1.   Accession number:  20093612289648

Title:  Treatment of high strength molasses wastewater with anaerobic fixed-bed reactor

Authors:  Lin, Changsong1, 2 ; Yuan, Xufeng1 ; Wang, Xiaofen1 ; Feng, Zongqiang3 ; Zhu, Wanbin1 ; Cheng, Xu1 ; Cui, Zongjun1 

Author affiliation:  1  Center of Biomass Engineering, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China

2  Department of Life Science, Liupanshui Normal College, Liupanshui 553004, China

3  Agricultural College of Yanbian University, Longjing 133400, China

Corresponding author:  Zhu, W. (wanbin@cau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  195-200

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  To exploit an efficient technology to treat high strength wastewater by biogas fermentation, a laboratory-scale experiment were carried out to assess the performance of an anaerobic fixed-bed reactor (AFBR) packed with active carbon fibre as biofilm carrier for treating an acidic and high strength molasses wastewater. The continuous operation of the system was started using an initial chemical oxygen demand (COD) concentration of 5000 mg/L at a hydraulic retention time (HRT) around two days. When the reactor was fed with COD under 47000 mg/L, the relevant organic loading rate (OLR) was equivalent to 21.38 kg/(m3·d), the COD removal efficiency was above 86%, biogas and methane productivities of unit volume of 9.51 and 6.46 L/(L·d) were achieved respectively at that level. COD removal efficiency decreased respectively from 86.48% to 74.40%, 67.02% and 63.50% when OLR were increased from 21.38 to 35.13, 39.06 and 44.88 kg/(m3·d), and the relevant biogas productivities of unit volume were 13.71, 13.98 and 11.44 L/(L·d), and the methane productivities of unit volume were 8.84, 8.67 and 5.89 L/(L·d), respectively. Influent pH value of the AFBR was usually ranged between 3.5-5.6 without any pretreatment. Effluent pH value was ranged spontaneously on a feasible condition of 6.8-7.6 after methane fermentation. When the pH value was beyond the range of 6.8-7.6, the alkalinity was required to maintain the pH value at a suitable range. With the experiment progressing, a high strength influent COD of 78600 mg/L was achieved, which was equivalent to an OLR of 44.88 kg/(m3·d). The anaerobic fixed-bed reactor presented an efficient treatment of acidic and high strength organic wastewater, and a strong anti-impact load capacity. The sludge production was so low that the reactor did not wall up in the process of 165-day operation. Therefore, it can save managing and economic cost.

Number of references:  20

Main heading:  Wastewater treatment

Controlled terms:  Activated carbon treatment  -  Alkalinity  -  Biochemical oxygen demand  -  Biogas  -  Carbon fibers  -  Carbon nanofibers  -  Chemical reactors  -  Effluents  -  Fermentation  -  Impact strength   -  Methane  -  Molasses  -  Oxygen  -  pH effects  -  Productivity  -  Removal  -  Strength of materials  -  Tensile strength  -  Wastewater  -  Water recycling

Uncontrolled terms:  Active carbon  -  Active carbon fibres  -  Anaerobic fermentation  -  Anaerobic fixed-bed reactors  -  Biofilm carriers  -  Biogas fermentation  -  Chemical-oxygen demands  -  COD removal efficiency  -  Concentration of  -  Continuous operation   -  Economic costs  -  Efficient technology  -  Efficient treatment  -  Fixed-bed reactor  -  High strength  -  High strength molasses wastewater  -  High strength wastewater  -  Hydraulic retention time  -  Impact loads  -  Laboratory scale   -  Methane fermentation  -  Molasses wastewater  -  Organic loading rates  -  Organic wastewater  -  pH value  -  Pre-Treatment  -  Sludge production  -  Unit volume

Classification code:  802.1 Chemical Plants and Equipment  -  802.2 Chemical Reactions  -  802.3 Chemical Operations  -  803 Chemical Agents and Basic Industrial Chemicals  -  804 Chemical Products Generally  -  804.1 Organic Compounds  -  805.1.1 Biochemical Engineering  -  817.1 Polymer Products  -  821.5 Agricultural Wastes  -  822.3 Food Products  -  913.1 Production Engineering  -  933 Solid State Physics  -  951 Materials Science  -  801.2 Biochemistry  -  421 Strength of Building Materials; Mechanical Properties  -  422 Strength of Building Materials; Test Equipment and Methods  -  444 Water Resources  -  445.1 Water Treatment Techniques  -  452.2 Sewage Treatment  -  452.3 Industrial Wastes  -  452.4 Industrial Wastes Treatment and Disposal  -  453 Water Pollution  -  453.2 Water Pollution Control  -  461.8 Biotechnology  -  522 Gas Fuels  -  761 Nanotechnology  -  801.1 Chemistry, General

DOI:  10.3969/j.issn.1002-6819.2009.07.036

Database:  Compendex

2.   Accession number:  20093612289638

Title:  Global sensitivity analysis of growth simulation parameters of winter wheat based on EPIC model

Authors:  Wu, Jin1 ; Yu, Fushui2 ; Chen, Zhongxin2 ; Chen, Jin1 

Author affiliation:  1  Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of China, College of Resource Science and Technology, Beijing Normal University, Beijing 100875, China

2  Key Laboratory of Resources Remote Sensing and Digital Agriculture, Ministry of Agriculture, Beijing 100081, China

Corresponding author:  Chen, J. (chenjin@ires.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  136-142

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  Sensitivity analysis of model parameters is a very important step in the process of model localization and regionalization. Local sensitivity analysis neglected the indirect effect of interactions among parameters on the model results, which resulted in the one-sidedness of choosing sensitive parameters. Sensitive parameters of winter wheat yield simulation in EPIC model were analyzed by global sensitivity analysis in Hengshui experimental area. The results showed that normal harvest index (HI), point in the growing season when leaf area begins to decline due to leaf senescence (DLAI), potential heat units (PHU) and maximum crop height (HMX), with a total sensitivity index exceeding 0.1, were the key parameters which effected the model localization. And planting date, harvesting date, and planting population, with a total sensitivity index above 0.1, were the most sensitive parameters which effected the yield estimation of winter wheat at regional scale. The study suggests that global sensitive analysis is more effective for model localization and regionalization than the local sensitivity analysis.

Number of references:  31

Main heading:  Sensitivity analysis

Controlled terms:  Crops  -  Forestry  -  Harvesting  -  Plants (botany)  -  Simulators

Uncontrolled terms:  Crop height  -  EPIC model  -  Global sensitivity analysis  -  Growing season  -  Growth  -  Growth simulation  -  Harvest index  -  Harvesting dates  -  Heat units  -  Indirect effects   -  Key parameters  -  Leaf area  -  Leaf senescence  -  Local sensitivity analysis  -  Model parameters  -  Model results  -  Planting date  -  Regional scale  -  Regionalization  -  Sensitive analysis   -  Sensitive parameter  -  Sensitivity indices  -  Winter wheat  -  Yield estimation

Classification code:  821.4 Agricultural Products  -  821.3 Agricultural Methods  -  821.0 Woodlands and Forestry  -  731.1 Control Systems  -  671 Naval Architecture  -  921 Mathematics  -  662.1 Automobiles  -  655.2 Satellites  -  654.1 Rockets and Missiles  -  621 Nuclear Reactors  -  461.9 Biology  -  657.1 Solar Energy and Phenomena

DOI:  10.3969/j.issn.1002-6819.2009.07.025

Database:  Compendex

3.   Accession number:  20093612289639

Title:  Development of wireless sensor networks in precision irrigation system for crop

Authors:  Xiong, Shuming1 ; Wang, Liangmin1, 2 ; Wang, Xinsheng1 ; Zhan, Yongzhao1 

Author affiliation:  1  School of Computer Science and Telecommunication Engineering, Jiangsu University, Zhenjiang 212013, China

2  School of Computer Science and Engineering, Southeast University, Nanjing 210018, China

Corresponding author:  Xiong, S. (xsm@ujs.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  143-147

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:  In order to accurately provide the extent of water deficit and thus to offer a scientific reference for the precision irrigation, we explored the application of wireless sensor networks to precision irrigation system based on the acoustic emission principle for crop water stress. Adaptive weighted data fusion algorithm was adopted to improve the precision of acoustic emission signal and cluster-based multi-hop routing algorithm was proposed to reduce energy consumption of node transmitting data. By a NB100 gateway, the system realized bridging between wireless network and wired network. It runs distributed and possesses many advantages, such as good robustness, extensibility and scalability. Simulation experiments showed that networking was correct and the energy consumption of wireless transmission was above 60 percent in total energy. The system enables user to precisely acquire the crop water requirement information and thus to implement the precision irrigation remotely, and can be effectively applied to some water-saving agriculture fields, for example, the cropland, the nursery garden, the greenhouse, etc.

Number of references:  14

Main heading:  Wireless sensor networks

Controlled terms:  Acoustic emissions  -  Acoustics  -  Adaptive algorithms  -  Crops  -  Electric load forecasting  -  Gateways (computer networks)  -  Information fusion  -  Internet  -  Irrigation  -  Network protocols   -  Plants (botany)  -  Routing algorithms  -  Sensor data fusion  -  Sensor networks  -  Telephone systems  -  Water conservation  -  Wireless telecommunication systems

Uncontrolled terms:  Acoustic emission signal  -  Cluster-based  -  Crop water requirements  -  Energy consumption  -  Multi-hop routing  -  Precision irrigation  -  Simulation experiments  -  Total energy  -  Transmitting data  -  Water deficits   -  Water stress  -  Weighted data  -  Wired networks  -  Wireless transmissions

Classification code:  921 Mathematics  -  723 Computer Software, Data Handling and Applications  -  723.2 Data Processing and Image Processing  -  731.1 Control Systems  -  732 Control Devices  -  732.2 Control Instrumentation  -  751 Acoustics, Noise. Sound  -  751.2 Acoustic Properties of Materials  -  821.3 Agricultural Methods  -  821.4 Agricultural Products  -  903.1 Information Sources and Analysis  -  722.4 Digital Computers and Systems  -  403.1 Urban Planning and Development  -  444 Water Resources  -  461.9 Biology  -  706.1 Electric Power Systems  -  722.3 Data Communication, Equipment and Techniques  -  716 Telecommunication; Radar, Radio and Television  -  717 Optical Communication  -  718 Telephone Systems and Related Technologies; Line Communications  -  718.1 Telephone Systems and Equipment  -  716.3 Radio Systems and Equipment

DOI:  10.3969/j.issn.1002-6819.2009.07.026

Database:  Compendex

4.   Accession number:  20093612289662

Title:  Optimization of energy saving technology for drying dehydrated garlic slices

Authors:  Zhang, Jingjing1 ; Cao, Peng1, 2 ; Qiao, Xuguang1 

Author affiliation:  1  College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China

2  Yantai Entry-Exit Inspection and Quarantine Bureau, Yantai 264000, China

Corresponding author:  Qiao, X. (xgqiao@sdau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  279-282

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:  This study was carried out to investigate the energy saving technique of dehydrated garlic slices in heated-air circulate drying. The dehydration process of garlic slices was optimized by three factors quadratic orthogonal rotary design, and the quadratic regression equations were established and the predicted minimum energy consumption was 1.96 kWh/kg. The optimum technique parameters of air temperature, sample slice thickness and loading density were 62.3°C, 2.38 mm and 2.69 kg/m2, respectively. The verification test was carried out at air temperature of 62°C, sample slice thickness of 2.4 mm, loading density of 2.7 kg/m2, the energy consumption was 2.05 kWh/kg, and the yield was 4.11 kg/h. Compared with the technique at present, the optimum technique can reduce by 27% of the energy consumption.

