<RECORD 1>

Accession number:20121915008034
Title:Diagnosis model of tomato nutrient content based on multispectral images
Authors:Ding, Yongjun (1); Li, Minzan (1); Sun, Hong (1); Li, Xiuhua (1); Zhao, Ruijiao (1)
Author affiliation:(1) Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing 100083, China; (2) College of Information Engineering, Lanzhou City University, Lanzhou 730030, China
Corresponding author:Li, M.(limz@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:175-180
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 estimate nutritional level and growth status of tomato leaves in greenhouse fast and accurately, the correlation between the nutrient content and every multispectral image feature was studied. The multispectral images of the tomato leaves were acquired in the natural sunlight condition, and then the multi-scale Retinex algorithm was adopted to reduce the imaging degradation caused by the nonflatness of the leaf surface. Based on color model, vegetation indices of NDVI and RVI, 49 characteristic parameters of multispectral images were defined and calculated. Correlation analysis and systematic cluster analysis were used to eliminate multivariate collinearity of the above-mentioned self-defined parameters and finally four optimal parameters were extracted. The stepwise multiple regression was used to develop the prediction models of the SPAD value and nitrogen content of tomato leaf. The result showed that the model had higher predictive ability. The R-Square and RMSE of SPAD model were 0.8668 and 3.997, and the R-Square and RMSE of nitrogen model were 0.7284 and 0.5130, respectively.
Number of references:20
Main heading:Fruits
Controlled terms:Chlorophyll - Cluster analysis - Degradation - Forestry - Mathematical models - Nitrogen
Uncontrolled terms:Characteristic parameter - Collinearity - Color models - Correlation analysis - Diagnosis model - Leaf surfaces - Multi-scale Retinex - Multispectral images - Natural sunlight - Nitrogen content  - Nitrogen models - Nutrient contents - Optimal parameter - Prediction model - Predictive abilities - R square - Stepwise multiple regression - Tomato - Tomato leaf - Tomato leaves  - Vegetation index
Classification code:921 Mathematics - 821.4 Agricultural Products - 821.0 Woodlands and Forestry - 922 Statistical Methods - 804.1 Organic Compounds - 802.2 Chemical Reactions - 723 Computer Software, Data Handling and Applications - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2012.08.027
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 2>

Accession number:20121915008009
Title:Simulation and uncertainty analysis of net irrigation requirement in agricultural area
Authors:Ma, Lihua (1); Kang, Shaozhong (2); Su, Xiaoling (1); Tong, Ling (2)
Author affiliation:(1) College of Water Resources and Architecture Engineering, Northwest Agricultural and Forest University, Yangling 712100, China; (2) Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China
Corresponding author:Kang, S.(kangshaozhong@tom.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:11-18
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:Net irrigation requirement is the major component of agricultural water use. In this study, the regional net irrigation requirement of agricultural area in Shiyang river basin in semi-arid region of Northwest China was analyzed. Based on the zones of local agricultural water use, the key factors are chosen by driving factor analysis (1959-2005), and then regional net irrigation requirement was simulated using multiple-linear regression (MLR), artificial neural network (ANN) and Ensemble ANN models. Then discrimination time-series Monte-Carlo (MC) simulation is used for inputs uncertainty analysis of these models. Results suggest that compared with MLR and ANN, the Ensemble ANN model show better ability in the simulation of regional net irrigation requirement with smallest error and lowest uncertainty index.
Number of references:28
Main heading:Computer simulation
Controlled terms:Arid regions - Irrigation - Monte Carlo methods - Neural networks - Uncertainty analysis - Water supply
Uncontrolled terms:Agricultural areas - Agricultural water use - MONTE CARLO - Multiple-linear regression - NorthWest China - River basins - Semi-arid region
Classification code:922.1 Probability Theory - 821.3 Agricultural Methods - 723.5 Computer Applications - 922.2 Mathematical Statistics - 723.4 Artificial Intelligence - 444 Water Resources - 443 Meteorology - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2012.08.002
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 3>

Accession number:20121915008051
Title:Sexual discrimination of silkworm cocoon based on X-ray imaging
Authors:Cai, Jianrong (1); Liu, Bing (1); Li, Yongping (2); Sun, Li (1)
Author affiliation:(1) School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (2) School of Electronic and Information, Ningbo Dahongying University, Ningbo 315175, China
Corresponding author:Cai, J.(jrcai@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:275-279
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 seperate reeling of male and female cocoon, a novel method for sexual discrimination of silkworm cocoons based on X-ray imaging technique was proposed. Images of silkworm chrysalis were obtained by X-ray imaging device, and then seven shape features were extracted after pre-processing of silkworm cocoons images. Discrimination models were established by linear discriminant analysis (LDA) and back propagation artificial neural network (BPANN), respectively. The results showed that the performance of LDA was better than that of BPANN between the same species in the same period, the same species at different period of time, and the different species of the same period; the accuracy the recognition of LDA models were larger than 91.33%, 86.73%, 89.53%, respectively; the accuracy of BPANN models were larger than 88.47%, 81.97%, 83.26%, respectively, while the recognition time of LDA model was (68.5 ms) much lower than BPANN model (503.6 ms). The results provide theoretical bases in the real-time testing of cocoon gender.
Number of references:16
Main heading:Animals
Controlled terms:Image analysis - Imaging techniques - Models - Neural networks - X ray analysis - X ray films
Uncontrolled terms:Back propagation artificial neural network (BPANN) - Discrimination model - Linear discriminant analysis - Pre-processing - Real-time testing - Recognition time - Sexual discrimination - Shape features - Silkworm cocoons - Theoretical basis  - X-ray imaging devices - X-ray imaging techniques - Xray imaging
Classification code:951 Materials Science - 902.1 Engineering Graphics - 822 Food Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 814 Leather and Tanning - 801 Chemistry - 746 Imaging Techniques - 742.3 Photographic Materials and Chemicals - 741 Light, Optics and Optical Devices - 471 Marine Science and Oceanography - 461.1 Biomedical Engineering - 461 Bioengineering and Biology - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2012.08.044
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 4>

Accession number:20121915008019
Title:Control strategy for hydro-mechanical differential turning system of tracked vehicles
Authors:Wu, Di (1); Yao, Jin (1); Li, Hua (1); Qian, Bo (2)
Author affiliation:(1) School of Manufacturing Science and Engineering, Chengdu 610065, China; (2) School of Engineering and Technology, Xichang College, Xichang 615000, China
Corresponding author:Yao, J.(zhediwubowen@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:78-83
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 achieve accurately the driver's steering intention and solve the steering control problem in the tracked vehicles with hydro-mechanical differential turning system, a dynamic model of hydro-mechanical differential turning system was deduced by analyzing working principle of a hydro-mechanical differential turning system and using dynamics principle and modular method in this paper, and mathematical model of the system was established. Based on the steering travel theory of tracked vehicles and the requirements of steering safety and the mathematical model proposed, a control strategy of hydro-mechanical differential turning system was designed, of which steering control was realized by coordination its control unit with displacement controller of hydraulic pump. The simulation results showed that the control strategy was safe and effective, and the driver's steering intention can be achieved exactly.
Number of references:19
Main heading:Automobile steering equipment
Controlled terms:Mathematical models - Steering - Tracked vehicles - Turning - Variable speed transmissions
Uncontrolled terms:Control strategies - Control unit - Driver's steering - Hydraulic pump - Hydro-mechanical - Modular methods - Steering control - Steering safety - Turning systems - Working principles
Classification code:602.2 Mechanical Transmissions - 604.2 Machining Operations - 663 Buses, Tractors and Trucks - 663.2 Heavy Duty Motor Vehicle Components - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.08.012
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 5>

Accession number:20121915008041
Title:Fuzzy classification of arid and semi-arid region features using multi-resolution data
Authors:J., Liu; W., Cao; Z., Pei; L., Guo; Q., Wu
Author affiliation:(1) College of Machine and Electrical Engineering, Shihezi University, Shihezi 832000, China; (2) Agricultural Resources Monitoring Station, Chinese Academy of Agricultural Engineering, Beijing 100125, China
Corresponding author:Cao, W.(wbc828@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:220-224
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To further improve classification accuracy of low-resolution remote data in arid and semi-arid areas, taking Shihezi county in Xinjiang province as the study area, sample windows were selected by combining PSA (purposive selection algorithm) algorithm and statistical properties of region features distribution and finally the best sample window combinations were identified. Authentic membership function was obtained by probability density estimation. Then features identifying model of the region was constructed based on category membership function, and the remote classification flowing chart of large-scale land using/covering was established by using multi-resolution data. The result showed that the classification accuracy of low-resolution data were effectively improved by extracting exquisite distribution characteristics of features in various regions through the high spatial indentifying data, compared with method of Erdas unsupervised classification, the accuracy of fuzzy classification method was improved 20%. The research provides a useful reference and guidance in the researching and application of low-resolution data.
Number of references:15
Main heading:Data mining
Controlled terms:Algorithms - Arid regions - Classification (of information) - Fuzzy systems - Membership functions - Remote sensing
Uncontrolled terms:Arid and semi-arid regions - Category membership functions - Classification accuracy - Distribution characteristics - Fuzzy classification - Fuzzy classification methods - Identifying models - Indentifying - Multiresolution data - Probability density estimation  - Region feature - Remote data - Sample windows - Selection algorithm - Semiarid area - Statistical properties - Study areas - Unsupervised classification - Xinjiang
Classification code:443 Meteorology - 444 Water Resources - 716.1 Information Theory and Signal Processing - 723.3 Database Systems - 731.1 Control Systems - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.08.034
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 6>

Accession number:20121915008013
Title:Effects of laminated rock fragments on soil infiltration processes in Karst regions
Authors:Dang, Hongyu (1); Chen, Hongsong (1); Shao, Ming'an (3)
Author affiliation:(1) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; (2) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; (3) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling 712100, China; (4) Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Sciences, Huanjiang 547100, China; (5) Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources, Chinese Academy of Sciences, Beijing 100101, China
Corresponding author:Chen, H.(hbchs@isa.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:38-43
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Laminated rock fragments (LRF) are widely existed in karst areas of Northwest Guangxi, China, and their effects on soil infiltration processes are very important for water cycle mechanisms and vegetation rehabilitation in karst region. In this paper, through laboratory soil-column experiments, the effects of LRF (gravitational soil-stone ratio=1: 1) with different rock fragment sizes (5-20 and 20-40 mm in diameter) and positions (top(0-20 cm), middle (10-30 cm) and lower(20-40 cm)) on soil infiltration processes were analyzed. The results showed that the cumulative infiltration capacity was the highest when LRF was located in the middle position (10-30 cm) with the size of 5-20 mm. However, when it was located in the lower position (20-40 cm), the cumulative infiltration capacity reached the highest with the size of 20-40 mm. The relatively small size of rock fragments benefits soil infiltration for a certain position of LRF. When rock fragment size was 5-20 mm, stable infiltration rate was the highest and the time that reached the stable infiltration condition was the shortest. However, when LRF was located in the lower position with different sizes, the stable infiltration rates had no significant difference. The position and size of the rock fragments had no effect on the initial infiltration rate. When LRF was located in the upper position (0-20 cm), the time for wetting front to break through LRF reduced and similarly it was the longest when LRF was located in the middle position with the particle size of 20-40 mm. When LRF was located in the lower position, the time for wetting front to reach and break through LRF reduced. Both Kostiakov infiltration formula and Philip equation were suitable for simulating the change of cumulative infiltration capacity for stony soils, but the former had better simulation results.
Number of references:21
Main heading:Infiltration
Controlled terms:Laminating - Landforms - Models - Rocks - Soil moisture - Wetting
Uncontrolled terms:Different sizes - Guangxi - Infiltration capacity - Infiltration rate - Karst areas - Rock fragments - Soil infiltration - Soil-column experiment - Vegetation rehabilitation - Water cycle  - Wetting fronts
Classification code:481.1 Geology - 483.1 Soils and Soil Mechanics - 816.1 Processing of Plastics and Other Polymers - 902.1 Engineering Graphics - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2012.08.006
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 7>

