<RECORD 1>
Accession number:20120914812811
Title:Effect of water and salt regulations under drip irrigation on soil hydraulic properties in local coastal saline soil
Authors:Sun, Jiaxia (1); Kang, Yuehu (1); Hu, Wei (1); Wan, Shuqin (1)
Author affiliation:(1) Key Laboratory of Water Cycle and Related Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Corresponding author:Sun, J.(sunjiaxia@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:107-112
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the impact of filter and soil matric potential (-5, -10, -15, -20, -25 kPa) treatments on soil hydraulic conductivity K, Gardner α, and the contribution of pore size classes to flow in coastal saline soil, disc infiltration experiments at pressure heads of -15, -6, -3, and 0 cm were implemented. The results showed that, after local soil salt-water regulation, the hydraulic conductivity Ks and Gardner α were higher than that of the control (CK), and the K6, K15 were smaller than that of the CK, and K3 had no obviously changes. Through the tests of between-subjects effects with two factors of filter and soil matric potential treatments, filter treatment was the main factor to the hydraulic conductivity K, Gardner α, the Ksand K6, Gardner α of filter treatment was significantly larger than non-filter treatment. Contribution of macropores (>0.5 mm) to flow of filter and soil matric potential treatments was higher than CK, and the contribution of mesopores2 (0.25-0.1 mm) and micropores (<0.1 mm) to flow was less than CK, respectively. After the tests of between-subjects effects with two factors of filter and soil matric potential treatments, filter treatment was the main factor to the contribution of pore fraction to water flow. The contribution of macropores (>0.5 mm) and mesopores1 (0.5-0.25 mm) to flow under filter treatment had a significantly difference to the non-filter treatment (sig: 0.038, 0.014, respectively). The soil hydraulic conductivity Ks, K6 and Gardener α had a significantly increase, the contribution of large pore classes to flow increased too. The contributions of small pore classes to flow decreased after local soil salt-water regulation, so it was concluded that the soil structure was getting better after salt-water regulation.
Number of references:20
Main heading:Soil testing
Controlled terms:Durability - Hydraulic conductivity - Irrigation - Moisture - Soils
Uncontrolled terms:Disc infiltrometer - Filter layer treatment - Local soil salt-water regulation - Soil hydraulic properties - Soil matric potential
Classification code:421 Strength of Building Materials; Mechanical Properties - 483.1 Soils and Soil Mechanics - 632.1 Hydraulics - 801.4 Physical Chemistry - 821.3 Agricultural Methods
DOI:10.3969/j.issn.1002-6819.2012.03.019
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 2>
Accession number:20120914812830
Title:Stable carbon and nitrogen isotope characters in rice paddy ditch and wetland system
Authors:Liu, Hui (1); Wang, An (3); Chen, Jing (1); Yin, Kun (4)
Author affiliation:(1) Key Lab. of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Educ., Hohai University, Nanjing 210098, China; (2) Lab. of High-Effective Irrigation and Drainage and Agric. Water and Soil Environ. in Southern China, Ministry of Education, Hohai University, Nanjing 210098, China; (3) College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China; (4) Test and Application Research Institute of Geology and Mineral Resources in Heilongjiang Province, Harbin 150036, China
Corresponding author:Liu, H.(liuhui@hhu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:220-224
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to the situation of severe non-point source pollution in agriculture, taking Nanjing Gaochun irrigation area as study area, the contributions of endogenesis and exogenous inputs to the system were invetigated using stable carbon and nitrogen isotope characteristics analysis. The results showed that the stable carbon and nitrogen characters of the particulate organic matter (POM) varied greatly, the average value was -27.82‰, closed to the aquatic plants and phytoplankton, which may be the main sources of POM. The main factor of phytoplankton was δ<sup>13</sup>C of DIC (dissolved inorganic carbon) in the water, the linear correlation between δ<sup>13</sup>C of DIC and δ<sup>13</sup>C of phytoplankton proved DIC concentration of the δ<sup>13</sup>C of phytoplankton. In this experiment, each sampling point between phytoplankton and POM was no significant difference, meanwhile the δ<sup>13</sup>C of zooplankton and phytoplankton were correlated, indicated that zooplankton concentrated organic carbon from phytoplankton as food. The δ<sup>13</sup>C value changed in sediment range between -27.2‰ to -21.8‰, more carbon than POM, which indicated that sediment composition accumulated more organic carbon than the water particles. The average of δ<sup>15</sup>N in this experiment was -0.6‰, closed to N<inf>2</inf> in atmosphere.
Number of references:22
Main heading:Algae control
Controlled terms:Anoxic sediments - Carbon - Experiments - Isotopes - Nitrogen - Phytoplankton - Wetlands
Uncontrolled terms:Aquatic plants - Average values - Characteristics analysis - Dissolved inorganic carbon - Ditch - Exogenous input - Irrigation area - Linear correlation - Nanjing - Non-point source pollution - Particulate organic matters - Rice paddy - Sampling points - Sediment composition - Stable carbon - Stable carbon and nitrogen isotopes - Study areas - Water particles - Wetland systems
Classification code:453.2 Water Pollution Control - 471 Marine Science and Oceanography - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.03.038
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 3>
Accession number:20120914812801
Title:Numerical simulation of mineral microelement licking block press forming
Authors:Han, Xiaoling (1); Zhai, Zhiping (1); He, Xiangxin (1); Yang, Zhongyi (2)
Author affiliation:(1) Mechanical Engineering of Inner Mongolia University of Technology College, Huhhot 010051, China; (2) Teaching Affairs Office of Inner Mongolia University of Technology College, Huhhot 010051, China
Corresponding author:Zhai, Z.(ngdhxl@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:50-54
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 improving the quality of mineral microelement licking brick, the press forming process of mineral microelement licking brick was simulated with finite element analysis software MSC.Marc2007. The flow behavior of granular materials and dense laws in the process of pressing was analyzed. Based on the simulation result, the reasons for quality defects were found and the size of the green body was forecasted. Distribution of compacted density of mineral microelement licking block was non-uniform in the process of pressing forming and the maximum density was in the outer edge of the top of the green body. As the compressive pressure increases, the compacted density gradually rises and turns even gradually, the optimum compressive pressure was 100 MPa. The simulation results consistent with experimental results well, so it can provide theory reference for practical production.
Number of references:21
Main heading:Pressing (forming)
Controlled terms:Brick - Compression testing - Computer simulation - Finite element method - Minerals - Presses (machine tools) - Trace elements
Uncontrolled terms:Compressive pressure - Finite Element - Finite element analysis software - Flow behaviors - Granule - Green body - Maximum density - Microelements - Practical production - Press forming - Quality defects
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 921.6 Numerical Methods - 804 Chemical Products Generally - 801 Chemistry - 723.5 Computer Applications - 603.1 Machine Tools, General - 535.2.2 Metal Forming Practice - 482.2 Minerals - 414.2 Brick Materials
DOI:10.3969/j.issn.1002-6819.2012.03.009
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 4>
Accession number:20120914812820
Title:Remote monitoring and forecasting system of soil moisture based on ARM and GPRS
Authors:Chen, Tianhua (1); Tang, Haitao (1)
Author affiliation:(1) College of Information Engineering, Beijing Technology and Business University, Beijing 100048, China
Corresponding author:Chen, T.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:162-166
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 GPRS wireless soil moisture monitoring and forecasting system was designed to improve the utilization rate of farm irrigation water and achieve water-saving irrigation. a mathematical model of soil moisture monitoring and forecasting was presented, and a data acquisition system composed of the S3C2410 processor, GPRS module and CS8900a card was developed. The system had the functions of automatic collection, storage, and wireless transmission of soil moisture data, and performed irrigation tasks according to soil moisture data at a specified time and a given amount of water. The system was used for 15 months in the agricultural demonstration base station in Beijing. Experiments show that the error of the forecast value and actual test data is 3.39%, and therefore the system has achieved effective soil moisture monitoring and accurate forecasting of soil moisture.
Number of references:18
Main heading:Soil moisture
Controlled terms:Forecasting - Irrigation - Mathematical models - Microwave measurement - Moisture - Signal processing - Soils - Water supply
Uncontrolled terms:8900A - ARM systems - Data acquisition system - Forecasting system - GPRS - GPRS module - Irrigation waters - Remote monitoring - S3C2410 - Soil moisture monitoring - Test data - Utilization rates - Water-saving irrigation - Wireless transmissions
Classification code:942.2 Electric Variables Measurements - 921 Mathematics - 821.3 Agricultural Methods - 801.4 Physical Chemistry - 716.1 Information Theory and Signal Processing - 483.1 Soils and Soil Mechanics - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2012.03.028
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 5>
Accession number:20120914812821
Title:Soil line automatic identification algorithm based on two-dimensional feature space
Authors:Qin, Qiming (1); You, Lin (1); Zhao, Yue (1); Zhao, Shaohua (1); Yao, Yunjun (1)
Author affiliation:(1) Institute of Remote Sensing and GIS, Peking University, Beijing 100871, China; (2) Ningbo Planning and Geography Information Center, Ningbo 315042, China; (3) Satellite Environment Center, Ministry of Environmental Protection, Beijing 100094, China; (4) College of Globe Change and Earth System Science, Beijing Normal University, Beijing 100875, China
Corresponding author:You, L.(tiancai76@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:167-171
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Soil line is a straight line in two-dimensional spectral space, which is generated from a series of pure soil pixels ranged by reflectance. It is a comprehensive reflection of the soil's characteristic in different water conditions, and helps to understand the physical, chemical and ecological properties of soil and vegetation. For a long time, the soil line has been manually identified with low efficiency and large variability, which limits the further application and promotion of soil line based models. Aimed to solve these problems, the paper proposed an soil line automatic identification algorithm and stated the details of its procedure. With this algorithm, the soil line and its fitting parameters can be automatically identified in the two-dimensional spectral space and calculated based on the reflectance of pixels in the remote sensing image. Through the validation of field experiments and time series data, the algorithm was proved to be a stable and accurate way to identify soil line. The algorithm was applied in drought monitoring model, such as PDI, MPDI and SPSI. The results show that the automatic algorithm can greatly raise the efficiency, improve the accuracy of soil line identification, and contribute to the widespread application of the drought models.
Number of references:15
Main heading:Geologic models
Controlled terms:Algorithms - Automation - Drought - Image reconstruction - Pixels - Reflection - Remote sensing - Soils - Two dimensional
Uncontrolled terms:Automated identification - Automatic algorithms - Automatic identification - Drought monitoring - Ecological property - Field experiment - Fitting parameters - Remote sensing images - Soil line - Spectral spaces - Time-series data - Two-dimensional features - Water conditions
Classification code:921 Mathematics - 741 Light, Optics and Optical Devices - 732 Control Devices - 731.1 Control Systems - 731 Automatic Control Principles and Applications - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 711 Electromagnetic Waves - 483.1 Soils and Soil Mechanics - 481.1 Geology - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.03.029
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 6>
Accession number:20120914812819
Title:Study on land degradation monitoring in Naiman county using remote sensing
Authors:Du, Zitao (1); Yang, Xiaoming (1); Yan, Shuqiang (1); Wang, Dejun (1); Ren, Haifeng (1)
Author affiliation:(1) College of Civil Engineering, Hebei University of Technology, Tianjin 300401, China; (2) Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China
Corresponding author:Du, Z.(dzt@irsa.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:154-161
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Naiman county is one of the counties with serious land degradation. In order to figure out its degradation type, distribution and degree and monitor its degradation process and trend, the land use/coverage change, sandy area ratio in a pixel, composite vegetation index, and soil moisture were selected as four indexes of land degradation evaluation system. All the four indexes were retrieved from TM images. Then the judge matrix of four indexes were constructed using analytical hierarchy process, the eigenvector of judge matrix was calculated to obtain the weight of four indicators. Finally the model of land degradation estimation system was built with four weights. According to the model, the land degradation of Naiman county was classified into 5 levels, no degradation, slight degradation, medium degradation, bad degradation and serious degradation. The degradation evaluation results demonstrated that land degradation of Naiman county had a improvement in some local area, but overall worsening during 1987-1999, while the land degradation has been constrained and degradation treatment has gained some effect since 2000. The research is of some importance and guidance to the degradation treatment and ecological construction in Naiman county.