Number of references:  17

Main heading:  Dewatering

Controlled terms:  Atmospheric temperature  -  Curing  -  Dehydration  -  Energy conservation  -  Hot air heating  -  Optimization

Uncontrolled terms:  Air temperature  -  Dehydrated garlic slice  -  Dehydration process  -  Drying technology  -  Energy consumption  -  Energy-saving techniques  -  Energy-saving technologies  -  Garlic slices  -  Heated air circulate drying  -  Loading density   -  Minimum energy  -  Optimum technique  -  Quadratic regression  -  Rotary design  -  Slice thickness  -  Verification tests

Classification code:  818.3 Rubber and Elastomer Processing  -  815.1 Polymeric Materials  -  802.3 Chemical Operations  -  921.5 Optimization Techniques  -  802.2 Chemical Reactions  -  525.2 Energy Conservation  -  443.1 Atmospheric Properties  -  643.1 Space Heating

DOI:  10.3969/j.issn.1002-6819.2009.07.050

Database:  Compendex

5.   Accession number:  20093612289614

Title:  Finite element analysis of the concrete lining channel frost heaving based on the changing temperature of the whole day

Authors:  Wang, Zhengzhong1, 2 ; Lu, Qin1 ; Guo, Lixia3 ; Yang, Chengyou4 ; Yang, Fuyuan4 

Author affiliation:  1  Research Center of Engineering Safety and Disease Prevention, Northwest Agriculture and Forestry University, Yangling 712100, China

2  State Key Laboratory of Frozen Soil Engineering, Chinese Acad. of Sci., Lanzhou 730000, China

3  College of Water Conservancy and Hydroelectric Engineering, Hohai University, Nanjing 210098, China

4  Shule River Basin Water Resources Administration of Gansu Province, Yumen 735211, China

Corresponding author:  Wang, Z. (wangzz0910@yahoo.com.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

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 find out the developing regularity of frost heaving pressure and frost heaving deformation of concrete lining changed with temperature in the daytime and at night, basing on the mechanics and the theory of physics of the frozen soil, using ANSYS to do numerical simulation of the frost heaving process of the concrete lining, loading the temperature by the transient temperature change mode, this paper researches the temperature field and frost heaving distortion and changing rule of the normal frost heaving pressure and the tangential frost heaving pressure with the time. The results showed that the causes of the frozen and thawing destruction of the canal included not only the frost heaving of basic soil of the canal, but also the uneven, asymmetric, asynchrony changes of temperature, frost heaving deformation and frost heaving pressure at the two slopes of the canal. Soil of shady slope was frozen about 15 days earlier than that of sunny slope, the maximum frost heaving pressure and frost heaving amount appeared about 4 days later than the daily average lowest temperature, the maximum frost heaving pressure and frost heaving amount in one day appeared no more than 1 hour later than the daily lowest temperature. The results agree well with those of local test, but were bigger than those of the firm form numerical simulation, which indicates that using transient numerical simulation to design the canal preventing frost heaving is correct and rational.

Number of references:  21

Main heading:  Finite element method

Controlled terms:  Canal linings  -  Computer simulation  -  Computer simulation languages  -  Concretes  -  Deformation  -  Freezing  -  Frozen soils  -  Hydraulic structures  -  Thawing  -  Thermal effects

Uncontrolled terms:  Asynchrony  -  Changing temperature  -  Concrete linings  -  Finite element analysis  -  Freezing and thawing  -  Frost heaving  -  Local tests  -  Numerical simulation  -  Paper research  -  Temperature field   -  Transient numerical simulation  -  Transient temperature

Classification code:  611 Hydroelectric and Tidal Power Plants  -  619.1 Pipe, Piping and Pipelines  -  641 Heat and Mass Transfer; Thermodynamics  -  644.1 Refrigeration Methods  -  951 Materials Science  -  723.1.1 Computer Programming Languages  -  802.3 Chemical Operations  -  822.2 Food Processing Operations  -  921.6 Numerical Methods  -  723.5 Computer Applications  -  531 Metallurgy and Metallography  -  483.1 Soils and Soil Mechanics  -  405 Construction Equipment and Methods; Surveying  -  407.2 Waterways  -  412 Concrete  -  421 Strength of Building Materials; Mechanical Properties  -  422 Strength of Building Materials; Test Equipment and Methods  -  434 Waterway Transportation  -  441 Dams and Reservoirs; Hydro Development  -  446.2 Related Hydraulic Structures

DOI:  10.3969/j.issn.1002-6819.2009.07.001

Database:  Compendex

6.   Accession number:  20093612289632

Title:  Experiment on the motion characteristics of rice seeds after collision with different slopes

Authors:  Ren, Wentao1 ; Dong, Bin1 ; Cui, Hongguang1 ; Han, Shuang1 ; Xiang, Quanli1 ; Dai, Lili1 

Author affiliation:  1  College of Engineering, Shenyang Agricultural University, Shenyang 110161, China

 Corresponding author:  Ren, W. (renwentao1958@yahoo.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  103-107

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  Trajectory of the rice seed motion after collision with inclined plane was tracked by a HSVC(high speed video camera) and a high-resolution camera separately from vertical and horizontal direction. Through image analysis captured from video, effects of contact materials, seed charge height and inclined plane obliquity on all motion parameters of the collision were detected and analyzed. The results showed that as seed charge height increased, the maximum height of the first bounce H1 and the displacement along the direction of the slope L1 increased linearly. With the increase of inclined plane obliquity, H1 reduced linearly and L1 increased exponentially. Using quadratic orthogonal test with two factors, the seed motion forecast model was established with seed charge height and inclined plane obliquity as independent variables and lateral deviation angle of seed motion plane as objective function. The research results provide reference for structure design of seed drop tube.

Number of references:  24

Main heading:  Seed

Controlled terms:  Cameras  -  Coal combustion  -  Drops  -  Image analysis  -  Machinery  -  Structural design  -  Video cameras

Uncontrolled terms:  Collision  -  Contact material  -  Different slopes  -  Drop tubes  -  FORECAST model  -  High resolution camera  -  High speed video cameras  -  Inclined plane obliquity  -  Inclined planes  -  Independent variables   -  Lateral deviation  -  Motion characteristics  -  Motion parameters  -  Motion plane  -  Objective functions  -  Orthogonal test  -  Research results  -  Rice seed  -  Structure design

Classification code:  931.2 Physical Properties of Gases, Liquids and Solids  -  931.1 Mechanics  -  821.4 Agricultural Products  -  742.2 Photographic Equipment  -  741 Light, Optics and Optical Devices  -  723.2 Data Processing and Image Processing  -  716.4 Television Systems and Equipment  -  601 Mechanical Design  -  524 Solid Fuels  -  521 Fuel Combustion and Flame Research  -  443.2 Meteorological Instrumentation  -  443.1 Atmospheric Properties  -  408.1 Structural Design, General

DOI:  10.3969/j.issn.1002-6819.2009.07.019

Database:  Compendex

7.   Accession number:  20093612289651

Title:  Analysis and simulation prediction on LUCC of Xining city based on RS and GIS

Authors:  Fu, Yang1 ; Xiao, Jianshe1 ; Xiao, Ruixiang1 ; Sa, Wenjun2 ; Li, Xilai3 

Author affiliation:  1  Qinghai Meteorological Science Institute, Xining 810001, China

2  Foreign Affairs Office, Agricultural and Animal Husbandry Bureau of Qinghai, Xining 810008, China

3  School of Agriculture and Animal Science, Qinghai University, Xining 810003, China

Corresponding author:  Xiao, J. (xiaojianshe@126.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  211-218

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:  Xining city is located in the east of the Qinghai-Tibetan Plateau. With the development of human activities, studying spatial transformation regulation of land use and land cover change (LUCC) in this region is important to reveal the driving mechanism of the regional changes caused by environmental improvement campaign. These changes included land use patterns of animal husbandry in urban and rural areas, eco-environmental effects, socioeconomic situation, etc. GIS and the related models were applied to interpret precisely Landsat-TM remote sensing image of Xining city in 1999 and 2005, and quantitative statistic and phasor diagram on land use/cover had been worked out. Dynamic characteristics of LUCC were analyzed, and Markov transition matrix of various land use types was calculated by using map algebra as well. The results showed that cropland, grassland and uncultivated land were main types of LUCC in Xining city from 1999 to 2005. Variation of land use pattern had taken place promptly in 73.58% of the study area. Wetlands area such as rivers, lakes, etc. grassland area and woodlands area increased significantly during six years, indicating strong positive consequence of environmental improvement campaign in Xining since 2000. Results of simulation and prediction showed that under conditions of constant external impacts, cropland area in Xining city would continue to decrease, and construction land area such as buildings, roads, etc. will increase in the coming ten years. Increase of woodlands, grassland, rivers, lakes as well as wetland is certainly favorable to ecological environment.

Number of references:  21

Main heading:  Land use

Controlled terms:  Ecology  -  Economics  -  Environmental regulations  -  Forestry  -  Geographic information systems  -  Image reconstruction  -  Lakes  -  Markov processes  -  Rapid solidification  -  Remote sensing   -  Rural areas  -  Wetlands

Uncontrolled terms:  Ecological improvement  -  Evaluation of effect  -  GIS  -  Land use/cover change(LUCC)  -  RS  -  Simulation and prediction  -  Xining city

Classification code:  723.3 Database Systems  -  731.1 Control Systems  -  741 Light, Optics and Optical Devices  -  802.3 Chemical Operations  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  971 Social Sciences  -  821.0 Woodlands and Forestry  -  903.3 Information Retrieval and Use  -  911.2 Industrial Economics  -  922.1 Probability Theory  -  933 Solid State Physics  -  901.4 Impact of Technology on Society  -  723.2 Data Processing and Image Processing  -  537.1 Heat Treatment Processes  -  403 Urban and Regional Planning and Development  -  403.2 Regional Planning and Development  -  407 Maritime and Port Structures; Rivers and Other Waterways  -  442.2 Land Reclamation  -  444.1 Surface Water  -  454.2 Environmental Impact and Protection  -  454.3 Ecology and Ecosystems  -  481.1 Geology  -  483.1 Soils and Soil Mechanics  -  531 Metallurgy and Metallography

DOI:  10.3969/j.issn.1002-6819.2009.07.039

Database:  Compendex

8.   Accession number:  20093612289647

Title:  Hydrolysis effect of dilute acid on corn stalks by continuous screw extrusion steam explosion

Authors:  Huang, Qiuting1 ; Zhang, Peng1 ; Zhang, Shurong1 ; Li, Guo1 

Author affiliation:  1  College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China

Corresponding author:  Zhang, P. (zhangpeng@mail.buct.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  190-194

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  The corn stalks were pretreated by continuous screw extrusion steam explosion. The effects of the concentration of acid, reaction time, reaction temperature and the ratio of feedstuff to dilute acid on the conversion of the pretreated corn stalks to reducing sugars were investigated. In the orthogonal experiment of sulfuric acid hydrolysis, the effect order of five factors arranged from large to small was the type of raw materials, the ratio of feedstuff to dilute acid, hydrolysis temperature, concentration of H2SO4, and reaction time. The materials exploded at 120°C for 10 min had the highest reducing sugar yield at the optimal conditions of 3% sulfuric acid concentration, hydrolysis temperature 110°C, hydrolysis time 60 min, and ratio of feedstuff to dilute acid of 1:20, and the yield of reducing sugars was 39.7%. In the orthogonal experiment of hydrochloric acid hydrolysis, the effect order of five factors was hydrolysis temperature, the type of raw materials, hydrolysis time, concentration of acid and the ratio of feedstuff to dilute acid. The optimal conditions were 3% HCl, hydrolysis temperature 110°C, hydrolysis time 60 min, ratio of feedstuff to dilute acid of 1:20 and the material explosion at 120°C for six minutes, and the yield of reducing sugars was 42.0%.

