Accession number:20101512841295
Title:Exploitation potential of unutilized land suitable for cultivated land based on its suitability in Ji'nan City
Authors:Wang, Xiaoming (1); Yan, Hongwen (2); Bian, Zhengfu (1)
Author affiliation:(1) School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221008, China; (2) College of Population, Resource and Environment, Shandong Normal University, Ji'nan 250014, China
Corresponding author:Bian, Z.
(zfbian@cumt.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:307-312
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 achieving food security, as the cultivated land reserve resources, the exploitation of unutilized land is an important approach to supplement cultivated land. Taking Ji'nan City, Capital of Shandong Province as an example and according to land suitability evaluation, the paper calculates the exploitation potential of unutilized land, and further considering factors such as topographical, traffic condition, infrastructure and location, divides potential areas with cluster analysis. The results show that 65.39% of the unutilized land are suitable for cultivated land, but the quality is lower. Limited by the natural factors, the distribution of the unutilized land suitable for cultivated land in various districts is different. Among all the distribution types of potential area, type I mainly belongs to plain region in the north of Ji'nan City as a priority area. Type II is widely distributed in the north, middle and south of Ji'nan City as the second priority area. Type III mainly in the middle suburb of Ji'nan City is a moderate potential area for exploitation. Type IV mainly distributed in the hilly area of middle part of Ji'nan City is the worst potential area. This study can determine the exploiting sequence of the different regions in Ji'nan City and the research results can provide reference for the exploitation of unutilized land.
Number of references:16
Main heading:Sodium compounds
Controlled terms:Cluster analysis - Land use - Planning - Regional planning
Uncontrolled terms:Cultivated lands - Food security - Hilly areas - Ji'nan City - Land suitability - Natural factors - Potential area - Research results - Shandong province - Suitability evaluation - Traffic conditions - Type II
Classification code:912.2 Management - 804.2 Inorganic Compounds - 804.1 Organic Compounds - 922 Statistical Methods - 723 Computer Software, Data Handling and Applications - 403.2 Regional Planning and Development - 403 Urban and Regional Planning and Development - 442.2 Land Reclamation
DOI:10.3969/j.issn.1002-6819.2010.02.053
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 2>
Accession number:20101512841285
Title:Extraction of information of cultivated land using time-series MODIS data in Thailand
Authors:Lü, Tingting (1); Liu, Chuang (2)
Author affiliation:(1) College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China; (2) Institute of Geographic Sciences and Natural Resources Research, Chinese Acad. of Sci., Beijing 100101, China; (3) World Resource Research, College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China
Corresponding author:Lü, T.
(lvtt.04b@igsnrr.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:244-250
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The difference and the complementariness on the agriculture decide that there is a wide-ranging cooperation on agriculture between China and ASEAN. So the research on ASEAN's agriculture has important significance. In order to acquire the cultivated land related information in Thailand, time-series MODIS data were used in this paper. Firstly, the 250 m cultivated land map was generated by using time-series NDVI data. Then the cropping intensity map was acquired by determining how many peaks were detected in the smoothed NDVI profile on a pixel-by-pixel basis, which then served as a mask to extract crop types in different cropping intensity regions. The results showed that the main land use type in the study area was cultivated land, most of which were dominated by rice. Double or triple rice-cropping system was commonly employed in the Chao Phraya Basin. Upland crops were mainly distributed in the high alluvial terraces of the Chao Phraya Basin. Because Khorat Plateau in the northeast of Thailand often have water shortage problem, particularly in the dry season, which can just support only one crop in a year. However, some upland areas can be cultivated twice a year with crops which have short growing seasons. The crop information extracted from MODIS data sets were assessed by CBERS data, statistic data. It was shown that MODIS derived information related to cultivated land coincided well with the statistic data at the provincial level. At the same time, information extracted by MODIS data sets and CBERS were compared with each other which also showed similar spatial patterns.
Number of references:21
Main heading:Information use
Controlled terms:Crops - Cultivation - Information analysis - Information systems - Land use - Landforms - Pixels - Radiometers - Soil conservation - Spectrometers - Water supply
Uncontrolled terms:Cropping systems - Cultivated lands - Data sets - Dry seasons - Extraction of information - Growing season - Land use type - MODIS - NDVI data - Spatial patterns - Statistic data - Study areas - Thailand - Upland area - Water shortages
Classification code:821.3 Agricultural Methods - 821.4 Agricultural Products - 903.1 Information Sources and Analysis - 801 Chemistry - 903.2 Information Dissemination - 941.3 Optical Instruments - 944.7 Radiation Measuring Instruments - 903.3 Information Retrieval and Use - 742.2 Photographic Equipment - 442.2 Land Reclamation - 446.1 Water Supply Systems - 481.1 Geology - 403 Urban and Regional Planning and Development - 483.1 Soils and Soil Mechanics - 723.5 Computer Applications - 741.3 Optical Devices and Systems - 722.2 Computer Peripheral Equipment
DOI:10.3969/j.issn.1002-6819.2010.02.042
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 3>
Accession number:20101512841254
Title:Effect of spatial electric field on soil moisture and barley growth
Authors:Chen, Shuying (1); Li, Xuying (1); Liu, Yu (1); Tai, Ping (1); Liu, Binjiang (2)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China; (2) Dalian Agricultural Mechanization Institute, Dalian 116021, China; (3) Department of Mechanical and Electrical Engineering, Baotou Light Industry Vocational Technical College, Baotou 014045, China
Corresponding author:Li, X.
(lixuy2000@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:59-63
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The effect of spatial electric field on soil moisture around barley root and barley growth under different pole distance (2.5, 2.0, 1.5 m) were studied in this paper. The results indicated that soil evaporation around barley root was restrained effectively in sunny day when the positive electric field was applied. If the field voltage and interval time are constant, the electric field intensity will be different under the different pole distances, and the effect of boosting plant growth will be different by restraining evaporation and moisture. The soil evaporation restrained effect was the best under a pole distance of 2.0 m. It also proved that spatial electric field can increase the weight of seeding and promoted the growth of barley height, which are increased by 26%-53% and 24%-68%, respectively, compared with the electric field in atmosphere, the best pole distance is 2 m for the plant growth. It shows that the appropriate positive electric field can restrain soil evaporation and promotes plant growth.
Number of references:31
Main heading:Engineering exhibitions
Controlled terms:Biological radiation effects - Dissociation - Electric field measurement - Electric fields - Evaporation - Moisture determination - Plant life extension - Poles - Soil moisture
Uncontrolled terms:Barley - Barley growth - Biological effects - Electric field intensities - Field voltage - Interval time - Plant growth - Pole distance
Classification code:944.2 Moisture Measurements - 744 Lasers - 802.2 Chemical Reactions - 802.3 Chemical Operations - 901.2 Education - 912.1 Industrial Engineering - 942.2 Electric Variables Measurements - 711 Electromagnetic Waves - 622.2 Radiation Effects - 483.1 Soils and Soil Mechanics - 461.2 Biological Materials and Tissue Engineering - 408.2 Structural Members and Shapes - 402.1 Industrial and Agricultural Buildings - 701.1 Electricity: Basic Concepts and Phenomena
DOI:10.3969/j.issn.1002-6819.2010.02.011
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 4>
Accession number:20101512841262
Title:Dynamic change of hill slope and gully erosion in typical area of black soil region during the past 40 years
Authors:Yan, Yechao (1); Zhang, Shuwen (2); Yue, Shuping (1)
Author affiliation:(1) College of Remote Sensing, Nanjing University of Information Science and Technology, Nanjing 210044, China; (2) Northeast Institute of Geography and Agricultural Ecology, Chinese Acad. of Sci., Changchun 130012, China
Corresponding author:Zhang, S.
(zhangshuwen@neigae.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:109-115
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:It has significant theoretical and practical value to conduct the research on dynamics of hill slope and gully erosion for better understanding soil erosion process and drawing up protection measures in the black soil area of Northeast China. In this paper, taking eastern Kebai black soil area as an example, high resolution satellite images, including the Corona spy satellite images of 1965 and Spot-5 images of 2005, were used to extract two periods of information such as gullies, vegetation, land use, etc. The spatial data of terrain, precipitation and soil, as well as the attracted data from the images were used to develop a hill slop erosion model based on the framework of universal soil loss equation (USLE). Thereafter, the hill slope and gully erosion dynamics during the past 40 years was analyzed. The results showed that hill slope erosion in this area was dominated by light erosion grade. The area of moderate and heavy erosion grades only occupied a small portion. Although the total area of hill slope erosion changed just a little, the change of hill slope erosion grade varied from place to place. The number of gullies in the study area increased from 1682 in 1965 to 2561 in 2005. Farmland area was swallowed by growing gullies at a speed of 5.23 hm<sup>2</sup> each year. The ratio of hill slope erosion and gully erosion was approximately 3.5:1, suggesting that the sediment mainly came from the hill slope. The research result could provide a scientific basis for controlling water and soil loss in black soil area of Northeast China.
Number of references:19
Main heading:Slope protection
Controlled terms:Dynamic analysis - Geographic information systems - Geologic models - Image processing - Information systems - Land use - Remote sensing - Sediment transport - Soils - Space surveillance
Uncontrolled terms:Black soil - Black soil area - Dynamic changes - Erosion models - Gully erosion - High resolution satellite images - Northeast China - ON dynamics - Protection measures - Research results - Slope erosion - Soil erosion - Soil loss - Spatial data - Spy satellites - Study areas - Universal soil loss equation
Classification code:656.2 Space Research - 723.2 Data Processing and Image Processing - 723.3 Database Systems - 631.3 Flow of Fluid-Like Materials - 731.1 Control Systems - 903.2 Information Dissemination - 903.3 Information Retrieval and Use - 741 Light, Optics and Optical Devices - 483.1 Soils and Soil Mechanics - 404.1 Military Engineering - 405.3 Surveying - 407.1 Maritime Structures - 403 Urban and Regional Planning and Development - 422.2 Test Methods - 442.2 Land Reclamation - 481.1 Geology - 441.1 Dams
DOI:10.3969/j.issn.1002-6819.2010.02.019
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 5>
Accession number:20101512841275
Title:Development of plane polar probe of capacitive grain moisture sensor
Authors:Yang, Liu (1); Mao, Zhihuai (1); Dong, Lanlan (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Mao, Z.
(maozhh@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:185-189
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Aimed to the problems of difficult installation and low measurement accuracy in high moisture, the grain moisture sensor has improved from the traditional parallel polar plate probe to plane polar plate probe. The plane polar probe with protect pole was used to decrease the affect of the stray capacitance and interference, and some critical parameters of the plane polar probe that influenced sensitivity and accuracy of the sensor were proposed. The finite element method was used to analyze the electric field and capacitance of the plane polar probe. The results showed that the relations between measurement depth of grain, capacitance of plane polar probe and the ratio of the width of probe's drive-plate to the clearance between two induction-plates, and the optimized size of the probe was obtained when the ratio was 0.9. Experimental result proved that maximum error for measuring moisture of the sensor was ±1.5%, measuring moisture ranged from 6% to 36%, and measuring temperature ranged from -10 to 80°C. This study contributes in optimizing the measurement accuracy and lowering the difficulty of installation of the plane polar probe.
Number of references:15
Main heading:Moisture control
Controlled terms:Capacitance - Electric fields - Finite element method - Measurements - Moisture meters - Probes - Sensors
Uncontrolled terms:Critical parameter - Grain moisture - High moisture - Maximum error - Measurement accuracy - Measuring temperature - Moisture probe - Moisture sensors - Stray capacitances
Classification code:944.1 Moisture Measuring Instruments - 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 - 944.2 Moisture Measurements - 921.6 Numerical Methods - 732.2 Control Instrumentation - 731.3 Specific Variables Control - 703.1 Electric Networks - 701.1 Electricity: Basic Concepts and Phenomena - 801 Chemistry
DOI:10.3969/j.issn.1002-6819.2010.02.032
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 6>
Accession number:20101512841274
Title:Visual design system in tractor axle based on B/S and C/S mode
Authors:Zheng, Quan (1); Chen, Liqing (1); Wang, Jixian (1)
Author affiliation:(1) College of Engineering, Anhui Agricultural University, Hefei 230036, China
Corresponding author:Wang, J.
(wangjixian@ahau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:179-184
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A visual design system in tractor axle based on B/S and C/S hybrid mode was developed, and the system function and technical flow of visual design were researched synthetically. The system has the functions of performance parameters design, optimal design of structure parameter, three-dimensional parametric design of parts, virtual assembly and network data query etc. The tractor axle visual design system was tested and confirmed through the concrete example. Practice indicated that the visual design system developed in this project was an effective measure to improve efficiency of engineering practical design.
Number of references:15
Main heading:Software design
Controlled terms:Axles - Computer software - Design - Tractors (agricultural) - Tractors (truck) - Wheels
Uncontrolled terms:Design softwares - Effective measures - Hybrid mode - Network data - Optimal design - Parametric design - Performance parameters - Structure parameter - System functions - Virtual assembly - Visual design
Classification code:902.1 Engineering Graphics - 821.1 Agricultural Machinery and Equipment - 723.5 Computer Applications - 723.1 Computer Programming - 723 Computer Software, Data Handling and Applications - 682.1.1 Railroad Cars - 663.2 Heavy Duty Motor Vehicle Components - 663.1 Heavy Duty Motor Vehicles - 662.4 Automobile and Smaller Vehicle Components - 601.2 Machine Components - 408 Structural Design
DOI:10.3969/j.issn.1002-6819.2010.02.031
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 7>
Accession number:20101512841250
Title:Application of improved ant colony clustering method in the delineation of site-specified irrigation management zones
Authors:Jiang, Qiuxiang (1); Fu, Qiang (1); Wang, Zilong (1)
Author affiliation:(1) College of Water Conservancy and Architecture Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Fu, Q.