Number of references:25
Main heading:Weathering
Controlled terms:Degradation - Land use - Remote sensing - Soil moisture
Uncontrolled terms:5-level - Analytical Hierarchy Process - Area ratios - Degradation process - Ecological construction - Estimation systems - Evaluation results - Evaluation system - Land degradation - Land degradation monitoring - matrix - Support vector - TM image - Vegetation index
Classification code:403 Urban and Regional Planning and Development - 483.1 Soils and Soil Mechanics - 731.1 Control Systems - 802.2 Chemical Reactions
DOI:10.3969/j.issn.1002-6819.2012.03.027
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 7>
Accession number:20120914812816
Title:Design of ReGA gateway for general agricultural environment information monitoring system
Authors:Zhang, Haihui (1); Zhu, Jiangtao (2); Wu, Huarui (3); Deng, Qinghai (2); Ma, Jinhui (2); Ji, Daxiang (2)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, 712100, China; (2) College of Information Engineering, Northwest A and F University, Yangling, 712100, China; (3) National Engineering Research Center for Information Technology in Agriculture, Key Laboratory for Information Technologies in Agriculture, Ministry of Agriculture, Beijing, 100097, China
Corresponding author:Wu, H.(wuhr@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:135-141
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:Wireless sensor network (WSN) has unparalleled advantages and broad prospects in development of intelligent agriculture. The Gateway plays a important role as the bridge for linking WSN to external application system. Most of the researches currently are specialized in specific data logging and transmission; few of them have the capacity to manage the information of monitoring area. Taking general agricultural environment information monitoring system unrelated to application fields as the background, the paper proposed a Re-configurable Gateway Architecture (ReGA) based on Wince OS, that not only can transmit monitoring data and controlling instructions, but also serves as an integrated management platform for the property of network and environment factors through a visual interface, and provides a SMS warning for exceptional data. The flexibility of ReGA is embodied in supporting of dynamic configuration of environmental monitoring type, monitoring nodes' properties, monitoring areas' attributes. By defining interactive protocols with nodes and server, the interactive instructions and package parameters can be configured. Experiments prove that ReGA is highly reliable, and can be applied to various fields like farm, fishery, forestry and greenhouse flexibly.
Number of references:19
Main heading:Information management
Controlled terms:Agriculture - Computer systems - Gateways (computer networks) - Monitoring - Wireless sensor networks
Uncontrolled terms:Agricultural environments - Application fields - Application systems - Configurable - Data logging - Dynamic configuration - Environment factors - Environmental Monitoring - Gateway architecture - Integrated management - Interactive protocols - Moni-toring nodes - Re-configurable - Visual Interface - Wireless sensor
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 903.2 Information Dissemination - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 732 Control Devices - 722 Computer Systems and Equipment - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2012.03.024
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 8>
Accession number:20120914812804
Title:Contact point trajectory equations of spherical arc bevel gears
Authors:Wang, Yutan (1); Li, Wenbin (1); Liu, Qian (1)
Author affiliation:(1) School of Technology, Beijing Forestry University, Beijing 100083, China; (2) School of Mechanical Engineering, Ningxia University, Yinchuan 750021, China; (3) College of Information and Management Science, Henan Agricultural University, Zhengzhou 450002, China
Corresponding author:Li, W.(leewb@bjfu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:65-69
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 increase the capacity of the gears in a central transmission system in agricultural machinery and other mechanical systems, to decrease the overall size and the body ground clearance, a possibly ideal spherical arc bevel gear was studied. Based on arc bevel gear meshing theory and the geometric coordinate transformation, the method of spherical trigonometry was applied. The contact point arc trajectory equations of spherical arc bevel gears and the profile of gears tooth surface equations were determined. Therefore the spherical arc bevel gear design theory was further improved and the three dimensional shape of the gears was generated. The results provide a theory basis for correct designing and processing spherical arc of spiral bevel gear with an ideal spherical surface on the main transverse plane and with an arc spiral tooth profile of the end face. They also provide a theoretical foundation for the followed up parameterized designing and digitalized processing for spherical arc bevel gears.
Number of references:20
Main heading:Bevel gears
Controlled terms:Agricultural machinery - End effectors - Fabrication - Functions - Gears - Mathematical transformations - Models - Spheres - Three dimensional
Uncontrolled terms:Arc trajectory - Co-ordinate transformation - Contact point - Contact point trajectory - Contact points - Gear design - Gear meshing - Ground clearance - Mechanical systems - Parameterized designing - Spherical cap - Spherical surface - Spiral bevel gears - Theoretical foundations - Three-dimensional shape - Tooth profile - Tooth surface - Transmission systems - Transverse planes
Classification code:921 Mathematics - 913.4 Manufacturing - 902.1 Engineering Graphics - 921.3 Mathematical Transformations - 821.1 Agricultural Machinery and Equipment - 631 Fluid Flow - 601.2 Machine Components - 731.5 Robotics
DOI:10.3969/j.issn.1002-6819.2012.03.012
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 9>
Accession number:20120914812829
Title:Synchronous removal of nitrogen and copper from biogas slurry by electrode-SBBR
Authors:Chen, Yucheng (1); Yang, Zhimin (1); Guo, Ling (2); Liu, Jing (3); Ma, Huanchun (1)
Author affiliation:(1) Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Resources and Environment, Southwest University, Chongqing 400716, China; (2) College of Information, Shanxi Agricultural University, Shanxi 030800, China; (3) Sichuan Chentai Project Management Consulting Co. Ltd., Sichuan 610041, China
Corresponding author:Chen, Y.(chenyucheng@swu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:215-219
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For consideration of excessive ammonia nitrogen (NH<inf>4</inf><sup> </sup>-N) in concentrated biogas slurry, and copper (Cu<sup>2 </sup>) caused by additions of feed additives, a new system of electrode-sequencing batch biofilm reactor (SBBR) technique was constructed for simultaneously removing the NH<inf>4</inf><sup> </sup>-N and copper in concentrated biogas slurry, through integrating the advantages of two methods including electrode-biofilm and SBBR. Meanwhile, through simulated wastewater and biogas slurry, the both of pertinent parameters and effects of electrode-SBBR were also investigated. The results showed that the operating process of this technique was: adding water &rarr anaerobic processing &rarr aeration &rarr anoxic or anaerobic processing &rarr effluent dewatering &rarr idle. The optimal conditions were suggested as follows: hydraulic retention time (HRT) was 7.0 h, anaerobic and aeration time was 0.5 h and 4.0 h respectively, and anoxia/anaerobic time was 2.5 h, furthermore, electric current ranged 30-60 mA, DO was 4.0-5.0 mg/L and C/N ratio was greater than 10.0. In summary, the removing efficiencies of total nitrogen, Cu<sup>2 </sup> and COD from the biogas slurry could reach to 45.79%, 86.53% and 84.86% respectively by the electrode-SBBR system. The results indicate that the electrode-SBBR system can be considered as a new technique for removal of nitrogen and copper from the biogas slurry simultaneously.
Number of references:19
Main heading:Biogas
Controlled terms:Anoxic sediments - Copper - Denitrification - Effluents - Electrodes - Nitrogen - Nitrogen removal
Uncontrolled terms:Ammonia nitrogen - BIofilm reactors - Biogas slurry - C/N ratio - Feed additives - Hydraulic retention time - Operating process - Optimal conditions - SBBR - Simulated wastewater - Total nitrogen
Classification code:804 Chemical Products Generally - 802.2 Chemical Reactions - 704.1 Electric Components - 544.1 Copper - 522 Gas Fuels - 483 Soil Mechanics and Foundations - 452.3 Industrial Wastes
DOI:10.3969/j.issn.1002-6819.2012.03.037
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 10>
Accession number:20120914812793
Title:Effect of irrigated agriculture development on evolution of shallow groundwater system in Delingshan area, Inner Mongolia
Authors:Chen, Sheming (1); Lu, Wenxi (1); Luo, Jiannan (1); Xin, Xin (1)
Author affiliation:(1) Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Changchun 130021, China
Corresponding author:Lu, W.(luwenxi@jlu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:1-7
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to understand the effect of irrigated agriculture development on evolution of shallow groundwater system, shallow groundwater system condition of Delingshan area of Inner Mongolia in 1979 was taken as nature condition which was not strongly disturbanced by human activity. The variations of groundwater recharged and discharged in 2008 were calculated using water balance principle, and the groundwater quality was evaluated. The evolution direction and extent were analyzed by comparison of variation of shallow groundwater system input (supply item) and output (discharge item), as well as hydraulic field and chemical field under natural condition and current condition. The results show that irrigated agriculture has become the main factor of shallow groundwater evolution. The effect of irrigated agriculture on evolution hydraulic field of study area expressed in continued reduction of groundwater level and severe change of the groundwater flow field. The effect on evolution of groundwater system chemical field expressed in the change of groundwater chemical types and increase of groundwater pollution.
Number of references:20
Main heading:Agriculture
Controlled terms:Drainage - Groundwater - Groundwater flow - Irrigation - Slope stability - Water quality
Uncontrolled terms:Evolution - Evolution direction - Groundwater quality - Groundwater system - Human activities - Inner Mongolia - Irrigated agriculture - Natural conditions - Shallow groundwater - Study areas - Water balance
Classification code:821.3 Agricultural Methods - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 502 Mines and Quarry Equipment and Operations - 453.2 Water Pollution Control - 444.2 Groundwater - 442 Flood Control; Land Reclamation - 406.2 Roads and Streets - 406 Highway Engineering - 401 Bridges and Tunnels
DOI:10.3969/j.issn.1002-6819.2012.03.001
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 11>
Accession number:20120914812828
Title:Properties of digestive solution during anaerobic degrading rape straw by three different microbial communities
Authors:Lü, Yucai (1); Cui, Zongjun (2); Wang, Xiaofen (2); Li, Ning (3); Gong, Dachun (1)
Author affiliation:(1) Alan G. Macdiarmid Research Institute of Renewable Energy, China Three Gorges University, Yichang 443002, China; (2) College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; (3) College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, China
Corresponding author:Cui, Z.(acuizj@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:210-214
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Straw acidification pre-treatment by microorganisms can improve efficiency of methane fermentation. In order to explore the effect of different microbial communities on digestion of straw, three different microbial communities (cellulose-degrading community MC1, cellulose-degrading community WDC2 and cattle dung microbial community (CD)) were used to acidify rape straw. Effect of acidification pre-treatment on rape straw was evaluated by detecting properties changing of digestive solution during digestion process of rape straw. The results indicated that community MC1, WDC2 and CD could improve the efficiency of rape straw digestion effectively (degradation rates of rape straw were 46.77%, 44.28% and 43.40% respectively), and degradation rate increased by 12.21%-15.58% comparing with control treatments of no adding exogenous bacteria. Community MC1 and WDC2 could effectively improve COD content in the digestive solution. In 48h of digestion, COD content in solution digested by the two communities increased by 9.13% and 7.83%, respectively compared with treatments without adding exogenous bacteria. Cow manure microbial community had no capability of improving COD content in the digestive solution. In addition, compared with community MC1 and cow manure, community WDC2 could better maintain soluble sugar content in the digestive solution. Therefore, three microbial communities are cable to digest rape straw, cellulose-degrading community WDC2 has better digestion activity of rape straw and COD-producing capability comparing with community MC1 and CD.
Number of references:15
Main heading:Straw
Controlled terms:Acidification - Agricultural wastes - Anaerobic digestion - Bacteria - Biogas - Cellulose - Degradation - Fermentation - Manures - Methane - Sludge digestion - Sugars
Uncontrolled terms:Cattle dung - Cow manure - Degradation rate - Digestion process - Methane fermentation - Microbial communities - Pre-Treatment - Soluble sugars
Classification code:822.2 Food Processing Operations - 821.5 Agricultural Wastes - 815.1.1 Organic Polymers - 804.1 Organic Compounds - 802.2 Chemical Reactions - 461.9 Biology - 452.2 Sewage Treatment
DOI:10.3969/j.issn.1002-6819.2012.03.036
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 12>
Accession number:20120914812800
Title:Discrete element method analysis of impact action between rice particles and impact-board
Authors:Qiu, Baijing (1); Jiang, Guowei (1); Yang, Ning (1); Guan, Xianping (1); Xie, Jinjian (1); Li, Yaoming (1)
Author affiliation:(1) Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Jiang, G.(jguowei@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:44-49
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Contacts model of Hertz-Mindlin (no slip) based on discrete element method of soft-sphere was used to simulate the impact action between the rice particles flow and the impact-board in order to improve the measurement accuracy of grain flow. The relationship of rice mass and mean normal impact force was analyzed when the line velocity of elevator was 0.5, 1.0 and 1.5 m/s. The results showed that simulation parameters of discrete element method which used between rice particles and impact-board were reasonable, and it had great practical value; The Linear correlation increased from 0.8062, 0.9082, 0.9891 to 0.9144, 0.9630, 0.9944 at three velocities respectively when the sliding stages removed. Therefore, we should consider how to reduce the sliding stages to improve the measurement accuracy when designed the measurement device of grain flow. This article can provide technical support for the research and development of grain mass flow device.