Number of references:  15

Main heading:  Saccharification

Controlled terms:  Acids  -  Concentration (process)  -  Explosions  -  Explosives  -  Extrusion  -  Hydrochloric acid  -  Steam  -  Sugar (sucrose)  -  Sugars  -  Sulfur determination   -  Sulfuric acid

Uncontrolled terms:  Concentration of  -  Continuous screw extrusion steam explosions  -  Corn stalk  -  Corn straw  -  Dilute acid  -  Dilute acids  -  Optimal conditions  -  Orthogonal experiment  -  Reaction temperature  -  Reaction time   -  Reducing sugars  -  Screw extrusion  -  Steam explosion

Classification code:  802.3 Chemical Operations  -  803 Chemical Agents and Basic Industrial Chemicals  -  804 Chemical Products Generally  -  804.1 Organic Compounds  -  802.2 Chemical Reactions  -  804.2 Inorganic Compounds  -  816.1 Processing of Plastics and Other Polymers  -  822.3 Food Products  -  914.1 Accidents and Accident Prevention  -  811.3 Cellulose, Lignin and Derivatives  -  801.2 Biochemistry  -  405.2 Construction Methods  -  502.1 Mine and Quarry Operations  -  502.2 Mine and Quarry Equipment  -  535.2.2 Metal Forming Practice  -  404.1 Military Engineering  -  614 Steam Power Plants  -  617.3 Steam Engines  -  641.1 Thermodynamics  -  801 Chemistry  -  617.2 Steam Turbines

DOI:  10.3969/j.issn.1002-6819.2009.07.035

Database:  Compendex

9.   Accession number:  20093612289630

Title:  Dynamic simulation of assembled axial flow threshing and separating device

Authors:  Yi, Shujuan1 ; Tao, Guixiang1 ; Mao, Xin1 

Author affiliation:  1  College of Engineering, Heilongjiang August First Land Reclamation University, Daqing 163319, China

Corresponding author:  Yi, S. (yishujiuan_2005@126.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  94-97

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  In order to discuss threshing mechanism of axial threshing space further from the view of mechanics, the authors explored a dynamical model of axial flow threshing device with plunk-tooth and helical vanes assembled. Based on the principle of dynamics, mechanical condition of threshing grain was analyzed, and the force that loaded on the grain was simulated in the course of threshing. Results show that the force is uneven along the edge of helical vanes. When grain moves to the area with the range from five to nine meters near to feeding entrance along helical vanes, the acceleration reaches the maximum areas during the threshing period. The force on the grain between the concave board, cover board and cylinder is evidently higher than that on the grain in other space, which indicates that the parameaters of cover board, concave board are main factors of axcial flow threshing.

Number of references:  12

Main heading:  Flow simulation

Controlled terms:  Agriculture  -  Axial flow  -  Computer simulation languages  -  Dynamic models  -  Simulators  -  Vibrations (mechanical)

Uncontrolled terms:  Assembled axial flow device  -  Cover board  -  Dynamic simulation  -  Dynamical model  -  Grain  -  Simulation

Classification code:  921 Mathematics  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  723.5 Computer Applications  -  723.1.1 Computer Programming Languages  -  671 Naval Architecture  -  931.1 Mechanics  -  662.1 Automobiles  -  655.2 Satellites  -  654.1 Rockets and Missiles  -  631.1 Fluid Flow, General  -  621 Nuclear Reactors  -  657.1 Solar Energy and Phenomena

DOI:  10.3969/j.issn.1002-6819.2009.07.017

Database:  Compendex

10.   Accession number:  20093612289634

Title:  Winter wheat yield estimation based on support vector machine regression and multi-temporal remote sensing data

Authors:  Li, Rui1, 2 ; Li, Cunjun1 ; Xu, Xingang1 ; Wang, Jihua1 ; Yang, Xiaodong1 ; Huang, Wenjiang1 ; Pan, Yuchun1 

Author affiliation:  1  National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China

2  Information Engineering Institute, Capital Normal University, Beijing 100048, China

Corresponding author:  Li, C. (licj@nercita.org.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  114-117

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:  Developing and establishing high accurate models for crop yield estimation using remote sensing is of great significance in decision making for national food import/export and food security. A machine learning methodology called support vector machine regression (SVR) was introduced to construct remote sensing estimation model. Firstly, NDVIs from multi-temporal Landsat TM for main growing stage of winter wheat in 2004 and 2007 in Beijing suburb were used to construct yield estimation model by remote sensing through SVR. Secondly, cross validation was made on the model's stability and forecasting ability, and then the performance of SVR methodology was compared with traditional multivariate linear regression (MLR) methodology. The results showed that yield estimation model by remote sensing based on SVR could increase the precision of yield prediction. The determination coefficients were increased by 0.2162 and 0.2158, respectively, while the root mean squared errors were decreased by 0.1682 and 0.2912 in 2004 and 2007 compared with the multivariate regression methodology. Therefore, it is feasible and effective to estimate winter wheat yield by constructing estimation model based on SVR and multi-temporal remote sensing data, which provides the method to estimate the winter wheat yield via multi-temporal remote sensing data.

Number of references:  18

Main heading:  Remote sensing

Controlled terms:  Agriculture  -  Estimation  -  Image retrieval  -  Multilayer neural networks  -  Regression analysis  -  Support vector machines  -  Vectors

Uncontrolled terms:  Crop yield  -  Cross validation  -  Determination coefficients  -  Estimation models  -  Food security  -  Forecasting ability  -  LANDSAT TM  -  Machine-learning  -  Multi-temporal  -  Multi-temporal remote sensing   -  Multivariate linear regressions  -  Multivariate regression  -  National Foods  -  NDVI  -  Root mean squared errors  -  Support vector machine regression  -  Support vector machine regressions  -  Winter wheat  -  Yield estimation  -  Yield prediction

Classification code:  921.1 Algebra  -  921 Mathematics  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  741 Light, Optics and Optical Devices  -  922.2 Mathematical Statistics  -  731.1 Control Systems  -  723.2 Data Processing and Image Processing  -  723 Computer Software, Data Handling and Applications  -  461.1 Biomedical Engineering  -  723.4 Artificial Intelligence

DOI:  10.3969/j.issn.1002-6819.2009.07.021

Database:  Compendex

11.   Accession number:  20093612289666

Title:  Optimization of technology for improving water resistance of starch-based wood adhesive

Authors:  Li, Lixia1 ; Jia, Fuguo1 ; Sun, Peiling1 ; Zhao, Lijun1 

Author affiliation:  1  College of Engineering, Northeast Agricultural University, Harbin 150030, China

Corresponding author:  Jia, F. (jfg204@163.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  299-303

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 poor water resistance of the starch-based adhesive after bonding wood materials, the impact of various factors on the wet strength was researched in the course of synthesizing adhesive with corn starch, polyvinyl alcohol, isocyanate and carboxylic styrene butadiene latex. The method of quadratic orthogonal rotation combination experiment design was applied, and SAS software and Matlab software were used to process data. Effects of the material and reaction temperature on wet strength of adhesive after bonding wood materials were analyzed to optimize technological parameters of starch-based adhesive The optimal conditions were as follows: starch content 13%, polyvinyl alcohol 4%, isocyanate content 5%, latex content 3%; reation temperature 58°C. The microstructure of starch-based adhesive was analyzed by scanning electron microscope to reveal the mechanism of the wet strength enhancement.

Number of references:  15

Main heading:  Starch

Controlled terms:  Butadiene  -  Computer software  -  Impact resistance  -  Impact strength  -  Latexes  -  MATLAB  -  Optimization  -  Scanning electron microscopy  -  Styrene

Uncontrolled terms:  Corn starch  -  Experiment design  -  Latex content  -  Matlab- software  -  Optimal conditions  -  Process data  -  Quadratic orthogonal rotation  -  Reaction temperature  -  Scanning Electron Microscope  -  Starch contents   -  Starch-based  -  Starch-based adhesives  -  Styrene butadienes  -  Technological parameters  -  Water-resistances  -  Wet strength  -  Wood adhesives  -  Wood materials

Classification code:  815.1.1 Organic Polymers  -  817 Plastics and Other Polymers: Products and Applications  -  818 Rubber and Elastomers  -  931.2 Physical Properties of Gases, Liquids and Solids  -  818.2 Elastomers  -  921 Mathematics  -  921.5 Optimization Techniques  -  822.3 Food Products  -  804.1 Organic Compounds  -  801.3 Colloid Chemistry  -  408.1 Structural Design, General  -  421 Strength of Building Materials; Mechanical Properties  -  723 Computer Software, Data Handling and Applications  -  723.1.1 Computer Programming Languages  -  723.5 Computer Applications  -  741.1 Light/Optics

DOI:  10.3969/j.issn.1002-6819.2009.07.054

Database:  Compendex

12.   Accession number:  20093612289641

Title:  Quantitative identification of pernicious gases NH3 and H2S in piggery using electronic nose

Authors:  Yu, Shouhua1 ; Dong, Shaoxian1 ; Ou, Jingying2 

Author affiliation:  1  College of Informatics, South China Agricultural University, Guangzhou 510642, China

2  College of Public Management, South China Agricultural University, Guangzhou 510642, China

Corresponding author:  Yu, S. (segrad@scau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  153-157

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 establish an accurate and rapid method for determination of the main pernicious gases NH3 and H2S in the piggery in South China, an electronic nose system was built. Gas samples were prepared with static volumetric method, and the fast independent component analysis (FICA) and the radial basis function neural networks (RBFNN) were applied to identify H2S gas alone and the mixed gas of H2S and NH3 between the range of 6.95-69.53 mg/m3. The average identification accuracy of single gas reached 99.1%, while the average identification accuracy of mixed gas was 90.97%. The results show that good effect was obtained by applying FICA and RBFNN methods to quantitative identification of gases NH3 and H2S in piggery based on electronic nose system.

Number of references:  15

Main heading:  Radial basis function networks

Controlled terms:  Artificial organs  -  Attitude control  -  Gases  -  Independent component analysis  -  Neural networks  -  Optical filters  -  Sensor networks  -  Sensors  -  Sensory aids

Uncontrolled terms:  Electronic nose  -  Fast independent component analysis  -  Gas identification  -  Piggery  -  Radial basis function neural networks

Classification code:  723.4 Artificial Intelligence  -  731.1 Control Systems  -  731.3 Specific Variables Control  -  931.2 Physical Properties of Gases, Liquids and Solids  -  732 Control Devices  -  741.3 Optical Devices and Systems  -  801 Chemistry  -  732.2 Control Instrumentation  -  717.2 Optical Communication Equipment  -  656.1 Space Flight  -  461.1 Biomedical Engineering  -  461.5 Rehabilitation Engineering and Assistive Technology  -  462.1 Biomedical Equipment, General  -  462.4 Prosthetics  -  652.3 Aircraft Instruments and Equipment  -  654.1 Rockets and Missiles

DOI:  10.3969/j.issn.1002-6819.2009.07.028

Database:  Compendex

13.   Accession number:  20093612289643

Title:  Active solar heating system with soil heat storage for plastic film greenhouse and its effects

Authors:  Dai, Qiaoli1 ; Zuo, Ran1 ; Li, Ping1 ; Zhang, Zhiqiang1 ; Su, Wenjia1 ; Yu, Haiqun1 

Author affiliation:  1  School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China

Corresponding author:  Zuo, R. (rzuo@ujs.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  164-168

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  An active solar heating system with soil heat storage for plastic film greenhouses was studied. In the system, outside air was heated by solar air collector and then pumped into underground pipes. The heat carried by air was transferred through pipes to the soil and stored for use at night. In the night, heat rised slowly to the ground surface to maintain the soil at constant temperature. After continual running of the active solar heating system for four days, it showed that during the night, the average air temperature of the active solar plastic film greenhouse was 3.8°C higher and the average soil temperature was 2.3°C higher than those of the unheated one. The system could store a heat quantity of 228.9-319.1 MJ. The experimental results prove that using solar air heating system with soil heat storage can increase the air and soil temperatures for plastic film greenhouse effectively and has a good prospect for applications.