(fuqiang@neau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:37-42
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 more efficiently applying field operation and management of precision irrigation, an improved ant colony clustering algorithm was used to delineate irrigation management zones. Ant colony algorithm with the characteristics of discreteness and parallelism is applicable to data feature clustering. However when the data quantity is huge, ant colony clustering will take long time on data search and cause high computational complexity in the process of system circulation. Thus, for the purpose of decreasing computational complexity and accelerating clustering, initial clustering center was taken as the initial food source in the paper to guide ant colony to reduce the blindness of ant walking. Soil physical properties were taken as the data sources. After principal components analysis was used to eliminate correlations among initial indexes, improved ant colony clustering was performed to delineate site-specified irrigation management zones. According to the comparison of delineation management zones between improved ant colony clustering and K-means clustering, management zones delineated by the former showed the features that soil physical properties had stronger uniformity within the subzone and more significant difference between subzones. Delineation result based on the improved ant clustering indicated that the study area could be partitioned into two irrigation management zones. Soil field capacity, saturation moisture content and permanent wilting point in Zone I were greater than those in Zone II, which indicated that soil in Zone I had stronger drought resistance than that in Zone II under the same climate conditions. Delineation of irrigation management zones could provide references and data support for site-specified irrigation management.
Number of references:22
Main heading:Cluster analysis
Controlled terms:Clustering algorithms - Computational complexity - Computational efficiency - Irrigation - Management - Optimization - Physical properties - Principal component analysis - Soils - Water supply systems
Uncontrolled terms:Ant clustering - Ant colonies - Ant colony algorithms - Ant colony clustering - Climate condition - Clustering centers - Data feature - Data quantity - Data searches - Data source - Data support - Drought resistance - Field capacity - Field operation - Food sources - Irrigation management - K-means clustering - Management zones - Permanent wilting points - Precision irrigation - Principal components analysis - Saturation moisture contents - Soil physical property - Study areas
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 903.1 Information Sources and Analysis - 912.2 Management - 921 Mathematics - 921.5 Optimization Techniques - 922 Statistical Methods - 922.2 Mathematical Statistics - 821.3 Agricultural Methods - 723 Computer Software, Data Handling and Applications - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 721 Computer Circuits and Logic Elements - 483.1 Soils and Soil Mechanics - 446.1 Water Supply Systems - 723.1 Computer Programming
DOI:10.3969/j.issn.1002-6819.2010.02.007
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 8>
Accession number:20101512841305
Title:Effects of pomegranate peel extract on keep-freshing of strawberry
Authors:Zhang, Lihua (1); Zhang, Yuanhu (1); Cao, Hui (1); Yang, Xuemei (1)
Author affiliation:(1) State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian 271018, China; (2) Department of Agrinomy, Zaozhuang Vocational College, Zaozhuang 277019, China
Corresponding author:Zhang, Y.
(yhzhang9@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:361-365
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 the new technique of strawberry fresh-keeping at room temperature and the effective use of pomegranate peel resources, fresh strawberry was immerged in 1.25% chitosan solution (T1), 1% pomegranate peel extract (T2), 1.25% chitosan with pomegranate peel extract (T3), and in distilled water as control, respectively. Weight loss rate, the decay rate, soluble solids content, titration acid content, MDA content and Vc content in strawberry were measured during storage periods at ambient temperature. Results showed that the rate of weight loss and rotten fruit and MDA content were reduced in three treatments, the declining rate of titration acid content, soluble solids content and Vc content were delayed, and T3 treatment gave the best effect, prolonged 1-2 days of storage time. Therefore, pomegranate peel extract for fresh strawberries is feasible, and the ideal effect is given by combining with appropriate concentration of chitosan liquid.
Number of references:17
Main heading:Fruits
Controlled terms:Acids - Agriculture - Chitin - Chitosan - Decay (organic) - Software architecture - Titration
Uncontrolled terms:Acid content - Ambient temperatures - Chitosan solution - Concentration of - Decay rate - Distilled water - Fruit storage - Ideal effects - Room temperature - Soluble solids content - Storage - Storage periods - Storage time - Weight loss - Weight loss rates
Classification code:821.4 Agricultural Products - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 811.2 Wood and Wood Products - 804.1 Organic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.2 Chemical Reactions - 801.2 Biochemistry - 801 Chemistry - 723.5 Computer Applications - 723.1 Computer Programming
DOI:10.3969/j.issn.1002-6819.2010.02.063
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 9>
Accession number:20101512841244
Title:Impact of climate change on agricultural water use and grain production in China
Authors:Wu, Pute (1); Zhao, Xining (1)
Author affiliation:(1) National Engineering Research Center for Water Saving Irrigation at Yangling, Institute of Soil and Water Conservation of Chinese Acad. of Sci., Northwest Agriculture and Forestry University, Yangling 712100, 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:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:1-6
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:Global climate warming is an indisputable objective fact, and it inevitably impacts agricultural water use and grain security production in China. In this paper, the Palmer drought severity index (PDSI), the gross irrigation quota (GIQ) and the per-hectare grain output (PHGO) were used as specific indexes of climate change, agricultural water use and grain production to analyze inter-annual variation characteristics and correlation between PDSI, GIQ, PHGO in China from 1949 to 2005, and a good linear correlation between PHGO during 1949-1983 and PDSI as well as GIQ during 1949-1990 was found, which indicated that climate change significantly affected agricultural water use and grain production, while human factors (technological progress, policies mechanisms, production inputs, etc.) affected relatively small at above-mentioned stage. According to the correlation, the GIQ and PHGO during 1949-2005 were predicted. It was found that predicted values and actual ones of the GIQ during 1949-1990 and the PHGO during 1949-1983 had poor relationships, which indicated that human factors (technological progress, policies mechanisms, production inputs, etc.) gradually became the leading position, and their average impact rate on agricultural water-saving and grain yield reached over 27% and 40%, respectively. The negative impact of climate change on agricultural water use and grain production can be mitigated to some extent by controlling the human factors as technological innovation, policy mechanisms protection as well as production inputs increment.
Number of references:22
Main heading:Climate change
Controlled terms:Agriculture - Biochemical oxygen demand - Grain (agricultural product) - Human engineering - Innovation - Technological forecasting - Water conservation - Water supply
Uncontrolled terms:Agricultural water - Agricultural water use - Global climate warming - Grain production - Grain security - Grain yield - Human factors - Interannual variation - Irrigation quotas - Linear correlation - Negative impacts - Objective facts - Palmer drought severity indices - Technological innovation - Technological progress
Classification code:912 Industrial Engineering and Management - 901.4 Impact of Technology on Society - 821.4 Agricultural Products - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 461.4 Ergonomics and Human Factors Engineering - 453 Water Pollution - 452.4 Industrial Wastes Treatment and Disposal - 452.2 Sewage Treatment - 451 Air Pollution - 446.1 Water Supply Systems - 444 Water Resources - 443.1 Atmospheric Properties - 403.1 Urban Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.02.001
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 10>
Accession number:20101512841268
Title:Seed and fertilizer intelligent gauging and monitoring system of suction precision seeder
Authors:Zhao, Bin (1); Kuang, Lihong (2); Zhang, Wei (2)
Author affiliation:(1) College of Information Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (2) College of Engineering, Heilongjiang Bayi Agricultural University, Daqing 163319, China
Corresponding author:Zhao, B.
(binzhaoxue@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:147-153
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:For solving the problems about automatic testing farming quality and quantity of large scale precision seeder, seed and fertilizer farming intelligent gauging and monitoring system was studied and designed. It can gauge the seeding rate and fertilizer rate, and monitor the blockage of seed and fertilizer spouts, or the emptying of seed and fertilizer boxes. Compared with the past study methods, the differences of the study were: it used indirect method to gauge the seeding rate and fertilizer rate, and to gauge farming area by two-wheel testing distance method. And photoelectric sensors array were used to monitor the blockage of seed and fertilizer spouts, and the emptying of seed and fertilizer boxes. It was installed on the 2BJM-9 precision seeder, and experimented in farm. The relative errors of seeding rate, fertilizer rate and farming area were less than 5%, 9.6%, 5.5%, respectively. The maximum relay time of alarming was 0.8 s. Field trial showed this method was practicable, and the monitoring effect was better. This system can realize to monitor whole course of precision seeders operating in all-weather.
Number of references:17
Main heading:Monitoring
Controlled terms:Agricultural machinery - Automatic testing - Fertilizers - Gages - Intelligent control - Seed - Sensor arrays
Uncontrolled terms:Distance method - Fertilizer rates - Field trial - Gauging - Indirect methods - Monitoring effect - Monitoring system - Photoelectric sensors - Relative errors - Seeding rate - Study methods
Classification code:821.2 Agricultural Chemicals - 821.4 Agricultural Products - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 943.3 Special Purpose Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 821.1 Agricultural Machinery and Equipment - 422 Strength of Building Materials; Test Equipment and Methods - 423 Non Mechanical Properties and Tests of Building Materials - 716 Telecommunication; Radar, Radio and Television - 723.4.1 Expert Systems - 731.1 Control Systems - 732 Control Devices - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2010.02.025
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 11>
Accession number:20101512841286
Title:Temporal-spatial variations of reference crop evapotranspiration in Anhui Province in recent 35 years supported by GIS
Authors:Wu, Wenyu (1); Ma, Xiaoqun (1); Chen, Xiaoyi (1); Yang, Taiming (1); Zhang, Aimin (1)
Author affiliation:(1) Anhui Meteorological Institute, Hefei 230031, China; (2) Anhui Province Atmospheric Science and Satellite Remote Sensing Key Laboratory, Hefei 230031, China
Corresponding author:Ma, X.
(maxiaoqun@tom.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:251-256
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The reference crop evapotranspiration is an important component of water resources. For studying its variation under the condition of climate change in Anhui Province, based on the meteorological data observed by 79 meteorological stations of Anhui Province during the period from 1971 to 2005, the values of evapotranspiration were calculated using the Penman-Monteith method recommended by the FAO in 1998. On this basis, a map of reference crop evapotranspiration distribution in Anhui Province was charted using the Kriging interpolation method. The results show that the spatial distribution of annual reference crop evapotranspiration in Anhui Province is strongly affected by many factors, such as the climatic and topographical factors, and the difference of annual reference crop evapotranspiration between the different localities is significant. Generally, it decreases from the northeast to the southwest, which is higher in plain, and lower in mountain. Temporally, it has been in a trend of "fluctuate-decrease" since 1971, and it was the highest at end of 1970 s. Seasonal reference crop evapotranspiration is in a sequence of summer>spring>autumn>winter. Monthly reference crop evapotranspiration is the highest during the period from May to August and lowest during the period from November to next February, while the highest value appears in July, and the difference between the different localilities is also significant.
Number of references:24
Main heading:Evapotranspiration
Controlled terms:Climate change - Crops - Geographic information systems - Information systems - Interpolation - Size distribution - Water supply
Uncontrolled terms:Anhui Province - Crop evapotranspiration - Kriging interpolation - Kriging methods - Meteorological data - Meteorological station - Penman-Monteith equations - Penman-Monteith method - Spatial distribution - Spatial variations - Spatiotemporal patterns
Classification code:821.4 Agricultural Products - 903.2 Information Dissemination - 903.3 Information Retrieval and Use - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids - 802.3 Chemical Operations - 423 Non Mechanical Properties and Tests of Building Materials - 443.1 Atmospheric Properties - 444.1 Surface Water - 446.1 Water Supply Systems - 451 Air Pollution - 531.2 Metallography - 723.3 Database Systems
DOI:10.3969/j.issn.1002-6819.2010.02.043
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 12>
Accession number:20101512841273
Title:Microstructure of the wear-resisting functional gradient borides materials on the agricultural machinery casting surface
Authors:Song, Yuepeng (1); Lü, Zhaoqin (1); Liu, Hongjie (3); Li, Jiangtao (2); Feng, Yuanyuan (1); Ji, Wenwen (1)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai'an 271018, China; (2) Technical Institute of Physics and Chemistry, Chinese Acad. of Sci., Beijing 100190, China; (3) College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China
Corresponding author:Song, Y.
(ustbsong@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:175-178
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 wear-resisting alloying layer on casting surface can be prepared by the surface alloying technique. However, the layer has obvious defects such as high hardness leading to difficultly machining, easily spalling because of low bonding strength between layer and matrix. Aimed at solving the problems, the blocks coated by different component of gradient powder layers using the principle of gradient composite design were prepared. Then wear-resisting functional gradient borides materials (FGMs) on HT200 cast iron's surface were formed, and their forming mechanism, microstructure and microhardness were studied. The results showed that the alloying layers were made up of transition region, middle wear-resisting layer and ingot particles sintering layer. Further study on the microstructure of middle wear-resisting layer indicated that high-hardness ferrochrome particles homogeneously scattered on the boride matrix, which its size affected the fusion of the materials. Application in slade showed that the service life of treated slade was increased more than 2.5 times comparing with that of untreated slade.
Number of references:14
Main heading:Surfaces
Controlled terms:Agricultural machinery - Alloying - Borides - Cast iron - Casting - Hardness - Materials - Microstructure - Sintering
Uncontrolled terms:Functional gradient - Surface alloying - Surface alloying technology
Classification code:951 Materials Science - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 812.1 Ceramics - 812.2 Refractories - 821.1 Agricultural Machinery and Equipment - 931 Classical Physics; Quantum Theory; Relativity - 933 Solid State Physics - 604.2 Machining Operations - 421 Strength of Building Materials; Mechanical Properties - 531.1 Metallurgy - 531.2 Metallography - 545.2 Iron Alloys - 533.1 Ore Treatment - 536.1 Powder Metallurgy Operations - 539.2.2 Protecting Materials - 534.2 Foundry Practice
DOI:10.3969/j.issn.1002-6819.2010.02.030
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 13>
Accession number:20101512841255
Title:Effects of check-dams on sediment storage-release in Chabagou Watershed
Authors:Zhang, Luan (1); Shi, Changxing (1); Zhang, Hao (3)
Author affiliation:(1) Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Acad. of Sci., Beijing 100101, China; (2) Graduate University of Chinese Acad. of Sci., Beijing 100049, China; (3) College of Information and Business, North University of China, Taiyuan 030051, China
Corresponding author:Shi, C.
(shicx@igsnrr.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:64-69
Language:English
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For clarifying the response of sediment yield to the strengthening of human interventions in the middle Yellow River, Chabagou Watershed was selected as the study area to explore the relationship between development of check-dams and dynamic of sediment storage-release both in time and space. Construction of check-dams in the Chabagou Watershed started in the late 1950s, speeded up swiftly in the 1960s and 1970s, and nearly stopped in the 1980s and 1990s. The results showed that most of eroded sediment was stored in the Chabagou Watershed in the 1980s, with a sediment delivery ratio of 0.325. The low sediment delivery ratio can be attributed to the check-dams, which can not only trap sediment, but also reduce the frequency and intensity of hyper-concentrated flow to a greater extent. However, it is worth noting that the storage capacity of check-dams in the Chabagou Watershed had been decreased significantly due to filling up of early built dams as well as slowdown of dam construction since the 1980s. Moreover, the potentiality of sediment release from destroyed dams is increasing as a result of low design standards and poor maintenance of existing dams. Therefore, the role of check-dams as soil and water conservation measures should be paid adequate attention in the future. It is necessary to strengthen construction and management of check-dams for maintaining and even promoting their sediment trapping capacity.