Number of references:24
Main heading:Grain (agricultural product)
Controlled terms:Computer simulation - Finite difference method - Impact strength - Models - Spheres
Uncontrolled terms:Contact mechanics - Grain flow - Grain mass - Impact action - Linear correlation - Measurement accuracy - Measurement device - Normal impact - Research and development - Simulation parameters - Technical support
Classification code:421 Strength of Building Materials; Mechanical Properties - 631 Fluid Flow - 723.5 Computer Applications - 821.4 Agricultural Products - 902.1 Engineering Graphics - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2012.03.008
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 13>
Accession number:20120914812825
Title:Simulation model for predicting the effects of substrate water potential on leaf area of cut lily
Authors:Dong, Yongyi (1); Li, Gang (1); An, Dongsheng (1); Luo, Weihong (1)
Author affiliation:(1) College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China; (2) College of Agriculture, Inner Mongolia University for Nationalities, Tongliao Inner Mongolia 028042, China
Corresponding author:Luo, W.(lwh@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:191-197
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 is not only an important external quality trait of flower plants, but also a parameter used in the photosynthesis-driven crop growth model. The aim of this study was to develop a model for predicting the effects of water supply on plant leaf area. For this purpose, experiments of cut lily (Lilium cv 'Sorbonne') with different planting dates and different levels of water treatment were conducted in a multi-span greenhouse located at Nanjing from March 2009 to January 2010. Based on the experimental data, the critical water potential for cut lily growth was then determined. The seasonal changes of leaf area of the cut lily plants, and the impacts of substrate water potential on the maximum leaf length (L<inf>max</inf>), the increasing rate of L<inf>max</inf> with leaf rank before the maximum length of matured leaf appeared, the photo-thermal index accumulated from the date when the leaf appears to the date when the leaf reaches its maximal length were quantitatively investigated. Based on these quantitative analyses, a dynamic model was developed for predicting the effects of substrate water potential on leaf area index of cut lily plants. Independent experimental data were used to validate the model. The results showed that the model gave good predictions of leaf area index. The coefficient of determination (r<sup>2</sup>) between the simulated and the measured values of number of leaf unfolding, individual leaf length and leaf area index were 0.96, 0.82, 0.97, respectively. The relative root mean square error (rRMSE) between the simulated and the measured values were 6.32%, 8.78%, 7.12% respectively, for number of leaf unfolding, individual leaf length and leaf area index. The model developed in this study can satisfactorily predict the dynamics of the leaf area of cut lily organs, hence, can be used for optimizing water management for cut lily production.
Number of references:16
Main heading:Plants (botany)
Controlled terms:Computer simulation - Forecasting - Mean square error - Models - Substrates - Water management - Water supply
Uncontrolled terms:Coefficient of determination - Crop growth model - Cut lily - Experimental data - External quality - Leaf area - Leaf Area Index - Leaf length - Multi-spans - Nanjing - Photo-thermal - Plant leaf - Planting date - Root mean square errors - Seasonal changes - Simulation model - Water potential
Classification code:902.1 Engineering Graphics - 801 Chemistry - 731.1 Control Systems - 723.5 Computer Applications - 921 Mathematics - 461.9 Biology - 446.1 Water Supply Systems - 446 Waterworks - 444 Water Resources - 461 Bioengineering and Biology
DOI:10.3969/j.issn.1002-6819.2012.03.033
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 14>
Accession number:20120914812840
Title:Purification of water soluble dietary fiber (SDF) from peanut hull using ultrafiltration
Authors:Wang, Shiqing (1); Yu, Lina (2); Yang, Qingli (2); Li, Hongxia (1)
Author affiliation:(1) College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; (2) Shandong Peanut Research Institute, Qingdao 266100, China
Corresponding author:Yang, Q.(rice407@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:278-282
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the effective purification technology for water soluble dietary fiber (SDF) from peanut hull, the suitable membrane module was determined. The separation of SDF extracting solution with ultrafiltration was conducted using membrane with different molecular weight cut-off and optimizing membrane separation process conditions. The results showed that PS-30 polysulfone membrane had the best separation effect under the operating conditions of pressure 0.08 MPa, ratio of material to liquid 1:75 g/mL, temperature 30°C. Under these conditions, the membrane flux reached 127.2 L/(m<sup>2</sup>·h), the yield of SDF was 67.56%, non-starch polysaccharides (NSP) quality fraction increased from 49.85% to 92.36%, and the protein quality fraction decreased from 5.53% to 0.92%. Compared with the conventional extraction method, ultrafiltration membrane separation technology has the advantages of short producing cycle, low manufacturing cost and high purity and quality.
Number of references:19
Main heading:Microfiltration
Controlled terms:Filtration - Membranes - Optimization - Purification - Separation - Ultrafiltration - Water filtration
Uncontrolled terms:Conventional extraction - Dietary fibers - High purity - Manufacturing cost - Membrane fluxes - Membrane module - Membrane separation process - Molecular weight cutoff - Non-starch polysaccharides - Operating condition - Peanut hull - Polysulfone membranes - Protein quality - Purification of water - Ultra-filtration membranes - Watersoluble
Classification code:802.3 Chemical Operations - 921.5 Optimization Techniques - 951 Materials Science
DOI:10.3969/j.issn.1002-6819.2012.03.048
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 15>
Accession number:20120914812838
Title:Influence of packaging materials on storage property of peanut under normal temperature
Authors:Chen, Hong (1); Xiong, Lirong (1); Wang, Jing (1); Wan, Peng (1); Hu, Xiaobo (2)
Author affiliation:(1) College of Engineering, Huazhong Agricultural University, Wuhan 430070, China; (2) College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Chen, H.(chenhong@mail.hzau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:269-273
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 influence of packaging materials on storaged peanut at normal temperature, the paper investigated the effects of commonly-used 3 types of packaging materials on peanut's color, moisture content, conductivity, germination percentage, Aspergillus flavus infection index and insecticidal effect. The results showed that the packaging materials had notable influences on peanut's storage quality index. The seed coat color change rate of peanut packaged in plastic film bag was slower than that in woven bag and sack. Meanwhile, the strong water-preservation ability of plastic film bag enabled itself to effectively prevent against water evaporation of peanuts. However, at the initial stage of storage, the closed package environment of plastic film bag can cause anaerobic respiration which will damage the cell membrane structures of seed coat and embryo, and leads to sharp increase of conductivity. The seed coat is an important barrier of peanut to prevent itself from being infected by Aspergillus flavus. Therefore, the anti-infection ability of peanut packaged in plastic film bag was worse than that in woven bag and sack. The germination percentage of peanut packaged in woven bag and sack was a bit higher than that in plastic film bag. The 3 types of packagings had significant difference in restraining insect pests. The peanuts packaged in highly-permeable woven bag and sack suffer serious invasion from insect pests, while in plastics film bag it can effectively prevent infection. In a conclusion, the change of peanut quality is a dynamic and complex process, which requires to comprehensively considering the peanut's physiological characteristics and storage environment before choosing a proper packaging material. The research can provide a reference for peanut storaged at normal temperature.
Number of references:23
Main heading:Packaging materials
Controlled terms:Aspergillus - Cell membranes - Cultivation - Cytology - Energy storage - Oilseeds - Plastic films - Quality control - Weaving
Uncontrolled terms:Anaerobic respiration - Anti-infection - Aspergillus flavus - Complex Processes - Initial stages - Insect pest - Peanut - Physiological characteristics - Seed coats - Seed-coat color - Sharp increase - Storage properties - Storage quality - Water evaporation
Classification code:913.3 Quality Assurance and Control - 821.4 Agricultural Products - 821.3 Agricultural Methods - 819.5 Textile Products and Processing - 817.1 Polymer Products - 702 Electric Batteries and Fuel Cells - 694.2 Packaging Materials - 461.9 Biology - 461.2 Biological Materials and Tissue Engineering
DOI:10.3969/j.issn.1002-6819.2012.03.046
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 16>
Accession number:20120914812814
Title:Sensitivity analysis of crop growth models to multi-temporal scale solar radiation
Authors:Wu, Wei (1); Fan, Li (2); Li, Maofen (3); Liu, Hongbin (3); Li, Yaoqin (4)
Author affiliation:(1) College of Computer and Information Science, Southwest University, Chongqing 400716, China; (2) Chongqing Institute of Meteorological Science, Chongqing 401147, China; (3) College of Resources and Environment, Southwest University, Chongqing 400716, China; (4) Agricultural Commission of Wanzhou District, Chongqing 404120, China
Corresponding author:Liu, H.(lhbin@swu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:123-128
Language:English
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The records of daily solar radiation (Rs, MJ·m<sup>-2</sup>·d<sup>-1</sup>) are the important inputs for crop simulation models. However, for some model users, Rs at longer temporal intervals are more available than that at daily scale. The objective of this study was to analyze the sensitivity of simulated crop growth and production using CERES-Maize and GROPGRO-Soybean, two widely used crop growth models, to uncertainty in Rs at different time scales (5-day, 10-day, and monthly). Daily radiation data (1961-1990) from Vegetation/Ecosystem Modeling and Analysis Project (VEMAP) for the state of Georgia, USA were used to create 5-day, 10-day, and monthly mean daily Rs data sets. Datasets related to daily Rs were used as background baselines. The overall performance of the models was not significantly affected by Rs under the studied time scales. Within locations, the simulated days to anthesis and grain yields from 5-day, 10-day, and monthly Rs were close to that from daily Rs for maize and soybean under rainfed and irrigated conditions, respectively. Mean values of relative mean bias error (RMBE), mean bias error (MBE) and root mean square error (RMSE) of the simulated days to anthesis were 0, 0 and 3.5 d for the two crops under the studied scenarios, respectively. The simulated yields were underestimated for maize and overestimated for soybean using 5-day, 10-day, and monthly Rs for both rainfed and irrigated conditions, respectively. Under rainfed and irrigated conditions, the average RMBE and RMSE were -0.59%, 120 kg/hm<sup>2</sup> and -0.52%, 129 kg/hm<sup>2</sup> for maize yield, and 5%, 152 kg/hm<sup>2</sup> and 4.7%, 165 kg/hm<sup>2</sup> for soybean, respectively. Short-term bias in the difference between evaluated time scales and daily scale could affect the outputs of the crop models. Under the scenarios evaluated, CGOPGRO-Soybean model showed higher sensitivity to changes in multi-temporal Rs and water regimes than CERES-Maize model. Based on the results of this study, it can be concluded that 5-day, 10-day, and monthly mean daily Rs could be used as an input for crop growth simulation models when daily Rs are not available.
Number of references:18
Main heading:Computer simulation
Controlled terms:Artificial intelligence - Crops - Decision support systems - Mean square error - Models - Oilseeds - Solar radiation - Sun - Time measurement - Uncertainty analysis
Uncontrolled terms:CERES-Maize - Crop growth - Crop growth model - Crop model - Crop simulation model - CROPGRO-Soybean - Data sets - Decision supports - Different time scale - Georgia - Grain yield - Maize yield - Mean bias errors - Mean values - Modeling and analysis - Multi-temporal - Rainfed - Root mean square errors - Temporal intervals - Time-scales - Water regime
Classification code:922.2 Mathematical Statistics - 922.1 Probability Theory - 902.1 Engineering Graphics - 943.3 Special Purpose Instruments - 821.4 Agricultural Products - 657.2 Extraterrestrial Physics and Stellar Phenomena - 657.1 Solar Energy and Phenomena - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2012.03.022
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 17>
Accession number:20120914812803
Title:Removal effect of biochar powder from biomass pyrolysis by clone dust remover
Authors:Li, Yongjun (1); Yi, Weiming (1); He, Fang (1); Bai, Xueyuan (1); Li, Zhihe (1); Cai, Hongzhen (1)
Author affiliation:(1) Shandong Research Center of Engineering and Technology for Clean Energy, Shandong University of Technology, Zibo 255091, China
Corresponding author:Li, Y.(liyongjun@sdut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:60-64
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Biochar powder is one of the principle byproducts from the biomass pyrolysis process and its removal efficiency from the pyrolysis vapor affects the quality of subsequent oil product significantly. In this study, the dust removal characteristic of a cyclone was investigated experimentally on a drop-tube fast pyrolysis reactor. In this reactor, dust concentration in the pyrolysis vapor before entering the cyclone of was about 35-50 g/m<sup>3</sup> and varied randomly. Results showed that 91% of particles of char dust collected in the cyclone were between 0.39 and 30 μm in size. And amount of particles which were smaller than 0.39 μm or bigger than 40 μm were negligible. The dust removal efficiency of the cyclone was less than 80%. With the increase of the dust concentration in pyrolysis vapor, the dust removal efficiency of the cyclone increases slightly.
Number of references:18
Main heading:Pyrolysis
Controlled terms:Byproducts - Chemical reactors - Dust control - Efficiency - Experiments - Storms - Vapors
Uncontrolled terms:Biochar - Biomass pyrolysis - Cyclone - Dust collected - Dust concentrations - Dust removal - Dust removal efficiency - Fast pyrolysis - Oil product - Removal efficiencies
Classification code:913.1 Production Engineering - 901.3 Engineering Research - 804 Chemical Products Generally - 802.2 Chemical Reactions - 802.1 Chemical Plants and Equipment - 451.2 Air Pollution Control - 443.3 Precipitation
DOI:10.3969/j.issn.1002-6819.2012.03.011
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 18>
Accession number:20120914812807
Title:Improvement effect of subsurface drainage on secondary salinization of greenhouse soil and tomato yield
Authors:Zhang, Jie (1); Chang, Tingting (2); Shao, Xiaohou (1)
Author affiliation:(1) Key Lab. of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Nanjing 210008, China; (2) College of Water Conservancy and Hydropower Engineering, HoHai University, Nanjing 210008, China
Corresponding author:Zhang, J.(zhangjiejxd@hhu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:81-86
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to solve the problem of secondary salinization of greenhouse soil, a subsurface drainage system was set up with plastic bellows buried in the soil of the greenhouse to probe into the measures against secondary salinization of soil, and to study the changes of soil basic physicochemical properties through subsurface drainage. Soil electrical conductivity (EC), soil saturated hydraulic conductivit, bulk density, porosity and yield of tomato were studied. The system was installed with two arrangements, space of 6 m and depth of 40 cm; space of 8 m and depth of 70 cm. Results showed that the subsurface drainage system lowered the EC of different soil layers, especially the EC of soil which above the subsurface drainage. Meanwhile, saturated hydraulic conductivity of soil increased, bulk density decreased, but bulk porosity increased. The tomato yield increased as the average weight of single fruit increased. All these indicators of the system with space 8 m and depth 70 cm were better than those of the system with space 6 m and depth 40 cm. It is concluded that the effect of drainage system with space 8 m and depth 70 cm on improvement of soil secondary salinization was more significant than that of the system with space 6 m and depth 40 cm in greenhouse.