Number of references:  17

Main heading:  Heating

Controlled terms:  Carbon dioxide  -  Greenhouses  -  Heat storage  -  Heating equipment  -  Pipe  -  Plastic films  -  Protective coatings  -  Soils  -  Solar collectors  -  Solar heating   -  Temperature

Uncontrolled terms:  Average air temperature  -  Constant temperature  -  Ground surfaces  -  Heat quantity  -  Soil heat storage  -  Soil temperature  -  Solar air collector  -  Solar air heating system  -  Solar heating system  -  Underground pipes

Classification code:  643.1 Space Heating  -  643.2 Space Heating Equipment and Components  -  644.2 Refrigerants  -  657.1 Solar Energy and Phenomena  -  702.3 Solar Cells  -  804.2 Inorganic Compounds  -  813.2 Coating Materials  -  817.1 Polymer Products  -  821.6 Farm Buildings and Other Structures  -  642.2 Industrial Furnaces and Components  -  402.1 Industrial and Agricultural Buildings  -  483.1 Soils and Soil Mechanics  -  525.7 Energy Storage  -  539.2.2 Protecting Materials  -  615.2 Solar Power  -  619.1 Pipe, Piping and Pipelines  -  641.1 Thermodynamics  -  641.2 Heat Transfer  -  642.1 Process Heating

DOI:  10.3969/j.issn.1002-6819.2009.07.030

Database:  Compendex

14.   Accession number:  20093612289667

Title:  Effects of different bagging treatments on main quality indices and storability of banana fruit

Authors:  Zhu, Shijiang1 ; Ma, Liyan1 ; Liu, Shaoqun2 

Author affiliation:  1  Guangdong Province Key Lab. of Postharvest Physiology and Technology of Fruits and Vegetables, College of Horticulture, South China Agricultural University, Guangzhou 510642, China

2  Management Section of Teaching and Scientific Research Bases, South China Agricultural University, Guangzhou 510642, China

Corresponding author:  Zhu, S. (sjzhu@scau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  304-307

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  In order to understand the influences of different bagging materials and different combinations of the materials that are commonly used by fruit growers on postharvest performance, effects of 11 different bagging treatments on dry matter percentage, total soluble solids contents, Vitamin C contents, weight loss rate and shelf life of bananas were investigated. Different layers of bagging had different effects on dry matter percentage, with the single-layered baggings resulting in the highest dry matter percentage, the next being the non-bagging control, and double-layered baggings being the lowest. Also, the postharvest weight-loss of bananas differed with different layers of baggings, with the control being the highest, then the single-layered baggings, and the double-layered being the lowest. Different bagging treatments resulted in different banana shelf-life, which was six days for black plastic film bags, five days for six treatments, such as blue plastic film bag, brown paper bag, PP woven bag plus newspaper lining, PP woven bags plus polyester ball padding lining, black plastic film bag plus polyester ball padding lining and blue plastic film bag plus newspaper lining, and four days for the non-bagging control, PP woven bags, black plastic film bag plus newspaper lining and blue plastic film bag plus polyester ball padding lining. All the bagging treatments decreased soluble solids contents and increased Vitamin C contents. In conclusion, most baggings improved the storability: they reduced water loss, especially the double-layered. Most bagging treatments extended shelf-life. Baggings showed different effects on different quality indices, they increased vitamin C content, but decreased total soluble solids. Single-layered baggings tended to elevate dry matter percentage, but double-layered baggings tended to lower it. The results indicate that in terms of the effects on fruit quality and storability, the black plastic film and and the brown paper could be among the best, and the most commonly used blue plastic film might be the worst.

Number of references:  17

Main heading:  Quality control

Controlled terms:  Curing  -  Fruits  -  Linings  -  Newsprint  -  Paper containers  -  Plastic films  -  Protective coatings  -  Pumping plants  -  Quality assurance  -  Quality function deployment   -  Total quality management  -  Weaving

Uncontrolled terms:  Bagging  -  Banana  -  Dry matter  -  Storability  -  Storage

Classification code:  817.1 Polymer Products  -  818.3 Rubber and Elastomer Processing  -  819.5 Textile Products and Processing  -  951 Materials Science  -  821.4 Agricultural Products  -  913.3 Quality Assurance and Control  -  922.2 Mathematical Statistics  -  912.2 Management  -  815.1 Polymeric Materials  -  813.2 Coating Materials  -  402.1 Industrial and Agricultural Buildings  -  446 Waterworks  -  539.2.2 Protecting Materials  -  694.2 Packaging Materials  -  802.2 Chemical Reactions  -  811.1 Pulp and Paper

DOI:  10.3969/j.issn.1002-6819.2009.07.055

Database:  Compendex

15.   Accession number:  20093612289628

Title:  Yield formation characteristics of precision hill-drop drilling early rice

Authors:  Tang, Xiangru1 ; Luo, Xiwen2, 3 ; Li, Guoxi1 ; Wang, Zaiman2, 3 ; Zheng, Tianxiang1 ; Chen, Weitong2, 3 ; Shu, Shifu1 

Author affiliation:  1  College of Agriculture, South China Agricultural University, Guangzhou 510642, China

2  College of Engineering, South China Agricultural University, Guangzhou 510642, China

3  Key Laboratory of Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China

Corresponding author:  Tang, X. (tangxr@scau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  84-87

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  Yield formation characteristics of the early rice planted with precision hill-drop drilling machine were studied by comparing the yields of two-density precision hill-drop drilling with manual broadcasting, manual seedling broadcasting and mechanized transplanting. The results showed that compared with manual broadcasting and mechanized transplanting, the yields of precision hill-drop drilling with two densities increased significantly by 24%-28% and 8.2%-11.6%, respectively, and increased slightly compared with manual seedling broadcasting. The effective panicle number increased by 0.9%-7.0%, 3.5%-9.7%, 7.4%-13.9%, and the harvest index increased by 22.7%-37.2%, 17.2%-26.6%, 0.8%-12.7% respectively, compared with manual broadcasting, manual seeding broadcasting and mechanized transplanting. The seed setting rate increased 8.6-8.73 percentage point compared with manual broadcasting. The panicle weight per hill increased 17.84-18.76 g, 2.15-3.07 g, respectively. The panicle weight per hectare increased 1.225-1.430 t, 0.447-0.628 t, respectively, compared with manual broadcasting and mechanized transplanting.

Number of references:  13

Main heading:  Broadcasting

Controlled terms:  Agricultural machinery  -  Drilling  -  Drops  -  Harvesting

Uncontrolled terms:  Drilling machines  -  Early rice  -  Formation characteristics  -  Harvest index  -  Panicle number  -  Percentage points  -  Precision hill-drop drilling  -  Seed-setting  -  Yield

Classification code:  931.2 Physical Properties of Gases, Liquids and Solids  -  931.1 Mechanics  -  821.3 Agricultural Methods  -  821.1 Agricultural Machinery and Equipment  -  716.4 Television Systems and Equipment  -  716.3 Radio Systems and Equipment  -  604.2 Machining Operations  -  443.2 Meteorological Instrumentation  -  443.1 Atmospheric Properties

DOI:  10.3969/j.issn.1002-6819.2009.07.015

Database:  Compendex

16.   Accession number:  20093612289623

Title:  Improved fuzzy-optimized multi-level evaluation for comprehensive benefit of water resources in irrigation area

Authors:  Feng, Feng1, 2 ; Xu, Shiguo1 

Author affiliation:  1  Institute of Water Environment, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China

2  Department of Water Resources Engineering, Yellow River Conservancy Technical Institute, Kaifeng 475003, China

Corresponding author:  Feng, F. (fengfeng_624@163.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  56-61

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 fuzzy-optimized, multi-objective and multilevel comprehensive evaluation model for the comprehensive benefits of water resources in irrigation area was established on the premise of improving the weight vector decision method of different layers. The entropy weight evaluation of the first layer could be calculated as per the utility degree of information, which embodied variation extent of evaluation indices. The weight vectors of the intermediate layer could be determined by means of combining the entropy weights with linear subjective weights or mean value, which gave attention to both the preference of decision-makers and the objective data. Finally, the output of the topmost layer was used to evaluate the whole solution. A certain irrigation area in Shaanxi was taken as a verification example, and the results showed that all the benefit indices increased progressively. Scheme three of the year 2015 was the best one, in which the comprehensive benefits had increased 22.6% and 39.6% comparing with that in 1997 and 2005. The model not only to be used for program optimization, but also to evaluate the each scheme. The model is considered more reasonable and more feasible for comprehensive benefit evaluation in irrigation area than the other two methods in practice.

Number of references:  16

Main heading:  Water resources

Controlled terms:  Entropy  -  Irrigation  -  Optimization  -  Vectors  -  Weighing

Uncontrolled terms:  Comprehensive benefit  -  Comprehensive evaluation  -  Comprehensive weight vector  -  Decision makers  -  Decision method  -  Entropy weight  -  Entropy weights  -  Evaluation index  -  Intermediate layers  -  Irrigation area   -  Mean values  -  Multi objective  -  Multi-level  -  Multilevel comprehensive evaluation  -  Multilevel fuzzy optimization  -  Program optimization  -  Weight vector

Classification code:  444 Water Resources  -  641.1 Thermodynamics  -  821.3 Agricultural Methods  -  921.1 Algebra  -  921.5 Optimization Techniques  -  943.3 Special Purpose Instruments

DOI:  10.3969/j.issn.1002-6819.2009.07.010

Database:  Compendex

17.   Accession number:  20093612289656

Title:  Evaluation of soil ecological environment quality of typical black soils in Heilongjiang Province

Authors:  Lei, Guoping1 ; Dai, Lu1 ; Song, Ge1 

Author affiliation:  1  College of Resource and Environment, Northeast Agricultural University, Harbin 150030, China

 Corresponding author:  Lei, G. (guopinglei@126.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  243-248

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  Evaluation of soil ecological environment quality is the key foundation of the development, utilization as well as protection of the black soils. On the basis of previous research, Nenjiang county, Keshan county, Wudalianchi city and Hailun city of Heilongjiang Province were selected as the research region at macro and mesoscale, considering the influence factors and the existing status of soil ecological environment quality under the guidance of the standard of evaluation of soil environment, and using grading standards proportional, Delphi method and fuzzy comprehensive assessment were used to establish evaluation system of black soil ecological environment quality in the research region. The system included 13 factors related to soil erosion, soil pollution and degradation of soil fertility. The results indicated that there were some differences in soil environment of Heilongjiang Province. Specifically, the soil quality in Nenjiang, Wudalianchi and Keshan areas was slightly lower tham the mediumlevel, however the soil quality of Hailun was worse than that of three other cities. In the end, a series of measures including land management, engineering and farming technology were taken to improve the soil quality.

Number of references:  19

Main heading:  Erosion

Controlled terms:  Decision making  -  Ecology  -  Land use  -  Quality control  -  Research  -  Soil pollution  -  Soils  -  Technological forecasting

Uncontrolled terms:  Black soil  -  Black soils  -  Delphi method  -  Ecological environments  -  Environment quality  -  Evaluation system  -  Fuzzy comprehensive assessment  -  Heilongjian Province  -  Influence factors  -  Land managements   -  Mesoscale  -  Soil environment  -  Soil erosion  -  Soil fertility  -  Soil quality

Classification code:  912.2 Management  -  901.4 Impact of Technology on Society  -  901.3 Engineering Research  -  539.1 Metals Corrosion  -  483.1 Soils and Soil Mechanics  -  913.3 Quality Assurance and Control  -  483 Soil Mechanics and Foundations  -  454.2 Environmental Impact and Protection  -  442.2 Land Reclamation  -  407 Maritime and Port Structures; Rivers and Other Waterways  -  403 Urban and Regional Planning and Development  -  454.3 Ecology and Ecosystems

DOI:  10.3969/j.issn.1002-6819.2009.07.044

Database:  Compendex

18.   Accession number:  20093612289653

Title:  Cultivated land change forecast based on genetic algorithm and least squares support vector machines

Authors:  Zhang, Hao1 ; Luo, Yiyong2 ; Zhang, Liting2 ; Chen, Zhuan2 

Author affiliation:  1  College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310032, China

2  Technology Yangtze College, East China University, Nanchang 330013, China

Corresponding author:  Zhang, H. (zhanghao@zjut.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  226-231

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 prediction method of cultivated land change based on least squares support vector machines (LS-SVM) was developed by studying the inherent tendency toward land change and simulating the trajectories of changes in land use. A nonlinear dynamic model of cultivated land change and influence factors was introduced. The prediction accuracy was improved by using the genetic algorithm to automatically determine the optimal parameters of least squares support vector machines. The proposed model has been thoroughly tested on predicting the cultivated land change during the period of 1987-2000 in Wuxi, Jiangsu. The results were compared and analyzed with those obtained from multiple regression, GM(1,1), BP algorithm, support vector machines(SVM) and the survey data on cultivated land change. The evaluation of prediction precision showed that the method based on LS-SVM was far more accurate than multiple regression, GM(1,1) and BP network model. Compared with the support vector machines model, the method was even slightly better and possesses much less algorithm complexity and higher computational efficiency. The overall performance suggests that the method is effective in predicting land change.