Number of references:16
Main heading:Clarification
Controlled terms:Carbon fiber reinforced plastics - Catchments - Dams - Dynamic response - Landforms - Leakage (fluid) - Sediment transport - Sediment traps - Sedimentology - Soil conservation - Soil mechanics - Soils - Water conservation - Watersheds
Uncontrolled terms:AS-soils - Concentrated flow - Dam construction - Design standard - Human intervention - Sediment delivery ratio - Sediment release - Sediment storage - Sediment trapping - Sediment yields - Storage capacity - Study areas - Time and space - Yellow river
Classification code:619.1 Pipe, Piping and Pipelines - 631.3 Flow of Fluid-Like Materials - 802.3 Chemical Operations - 483.1 Soils and Soil Mechanics - 817.1 Polymer Products - 822.2 Food Processing Operations - 943.3 Special Purpose Instruments - 821.3 Agricultural Methods - 481.1 Geology - 408.1 Structural Design, General - 415.2 Plastics Structural Materials - 441.1 Dams - 403.1 Urban Planning and Development - 444 Water Resources - 452.1 Sewage - 452.3 Industrial Wastes - 444.1 Surface Water
DOI:10.3969/j.issn.1002-6819.2010.02.012
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 14>
Accession number:20101512841293
Title:Biomass liquefaction by dielectric barrier discharge plasma
Authors:Wang, Qiuying (1); Gu, Fan (1)
Author affiliation:(1) School of Energy and Environment, Southeast University, Nanjing 210096, China
Corresponding author:Gu, F.
(fangu@seu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:290-294
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 a new way for fast biomass liquefaction in atmospheric pressure condition, the paper focused on the basis of dielectric barrier discharge plasma techniques. Liquefied experiments on some familiar biomass such as sawdust, stalk and rice hull, were performed on condition of low temperature and atmospheric pressure. Results of experiments showed that the method had a series of merits including fast chemical reaction, facile reaction condition, simple equipments, steady outcome composition and low causticity. It would be one of investigative directions for biomass liquefaction in the future.
Number of references:19
Main heading:Electric discharges
Controlled terms:Atmospheric chemistry - Atmospheric pressure - Biomass - Chemical reactions - Dielectric devices - Flow control - Liquefaction - Plasma applications - Plasma theory
Uncontrolled terms:Biomass liquefaction - Dielectric barrier discharge plasmas - Facile reaction - Low temperatures - Rice hulls
Classification code:932.3 Plasma Physics - 731.3 Specific Variables Control - 801.1 Chemistry, General - 802.2 Chemical Reactions - 802.3 Chemical Operations - 805.1.1 Biochemical Engineering - 821.5 Agricultural Wastes - 714 Electronic Components and Tubes - 704 Electric Components and Equipment - 701.1 Electricity: Basic Concepts and Phenomena - 631.1 Fluid Flow, General - 525.1 Energy Resources and Renewable Energy Issues - 443.1 Atmospheric Properties - 708.1 Dielectric Materials
DOI:10.3969/j.issn.1002-6819.2010.02.050
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 15>
Accession number:20101512841259
Title:Simulation of hydrological effects on subsurface drainage of substituting perennial grass for corn/soybean rotation in Corn-belt of USA
Authors:Luo, Wan (1); Sands, Gary R. (2); Jing, Weihua (1); Jia, Zhonghua (3)
Author affiliation:(1) Water Resources Research Institute, Xi'an University of Technology, Xi'an 710048, China; (2) Department of Bioproducts and Biosystems Engineering, University of Minnesota, Saint Paul, MN 55108, United States; (3) Environmental Research Institute, Xi'an University of Technology, Xi'an 710048, China
Corresponding author:Luo, W.
(wluo@mail.xaut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:89-94
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In the northern corn-belt of USA where agricultural drainage has been linked to excessive nitrogen loading to the Mississippi River, growing more perennial grasses has been proposed for bio-fuel production. This paper presents a simulation study on the hydrological effects on subsurface drainage of substituting perennial grasses for corn/soybean rotation in southern Minnesota. Long-term simulation with DRAINMOD based on 90 year weather records showed that higher consumptive uses of water by grasses may significantly reduce subsurface drainage discharge, especially in the years following prolonged dry period. The bio-drainage effect of grasses on drainage reduction is much more significant than engineering measures such as reducing drainage intensity by reducing drain depth or increasing drain spacing. Growing deep rooted perennial grasses may significantly reduce negative impact of subsurface drainage discharge on aquatic environment of the study area.
Number of references:25
Main heading:Drainage
Controlled terms:Groundwater flow - Hydrology - Natural water geochemistry - Rotation - Water
Uncontrolled terms:Agricultural drainage - Aquatic environments - Bio-drainage - Drain depth - Drain spacings - DRAINMOD - Hydrological effects - Hydrology models - Long term simulation - Minnesota - Mississippi river - Negative impacts - Nitrogen loading - Perennial grass - Simulation studies - Study areas - Subsurface drainages
Classification code:804.2 Inorganic Compounds - 631.1 Fluid Flow, General - 601.1 Mechanical Devices - 502 Mines and Quarry Equipment and Operations - 481.2 Geochemistry - 931.1 Mechanics - 471 Marine Science and Oceanography - 444 Water Resources - 442 Flood Control; Land Reclamation - 406 Highway Engineering - 401 Bridges and Tunnels - 444.2 Groundwater
DOI:10.3969/j.issn.1002-6819.2010.02.016
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 16>
Accession number:20101512841282
Title:Calibration method of leaf wetness sensor for cucumber in solar greenhouse
Authors:Li, Ming (1); Zhao, Chunjiang (2); Li, Daoliang (1); Wang, Cheng (2); Yang, Xinting (2)
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; (3) Key Laboratory for Information Technologies in Agriculture, Ministry of Agriculture, Beijing 100097, China
Corresponding author:Yang, X.
(yangxt@nercita.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:224-230
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 Leaf Wetness Duration (LWD) is a key input factor of disease warning systems for crops in solar greenhouse. The leaf wetness sensors could automatically monitor LWD in real time. Since the interactions between microclimate and crops influence LWD, leaf wetness sensors should be calibrated in solar greenhouse conditions. In this study, the calibration method of leaf wetness sensor was developed with mini cucumber at fruit harvesting stage, and the experiment was conducted in the solar greenhouse during late summer and early autumn. The leaf wetness sensors were oriented at a 45° angle, and firstly the sensors was misted with water from a pipette, and then they were attached to the wet leaves. In these two different conditions, the dry/wetness threshold was determined. The monitoring results of different sensor deployments were compared, which included attaching to leaf margins, tips and lower surface and placing below the leave. The effects of rainy or non-rainy conditions on the measurement results were also investigated. The results showed that the dry/wetness threshold of "6" was obtained by attaching the sensors to the wet leaves, in this case, the monitoring effects were good and the errors were around 1 h; when the sensors were attached to leaf margins and tips, the monitoring accuracy (fraction of correct estimates) was around 0.75-0.83; furthermore, the monitoring effects in non-rainy conditions were better than rainy conditions. The results indicate that the calibration method for leaf wetness sensors can be used for monitoring leaf wetness duration of cucumber and meet the requirement of cucumber disease early warning system in solar greenhouse.
Number of references:23
Main heading:Greenhouses
Controlled terms:Alarm systems - Calibration - Crops - Drilling - Monitoring - Sensors - Solar heating
Uncontrolled terms:Calibration method - Cucumber disease - Early Warning System - Fruit harvesting - Key input - Leaf wetness - Leaf wetness durations - Measurement results - Monitoring accuracy - Monitoring effect - Rainy conditions - Real time - Sensor deployment - Solar greenhouse - Warning systems
Classification code:821.6 Farm Buildings and Other Structures - 902.2 Codes and Standards - 914.1 Accidents and Accident Prevention - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 914.2 Fires and Fire Protection - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 821.4 Agricultural Products - 801 Chemistry - 402.1 Industrial and Agricultural Buildings - 604.2 Machining Operations - 642.1 Process Heating - 643.1 Space Heating - 657.1 Solar Energy and Phenomena - 732.2 Control Instrumentation
DOI:10.3969/j.issn.1002-6819.2010.02.039
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 17>
Accession number:20101512841248
Title:Effects of field rainwater harvesting by plastic mulch and complement irrigation on soil water and yield of winter wheat
Authors:Li, Qiaozhen (1); Li, Yuzhong (1); Guo, Jiaxuan (2); Liu, Xiaoying (1); Xu, Chunying (1)
Author affiliation:(1) Laboratory of Dryland Agriculture, MOA, Institute of Environment and Sustainable Development in Agriculture, CAAS, Beijing 100081, China; (2) Department of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
Corresponding author:Li, Y.
(Liyz@cjac.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:25-30
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 field experiment conducted in year 2005-2006 at Changping District, Beijing, the effects of field rainwater harvesting by plastic mulch and the complementary irrigation on the soil moisture and yield of winter wheat were studied. Results showed that under the complementary irrigation treatment, soil moisture was improved significantly and water consumption increased by 45.8% in contrast to the control, while by 29%-39% in contrast to the treatment of rainwater harvesting by plastic mulch for the soil profile with depth of 1.6 m. Meanwhile, the yield was 1.63-1.95 times to the control, while increased by 32%-58% in contrast to the treatment of field rainwater harvesting by plastic mulch. In addition, for the treatment of combination with plastic mulch and irrigation, the corresponding yield almost changed nothing. Under the condition of the rainfall closed to the half of normal level and plastic mulch area reached 40% of the total planting area, soil moisture within profile of 1.6 m depth was improved and water consumption increased by 3.68%-12.23%, while, the deep soil water utilization was 1.55-1.69 times to the control, and the yield of winter wheat increase by 63%-95%. The water production efficiency in the soil profile with depth of 1 m increased by 55.8%-73.8%. For the same consideration of plastic mulch, spring top-dressing had the better effect for keeping the soil water content at seeding stage than fall fertilizer and basal fertilizer. In conclusion, both spring top-dressing with plastic mulch during irrigation and complementary irrigation can greatly increase yield, and improve capacity of drought resistance. So it is worth expanding in drought area of North China.
Number of references:17
Main heading:Plastics
Controlled terms:Drought - Fertilizers - Harvesting - Irrigation - Moisture control - Moisture determination - Rain - Soil moisture - Underwater soils - Water content - Water supply
Uncontrolled terms:Complementary irrigation - Field rainwater harvesting - Rain water harvesting - Water consumption - Winter wheat
Classification code:944.2 Moisture Measurements - 821.3 Agricultural Methods - 821.2 Agricultural Chemicals - 817.1 Polymer Products - 804 Chemical Products Generally - 731.3 Specific Variables Control - 483.1 Soils and Soil Mechanics - 471.1 Oceanography, General - 446.1 Water Supply Systems - 444 Water Resources - 443.3 Precipitation
DOI:10.3969/j.issn.1002-6819.2010.02.005
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 18>
Accession number:20101512841296
Title:Analysis on spatial structural characteristics of land use of Beijing City
Authors:He, Yingbin (1); Chen, Youqi (1); Li, Zhibin (3); Yao, Yanmin (1); Tang, Pengqin (3)
Author affiliation:(1) Key Laboratory of Resources Remote Sensing and Digital Agriculture, Ministry of Agriculture, Beijing 100081, China; (2) Hulunber Grassland Ecosystem Observation and Research Station, Beijing 100081, China; (3) Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Corresponding author:Chen, Y.
(chenyqi@mail.caas.net.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:313-318
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:Analysis on spatial structure characteristics of land use is very significant for reasonable land use in the future of Beijing, where was the study area. This paper, from landscape, economic and ecological points of view, expounded spatial structure characteristics of land use of Beijing. And a series of indexes such as land use diversity, land use extent, economic density and ecological value were applied to analyze the spatial structure characteristics of land use for the year 2006. These indexes were all gridded with 1 km×1 km cells to detect spatial heterogeneity. The results showed that land use category of Beijing was complete in 2006. The land use, cover diversity index and the land use extent index turned out to be gradually increasing from the mountainous regions in northwest Beijing to the plain regions in southeastern part. The average land economic density of Beijing for 2006 was 47.97×10<sup>6</sup> RMB/km<sup>2</sup>. Meanwhile, the economic density of forestland was minimum, on the contrary, that of urban and town characterized by concentration and aggregation was maximum. The total ecosystem services value for the study area was 13 488.13×10<sup>6</sup> RMB with the average of 0.82×10<sup>6</sup> RMB/km<sup>2</sup>, which was a little bit higher than the national average level. Authors suggested efficiency and effectiveness of land use need to be further improved to make land use of Beijing more sustainable.
Number of references:17
Main heading:Economics
Controlled terms:Ecosystems - Land use
Uncontrolled terms:Beijing - Beijing city - Diversity index - Ecosystem services value - Forest land - Land use diversity - Mountainous regions - Spatial characteristics - Spatial heterogeneity - Spatial structure - Structural characteristics - Study areas
Classification code:403 Urban and Regional Planning and Development - 442.2 Land Reclamation - 454.3 Ecology and Ecosystems - 911.2 Industrial Economics - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2010.02.054
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 19>
Accession number:20101512841297
Title:Effect of gangue spontaneous combustion on reclaimed soil quality of large-scaled opencast mine in loess area
Authors:Fan, Wenhua (1); Li, Huifeng (1); Bai, Zhongke (3); Qiao, Junyao (1); Xu, Jianwei (1)
Author affiliation:(1) College of Resource and Environmental Science, Shanxi Agricultural University, Taigu 030801, China; (2) College of Continued Education, Xianyang Normal University, Xianyang 712000, China; (3) School of Land Science and Technique, China University of Geosciences, Beijing 100083, China
Corresponding author:Bai, Z.