Accession number:20121915008021
Title:Reverse design and analysis of rice seedling transplanter with D-shape static trajectory
Authors:Zhao, Xiong (1); Chen, Jianneng (1); Wang, Ying (1); Zhao, Yun (1); Li, Chuanlong (2)
Author affiliation:(1) Department of Mechanical Engineering and Automation, Zhejiang Sci.-Tech. University, Hangzhou 310018, China; (2) Yuchai Heavy Industry Limited Company, Tianjin 301700, China
Corresponding author:Chen, J.(jiannengchen@zstu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:92-97
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:Through analysis on the agricultural requirement of gripper-type rice seedling transplanting, the fetching claw which forms D-trajectory could facilitate seedling gripping from rice box. To design a transplanter which can form a D-trajectory, the reverse kinematic model of the mechanism was established and the function of non-uniform velocity transmission ratio of the non-circular gears was solved based on the fitting technique of close pitch curve and the motion trajectory that met with the requirements of operation determined through the given typical points. Finally the pitch curve of the non-circular gears was achieved. A calculated example verified the feasibility of this reverse design method, and indicated that it was convenient to obtain more complicated motion regularity, realize trajectory reappearance and attitude controlling, which supplied a new method for the design of transplants.
Number of references:20
Main heading:Trajectories
Controlled terms:Attitude control - Design - Gears - Grippers - Transplants
Uncontrolled terms:Attitude controlling - D-shape - Design and analysis - Design method - Fitting techniques - Gripper-type - Kinematic model - Motion trajectories - Non-circular gears - Pitch curve  - Rice seedlings - Transmission ratios
Classification code:404.1 Military Engineering - 408 Structural Design - 462.4 Prosthetics - 601.2 Machine Components - 731.3 Specific Variables Control - 731.5 Robotics
DOI:10.3969/j.issn.1002-6819.2012.08.014
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 8>

Accession number:20121915008027
Title:Parameters identification of rational function power spectral density of pavement based on genetic algorithms
Authors:Liu, Dawei (1); Jiang, Rongchao (1); Zhu, Longlong (1); Yang, Yuedong (1)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Qingdao University, Qingdao 266071, China
Corresponding author:Liu, D.(qdldw@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:128-133
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Aiming at the parameter identification problem of power spectral density (PSD) of pavement second-order rational function, an optimization calculation model was established, in which the minimum mean-square-error of second-order rational function PSD and power function PSD given by ISO was chosen as the optimization objective. The optimum parameters of A- to D-grade pavement second-order rational function PSD were obtained by the genetic algorithms. On this basis, a road roughness model was established based on the basic principles of harmonic superposition. Then the spectrum analysis of the established road roughness model was made using auto regressive (AR) model power spectrum density estimation method. Results indicated that the pavement second-order rational function PSD was well coincidental with standard road classification power function PSD given by ISO, and the parameters of pavement second-order rational function PSD could be accurately identified using the genetic algorithms.
Number of references:16
Main heading:Rational functions
Controlled terms:Genetic algorithms - Identification (control systems) - Optimization - Parameter estimation - Pavements - Power spectral density - Spectrum analysis
Uncontrolled terms:Auto regressive models - Basic principles - Classification power - Minimum mean square errors (MMSE) - Optimization calculation - Optimum parameters - Parameter identification problems - Parameters identification - Power functions - Power spectral densities (PSD)  - Power spectrum density estimations - Road roughness - Second orders
Classification code:406.2 Roads and Streets - 731.1 Control Systems - 921 Mathematics - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2012.08.020
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 9>

Accession number:20121915008014
Title:Water and salt movement under saline water irrigation in soil with clay interlayer
Authors:Chen, Lijuan (1); Feng, Qi (1); Wang, Yu (2); Yu, Tengfei (3)
Author affiliation:(1) Cold and Arid Regions Environmental Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; (2) Lanzhou University of Technology, Lanzhou 730050, China; (3) Research School of Arid Environment and Climate Change, Lanzhou University, Lanzhou 730000, China
Corresponding author:Chen, L.(chenlj2001@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:44-51
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 existence of clay interlayer in soils had impacts on water and salt movement and distribution. In order to study water and salt movement in soils with clay interlayer irrigated by saline water, the field experiment of saline water irrigation was conducted. A corresponding model was also used to forecast the cumulating trend of soil salt. The experiment results showed that when there was clay interlayer existed in the soil, soil water and salt could be hindered evidently. In upper soil layers (0-40 cm), the content of soil water and salt increased with increasing salinity. In bottom layers (80-120 cm), however, the content of soil water and salt had less relationship with salinity of water. The maximum rate of salt accumulation in 0-70 cm soil layers was 65.7% after leaching in winter and soil salt was partly detained in upper soil layers. The salinity prediction showed that there were soil salinization trends for 4 g/L and 5 g/L treatments after irrigating continuously for 5 years. Long term irrigation with saline water of the salinity higher than 3 g/L was not feasible in soil with clay interlayer and does serious harm to soil environment seriously.
Number of references:21
Main heading:Geologic models
Controlled terms:Irrigation - Leaching - Saline water - Salinity measurement - Salts - Soil moisture
Uncontrolled terms:Bottom layers - Field experiment - HYDRUS - Soil environment - Soil layer - Soil salinization - Soil water
Classification code:444 Water Resources - 481.1 Geology - 483.1 Soils and Soil Mechanics - 533.1 Ore Treatment - 804.1 Organic Compounds - 821.3 Agricultural Methods
DOI:10.3969/j.issn.1002-6819.2012.08.007
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 10>

Accession number:20121915008023
Title:Design and experiment of Venturi variable fertilizer apparatus based on pulse width modulation
Authors:Li, Jianian (1); Hong, Tiansheng (1); Feng, Ruijue (1); Yue, Xuejun (1); Luo, Yuqing (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China; (2) Machinery Laboratory for National Citrus Industry Technology Research System, Guangzhou 510642, China; (3) Engineering College of South China Agricultural University, Guangzhou 510642, China
Corresponding author:Hong, T.(tshong@scau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:105-110
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to realize variable rate fertilization with Venturi Injector, a variable fertilizer apparatus based on PWM (pulse width modulation) technology has been developed, which consists of a pressure sensor, a venturi injector, two pulse solenoid valves and a controller. The apparatus is based on the Venturi effect with the ratio of flow in the main pipe to that in the venturi nozzle being controlled by the pressure difference. The pressure difference between inlet and outlet of Venturi Injector is controlled by controlling the pulse solenoid valve controlled using PWM technology with a duty factor, a function of the pressure difference. With the PWM duty factor changed, fertilizer concentrations can be changed. The fertilizing amount and fertilizing concentration were determined based on the inlet flow rate calibrated from the pipe inlet pressure. Experimental results showed that the optimum frequency of PWM for controlling the solenoid valve was 6 Hz and the inlet flow rate had a positive linear relationship with the inlet pressure and the correlation coefficient was 0.9936.The optimum inlet pressure range of the fertilizer apparatus was 0.15-0.25 MPa and the fertilizing concentration can be adjusted within 1.25%-9.13% by controlling the PWM duty factor of solenoid valve.
Number of references:15
Main heading:Pulse width modulation
Controlled terms:Design - Experiments - Fertilizers - Flow rate - Inlet flow - Jet pumps - Solenoid valves
Uncontrolled terms:Correlation coefficient - Inlet pressures - Linear relationships - Optimum frequency - Pressure differences - Pulse solenoids - Variable rate fertilization - Venturi - Venturi nozzles
Classification code:804 Chemical Products Generally - 716 Telecommunication; Radar, Radio and Television - 631.1 Fluid Flow, General - 901.3 Engineering Research - 631 Fluid Flow - 618.2 Pumps - 408 Structural Design - 619 Pipes, Tanks and Accessories; Plant Engineering Generally
DOI:10.3969/j.issn.1002-6819.2012.08.016
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 11>

Accession number:20121915008029
Title:Distributed metadata service system of certification resource sharing of pollution-free agricultural products
Authors:Xi, Lei (1); Zhang, Longlong (1); Zheng, Guang (1); Zhang, Hao (1); Zhang, Jianhua (1); Ding, Baohua (2); Ma, Xinming (1)
Author affiliation:(1) College of Information and Management Science, Henan Agricultural University, Zhengzhou 450002, China; (2) Agriculture Product Quality Safety Center, Ministry of Agriculture, Beijing 100081, China; (3) Agronomy College, Henan Agricultural University, Zhengzhou 450002, China
Corresponding author:Ma, X.(xinmingma@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:139-145
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 utilize and share the digital certification resources for pollution-free agricultural products, the research of the key technology for the metadata service of the certification resources was conducted in this paper, taking the wide-area scattered storage pollution-free agricultural products digital resources as the investigated subject and transparent access to the certification resources. Through the feature analysis of completeness and relevance of the certification resources, the multi-level model of the certification resource set was proposed to conduct the organization and division of the resources. On the basis of the certification resources organization and the relations revelation between the resources, the metadata standards were designed and the certification resources metadata frame model was presented in this paper. Based on resource allocation and management and service support, the hierarchy of the certification resources and the functional structure of the sharing service was levelly sliced and distributed in the sharing service network composed of the center domain and resource domain to construct the certification resources sharing service system structure. Moreover, the core technologies such as the metadata distributed storage, metadata request and so on also were discussed in this paper. Finally, a virtual certification resources database integrated by the wide-area scattered certification resources through the certification resources sharing service was established to provide the unified resources logical view to the service objects such as consumers, enterprises, functional technology departments, governments and achieved the transparent resources access. This research also provides the technical support for the transition of the certification work from the evaluation of conformity to the market supervision of the agricultural products quality safety and has good prospects of application and promotion.
Number of references:23
Main heading:Distributed database systems
Controlled terms:Agricultural products - Metadata - Pollution - Web services
Uncontrolled terms:Core technology - Digital resources - Distributed metadata - Distributed storage - Feature analysis - Frame models - Functional structure - Key technologies - Metadata services - Metadata Standards  - Multilevel model - Pollution-free - Products quality - Resource allocation and management - Resource domains - Resource sharing - Resources sharing - Service network - Service objects - Service support  - Service systems - Technical support - Transparent access - Wide area
Classification code:454.2 Environmental Impact and Protection - 723 Computer Software, Data Handling and Applications - 723.3 Database Systems - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2012.08.022
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 12>

Accession number:20121915008017
Title:Effects of different drip irrigation threshold on water use and biomass of soilless culture anthurium in greenhouse
Authors:Ma, Fusheng (1); Liu, Honglu (1); Wu, Wenyong (1); Yang, Shengli (1)
Author affiliation:(1) Beijing Hydraulic Research Institute, Beijing 100044, China; (2) Beijing Eng. Tech. Res. Ctr. for Explor. and Utiliz. of Non-Conventional Water Rsrc., Beijing 100044, China
Corresponding author:Ma, F.(mafusheng88@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:65-70
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore appropriate irrigation mode of soilless culture anthurim, effect of drip irrigation with different irrigation threshold on water use and biomass of soilless culture anthurim in multi-span greenhouse were investigated. The experimental anthurium was planted in plastic pot with substrate. The low irrigation threshold was designed based on the proportion of irrigating substrate moisture content with the substrate moisture capacity(&theta;<inf>FC</inf>), and treatments included 90%&theta;<inf>FC</inf>(T1), 80%&theta;<inf>FC</inf>(T2), 70%&theta;<inf>FC</inf>(T3), 60%&theta;<inf>FC</inf>(T4) and 50%&theta;<inf>FC</inf>(T5). Results showed that the irrigation water use efficiency was only 0.4 to 0.5 under experiment condition. The substrate moisture content and irrigation water use efficiency decreased with low irrigation threshold reduction, but the irrigation cycle increased reversely. Compared with T1, the flower size and quantity of T4 were similar, but the plant height and crown diameter were larger than T1 significantly, the plant height increased 19.3% and the crown diameter increased 14.7%. T2 and T3 had no obvious influence on anthurium's flower and biomass compared with T1, but T5 reduced the flower size. Water consumption amount of one pot anthrium was about 2522 g to 2986 g during experiment. Compared with T1, water consumption amount of T2, T3, T4 and T5 decreased 4% to 16%. Lower water consumption amount and better flower quality were got from the treatment with low irrigation threshold of 60%&theta;<inf>FC</inf>, so 60%&theta;<inf>FC</inf> was appropriate low irrigation threshold for experimental anthurim.
Number of references:22
Main heading:Subirrigation
Controlled terms:Biomass - Experiments - Greenhouse effect - Greenhouses - Moisture - Moisture determination - Substrates - Water supply
Uncontrolled terms:Anthurium - Crown diameter - Drip irrigation - Experiment condition - Flower quality - Flower size - Irrigation cycles - Irrigation water use efficiency - Moisture capacity - Multi-spans  - One pot - Plant height - Soil-less culture - Substrate moisture contents - Threshold reduction - Water consumption - Water use
Classification code:901.3 Engineering Research - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 801.4 Physical Chemistry - 944.2 Moisture Measurements - 801 Chemistry - 451 Air Pollution - 446.1 Water Supply Systems - 461 Bioengineering and Biology
DOI:10.3969/j.issn.1002-6819.2012.08.010
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 13>