Number of references:20
Main heading:Drainage
Controlled terms:Electric conductivity - Fruits - Greenhouse effect - Greenhouses - Groundwater flow - Irrigation - Natural water geochemistry - Soil moisture
Uncontrolled terms:Bulk density - Drainage systems - Electrical conductivity - Greenhouse soil - Physicochemical property - Saturated hydraulic conductivity - Secondary salinization - Soil electrical conductivity - Soil layer - Subsurface drainage system - Subsurface drainages - Tomato - Tomato yield - Yield
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 502 Mines and Quarry Equipment and Operations - 483.1 Soils and Soil Mechanics - 451 Air Pollution - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 444.2 Groundwater - 442 Flood Control; Land Reclamation - 406 Highway Engineering - 401 Bridges and Tunnels - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.03.015
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 19>
Accession number:20120914812835
Title:Evaluation of landscape pattern changes and ecological effects in land reclamation project of mining area
Authors:Li, Baojie (1); Gu, Hehe (1); Ji, Yazhou (1)
Author affiliation:(1) Jiangsu Key Laboratory of Resources and Environmental Information Engineering, China University of Mining and Technology, Xuzhou 221116, China; (2) College of Urban and Environmental Science, Xuzhou Normal University, Xuzhou 221116, China
Corresponding author:Li, B.(liboje@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:251-256
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 effect of landscape pattern and ecological effects caused by land reclamation project in mining area, taking land reclamation project of Jiuli mining area in Xuzhou, China as an example, the land use structure and landscape pattern changes were analyzed based on GIS and method of landscape ecology. The ecological effects of mining area were evaluated with an indices system which was constructed with optimized landscape pattern and the weight was assigned for each index by AHP method. The results showed that the ecological environment of Jiuli mining area was improved as a result of the land reclamation project, while several indexes had both positive and negative effects on the ecosystem. The positive effects were indicated by the increased average patch area, ecosystem services value, density and area of corridor, biodiversity, etc. The negative effects to ecosystem in coal mining area were indicated by decreased fraction dimension and changes of original landscape. Conclusion demonstrated that ecological compensation should be carried out by measures as biological, engineering, technology during the land reclamation.
Number of references:18
Main heading:Ecosystems
Controlled terms:Biodiversity - Coal mines - Forestry - Geographic information systems - Land reclamation - Land use
Uncontrolled terms:AHP method - Coal mining area - Ecological compensation - Ecological effect - Ecological environments - Ecosystem services value - Fraction dimension - Geographic information - Landscape ecology - Landscape pattern - Landscape pattern changes - Mining areas - Patch area - Positive and negative effect - Positive effects - Reclamation project
Classification code:821.0 Woodlands and Forestry - 723.3 Database Systems - 503.1 Coal Mines - 461 Bioengineering and Biology - 454.3 Ecology and Ecosystems - 454 Environmental Engineering - 442.2 Land Reclamation
DOI:10.3969/j.issn.1002-6819.2012.03.043
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 20>
Accession number:20120914812808
Title:Effects of tillage patterns on crop yields and soil physicochemical properties in wheat-rice rotation system
Authors:Wu, Ji (1); Guo, Xisheng (1); Zhang, Xiangming (1); Wang, Yunqing (1); Xu, Zhengyu (1); Lu, Jianwei (3)
Author affiliation:(1) Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230031, China; (2) Anhui Provincial Key Laboratory of Nutrient Recycling, Resources and Environment, Hefei 230031, China; (3) College of Resources and Environmental Sciences, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Lu, J.(lujianwei@mail.hzau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:87-93
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 effects of tillage systems on crop yields and soil physical and chemical properties in wheat-rice rotation system, a long term (2007-2010) experiment was conducted. The results showed that compared with conventional tillage, the soil bulk density increased and soil water content decreased with no-tillage. But even without tillage, bulk density of the 0-10 cm soil layer was still suitable for the growth of crops. No-tillage enriched soil organic matter and total nitrogen in the surface soil layer. Both the soil organic matter and total N content of no-tillage were significantly higher in 0-10 cm layer and lower in 10-20 cm layer than that of conventional tillage. During the wheat season, the soil alkali N, available P and available K contents had the same trends with those of organic matter and total N. Whereas during the rice season, with no-tillage, the soil alkali N, available P and available K contents in 0-20 cm layer were lower than those of conventional tillage. The results also indicated that the treatment of no-tillage increased wheat yield, but significantly reduced rice production, and the key component of the yield was the effective panicle amount of wheat or rice. During the whole wheat-rice rotation system, the yields of wheat treated with no-tillage and the yield of rice treated with conventional tillage were 5.7% higher than wheat with conventional tillage and rice with no-tillage.
Number of references:26
Main heading:Agriculture
Controlled terms:Agricultural machinery - Biogeochemistry - Biological materials - Chemical properties - Land use - Moisture - Organic compounds - Rotation - Soil moisture - Soils
Uncontrolled terms:Conventional tillage - No tillage - Soil physical and chemical properties - Wheat-rice rotation system - Yield
Classification code:821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 801 Chemistry - 601.1 Mechanical Devices - 483.1 Soils and Soil Mechanics - 461.2 Biological Materials and Tissue Engineering - 423 Non Mechanical Properties and Tests of Building Materials - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2012.03.016
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 21>
Accession number:20120914812824
Title:Surfaces reconstruction of plant leaves based on point cloud data
Authors:Sun, Zhihui (1); Lu, Shenglian (1); Guo, Xinyu (1); Wen, Weiliang (1)
Author affiliation:(1) Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) Information Engineering Institute, Capital Normal University, Beijing 100048, China
Corresponding author:Guo, X.(guoxy@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:184-190
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 one of the most important organs, the high-accuracy plant leaf geometric model contributes to agronomic research such as shape feature exaction and canopy light distribution calculation. This paper proposed a method of surface reconstruction based on 3D scanned point cloud for plant leaves. This method generated the initial surface mesh from the point cloud through Delaunay triangulation after removing the noise points, and an optimization algorithm was applied to eliminate wrong edges. The results show that the proposed method can reconstruct high-quality 3D surface of plant leaf from point cloud data, which is also applicable to complex shapes like wilting and withered leaves.
Number of references:17
Main heading:Three dimensional
Controlled terms:Agronomy - Algorithms - Image reconstruction - Least squares approximations - Mesh generation - Models
Uncontrolled terms:3D surface - Complex shapes - Delaunay triangulation - Geometric models - High quality - High-accuracy - Light distribution - Optimization algorithms - Plant leaf - Plant leaves - Plants - Point cloud - Point cloud data - Shape features - Surface mesh - Surfaces reconstruction
Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 741 Light, Optics and Optical Devices - 821.3 Agricultural Methods - 902.1 Engineering Graphics - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.03.032
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 22>
Accession number:20120914812831
Title:Distribution and risk assessment of organochlorine pesticides (OCPs) in soils of typical agricultural regions in Xinjiang
Authors:Ran, Dan (1); Lu, Jianjiang (1); Yao, Xiaorui (1); Liu, Zilong (1); Du, Zhijian (1); Zhang, Shuo (1)
Author affiliation:(1) Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China
Corresponding author:Lu, J.(ljj_tea@shzu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:225-229
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To enhance pollution prevention and control of organochlorine pesticides (OCPs), the extent of organochlorine pesticides contamination in typical agricultural regions in Xinjiang was investigated in the paper. Surface soil samples from Xinjiang were collected and analyzed for obtaining the residual levels of 15 OCPs. The concentrations were in the ranges of 0.37-22.82 ng/g for HCHs, 0.91-858.47 ng/g for DDTs, 0.15-47.08 ng/g for chlordane-associated compounds, N.D (not detected)-16.27 ng/g for endosulfan and N.D-73.83 ng/g for endosulfan sulfate. Analysis of the sources of contamination showed that HCHs in the area were derived from an old mixed source of technical HCHs and lindane. DDTs, which were suspected to have recent application to the soil in most sites, were derived mainly form a mixture of technical DDTs and dicofol containing DDT impurites, and that chlordanes have new input while endosulfan have few new resources. Five principal components were extracted from 15 components by principal component analysis, accounting for 79.93% of the 15 OCPs tested suggesting that the occurrence of pests and diseases, the application of different OCPs and the components of the pesticides, were all reflected by the messages contained in the principal components. The gray correlative analysis assessment was used to evaluate pollution level of OCPs, the results showed that the pollution level of Shihezi was the highest, and that further measures of pollution control should be taken in all regions.
Number of references:22
Main heading:Risk assessment
Controlled terms:Agricultural chemicals - Distribution functions - Insecticides - Pesticides - Pollution control - Soils
Uncontrolled terms:Correlative analysis - Dicofol - Endosulfan sulfate - Endosulfans - Organochlorine pesticides - Organochlorines - Pollution level - Pollution prevention and controls - Principal Components - Residual levels - Surface soil - Xinjiang
Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 922.1 Probability Theory
DOI:10.3969/j.issn.1002-6819.2012.03.039
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 23>
Accession number:20120914812795
Title:Experiment and evaluating indicators of wheat threshing and separating on test-bed of longitudinal axial-threshing unit
Authors:Tang, Zhong (1); Li, Yaoming (1); Xu, Lizhang (1); Li, Hongchang (1); Pang, Jing (1)
Author affiliation:(1) Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Li, Y.(ymli@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:14-19
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For the problems of the heavy grain losing and huge power consuming in crops threshing and separating by China-made tangential-axial combine harvester, the tangential-threshing drum, assisted-feeding drum and longitudinal-axial-threshing drum taking from the tangential-axial combine harvester were used to establish a tangential-longitudinal-axial threshing-separating test-bed in the laboratory. The evaluating indicators of threshing and separating power consuming, and entrainment losing rate and unthreshing losing rate were obtained by threshing and separating performance on the test-bed with the wheat feeding rate of 7.5 kg/s. The threshing and separating power consuming, and entrainment losing rate were converted into complex amplitude indexes to establish the feasible region of the best threshing and separating performance indexes. The experiments showed that the optimal results of wheat threshing and separating were as follows: the total grain losing was 0.56%, power consuming was 66.64 kW, the optimal threshing and separating performance indexes was 0.8935 with the conditions of that the wheat feeding rate of 7.5 kg/s, and the liner speed of the tangential-threshing drum was 21.66 m/s, the threshing components of the tangential-threshing drum was knife tooth, the clearance between the Inlet/Outlet was 30/20 mm, the liner speed of the longitudinal-axial-separating drum was 19.63 m/s, and the threshing components of longitudinal-axial-separating drum was spike tooth and the gap of the threshing was 20 mm.
Number of references:16
Main heading:Agriculture
Controlled terms:Combines - Experiments - Feeding - Grain (agricultural product) - Harvesters - Indicators (instruments) - Optimization
Uncontrolled terms:Combine harvesters - Complex amplitude - Evaluating indicators - Feasible regions - Feeding rate - Longitudinal-axial-threshing drum - Optimal results - Performance indices - Power consuming - Separating power - Tangential-threshing drum - Threshing and separating
Classification code:691.2 Materials Handling Methods - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 901.3 Engineering Research - 921.5 Optimization Techniques - 944.3 Pressure Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2012.03.003
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 24>
Accession number:20120914812836
Title:Farmland consolidation conditional zoning and pattern analysis in Guangxi
Authors:Zhu, Jiankai (1); Liu, Yanfang (1); Liu, Xiejing (2); Deng, Xuankai (1)
Author affiliation:(1) School of Resource and Environment Science, Wuhan University, Wuhan 430079, China; (2) Land Consolidation and Rehabilitation Center, Department of Land Resources of Guangxi, Nanning 530028, China
Corresponding author:Liu, Y.(yfliu610@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:257-262
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Farmland consolidation zoning can guide consolidation project much more scientifically. An evaluation model of farmland consolidation zoning was established based on four factors of consolidation potential, ecological environment, natural conditions and socio-economic conditions, which were evaluated with multiple data. Based on GIS platform, the methods of cluster analysis and building principles of partition were used for farmland consolidation zoning by different conditions. Different patterns and their distribution were analyzed based on requirements of conditional zoning. The results showed that the potential of farmland consolidation was high and various conditions were good in central and southern Guangxi, which is the main area of farmland consolidation in the future, and suited for pattern of large-scale, low cost, high standard farmland construction. For other areas, slope modification and ecological prevention are important, but cost is higher. So it is worth of trying to introduce private capital for moderate scale consolidation in Guilin and Yulin.