(baizk@cugb.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:319-324
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 researching the effect of gangue spontaneous combustion on reclaimed soil quality, soil physical and chemical properties, contents of heavy metals, soil microbe and enzyme activities were studied by taking soils having been reclaimed for 13 years as objects, which located in south refuse dump of Antaibao large-scaled opencast mine in Pingshuo County, Shanxi Province, and original geomorphologic soil was chosen as the references. The results showed that the physical properties of reclaimed soil were influenced by gangue spontaneous combustion significantly. Compared with normal platform and original geomorphologic soils, bulk density of gangue spontaneous reclaimed soil was lower and total porosity was higher. Non-capillary porosity in 0-20 cm and 20-40 cm layers of gangue spontaneous combustion reclaimed soil were up to 42.08% and 39.49%, respectively, which were much higher than that of normal platform and original geomorphologic soils. However, capillary porosity in 0-20 cm and 20-40 cm layers of gangue spontaneous combustion reclaimed soil were 16.41% and 15.60%, respectively. Field water-holding capacity in 0-20 cm and 20-40 cm layers of gangue spontaneous combustion reclaimed soil were only 14.92% and 13.11%, which were 47.76% and 39.95% of that of normal platform, respectively. Contents of organic matter, rapidly available phosphorus and soil pH value were decreased and content of readily available potassium was increased due to gangue spontaneous combustion. The mass fractions of Hg, Pb and Cr, especially Hg and Cr were increased significantly. Total microorganism in gangue spontaneous reclaimed soil was 0.82% less than that of normal platform reclaimed soil. The amount of bacteria, actinomycetes and fungi were 0.80%, 1.64%, 1.24% of that of normal platform reclaimed soil, respectively. The activities of catalase and invertase were decreased and urease was increased slightly in gangue spontaneous combustion reclaimed soil as compared to normal platform reclaimed soil. In a word, gangue spontaneous combustion caused reclaimed soil extreme deterioration and decreased reclaimed soil quality.
Number of references:31
Main heading:Spontaneous combustion
Controlled terms:Bacteria - Chemical properties - Chromium - Geomorphology - Land reclamation - Lead - Mercury (metal) - Mining - Phosphorus - Porosity - Potassium - Smoke - Soils - Wastewater reclamation
Uncontrolled terms:Available phosphorus - Bulk density - Capillary porosity - Loess area - Mass fraction - Opencast mine - Organic matter - Reclaimed soil - Refuse dump - Soil microbes - Soil pH - Soil physical and chemical properties - Soil quality - Total porosity - Water holding capacity
Classification code:543.1 Chromium and Alloys - 546.1 Lead and Alloys - 549.1 Alkali Metals - 549.3 Others, including Bismuth, Boron, Cadmium, Cobalt, Mercury, Niobium, Selenium, Silicon, Tellurium and Zirconium - 801 Chemistry - 801.2 Biochemistry - 801.3 Colloid Chemistry - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids - 521.1 Fuel Combustion - 423 Non Mechanical Properties and Tests of Building Materials - 442.2 Land Reclamation - 451.1 Air Pollution Sources - 452.4 Industrial Wastes Treatment and Disposal - 454.2 Environmental Impact and Protection - 461.9 Biology - 481.1.1 Geomorphology - 483.1 Soils and Soil Mechanics - 502.1 Mine and Quarry Operations
DOI:10.3969/j.issn.1002-6819.2010.02.055
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 20>
Accession number:20101512841276
Title:Application of ensemble empirical mode decomposition in failure analysis of rotating machinery
Authors:Dou, Dongyang (1); Zhao, Yingkai (2)
Author affiliation:(1) School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China; (2) School of Automation and Electrical Engineering, Nanjing University of Technology, Nanjing 210009, China
Corresponding author:Dou, D.
(ddy41@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:190-196
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 suppressing the phenomenon of mode mixing in empirical mode decomposition (EMD) and increasing the analysis accuracy, an improved algorithm named ensemble empirical mode decomposition (EEMD) was presented. A moderate Gauss white noise generated randomly was added to the original signal, which changed the local time span of the signal and rendered the analysis scales of EMD in a trial different from the others. By sufficient trials, considering as extracting the nature of the signal from different aspects, an ensemble mean of certain intrinsic mode function (IMF) decomposed by the EMD method was output as the final result of the new algorithm. The IMF eliminated bad effects of artificial noise, and indicated clearly the intrinsic processes of the signal with full of real meanings. EEMD method was validated by both simulation experiment and real rub-impact case, and then was compared with basic EMD algorithm and high-frequency-harmonic method. The results showed that EEMD was more precise but a little time-consuming, EEMD has good prospects of application in failure analysis of rotating machinery.
Number of references:24
Main heading:Quality assurance
Controlled terms:Acoustic signal processing - Failure analysis - Rotating machinery - Rotation
Uncontrolled terms:Analysis accuracy - Artificial noise - EMD method - Empirical mode decomposition - Ensemble empirical mode decomposition - Ensemble empirical mode decomposition (EEMD) - Gauss white noise - Harmonic method - High frequency HF - Improved algorithm - Intrinsic mode functions - Intrinsic process - Local time - Mode mixing - Original signal - Rub-impact - Simulation experiments
Classification code:421 Strength of Building Materials; Mechanical Properties - 601.1 Mechanical Devices - 751 Acoustics, Noise. Sound - 913.3 Quality Assurance and Control - 921 Mathematics - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2010.02.033
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 21>
Accession number:20101512841303
Title:Machine recognition of citrus variety based on the fractal dimensions of perimeter-area
Authors:Cao, Leping (1)
Author affiliation:(1) Educational Affairs Department, Hunan Biological and Electromechanical Polytechnic, Changsha 410127, China
Corresponding author:Cao, L.
(clp4218@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:351-355
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:Citrus fruit variety recognition is an important issue for automated operations including diseases and insect pests prevention and cure, fertilization management and fruit picking. In order to evaluate the feasibility of automatic recognition of various fruits, samples of the citrus unshiu Marc.cv. unbergii Nakai, Skaggs Bonanza Navel orange and Luxi seedless Ponkan were studied. Images of calyx surfaces and the profile were acquired from sample fruits. Pixel numbers of fruit image contour and region were used as the perimeters and areas of fruits, and fractal dimensions of fruits were obtained by the perimeter-area method. Perimeters, areas and fractal dimensions were taken as the character values of three varieties of citrus fruits. A wavelet neural network model was presented to recognize different type of fruits based on these character values. The results showed that the correctnesses of the citrus unshiu Marc.cv. unbergii Nakai, Skaggs Bonanza Navel orange and Luxi seedless Ponkan were 95%, 95%, 97.5%, respectively. From the results we conclude that these three cultivars of citrus fruits can be automatically recognized and have a high correctness with three character values.
Number of references:16
Main heading:Fractal dimension
Controlled terms:Fruits - Image processing - Imaging systems - Initiators (chemical) - Neural networks - Partial discharges - Plants (botany)
Uncontrolled terms:Area method - Automated operations - Automatic recognition - Character values - Citrus - Citrus fruit - Identification - Image contour - Insect pest - Machine recognition - Navel orange - Prevention and cure - Variety recognition - Wavelet neural network model - Wavelet neural networks
Classification code:821.4 Agricultural Products - 803 Chemical Agents and Basic Industrial Chemicals - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 921 Mathematics - 723.4 Artificial Intelligence - 701.1 Electricity: Basic Concepts and Phenomena - 461.9 Biology - 461.1 Biomedical Engineering - 723.2 Data Processing and Image Processing
DOI:10.3969/j.issn.1002-6819.2010.02.061
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 22>
Accession number:20101512841251
Title:Experiment on fertilizer suction performance of three hydraulic driven pumps
Authors:Han, Qibiao (1); Wu, Wenyong (1); Liu, Honglu (1); Huang, Xingfa (2); Hao, Zhongyong (1)
Author affiliation:(1) Beijing Hydraulic Research Institute, Beijing 100048, China; (2) College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China; (3) Farm Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China
Corresponding author:Liu, H.
(liuhonglu@yeah.net)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:43-47
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 ensuring the rationality of fertigation device choice of head system in micro-irrigation, experiments on the fertilizer suction performances of three hydraulic driven pumps were carried out and the analysis on the influencing factors of the inlet flow rate and the suction amount were took place. The results showed that: the inlet flow rate of the hydraulic driven pump was related with the pressure difference between the inlet and outlet, but not related with the inlet pressure. The regression models of the inlet flow rate of the three pumps were established and the curves of three pumps varied as power function, the logarithmic equation and the quadratic function, respectively. What caused this situation was the pressure difference when they began to work and the different performance when they worked in the little pressure difference. The suction amount of the hydraulic driven pump was related with the inlet discharge and the pressure difference. The pumps could work badly with a large inlet flow or a high inlet pressure. So when the pump works, the inlet flow should not be higher than the design discharge, especially at the small fertilizer proportion. Based on the analysis, the regression models of fertilizer suction amount with inlet discharge and pressure difference were established. These can be used for the calculation of the fertilizer suction amount. Meanwhile, the three pumps worked nearly accord to the fertilizer proportion, but there were difference slightly.
Number of references:14
Main heading:Inlet flow
Controlled terms:Fertilizers - Hydraulics - Intake systems - Pumps - Regression analysis
Uncontrolled terms:Design discharge - Fertigations - Influencing factor - Inlet - Inlet pressures - Logarithmic equations - Microirrigation - Power functions - Pressure differences - Quadratic function - Regression model - Suction performance - With inlets
Classification code:618.2 Pumps - 631.1 Fluid Flow, General - 632.1 Hydraulics - 804 Chemical Products Generally - 821.2 Agricultural Chemicals - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2010.02.008
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 23>
Accession number:20101512841257
Title:Simulation experiments on soil moisture evaporation affected by calcic nodule contents
Authors:Zhu, Yuanjun (1); Shao, Ming'an (1)
Author affiliation:(1) Institute of Soil and Water Conservation, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Zhu, Y.
(zhuyuanjun@foxmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:77-81
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The effect of calcic nodule content on soil moisture evaporation process was investigated in soil columns with uniform water supplement by simulating soil containing calcic nodules on the Northern Loess Plateau. Its aim was to provide an experimental base for estimation and modeling of soil water balance in this soil on the Loess Plateau. The results indicated that the differences in cumulative evaporation between soils with different calcic nodule mass fractions (calcic nodule mass/(calcic nodule mss + soil mass)) were little during the initial seven days and then increased a bit in the next days. There were not obvious differences in soil moisture evaporation rates during the experimental period. Soil moisture evaporation decreased with the increasing of calcic nodule mass fraction in soils. When calcic nodule mass fraction reached 0.5, soil moisture evaporation amount decreased by 8 mm, accounting for 10% of total soil water content. The negative relationship between soil moisture evaporation and calcic nodule content could be attributed to the decrease of soil water content resulting from the increase of calcic nodule content. The impacts of calcic nodules on soil moisture evaporation should be attributed to water absorption capacity of calcic nodule and its content as well as water allocation between soil and calcic nodules.
Number of references:16
Main heading:Water content
Controlled terms:Evaporation - Moisture determination - Soil moisture - Underwater soils - Water absorption
Uncontrolled terms:Loess Plateau - Mass fraction - Simulation experiments - Soil column - Soil mass - Soil water balance - Soil water content - Water absorption capacity - Water allocations
Classification code:444 Water Resources - 471.1 Oceanography, General - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2010.02.014
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 24>
Accession number:20101512841291
Title:Performance of cooking stoves with biomass pellet fuel
Authors:Fan, Xinxin (1); Lü, Zi'an (2); Li, Dingkai (2); Yu, Xiaoli (1)
Author affiliation:(1) Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China; (2) Key Laboratory of Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
Corresponding author:Fan, X.
(fxxwx32@gmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:280-284
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:Biomass pellet fuel as a clean fuel, it needs to design special stoves to make them burning more efficient and cleanly. It will present three kinds of pellets-fired original stoves for cooking of farmer households in this paper. Performances of the stoves, such as thermal efficiency, combustion characteristics, and pollutants in flue gas are experimentally studied. The biomass pellet fuel is corn stalks in the course of the trial. The test procedure is according to the national standard GB4363-1984 which method is water heating test. The experimental results show that these stoves can use the pellet fuel which is made from the agricultural and forest residues more efficiently and clearly. Then, the thermal efficiency and pollutants in flue gas of the new cooking stove, which is improved in accordance with the results of the cooking stove that with a mini-fan for the wind, satisfy the level and limits of the local standard in Beijing DB11/T 540-2008.
Number of references:15
Main heading:Stoves
Controlled terms:Biomass - Combustion - Flue gases - Fuels - Ore pellets - Pelletizing - Pollution - Smoke
Uncontrolled terms:Biomass combustion - Biomass pellets - Clean fuel - Combustion characteristics - Corn stalk - Forest residue - National standard - Test procedures - Thermal efficiency - Water heating
Classification code:533.1 Ore Treatment - 642.2 Industrial Furnaces and Components - 643.2 Space Heating Equipment and Components - 821.5 Agricultural Wastes - 801.3 Colloid Chemistry - 804 Chemical Products Generally - 805.1.1 Biochemical Engineering - 802.3 Chemical Operations - 525.1 Energy Resources and Renewable Energy Issues - 524 Solid Fuels - 451.1 Air Pollution Sources - 454.2 Environmental Impact and Protection - 521 Fuel Combustion and Flame Research - 521.1 Fuel Combustion - 522 Gas Fuels - 523 Liquid Fuels
DOI:10.3969/j.issn.1002-6819.2010.02.048
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 25>
Accession number:20101512841261
Title:Variation of groundwater salinity and its influence on crops in irrigation area of Northwest China
Authors:Sun, Yue (1); Mao, Xiaomin (1); Yang, Xiuying (2); Tong, Ling (1); Tang, Minhua (1)
Author affiliation:(1) Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China; (2) Institute of Water Conservancy Science Research in Wuwei, Wuwei 733000, China
Corresponding author:Mao, X.
(maoxiaomin@tsinghua.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:103-108
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:Temporal and spatial variations of groundwater salinity in irrigation area are important factors affecting the quality of local groundwater resources and crop growth, especially in the irrigation area that relies on groundwater supply. In this study, the data of groundwater salinity was collected from 21 irrigation areas of the Shiyang River Basin from 1981 to 2003 and interpolated using inverse distance weighting (IDW) method. After considering the impact of natural and social activity in these 20 years, the variation of groundwater salinity was analyzed. The results showed that average annual groundwater salinity in the basin tended to increase generally, and it also increased gradually from upstream to downstream area, the same with its annual fluctuations. The influence of groundwater salinity change on the safety of crop growth and the suitable planting area of the two typical crops (spring wheat and cotton) were also analyzed. The suitable planting areas of both crops tended to decrease slightly. And this study implies the importance of monitoring and control of groundwater salinity in the arid irrigation area that depends on groundwater.