Number of references:  20

Main heading:  Support vector machines

Controlled terms:  Backpropagation algorithms  -  Computational complexity  -  Computational efficiency  -  Forecasting  -  Genetic algorithms  -  Granular materials  -  Image retrieval  -  Land use  -  Vectors

Uncontrolled terms:  Accuracy analysis  -  Algorithm complexity  -  BP algorithm  -  BP networks  -  Cultivated lands  -  Cultivated lands change forecast  -  Influence factors  -  Least squares support vector machines  -  Multiple regressions  -  Nonlinear dynamic models   -  Optimal parameter  -  Prediction accuracy  -  Prediction methods  -  Prediction precision  -  Survey data

Classification code:  951 Materials Science  -  922.2 Mathematical Statistics  -  921.1 Algebra  -  921 Mathematics  -  912.2 Management  -  741 Light, Optics and Optical Devices  -  723.4 Artificial Intelligence  -  723.2 Data Processing and Image Processing  -  723.1 Computer Programming  -  723 Computer Software, Data Handling and Applications  -  721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory  -  442.2 Land Reclamation  -  403 Urban and Regional Planning and Development

DOI:  10.3969/j.issn.1002-6819.2009.07.041

Database:  Compendex

19.   Accession number:  20093612289631

Title:  Coupling relationships of nursing seedling densities and finger sticking area by mechanized hybrid rice transplanter

Authors:  Luo, Hanya1 ; Li, Ji1 ; Yuan, Zhaohe2 ; He, Ruiyin3 ; Ma, Zhengbao4 ; Zhang, Lu4 

Author affiliation:  1  Agricultural Machinery Technology Extension Central Station, Ministry of Agriculture, Beijing 100079, China

2  Jiangsu Agricultural Machinery Bureau, Nanjing 210024, China

3  College of Engineering, Nanjing Agricultural University, Nanjing 210031, China

4  Jiangsu Agricultural Machinery Technology Extension Station, Nanjing 210017, China

Corresponding author:  Luo, H. (lha888@sohu.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  98-102

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  In order to obtain the good quality of planted hybrid rice, nursing seedling density and finger sticking area were selected as two factors, and the tests of two factors with three levels were designed with hybrid rice 1596 as tested rice seed. The results showed that main indexes of qualities of nursing seedling, young seedling and field planted rice had significant correlations at level 0.05. T-test results of paired samples at level 0.05 showed that blank space ratios (or missing plant ratios) had significant differences for young seedling to nursing seedling, and for field planted rice to nursing seedling. Eligibility ratio of equality degree (ERED) for young seedling had significant differences to that of nursing seedling, and ERED for field planted rice had no significant differences to that of young seedling. The optimum test set nursing seedling density as 73 g per nursing tray and finger sticking area as 2.38 cm2, in this situation, blank space ratios (or missing plant ratios) and ERED of qualities of nursing seedling, young seedling and field planted rice were 1.1% and 92.5%, 2.6% and 90.2%, 5.1% and 88%, respectively, and target field rice plant was 541 665 per hectare.

Number of references:  19

Main heading:  Forestry

Controlled terms:  Machinery  -  Mechanization  -  Nursing

Uncontrolled terms:  Optimum test sets  -  Paired sample  -  Planting mechanization  -  Rice  -  Rice plants  -  Rice seed  -  Rice transplanter  -  Seedling density  -  Space ratio  -  Target fields   -  Test results  -  Transplanter

Classification code:  461.7 Health Care  -  601 Mechanical Design  -  821.0 Woodlands and Forestry

DOI:  10.3969/j.issn.1002-6819.2009.07.018

Database:  Compendex

20.   Accession number:  20093612289663

Title:  Effect of exogenous ethylene treatment at different MA storage periods on quality of peach fruits

Authors:  Zhu, Meiyun1 ; Zhu, Shiming1, 2 ; Wang, Guixi2 ; Liang, Lisong2 

Author affiliation:  1  College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China

2  Key Laboratory of Forest Silviculture of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China

Corresponding author:  Wang, G. (wanggx0114@126.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  283-287

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  In order to improve the quality of peach fruits during storage periods, authors investigated the effects of the treatment of 'Okubo' peach (Prunus persica L.Batsch) with exogenous ethylene (50-80 μL/L) at different modified atmosphere (MA) storage periods (0, 15 and 30 days). The soluble solids content (SSC), rot index, titratable acid (TA), total sugar, vitamin C contents were measured during storage and after 3-day shelf life at 20°C. The results showed that the treatment with exogenous ethylene at 15, 30 d during MA storage at 0°C could keep the fruit texture and SSC, and decrease the rot index. Peach fruit treated with exogenous ethylene at the 15th day could keep the content of total sugar and vitamin C, but TA has no significant difference. The research showed that treatment with exogenous ethylene at the 15th day during MA storage had the best effect.

Number of references:  17

Main heading:  Quality control

Controlled terms:  Ethylene  -  Fruits  -  Quality assurance  -  Quality function deployment  -  Sugar (sucrose)  -  Sugars  -  Total quality management

Uncontrolled terms:  Ethylene treatment  -  Exogenous ethylene treated time  -  Fruit quality control  -  Modified atmosphere  -  Modified atmosphere (MA) storage  -  Peach fruits  -  Prunus persica  -  Shelf life  -  Soluble solids content  -  Storage periods   -  Titratable acid  -  Vitamin C

Classification code:  804.1 Organic Compounds  -  821.4 Agricultural Products  -  822.3 Food Products  -  912.2 Management  -  913.3 Quality Assurance and Control  -  922.2 Mathematical Statistics

DOI:  10.3969/j.issn.1002-6819.2009.07.051

Database:  Compendex

21.   Accession number:  20093612289644

Title:  Evaluation index of lighting performance in multi-span greenhouse

Authors:  Cheng, Qinyang1 ; Ding, Xiaoming1 ; Qu, Mei2 

Author affiliation:  1  Chinese Academy of Agricultural Engineering, Beijing 100125, China

2  College of Agronomy and Biotechnology, China Agricultural University, Beijing 100083, China

Corresponding author:  Cheng, Q. (qinyangch@sina.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  169-172

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:  Lighting performance in greenhouse is crucial for heat gain and Photosynthetically Active Radiation (PAR) density for crop photosynthesis in greenhouse. At present, China lacks a series of the harmonious and standardized indices to evaluate lighting performance in greenhouse. On the basis of analyzing current research achievements, total solar radiation transmittance, PAR, uniformity of illuminance were suggested to determine lighting performance in multi-span greenhouse.

Number of references:  19

Main heading:  Greenhouses

Controlled terms:  Electromagnetic waves  -  Lighting  -  Offshore pipelines  -  Photosynthesis  -  Solar radiation  -  Sun

Uncontrolled terms:  Evaluation index  -  Heat gains  -  Illuminance uniformity  -  Multi-span greenhouses  -  Multi-spans  -  Photosynthetically active radiation

Classification code:  802.2 Chemical Reactions  -  741.1 Light/Optics  -  711 Electromagnetic Waves  -  707 Illuminating Engineering  -  821.6 Farm Buildings and Other Structures  -  657.2 Extraterrestrial Physics and Stellar Phenomena  -  619.1 Pipe, Piping and Pipelines  -  511.2 Oil Field Equipment  -  402.1 Industrial and Agricultural Buildings  -  657.1 Solar Energy and Phenomena

DOI:  10.3969/j.issn.1002-6819.2009.07.031

Database:  Compendex

22.   Accession number:  20093612289659

Title:  Analysis of flow field of the preparation of solid caramel pigment by extrusion

Authors:  Li, Lu1 ; Zhang, Yuzhong1 ; Yuan, Yang1 ; Zeng, Cheng1 

Author affiliation:  1  College of Mechanical Engineering, Jiangnan University, Wuxi 214122, China

Corresponding author:  Li, L. (lilu925@yahoo.com.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  260-265

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  The producing mechanism of the preparation of caramel pigment by screw extrusion was analyzed. By using the Mesh Superposition Technique provided by the package POLYFLOW the three-dimensional isothermal flows were simulated in the screws of the melt pumping section. Distribution laws of pressure, velocity, viscosity and shear rate of the flow domain in the process of preparation of caramel pigment were analyzed in order to understand the extrusion processing and provide reference for the optimization of screw extruder. The technology and processing parameters for the preparation of solid caramel pigment by extrusion from saccharose were discussed. Effects of the changes in the rotate speed of the screws and barrel temperature on the tinctorial power of caramel pigment were studied. Tinctorial power increased firstly, and then decreased with the increase of the rotate speed, while the tinctorial power increased with the increase of the barrel temperature.

Number of references:  14

Main heading:  Extrusion

Controlled terms:  Flow fields  -  Paint  -  Screws  -  Shear deformation  -  Sugar (sucrose)

Uncontrolled terms:  Barrel temperature  -  Caramel pigments  -  Distribution law  -  Extrusion processing  -  Flow domains  -  Isothermal flows  -  Mechanism analysis  -  Mesh superposition  -  Polyflow  -  Processing parameters   -  Rotate speed  -  Screw extruders  -  Screw extrusion  -  Shear rates

Classification code:  822.3 Food Products  -  816.1 Processing of Plastics and Other Polymers  -  813.2 Coating Materials  -  631.1 Fluid Flow, General  -  605 Small Tools and Hardware  -  539.2.2 Protecting Materials  -  535.2.2 Metal Forming Practice  -  422 Strength of Building Materials; Test Equipment and Methods  -  421 Strength of Building Materials; Mechanical Properties

DOI:  10.3969/j.issn.1002-6819.2009.07.047

Database:  Compendex

23.   Accession number:  20093612289665

Title:  Effects of heat treatment on flesh leatheriness and related enzyme activities of loquat fruits during cold storage

Authors:  Rui, Huaijin1 ; Wang, Kaituo1 ; Shang, Haitao1 ; Tang, Shuangshuang1 ; Jin, Peng1 ; Cao, Shifeng1 ; Zheng, Yonghua1 

Author affiliation:  1  College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China

Corresponding author:  Zheng, Y. (zhengyh@njau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  294-298

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 was conducted to investigate the effects of heat treatment on flesh leatheriness of cold-stored loquat fruits and the possible mechanisms. Freshly harvested loquat fruits were pre-treated with hot air at 38°C for five hours and then stored at (1±1)°C for 35 days. Fruits firmness, extractable juice rate, the activities of phenylalanine ammonium-lyase (PAL), peroxidase (POD), polyphenol oxidase (PPO) and polygalacturonase (PG) that were related to flesh leatheriness, and contents of lignin and pectin were analyzed at seven-day intervals during storage. The results indicated that heat treatment significantly delayed the increase of fruits firmness and the decrease of extractable juice rate, inhibited the increase of PAL, POD and PPO activities and the decrease of PG activity. Meanwhile, heat treatment reduced the accumulation of lignin and protopectin and maintained higher content of water soluble pectin, thereby prevented the development of flesh leatheriness and maintained the quality of cold-stored loquat fruits. These data suggest that the reduction of flesh leatheriness by heat treatment may be related to the inhibition of lignin synthesis and the enhancement of pectin solubilization.

Number of references:  21

Main heading:  Low temperature operations

Controlled terms:  Amino acids  -  Ammonium compounds  -  Cold storage  -  Enzymes  -  Fruits  -  Heat treatment  -  Lignin  -  Polysaccharides  -  Thermal effects  -  Water content

Uncontrolled terms:  Effects of heat treatment  -  Flesh leatheriness  -  Hot air  -  Lignin synthesis  -  Loquat fruitss  -  Low temperature storage  -  Polygalacturonase  -  Polyphenol oxidase  -  Protopectin  -  Water soluble pectins

Classification code:  951 Materials Science  -  801.2 Biochemistry  -  802.2 Chemical Reactions  -  802.3 Chemical Operations  -  804.1 Organic Compounds  -  804.2 Inorganic Compounds  -  811.3 Cellulose, Lignin and Derivatives  -  815.1.1 Organic Polymers  -  821.4 Agricultural Products  -  694.4 Storage  -  421 Strength of Building Materials; Mechanical Properties  -  444 Water Resources  -  461 Bioengineering and Biology  -  644.3 Refrigeration Equipment and Components  -  461.2 Biological Materials and Tissue Engineering  -  537.1 Heat Treatment Processes  -  641 Heat and Mass Transfer; Thermodynamics  -  531 Metallurgy and Metallography

DOI:  10.3969/j.issn.1002-6819.2009.07.053

Database:  Compendex

24.   Accession number:  20093612289669

Title:  Rural residential land consolidation and its effect on arable land

Authors:  He, Yingbin1, 2, 3 ; Chen, Youqi1, 3 ; Yang, Peng3 ; Xu, Xinguo1, 3 ; Yu, Qiangyi3 

Author affiliation:  1  Key Laboratory of Resources Remote Sensing and Digital Agriculture, Beijing 100081, China

2  Hulunber Grassland Ecosystem Observation and Research Station, Beijing 100081, China

3  Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Corresponding author:  Yang, P. (yangpeng@ccsr.u-tokyo.ac.jp) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  312-316

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  In order to clarify the objects and effects of rural residential land consolidation and its effect on quantity of arable land, related documents were summarized. In terms of summarized results, all the references could be categorized into three aspects which were land consolidation potential, land consolidation modes and policy suggestions for land consolidation. Existing problems in this regard were analyzed. Moreover, great significance of rural residential land consolidation for ensuring China's food security was highlighted. Eventually, several suggestions were proposed such as making a leading contribution to guide rural residential land consolidation by integrating theory with practice, and making great effort to implement rural residential land consolidation for increase of arable land quantity.