Number of references:23
Main heading:Farms
Controlled terms:Cluster analysis - Consolidation - Ecology - Economics - Land use - Zoning
Uncontrolled terms:Consolidation projects - Ecological environments - Evaluation models - Farmland - Guangxi - High standards - Low costs - Multiple data - Natural conditions - Pattern analysis - Patterns - Private capital - Socio-economic conditions
Classification code:971 Social Sciences - 922 Statistical Methods - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723 Computer Software, Data Handling and Applications - 483 Soil Mechanics and Foundations - 454.3 Ecology and Ecosystems - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2012.03.044
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 25>
Accession number:20120914812809
Title:Effects of different tillage patterns during summer fallow on soil water conservation and crop water use efficiency
Authors:Hou, Xianqing (1); Li, Rong (1); Han, Qingfang (1); Wang, Wei (1); Jia, Zhikuan (1)
Author affiliation:(1) Chinese Institute of Water-saving Agriculture, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Key Laboratory of Crop Production and Ecology, Minister of Agriculture, Northwest Agriculture and Forestry University, Yangling, 712100, China; (3) College of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Jia, Z.(zhikuan@tom.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:94-100
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 seek the effects of different tillage patterns during summer fallow on soil water conservation and crop water use efficiency, a field study was conducted to determine the effect of conservation tillage on soil water and winter wheat yield in arid areas of southern Ningxia from 2007 to 2010. Tillage treatments comprised NT/ST/NT (no-tillage in first year, subsoiling tillage in second year, again no-tillage in third year), ST/NT/ST (subsoiling tillage in first year, no-tillage in second year, again subsoiling tillage in third year), CT (conventional tillage in 3 years). The results showed that conservation tillage patterns could improve soil water condition in wheat field and significantly increase crop yield and water use efficiency. At the end of summer follow period, compared with CT, the 3-year mean soil water storage of NT/ST/NT and ST/NT/ST treatments in the 0-200 cm soil layers increased by 3.92% and 7.84% (P<0.05), the 3-year mean fallow rainfall storage efficiency increased by 13.64% and 22.80% (P<0.05), respectively. During wheat growing season, the 3-year mean soil water storage (0-200 cm) in NT/ST/NT and ST/NT/ST increased by 7.96% and 8.60% (P<0.05), mean growing season rainfall use efficiency increased by9.59% and 10.69% (P<0.05), mean year rainfall use efficiency increased by9.52% and 10.65% (P<0.05), respectively. Compared to CT, the 3-year mean wheat yield for NT/ST/NT and ST/NT/ST increased by 9.59% and 10.69% (P<0.05), mean grain yield water use efficiency increased by 7.17% and 7.68% (P<0.05), mean biomass yield water use efficiency increased by 3.83% and 4.34% (P<0.05), respectively.
Number of references:31
Main heading:Agricultural machinery
Controlled terms:Arid regions - Crops - Efficiency - Moisture - Rain - Soil moisture - Soils - Water conservation - Water supply
Uncontrolled terms:Arid area - Biomass yield - Conservation tillage - Conventional tillage - Crop water use - Crop yield - Field studies - First year - Grain yield - Growing season - No tillage - Soil layer - Soil water - Soil water storage - Soil-water conservation - Storage efficiency - Summer fallow - Tillage patterns - Tillage treatment - Use efficiency - Water use efficiency - Wheat fields - Wheat yield - Winter wheat
Classification code:913.1 Production Engineering - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 483.1 Soils and Soil Mechanics - 446.1 Water Supply Systems - 444 Water Resources - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2012.03.017
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 26>
Accession number:20120914812833
Title:Land use scenarios simulation of Foshan city based on gray model and cellular automata model
Authors:Wang, Liping (1); Jin, Xiaobin (1); Du, Xindong (1); Zhou, Yinkang (1)
Author affiliation:(1) School of Geographic and Oceangraphic Science, Nanjing University, Nanjing, 210093, China
Corresponding author:Jin, X.(jinxb@nju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:237-242
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:LUCC model is an efficient tool to analysis the processes and consequences of land use systems, and to support land use planning and policy. According to the problem that constructive land expansion is the main reason for land use change in Foshan city, based on remote sensing data of land use change with spatial resolution of 30 m, the paper choose grey model as quantitative model and the cellular automata model as spatial model to simulate the land use pattern of 2015 by setting different scenario conditions. Results showed that in three kinds of expansion circumstances of, constructive land, the area of constructive land increased 27830, 21645 and 15461 hm<sup>2</sup> respectively, the corresponding proportion of the cultivated land was 42.28%, 48.38% and 55.96% respectively. This indicates that cultivated land is still the main source of constructive land expansion, the contradiction between cultivated land protection and economic development will further expend.
Number of references:29
Main heading:Land use
Controlled terms:Cellular automata - Computer simulation - Economics - Expansion - Models - Remote sensing
Uncontrolled terms:Cellular automata models - Cultivated lands - Economic development - Foshan City - Gray Model - Grey Model - Land use pattern - Land Use Planning - Land-use change - Land-use scenario - Land-use systems - Quantitative models - Remote sensing data - Scenarios simulation - Spatial models - Spatial resolution
Classification code:951 Materials Science - 921 Mathematics - 902.1 Engineering Graphics - 971 Social Sciences - 731.1 Control Systems - 723 Computer Software, Data Handling and Applications - 403 Urban and Regional Planning and Development - 723.5 Computer Applications
DOI:10.3969/j.issn.1002-6819.2012.03.041
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 27>
Accession number:20120914812823
Title:Measurement and control system for commonness parameters of agricultural equipment based on ARM
Authors:Zhang, Chengtao (1); Tan, Yu (1); Wu, Gang (1); Wang, Shumao (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) Automotive Department, Guangxi Institute of Technology, Liuzhou 545006, China
Corresponding author:Tan, Y.(tanyu32@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:177-183
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Performance parameters characteristics of agricultural equipment were analyzed, and the measurement and control system for commonness parameter of agricultural equipment was developed based on ARM embedded technology, with the performance of measuring commonness parameter and testing comprehensive performance for agricultural equipment. The multithreading technology was used to meet the real-time data acquisition and control for various signals and the friendly interface application software was developed on the hardware platform which consists of S3C2410A and peripheral hardware circuits. This system could provide up to 34 channels. The results of measurement and field experiment showed that its analog channels linear error was 0.38% and the error of counting channel and frequency channel were all 1 Hz. The testing accuracy and reliability of this system was applicable to performance parameters measurement of agricultural equipment. This development can effectively enhance the method of measuring agricultural equipment's performance, and has high practicability.
Number of references:24
Main heading:Equipment
Controlled terms:Agricultural machinery - Control systems - Data acquisition - Design - Multitasking
Uncontrolled terms:Agricultural equipment - Analog channels - ARM - Commonness parameter - Comprehensive performance - Embedded technology - Field experiment - Frequency channels - Hardware circuits - Hardware platform - Interface applications - Measurement and control - Multi-threading - Performance parameters - Real-time data acquisition - Testing accuracy
Classification code:408 Structural Design - 722.4 Digital Computers and Systems - 723.2 Data Processing and Image Processing - 731.1 Control Systems - 821.1 Agricultural Machinery and Equipment - 901 Engineering Profession
DOI:10.3969/j.issn.1002-6819.2012.03.031
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 28>
Accession number:20120914812806
Title:Modeling and optimization of transverse flux permanent magnet generator
Authors:Bao, Guangqing (1); Zheng, Wenpeng (2); Jiang, Jianzhong (2); Mao, Kaifu (1)
Author affiliation:(1) School of Electrical Engineering and Automation, Lanzhou University of Technology, Lanzhou 730050, China; (2) School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China
Corresponding author:Bao, G.(Baogq03@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:74-80
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:Transverse Flux Permanent Magnet Generator (TFPMG) is a new but appears to be interesting candidate in direct-driven wind turbines for high electromotive force (EMF) density in air-gap and high efficiency at low speed. However, the output voltage of TFPMG with high quality is the crucial issue for back to back converter. To lower harmonic contents of EMF, a novel modeling and optimization method which incorporates Least Squares Support Vector Machines (LSSVM), Orthogonal Design Method (ODM), and Particle Swarm Optimization (PSO) in generator design procedure was presented. Based on the three-dimensional finite element method with scalar potential, the relationships between the machine parameters with leakages were investigated. The ODM was used to generate geometric information of trial samples. Function approximation of sample information performed by the LSSVM regression analysis provides an efficient way for parameters optimization with large-scale iterative computation. With the global search ability as well as the independence on original solution characteristics, PSO algorithm was employed to find the optimal design, which can guarantee the harmonic coefficients of non-load output voltage up to 14.36%, lower than original design. The measured result obtained from a 1.5 kW prototype test rig evaluates the effectiveness of the nonparametric modeling and the optimization method.
Number of references:21
Main heading:Design
Controlled terms:Algorithms - Electric generators - Electromotive force - Finite element method - Odor control - Optimal systems - Optimization - Permanent magnets - Regression analysis
Uncontrolled terms:Air-gaps - Back-to-back converter - Direct-driven wind turbine - Function approximation - Generator design - Geometric information - Global search ability - Harmonic coefficients - Harmonic contents - High quality - Iterative computation - Least squares support vector machines - Low speed - Machine parameters - Measured results - Modeling and optimization - Non-parametric modeling - Optimal design - Optimization method - Original design - Orthogonal design - Orthogonal design method - Output voltages - Parameters optimization - Particle swarm algorithm - Prototype tests - PSO algorithms - Sample information - Scalar potential - Solution characteristics - Support vector - Three-dimensional finite element method - Transverse flux permanent magnets
Classification code:921 Mathematics - 801.4.1 Electrochemistry - 723 Computer Software, Data Handling and Applications - 922.2 Mathematical Statistics - 705.2 Electric Generators - 445.1 Water Treatment Techniques - 408 Structural Design - 704.1 Electric Components
DOI:10.3969/j.issn.1002-6819.2012.03.014
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 29>
Accession number:20120914812815
Title:Three-dimensional numerical simulation for immersion prediction of left bank of Songyuan reservoir project
Authors:Luo, Zujiang (1); Yang, Lin (1); Li, Zhanjun (2); Wang, Junjie (2)
Author affiliation:(1) School of Earth Science and Engineering, Hohai University, Nanjing 210098, China; (2) China Water Northeastern Investigation Design and Research Co. Ltd., Changchun 130021, China
Corresponding author:Luo, Z.(luozujiang@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:129-134
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Aiming at the immersion problem caused by impoundment in plain area, taking the Songyuan reservoir project as an example, and on the base of generalizing the hydrogeologic structure of the left bank of Songyuan reservoir for a minding model, a three-dimensional transient flow numerical simulation model for predicting the immersion of the left bank of Songyuan reservoir project was built. The theory of three-dimensional finite difference numerical simulation was applied and the immersion area was obtained by simulation according to four impoundment schemes of non-diaphragm wall from the end of each month of April to October and with 4.05, 8.05 and 12.05 km diaphragm wall in the end of August. The results show that the total area of minimum immersion of non-diaphragm wall scheme is 127.62×10<sup>4</sup> m<sup>2</sup> in April, and then gradually increases. It reaches the maximum with 1473.94×10<sup>4</sup> m<sup>2</sup> in August, and then decreases. As the diaphragm walls are arranged along the left bank of reservoir in the unconfined aquifer, the immersion area decreases slightly.
Number of references:15
Main heading:Three dimensional
Controlled terms:Aquifers - Diaphragms - Forecasting - Hydrogeology - Numerical methods - Transition flow - Walls (structural partitions)
Uncontrolled terms:Diaphragm wall - Finite difference - Hydrogeologic structure - Immersion - Numerical simulation models - Three-dimensional numerical simulations - Transient flow - Unconfined aquifers
Classification code:921 Mathematics - 902.1 Engineering Graphics - 631.1 Fluid Flow, General - 921.6 Numerical Methods - 601.2 Machine Components - 444.2 Groundwater - 402 Buildings and Towers - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2012.03.023
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 30>
Accession number:20120914812798
Title:Parameter optimization of non-overload centrifugal pump
Authors:Wang, Yang (1); Liu, Jieqiong (1); He, Wenjun (1)
Author affiliation:(1) Technology and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Liu, J.(liujieqiong6@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:33-37
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 power curve of low specific speed centrifugal pump sharply rises with the increase of flow rate, the ratio of maximum power and power of design-point is much larger than the corresponding value of general centrifugal pumps. This feature could easily cause supporting electrical overload in large flow area. In order to achieve non-overload performance and ensure the reliability of pump operation, the IS50-32-160 non-overload centrifugal pump was optimally designed by changing geometrical parameters of the impeller and clogging part of flow passages. Software Fluent was used to research the relationship between the ratio of effective area between the inlet and the outlet of the flow passages between two blades which was called F<inf>II</inf>/F<inf>I</inf>, and the performance of the low specific speed centrifugal pump. When the quarter of flow passages were clogged and F<inf>II</inf>/F<inf>I</inf> was 1.17, the efficiency curve was smooth and the extreme value appeared in large flow area of the shaft power curve, then the non-overload performance came true. The method can effectively improve the hydraulic performance of non-overload pump on the premise of the non-overload performance.