Number of references:14
Main heading:Groundwater resources
Controlled terms:Crops - Groundwater - Irrigation - Rivers - Salinity measurement - Watersheds
Uncontrolled terms:Crop growth - Downstream areas - Groundwater supply - Inverse distance weighting - Inverse distance weighting method - Irrigation area - Monitoring and control - NorthWest China - River basins - Salinity change - Social activities - Spring wheat - Temporal and spatial variation
Classification code:943.3 Special Purpose Instruments - 821.4 Agricultural Products - 821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 471.4 Seawater, Tides and Waves - 444.2 Groundwater - 444.1 Surface Water - 444 Water Resources - 407.2 Waterways
DOI:10.3969/j.issn.1002-6819.2010.02.018
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 26>
Accession number:20101512841284
Title:Estimating LAI and CCD of rice and wheat using hyperspectral remote sensing data
Authors:Yang, Feng (1); Fan, Yamin (2); Li, Jianlong (1); Qian, Yurong (1); Wang, Yan (1); Zhang, Jie (1)
Author affiliation:(1) School of Life Science, Nanjing University, Nanjing 210093, China; (2) Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China
Corresponding author:Li, J.
(jlli2008@nju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:237-243
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 aim of this study was to measure the changes of the canopy spectral reflectance, LAI and CCD of rice and wheat in different growth period, to analyze the correlation between hyperspectral vegetation indices, LAI and CCD, and to confirm the optimum vegetation indices for estimating LAI and CCD of rice and wheat. The result showed the change trend of LAI was similar with CCD, that is, the values increased at first and then decreased, but the time for maximum value of CCD and that of LAI in rice and wheat appeared at different growth stage; In near infrared region, the canopy spectral reflectance gradually increased at rice and wheat earlier growing stage, and then decreased gradually in late growth stage. The maximum value appeared around heading stage and filling stage, respectively. Comparison with the correlations among 14 vegetation indices, LAI and CCD, the modified soil adjusted vegetation index (MSAVI2) was significantly correlated with LAI and CCD in rice, and the correlation coefficients were more than 0.91. For wheat, the spectral reflectance at 800 nm (R<inf>800</inf>) was highly correlated with LAI and CCD, the correlation coefficients were higher than 0.92. Linear regression models were built for estimating LAI and CCD of rice and wheat using the MSAVI2 and R<inf>800</inf>, the determination coefficients were more than 0.85 (R<sup>2</sup>>0.85). These results provided an insight for monitoring the dynamics of crop and scientific management of agricultural production under different growth environment (irrigation- and rain-fed forming).
Number of references:25
Main heading:Vegetation
Controlled terms:Agriculture - Chlorophyll - Digital cameras - Estimation - Porphyrins - Reflection - Regression analysis - Remote sensing
Uncontrolled terms:Agricultural productions - Canopy spectral reflectance - Correlation coefficient - Determination coefficients - Filling stage - Growth period - Growth stages - Highly-correlated - HyperSpectral - Hyperspectral remote sensing data - Linear regression models - Maximum values - Near infrared region - Rice - Scientific management - Spectral reflectances - Vegetation index
Classification code:922.2 Mathematical Statistics - 921 Mathematics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 801.2 Biochemistry - 742.2 Photographic Equipment - 741.1 Light/Optics - 731.1 Control Systems - 711 Electromagnetic Waves - 525.1 Energy Resources and Renewable Energy Issues - 461.9 Biology
DOI:10.3969/j.issn.1002-6819.2010.02.041
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 27>
Accession number:20101512841304
Title:Prediction model of shelf life of Trichiurus haumela using an electric nose
Authors:Tong, Yi (1); Xie, Jing (1); Xiao, Hong (1); Yang, Shengping (1)
Author affiliation:(1) College of Food Science, Shanghai Ocean University, Shanghai 201306, China
Corresponding author:Xie, J.
(jxie@shou.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:356-360
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:An electric nose was used to evaluate the quality of the Trichiurus haumela under different storage periods and storage temperatures. The raw data of the Trichiurus haumela of the electric nose analysis were analyzed by principal compounds analysis (PCA) and shelf life (SL). The Q<inf>10</inf> model of the Trichiurus haumela by applying both chemical (TVBN assays) and olfactometric (e-nose) methods was developed. The results showed that the sample stored at 273 K and 283 K could be well discriminated by 18 Metal Oxide Sensors. Changes in total volatile base-nitrogen (TVBN) and total viable count (TVC) of Trichiurus haumela with respect to different storage time and temperatures conformed to the first kinetic model with highly regression coefficients (R<sup>2</sup>>0.9). Shelflife function of Alphasoft11.0 and Arrhenius kinetic model were developed to predicted the shelf life of Trichiurus haumela. It showed from the reliability assessment between predicted and observed shelf-life that relative error was within 20% calculated by the prediction model for the shelf-life of Trichiurus haumela. The remaining shelf-life of Trichiurus haumela can be predicted at the storage temperatures from 268 to 293 K by using Q<inf>10</inf> model.
Number of references:15
Main heading:Principal component analysis
Controlled terms:Dynamic models - Kinetic theory - Metallic compounds - Nitrogen - Odors - Quality control - Reliability analysis
Uncontrolled terms:Arrhenius kinetics - Basic nitrogen - Electric nose - Kinetic models - Metal oxide sensors - Prediction model - Regression coefficient - Relative errors - Reliability assessments - Shelf life - Storage periods - Storage temperatures - Storage time - Total becteria nitrogen - Total viable counts
Classification code:922.2 Mathematical Statistics - 921 Mathematics - 913.3 Quality Assurance and Control - 913 Production Planning and Control; Manufacturing - 804.2 Inorganic Compounds - 931.1 Mechanics - 804.1 Organic Compounds - 453.1 Water Pollution Sources - 452.1 Sewage - 451.1 Air Pollution Sources - 422.2 Test Methods - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2010.02.062
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 28>
Accession number:20101512841249
Title:Scheme of water saving irrigation in autumn based on SHAW model in Inner Mongolia Hetao irrigation district
Authors:Li, Ruiping (1); Shi, Haibin (1); Akae, Takeo (2); Zhang, Yiqiang (3); Zhang, Xiaohong (4); Flerchinger, G.N. (5)
Author affiliation:(1) College of Water Conservation and Civil Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China; (2) Faculty of Environmental Science and Technology, Okayama University, Okayama 700-85303, Japan; (3) Inner Mongolia Hetao Irrigation District Jiefangzha Department, Hangjin Houqi 015400, China; (4) General Administration of Inner Mongolia Hetao Irrigation District, Linhe 015000, China; (5) Northwest Watershed Research Center, Agricultural Research Service, United States Department of Agriculture, Boise ID83712-7166, United States
Corresponding author:Shi, H.
(shi_haibin@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:31-36
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 accordance with the prevention of soil salination and water-saving irrigation in autumn in Inner Mongolia Hetao irrigation district, the reasonable water-saving irrigation scheme in autumn was quantificationally established by using SHAW model in theory, which aimed at the different salinized soils. For slight salinized soils, autumn irrigation quota was from 142 to183 mm between September 28 and October 23. For moderate salinized soils, autumn irrigation quota was from 180 to 200 mm between October 14 and 18. For serious salinized soils, planting sunflower instead of wheat, autumn irrigation quota was from 200 to 225 mm. In the studied irrigation district, autumn irrigation is supposed to be reasonably arranged according to the different salinized soils.
Number of references:19
Main heading:Irrigation
Controlled terms:Freezing - Geologic models - Soils - Thawing - Water conservation
Uncontrolled terms:Inner Mongolia - Irrigation districts - Irrigation quotas - Salination - Shaw model - Simultaneous heat and water model - Water models - Water-saving irrigation
Classification code:822.2 Food Processing Operations - 821.3 Agricultural Methods - 802.3 Chemical Operations - 644.1 Refrigeration Methods - 619.1 Pipe, Piping and Pipelines - 483.1 Soils and Soil Mechanics - 481.1 Geology - 444 Water Resources - 403.1 Urban Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.02.006
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 29>
Accession number:20101512841263
Title:Simulation on simple algorithm of rainfall erosivity in purple hilly area
Authors:Shi, Dongmei (1); Lu, Xiping (2); Jiang, Guangyi (3)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing 400716, China; (2) Hydraulic Science Research Institute of Sichuan Province, Chengdu 610072, China; (3) Monitoring Station of Soil and Water Conservation and Ecological Environment, Chongqing 401147, China
Corresponding author:Shi, D.
(shidm_1970@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
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:The rainfall erosivity factor is an important parameter to quantitatively evaluate potential water erosion risk and its serious consequence in a special area. In this article, some simple algorithm of rainfall erosivity was built up by field artificial rainfall experiment in purple hilly area. The results in purple hilly area showed that: Runoff and sediment had significantly positive correlation with rainfall. Sediment was highly influenced by such period-rainfall intensity features as 5, 10, 15, 30 and 45 min rainfall intensity. Some compound factors as ∑EI<inf>5</inf> and ∑EI<inf>10</inf> based on rainfall kinetic energy and period-rainfall intensity could reflect the varying process of runoff in slope erosion, ∑EI5 could reflect the varying process of sediment at same time. Some compound factors as PI<inf>5</inf>, PI<inf>10</inf>, PI<inf>15</inf> based on rainfall amount and period-rainfall intensity are the important factors affecting the varying process of runoff t and sediment in slope erosion in purple hilly area, especially PI<inf>5</inf> is the most important factor affecting soil erosion process. The models with PI<inf>5</inf> and ∑EI<inf>5</inf> as dependent variables respectively could be chosen as simple algorithm of rainfall erosivity factor in purple hilly area, and the transformed relationship between these above models is, ∑EI<inf>5</inf> = 24.16 (PI<inf>5</inf>), which can greatly improves the practical application of rainfall erosivity factor in these soil erosion predicting models such as universal soil loss equation (USLE) and revised universal soil loss equation (RUSLE). For a special rainfall event in purple hilly area, such period-rainfall intensity features as 5, 10 and 15 min are critical to reduce soil erosion and to increase exploitation of soil and water resources. Some precipitation features as 5 min rainfall intensity and its rainfall amount, raindrop distribution can take more important role for water and soil loss of slope land in purple hilly area.
Number of references:19
Main heading:Soil conservation
Controlled terms:Algorithms - Experiments - Geologic models - Rain - Runoff - Sediment transport - Sedimentology - Soil mechanics - Soils - Water resources
Uncontrolled terms:Artificial rainfall - Artificial rainfall experiment - Dependent variables - Hilly areas - Positive correlations - Predicting models - Rainfall erosivity - Rainfall event - Rainfall intensity - Rainfall kinetic energy - Revised universal soil loss equations - SIMPLE algorithm - Slope erosion - Soil and water - Soil erosion - Soil loss - Universal soil loss equation - Water erosion
Classification code:921 Mathematics - 901.3 Engineering Research - 821.3 Agricultural Methods - 723 Computer Software, Data Handling and Applications - 631.3 Flow of Fluid-Like Materials - 483.1 Soils and Soil Mechanics - 481.1 Geology - 444.1 Surface Water - 444 Water Resources - 443.3 Precipitation - 442.1 Flood Control
DOI:10.3969/j.issn.1002-6819.2010.02.020
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 30>
Accession number:20101512841287
Title:Solid biofuel standard system in China
Authors:Zhang, Bailiang (1); Ren, Tiaobao (1); Xu, Guizhuan (1); Li, Baoqian (1)
Author affiliation:(1) Key Laboratory of Renewable Energy of Ministry of Agriculture, Henan Agriculturally University, Zhengzhou 450002, China
Corresponding author:Zhang, B.
(hauzblo@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:257-262
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to promote the development of Chinese solid biofuel industry, the China solid biofuel standard system was studied in this paper. The research on the production and distribution status of the solid biofuel industry in China and overseas, including the study on the overseas congeneric solid biofuel standard system, had been reported in detail. The necessity and urgency of constructing China solid biofuel standard system were expounded. The guiding principles to construct China solid biofuel standard system were proposed, and the detailed suggestions on the sketch and the contents of the standard system were illuminated.
Number of references:30
Main heading:Biofuels
Controlled terms:Standardization
Uncontrolled terms:Guiding principles - Solid bio-fuels - Standard system
Classification code:523 Liquid Fuels - 524 Solid Fuels - 902.2 Codes and Standards
DOI:10.3969/j.issn.1002-6819.2010.02.044
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 31>
Accession number:20101512841281
Title:Nitrogen nutrition diagnosis for corn using different spectral parameters
Authors:Wang, Lei (1); Bai, Youlu (1); Lu, Yanli (1); Wang, He (1)
Author affiliation:(1) Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Corresponding author:Bai, Y.
(ylbai@caas.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:218-223
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 the field of crop nutrition diagnosis by spectrum technology, it is greatly important that selecting right spectrum parameters to improve accuracy and precision. The objectives of this experiment were to identify wavelengths and/or their combinations that are indicative of nitrogen nutritional condition and to analyze the accuracy of different forms spectral parameters for nitrogen nutrition diagnosis. Corn (Zea may L.) different layer leaf reflectance spectra and nitrogen content of different nitrogen treatments were measured at key development stages. Correlation analysis between spectral reflectance of different layer leaf and nitrogen content were made and linear regression equations were constructed between spectral parameters and nitrogen content. The accuracy of nitrogen nutrition diagnosis among the single wave-band spectral reflectance(R), the logarithm of single wave-band spectral reflectance(LgR), the dual wave-bands spectral reflectance (R<inf>1</inf>+R<inf>2</inf>), and the logarithm of dual wave-bands spectral reflectance (LgR<inf>1</inf>+LgR<inf>2</inf>) were compared. The results showed that the high negative correlativity between the 6th expanded leaf spectral reflectance and nitrogen content was existed in visible spectrum region. The fittings of the linear regression equation constructed by spectra variables (LgR<inf>550</inf>+LgR<inf>720</inf>, Lg(R<inf>550</inf>+R<inf>720</inf>)) and nitrogen content respectively were best among them. Sensitive leaves to nutrient profit and loss should be chosen to be regarded as nutrition diagnosis objects of spectral detection in different stages. Spectral sensitive bands to nitrogen nutrition varied with development stages, so more bands of high correlation and more reliable spectral parameters should be selected to construct models with nutrient elements. The results showed that after the logarithm treatment on spectral parameters, whatever either single band or dual bands, the precision of the regression equation was improved and its stability was strengthened. Its observations suggest that it is great potential that using spectral parameters to make nutritional diagnosis for crops, and more suitable spectral parameters or vegetation index for nutritional diagnosis should be investigated and selected. So more research still need to be conducted to test and improve crop nitrogen diagnosis model.