Accession number:20121915008045
Title:Experiment on microalgae cultivation in BG11 nutrient solution adding biogas slurry
Authors:Huo, Shuhao (1); Chen, Yubi (1); Liu, Yupeng (2); Zhu, Yi (3); Peng, Gaojun (2); Dong, Renjie (1)
Author affiliation:(1) Energy Engineering and Low Carbon Technology Laboratory, College of Engineering, China Agriculture University, Beijing 100083, China; (2) College of Water Resources and Civil Engineering, China Agriculture University, Beijing 100083, China; (3) College of Food Science and Nutritional Engineering, China Agriculture University, Beijing 100083, China
Corresponding author:Dong, R.(rjdong@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:241-246
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The way of using biogas slurry to cultivate energy microalgae is favorable to wastewater disposal and can lower the cost of the algae production effectively. 7 strains of microalgae S496, 1067, 1069, C31, Y7, Y3 and W were added to be mixed with nutrient solution (volume ratio of biogas slurry and BG11 was 1:9), and then changes of the growth rate, pH value and nutrients of nutrient solution were studied in this paper. The results showed that all other 6 trains could adapt to culture solutions immediately and came into logarithm growth phase expect Y7. Under the conditions of unregulated medium pH value, pH value of these culture solutions all decreased from 9.20-9.32 to 8.73-9.09 in the first 2-4 days and then started to rise. When pH value declined, growth rate of microalgae increased constantly. When algae were cultivated after 12 days, the final concentrations of algae in culture medium were between 0.310-0.607 g/L. During culture process, the concentrations of NH<inf>4</inf>-N, Mg, SO<inf>4</inf>^2-, Mn, F^- and Fe all dropped significantly; NH<inf>4</inf>-N?Mn?Fe were fully absorbed; Mg² dropped 11.47%-87.73%; SO<inf>4</inf>^2-dropped 37.30%-62.70%; F^- dropped 18.18%-54.55%. This research provides scientific basis for cultivating microalgae in mixing biogas slurry.
Number of references:19
Main heading:Nutrients
Controlled terms:Algae - Biogas - Growth rate - Manganese - Microorganisms - pH - Wastewater disposal
Uncontrolled terms:Biogas slurry - Culture medium - Culture solution - Growth phase - Micro-algae - Microalgae cultivation - Nutrient solution - pH value - Volume ratio
Classification code:821.2 Agricultural Chemicals - 801.2 Biochemistry - 801.1 Chemistry, General - 933.1.2 Crystal Growth - 543.2 Manganese and Alloys - 461.2 Biological Materials and Tissue Engineering - 452.4 Industrial Wastes Treatment and Disposal - 522 Gas Fuels
DOI:10.3969/j.issn.1002-6819.2012.08.038
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 14>

Accession number:20121915008028
Title:Experiment research on effect of different additives on degradation process of engine lubricating oil in soil
Authors:Li, Guanfeng (1); Zhang, Lei (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
Corresponding author:Li, G.(li-guanfeng@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:134-138
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 seek out ways to rapidly degrade the engine lubricating oil in the soil, the experiment on effect of different soil additives on degeneration process for engine lubricating oil were conducted in laboratory by the soil experimental method. The general soil was mixed with 5% engine lubricating oil to simulate the conditions of polluted soil. The test sample were divided into A B C and D group by different treatment way: A group was simple soil, which did not mixed up with engine lubricating oil and anything else; B group was the admixture of oil and soil, that was called oil soil, which was mixed up with 5% engine lubricating oil in the soil; C group was the admixture of oil soil, urea and calcium phosphate monobasic, which was commixed 12 g urea and 8 g calcium phosphate monobasic in the oil soil; D group was the admixture of oil soil, urea, calcium phosphate monobasic, and bacterium liquid, which was commixed 4 mL bacterium liquid in test sample C. Then, the experiment specimen soil was laid in the same condition, and the amount of degradation was measured timely to get the relationship of the degradation with the time. Results showed that degeneration rate of the engine lubricating oil in the test sample C was 10.6% after 36 days and improved by 35.9% compared with B; the degeneration rate of the test sample D was 13.9% after 27 days, and improved by 77.2% compared with B, and also improved by 31.1% with C. Generally, adding some urea, calcium phosphate monobasic, and suitable bacterium into the oil soil was advantageous in speeding up the degeneration of the engine lubricating oil, but the degeneration rate was little and limited in a given period. This research offers a way for degrading engine lubricating oil rapidly in soil.
Number of references:23
Main heading:Soils
Controlled terms:Additives - Bacteria - Calcium phosphate - Degradation - Engines - Experiments - Liquids - Lubricating oils - Metabolism - Soil pollution  - Urea
Uncontrolled terms:Degradation process - Degradation rate - Experiment research - Experimental methods - Oil soils - Polluted soils - Test samples
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 901.3 Engineering Research - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.2 Chemical Reactions - 612 Engines - 607.1 Lubricants - 483.1 Soils and Soil Mechanics - 461.9 Biology
DOI:10.3969/j.issn.1002-6819.2012.08.021
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 15>

Accession number:20121915008036
Title:Analysis on drought risk of maize based on natural disaster system theory in Liaoning province
Authors:Shan, Kun (1); Liu, Buchun (1); Liu, Yuan (1); Yang, Xiaojuan (1); Le, Zhangyan (2); Wang, Jian (1)
Author affiliation:(1) Key Lab. of Agro-Environment and Climate Change/Key Lab. of Dry Agricultural, Min. of Agriculture, Institute of Environment and Sustainable Development of Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (2) Langfang Meteorological Bureau, Langfang 065000, China
Corresponding author:Liu, B.(liubc68@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:186-194
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:In order to reduce the effect of drought on maize production, taking Liaoning province as the study area, maize drought risk index was built by 4 factors, including the actual drought occurred frequency, the agro-meteorological drought occurred frequency, the maize relative exposure rate and maize production per unit area based on the 46 years daily meteorological data, as well as the yield and cultivated area of maize at 23 meteorological sites. Using the SPSS(statistical program for social sciences)and GIS(geographic information system), the maize drought risk zone was analyzed on the basis of the maize drought risk index in Liaoning province. The results showed that 30% of the meteorological sites were in high-risk areas and mainly distributed in western Liaoning hilly and coastal areas in southern Liaoning; the drought medium-risk zone was mainly distributed in western corridor, Liaozhong plain and vicinity of Bohai bay; the drought low-risk zone was distributed in Liaodong mountainous areas. And then, the relationship between drought risk index and maize yield at more than 50% of the sites were significantly correlated. The index of maize drought risk constructed in this paper objectively reflected the effects of drought on maize production. This study provides a scientific foundation for maize disaster prevention and disaster management.
Number of references:32
Main heading:Drought
Controlled terms:Coastal zones - Disaster prevention - Disasters - Geographic information systems - Meteorology - Risk assessment
Uncontrolled terms:Area-based - Bohai Bay - Coastal area - Disaster management - Exposure rate - GIS (geographic information system) - High-risk areas - Liaoning Province - Maize - Maize production  - Maize yield - Meteorological data - Meteorological sites - Mountainous area - Natural disasters - Per unit - Risk indices - Risk zones - Risk zoning - Study areas
Classification code:443 Meteorology - 444 Water Resources - 471 Marine Science and Oceanography - 723.3 Database Systems - 914.1 Accidents and Accident Prevention
DOI:10.3969/j.issn.1002-6819.2012.08.029
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 16>

Accession number:20121915008033
Title:Modeling method of corn ears based on particles agglomerate
Authors:Yu, Yajun (1); Zhou, Hailing (1); Fu, Hong (2); Wu, Xuanchen (1); Yu, Jianqun (1)
Author affiliation:(1) School of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China; (2) College of Computer Science and Technology, Jilin University, Changchun 130012, China
Corresponding author:Yu, J.(yujianqun@jlu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:167-174
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:It is necessary to establish the analysis models of corn ears to analyze corn threshing process using DEM (the Discrete Element Method). According to the shapes and the structure of corn ears, a method for establishing analysis models of corn ears based on particles agglomerate was proposed and the corn ears modeling software was developed, which was added to the corn threshing simulation software developed by our group. By comparing the corn ears' entities with the analysis models and the simulation analysis of corn threshing process, the feasibility of the new method was validated. This paper provides reference for analyzing corn threshing process used by DEM.
Number of references:16
Main heading:Computer simulation
Controlled terms:Agriculture - Finite difference method - Models - Software testing
Uncontrolled terms:Analysis models - Corn ear - Corn threshing - Modeling softwares - Simulation analysis - Simulation software - Threshing process
Classification code:723.5 Computer Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 902.1 Engineering Graphics - 921.6 Numerical Methods
DOI:10.3969/j.issn.1002-6819.2012.08.026
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 17>

Accession number:20121915008010
Title:Influencing factors analysis of reference crop evapotranspiration and modification of Hargreaves method in Manas river basin
Authors:Fan, Wenbo (1); Wu, Pute (1); Han, Zhiquan (3); Yao, Bin (3)
Author affiliation:(1) College of Water Resources and Architecture Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) College of Water Resources and Architecture Engineering, Shihezi University, Shihezi 832003, China; (3) College of Science, Shihezi University, Shihezi 832003, China
Corresponding author:Wu, P.(gjzwpt@vip.sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
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:Accurate estimation of reference crop evapotranspiration(ET<inf>0</inf>) is essential to water resources planning and farm irrigation scheduling. Based on the meteorological data from 1953 to 2008, ET<inf>0</inf> in Manas river basin (a typical inland river in Xinjiang province) was calculated by Penman-Monteith method (PM), and the meteorological factors affecting ET<inf>0</inf> was analyzed by the path analysis. The results showed that temperature was the main factor affecting ET<inf>0</inf>. Assuming the ET<inf>0 </inf>calculated by PM as the standard value, values of monthly ET<inf>0</inf> calculated by Hargreaves method were higher, especially from April to October per year. Based on meteorological data of 35 years, the Hargreaves method was modified by the Bayesian method, and was validated with the meteorological data of the other time series of 21 years. Results indicated that the accuracy of the modified Hargreaves method in calculating ET<inf>0</inf> was greatly improved. The modified Hargreaves method that is simpler than PM method can be used to calculate ET<inf>0</inf> in other inland river areas.
Number of references:21
Main heading:Factor analysis
Controlled terms:Bayesian networks - Crops - Evapotranspiration - Meteorology - Regression analysis - Rivers - Temperature - Water supply - Watersheds
Uncontrolled terms:Accurate estimation - Bayesian methods - Crop evapotranspiration - Hargreaves - Influencing factors analysis - Inland rivers - Irrigation scheduling - Meteorological data - Meteorological factors - Path analysis  - Penman-Monteith method - River basins - Standard values - Water resources planning - Xinjiang
Classification code:922.2 Mathematical Statistics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 821.4 Agricultural Products - 641.1 Thermodynamics - 446.1 Water Supply Systems - 444.1 Surface Water - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2012.08.003
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 18>