Number of references:21
Main heading:Centrifugal pumps
Controlled terms:Curve fitting - Design - Inlet flow - Optimization
Uncontrolled terms:Area proportion - Effective area - Efficiency curves - Extreme value - Flow area - Flow passage - Geometrical parameters - Hydraulic performance - Low specific speed centrifugal pump - Maximum power - Parameter optimization - Power curves - Pump operation - Shaft power - Software FLUENT - Two-blade
Classification code:408 Structural Design - 618.2 Pumps - 631.1 Fluid Flow, General - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.03.006
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 31>
Accession number:20120914812818
Title:Indicators selecting model for applicability evaluation of greenhouse intelligent control system
Authors:Li, Lin (1); Zhang, Lingxian (1); Li, Daoliang (1); Qin, Xiangyang (2); Liu, Xue (1)
Author affiliation:(1) Department of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) National Engineering Research Center for Information Technology in Agriculture, Beijing 100083, China
Corresponding author:Liu, X.(liuxcau@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
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:In order to solve the problem of randomness and repetitiveness, the paper explored the methodology for selection and optimization of indicators for the applicability evaluation of greenhouse intelligent control systems indicators based on analyzing the factors influencing the greenhouse intelligent control system. An indicator selection model for applicability assessment of greenhouse intelligent control system was constructed and Shouguang Vegetable Greenhouse was taken as an example for empirical study, which showed that the indicators could be optimized from 32 to 22 by using the selection model and the completeness of indexes system reached as high as 88.96%. Consequently, the objective to reduce the randomness, completeness and simplicity of indicators selection can achieve. The results can provide a foundation for further applicability evaluation of greenhouse intelligent control systems.
Number of references:18
Main heading:Greenhouses
Controlled terms:Intelligent control - Models - Optimization - Random processes
Uncontrolled terms:Applicability evaluation - Empirical studies - Indexes system - Selection model
Classification code:402.1 Industrial and Agricultural Buildings - 731.1 Control Systems - 902.1 Engineering Graphics - 921.5 Optimization Techniques - 922.1 Probability Theory
DOI:10.3969/j.issn.1002-6819.2012.03.026
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 32>
Accession number:20120914812802
Title:Light design of frame for self-propelled chassis rice transplanter
Authors:Zhang, Nana (1); Zhao, Yun (1); Liu, Hongxin (2)
Author affiliation:(1) College of Mechanical Engineering and Automation, Zhe Jiang Sec-Tech University, Hangzhou 310018, China; (2) Mechanical Engineering Department, College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Zhao, Y.(zhaoyun@zstu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:55-59
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A type of high-speed rice transplanter frame was studied in the paper, and the three-dimensional modeling software UG was used for its parametric modeling, then the model was imported to FEA software ANSYS Workbench to analysis the frame. Different experimental conditions were simulated to calculate stress and deformation of the frame, and the stress of the main deformed part was measured. Then the calculated results were compared with experimental data, and the correctness of FEM results was verified. Based on the results of FEA, a frame model of optimal design was established, and one more reasonable lightweight design proposal was made by calculating. Through the optimization and improvement, the weight of the frame decreased by 16.77%, which showed the optimization program was economical and feasibility.
Number of references:15
Main heading:Three dimensional
Controlled terms:Agricultural machinery - Design - Finite element method - Optimization
Uncontrolled terms:A-frames - ANSYS workbench - Experimental conditions - Experimental data - FEA software - Finite Element - Frame - High-speed - Lightweight - Lightweight design - Optimal design - Optimization programs - Parametric modeling - Rice transplanter - Stress and deformation - Three-dimensional modeling
Classification code:408 Structural Design - 821.1 Agricultural Machinery and Equipment - 902.1 Engineering Graphics - 921.5 Optimization Techniques - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2012.03.010
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 33>
Accession number:20120914812842
Title:Study on scale bio-adhesion force and scaling properties for freshwater fish
Authors:Wang, Jiujiu (1); Zong, Li (1); Xiong, Shanbo (2)
Author affiliation:(1) College of Engineering, Huazhong Agricultural University, Wuhan 430070, China; (2) Sub Centre (Wuhan) of National Technology and R and D of Staple Freshwater Fish Processing, Wuhan 430070, China
Corresponding author:Zong, L.(zongli@mail.hzau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:288-292
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To study the factors affecting the scaling of freshwater fish, carp, grass carp, crucian carp and silver carp were taken as research objects, and TMS-PRO type texture analyzer was used to measure the bio-adhesion force between fish scales and their bodies. Three factors that influence on the bio-adhesion force of fish scale, including the position of fish scales, the loading rate and the time of death, were studied. Then the number of scales in unit area and friction angles of freshwater fishes were measured, and scaling experiments was conducted. The relationship between the bio-adhesion forces of fish scales and the effect of scaling were analyzed and verified. The results show that scaling of freshwater fish will be more difficult when the bio-adhesion force is bigger. This study can provide a reference for design of scaling device for freshwater fish.
Number of references:18
Main heading:Adhesion
Controlled terms:Descaling - Fish - Friction - Metal cleaning - Tribology
Uncontrolled terms:Bio-adhesion - Crucian carp - Fish scale - Freshwater fishes - Friction angle - Friction angles - Grass carp - Loading rate - Research object - Scaling experiments - Scaling properties - Silver carp - Texture analyzers
Classification code:931.1 Mechanics - 931 Classical Physics; Quantum Theory; Relativity - 822 Food Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 951 Materials Science - 801 Chemistry - 539 Metals Corrosion and Protection; Metal Plating - 471 Marine Science and Oceanography - 461 Bioengineering and Biology - 539.1 Metals Corrosion
DOI:10.3969/j.issn.1002-6819.2012.03.050
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 34>
Accession number:20120914812796
Title:Design and testing of rumen simulation system with discharging solid chime, liquid, and gas respectively
Authors:Shen, Weijun (1); Jiang, Yahui (2); Wang, Jiaqi (2); Bu, Dengpan (2); Sun, Peng (2); Jin, Enwang (2); Bao, Wanhua (2); Shi, Haoting (2)
Author affiliation:(1) College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China; (2) Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (3) College of Biological Sciences, China Agricultural University, Beijing 100193, China
Corresponding author:Wang, J.(wang-jia-qi@263.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:20-26
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To overcome the disadvantages of the present rumen simulated apparatus, a novel auto-controlled and continuous cultural rumen simulate system was designed, in which solid chime, liquid and gas were constructed in sealed condition. After 10 days testing experiments, the results showed that pH values in all 4 fermenters were stable and consistent with the condition that of in vivo from 5th d to the end of the experiment; protozoal counts kept at (0.99±0.32)×10<sup>4</sup> (p=0.6877) and the concentration of NH<inf>3</inf>-N in the overflowed liquid maintained stably at (3.91±1.10) mg/100 mL; the rate of total dry matter disappearance, the total times of venting gas and the concentration of total volatile fatty acids were 62%±2%, (2370±33) and (41.77±3.78) mmol/L (p=0.488), respectively. So, this novel rumen simulate system showed high similarity to bovine rumen fermentation in vivo according to the above parameters and can used to mimic the rumen fermentation in vitro.
Number of references:17
Main heading:Liquids
Controlled terms:Batch cell culture - Design - Equipment - Experiments - Fermentation - Measurements - Volatile fatty acids
Uncontrolled terms:Batch culture - Continuous culture - Dry matters - In-vitro - In-vivo - pH value - Rumen - Simulation systems - Total volatile fatty acids
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 - 901.3 Engineering Research - 901 Engineering Profession - 804.1 Organic Compounds - 802.2 Chemical Reactions - 461.2 Biological Materials and Tissue Engineering - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2012.03.004
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 35>
Accession number:20120914812832
Title:Dynamic changes of land use type and carbon sinks based RS and GIS in Pingshuo opencast coal mine
Authors:Zhang, Zhao (1); Bai, Zhongke (1); He, Zhenwei (3); Bao, Nisha (1)
Author affiliation:(1) School of Land Science and Technology, China University of Geosciences, Beijing 100083, China; (2) Key Laboratory of Land Recosolidation and Rehabilitation, Ministry of Land and Resources, Beijing 100035, China; (3) Chinacoal Pingshuo Coal Limited Liability Company, Shuozhou 036006, China
Corresponding author:Bai, Z.(baizk@cugb.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:230-236
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 effect of land reclamation and ecological rehabilitation in mining area on the biogeochemical cycle of carbon, the changes of land use type and "carbon sinks" storage in mining area of 33 years from 1976 to 2009 in Pingshuo opencast mining area were analyzed by remote sensing interpretation. The results showed that the type of land use had a great change, all of the arable land (3346.35 hm<sup>2</sup>) and forest (906.45 hm<sup>2</sup>) were changed into industrial square, stripping district, open pit, unreclaimed dump and reclaimed dump. The carbon sinks and carbon sequestration value in mine ecosystem, decreased from 602040.22 t and 63214.22 million RMB of 1976 to 351173.50 t and 36873.22 million RMB of 2009 respectively. In the period of 1990-1996 and 2001-2005, the carbon sequestration in mine ecosystem showed an ascending trend. By setting the scenarios in the study area of three land use types planed in 2009, no any reclamation measures, conventional reclamation measures and ecological reclamation were simulated. The simulation results showed that carbon sequestration of three land use types were 62279.57, 961622.2 and 1250108.86 t respectively, which indicated that the carbon sinks in land reclamation has been in principal position of the whole carbon sinks in mining area ecosystem.
Number of references:22
Main heading:Carbon
Controlled terms:Coal mines - Ecosystems - Land reclamation - Land use - Mines - Open pit mining - Reclamation - Remote sensing
Uncontrolled terms:Arable land - Biogeochemical cycle - Carbon sequestration - Carbon sink - Carbon sink value - Dynamic changes - Ecological rehabilitation - Land use type - Mining areas - Open pit - Open-cast mining - Opencast Coal Mine - Remote sensing interpretation - RS and GIS - Study areas
Classification code:804 Chemical Products Generally - 731.1 Control Systems - 503.1 Coal Mines - 502.1 Mine and Quarry Operations - 454.3 Ecology and Ecosystems - 452.4 Industrial Wastes Treatment and Disposal - 442.2 Land Reclamation
DOI:10.3969/j.issn.1002-6819.2012.03.040
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 36>
Accession number:20120914812826
Title:Topology and modulation of asymmetrical hybrid multilevel inverter
Authors:Zheng, Hong (1); Huang, Jian (1); Sun, Yukun (1); Shi, Yuli (1)
Author affiliation:(1) College of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Zheng, H.(hzheng@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:198-202
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 novel topology, referred to as asymmetrical hybrid multilevel inverter topology, was developed to solve the problems of enormous number of switching devices and low quality of output voltage of conventional multilevel inverter. It consists of asymmetrical multilevel inverter with clamped diodes and H-bridge multilevel inverter with the voltage source switchover between series state and parallel state. Under the same voltage levels, the number of switching devices reduced. The paper also presented a new modulation strategy, by which the most of switching devices can work at low frequency, the current backflow can be avoided with reduced switching loss and total harmonic distortion (THD) of output voltage, and then the amplitude modulation of continuous PWM can be realized. The validity of the proposed topology and control method was verified by simulation results.
Number of references:15
Main heading:Electric inverters
Controlled terms:Electricity - Harmonic distortion - Switching - Topology - Voltage regulators
Uncontrolled terms:Backflow - Control methods - H-bridges - Hybrid moderation - Hybrid multilevel inverter - Low frequency - Low qualities - Multilevel inverter - New modulation - Output voltages - Reduced switching - Switching devices - Switchover - Total harmonic distortions - Voltage levels - Voltage source
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 704.2 Electric Equipment - 716.1 Information Theory and Signal Processing - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 732.1 Control Equipment - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
DOI:10.3969/j.issn.1002-6819.2012.03.034
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 37>
Accession number:20120914812805
Title:Effect of droplet size, leaf characteristics and angle on pesticide deposition
Authors:Yang, Xiwa (1); Dai, Meiling (1); Song, Jianli (1); Zhao, Jinkai (2); He, Xiongkui (1)
Author affiliation:(1) College of Science, China Agricultural University, Beijing 100183, China; (2) Beijing Fengmao Plant Protection Machinery Co. Ltd., Beijing 101407, China
Corresponding author:He, X.(xiongkui@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:70-73
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:Effect of droplet size, leaf characteristics and angle on pesticide deposition was investigated to increase the pesticide usage efficiency. Nozzles of ST110-01, ST110-02, ST110-03, ST110-04, ST110-05 and IDK120-03 were compared with leaf angles at 0°, 15°, 30°, 45°, 60° and 75° on cotton, rice and wheat, respectively. The results demonstrated that leaf characteristics and angle had a significant effect on deposition, while the effects of nozzle type or droplet size were not significant. The deposition increased as the leaf angle decreased. The micro-structure of leaf may cause the different deposition. The research involved in this paper will provide the valuable basis for the pesticide efficiency enhancement.