Number of references:17
Main heading:Plasma diagnostics
Controlled terms:Algebra - Crops - Nitrogen - Nutrients - Nutrition - Profitability - Reflection - Regression analysis - Vegetation
Uncontrolled terms:Accuracy and precision - Construct models - Correlation analysis - Crop nitrogen - Development stages - Diagnosis model - Dual Band - Linear regression equation - Nitrogen content - Nitrogen nutrient - Nitrogen nutrition - Nitrogen treatment - Nutrient elements - Nutrition diagnosis - Nutritional conditions - Profit and loss - Reflectance spectrum - Regression equation - Single band - Spectral detection - Spectral parameters - Spectral reflectances - Spectrum parameters - Vegetation index - Visible spectra - Zea mays
Classification code:821.2 Agricultural Chemicals - 821.4 Agricultural Products - 822.3 Food Products - 911.2 Industrial Economics - 921.1 Algebra - 922.2 Mathematical Statistics - 932.3 Plasma Physics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 454.3 Ecology and Ecosystems - 461.7 Health Care - 461.9 Biology - 525.1 Energy Resources and Renewable Energy Issues - 711 Electromagnetic Waves - 741.1 Light/Optics - 804 Chemical Products Generally
DOI:10.3969/j.issn.1002-6819.2010.02.038
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 32>
Accession number:20101512842359
Title:Dehumidification and regeneration efficiency of the mixed salt solution in the solar dehumidification system
Authors:Ding, Tao (1); Huang, Zhidong (1); Zhao, Weijin (3); Li, Baoming (1)
Author affiliation:(1) College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China; (2) Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture the People's Republic of China, Beijing 100083, China; (3) Zhejiang Tianxi Group Company, Lishui 321400, China
Corresponding author:Li, B.
(libm@cau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:295-299
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The technology of liquid desiccant and solar regeneration is the key technical problems of evaporative cooling in high temperature and humidity region, and the most important thing is the dehumidification/regeneration efficiency. The calculating relationship between the humidity content of in/out air and dehumidification efficiency was established through the experimental measurement. And the relationships of temperature of regeneration heat source to regeneration quality, diffusion coefficient and regeneration efficiency were researched. The results showed that with the regeneration temperature increasing, the regeneration quality, diffusion coefficient and regeneration efficiency were rising. When the regeneration temperature was 104°C, the regeneration quality was 10 g/kg, diffusion coefficient 0.277 cm<sup>2</sup>/s, and regeneration efficiency 55%. But when the regeneration temperature was lower 50°C, the regeneration cannot work. So the effective temperature regeneration was at least 70°C in solar energy mixed solution dehumidification system. Based on the Chung model, the calculation formula of dehumidification efficiency in the multistage cross flow dehumidifier was established for the solar energy dehumidification system, and the dehumidification efficiency was 56.8%. This research for greenhouse facilities dehumidifying technology provides a study basic.
Number of references:21
Main heading:Humidity control
Controlled terms:Diffusion - Evaporative cooling systems - Moisture - Solar energy - Solar radiation
Uncontrolled terms:Calculation formula - Cross flows - Dehumidification efficiency - Dehumidification system - Dehumidification/regeneration - Diffusion Coefficients - Effective temperature - Evaporative cooling - Experimental measurements - Heat sources - High temperature - Humidity content - Liquid desiccant - Mixed salts - Mixed solution - Regeneration - Regeneration efficiency - Regeneration temperature - Solar dehumidification system - Solar regeneration - Technical problem
Classification code:931.1 Mechanics - 801.4 Physical Chemistry - 657.1 Solar Energy and Phenomena - 644.3 Refrigeration Equipment and Components - 643.4 Air Conditioning Equipment and Components - 643.3 Air Conditioning - 615.2 Solar Power - 443.1 Atmospheric Properties - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2010.02.051
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 33>
Accession number:20101512841299
Title:Effects of ultra-high pressure thawing on San Huang chicken quality by different frozen mothods
Authors:Liao, Caihu (1); Rui, Hanming (1); Zhang, Liyan (1); Yin, Bi (1); Chen, Yudan (1)
Author affiliation:(1) College of Light Industry and Food Science, South China University of Technology, Guangzhou 510640, China
Corresponding author:Rui, H.
(RHMLSY@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:331-337
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 methodology and technique used for freezing and thawing play a very important role in the preservation of the quality of frozen San Huang chicken. Studies were conducted on the influence of San Huang chicken at different freezing manners (refrigerator freezing, air freezing, immersion freezing) and thawing patterns (traditonal thawing, high pressure thawing) in this paper. The indexes including drip loss, color, texture, protein denaturation. The variables to freeze San Huang chicken sample were pressure (100, 150, 200 MPa). The temperature of pressure medium was controlled at 20°C. The results showed that high pressure thawing pattern could shorten the thawing time, but result in more drip loss than traditional thaw and had a significant differences (P<0.05). Contrary to expectation, the immersion freezing process produced much higher drip loss than other freezing manners. Minimum drip loss was observed at 150 MPa rather than at 100 or at 200 MPa. L*, b*, ΔE had an apparent increase after high pressure process rather than traditional thawing pattern and had a significant difference (P<0.05), and significant differences (P<0.05) in L*, b*, ΔE values were found between the different pressures,with the increase of pressure, L*, b*, ΔE values increased. Hardness, springiness and chewiness increased after high pressure process rather than traditional thawing pattern. Salt-soluble protein content and actomyosin ATPase activities had a noticeable decrease during the high pressure thawing process and with significant difference (P<0.05). High pressure above 100 MPa, 150 MPa caused noticeable myosin heads, actin denaturation, respectively, during the high pressure thawing pattern,the denaturation degree of sarcoplasmic protein was much smaller than that of myosin and actin. DH<inf>peak I+II+III</inf> values had a noticeable decrease and with significant difference (P<0.05) during the high pressure thawing process. High pressure thawing pattern could shorten the thawing time, but the indexes of frozen San Huang chicken still has a large difference with fresh. The conclusion would be very obvious that the method of high pressure thawing in San Huang chicken isn't suitable.
Number of references:20
Main heading:Thawing
Controlled terms:Denaturation - Food processing - Freezing - Meats - Proteins
Uncontrolled terms:ATP-ase activity - Chicken - Drip loss - Freezing and thawing - High pressure - High pressure process - Immersion freezing - Methodology and techniques - Pressure medium - Protein denaturation - Sarcoplasmic protein - Soluble proteins - Ultrahigh pressure
Classification code:822.2 Food Processing Operations - 804.1 Organic Compounds - 802.3 Chemical Operations - 822.3 Food Products - 801.2 Biochemistry - 619.1 Pipe, Piping and Pipelines - 461.9 Biology - 644.1 Refrigeration Methods
DOI:10.3969/j.issn.1002-6819.2010.02.057
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 34>
Accession number:20101512841307
Title:Technology of preparation of calcium lactate from eggshell
Authors:Li, Fengzhen (1); Ma, Meihu (2); Li, Yanpo (2); Chen, Yaquan (1)
Author affiliation:(1) College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China; (2) College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (3) Department of Bioengineering, Hunan Environment Biological Polytechnic, Hengyang 421005, China
Corresponding author:Ma, M.
(mameihuhn@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:370-374
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, calcium lactate was made from eggshell. The eggshell was properly shattered, the lactate was added in to react with eggshell to prepare calcium lactate by direct reaction. The factors in the reaction were studied, and the optimal reaction condition was obtained. The results of regression-orthogonal combination experiment were analyzed by significance analysis. The results showed that the optimum conditions were: adding eggshell powder 10 g, lactic acid 18.5 mL, distilled water 100 mL, and the reaction temperature 35°C, reaction time 2 h, the yield of calcium lactate can reach 79.23% and the content is 86.93% in the optimal condition. Preparation calcium lactate in this way could not only utilize the potential of the eggshell but also solve the environmental pollution problem caused by the eggshell.
Number of references:18
Main heading:Calcium alloys
Controlled terms:Agricultural wastes - Calcium - Food additives - Lactic acid - Organic acids - Water content
Uncontrolled terms:Calcium lactate - Direct reactions - Distilled water - Eggshell - Environmental pollution problem - Optimal conditions - Optimal reaction condition - Optimum conditions - Reaction temperature - Reaction time - Significance analysis
Classification code:822.3 Food Products - 821.5 Agricultural Wastes - 804.1 Organic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 549.2 Alkaline Earth Metals - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.02.065
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 35>
Accession number:20101512841253
Title:PILCs as water-transmitting material and application in planting trees in drought areas
Authors:Zhang, Zengzhi (1); Wang, Botao (1); Zhang, Dawei (1); Xu, Haifeng (1)
Author affiliation:(1) Research Institute of Ecological and Functional Material, China University of Mining and Technology (Beijing), Beijing 100083, China; (2) School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Corresponding author:Wang, B.
(wwbbtt840207@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:54-58
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:Clay-based water-transmitting materials were proposed in order to solve the problems of dry soil layer and watering during forest planting in drought areas. The pillared interlayered clay was prepared in the presence of primary bentonite. The conductivity property was investigated under various conditions of cross-linking agent ratio. The structural aspects and thermal degradation of composites were also studied by means of XRD, TG and porosity analysis. The results indicated that pillared clays modified by Al crosslinking agent exhibit higher conductivity properties remarkably. Larger specific surface area, more pores and complicated pore structures play vital roles in the enhancement of the conductivity property. This kind of material can obviously elevate water from subsurface layer in drought areas so as to improve the survival rate of the seedlings.
Number of references:15
Main heading:Clay
Controlled terms:Agriculture - Aluminum - Crosslinking - Drought - Moisture determination - Soil moisture - Thermogravimetric analysis - X ray diffraction
Uncontrolled terms:Al cross-linking agent - Cross linking agents - Pillared inter-layered clays - Pillared interlayered clays (PILCs) - Survival rate - Water conductivity
Classification code:933.1.1 Crystal Lattice - 931.3 Atomic and Molecular Physics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 812.1 Ceramics - 802.2 Chemical Reactions - 944.2 Moisture Measurements - 801 Chemistry - 483.1 Soils and Soil Mechanics - 444 Water Resources - 443.3 Precipitation - 414.2 Brick Materials - 541.1 Aluminum
DOI:10.3969/j.issn.1002-6819.2010.02.010
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 36>
Accession number:20101512841289
Title:Heating system of biogas digester by ground-source heat pump
Authors:Shi, Huixian (1); Wang, Tao (1); Zhu, Hongguang (1); Li, Yongming (1); Rong, Ling (1); Pei, Xiaomei (1)
Author affiliation:(1) Modern Agricultural Science and Engineering Institute, Tongji University, Shanghai 200092, China; (2) College of Mechanical Engineering, Tongji University, Shanghai 200092, China
Corresponding author:Zhu, H.
(zhuhg@mail.tongji.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:268-273
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Biogas is one of the renewable energies which is suitable for rural area in China. For improving the lower biogas production in winter, with several heating method analyzed, a heating system of biogas digester was developed, in which the heat energy was supplied by hot water from ground-source heat pump. An experiment was carried out at a medium scale pig farm. The research results showed that this system could guarantee the fermentation temperature at (32±2)°C, and the biogas productivity at 0.6 m<sup>3</sup>/(m<sup>3</sup>·d), sometimes even at 1.1 m<sup>3</sup>/(m<sup>3</sup>·d). During the experiment, the average coefficient of performance (COP) of the ground-source heat pump unit was about 3.6, the average COP of the overall heating system about 2.7, and the primary energy ratio could reach 0.84. Compared with electrothermal film heating system, it could save 63% of electricity and the present value of investment benefit was increased to 40 188.5 yuan. And compared with hot-water boiler which burns fossil fuels, a better environment could be guaranteed without pollution. Therefore this system was feasible in technology and economy, simultaneously in favor of environmental protection and energy saving. In all, this system has the potential to develop.
Number of references:15
Main heading:Biogas
Controlled terms:Economics - Experiments - Fermentation - Fossil fuels - Heat pump systems - Heating - Heating equipment - Investments - Pumps - Rural areas - Water
Uncontrolled terms:Biogas digesters - Biogas fermentation - Biogas production - Coefficient of performance - Energy saving - Fermentation temperature - Ground-source heat pump - Heat energy - Heating method - Heating system - Hot water - Investment benefit - Present value - Primary energy ratios - Renewable energies - Research results
Classification code:643.2 Space Heating Equipment and Components - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 805.1.1 Biochemical Engineering - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes - 901.3 Engineering Research - 901.4 Impact of Technology on Society - 911.2 Industrial Economics - 971 Social Sciences - 643.1 Space Heating - 403.2 Regional Planning and Development - 444 Water Resources - 461.8 Biotechnology - 522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 616.1 Heat Exchange Equipment and Components - 618.2 Pumps - 641.2 Heat Transfer - 642.1 Process Heating - 642.2 Industrial Furnaces and Components
DOI:10.3969/j.issn.1002-6819.2010.02.046
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 37>
Accession number:20101512841271
Title:Numerical simulation on three-dimensional turbulence air flow of 9R-40 rubbing and breaking machine based on Fluent software
Authors:Wang, Juan (1); Wang, Chunguang (1); Wang, Fang (1)
Author affiliation:(1) College of Mechanical and Electricity Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China
Corresponding author:Wang, C.
(wcgjdy@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:165-169
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 studying the principle, property and law of air disturbulance noise produced by rubbing and breaking machine, the three dimensional inner flow fields were simulated with Fluent software. The simulated results could directly show its properties and state of the flow fields. Comparing numerical simulation curves with experiment data, the maximum relative error was less than 8%. The distributions of pressure and velocity of flow fields were obtained from the simulated results under the condition of rotating rate at 2800 r/min. By analyzing the simulated results of flow field, both rotation noise and eddy current noise were produced when the low-speed airflow from inlet was affected by high-speed rotating rotor. In addition, a reversed flow was formed in the outlet, which could cause a block and produce noise.
