059
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514824
Title:Performance analysis on miniature lithium bromide shield pump based on numerical simulation
Authors:Kong, Fanyu (1); Qiu, Ning (1); Gao, Cuilan (2); Zhou, Shuiqing (1)
Author affiliation:(1) Technology and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China; (2) Shanghai Apollo Machinery Co. Ltd., Shanghai 201401, China
Corresponding author:Kong, F.(Kongfy2918@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:56-60
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:Existing single grade lithium bromide shield pump has the disadvantages of low efficiency and high energy consumption, so the research and development of two-stage miniature lithium bromide shield pump is important. Integrated motor and pump structure of two-stage miniature lithium bromide shield pump and its hydraulic components were designed. The design of hydraulic components included impeller design, combination design of radial diffuser and spiral volute, etc. FLUENT software was used to simulate the flow field of two-stage centrifugal pump. From the distribution of internal flow field, the performance values were predicted and compared with the design values when lithium bromide and water were respectively chosen as the medium. The prototype tests were carried out, and the results showed that the performance of two-stage miniature lithium bromide shield pump was better than the existing single stage one. The simulation values of the two-stage shield pump are close to the test values, which primarily validated that the simulation is credible and the design method is feasible.
Number of references:17
Main heading:Pumps
Controlled terms:Bromine compounds - Centrifugal pumps - Computer simulation - Design - Energy utilization - Flow fields - Hydraulic equipment - Hydraulic machinery - Hydraulics - Lithium
Uncontrolled terms:Combination design - Design method - Design value - Experimental analysis - FLUENT software - High energy consumption - Hydraulic components - Impeller design - Internal flow field - Lithium bromide - Miniature lithium bromide shield pump - Performance analysis - Performance prediction - Performance value - Prototype tests - Pump structure - Radial diffuser - Research and development - Single stage - Two stage
Classification code:804.1 Organic Compounds - 723.5 Computer Applications - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 631.1 Fluid Flow, General - 618.2 Pumps - 549.1 Alkali Metals - 525.3 Energy Utilization - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2011.10.010
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514826
Title:Design and experiment of mechanized harvest system for fishpond
Authors:Jiang, Tao (1); Xu, Hao (1); Tan, Wenxian (2); Zhang, Xun (3); Xu, Zhiqiang (1); Xu, Zhongwei (2); Wang, Zhiyong (2); Chen, Zhixin (1)
Author affiliation:(1) Key Laboratory of Fishery Equipment and Engineering, Ministry of Agriculture, Shanghai 200092, China; (2) Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, China; (3) East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
Corresponding author:Jiang, T.(jiangtao@fmiri.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
Pages:68-72
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To solve the problem of pond harvest work entirely depending on manpower nowadays, a mechanized harvest system for fishpond was developed. This system was designed by locating steel wire rope on both sides of the pond to guide netting gear, making use of hydraulic winch and trawl apparatus to accomplish the continuous trawl. According to the mechanical trawl experimentation carried out in the pond sized 50 m×100 m, the result showed that the velocity of trawl was 10 m/min, and the number of trawl staffs were reduced from 12 to 5, the efficiency of trawl fishing was approximately 64.8%. It was concluded that this system can reduce the number of labors, run smoothly, and it is applicable for all kinds of harvesting operations in rectangular ponds.
Number of references:15
Main heading:Fisheries
Controlled terms:Experiments - Harvesting - Hydraulic machinery - Lakes - Wire
Uncontrolled terms:Freshwater fishing - Hydraulic winch - Mechanized harvest - Steel wire rope
Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 471.5 Sea as Source of Minerals and Food - 535.2 Metal Forming - 632.2 Hydraulic Equipment and Machinery - 821.3 Agricultural Methods - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2011.10.012
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514865
Title:Planning for cultivated land leveling project in Tibet
Authors:Zou, Lilin (1); Wang, Zhanqi (1); Wang, Jianying (2)
Author affiliation:(1) Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China; (2) School of Economics and Management, China University of Geosciences, Wuhan 430074, China
Corresponding author:Zou, L.(cug_zll0303@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:27
Issue:10
Issue date:October 2011
Publication year:2011
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:In order to offer guidance for cultivated land leveling project construction in Tibet, related problems were studied in this paper. According to the topography and physiognomy, climate and hydrology, soil types, farming system, and constrains of land use, using typical-case-analysis and on-the-spot investigation methods, the planned and implemented land development and consolidation projects in Tibet were analyzed and summarized. Based on the related literature reviews, the suitable cultivated field construction criterion, the soil improvement measures and the earthwork calculation methods were put forward. This research has significant practical meaning for the cost control and regulated development of land development and consolidation in Tibet.
Number of references:24
Main heading:Land use
Controlled terms:Excavation - Foundations - Soils
Uncontrolled terms:Calculation methods - Consolidation projects - Cost controls - Cultivated lands - Earthwork calculation - Farming system - Fields building - Land development - Land leveling - Literature reviews - Project construction - Soil improvement - Soil types - Tibet
Classification code:403 Urban and Regional Planning and Development - 405 Construction Equipment and Methods; Surveying - 405.2 Construction Methods - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2011.10.051
Database:Compendex
Compilation and indexing terms, Copyright 2011 Elsevier Inc.

期刊信息

下载专区

微信公众号

二维码

期刊信息

下载专区

微信公众号

二维码

友情链接