Accession number:20121915008048
Title:Isotope analysis of lead pollution sources in wheat kernel
Authors:Zhao, Duoyong (1); Wei, Yimin (1); Wei, Shuai (1); Guo, Boli (1); Cai, Xianfeng (1); Wu, Xiaosheng (1)
Author affiliation:(1) Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
Corresponding author:Wei, Y.(weiyimin36@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:258-262
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To identify and apportion the contributions of lead pollution sources in wheat kernel, the surrounding area of a lead-zinc smelter in northwestern China was taken as the study area, local atmospheric deposits, tilled soils (0-20 cm), and the corresponding wheat samples were collected and then lead concentrations and isotope ratios was analyzed by ICP-MS. The spatial distribution of atmospheric lead settlement fluxes as well as lead concentrations in soil and wheat kernel were predicted by Ordinary Krigging methods. The contributions of lead pollution sources to wheat kernel were calculated with a linear mixing model. The results showed that lead concentrations in tilled soil ranged from 21.8 to 40.0 mg/kg, and the average level (27.1 mg/kg) was higher than background value (21.4 mg/kg) of local soil samples, which indicated that the soil in local area was polluted slightly. The lead concentrations of wheat kernel in the canyon ranged 0.269-0.768 mg/kg, of which the average level was 0.430 mg/kg, and 100% of the wheat samples exceeded the maximum level in GB2762-2005. The contributions of atmospheric deposits and tilled soil to lead concentrations in wheat kernel were 90%-99% and 1%-10%, respectively. The paper provided scientific basis for making policy on heavy metal contamination control and food safety production system.
Number of references:22
Main heading:Soil pollution
Controlled terms:Deposits - Grain (agricultural product) - Isotopes - Lead - Lead zinc deposits - Soils
Uncontrolled terms:Atmospheric deposits - Atmospheric lead - Background value - Heavy metal contamination - Isotope analysis - Isotope ratio - Lead concentration - Lead pollution - Linear mixing models - Northwestern China  - Safety production - Soil sample - Study areas - Tilled soils - Wheat kernels
Classification code:804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 617 Turbines and Steam Turbines - 821.4 Agricultural Products - 612 Engines - 532 Metallurgical Furnaces - 483.1 Soils and Soil Mechanics - 546.1 Lead and Alloys
DOI:10.3969/j.issn.1002-6819.2012.08.041
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 19>

Accession number:20121915008016
Title:Coupling effect of water and nitrogen on cucumber root growth in solar greenhouse
Authors:Gao, Li (1); Li, Hongling (2); Wang, Tiechen (2); Kong, Xiangyue (1); Zhang, Zhenxian (1); Gao, Lihong (1)
Author affiliation:(1) Department of Vegetable Science, China Agriculture University, Beijing 100193, China; (2) Beijing Extending Station for Agricultural Technology, Beijing 100101, China
Corresponding author:Gao, L.(gaolh@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:58-64
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To explore the promoting root mechanism of coupling of water and nitrogen, taking root growth of winter-spring cucumber and autumn-winter cucumber in solar greenhouse as a research object, the principle component analysis method was used to evaluate the root growth, the relationship between NO<inf>3</inf>^--N content in different soils depth and distribution of root length density of root system in soil in effective root diameter was studied. The results showed that quality principle component could represent 97.27% primordial root information; the water management (irrigation quota was 300 m³/hm² with irrigation scheduling of eight times for the winter-spring cucumber and five times for the autumn-winter cucumber) and suitable nitrogen application (240 kg/hm² for the winter-spring cucumber and 50 kg/hm² for the autumn-winter cucumber) situation could keep the soil NO<inf>3</inf>^--N content in root zone appropriate for cucumber growth, increase yield of cucumber and reduce the wasting of water and nitrogen fertilizer, which the coupling mode of applying water and nitrogen with high quality and efficiency.
Number of references:22
Main heading:Nitrogen
Controlled terms:Greenhouses - Irrigation - Nitrogen fertilizers - Plants (botany) - Principal component analysis - Soils - Solar heating - Water management
Uncontrolled terms:Coupling effect - Coupling mode - Cucumber - Cucumber roots - High quality - Irrigation quotas - Irrigation scheduling - N content - Principle component - Principle component analysis  - Research object - Root diameters - Root growth - Root length density - Root system - Root zone - Solar greenhouse
Classification code:922.2 Mathematical Statistics - 821.6 Farm Buildings and Other Structures - 821.3 Agricultural Methods - 804 Chemical Products Generally - 643.1 Space Heating - 483.1 Soils and Soil Mechanics - 461.9 Biology - 446 Waterworks - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2012.08.009
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 20>

Accession number:20121915008050
Title:A slantwise rectification method of stored-grain pests image based on Hotelling transform
Authors:Lu, Jun (1); Chen, Jianjun (1); Wu, Pengfei (1); Tan, Zuojun (1)
Author affiliation:(1) College of Science, Huazhong Agriculture University, Wuhan 430070, China
Corresponding author:Lu, J.(lujun5918@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:269-274
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to the feature that images of stored-grain pests have no obvious lines, a new rectification algorithm based on Hotelling transform about the area and edge of pests was presented. Firstly, the minimum exterior rectangle was gotten through automatic searching, and image binarization was made with adaptive threshold. Then the coordinates of the region and edge of pests within the rectangle were drawn out, and eigenvectors of covariance matrix were calculated and thus the Hotelling transform matrix was constituted. The images of original slantwise pests were rectified by the matrix of Hotelling Transform. Experimental results show that the new method can rectify images of the stored-grain pests efficiently and accurately with high noise endurance and application adaptability.
Number of references:20
Main heading:Edge detection
Controlled terms:Algorithms - Computer vision - Covariance matrix - Image processing - Principal component analysis
Uncontrolled terms:Adaptive thresholds - Edge transforms - High noise - Hotelling transform - Image binarization - Slantwise rectification - Stored-grain pests
Classification code:922 Statistical Methods - 921 Mathematics - 741.2 Vision - 922.2 Mathematical Statistics - 741 Light, Optics and Optical Devices - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television - 723.5 Computer Applications
DOI:10.3969/j.issn.1002-6819.2012.08.043
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 21>

Accession number:20121915008035
Title:Non-destructive detection of plant roots based on magnetic resonance imaging technology
Authors:Zhang, Jianfeng (1); Wu, Di (1); Gong, Xiangyang (3); He, Yong (1); Liu, Fei (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; (2) Biosystems Engineering, University College Dublin-National University of Ireland, Belfield, Dublin 4, Ireland; (3) Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China
Corresponding author:He, Y.(yhe@zju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:181-185
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:Three-dimensional (3-D) root architecture plays an important role in the nutrition absorption for crops. Taking the roots of corn, soybean, and eggplant as study objects, magnetic resonance imaging technology (MRI) technique was used to acquire 3-D architectures of these roots in situ. Various factors affecting the process of MRI were discussed, such as growth medium, root type, and three-dimensional reconstruction methods. Advantages and disadvantages of MRI as a rapid and non-invasive technique for the root architecture research were also discussed. The results show the feasibility of applying MRI technique for the acquisition of 3-D root architectures of crops. This study will be helpful for the further quantitative description and analysis of 3-D root architecture of crops using MRI technique.
Number of references:16
Main heading:Three dimensional
Controlled terms:Crops - Magnetic resonance imaging - Nondestructive examination - Three dimensional computer graphics
Uncontrolled terms:3D architectures - Growth medium - In-situ - Nondestructive detection - Noninvasive technique - Plant roots - Quantitative description - Root architecture - Three-dimensional reconstruction - Threedimensional (3-d)
Classification code:421 Strength of Building Materials; Mechanical Properties - 723.5 Computer Applications - 746 Imaging Techniques - 821.4 Agricultural Products - 902.1 Engineering Graphics
DOI:10.3969/j.issn.1002-6819.2012.08.028
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 22>

Accession number:20121915008015
Title:Cotton salt tolerance appraisal indices and eigenvalue under border irrigation with saline water
Authors:Feng, Di (1); Zhang, Junpeng (1); Sun, Jingsheng (1); Zheng, Chunlian (2); Cao, Caiyun (2); Li, Kejiang (2); Liu, Zugui (1)
Author affiliation:(1) Key Laboratory for Crop Water Requirement and Regulation of the Ministry of Agriculture, Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China; (2) Institute of Dryland Farming, Hebei Academy of Agriculture and Forestry Sciences, Hengshui 053000, China
Corresponding author:Sun, J.(jshsun623@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:52-57
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to use the mineralized shallow groundwater to relieve the crisis of freshwater resources shortage, the 5 years field experiment under border irrigation with mineralized water before sowing was conducted. The response relations among different salt stress levels and cotton growth index and seed cotton yield were analyzed in this study, and the cotton salt tolerance appraisal indices and eigenvalue under border irrigation with different saline water before sowing were put forward. The results showed that the relative emergency rate, relative plant height, relative leaf area, relative above-ground dry matter mass, relative fruit branch number, relative boll number and relative maximum of buds, flowers and bolls all could be used as salt tolerance appraisal indices of cotton. The relative height was recommended as the most practical salt tolerance appraisal index among them because it was easy to observation and sensitive to salt stress. The salinity of irrigation water should be below 5.48 g/L when the yield of seed cotton in saline water treatment was consistent with the fresh water irrigation treatment after a 5- year continuous irrigation.
Number of references:15
Main heading:Eigenvalues and eigenfunctions
Controlled terms:Cotton - Groundwater - Groundwater resources - Hardwoods - Irrigation - Saline water - Water supply
Uncontrolled terms:Border irrigation - Branch number - Cotton growth - Dry matters - Eigen-value - Field experiment - Fresh Water - Fresh water resources - Irrigation treatments - Irrigation waters  - Leaf area - Mineralized water - Plant height - Relative heights - Salt stresss - Salt tolerance - Seed cotton - Shallow groundwater
Classification code:444 Water Resources - 444.2 Groundwater - 446.1 Water Supply Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921.1 Algebra
DOI:10.3969/j.issn.1002-6819.2012.08.008
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 23>

Accession number:20121915008025
Title:Development of surface roughness tester based on laser triangulation method
Authors:Li, Xiaojie (1); Zhao, Kai (1); Zheng, Xingming (1)
Author affiliation:(1) Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China; (2) Changchun Jingyue Remote State, Changchun 130012, China
Corresponding author:Zhao, K.(zhaokai@neigae.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:116-121
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 problems of manual intervention and long testing time existed in using contact method to test surface roughness, a fast testing method and an instrument for surface roughness were proposed. Base on laser triangle principle, laser was projected onto the testing object and the image of reflected light was received by camera, and the 3D coordinate of measurement area through the image processing algorithms and coordinate transformation was obtained, and then the parameter results of the earth's roughness were obtained on the basis of the roughness computing formula. Also, field experiments and precision experiment were conducted with this instrument. The maximum of average comparative error for measurement result was 2.93% through precision experiment. The instrument's typical resolution level was 0.78, 1 and 0.83 mm, in the scanning's vertical direction, in the scanning and in the earth's vertical direction, respectively. The experimental results showed that the spatial autocorrelation coefficient of soil surface can express row structural characteristic of furrowed soil, which verified the feasibility and availability of the instruments and methods proposed in this paper.
Number of references:21
Main heading:Instrument testing
Controlled terms:Experiments - Instruments - Scanning - Surface roughness - Three dimensional
Uncontrolled terms:3D coordinates - Co-ordinate transformation - Computing formula - Contact methods - Correlation lengths - Field experiment - Image processing algorithm - Laser triangulation method - Manual intervention - Measurement results  - Reflected light - Resolution level - Soil surfaces - Spatial autocorrelations - Structural characteristics - Testing method - Testing time - Vertical direction
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 931.2 Physical Properties of Gases, Liquids and Solids - 901.3 Engineering Research - 741.3 Optical Devices and Systems - 902.1 Engineering Graphics
DOI:10.3969/j.issn.1002-6819.2012.08.018
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 24>