Number of references:14
Main heading:Flow simulation
Controlled terms:Agriculture - Computational fluid dynamics - Computational methods - Computer software - Flow fields - Inlet flow - Machinery - Rotation - Three dimensional
Uncontrolled terms:Agriculture machinery - Air flow - Experiment data - FLUENT software - High-speed - Inner flow field - Maximum relative errors - Numerical simulation - Reversed flow - Rotating rates - Simulated results - Three-dimensional turbulence
Classification code:931.1 Mechanics - 921.6 Numerical Methods - 921 Mathematics - 902.1 Engineering Graphics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 631.1.2 Gas Dynamics - 631.1.1 Liquid Dynamics - 631.1 Fluid Flow, General - 601.1 Mechanical Devices - 601 Mechanical Design
DOI:10.3969/j.issn.1002-6819.2010.02.028
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 38>
Accession number:20101512841301
Title:Effects of electron beam irradiation on the fungi inhibition during storage and processing quality of bulk wheat
Authors:Huang, Man (1); Hu, Bijun (1); Wu, Xinlian (2); Wen, Qibiao (1)
Author affiliation:(1) College of Light Industry and Food Science, South China University of Technology, Guangzhou 510640, China; (2) Sinograin Guangdong Xinshagang Depot, Dongguan 523147, China
Corresponding author:Wen, Q.
(lfqbwen@scut.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:342-346
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:Effects of the different doses of electron beam irradiation (EBR) on the inhibition of microbial colonies during wheat storage, as well as some main storing indicators and processing quality of wheat were inverstigated. The investigation result demonstrated that EBR could effectively inhibit the total number of microbial colonies in wheat (P<0.01), the higher the dose, the less the colonies. Inhibitory effects of different doses of irradiation on mold were significant (P<0.01). The sensory quality and basic nutritional componments of wheat irradiated with doses of 0-5.1 kGy did not change much. Dough rheological properties showed that, in addition to the settling time and the break-up time slightly increased with the increase of the dose, the evaluation value was negatively correlated with the degree of softening. Other changes of the indicators sucn as water absorption and formation time of flour dough were not very obvious. However, gluten index, α-amylase activity declined rapidly with the high-dose exposure. The falling number of wheat sample with 5.1 kGy-dose irradiation fell by 56.12% than that of the control. Taste score of steamed bread products also decreases with increase of the radiation dose.
Number of references:15
Main heading:Radiation
Controlled terms:Electron beams - Irradiation - Microorganisms - Optical disk storage - Rheology - Water absorption
Uncontrolled terms:Amylase activity - Break-up - Dose irradiation - Electron beam irradiation - Flour doughs - High dose - Inhibitory effect - Microbial colony - Processing quality - Radiation dose - Rheological property - Sensory qualities - Settling time
Classification code:741.3 Optical Devices and Systems - 801.2 Biochemistry - 802.3 Chemical Operations - 931.1 Mechanics - 931.3 Atomic and Molecular Physics - 932 High Energy Physics; Nuclear Physics; Plasma Physics - 932.1 High Energy Physics - 741.1 Light/Optics - 461.9 Biology - 622.2 Radiation Effects - 631.1 Fluid Flow, General - 657.1 Solar Energy and Phenomena - 711 Electromagnetic Waves - 711.1 Electromagnetic Waves in Different Media - 722.1 Data Storage, Equipment and Techniques
DOI:10.3969/j.issn.1002-6819.2010.02.059
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 39>
Accession number:20101512841280
Title:Design of wireless sensor network system based on in-field soil water content monitoring
Authors:Li, Zhen (1); Wang, Ning (2); Hong, Tiansheng (1); Wen, Tao (1); Liu, Zhizhuang (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agricultural Machinery and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China; (2) Department of Biosystems and Agricultural Engineering, Oklahoma State University, 111 Ag Hall, Stillwater, 74078, United States
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:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:212-217
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For finding a way to retrieve, transmit and store data in large-scale, full-coverage soil water content monitoring, a wireless sensor network system was developed and tested. The system was composed of ten sensor nodes, one central node to collect data from the sensor nodes and one base node connected to a PC to retrieve, store, and present the data. Soil water contents at four depths, i.e., 5.00, 15.24, 30.48 and 60.96 cm below soil surface, were continuously monitored. TinyOS and ZigBee were applied as operation system and communication protocol, respectively. EC-5 low-power and low-cost soil moisture sensor was applied. Solar powering module met the energy requirements of both sensor and central nodes. Packet delivery rate (PDR) experiment results indicated that, overall, a stable data transmission was achieved since 7 out of 10 sensor nodes' PDR were higher than 90% and another one was 89.2%. Due to manufacturing imperfection, two sensor nodes' PDR was lower than 70%. This problem was fixed by replacing powering circuits of the two nodes.
Number of references:16
Main heading:Water content
Controlled terms:Agriculture - Communication - Electric network synthesis - Moisture control - Sensor networks - Sensor nodes - Soil moisture - Solar energy - Telecommunication equipment - Underwater soils - Wireless sensor networks
Uncontrolled terms:Base nodes - Communication protocols - Data transmission - Energy requirements - In-field - Low Power - Operation system - Packet Delivery - Precision agriculture - Soil moisture sensors - Soil surfaces - Soil water content - Wireless sensor - Zig-Bee
Classification code:944.2 Moisture Measurements - 718 Telephone Systems and Related Technologies; Line Communications - 722 Computer Systems and Equipment - 722.3 Data Communication, Equipment and Techniques - 722.4 Digital Computers and Systems - 731.1 Control Systems - 731.3 Specific Variables Control - 732 Control Devices - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 717 Optical Communication - 444 Water Resources - 471.1 Oceanography, General - 483.1 Soils and Soil Mechanics - 716.3 Radio Systems and Equipment - 615.2 Solar Power - 703.1.2 Electric Network Synthesis - 716 Telecommunication; Radar, Radio and Television - 657.1 Solar Energy and Phenomena
DOI:10.3969/j.issn.1002-6819.2010.02.037
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 40>
Accession number:20101512841269
Title:Low-temperature experiment on starting system of ISAD hybrid diesel engine
Authors:Wei, Changhe (1); Wang, Zhong (1); Wang, Yucheng (1); Tang, Ting (2)
Author affiliation:(1) School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China; (2) Wuxi Diesel Engine Works, The First Auto Work Jiefang Automotive Company Ltd., Wuxi 214026, China
Corresponding author:Wei, C.
(weichanghe114@sina.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:154-159
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:According to starting performance of hybrid diesel engine of ISAD technology at low temperature, the match relationship among starting resistance torque, ISG motor power and storage battery capacitance was summarized, and influence of battery capacity was studied, which were as related to resistance torque, minimum start-up speed, electrical operating characteristics, electric transmission coefficient and thermal effects. The experiment result shows that, as far as the environment temperature decreases -5°C, starting resistance torque increases 2.5 N·m; starting resistance torque increases 3-8 N?m when the rotating speed increases 50 r/min. Studies have shown that, the first fire speed of ISAD diesel engine was increased, which was up to more than 350 r/min. The starting time from 0 to fire was 0.5 s, while the idle time was only 3.1 s, which was shorter than the original diesel engine, and fluctuations in speed was small.
Number of references:17
Main heading:Starting
Controlled terms:Damping - Diesel engines - Electric batteries - Electric power supplies to apparatus - Engines - Experiments - Speed - Starters - Torque
Uncontrolled terms:Battery capacity - Electric transmission - Environment temperature - First fire - Idle time - Integrated starter alternator damper (ISAD) - Integrated starter alternators - Low temperature - Low temperatures - Motor power - Operating characteristics - Rotating speed - Start-ups - Starting performance - Starting systems - Storage battery
Classification code:661.2 Automotive Engine Components - 702.1 Electric Batteries - 705.1 Electric Machinery, General - 931.2 Physical Properties of Gases, Liquids and Solids - 713.5 Other Electronic Circuits - 901.3 Engineering Research - 931.1 Mechanics - 715.2 Industrial Electronic Equipment - 661.1 Automotive Engines - 654.2 Rocket Engines - 421 Strength of Building Materials; Mechanical Properties - 612 Engines - 612.1.1 Internal Combustion Engine Components - 612.2 Diesel Engines - 617 Turbines and Steam Turbines - 617.3 Steam Engines
DOI:10.3969/j.issn.1002-6819.2010.02.026
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 41>
Accession number:20101512841266
Title:Effects of regulated deficit irrigation and nitrogen nutrition on validity of water and nitrogen in maize rootzone soil
Authors:Liu, Xiaogang (1); Zhang, Fucang (2); Yang, Qiliang (1); Li, Zhijun (2); Wu, Lifeng (2)
Author affiliation:(1) Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650024, China; (2) Key Lab. of Agricultural Soil and Water Eng. in Arid and Semiarid Areas of Ministry of Education, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Zhang, F.
(zhangfc@nwsuaf.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:135-141
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The objective of this study was to explore the effects of regulated deficit irrigation and nitrogen nutrition on validity of water and nitrogen in maize rootzone soil with pot experiment. The influence of regulated deficit irrigation and nitrogen nutrition on dynamics of NO<inf>3</inf><sup>-</sup>-N in rootzone soil and validity of water and nitrogen were studied. Results showed that soil NO<inf>3</inf><sup>-</sup>-N content was determined by N rate, and the dynamics of NO<inf>3</inf><sup>-</sup>-N in rootzone soil was affected by irrigation amount and nutrient uptake in each growing stage. Soil NO<inf>3</inf><sup>-</sup>-N contents in middle and lower soil layer of regulated deficit irrigation were at between that of low and high irrigation amount of normal irrigation, and there was a positive correlation between the content of NO<inf>3</inf><sup>-</sup>-N in middle and lower soil layer and N rate at the end of heading stage. N rate and water deficit period had a notably significant effect on accumulative dry matter and total nitrogen. Water deficit at jointing stage affected accumulative dry matter mostly, followed by that at seedling stage, and the least at heading stage. The treatment with high nitrogen rate and water deficit at seedling stage had the maximum water use efficiency; the treatment with high nitrogen rate had the maximum total nitrogen accumulation, which was 2.54-3.23 times of that in the treatment of zero nitrogen. The nitrogen apparent using efficiency under regulated deficit irrigation and low nitrogen was greater than 30%, which was 6.6% more than that under regulated deficit irrigation and high nitrogen. The best coupling treatment was water deficit at heading stage and low nitrogen.
Number of references:22
Main heading:Nitrogen
Controlled terms:Irrigation - Nutrition - Plants (botany) - Soils - Water recycling - Water supply
Uncontrolled terms:Coupling treatment - Dry matters - High-nitrogen - N content - Nitrogen nutrition - Nitrogen transport - Nitrogen-use efficiency - Nutrient uptake - ON dynamics - Positive correlations - Pot experiment - Regulated deficit irrigation - Soil layer - Total nitrogen - Transport - Water deficits - Water use efficiency - Water-water
Classification code:821.3 Agricultural Methods - 804 Chemical Products Generally - 483.1 Soils and Soil Mechanics - 461.9 Biology - 822.3 Food Products - 461.7 Health Care - 446.1 Water Supply Systems - 445.1 Water Treatment Techniques - 444 Water Resources - 453.2 Water Pollution Control
DOI:10.3969/j.issn.1002-6819.2010.02.023
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 42>
Accession number:20101512841279
Title:Image segmentation algorithm of touching rice kernels based on active contour model
Authors:Yang, Shuqin (1); Ning, Jifeng (2); He, Dongjian (1)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) College of Information Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) Research Center of Agricultural Equipment Engineering and Technology of Shaanxi, Yangling 712100, China
Corresponding author:He, D.
(hdj168@nwsuaf.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:207-211
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A new segmentation method based on active contour model was proposed in this paper and was applied to segmenting touching rice kernels in an image. Firstly, the local minimums were detected in the Euclidean distance transform of the binary image of the rice kernels. Those local minimums were merged by the morphologic dilation operator, so that one kernel corresponded to one region. Then, the edges of those regions were taken as initial curves and converged to the true boundary of the rice kernels in the image under the guidance of active contour model. The experimental results showed that the proposed segmentation algorithm based on active contour model got desirable segmentation. Its segmentation accuracy for round glutinous rice, non-glutinous rice, long glutinous rice and black rice reached 93.4%, 92.4%, 88.0% and 90.4%, respectively. That was, its overall accuracy achieved 91.05%, which was 26.7% more than that of the watershed based method. Therefore, the algorithm based on active contour model provides an effective means to separate the touching rice kernels in an image.
Number of references:18
Main heading:Image segmentation
Controlled terms:Algorithms - Digital image storage - Edge detection - Grain (agricultural product) - Imaging systems - Landforms - Mathematical models - Mathematical operators - Watersheds
Uncontrolled terms:Active contour model - Dilation operators - Distance transform - Distance transforms - Euclidean distance transforms - Glutinous rice - Image segmentation algorithm - Initial curve - Local minimums - Rice kernels - Segmentation accuracy - Segmentation algorithms - Segmentation methods
Classification code:741 Light, Optics and Optical Devices - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 751.1 Acoustic Waves - 821.4 Agricultural Products - 921 Mathematics - 723.5 Computer Applications - 444.1 Surface Water - 481.1 Geology - 716 Telecommunication; Radar, Radio and Television - 722.1 Data Storage, Equipment and Techniques - 722.4 Digital Computers and Systems - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing
DOI:10.3969/j.issn.1002-6819.2010.02.036
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 43>
Accession number:20101512841294
Title:Evaluation method of land-scaled consolidation potential based on landscape pattern principle
Authors:Wu, Lianglin (1); Luo, Jianping (3); Li, Man (1)
Author affiliation:(1) Faculty of Resources and Environment, Guangxi Teachers' College, Nanning 530001, China; (2) School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510275, China; (3) Planning Institute of Land and Resources of Guangxi, Nanning 530021, China
Corresponding author:Wu, L.