Number of references:  39

Main heading:  Land use

Controlled terms:  Planning  -  Regional planning

Uncontrolled terms:  Arable land  -  Land consolidation  -  Pattern  -  Policy  -  Potential  -  Rural residential lands

Classification code:  403 Urban and Regional Planning and Development  -  403.2 Regional Planning and Development  -  442.2 Land Reclamation  -  912.2 Management

DOI:  10.3969/j.issn.1002-6819.2009.07.057

Database:  Compendex

25.   Accession number:  20093612289660

Title:  Development of germinating rate model and influencing parameters for paddy rice drying in a deep fixed-bed

Authors:  Wang, Danyang1 ; Li, Chenghua2 ; Zhang, Benhua1 ; Ma, Jian1 ; Jin, Hongliang1 

Author affiliation:  1  Engineering College, Shenyang Agricultural University, Shenyang 110161, China

2  School of Mechanical Engineering, Shenyang Ligong University, Shenyang 110168, China

Corresponding author:  Li, C. (lch@syau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  266-270

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  To improve the quality of dried rice seed and solve the application limitation in existing models for predicting germinating rate of dried paddy, we conducted experiments of paddy drying in a deep fixed-bed by using a quadratic orthogonal rotating design. First order dynamic model for predicting germinating rate of paddy dried in deep fixed-bed was developed and verified, model parameters were optimized: undetermined constants of Z1=0.06011 and Z2=0.02558, activation energy of germ protein denaturation E=194.18333. Model examination showed that higher prediction accuracy was achieved with error square sum 0.48358. A regression model describing relations between experiment factor and germinating rate was developed, and impact of experiment factors on germinating rate was analyzed. The order of the factor was clarified though calculation of contribution rate. The two types of model were compared and the parameters for paddy drying were optimized by frequency analytical method. An optimum range of the parameters for germinating rate higher than 90% was given with 95% probability. The results provide useful references for parameter design of drying equipment and drying procedure of rice seed in practice.

Number of references:  15

Main heading:  Rate constants

Controlled terms:  Activation energy  -  Curing  -  Dewatering  -  Dryers (equipment)  -  Experiments  -  Regression analysis

Uncontrolled terms:  Analytical method  -  Contribution rate  -  Deep fixed-bed  -  Drying equipment  -  Drying models  -  First order  -  Fixed-bed  -  Germinating rate  -  Influencing parameters  -  Model parameters   -  Paddy rice  -  Parameter designs  -  Prediction accuracy  -  Protein denaturation  -  Rate models  -  Regression model  -  Rice seed  -  Square sum

Classification code:  922.2 Mathematical Statistics  -  901.3 Engineering Research  -  818.3 Rubber and Elastomer Processing  -  815.1 Polymeric Materials  -  931.3 Atomic and Molecular Physics  -  802.3 Chemical Operations  -  802.1 Chemical Plants and Equipment  -  801.4 Physical Chemistry  -  642.2 Industrial Furnaces and Components  -  802.2 Chemical Reactions

DOI:  10.3969/j.issn.1002-6819.2009.07.048

Database:  Compendex

26.   Accession number:  20093612289626

Title:  Analysis on inner aspiration of dual laterolog aspirating aerator

Authors:  Zhou, Jianlai1 ; Qiu, Baijing2 ; Zheng, Ming3 

Author affiliation:  1  Department of mechanical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China

2  Academy of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China

3  College of Environmental Engineering, Jiangsu University, Zhenjiang 212013, China

Corresponding author:  Zhou, J. (a177654444@126.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  72-78

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  In order to improve aspiration-efficiency of the jet aerator, an air-in pipe called inner pipe was set up to add one more aspiration in the aerator muzzle. Based on the CFD software FLUENT as well as experiments, the aerator internal fluidic field was computed and aspirating was analyzed. Conditions and status on inner aspirating were investigated in terms of pressure distribution, flowing velocity and volume fraction of air and water. Conclusions were drawed as follows: When the inner pipe was moved along the aerator axis among a certain range, it had an apparent impact on aspiration efficiency. If the axial location coefficient R equalled 0, the dual laterolog aspirating aerator reached its highest aspiration efficiency. Contrarily, while R=1, the aerator had its lowest aspiration efficiency. Furthermore, contrastive studies were carried out under conditions of no aspiration.

Number of references:  11

Main heading:  Dissolved oxygen

Controlled terms:  Agriculture  -  Aquaculture  -  Computer simulation  -  Computer simulation languages  -  Dissolution  -  Dissolved oxygen sensors  -  Electric logging  -  Fiber optics  -  Flow fields  -  Flow simulation   -  Jets  -  Machinery  -  Pipe

Uncontrolled terms:  Aspiration efficiency  -  Axial locations  -  CFD softwares  -  Dual laterolog  -  Flowing velocity  -  In-pipe  -  Inner aspiration  -  Numerical simulation

Classification code:  821.3 Agricultural Methods  -  619.1 Pipe, Piping and Pipelines  -  631.1 Fluid Flow, General  -  723.1.1 Computer Programming Languages  -  723.5 Computer Applications  -  741.1.2 Fiber Optics  -  801 Chemistry  -  802.3 Chemical Operations  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  601 Mechanical Design  -  444 Water Resources  -  445 Water Treatment  -  454.3 Ecology and Ecosystems  -  512.1.2 Development Operations  -  461.7 Health Care  -  462.1 Biomedical Equipment, General  -  471.5 Sea as Source of Minerals and Food  -  461.9 Biology

DOI:  10.3969/j.issn.1002-6819.2009.07.013

Database:  Compendex

27.   Accession number:  20093612289646

Title:  Formation cause and influencing factors of furfurals during the dilute acid hydrolysis of corn stalks

Authors:  Jiang, Tao1, 2 ; Lu, Peng1 ; Li, Guoxue1 

Author affiliation:  1  College of Resources and Environment Sciences, China Agricultural University, Beijing 100193, China

2  Department of Chemistry and Biology, Leshan Normal College, Leshan 614004, China

Corresponding author:  Li, G. (ligx@cau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  185-189

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  The formation regularity of the furfurals and main influencing factors during the dilute acid hydrolysis of corn stalks were studied. The results showed that the conversion reaction of hexose into hydroxymethyl furfural was the primary cause of forming the furfurals, and the efficiency of pentose transforming into furfural was lower. The concentration of reducing sugar was the largest factor which affected the concentration of the furfurals in the hydrolysate, and the concentration of the furfurals significantly correlated with the concentration of reducting sugar in test series. Due to the distinct influence of hydrolysis time on the concentration of the furfurals, the concentration of the furfurals was increased with the increase of hydrolysis time. Moreover, within the concentration range of 0.5%-2.0% of the diluted sulfuric acid, it could improve efficiently the conversion of hexose to hydroxymethyl furfural. Under the experimental conditions, the hydrolysis temperature and solid content had no obvious influence on the formation of the furfurals.

Number of references:  15

Main heading:  Furfural

Controlled terms:  Acids  -  Aldehydes  -  Concentration (process)  -  Hydrolysis  -  Methanol  -  Sugar (sucrose)  -  Sugars  -  Sulfuric acid

Uncontrolled terms:  Concentration of  -  Concentration ranges  -  Conversion reactions  -  Corn stalk  -  Corn straw  -  Dilute acid hydrolysis  -  Experimental conditions  -  Hydroxymethyl furfural  -  Influencing factor  -  Reducing sugars   -  Solid contents

Classification code:  822.3 Food Products  -  804.2 Inorganic Compounds  -  804.1 Organic Compounds  -  804 Chemical Products Generally  -  803 Chemical Agents and Basic Industrial Chemicals  -  802.3 Chemical Operations  -  802.2 Chemical Reactions

DOI:  10.3969/j.issn.1002-6819.2009.07.034

Database:  Compendex

28.   Accession number:  20093612289617

Title:  Spatial distribution pattern of soil salinity and saline soil in Yinchuan plain of China

Authors:  Zhang, Yuanpei1, 2 ; Hu, Kelin1 ; Li, Baoguo1 ; Zhou, Lina3 ; Luo, Yun3 ; Zhu, Jianning3 

Author affiliation:  1  College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China

2  Agricultural Biotechnology Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China

3  Institute of Resources and Environmental Sciences, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China

Corresponding author:  Li, B. (libg@cau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  19-24

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:  Understanding the characteristics of spatial distribution of saline soil is important in establishing strategies for soil salinity management. One hundred and one soil samples were collected from 0 to 180 cm in irrigation areas in Yinchuan Plain with an area of 6184.9 km2 and soil salinity for each sample was measured. The geostatistical method and GIS technique were used to analyze the data. The results showed that spatial distribution of salinity in each layer of soil presented highly skew distribution. The coefficient of variation for soil salinity belonged to medium degree of variability. Soil salinity in surface layer (0-120 cm) was spatially correlated at a distance between 20 and 28 km, while the spatial correlated distance for subsoil (120-180 cm) was larger (about 34 km). The areas of non-salinity, light salinity, medium salinity, heavy salinity and saline levels were 0, 1508.8, 3614.9, 982.6 and 78.6 km2, respectively. The soil salt concentrations of surface soil in Yinchuan plain were mostly classified at medium and light salinity levels, and presented a trend of soil salt accumulation. The saline soils were mainly distributed in Shizuishan County, Pingluo County, Huinong County in the north of Yinchuan and some areas of south Yinchuan. It is concluded that there is potential of salt accumulation in soils in the arid area and it needs further research for establishing management strategies.

Number of references:  21

Main heading:  Soil surveys

Controlled terms:  Arid regions  -  Light transmission  -  Salinity measurement  -  Size distribution  -  Soil pollution  -  Soils

Uncontrolled terms:  Geostatistics  -  Salt-affected soil  -  Soil salinity measurement  -  Spatial distribution  -  Yinchuan plain

Classification code:  943.3 Special Purpose Instruments  -  531.2 Metallography  -  741.1 Light/Optics  -  901.4 Impact of Technology on Society  -  922.2 Mathematical Statistics  -  931.2 Physical Properties of Gases, Liquids and Solids  -  933.1 Crystalline Solids  -  483.1 Soils and Soil Mechanics  -  454.2 Environmental Impact and Protection  -  444 Water Resources  -  443 Meteorology  -  423 Non Mechanical Properties and Tests of Building Materials  -  406.2 Roads and Streets  -  471.4 Seawater, Tides and Waves

DOI:  10.3969/j.issn.1002-6819.2009.07.004

Database:  Compendex

29.   Accession number:  20093612289616

Title:  Model for predicting soil thermal conductivity at various temperatures

Authors:  Lu, Sen1 ; Ren, Tusheng1 

Author affiliation:  1  Department of Soil and Water Sciences, China Agricultural University, Beijing 100193, China

Corresponding author:  Ren, T. (tsren@cau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  13-18

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 thermal conductivity is an essential parameter for studying the coupled transport of heat, water, and solute at land surface. It is generally recognized that soil thermal conductivity is increased at elevated temperatures due to the enhanced latent heat transfer. The objective of this study was to develop a model that was capable of predicting soil thermal conductivity at high temperatures. The gas diffusion law was applied and the latent heat transfer of vapor was introduced to a soil thermal conductivity model for moderate temperature. The performance of the model was examined by heat-pulse measurements of soil thermal conductivity at various temperatures and water contents. The results indicated that the vapor enhancement factor varied with soil texture and existed a great uncertainty. Thus the parameters of Cass et al that were used to estimate the vapor enhancement factor were modified. When the adjusted parameters were applied, the new model was able to predict soil thermal conductivity accurately at high temperatures.