Accession number:20121915008043
Title:Potential assessment on biogas production by using livestock manure of large-scale farm in China
Authors:Tian, Yishui (1)
Author affiliation:(1) Chinese Academy of Agriculture Engineering, Beijing 100125, China
Corresponding author:Tian, Y.(yishuit@yahoo.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:230-234
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 determine the discharge of livestock poultry, the productive potentials of biogas and the distribution of scale farms in China, this paper used the statistical data of 2009 to establish the estimation of annually discharge of livestock poultry and parameters of estimation in China, and estimated main annually discharge of livestock poultry, the productive potentials of biogas and the reduction potentials of greenhouse gases. The result showed that the total manure emission of the large-scale farm was 837 million tons in 2009, annual biogas production potential is about 47.21 billion m³ and the reduction potential is 190 million tons CO<inf>2</inf>. Pigs, cows and beef cattle farming are the main manure sources in China, and manure emission mainly distribute in north-east area, north area and north-west area. The results can provide basis for decision making to control pollution of the large-scale farm.
Number of references:32
Main heading:Farms
Controlled terms:Biogas - Carbon dioxide - Greenhouse gases - Manures - Pollution control
Uncontrolled terms:Beef cattle - Biogas production - Large-scale - Livestock manure - Manure sources - Reduction potential - Resource assessments - Statistical datas
Classification code:454.2 Environmental Impact and Protection - 522 Gas Fuels - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes
DOI:10.3969/j.issn.1002-6819.2012.08.036
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 25>

Accession number:20121915008047
Title:Experiment on reforming of CH<inf>4</inf> with CO<inf>2</inf> by biomass char under microwave irradiation
Authors:Li, Longzhi (1); Song, Zhanlong (1); Zhao, Xiqiang (1); Ma, Chunyuan (1)
Author affiliation:(1) National Engineering Laboratory for Coal Combustion Pollutants Reduction, Shandong University, Jinan 250061, China; (2) Shandong Provincial Key Lab. of Energy Carbon Reduction and Resource Utilization, Ji'nan 250061, China
Corresponding author:Ma, C.(lilongzhi630@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:252-257
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 develop a method which can convert CH<inf>4</inf> and CO<inf>2</inf> obtained from biomass pyrolysis into syngas production, the reforming of CH<inf>4</inf> with CO<inf>2</inf> by a biomass char was conducted with microwave heating in this paper. The influences of particle diameter, microwave power, the molar ratio of CO<inf>2</inf> and CH<inf>4</inf> as well as the volumetric hourly space velocity on the CH<inf>4</inf> and CO<inf>2</inf> conversions were investigated, and the behaviors of CH<inf>4</inf> decomposition, the reforming of CH<inf>4</inf> with CO<inf>2</inf> and CO<inf>2</inf> gasification reaction were studied. The results indicate that reactant gases conversions are found to be almost unchanged when the particle diameter is below 0.83 mm. And increasing microwave power, enhancing the molar ratio of CO<inf>2</inf> and CH<inf>4</inf> or reducing the volumetric hourly space velocity result in an increase in the reactant gas conversions. In the reforming reaction, higher conversions of CH<inf>4</inf> and CO<inf>2</inf> can be obtained at the beginning, and then the CO<inf>2</inf> conversion is decreased slightly, together with a sustained decrease in the CH<inf>4</inf> conversion. Compared to the reforming reaction, more significant decrease in the CH<inf>4</inf> conversion is observed in the CH<inf>4 </inf>decomposition reaction. The initial CO<inf>2</inf> conversion in the gasification reaction is higher than that in the reforming reaction, and then it is lower than that in the reforming reaction after 60 min. The results indicate that biomass char has a good catalytic effect on the reforming of CH<inf>4 </inf>with CO<inf>2</inf> under microwave irradiation.
Number of references:21
Main heading:Carbon dioxide
Controlled terms:Biomass - Catalysts - Catalytic reforming - Gasification - Microwave generation - Microwave irradiation - Microwave power transmission - Particle size - Reforming reactions - Synthesis gas
Uncontrolled terms:Biomass char - Biomass pyrolysis - Catalytic effects - Decomposition reaction - Gasification reaction - Microwave power - Molar ratio - Particle diameters - Reactant gas - Space velocities  - Syngas production
Classification code:943.2 Mechanical Variables Measurements - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 802.2 Chemical Reactions - 714.2 Semiconductor Devices and Integrated Circuits - 711 Electromagnetic Waves - 706.1.1 Electric Power Transmission - 525.1 Energy Resources and Renewable Energy Issues - 522 Gas Fuels
DOI:10.3969/j.issn.1002-6819.2012.08.040
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 26>

Accession number:20121915008031
Title:Application prospects of organic RFID tags for animal food tracing
Authors:Zhao, Qiuyan (1); Wang, Yang (2); Qiao, Mingwu (1); Song, Lianjun (1)
Author affiliation:(1) College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (2) Institute of Information Engineering, Information Engineering University of People's Liberation Army, Zhengzhou 450002, China
Corresponding author:Song, L.(slj69@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:154-158
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 high cost of radio frequency identification (RFID) tags has restricted the wider application of RFID technology. Organic radio frequency identification tags have gained considerable attention because of their low cost processing. The characteristic of organic RFID tags was analyzed in this paper. The differences of the traditional barcode, RFID and organic RFID tags were compared. Characteristics of main steps of the traceability processing of animal food, needs of traceability technology and application of the three tags were analyzed. The results showed organic RFID will be help for reducing cost and promote the animal food traceability technology.
Number of references:26
Main heading:Radio frequency identification (RFID)
Controlled terms:Animals - Food products - Labels - Organic compounds - Radio navigation - Surface discharges
Uncontrolled terms:Animal foods - Application prospect - High costs - Low costs - Radiofrequency identification tags - Reducing costs - RF-ID tags - RFID Technology
Classification code:822 Food Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 814 Leather and Tanning - 804.1 Organic Compounds - 822.3 Food Products - 716.3 Radio Systems and Equipment - 694.2 Packaging Materials - 471 Marine Science and Oceanography - 461 Bioengineering and Biology - 701.1 Electricity: Basic Concepts and Phenomena
DOI:10.3969/j.issn.1002-6819.2012.08.024
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 27>

Accession number:20121915008049
Title:Detection of live Sitophilus oryzae (L.) in stored wheat by near-infrared hyperspectral imaging
Authors:Zhang, Hongtao (1); Mao, Hanping (2); Han, L&#252;hua (2)
Author affiliation:(1) Institute of Electric Power, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China; (2) Key Laboratory of Modern Agricultural Equipment and Technology, Min. of Edu. and Jiangsu Province, Zhenjiang 212013, China
Corresponding author:Mao, H.(maohp@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:263-268
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:It is necessary to distinguish between the live and the dead insects effectively for counting the density of the storage insects accurately. A 900-1700 nm near-infrared hyperspectral imaging system was developed to detect live insects in stored wheat. The Sitophilus oryzae was killed by using low-temperature sudden death method with liquid nitrogen, and then the hyperspectral images were acquired over the period of time 0-7 day after the death of insects. The relative spectral reflectance of the insects increased gradually with the duration of the death time. Then the spectral curve of the insects became stable on the fifth day after the death. 110 hyperspectral images whose wavelength was from 1320 to 1680 nm were analyzed by the neighbor wavelength index, and the optimal characteristic wavelength to distinguish the live and the dead was 1417.2 nm. The region-growing method for identifying the live insects was proposed based on the area ratio of the two thresholds for connecting regions. And the insect should be judged to be alive if the area ratio was higher than 0.5. The results showed that the training samples and the testing samples of the live and the dead insects were all correctly identified since the second day after the death. This research provides a basis for the real-time detection and classification of stored-gain live insects based on computer vision technology.
Number of references:17
Main heading:Computer vision
Controlled terms:Error detection - Image processing - Infrared devices - Liquid nitrogen
Uncontrolled terms:Area ratios - Computer vision technology - Hyper-spectral images - Hyperspectral Imaging - Low temperatures - Near-infrared hyperspectral imaging - Real-time detection - Region growing - Sitophilus oryzae - Spectral curves  - Spectral reflectances - Stored-grain insects - Sudden deaths - Testing samples - Training sample - Wavelength index
Classification code:721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 741 Light, Optics and Optical Devices - 804.2 Inorganic Compounds
DOI:10.3969/j.issn.1002-6819.2012.08.042
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 28>

Accession number:20121915008038
Title:Model and zoning of forest fire risk in Heilongjiang province based on spatial Logistic
Authors:Deng, Ou (1); Li, Yiqiu (2); Feng, Zhongke (1); Zhang, Dongyou (4)
Author affiliation:(1) Institute of Geomatics and Geographic Information System, Remote Sensing and Global Positioning System, Beijing Forestry University, Beijing 100083, China; (2) Department of Resource and Environment, Mianyang Normal University, Mianyang 621000, China; (3) Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; (4) Department of Life and Environment, Harbin Normal University, Harbin 150000, China
Corresponding author:Feng, Z.(fengzhongke@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:200-205
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Forest fire risk analysis and forest fire risk zoning are important parts of the forest fire management. MODIS burn scars of remote sensing data sets MCD45A1 of Heilongjiang Province in 2000-2010 was used to build the spatial logistic forest fire risk model based on the spatial distribution of forest fire and forest fire impact factor by using geographic information system technology. Forest fire risk zoning study was conducted in a larger temporal scale and provincial spatial scale. Logistic model of forest fire risk built by spatial sampling between the distribution of forest fires and forest fire impact factor fit well (p&lt;0.05). The relative operating characteristic value was 0.753 and the probability distribution map of forest fire was gotten by layer computing. Forest fire area of Heilongjiang province was divided into none, low, moderate, high, and extremely high fire risk zones. Extremely high and high fire risk zone were located at Great Xing'an Mountain, while high or moderate fire risk area at Xiaoxing'an Mountain basically. Small parts of the eastern mountain were in moderate fire risk, and other areas in low or none fire risk. Quantitative and positioning evaluation of the forest fire in Heilongjiang province provides scientific basis for the prevention of forest fire fighting and rescue work.
Number of references:25
Main heading:Fires
Controlled terms:Deforestation - Geographic information systems - Landforms - Logistics - Probability distributions - Remote sensing - Risk assessment - Risks - Zoning
Uncontrolled terms:Burn scar - Fire risk zones - Fire risks - Forest fire management - Forest fires - Heilongjiang province - Impact factor - Logistic models - Relative operating characteristics - Remote sensing data  - Spatial sampling - Spatial scale - Temporal scale
Classification code:922.1 Probability Theory - 914.2 Fires and Fire Protection - 913 Production Planning and Control; Manufacturing - 912 Industrial Engineering and Management - 821.0 Woodlands and Forestry - 731.1 Control Systems - 723.3 Database Systems - 481.1 Geology - 403.2 Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2012.08.031
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 29>

Accession number:20121915008032
Title:Support system for wheat production management based on service-oriented architecture and WebGIS
Authors:Jiang, Haiyan (1); Mao, Jinhui (1); Xu, Xiaoming (1); Fu, Bing (2); Cao, Weixing (2); Zhu, Yan (2)
Author affiliation:(1) College of Information Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; (2) National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Zhu, Y.(yanzhu@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:159-166
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:There are a great number of problems with the integration process between crop models and GIS, such as duplicated function development, model sharing difficulty, and limited geographic processing online integration capabilities, etc. Web service composition framework for regional applications of crop models based on service-oriented architecture(SOA) was designed in this paper. The development process, interface design and implementation method about model computing web services, dynamic thematic map web services and spatial interpolation web services were illustrated by using ArcGIS Service and Model Builder as development platform. Combined with rich client technologies, the wheat production and management support prototype system based on service-oriented architecture and WebGIS (WPMSS-GISOA) was developed. The functions of map data uploading and publishing, weather and soil data querying, wheat planting design, spatial interpolation analysis, and so on were realized in this system. Functional test indicated that the web service composition framework for regional applications of crop models based on service-oriented architecture and WebGIS was feasible, which provides a reference for online seamless integration between crop models and geographic information system.
Number of references:22
Main heading:Web services
Controlled terms:Artificial intelligence - Crops - Decision support systems - Geographic information systems - Industrial management - Information services - Integral equations - Interpolation - Maps - Models  - Quality of service - Service oriented architecture (SOA) - Websites
Uncontrolled terms:Crop model - Development platform - Development process - Functional test - Geographic processing service - Integration process - Interface designs - Management support - Map data - Model sharing  - Online integration - Prototype system - Rich client - Seamless integration - Service compositions - Soil data - Spatial interpolation - Support systems - Thematic maps - Web service composition  - Web-GIS - Wheat production
Classification code:921.2 Calculus - 912.2 Management - 903.4 Information Services - 903.3 Information Retrieval and Use - 902.1 Engineering Graphics - 921.6 Numerical Methods - 821.4 Agricultural Products - 722.4 Digital Computers and Systems - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2012.08.025
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 30>