Number of references:17
Main heading:Pesticide effects
Controlled terms:Deposition - Drops - Pesticides - Spray nozzles - Spraying
Uncontrolled terms:Droplet sizes - Efficiency enhancement - Leaf angle - Leaf characteristics - Pesticide deposition - VMD
Classification code:443.1 Atmospheric Properties - 631.1 Fluid Flow, General - 803 Chemical Agents and Basic Industrial Chemicals - 813.1 Coating Techniques
DOI:10.3969/j.issn.1002-6819.2012.03.013
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 38>
Accession number:20120914812837
Title:Application of ultra weak photon emission in evaluation of egg freshness
Authors:Xi, Gang (1); Liu, Kai (1); Xu, Yongkui (1); Hu, Hailong (1); Xu, Jun (1)
Author affiliation:(1) School of Science, Xi'an University of Technology, Xi'an 710048, China
Corresponding author:Xi, G.(xig@xaut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:263-268
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore application of the ultra weak photon emission in evaluation and detection of eggs freshness, the spontaneous luminescence (SL) and the delayed luminescence (DL) of ultra weak photon emission in eggs at the storage temperature of 25°C and 40°C were studied respectively. The results showed that the intensity of SL slowly increased and the initial intensity of DL slowly decreased with storage time at the storage temperature of 25°C. In reverse, the intensity of SL rapidly increased and the initial intensity of DL rapidly decreased with storage time at the storage temperature of 40°C. The DL of eggs obeyed the law of hyperbolic relaxation. The state parameters of egg based on the integral intensity of DL and the SL intensity in unit time were defined in the paper. There was a good linear relationship between the state parameters of egg and Haugh unit at the storage temperature of 25°C and 40°C. It showed that the state parameters of egg could be a quantitative criterion for assessing the freshness of eggs.
Number of references:22
Main heading:Photons
Controlled terms:Light - Light emission - Luminescence
Uncontrolled terms:Eggs - Evaluation - Freshness - Photon emissions - Tempevature
Classification code:741.1 Light/Optics
DOI:10.3969/j.issn.1002-6819.2012.03.045
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 39>
Accession number:20120914812841
Title:Acoustic detecting system for sugar content of watermelon
Authors:Wei, Yanjun (1); Rao, Xiuqin (1); Qi, Bing (1)
Author affiliation:(1) School of Food and Biology of Zhejiang University, Hangzhou 310058, China
Corresponding author:Rao, X.(xqrao@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:283-287
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:An acoustic system was developed to detect the sugar content of watermelon nondestructively, which consists of a steel ball wrapped with rubber, 6 piezoelectric accelerate sensors, an electricity amplifier, an optical trigger, a data acquisition card and a computer. Acoustic transmissivity can be calculated from the amplitude spectrum. And 6 characteristic frequencies, 752, 869, 1001, 4556, 322, 3950 Hz, were chosen with the function of SMLR (Stepwise Multiple Linear Regression) using TQ software. The acoustic transmissivity at frequencies were used to setup a multi regression models for the detection of watermelon sugar content. 47 watermelons were tested, and the results showed that the best detection model can be obtained by tapping the equator part and receiving the signals from the opposite side with watermelon being put in its growing position, the R value was 0.80753, RMSEC was 0.646, RMSEP was 0.655. The research proved the possibility of the system in detection of sugar content of watermelon and can provide a reference for further research in this area.
Number of references:24
Main heading:Sugars
Controlled terms:Acoustic fields - Acoustics - Models - Regression analysis - Testing
Uncontrolled terms:Acoustic systems - Amplitude spectra - Characteristic frequencies - Data acquisition cards - Detecting systems - Detection models - Multi-regression model - Optical triggers - R value - Steel balls - Stepwise multiple linear regression - Sugar content - Transmissivity - Watermelon
Classification code:423.2 Non Mechanical Properties of Building Materials: Test Methods - 751 Acoustics, Noise. Sound - 804.1 Organic Compounds - 902.1 Engineering Graphics - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2012.03.049
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 40>
Accession number:20120914812827
Title:Estimation of maize planting area based on wavelet fusion of multi-resolution images
Authors:Gu, Xiaohe (1); Han, Lijian (2); Wang, Jihua (1); Huang, Wenjiang (1); He, Xin (1)
Author affiliation:(1) Beijing Agriculture Information Technology Research Center, Beijing 100097, China; (2) Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori 680-0001, Japan
Corresponding author:Huang, W.(huangwj@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:203-209
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The integration of mid-coarse-resolution remote sensing images provides abundant information, and therefore tends to be a popular way in large scale crop planting area estimation. This research utilized conventional MODIS and TM records to present an instance in large area maize planting area estimation. The wavelet fusion was adopted for obtaining normalized difference vegetation index (NDVI) with a spatial resolution of 30 m from both MODIS and TM images. And the standard growing curves of main fall crops were then constructed with the NDVI time series, which indicating crops difference in phenology. Minimum distance classification was carried out with the NDVI time series for mapping maze sown area in a typical maize-planting county, Yuanyan, Henan province. The result was validated with the in-situ parcels, which showing a better gross and position accuracies (89% and 90%) than those with either MODIS or TM records. The research can provide an efficient way with abundance information from both mid and coarse resolution records, and thus improve the applicability of remote sensing in large area crop area estimation.
Number of references:18
Main heading:Estimation
Controlled terms:Crops - Forestry - Image reconstruction - Phenols - Radiometers - Remote sensing - Thulium - Time series - Wavelet transforms
Uncontrolled terms:Area estimation - Area-based - Henan Province - In-situ - Maize - Minimum distance - MODIS - Multiresolution images - NDVI time series - Normalized difference vegetation index - Planting area - Position accuracy - Remote sensing images - Spatial resolution - TM image - Wavelet fusion
Classification code:922.2 Mathematical Statistics - 921.3 Mathematical Transformations - 921 Mathematics - 821.4 Agricultural Products - 944.7 Radiation Measuring Instruments - 821.0 Woodlands and Forestry - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 547.2 Rare Earth Metals - 804.1 Organic Compounds
DOI:10.3969/j.issn.1002-6819.2012.03.035
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 41>
Accession number:20120914812834
Title:Land use characteristics and its spatial distribution of Songnen High Plain based on quantitative geography model
Authors:Song, Ge (1); Sun, Lina (1); Lei, Guoping (1)
Author affiliation:(1) College of Resources and Environment, Northeast Agriculture University, Harbin 150030, China
Corresponding author:Song, G.(songgelaoshi@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:243-250
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 study on the land use characteristics and its spatial distribution is the foundation of realizing the reasonable exploiting and utilization of regional land. Taking Songnen High Plain typical region Bayan county as the research area, based on the vector data base of land use change survey of Bayan county in 2006, combining the methods of quantitative geography model and modern geographic information space analysis technique, the paper explored using the land use overall combination types, land use comprehensive degree and the regional meanings of each land use type to express the quantity characteristics of land use of the eighteen towns of Bayan, so as to analysis the spatial distribution characteristics. The results showed that land use quantity characteristics existed certain differences in overall, the land use combination type of the 18 towns showed weakly for the overall land function. Land use degrees showed a big difference, and the regional meanings of cultivated land and water area were prominent relatively. The general characteristics of spatial distribution showed relatively complex of all the patch shapes. The cultivated land and forest land were relatively regular and intensively distributed, which were regional landscape matrix, while the unused land and other agricultural land distribute most discretely.
Number of references:28
Main heading:Land use
Controlled terms:Landforms - Models - Spatial distribution - Technology
Uncontrolled terms:Agricultural land - Bayan county - Cultivated lands - Distribution characteristics - Forest land - Geographic information - Land use type - Land-use change - matrix - Regional landscapes - Research areas - Vector data - Water areas
Classification code:403 Urban and Regional Planning and Development - 481.1 Geology - 901 Engineering Profession - 902.1 Engineering Graphics
DOI:10.3969/j.issn.1002-6819.2012.03.042
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 42>
Accession number:20120914812813
Title:Spatio-temporal variation of water and heat fluxes over complex hilly topography in upper reaches of Lijiang river
Authors:Wang, Xiuxin (1); Wang, Peijuan (3); Zhu, Qijiang (2)
Author affiliation:(1) College of Computer Science and Information Technology, Guangxi Normal University, Guilin 541004, China; (2) State Key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, Beijing 100875, China; (3) Chinese Academy of Meteorological Science, Beijing 100081, China
Corresponding author:Wang, X.(xxwangbnu@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:118-122
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Land surface water and heat fluxes are the main factors affecting local microclimate. In order to evaluate the impact of agricultural and forest economical development of the upper reaches of Lijiang river on environment, the fluxes were retrieved with improved SEBAL model from five TM/ETM images of the upper reaches of Lijiang river during 1989 to 2006 by computation of surface solar radiation in complex hilly topography. Normalized water and heat fluxes were proposed so that they could be compared between different temporal domains. Results showed that while vegetation coverage increased, sensible heat flux(H) decreased and latent heat flux (LE) increased. The influence was very obvious while vegetation coverage ranged from 0.2 to 0.7. Average vegetation coverage decreased sharply from 1989 to 1991, and increased gradually from 2000 to 2006. It respectively resulted in great enhancement and then gradually fall in average Bowen ratio (ratio of H to LE) and in pixels with higher normalized sensible heat flux, as well as proportional fall and then rise in pixels with higher normalized latent heat flux. Although average vegetation coverage in 2006 approached that in 1989, average Bowen ratio was still greater than that in 1989. The enhancement of average ratio of sensible heat flux to latent heat flux results from the increase of economical forests and agricultural dry land, the decrease of broadleaf forest coverage, and the shrinkage and degradation of water source forest in the study area.
Number of references:21
Main heading:Heat flux
Controlled terms:Forestry - Landforms - Models - Pixels - Remote sensing - Rivers - Sun - Surface topography - Vegetation
Uncontrolled terms:Bowen ratio - Broadleaf forest - Dry land - Economical development - Land surface - SEBAL model - Sensible heat flux - Spatio-temporal variation - Study areas - Surface solar radiation - Temporal domain - Vegetation coverage - Water source
Classification code:902.1 Engineering Graphics - 821.0 Woodlands and Forestry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 731.1 Control Systems - 931.2 Physical Properties of Gases, Liquids and Solids - 723.5 Computer Applications - 641.2 Heat Transfer - 481.1 Geology - 407.2 Waterways - 657.2 Extraterrestrial Physics and Stellar Phenomena
DOI:10.3969/j.issn.1002-6819.2012.03.021
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 43>
Accession number:20120914812797
Title:Experiment and analysis on oxidation characteristics of diesel engine particulates by La<inf>2</inf>Cu<inf>(1-x)</inf>Fe<inf>x</inf>O<inf>4</inf> catalysts
Authors:Chen, Zhaohui (1); Li, Zhijun (2); Zhang, Wenfei (2); Jiao, Penghao (2); Gao, Libo (2); Liu, Lei (2); Ma, Zhi (3)
Author affiliation:(1) City College, Kunming University of Science and Technology, Kunming 650051, China; (2) State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China; (3) School of Chemical Engineering and Technology, Tianjin 300072, China
Corresponding author:Li, Z.(lizhijundd@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
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:Prepared series of La<inf>2</inf>A<inf>X</inf>B<inf>1-X</inf>O<inf>4</inf> catalysts and soot particles were mixed, then were placed in fixed-bed continuous flow reaction system to do simulation tests to evaluate catalytic activities. It was found that La<inf>2</inf>Cu<inf>0.9</inf>Fe<inf>0.1</inf>O<inf>4</inf> showed better PM oxidation characteristic, which was consistent with the H<inf>2</inf>-TPR experiment results. TG-DTA tests also indicated solid reliability of the experiment results. Temperature-programmed tests were taken on cordierite and SiC catalytic substrate respectively. The results suggested that soot particles on the two kinds of substrate showed similar oxidation characteristics in temperature window 200-350°C. Engine bench tests also validated that La<inf>2</inf>Cu<inf>0.9</inf>Fe<inf>0.1</inf>O<inf>4</inf> could oxidize diesel emission soot particles efficiently. Computational model was established to simulate DPF soot loading and regeneration. The model was verified by engine bench test results, which suggested that the model was able to describe diesel soot particles oxidation process precisely.
Number of references:13
Main heading:Experiments
Controlled terms:Catalyst activity - Diesel engines - Dust - Oxidation - Silicate minerals - Silicon carbide - Soot
Uncontrolled terms:Catalytic substrates - Computational model - Continuous flow reaction - Diesel emission - Diesel soot - Engine bench tests - Experiment and analysis - Fixed-bed - Oxidation process - Simulation tests - Soot loading - Soot particles - Temperature window
Classification code:451.1 Air Pollution Sources - 482.2 Minerals - 612.2 Diesel Engines - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2012.03.005
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 44>
Accession number:20120914812810
Title:Influence of rewatering on compensatory effect of maize seedling roots with diluted seawater irrigation
Authors:Liu, Hongzhan (1); Zheng, Wei (2); Zheng, Fengrong (2); Wang, Lining (1)
Author affiliation:(1) Marine College of Shandong University at Weihai, Weihai 264209, China; (2) First Institute of Oceanography, SOA, Qingdao 266061, China
Corresponding author:Zheng, F.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
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:In order to use seawater as supplement water to realize water-saving irrigation in coastal areas, taking the resistant maize "Nongda 108" as study object, some compensatory characteristics related to the roots of seedlings were studied under different treatments. Firstly the seedlings were irrigated with different salinity seawater, then irrigated with freshwater and lastly treated with polyethylene glycol (PEG) solution to simulate the drought stress. The results indicated that, under the irrigation of sustained 25% seawater and alternate 25% seawater-50% seawater respectively, the proline content and superoxide dismutase activity were obviously increased, the contents of soluble sugar and potassium ion (K<sup> </sup>), root activity and relative water content (RWC) and ratio of root/top slowly increased, but malondialdehyde (MDA) contents quickly decreased. After rewatering, K<sup> </sup> content, root activity and RWC raised apparently, and other determinants declined. During the PEG stress, MDA content and root activity showed a little decrease, and else indexes dramatically increased. Compared with freshwater treatment, the compensatory effect of rewatering after sustained 50% seawater stress was evidently debased due to severe root damage, and that of sustained 25% seawater treatment was lessened inapparently, but that of alternate 25% seawater-50% seawater irrigation was enhanced a little or markedly. This implied that seedlings were induced by the optimized seawater stress, which led to corresponsive metabolism, and the rewatering caused compensatory even "over-compensatory" metabolism and drought-resistance in the root, which also alleviated sub-stress effects on seedlings to the salinity.