Number of references:  28

Main heading:  Thermal conductivity of gases

Controlled terms:  Geologic models  -  Heat exchangers  -  Heat transfer  -  Latent heat  -  Soils  -  Thermal conductivity  -  Thermoanalysis  -  Thermoelectricity  -  Vapors

Uncontrolled terms:  Coupled transport  -  Elevated temperature  -  Enhancement factor  -  Gas diffusion  -  High temperature  -  Land surface  -  Moderate temperature  -  New model  -  Pulse measurements  -  Soil textures   -  Soil thermal conductivity

Classification code:  804 Chemical Products Generally  -  801 Chemistry  -  701.1 Electricity: Basic Concepts and Phenomena  -  641.2 Heat Transfer  -  931.2 Physical Properties of Gases, Liquids and Solids  -  641.1 Thermodynamics  -  615.4 Thermoelectric Energy  -  483.1 Soils and Soil Mechanics  -  481.1 Geology  -  616.1 Heat Exchange Equipment and Components

DOI:  10.3969/j.issn.1002-6819.2009.07.003

Database:  Compendex

30.   Accession number:  20093212244786

Title:  Effect of matrix-aeration-cultivation on water, gas and fertilizer in artificial nutrition matrix

Authors:  Chen, Hongbo1 ; Li, Tianlai1 ; Sun, Zhouping1 ; Wang, Wuhong2 ; Han, Lu1 

Author affiliation:  1  College of Horticulture, Shenyang Agricultural University, Key Laboratory of Protected Horticulture of Liaoning Province, Shenyang 110161, China

2  Institute of Vegetables, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Corresponding author:  Li, T. (tianlaili@126.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  198-203

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  In order to improve rhizoshpere environment in cucumber Cucumis sativus), aeration cultivation of artificial nutrition matrix (Z1) was compared with traditional cultivation of sandy loam (T1) and traditional cultivation of artificial nutrition matrix (CK), and changes in matrix enzyme activities, matrix nutrition contents and matrix physical characteristics were investigated in the experiment. The results showed that Z1 treatment improved matrix ventilation. To 60 days after cultivation, CO2re decreased by 59.81% and 48.21% respectively, and O2 contents were heightened by 13.66% and 5.87% respectively than those of T1 and CK treatment. Main enzyme activities in matrix of Z1 were higher than those of T1 and CK, such as phosphatase (81.88%, 28.53%), invertase (30.12%, 20.54%), dehydrogenase (22.61%, 15.89%) and urease (15.48%, 8.47%), respectively. Matrix nutrition contents were also elevated including available N, available P and available K. Matrix structure of Z1 was improved, total porosity, contents of salt and water in matrix were advanced, and bulk density was reduced. Finally, Z1 treatment increased yield of cucumber by 27.11% and 8.94% respectively than T1 and CK. Therefore, matrix-aeration-cultivation have advantages of saving water and fertilizer, improving matrix environment and heightening yield of cucumber.

Number of references:  20

Main heading:  Enzyme activity

Controlled terms:  Enzymes  -  Fertilizers  -  Nutrition  -  Water recycling

Uncontrolled terms:  Available P  -  Bulk density  -  Cucumis sativus  -  Gas environment in matrix  -  matrix  -  Matrix enzyme activity  -  Matrix structure  -  Matrix-aeration-cultivation  -  Physical characteristics  -  Sandy loams   -  Total porosity

Classification code:  822.3 Food Products  -  821.2 Agricultural Chemicals  -  804.1 Organic Compounds  -  804 Chemical Products Generally  -  801.2 Biochemistry  -  461.9 Biology  -  461.7 Health Care  -  461.2 Biological Materials and Tissue Engineering  -  453.2 Water Pollution Control  -  445.1 Water Treatment Techniques  -  444 Water Resources

DOI:  10.3969/j.issn.1002-6819.2009.06.037

Database:  Compendex

31.   Accession number:  20093612289636

Title:  Operational retrieving of land surface evapotranspiration based on remote sensing technology

Authors:  Zhou, Chuan1, 2 ; Niu, Zheng1 

Author affiliation:  1  State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Acad. of Sci., Beijing 100101, China

2  Graduate University, Chinese Acad. of Sci., Beijing 100039, China

Corresponding author:  Zhou, C. (zhouchuan15@gmail.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  124-130

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  The current situation of urgent requirement and obstacles in retrieving land surface evapotranspiration (ET) operationally were analyzed. By the comparison of the most commonly and widely used models for ET estimation, taking into account for the principles of independence, simplicity, versatility, scalability for operational retrieving, and selecting the Priestley-Taylor(PT) model as the key algorithm,,an operational technical flow-scheme was established to obtain the daily ET. With the support of MODIS data and meteorological data, taking Heihe river basin as experiment area, the model and flow-scheme were verified, and daily ET were retrieved. Evaluation of the relative accuracy of operational ET estimation flow-scheme was made by using FAO56 Penman-Monteith model supposed to be the standard model. High correlation coefficients of 0.880 were observed by these two models. Results with relatively high accuracy proved that the PT model and the flow-scheme were workable, and sufficient to satisfy the requirement of operational processing, and it was worthwhile to utilize them for the future operational ET retrieving.

Number of references:  26

Main heading:  Atmospheric movements

Controlled terms:  Evapotranspiration  -  Phototransistors  -  Remote sensing  -  Rivers  -  Surface measurement  -  Water supply  -  Watersheds

Uncontrolled terms:  Heihe River basin  -  Land surface evapotranspiration  -  Operational  -  Penman-Monteith model  -  Priestley-taylor model

Classification code:  943.2 Mechanical Variables Measurements  -  802.3 Chemical Operations  -  741.3 Optical Devices and Systems  -  731.1 Control Systems  -  714.2 Semiconductor Devices and Integrated Circuits  -  446.1 Water Supply Systems  -  444.1 Surface Water  -  443.1 Atmospheric Properties  -  407.2 Waterways

DOI:  10.3969/j.issn.1002-6819.2009.07.023

Database:  Compendex

32.   Accession number:  20093612289622

Title:  Impact forecast of future climate change on maize water requirement in three provinces of Northeast China

Authors:  Zhang, Jianping1, 2 ; Wang, Chunyi3 ; Yang, Xiaoguang1 ; Zhao, Yanxia3 ; Liu, Zhijuan1 ; Wang, Jing1 ; Chen, Yanying2 

Author affiliation:  1  College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China

2  Chongqing Institute of Meteorological Sciences, Chongqing 401147, China

3  Chinese Academy of Meteorological Sciences, Beijing 100081, China

Corresponding author:  Yang, X. (yangxg@cau.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  50-55

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  Based on the change of the reference crop evapotranspiration and crop water requirement during development stage of maize in recent 26 years in three provinces of Northeast China, combined with the climate change scenario A2 (concentration on the economic development) and B2 (concentration on the sustainable development) of Special Report on Emissions Scenarios (SRES), the change trend of impact of future climate change on maize water requirement was studied. Results showed that there would be a significant increasing trend in anomaly percentage of maize water requirement under climate change in most sites in three provinces of Northeast China, the increased amount would even be about 77.8% at most, and the spatial distribution of water requirement was different under different geographical and climatic environment. Under A2 scenario, anomaly percentage of maize water requirement might increase by about 27.2% by 2040, about 34.5% by 2070 and 42.9% by 2100; Under B2 scenario, anomaly percentage of maize water requirement might also increase by about 28.6% by 2040, about 33.3% by 2070 and 37.3% by 2100. So there will be a tendency of water resource deficiency in three provinces of Northeast China in the future.

Number of references:  16

Main heading:  Climate change

Controlled terms:  Crops  -  Evapotranspiration  -  Size distribution  -  Strategic planning  -  Water supply

Uncontrolled terms:  Climate change scenarios  -  Crop evapotranspiration  -  Crop water requirements  -  Development stages  -  Economic development  -  Future climate  -  Maize  -  Northeast China  -  Reference evapotranspiration  -  Spatial distribution   -  Special report on emissions scenarios  -  Water requirement  -  Water requirements

Classification code:  931.2 Physical Properties of Gases, Liquids and Solids  -  922.2 Mathematical Statistics  -  912.2 Management  -  821.4 Agricultural Products  -  802.3 Chemical Operations  -  933.1 Crystalline Solids  -  531.2 Metallography  -  446.1 Water Supply Systems  -  444.1 Surface Water  -  443.1 Atmospheric Properties  -  423 Non Mechanical Properties and Tests of Building Materials  -  451 Air Pollution

DOI:  10.3969/j.issn.1002-6819.2009.07.009

Database:  Compendex

33.   Accession number:  20093612289620

Title:  Effect of saline water for increasing soil water before sowing on helianthus growth and saline distributional characteristics of soil

Authors:  Bi, Yuanjie1 ; Wang, Quanjiu1, 2 ; Xue, Jing1 

Author affiliation:  1  Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an 710048, China

2  State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Acad. of Sci., Yangling 712100, China

Corresponding author:  Wang, Q. (wquanjiu@163.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  38-44

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 effect of saline water for increasing soil water before sowing on helianthus growth and saline distributional characteristics of soil, the method of coupling pot experiment with field plot experiment had been adopted, and saline water for increasing soil water before sowing had been divided into four levels (3, 4, 5, 6 g/L), fresh water treatment as the contrast. The results show that saline water for increasing soil water before sowing restrain rate of emergence and seeding emergence time to different degrees. When the salinity of irrigation water for increasing soil water before sowing is the same, the rate of emergence of field plot treatment is lower than that of corresponding pot treatment, and seeding emergence time of field plot treatment is longer than that of corresponding pot treatment. The growth of helianthus has not been restrained but stimulated using the saline water which total salinity is 3 g/L. The growth parameters such as plant height, leaf area index and root/shoot ratio are all greater than those of fresh water treatment. Compared with fresh water treatment, the grain number of one disc and hundred-grain weight of 3 g/L treatment are all increased, the rate of unfilled grain decreases by 19.7%, and yield increases by 8.1%. The yields of helianthus which are treated with 4, 5 and 6 g/L saline water decrease by 7.0%, 14.8%, 23.9%, respectively. When growth duration finished, average soil salinity of 0-20 cm soil layer with all treatments is close to initial value without notable desalination or salification phenomena, and 20-40 cm and 40-120 cm soil layer with all treatments are in salification state to different extents, which salification degree increase with the increase of salinity of irrigation water and the deeper soil layer, the higher salt content.

Number of references:  15

Main heading:  Saline water

Controlled terms:  Chemicals removal (water treatment)  -  Desalination  -  Experiments  -  Irrigation  -  Salinity measurement  -  Soil moisture  -  Underwater soils  -  Water content  -  Water filtration  -  Water recycling   -  Water supply

Uncontrolled terms:  Field plot  -  Fresh Water  -  Grain numbers  -  Grain weights  -  Growth parameters  -  Helianthus  -  Initial values  -  Irrigation waters  -  Leaf Area Index  -  Plant height   -  Pot experiment  -  Root/shoot ratio  -  Salt content  -  Soil layer  -  Soil salinity  -  Soil water  -  Yield increase

Classification code:  943.3 Special Purpose Instruments  -  483.1 Soils and Soil Mechanics  -  802.3 Chemical Operations  -  803 Chemical Agents and Basic Industrial Chemicals  -  804 Chemical Products Generally  -  821.3 Agricultural Methods  -  901.3 Engineering Research  -  471.4 Seawater, Tides and Waves  -  453.2 Water Pollution Control  -  452.3 Industrial Wastes  -  446.1 Water Supply Systems  -  445.1 Water Treatment Techniques  -  444 Water Resources  -  471.1 Oceanography, General

DOI:  10.3969/j.issn.1002-6819.2009.07.007

Database:  Compendex

34.   Accession number:  20093612289649

Title:  Catalytic conversion of biomass pyrolysis tar model compound

Authors:  Sun, Haiquan1, 2 ; Zhang, Xiaodong1 ; Chen, Lei1 ; Zhao, Baofeng1 ; Yi, Weiming2 

Author affiliation:  1  Energy Research Institute of Shandong Academy of Sciences, Jinan 250014, China

2  School of Light Industry and Agriculture Engineering, Shandong University of Technology, Zibo 255049, China

Corresponding author:  Zhang, X. (xd_zhang77@yahoo.com.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  201-203

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:  Tar from biomass pyrolysis is harmful to the gasification system and gas consuming equipment. For the tar conversion, with n-heptane and cyclohexane as model compounds on a fixed-bed reactor, effects of cracking temperature, S/C and residence time on the tar conversion rate were investigated using nickel-based catalyst. The results showed that the conversion rate of n-heptane and cyclohexane increased with temperature increasing between 600-800°C. The conversion rate of n-heptane reached 95% at 750°C, while the conversion rate of cyclohexane reached 88.7%. Vapor amount had some effects on conversion rate, but it could affect the gaseous composition and alleviate the carbon deposition on the catalyst surface. Contact time between model compound and catalyst was extended with residence time increasing. The conversion rate of n-heptane and cyclohexane increased when the residence time increased. The results show nickel-based catalyst(Z417) has better catalytic effects on model compounds of biomass tar such as n-heptane and cyclohexane.