Accession number:20121915008026
Title:Optimal design of submersible multistage pumps with low specific speed
Authors:Si, Qiaorui (1); Yuan, Shouqi (1); Wang, Chuan (1); Hu, Bo (1)
Author affiliation:(1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhen Jiang 212013, China
Corresponding author:Yuan, S.(shouqiy@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:122-127
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to satisfy the demand of non-overload, submersible pump QS10 was selected as example to improve efficiency of centrifugal pump with low-specific-speed. Ten factors were carefully designed such as outlet width of impeller blade, inlet attack angle, blade number, inlet setting angle of guide vane, etc. 27 projects were decided upon L<inf>27</inf>(3¹⁰) orthogonal test and the method of predicting multi-stage pump performance was studied. Based on analyzing the numerical simulation results of 2 stage models, the influence orders of geometry parameters on pump shaft power and efficiency were obtained. Results show that inlet setting angle of guide vane is predominant of ten factors affecting efficiency while blade setting angle is predominant affecting shaft power. And the optimal project selected after orthogonal test analysis was produced to test. The efficiency of designed point is up to 58.61% higher than the state regulation 51% and the maximum shaft power value is 3.83 kW complying with the design requirement of 4 kW, which verified the feasibility of the method of orthogonal design combined with numerical simulation in pump optimization design.
Number of references:18
Main heading:Computer simulation
Controlled terms:Centrifugal pumps - Design - Efficiency - Optimization - Pumps
Uncontrolled terms:Attack angle - Blade numbers - Design requirements - Geometry parameter - Guide vane - Impeller blades - Low-specific-speed - Multi-stage - Multistage pumps - Non-overload  - Optimal design - Orthogonal design - Orthogonal test - Pump optimization - Pump performance - Pump shaft power - Shaft power - Stage models - State regulations
Classification code:408 Structural Design - 618.2 Pumps - 723.5 Computer Applications - 913.1 Production Engineering - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2012.08.019
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 31>

Accession number:20121915008024
Title:Experiment on strength of rapeseed pod dehiscence based on impending fracturing method
Authors:Li, Yaoming (1); Zhu, Junqi (1); Xu, Lizhang (1); Zhao, Zhan (1)
Author affiliation:(1) Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China; (2) Jiangsu Province Agricultural Equipment and Intelligent High Technology Laboratory, Zhenjiang 212013, China
Corresponding author:Li, Y.(ymli@ujs.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:111-115
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For exploring the pod not easy to burst, on the basis of advantages and disadvantages of the existing test method of the strength of rapeseed pod dehiscence, experiment on the strength of different varieties of rapeseed pod dehiscence based on the impending fracturing rape pod method in WDW-type 300 was conducted, and effects of rapeseed varieties, pod size, pod moisture content, pod maturity on the strength of dehiscence were analyzed. The results showed that the load was expressed in a single peak curve with the peak of the strength of rapeseed pod dehiscence as the displacement increased when the loading speed was 10 mm/min. The strength of 28 varieties of rapeseed pod dehiscence was between the range of 0.898-3.035 N. The higher moisture content of the same kind of rape pod, the smaller the strength of rapeseed pod dehiscence when the rapeseed pod is smaller. When the rape pod had significant difference in the size, the strength of rapeseed pod dehiscence increased with the increasing pods size. When the varieties of the rapeseed pod dehiscence is the same, the strength of rapeseed pod dehiscence increased with the increasing moisture. This research provides a new method for measuring the strength of rapeseed pod dehiscence easy and fast.
Number of references:20
Main heading:Oilseeds
Controlled terms:Experiments - Loading - Moisture - Moisture determination - Testing
Uncontrolled terms:Content - Impending fracturing method - Loading speed - POD method - Rape pod - Single peak - Test method - The strength of dehiscence
Classification code:423.2 Non Mechanical Properties of Building Materials: Test Methods - 672 Naval Vessels - 801.4 Physical Chemistry - 821.4 Agricultural Products - 901.3 Engineering Research - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2012.08.017
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 32>

Accession number:20121915008020
Title:Coordinated control of upshift power of double clutch transmission for electric vehicle based on particle swarm optimization
Authors:Gu, Qiang (1); Cheng, Xiusheng (1)
Author affiliation:(1) College of Automotive Engineering, Jilin University, Changchun 130021, China
Corresponding author:Cheng, X.(xiusheng_cheng@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:84-91
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 dynamic model of double clutch transmission during upshift process was established in this paper. The friction work and shock degree were used to establish the evaluating indicator in the form of weighted sum. Considering that the optimizing object of the electric vehicle integrated powertrain shifting control has strong nonlinearity, and that traditional optimizing methods based on gradient algorithm can hardly acquire good result, a particle swarm optimization method to optimize the upshift processing of double clutch transmission was used, in which motor was involved. In the optimizing process, Fourier base vector decomposition method was used to decompose the clutch torque trace and the motor torque trace to linear combination of base vectors. The particle swarm optimization algorithm was used to optimize these base vectors coefficients in order to scheme out the torque traces of DCT and electric motor output. And then an integrated control method of motor and double clutch transmission was proposed. With the vehicle test result, the new control method reduced the friction work by 9%, and kept shock degree within a reasonable range which satisfied the national standard. The optimized gear shifting time was also reduced and the quality of gear shifting was improved.
Number of references:20
Main heading:Clutches
Controlled terms:Algorithms - Electric vehicles - Particle swarm optimization (PSO) - Torque motors - Transmissions
Uncontrolled terms:Base vectors - Clutch transmissions - Co-ordinated control - Control methods - Decomposition methods - Evaluating indicators - Fourier - Friction work - Gear shifting - Gradient algorithm  - Integrated powertrain - Linear combinations - Motor torque - National standard - Particle swarm optimization algorithm - Particle swarm optimization method - Strong nonlinearity - Vehicle tests - Weighted Sum
Classification code:432 Highway Transportation - 602.2 Mechanical Transmissions - 705.3 Electric Motors - 723 Computer Software, Data Handling and Applications - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.08.013
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 33>

Accession number:20121915008011
Title:Automatic identification of irrigation and drainage system in land reclamation area based on object-oriented classification
Authors:Wu, Jiansheng (1); Liu, Jianzheng (1); Huang, Xiulan (1); Peng, Jian (2); Li, Huijian (1)
Author affiliation:(1) Key Laboratory for Environmental and Urban Sciences, Shenzhen Graduate School, Peking University, Shenzhen 518055, China; (2) Key Laboratory for Earth Surface Processes, Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
Corresponding author:Liu, J.(ljz.401@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:25-31
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 identify irrigation and drainage system in land reclamation area automatically, an object-oriented classification method was proposed. The effectiveness of this method was compared with supervised classification method and manual screen digitization in terms of recognition accuracy and efficiency. KOMPSAT-2 high-resolution remote sensing images were selected as the experimental data, and the study area is located in Da'an city of western Jilin province. The experimental results showed that the overall recognition accuracy of object-oriented classification method was 89.64%, much higher than the accuracy of supervised classification method. More over, the object-oriented classification method is less time-consuming than manual screen digitization. The object-oriented classification method needs the least human intervention to complete the classification process and could achieve more stable results than the other two methods. Results show that the object-oriented classification is a powerful tool for remote sensing monitoring of irrigation and drainage system in land reclamation area. Meanwhile, this research provides an effective way for the identification of other ground objects in land reclamation projects.
Number of references:35
Main heading:Drainage
Controlled terms:Automation - Consolidation - Image processing - Image reconstruction - Irrigation - Land reclamation - Remote sensing
Uncontrolled terms:Area-based - Automatic identification - Classification process - Drainage systems - Experimental data - Ground objects - High resolution remote sensing - High resolution remote sensing images - Human intervention - Jilin Province  - Land - Object oriented classification - Reclamation project - Recognition accuracy - Remote sensing monitoring - Study areas - Supervised classification
Classification code:821.3 Agricultural Methods - 741 Light, Optics and Optical Devices - 732 Control Devices - 731.1 Control Systems - 731 Automatic Control Principles and Applications - 502 Mines and Quarry Equipment and Operations - 483 Soil Mechanics and Foundations - 442.2 Land Reclamation - 442 Flood Control; Land Reclamation - 406 Highway Engineering - 401 Bridges and Tunnels
DOI:10.3969/j.issn.1002-6819.2012.08.004
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 34>

Accession number:20121915008040
Title:Detection algorithm of white foreign fibers based on improved two-dimensional maximum between-class variance method
Authors:Wang, Haopeng (1); Feng, Xianying (1); Li, Li (1)
Author affiliation:(1) Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Jinan 250061, China; (2) Department of Computer, Shandong Economic Management Institute, Ji'nan 250014, China
Corresponding author:Feng, X.(fxying@sdu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:214-219
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The white foreign fibers detection is a difficult problem of the lint online detection. Through the analysis of the 2D gray histogram of white foreign fibers and lint, the two-dimensional Otsu algorithm was improved. This improved algorithm considered the probabilities of the counter-diagonal area in 2D gray histogram when the probabilities of objective and background was calculated, and reduced the range of threshold. The results indicated that the improved algorithm of 2D effectively enhanced the accuracy and real-time property of segmentation comparing with the one-dimensional Otsu algorithm and the fast two-dimensional Otsu algorithm. The improved algorithm has been successfully used in practical production.
Number of references:16
Main heading:Algorithms
Controlled terms:Cotton - Fibers - Graphic methods - Two dimensional
Uncontrolled terms:Detection algorithm - Foreign fiber - Foreign fibers detection - Gray histogram - Improved algorithm - On-line detection - Otsu algorithm - Practical production - Real-time properties - Variance method
Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 819.1 Natural Fibers - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.08.033
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 35>

Accession number:20121915008012
Title:Scale effects of storm-runoff processes in agricultural areas in Huaibei Plain
Authors:Han, Songjun (1); Wang, Shaoli (1); Xu, Di (1); Zhang, Qibing (3)
Author affiliation:(1) State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100048, China; (2) National Center of Efficient Irrigation Engineering and Technology Research, Beijing 100048, China; (3) Anhui Province Water Resources Research Institute, Bengbu 233000, China
Corresponding author:Han, S.(hansj@iwhr.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:32-37
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on the observed rainfall and runoff data in 11 rainstorm events during the flood season from 1997 to 2007 at three different spatial scales (plot: 1600m², field: 6 hm² and small catchment: 1.36km²) in Huaibei Plain, China, the scale effects of storm-runoff processes in agricultural areas of Huaibei Plain were analyzed. The differences in storm-runoff processes and their main influences at different scales in agricultural area were evaluated. Results showed the storm-runoff process at the small plot was obviously different from that in the other two catchments, and the runoff depth is smaller and flood peak modulus is larger in the small plot than in the field and two catchments during same rainstorm event. At the plot scale, there is no lateral groundwater discharge process, which may be the main reason for the different storm-runoff processes. The runoff processes in the 6 hm² field and 1.36 km² catchments were similar, but the runoff depth and flood peak modulus at the catchment 1.36 km² is smaller than that at the middle scale. This research indicated that storage capacity in the large scale may be the main reason for the smaller runoff depth and flood peak modulus.
Number of references:21
Main heading:Agricultural runoff
Controlled terms:Agriculture - Catchments - Flood control - Floods - Runoff - Storms
Uncontrolled terms:Agricultural areas - Depth - Different scale - Effect - Flood peak - Flood season - Ground water discharge - Huaibei Plain - Runoff data - Runoff depth  - Scale - Scale effects - Small catchment - Spatial scale - Storage capacity - Storm runoff
Classification code:914.1 Accidents and Accident Prevention - 821.5 Agricultural Wastes - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 454.1 Environmental Engineering, General - 444.1 Surface Water - 444 Water Resources - 443.3 Precipitation
DOI:10.3969/j.issn.1002-6819.2012.08.005
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 36>