Number of references:24
Main heading:Seawater effects
Controlled terms:Agriculture - Aldehydes - Amino acids - Coastal zones - Drought - Grain (agricultural product) - Irrigation - Metabolism - Oxygen - Physiology - Plants (botany) - Polyethylene glycols - Salinity measurement - Seed - Soil moisture - Sugars - Water
Uncontrolled terms:Coastal area - Compensatory characteristics - Drought stress - Maize roots - Maize seedlings - Malondialdehyde - Potassium ions - Relative water content - Rewatering - Soluble sugars - Superoxide dismutase activities - Water-saving irrigation
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 815.1.1 Organic Polymers - 804.1 Organic Compounds - 804 Chemical Products Generally - 483.1 Soils and Soil Mechanics - 471.4 Seawater, Tides and Waves - 471 Marine Science and Oceanography - 461.9 Biology - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.03.018
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 45>
Accession number:20120914812812
Title:Effects of soil and water loss control on reducing runoff and sediment transport in Yan'gou watershed of Loess Hilly region
Authors:Xu, Xuexuan (1); Liu, Puling (1); Ju, Tongjun (1); Shi, Xinhe (1); Yu, Miaozi (1)
Author affiliation:(1) Institute of Soil and Water Conservation, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Xu, X.(xuxuexuan@nwsuaf.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:113-117
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:The large-scale ecological restoration will lead to significant effects on regional eco-environment in the loess plateau. Its effect on the watershed hydrology is particularly important to understand the ecological environment changes. The objective of this study was to understand the runoff and sediment changes after soil and water conservation measures had been used in Yan'gou watershed in the loess hilly region. The data of restoration process, sediment and runoff dynamic from 1998 to 2010 were analyzed. Results indicated that the runoff-sediment in Yan'gou watershed have had a significant change after management. Although the total runoff still fluctuated with precipitation, the flood flow, sediment load and total sediment discharge decreased significantly. This tendency was consistent with the stage and methods of management in this region. Terrance and other engineering measures sharply reduced the runoff, and ecological measures not only reduced the runoff, but also led to a large amount of reduction on sediment content. Thus, we should combine engineering and ecological measures, so as to effectively control the soil erosion in loess hilly region.
Number of references:19
Main heading:Runoff
Controlled terms:Anoxic sediments - Ecology - Landforms - Risk management - Sediment transport - Sedimentology - Sediments - Soils - Water conservation - Watersheds
Uncontrolled terms:Eco-environments - Ecological environments - Ecological measures - Ecological restoration - Flood flow - Loess hilly region - Loess Plateau - Restoration process - Sediment changes - Sediment content - Sediment discharge - Sediment loads - Soil and water conservation - Soil and water loss - Soil erosion - Watershed hydrology
Classification code:922.1 Probability Theory - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 481.1 Geology - 454.3 Ecology and Ecosystems - 444.1 Surface Water - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.03.020
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 46>
Accession number:20120914812794
Title:Design and experiments on soil spreading devices of plastic cell-tray type planter for raising super hybrid rice seedlings
Authors:Ma, Ruijun (1); Ma, Xu (1); Zhang, Yali (1); Jia, Ruichang (1); Yang, Wenwu (1)
Author affiliation:(1) College of Engineering, South China Agriculture University, Guangzhou 510642, China; (2) Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Ma, X.(maxu1959@scau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:8-13
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 types of soil spreading devices were designed for the planter used in raising super hybrid rice seedlings in the plastic cell-tray, as well as the soil spreading device with the cylinder of 4-spiral-groove and the belt type of soil-spreading device were designed. Under the productivity of 450 trays/h (the corresponding speed of cell-tray is 0.075 m/s), the experiments were carried out with different soil water contents, soil granule sizes and soil spreading gaps. Results show the soil spreading gap of 3 and 1mm are appropriated for the soil spreading device with the cylinder of 4-spiral-groove while spreading soil granules after passing through 5 and 3 mm sieve pore, respectively. For the belt type of soil-spreading device, the soil spreading gaps are 6-7 and 5 mm, respectively. Both soil spreading devices quality and uniformity performed better for wet small soil granules than dry large soil granules. It is more important that the working condition can be improved while spreading wet soil granules. Soil spreading devices can meet soil spreading requirements of super hybrid rice seedlings raised in plastic cell-tray. However, the belt type of soil-spreading device show more problems in the experiments. The uniformity performance of spreading soil can be evaluated by using the variance analysis and the multiple comparisons test.
Number of references:13
Main heading:Equipment
Controlled terms:Agricultural machinery - Cells - Cylinders (shapes) - Cytology - Design - Experiments - Granulation - Seed - Soil moisture
Uncontrolled terms:Granule size - Multiple comparisons tests - Planter - Rice seedlings - Soil water content - Variance analysis - Wet soil - Working conditions
Classification code:901.3 Engineering Research - 901 Engineering Profession - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 802.3 Chemical Operations - 483.1 Soils and Soil Mechanics - 461.2 Biological Materials and Tissue Engineering - 408.2 Structural Members and Shapes - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2012.03.002
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 47>
Accession number:20120914812822
Title:Feature extraction and classification of Tilletia diseases based on image recognition
Authors:Deng, Jizhong (1); Li, Min (1); Yuan, Zhibao (2); Jin, Ji (1); Huang, Huasheng (1)
Author affiliation:(1) College of Engineering, South China Agricultural University, Guangzhou 510642, China; (2) Hainan Entry-Exit Inspection and Quarantine Bureau, Haikou 570311, China
Corresponding author:Yuan, Z.(yzhibao@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:172-176
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The identification of three types of diseases of Tilletia caries (DC.) Tul., Tilletia indica Mitra and Tilletia controversa Ku¨hn are important in the imports and exports inspection and quarantine for their harm to wheat production and human health. Three diseases were recognized and classified based on image analysis and pattern recognition techniques by using Tilletia diseases micrographs. Six typical patterns in sixteen features of shape and texture in the images of the disease infected spores were extracted. Minimum distance method, BP neural network and support vector machine (SVM) were used for the recognition and classification of 96 samples of Tilletia diseases infected spores images. The experimental results showed that the classification performance of SVM was superior to that of minimum distance method and BP neural network, the overall recognition accuracy reached up to 82.9%. Therefore, it is practicable to recognize and classify three types of Tilletia diseases by image analysis and SVM.
Number of references:18
Main heading:Support vector machines
Controlled terms:Classification (of information) - Feature extraction - Image analysis - Image recognition - Image texture - International trade - Neural networks
Uncontrolled terms:BP neural networks - Classification performance - Feature extraction and classification - Human health - Minimum distance - Pattern recognition techniques - Recognition accuracy - Support vector - Typical patterns - Wheat production
Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 902.3 Legal Aspects
DOI:10.3969/j.issn.1002-6819.2012.03.030
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 48>
Accession number:20120914812817
Title:Research on plant three-dimensional information acquisition method
Authors:Fang, Hui (1); Hu, Lingchao (1); He, Rentao (1); He, Yong (1)
Author affiliation:(1) College of Biosystem Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
Corresponding author:He, Y.(yhe@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
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:Plant three-dimensional information acquisition technology can accurately reproduce the morphology of specific plants, and can be used to study the spatial structure related properties of plants. The paper mainly studied how to obtain complete plant point cloud data by using a three-dimensional data acquisition system and rotating device, and then to obtain the three-dimensional information of plant spatial entities quickly and non-destructively. A rectification technology was proposed based on external additional structure, which partly solved the problem that the point cloud cannot be registered well. The results can provide a reference for the modeling technology of the virtual plants growth.
Number of references:16
Main heading:Three dimensional
Controlled terms:Information technology - Scanning - Technology transfer
Uncontrolled terms:Additional structures - Modeling technology - Plants - Point cloud - Point cloud data - Registration - Rotating device - Spatial entities - Spatial structure - Three-dimensional data - Three-dimensional information - Virtual plants
Classification code:741.3 Optical Devices and Systems - 902.1 Engineering Graphics - 903 Information Science - 911.2 Industrial Economics
DOI:10.3969/j.issn.1002-6819.2012.03.025
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 49>
Accession number:20120914812839
Title:Influence of packed rate and compensated water on vacuum precooling of King oyster mushroom
Authors:Liu, Bin (1); Zhu, Longhua (1); Ye, Qingyin (1); Yuan, Ruixiang (2)
Author affiliation:(1) Tianjin Key Lab. of Refrigeration Technology, Tianjin University of Commerce, Tianjin, People Republic of China, 300134, China; (2) National Engineering Technology Research Center for Preservation of Agricultural Products, Tianjin, People Republic of China, 300384, China
Corresponding author:Liu, B.(lbtjcu@tjcu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:274-277
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The compensated water in the vacuum cooling is helpful to reduce the water loss of the cooled products. The effects of packed rate and the compensated water before cooling on storage period of King oyster mushroom were investigated by experiments. The packed rate was 20%, 40% and 60% respectively. The compensated water was 0, 12 and 18 g/kg respectively. The initial temperature was 11°C and 16°C respectively. The results show that the pressure of boiling point will increase with the increasing of the packed rate, and precooling time of mushroom in the vacuum slot will prolong. The compensated water has little influence on the pressure of vacuum cooling, but has influences on water loss and precooling time of mushroom in the vacuum cooling process. After 14 days storage at 0°C, the mushrooms can keep good quality under the condition of 18 g/kg compensated water and 20% packed rate.
Number of references:22
Main heading:Cooling
Controlled terms:Energy storage - Shellfish - Temperature - Vacuum - Vacuum applications
Uncontrolled terms:Mushroom - Oyster mushroom - Packed rate - Storage periods - Vacuum cooling - Water loss - Weight loss
Classification code:461.9 Biology - 633 Vacuum Technology - 633.1 Vacuum Applications - 641.1 Thermodynamics - 641.2 Heat Transfer - 702 Electric Batteries and Fuel Cells
DOI:10.3969/j.issn.1002-6819.2012.03.047
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
<RECORD 50>
Accession number:20120914812799
Title:Analysis on production allocative efficiency of agricultural machinery based on frontier theory in China
Authors:Li, Wei (1); Xue, Caixia (2); Zhu, Ruixiang (1); Guo, Kangquan (1); Huang, Yuxiang (1); Liu, Huixia (3)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China; (2) College of Economics and Management, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China; (3) Foton Lovol International Heavy Industry Co. Ltd., Weifang 261206, China
Corresponding author:Zhu, R.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:3
Issue date:February 1, 2012
Publication year:2012
Pages:38-43
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 quantitative calculation of agricultural machinery production allocative efficiency can provide theoretical support for formulating and implementing agricultural mechanization policy. Based on the agricultural input and output data of 31 provinces in China from 1991 to 2009, machinery production allocative efficiency was measured by stochastic frontier analysis techniques and its characteristics of variation tendency and spatial distribution were analyzed. The results showed that, the value of agricultural machinery production allocative efficiency in China was average 64.65% from 1991 to 2009. The average of each region indicated that Northeast was the highest, with East China the second, Southwest, North China and mid-southern China in the middle, and Northwest the lowest. The tendency of machinery production allocative efficiency varied among those regions.
Number of references:20
Main heading:Agricultural machinery
Controlled terms:Efficiency - Measurements - Stochastic systems
Uncontrolled terms:Agricultural mechanization - Allocative efficiency - East China - Frontier theory - Input and outputs - North China - Quantitative calculation - Stochastic frontier analysis
Classification code:961 Systems Science - 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 - 913.1 Production Engineering - 821.1 Agricultural Machinery and Equipment
DOI:10.3969/j.issn.1002-6819.2012.03.007
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.
期刊信息
- 主管单位 中国科学技术协会
- 主办单位 中国农业工程学会
- 主编 朱明
- 总编/社长 王应宽
- 地址 北京朝阳区麦子店街41号
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- Bioresource Technology
- Industrial Crops and Products
- Biomass & Bioenergy
- Biosystems Engineering
- Aquacultural Engineering
- International Journal of Agricultural and Biological Engineering
- Journal of Irrigation and Drainage Engineering
- Paddy and Water Environment
- Journal of Agricultural Engineering
- Transactions of the ASABE
- Revista Brasileira de Engenharia Agricola e Ambiental
- Applied Engineering in Agriculture
- Engenharia Agricola
- AMA-Agricultural Mechanization in Asia Africa and Latin America
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