Number of references:  16

Main heading:  Catalytic cracking

Controlled terms:  Biomass  -  Catalysis  -  Catalysts  -  Chemical reactors  -  Cyclohexane  -  Heptane  -  Nickel  -  Nickel alloys  -  Pyrolysis  -  Tar   -  Thermogravimetric analysis

Uncontrolled terms:  Biomass pyrolysis  -  Biomass tar  -  Carbon deposition  -  Catalyst surfaces  -  Catalytic conversion  -  Catalytic effects  -  Contact time  -  Conversion rates  -  Fixed-bed reactors  -  Model compound   -  n-Heptanes  -  Nickel-based catalyst  -  Nickel-based catalysts  -  Residence time  -  Tar model compounds

Classification code:  801 Chemistry  -  802.1 Chemical Plants and Equipment  -  802.2 Chemical Reactions  -  821.5 Agricultural Wastes  -  803 Chemical Agents and Basic Industrial Chemicals  -  804.1 Organic Compounds  -  805.1.1 Biochemical Engineering  -  804 Chemical Products Generally  -  548.2 Nickel Alloys  -  548.1 Nickel  -  411 Bituminous Materials  -  513 Petroleum Refining  -  513.1 Petroleum Refining, General  -  522 Gas Fuels  -  524 Solid Fuels  -  525.1 Energy Resources and Renewable Energy Issues

DOI:  10.3969/j.issn.1002-6819.2009.07.037

Database:  Compendex

35.   Accession number:  20093612289658

Title:  Simulation and analysis of drying process for recirculating grain dryer

Authors:  Chen, Yiqun1 ; Chang, Chun1 ; Hu, Zhichao1 ; Wang, Haiou1 ; Wu, Feng1 

Author affiliation:  1  Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China

Corresponding author:  Chen, Y. (chenyq@nriam.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  255-259

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 theory of thin-layer drying equations was used to set up a drying model which could simulate recirculating grain dryer. The model could be used to calculate the data of drying time, energy consumption, tempering coefficient, as well as the changes of grain moisture, temperature and humidity of exhaust air in drying process. By experimental validation, the model simulation conformed to the experimental results, and the model could be used to analyze the same kind of dryer's working condition, and provide effective technical means for research and development as well as the improvement of the dryers. According to the model calculation, selecting appropriate temperature and mass flow rate of air can balance drying time and energy consumption, and the operation that could save energy and improve the grain quality was to keep low drying temperature at the initial stage of drying and gradually increase it. Proper increase in drying section cubage will significantly reduce drying time and energy consumption.

Number of references:  16

Main heading:  Low temperature drying

Controlled terms:  Curing  -  Dewatering  -  Dryers (equipment)  -  Drying  -  Grain (agricultural product)  -  Moisture  -  Simulators

Uncontrolled terms:  Dryer  -  Drying model  -  Drying process  -  Drying temperature  -  Drying time  -  Energy consumption  -  Exhaust air  -  Experimental validations  -  Grain drying  -  Grain quality   -  Initial stages  -  Mass flow rate of air  -  Model calculations  -  Model simulation  -  Research and development  -  Rice  -  Save energy  -  Simulation  -  Simulation and analysis  -  Thin layer drying   -  Working conditions

Classification code:  671 Naval Architecture  -  801.4 Physical Chemistry  -  802.1 Chemical Plants and Equipment  -  821.4 Agricultural Products  -  802.2 Chemical Reactions  -  815.1 Polymeric Materials  -  818.3 Rubber and Elastomer Processing  -  802.3 Chemical Operations  -  662.1 Automobiles  -  657.1 Solar Energy and Phenomena  -  443.1 Atmospheric Properties  -  621 Nuclear Reactors  -  642.1 Process Heating  -  642.2 Industrial Furnaces and Components  -  654.1 Rockets and Missiles  -  655.2 Satellites

DOI:  10.3969/j.issn.1002-6819.2009.07.046

Database:  Compendex

36.   Accession number:  20093612289637

Title:  Design of agricultural product trace coding based on geography coordinate and multi-encrypt

Authors:  Yang, Xinting1, 2 ; Qian, Jianping1, 2 ; Zhang, Zheng1, 2 ; Ji, Zengtao1, 2 ; Liu, Xuexin1, 2 ; Zhao, Li1, 2 

Author affiliation:  1  National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China

2  Key Laboratory for Information Technologies in Agriculture, Ministry of Agriculture, Beijing 100097, China

Corresponding author:  Yang, X. (yangxt@nercita.org.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  131-135

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:  Uniform trace code is the basis for implementing traceability in farm products. A coding scheme that was composed of producing area position code, product code, production date code and attestation type code was designed. Producing area position code was consisted of 13 bits of longitude and latitude, which was converted to ten bits of relative position code and one position identifier by plotting six districts according to the range characters of longitude and latitude in China. Production date code was converted three bits of relative date code and one bit of date identifier. Product code was converted to five bits. The validation code was generated by permutation and combination of position identifier, date identifier and attestation type code. The design of this trace code has the characteristics of short code extent and strong encryption. With it for farm product traceability, the key quality safety information such as production area position, produce date and attestation type can be traced without the support of database.

Number of references:  13

Main heading:  Product design

Controlled terms:  Agricultural products  -  Cryptography  -  Encoding (symbols)  -  Inventory control

Uncontrolled terms:  Coding scheme  -  Encoding  -  Encryption  -  Geography coordinate  -  Position codes  -  Product code  -  Product traceability  -  Production area  -  Quality safety  -  Relative dates   -  Relative positions  -  Short codes  -  Trace code  -  Traceability

Classification code:  911.3 Inventory Control  -  821.4 Agricultural Products  -  723.2 Data Processing and Image Processing  -  913.1 Production Engineering  -  723 Computer Software, Data Handling and Applications  -  717 Optical Communication  -  716 Telecommunication; Radar, Radio and Television  -  718 Telephone Systems and Related Technologies; Line Communications

DOI:  10.3969/j.issn.1002-6819.2009.07.024

Database:  Compendex

37.   Accession number:  20093612289655

Title:  Prediction of the spatial distribution of soil properties based on environmental correlation and geostatistics

Authors:  Lian, Gang1, 2 ; Guo, Xudong2 ; Fu, Bojie3 ; Hu, Chenxia4 

Author affiliation:  1  Zhejiang Environmental Monitoring Center, Hangzhou 310012, China

2  Key Laboratory of Land Use, Ministry of Land and Resources, Beijing 100035, China

3  State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Acad. of Sci., Beijing 100085, China

4  College of Economics and Management, China Jiliang University, Hangzhou 310018, China

Corresponding author:  Lian, G. (lian.gang@163.com) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

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:  As the most important determinants of soil quality, soil properties significantly influenced land use and ecological processes. On the landscape scale, a comprehensive understanding and consideration of soil spatial variation was essential for establishing an ecological and environmental process modeling. Spatial variation of soil properties (include bulk density (BD), soil organic matter (SOM) and total phosphorus (TP)) was analyzed and predicted according to environmental indicators based on data from 254 points of surface soil (0-20 cm) by digital terrainin and remote sensing image analysis technique in Hengshan county on the Loess Plateau. The relationship between soil properties , terrain attributes and remote sensing indices was analyzed. Finally, environment variables were used to predict spatial distribution of soil properties by multiple-linear regression analysis and geo-statistical. The results showed that BD and SOM were positively correlated with terrain attributes and remote sensing indices, but TP has little significant correlation with remote sensing indices. The multiple-linear stepwise regression model was relatively precise for the BD and SOM, but for TP, the predicted result was poor. The regression-Kriging method can effectively reduce residuals in prediction by eliminating smoothing effect, and its predicted values are quite close to the measured.

Number of references:  26

Main heading:  Soil surveys

Controlled terms:  Geomorphology  -  Image analysis  -  Image reconstruction  -  Land use  -  Organic compounds  -  Phosphorus  -  Regression analysis  -  Remote sensing  -  Size distribution  -  Soils   -  Strength of materials

Uncontrolled terms:  Bulk density  -  Ecological process  -  Environment indicators  -  Environmental correlations  -  Environmental indicators  -  Environmental process  -  Geo-statistics  -  Landscape scale  -  Loess plateau  -  Regression-kriging   -  Remote sensing images  -  Remote sensing index  -  Smoothing effects  -  Soil organic matters  -  Soil properties  -  Soil property  -  Soil quality  -  Spatial distribution  -  Spatial prediction  -  Spatial variations   -  Stepwise regression  -  Surface soil  -  Terrain attributes  -  Total phosphorus

Classification code:  951 Materials Science  -  723.2 Data Processing and Image Processing  -  731.1 Control Systems  -  741 Light, Optics and Optical Devices  -  804 Chemical Products Generally  -  804.1 Organic Compounds  -  922.2 Mathematical Statistics  -  931.2 Physical Properties of Gases, Liquids and Solids  -  933.1 Crystalline Solids  -  531.2 Metallography  -  403 Urban and Regional Planning and Development  -  406.2 Roads and Streets  -  421 Strength of Building Materials; Mechanical Properties  -  483.1 Soils and Soil Mechanics  -  422 Strength of Building Materials; Test Equipment and Methods  -  442.2 Land Reclamation  -  481.1.1 Geomorphology  -  423 Non Mechanical Properties and Tests of Building Materials

DOI:  10.3969/j.issn.1002-6819.2009.07.043

Database:  Compendex

38.   Accession number:  20093612289624

Title:  Test method of steering dynamic characteristics of differential steering mechanism of tracked vehicle

Authors:  Jing, Chongbo1 ; Wei, Chao1 ; Li, Xueyuan1 ; Peng, Zengxiong1 

Author affiliation:  1  National Key Laboratory of Vehicular Transmission, Beijing Institute of Technology, Beijing 100081, China

Corresponding author:  Wei, C. (weipeter1@bit.edu.cn) 

Source title:  Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:  Nongye Gongcheng Xuebao

Volume:  25

Issue:  7

Issue date:  July 2009

Publication year:  2009

Pages:  62-66

Language:  Chinese

ISSN:  10026819

CODEN:  NGOXEO

Document type:  Journal article (JA)

Publisher:  Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:  The characteristics of power flow of bilateral track of tracked vehicle in different steering radii were researched, and the working principle of hydraulic continuous differential steering mechanism was analyzed. Based on that, the test scheme of steering process in test bench was given, and the method of simulating engine characteristics with driving instrument and simulating dynamic load with loading instrument were researched, and the tests of steering of hydraulic continuous differential steering mechanism were finished. The results showed that the characteristics that inside track changed working situation from output power to input power and outside track increased output power in steering process could be simulated in test bench with hydraulic secondary regulation. The test method succeeds in resolving the problem of test implementation in test bench for steering characteristics of steering mechanism of tracked vehicle.

Number of references:  16

Main heading:  Steering

Controlled terms:  Automobile steering equipment  -  Hydraulics  -  Testing

Uncontrolled terms:  Differential steering mechanism  -  Input power  -  Output power  -  Power flows  -  Secondary regulation  -  Steering characteristics  -  Steering dynamics  -  Steering mechanisms  -  Test benches  -  Test method   -  Test scheme  -  Tracked vehicles  -  Working principles