Accession number:20121915008039
Title:Multi-leaf area measurement method based on geometric correction with rectangular box
Authors:Chen, Taotao (1); Chi, Daocai (1); Liang, Qian (2)
Author affiliation:(1) Water Conservancy Institute, Shenyang Agricultural University, Shenyang 110866, China; (2) Rice Research Institute, Shenyang Agricultural University, Shenyang 110866, China
Corresponding author:Chi, D.(daocaichi@vip.sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:206-213
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 limitations of both leaf-by-leaf measurement and oblique distortion of digital image, this paper presents a multi-leaf area measurement method based on geometric correction with rectangular box (GCCA for short). The method extracts rectangle box using Hough transform, carries out geometric rectification, and enables Multi-leaf simultaneous measurement using connecting regions scan. At the same time this method is carried out by Visual Basic 2010 programming, and be compared with grid method, length-width method and Photoshop method respectively. Experimental results indicate that the GCCA method is a high stability method with great relevance to grid method and a broad applicable scope. Inheriting the advantages of digital photography image processing method, the GCCA method is also a rapid method for measurement of plant leaf area and its measurement speed increases as the number of leaves increases in a single image. Compilation of the software can eliminate the influence of human factors, and greatly improve the interactivity and versatility of leaf area measurement. GCCA method can be both applied to indoor and non-destructive measurement outdoor, providing a practical new approach for leaf area measurement.
Number of references:28
Main heading:Geodesy
Controlled terms:Geometry - Hough transforms - Image processing - Mathematical programming - Measurements - Surveying
Uncontrolled terms:Area measurement - Connecting regions scan - Digital image - Digital photography - Geometric correction - Geometric rectification - Grid methods - High stability - Image processing - methods - Interactivity  - Leaf area - Measurement speed - Non-destructive measurement - PhotoShop - Plant leaf - Rapid method - Rectangular box - Simultaneous measurement - Single images
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922 Statistical Methods - 921.3 Mathematical Transformations - 921 Mathematics - 741 Light, Optics and Optical Devices - 405.3 Surveying
DOI:10.3969/j.issn.1002-6819.2012.08.032
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 37>

Accession number:20121915008022
Title:Calculation and verification of quantitative parameters of optimal planting density of machine-transplant rice
Authors:Li, Ganghua (1); Yu, Linhui (1); Hou, Pengfu (1); Wang, Shaohua (1); Liu, Zhenghui (1); Wang, Qiangsheng (1); Ling, Qihong (1); Ding, Yanfeng (1)
Author affiliation:(1) Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China; (2) The Bureau of Agricultural Machinery Administration of Jiangsu Province, Nanjing 210024, China
Corresponding author:Ding, Y.(dingyf@njau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:98-104
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 calculation of transplant rice, taking conventional japonica rice (Ningjing-3) and hybrid japonica rice (Changyou-1) as material, different planting density experiments were conducted to determine the parameters in planting density quantitative equation of machine-transplant rice. Then optimized cultivation program for machine-transplanting rice was designed using the machine-transplanting rice cultivation system and the designed leaf area index at heading, dry matter at maturity, harvest index, yield and yield components were compared with the measured values in the experiments. The results showed that missing tiller number of the machine-transplant conventional japonica rice and hybrid japonica rice was 1.5 and 0.5, respectively. Seedling number per hole significantly affected the adjusting factor in plant density quantitative equation. Highest yield was obtained for conventional japonica rice with 3 seedlings per hole and for hybrid japonica rice with 2 seedlings per hole, respectively. Thus, the adjusting factor was set to be 1.5 for conventional japonica rice and 1.0 for hybrid japonica rice. The tiller emerging rates after transplanting were 0.8 for both conventional and hybrid japonica rice. The comparison showed that the deviation between designed and average measured values was less than 5%, which verified the reliability of parameters in planting density quantitative equation for machine-transplanted rice. This research provides a technology support for accurately determining planting density for machine-transplant rice.
Number of references:24
Main heading:Machine components
Controlled terms:Agriculture - Agronomy - Experiments - Optimization - Parameter extraction - Verification
Uncontrolled terms:Dry matters - Harvest index - Japonica rice - Leaf Area Index - Machinical transplanting - Optimal planting density - Plant densities - Planting density - Quantitative parameters - Reliability of parameters  - Rice - Rice cultivation - Technology support - Tiller number - Yield components
Classification code:922 Statistical Methods - 921.5 Optimization Techniques - 901.3 Engineering Research - 821.3 Agricultural Methods - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723.1 Computer Programming - 601.2 Machine Components
DOI:10.3969/j.issn.1002-6819.2012.08.015
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 38>

Accession number:20121915008044
Title:Variation characteristics of soil temperature at south edge area in sinking-mode greenhouse
Authors:Wang, Siqian (1); Zhang, Zhilu (1); Hou, Weina (1); Yi, Donghai (1); Sun, Zhiqiang (1)
Author affiliation:(1) College of Horticulture, Henan Agricultural University, Zhengzhou 450002, China
Corresponding author:Sun, Z.(sunzhiqiang1956@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:235-240
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To further optimize the structure of the greenhouse, the variation characteristics of the temperature in south edge area in the sinking-mode greenhouse of the sinking depth 80 cm was analyzed and the comparison of the soil temperature of this mode and the non-sunken greenhouse was made. The temperature inside greenhouse 0~5 m from south vertical wall (0.1 m depth) and outside greenhouse 0~1 m from south vertical wall (0~60 cm depth) were measured. The results showed that the distance of boundary point for soil temperature at the south edge area was 160 cm from the south vertical wall of the greenhouse in January, and it was only 20cm from that in late March. In mid-January, in one day the farthest point appeared during &ge;03:00~09:00, which was located at 180 cm from the south, and the nearest point appeared during &ge;15:00~18:00, which was located at 60 cm. Compared with the south edge area in the non-sunken greenhouse, the size of the sinking greenhouse was obviously reduced. At distance 0~1 m from south vertical wall (0~60 cm depth) outside greenhouse, relatively stable interface of temperature existed in both the facade that perpendicular to south vertical wall and the facade that perpendicular to surface. As one of an index of the optimized design of a greenhouse, the reduction of edge area can show the superiority of the sinking-mode sunlight greenhouse in Henan province.
Number of references:20
Main heading:Greenhouses
Controlled terms:Optimization - Soils - Temperature
Uncontrolled terms:Boundary points - Henan Province - Nearest point - Optimized designs - Soil temperature - Variation characteristics - Vertical wall
Classification code:402.1 Industrial and Agricultural Buildings - 483.1 Soils and Soil Mechanics - 641.1 Thermodynamics - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2012.08.037
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 39>

Accession number:20121915008030
Title:Design and realization of distributed traceability system of aquatic products based on supervision mode
Authors:Sun, Chuanheng (1); Yang, Xinting (2); Li, Wenyong (2); Liu, Xuexin (2); Li, Daoliang (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; (2) National Engineering Research Center for Information Technology in 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:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:146-153
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:After comparative analysis on the construction mode of domestic and foreign agricultural product traceability system, an aquatic product traceability system architecture was developed based on the administrative supervision and Chinese situation. The key technologies of the aquatic products traceability were studied, including the aquatic products traceability code scheme based on administrative divisions codes, the decimal group compressed encryption algorithm of aquatic products code based on AES (Advanced Encryption Standard), the dynamic allocation technology of aquatic traceability code based on USB key. The mixed aquatic products label including one-dimensional code and two-dimensional code were designed. The results of application test in several provinces showed that the system could be easily installed and deployed, and the traceability code had the characteristics of easy input and high safety.
Number of references:18
Main heading:Product design
Controlled terms:Agricultural products - Cryptography - Data privacy - Encoding (symbols)
Uncontrolled terms:AES - Aquatic products - Supervision - Traceability systems - USB Key
Classification code:913.1 Production Engineering - 821.4 Agricultural Products - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television
DOI:10.3969/j.issn.1002-6819.2012.08.023
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 40>

Accession number:20121915008037
Title:Three-dimensional volume measurement of trees based on digital elevation model
Authors:He, Cheng (1); Feng, Zhongke (1); Yuan, Jinjun (2); Wang, Jia (1); Dong, Zhihai (1); Gong, Yinxi (1)
Author affiliation:(1) Mapping and 3S Technology Center, Beijing Forestry University, Beijing 100083, China; (2) Public Safety Institute, Tsinghua University, Beijing 100084, China; (3) Beijing Institute of Surveying and Mapping, Beijing 100038, China
Corresponding author:Feng, Z.(fengzhongke@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:195-199
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to measure three-dimensional volume of trees with non-destruction and high accuracy, a digital elevation model was built in this paper through digital mapping software based on the trees point cloud data measured by three-dimensional laser scanning system. After building the triangulation, the volume of trees would be calculated through the earthwork calculation function of mapping software and the calculation principle of system was described in detail. 20 pines with different height and volume selected from experimental area were taken as research objects to measure with ten repeated tests by the proposed system, and then measured results were compared with manual measurement. It was concluded that experimental results had good agreement with manual measurement results (standard error was 3.54, absolute error was 7.002, relative error was 3.15%, and accuracy was up to 96.852%), so this system can be used in volume measurement of trees.
Number of references:21
Main heading:Three dimensional
Controlled terms:Digital instruments - Forestry - Geomorphology - Surveying - Titration - Trees (mathematics) - Volume measurement
Uncontrolled terms:Absolute error - Accuracy analysis - Different heights - Digital elevation model - Digital mapping software - Laser scanning systems - Mapping softwares - Measured results - Measurement results - Non-destruction  - Point cloud data - Relative errors - Research object - Standard errors - Three-dimensional volume - Trees
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943.2 Mechanical Variables Measurements - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 902.1 Engineering Graphics - 821.0 Woodlands and Forestry - 801 Chemistry - 481.1.1 Geomorphology - 405.3 Surveying
DOI:10.3969/j.issn.1002-6819.2012.08.030
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 41>

Accession number:20121915008008
Title:Influencing factors analysis and prediction of agricultural drought in Mekong River Basin
Authors:Wu, Di (1); Pei, Yuansheng (1); Zhao, Yong (1); Xiao, Weihua (1)
Author affiliation:(1) State Key Laboratory of Simulation and Regulation of River Basin Water Cycle, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
Corresponding author:Wu, D.(wudisyau075@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:1-10
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Taking the Mekong River Basin as a study area, agricultural drought in monthly scale was predict based on the typical index of soil moisture of root layer by regional climate model(RegCM3) forced by the output of ECHAM5/MPI-OM global atmosphere-ocean coupled model in current(1980-2009) and future(2010-2039) under SRES A1B scenario in this paper. Based on the theory of surface energy balance, the relationship and changing regularity was analyzed between the main influencing factors of agricultural drought (such as precipitation, evaporation, surface temperature) and atmosphere circulation, energy fluxes (such as sensible flux, latent heat flux, surface net flux) simulated by RegCM3.From the aspects of surface energy and moisture flux balance, the mechanism of agriculture drought in the Mekong River Basin was preliminarily identified. The results show that the trend of the precipitation decrease, surface temperature increase, evaporation increase, and soil moisture decrease of experimental zone in late spring (June) and autumn (October) may cause the agricultural drought occurrence in local region of Mekong River basin in future.
Number of references:24
Main heading:Drought
Controlled terms:Agriculture - Atmospheric temperature - Climate models - Evaporation - Factor analysis - Interfacial energy - Phase transitions - Soil moisture - Surface properties - Temperature  - Watersheds
Uncontrolled terms:A1B scenarios - Agricultural drought - Changing regularity - Coupled models - Dynamical downscaling - Energy fluxes - Experimental zone - Influencing factor - Influencing factors analysis - Local region  - Mekong river basins - Moisture fluxes - Monthly scale - Regional climate models - Study areas - Surface temperatures
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 921 Mathematics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 802.3 Chemical Operations - 641.1 Thermodynamics - 483.1 Soils and Soil Mechanics - 444.1 Surface Water - 444 Water Resources - 443.1 Atmospheric Properties - 443 Meteorology
DOI:10.3969/j.issn.1002-6819.2012.08.001
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 42>

Accession number:20121915008042
Title:Application and operation effect of 200 W concentrated wind energy generator
Authors:Chen, Songli (1); Tian, De (1); Xin, Haisheng (1); Han, Qiaoli (1); Sun, Yunfeng (1)
Author affiliation:(1) College of Energy and Transport Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China; (2) College of Renewable Energy, North China Electric Power University, Beijing 102206, China
Corresponding author:Tian, D.(tiande8325@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:225-229
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Concentrated wind energy generator uses concentrated equipment to turn rare and unstable wind into equal wind. 200 W Concentrated wind energy generator has been applied in many regions in Japan and China. When natural wind speed of 200 W concentrated wind energy generator was 10 m/s, the efficiency of turbine was 0.603, power of system reached 208.6 W, coefficient of wind energy utilization of 200 W concentrated wind energy generator was 0.52 and the turbine worked well. Compared with some other excellent power systems, the 200 W concentrated wind energy generator had short diameter, low start wind speed and high coefficient of wind energy utilization characteristics, which has wide application prospect.
Number of references:24
Main heading:Wind power
Controlled terms:Applications - Concentration (process) - Electric generators - Energy utilization - Turbines - Wind effects
Uncontrolled terms:Application prospect - Japan and China - Natural wind - Operation effect - Power coefficients - Wind energy generators - Wind speed
Classification code:802.3 Chemical Operations - 705.2 Electric Generators - 615.8 Wind Power (Before 1993, use code 611 ) - 612.3 Gas Turbines and Engines - 525.3 Energy Utilization - 451.2 Air Pollution Control - 443.1 Atmospheric Properties
DOI:10.3969/j.issn.1002-6819.2012.08.035
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 43>

Accession number:20121915008052
Title:Effects comparison of superfine pulverizing of Lentinus Edodes stem by air jet milling and wheel grinding
Authors:Shi, Defang (1); Zhou, Ming (1); Guo, Peng (2); Yang, De (1); Xue, Shujing (1); Li, Lu (2); Gao, Hong (1)
Author affiliation:(1) National Research and Development Center for Edible Fungi Processing, Wuhan 430064, China; (2) Research Institute of Agricultural Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Science, Wuhan 430064, China
Corresponding author:Gao, H.(highong@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:280-286
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Air jet milling and wheel grinding were used to superfine pulverize lentinus edodes stem to improve added values. The operation parameters such as classifier rotating speed of air jet milling, host frequency and fan frequency of wheel grinding and feeding speed of two processes were analyzed and optimized using single factor test and piecewise linear fitting method. The pulverizing effect, processing time, production rate and energy consumption of two equipments were compared under respective optimized operation conditions. The results showed that the optimized rotating speed and feeding speed of air jet milling were 2400 r/min and 12 kg/h, respectively. The optimized host frequency, fan frequency and feeding speed of wheel grinding were 44Hz, 42 Hz and 5 kg/h, respectively. The superfine powder with particle median diameter (D<inf>50</inf>) less than 10&mu;m could be obtained by both superfine pulverizing methods. Compared with wheel grinding, air jet milling pulverized powder more precisely (with narrower particle size distribution) and spent less processing time (shortened by 56.43%), but obtained lower production rate and required higher energy consumption (4.77 times). On the whole, the wheel grinding method was more suitable for scale production of lentinus edodes stem. This research provides technical basis for the development and application of superfine pulverizing technology in lentinus edodes stem processing.
Number of references:25
Main heading:Grinding (machining)
Controlled terms:Agricultural products - Energy utilization - Feeding - Jets - Milling (machining) - Optimization - Particle size analysis - Piecewise linear techniques - Processing - Rotating machinery  - Wheels
Uncontrolled terms:Added values - Air jet - Feeding speed - Lentinus edodes - Median diameters - Operation parameters - Optimized operations - Piecewise linear - Processing time - Production rates  - Rotating speed - Superfine powders
Classification code:951 Materials Science - 921.5 Optimization Techniques - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 913.4 Manufacturing - 821.4 Agricultural Products - 691.2 Materials Handling Methods - 631.1 Fluid Flow, General - 604.2 Machining Operations - 601.2 Machine Components - 601.1 Mechanical Devices - 525.3 Energy Utilization
DOI:10.3969/j.issn.1002-6819.2012.08.045
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 44>

Accession number:20121915008053
Title:Contourlet transform as an effective method for agricultural product image denoising
Authors:Song, Huaibo (1); He, Dongjian (1); Han, Tao (1)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:He, D.(hdj87091197@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:287-292
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Image denoising for agricultural product image is a one of the most basic and important step in agricultural image processing. Wavelet transform has the weakness of isotropy, which limits its use in image denoising. To solve this problem, a new image denoising algorithm based on Contourlet transform is presented. The algorithm fully utilized the advantages of Contourlet transform such as flexible multi-resolution, anisotropy and a sparse representation. In the first step, the image is decomposed by PDFB (pyramidal directional filter bank), and in the second step, the muti-scale threshold shrinkage algorithm is presented to remove the noise in high frequency sub-band, in the last step, inverse transformation of Contourlet is used and the agricultural product image denoising is realized. In order to test the performance of Contourlet denoising algorithm, a comparative test is made by using Wavelet, median filter, mean filter, Gaussian Filter and Wiener filtering methods. Results show that Contourlet denoising algorithm is suitable for agricultural product images and it also has the advantage of PSNR (higher peak signal to noise ratio) and visual effect. The algorithm proposed is practical and valid for agricultural product image denosing.
Number of references:18
Main heading:Agricultural products
Controlled terms:Algorithms - Image analysis - Image denoising - Image processing
Uncontrolled terms:Comparative tests - Contourlet transform - Contourlets - Contrasts - De-noising algorithm - Directional filter banks - Gaussian filters - High frequency - Image denoising algorithm - Inverse transformations  - Mean filter - Multi-resolutions - PDFB - Peak signal to noise ratio - Product images - PSNR - Sparse representation - Subbands - Visual effects - Wiener filtering
Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 741 Light, Optics and Optical Devices - 821.4 Agricultural Products - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2012.08.046
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

<RECORD 45>

Accession number:20121915008046
Title:Research on carbonyl compound emission of methanol-diesel fuel and bio-diesel fuel
Authors:Zhang, Xuemin (1); Li, Fang (1); Ge, Yunshan (2); Wang, Xiaoyan (1); Li, Hongwen (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) National Laboratory of Auto Performance and Emission Test, Beijing Institute of Technology, Beijing 100081, China
Corresponding author:Li, H.(lhw@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:247-251
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to investigate carbonyl compound emission of methanol-diesel fuel and bio-diesel fuel, 14 sorts of different carbonyl compound from 3 different fuels (diesel, methanol-diesel and biodiesel) were investigated using High-performance Liquid Chromatography. The result showed the unregulated emissions from the two substitute fuels were greatly variable: 1) the overall specific emission of carbonyl compound increased. Compared with diesel, the carbonyl compound emission from Methanol-diesel increased 144.6%, and emission from biodiesel increased 67.5%; 2) formaldehyde was above 35.3% in the carbonyl compound emission under the testing condition; 3) In general, carbonyl compound increased as speed increasing or load decreasing when engine fueled methanol-diesel and biodiesel. The study provides reference for building carbonyl compound standards for using substitute fuels and matching the environment protection energy saving requirements.
Number of references:14
Main heading:Methanol fuels
Controlled terms:Aldehydes - Biodiesel - Biofuels - Diesel fuels - Emission control - High performance liquid chromatography - Ketones - Load testing - Methanol - Organic compounds
Uncontrolled terms:Bio-diesel fuel - Environment protection - Speed increasing - Substitute fuels - Testing conditions - Unregulated emissions
Classification code:451.2 Air Pollution Control - 483.1 Soils and Soil Mechanics - 523 Liquid Fuels - 801 Chemistry - 804.1 Organic Compounds
DOI:10.3969/j.issn.1002-6819.2012.08.039
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.

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Accession number:20121915008018
Title:Effects of alternate partial root-zone irrigation on maize water use and soil microbial biomass carbon
Authors:Liu, Shui (1); Li, Fusheng (1); Wei, Xianghua (1); Nong, Mengling (1)
Author affiliation:(1) College of Agriculture, Guangxi University, Nanning 530005, China
Corresponding author:Li, F.(zhenz@gxu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:28
Issue:8
Issue date:April 15, 2012
Publication year:2012
Pages:71-77
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:Alternate partial root-zone irrigation creates a heterogeneous soil moisture distribution that may affect soil microbiological activity and crop water and nutrient use. In order to understand such effect, this study investigated dry mass accumulation and water use, microbial biomass carbon (MBC), dissolved organic carbon (DOC) and CO<inf>2</inf> release quantity of basic and induced respiration in soils from jointing to early grain filling stages of maize subjected to conventional irrigation and alternate partial root-zone irrigation (AI) (respectively carried out at seedling-early grain filling, seedling-jointing and jointing-tasselling stages, i. e. AI<inf>1</inf>, AI<inf>2</inf> and AI<inf>3</inf>) using a pot experiment under two irrigation levels, i. e. normal irrigation (F<inf>1</inf>, 70%-80% field capacity) and mild water deficit (F<inf>2</inf>, 60%-70% field capacity), and two ratios of inorganic to organic N, i. e. 100% inorganic N and 70% inorganic N 30% organic N. Results show that at mild water deficit condition, alternate partial root-zone irrigation at jointing-tasselling stages increased total dry mass and water use efficiency of maize by 23.2%-27.4% and 23.3%-26.7% when compared to conventional irrigation. Under the same fertilization and irrigation levels, alternate partial root-zone irrigation at jointing-tasselling stages increased soil MBC, but reduced CO<inf>2</inf> release quantity of induced respiration at the tasselling stage. Compared to only inorganic N, combined application of organic and inorganic N increased total dry mass of maize, and increased CO<inf>2</inf> release quantity of basic and induced respiration in soil at the early grain filling stage under certain soil moisture conditions (W<inf>1</inf>CI, W<inf>1</inf>AI<inf>1</inf> and W<inf>1</inf>AI<inf>2</inf>). Therefore, alternate partial root-zone irrigation at the jointing-tasselling stage could increase total dry mass and water use efficiency of maize and soil microbial biomass carbon under mild water deficit condition.
Number of references:25
Main heading:Irrigation
Controlled terms:Biomass - Carbon - Carbon dioxide - Efficiency - Injection molding - Soil moisture - Water supply
Uncontrolled terms:Alternate partial root-zone irrigation - Dissolved organic carbon - Dry mass - Field capacity - Grain filling - Heterogeneous soils - Irrigation level - Maize - Microbial biomass carbon - Microbiological activity  - Moisture conditions - Pot experiment - Soil microbial biomass carbons - Water deficits - Water use - Water use efficiency
Classification code:821.5 Agricultural Wastes - 821.3 Agricultural Methods - 816.1 Processing of Plastics and Other Polymers - 913.1 Production Engineering - 804.2 Inorganic Compounds - 483.1 Soils and Soil Mechanics - 446.1 Water Supply Systems - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2012.08.011
Database:Compendex
Compilation and indexing terms, Copyright 2012 Elsevier Inc.