(wulianglin99@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:300-306
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 purpose of land consolidation includes to increase land quantity, to enhance land quality and production efficiency. Scalced land management is a main way of enhancing land production efficiency, and it is also the demand of modern scaled agriculture development. The paper focused on discussing a quantitative method for evaluating land scaled consolidation potential (LSCP) using indices including landscape pattern indices such as: patch area, richness index, patch square index, concentration index and terrain indices. The study provided a new method to regional land consolidation planning. By taking the arable land evaluation in the Karst mountain area in Guangxi Zhuang Autonomous Region as a study example, the landscape pattern indices and terrain indices were used combing with GIS technology to evaluate the LSCP in the region. The study results showed that the LSCP comprehensive index of most villiges and towns in Karst mountian areas in Duan Countiy was very low, and the index of the villiges and towns in the river vallvey areas was relative high. The LSCP comprehensive index of the river valley region was 0.85, which was five times more than that of the Karst peak cluster-depressions and Karst peak forest-valley region. The LSCP is strongly restricted by the combination of the spatial landscape pattern of land resource and the terrain characters.
Number of references:18
Main heading:Landforms
Controlled terms:Environmental engineering - Land use - Planning - Regional planning
Uncontrolled terms:Agriculture development - Arable land - Concentration indices - Evaluation Method - GIS technology - Guangxi - Land consolidation potential - Land managements - Land quality - Land resources - Land scaled consolidation - Landscape pattern - Landscape pattern indices - Patch area - Peak clusters - Production efficiency - Quantitative method - River valley
Classification code:403 Urban and Regional Planning and Development - 403.2 Regional Planning and Development - 442.2 Land Reclamation - 454 Environmental Engineering - 481.1 Geology - 912.2 Management
DOI:10.3969/j.issn.1002-6819.2010.02.052
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 44>
Accession number:20101512841277
Title:Vibration characteristic test of liquid-structure interaction on rectangular liquid-storage structure
Authors:Cheng, Xuansheng (1); Zhou, Zhi (1); Shi, Xiaoyu (1)
Author affiliation:(1) School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Corresponding author:Cheng, X.
(cxs702@lut.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:197-201
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 obtaining the vibration characteristic of liquid-structure interaction system on rectangular liquid-storage structure, mode test for liquid-structure interaction system of steeliness rectangular liquid-storage structure was presented. Former four nature modes of vibration and corresponding natural frequency of liquid-structure interaction system with no liquid and liquid, with different roof thickness and the different liquid densities were obtained, and the influences of the storing liquid, the relative thickness of roof and the density of liquid on the natural frequency of liquid-structure interaction system were analyzed. The results showed that storing liquid would lower the natural frequency of liquid-storage structure, increase of roof thickness would increase the natural frequency, and increase of liquid density would have little effect on the natural frequency. The experiment provides basis for subsequent study and application of liquid-structure interaction system of rectangular liquid-storage structure.
Number of references:16
Main heading:Liquids
Controlled terms:Density of liquids - Earthquake resistance - Model structures - Natural frequencies - Roofs - Soil structure interactions - Vibration analysis
Uncontrolled terms:Desity of liquids - Liquid density - Mode test - Storage structures - Structure interactions - Study and applications - Vibration characteristics
Classification code:943.2 Mechanical Variables Measurements - 931.2 Physical Properties of Gases, Liquids and Solids - 751.2 Acoustic Properties of Materials - 751.1 Acoustic Waves - 741.1 Light/Optics - 711.1 Electromagnetic Waves in Different Media - 619.2 Tanks - 484.3 Earthquake Resistance - 483.2 Foundations - 483 Soil Mechanics and Foundations - 408 Structural Design - 405.2 Construction Methods - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2010.02.034
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 45>
Accession number:20101512841246
Title:Micro-PIV analysis of flow fields in flow channel of emitter
Authors:Jin, Wen (1); Zhang, Hongyan (1)
Author affiliation:(1) School of Environment and Municipal Engineering, Xi'an Architectural and Technological University, Xi'an 710055, China; (2) Department of Power Engineering, Xi'an Aeronautical College, Xi'an 710077, China
Corresponding author:Jin, W.
(jinwen@xihangzh.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:12-17
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 flowing rule and the clogging mechanism of the micro-irrigation emitter, Micro-PIV technology was adopted to detect and compare the inner flowing hydraulic movement of squared cross section of straight angled and round angled zigzag profile in the micro-scale channels when Re (reynolds number)was 200. Clear images of particles were obtained by combining 10x microscope, 14-digit grey scale PCO1600 camera, 3 μm fluorescence tracer particles and light filtering lens allowing 610 nm red light permeation. The flow field velocity vector patterns and streamlined diagrams of high resolution were obtained by using image processing techniques. Experiments exposed that the inner flow of tooth space in the micro-channels was proved to be cycled flow after fully development. For the more, low velocity vortex cavities existed in the vertex angle and inner side of bend angle of straight angle micro-channel, while back flow only appeared in the internal side of bend angle of round angle micro-channel. It's easy to take place deposition in the low velocity vortex cavities, which is the main cause of blocking. The low velocity vortex cavities were expanded and the back-flowing tendency appeared in the turning point of vertex angle if the section was narrowed, which had a negative impact on anti-blocking.
Number of references:15
Main heading:Velocity distribution
Controlled terms:Electroosmosis - Flow fields - Image processing - Irrigation - Reynolds number - Velocity - Velocity control - Velocity measurement
Uncontrolled terms:Back flow - Bend angle - Clogging mechanism - Cross section - Emitter - Flow channels - Fluorescence tracers - Grey scale - High resolution - Image processing technique - Inner flow - Light filtering - Low velocities - Micro PIV - Micro-scales - Microirrigation - Negative impacts - Red light - Turning points - Velocity vectors - Vertex angle
Classification code:943.3 Special Purpose Instruments - 943.2 Mechanical Variables Measurements - 931.3 Atomic and Molecular Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 922.2 Mathematical Statistics - 821.3 Agricultural Methods - 802.3 Chemical Operations - 741 Light, Optics and Optical Devices - 731.3 Specific Variables Control - 723.2 Data Processing and Image Processing - 701.1 Electricity: Basic Concepts and Phenomena - 631.1 Fluid Flow, General
DOI:10.3969/j.issn.1002-6819.2010.02.003
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 46>
Accession number:20101512841256
Title:Relation of agricultural soil fauna and soil fertility under conservation tillage systems
Authors:Zhu, Qianggen (1); Zhu, Anning (1); Zhang, Jiabao (1); Zhang, Huanchao (2); Yang, Shuli (1); Wang, Yikun (2)
Author affiliation:(1) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Acad. of Sci., Nanjing 210008, China; (2) College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; (3) College of Resources and Environment, Nanjing Agriculture University, Nanjing 210059, China
Corresponding author:Zhu, A.
(anzhu@issas.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:70-76
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:Conservation tillage improves soil conditions, increases crop yield, and is also one of the key measures in lessening biodiversity loss of agricultural soils. A Field trial with split-plot design was conducted to investigate soil fauna and soil fertility under conservation tillage systems, the relation of which was discussed in this study. The results showed that straw returning significantly increased the amounts of agricultural soil fauna, especially for collembola and acari. The interaction between tillage type and straw returning amount was significant. Application of no-tillage added straw returning significantly improved soil organic matter content, but lowered soil pH value. Straw returning increased in soil available phosphorus content and soil total nitrogen and soil urinary activity, but decreased in catalase and invertase activity when compared to the initial condition of experiment. The dominant groups (collembola and acari) of soil fauna were highly correlated with soil organic matter content, and Coleoptera, Diplura and Chilopoda might be adapted to reside in relatively high pH value soils. In conclusion, conservation tillage can improve soil organic matter content and increase soil carbon pool which is beneficial to lessen greenhouse effect, and also increase the abundance of soil fauna. The abundance of soil fauna is well correlated to soil nutrients, which shows that soil fauna plays an important role in availability of soil nutrients utilized by plants in the agro-ecosystem.
Number of references:27
Main heading:Soil conservation
Controlled terms:Agricultural machinery - Agriculture - Animals - Biodiversity - Biogeochemistry - Biological materials - Carbon dioxide - Fertilizers - Global warming - Greenhouse effect - Nutrients - Organic compounds - pH effects - Phosphorus - Soils
Uncontrolled terms:Agricultural soils - Agro ecosystems - Available phosphorus - Biodiversity loss - Coleoptera - Collembola - Conservation tillage - Conservation tillage systems - Crop yield - Field trial - High pH value - Highly-correlated - Initial conditions - Invertase activity - No tillage - Soil carbon pool - Soil conditions - Soil fauna - Soil fertility - Soil nutrients - Soil organic matter contents - Soil pH - Soil total nitrogen - Split-plot design
Classification code:801.2 Biochemistry - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 814 Leather and Tanning - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment - 821.2 Agricultural Chemicals - 821.3 Agricultural Methods - 822 Food Technology - 822.3 Food Products - 801.1 Chemistry, General - 443.1 Atmospheric Properties - 451 Air Pollution - 454 Environmental Engineering - 454.3 Ecology and Ecosystems - 461 Bioengineering and Biology - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 471 Marine Science and Oceanography - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 644.2 Refrigerants
DOI:10.3969/j.issn.1002-6819.2010.02.013
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 47>
Accession number:20101512841308
Title:Fuzzy optimization of enzyme assistant aqueous for extracting oil and protein from extruded soybean
Authors:Li, Yang (1); Jiang, Lianzhou (1); Zhang, Zhaoguo (3); Wu, Haibo (1); Sun, Peiling (3); Xu, Jing (1); Wu, Xia (1)
Author affiliation:(1) College of Food Science, Northeast Agricultural University, Harbin 150030, China; (2) National Research Center of Soybean Engineering and Technology, Harbin 150030, China; (3) College of Agricultural Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Jiang, L.
(jlzname@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:375-380
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 differences among parameters for soybean oil and soy protein extraction using enzyme assistant techniques. The object of this research was to optimize enzyme assistant technique using fuzzy evaluation method based on soybean oil and protein, and extraction parameters of high soybean oil and protein was obtained. The parameters were following, enzyme dosage 1.85%, temperature of enzyme hydrolysis 50°C, time period 3.6 h, ratio of material to liquid 1:6, pH value 9. Relatively bigger recoveries of soybean oil and protein were 92.76% and 93.81% respectively. The results of Scanning Electron Microscope, energy disperse spectroscopy and optical microscope showed that soybean oil releasing depended on situation of protein hydrolysis for soybean after being extruded and expanded. Structure of soybean cells was completed destroyed after extrusion and expansion, while lipoprotein was not destroyed, so the soybean protein needed to be hydrolyzed completely to release soy oil. The result shows that it is a feasible way to prove soy oil and protein yield using enzyme assistant method after extrusion and expansion.
Number of references:18
Main heading:Oils and fats
Controlled terms:Agricultural products - Drying oils - Enzymes - Extrusion - Hydrolysis - Leakage (fluid) - Microscopes - Scanning electron microscopy
Uncontrolled terms:Enzyme dosage - Enzyme hydrolysis - Fuzzy evaluation method - Fuzzy optimization - Optical microscopes - pH value - Protein hydrolysis - Protein yield - Scanning Electron Microscope - Soy oil - Soy protein - Soybean oil - Soybean proteins - Time periods
Classification code:801.2 Biochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids - 813.2 Coating Materials - 821.4 Agricultural Products - 822.3 Food Products - 816.1 Processing of Plastics and Other Polymers - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 452.1 Sewage - 452.3 Industrial Wastes - 461.2 Biological Materials and Tissue Engineering - 483.1 Soils and Soil Mechanics - 535.2.2 Metal Forming Practice - 619.1 Pipe, Piping and Pipelines
DOI:10.3969/j.issn.1002-6819.2010.02.066
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 48>
Accession number:20101512841260
Title:Effects of different alfalfa-crop rotation patterns on water recovery of degradation alfalfa grassland
Authors:Liu, Peisong (1); Jia, Zhikuan (1); Li, Jun (1); Wang, Junpeng (1); Han, Qingfang (1)
Author affiliation:(1) College of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Key Laboratory of Ecological Restoration in Low Mountain and Hilly Areas, Pingdingshan University, Pingdingshan 467000, China
Corresponding author:Jia, Z.
(zhikuan@tom.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:95-102
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Experiments were carried out in the drought areas of southern Ningxia Hui Autonomous Region on the loess plateau during from 2003 to 2005, in which three kinds of crops including spring wheat, potato and millet were rotated in the form of combination on the 10-year-old degraded alfalfa grassland. The purposes are to study and compare the soil moisture restoration conditions and crop production effectiveness between different rotations, thus approach more reasonable alfalfa rotation patterns. The results showed that, rotation in 0-60 cm soil layer was vulnerable to the impact of precipitation and surface evaporation, moisture in 60-120 cm soil was mainly consumed by rotation crops, while moisture in 120-200 cm was stable relatively and rarely influenced by precipitation and surface evaporation, and there was a trend of continuous restoration in it with the increasing of rotation year. The moisture in 120-200 cm soil could be improved by alfalfa-crop rotation. And it was significantly higher than that of abandoned land and grassland (CK), and could obtain certain crop yields meanwhile. Compared with other alfalfa-crop rotation patterns, potato- potato- wheat rotation pattern (PPW) has better restoration role on grassland moisture and ability to make use of limited precipitation. Total yields and water use efficiency (WUE) of rotation crops with PPW pattern were both relatively higher than others, i.e., 5214.5 kg/hm<sup>2</sup> and 9.38 kg/(hm<sup>2</sup>·mm), respectively. Compared with alfalfa farmland before crop rotation, the net moisture recovery amount of PPW rotation pattern was 24.73 mm in 120-200 cm soil layer.
Number of references:34
Main heading:Rotation
Controlled terms:Arid regions - Biochemical oxygen demand - Crops - Cultivation - Evaporation - Moisture determination - Restoration - Soil moisture - Water supply
Uncontrolled terms:Abandoned land - Crop production - Crop rotation - Crop yield - Loess Plateau - Rotation crops - Rotation pattern - Soil layer - Spring wheat - Surface evaporation - Total yield - Water recovery - Water use efficiency
Classification code:802.3 Chemical Operations - 821.3 Agricultural Methods - 821.4 Agricultural Products - 601.1 Mechanical Devices - 901.4 Impact of Technology on Society - 931.1 Mechanics - 944.2 Moisture Measurements - 913.5 Maintenance - 483.1 Soils and Soil Mechanics - 409 Civil Engineering, General - 443 Meteorology - 444 Water Resources - 402 Buildings and Towers - 446.1 Water Supply Systems - 452.4 Industrial Wastes Treatment and Disposal - 453 Water Pollution - 452.2 Sewage Treatment
DOI:10.3969/j.issn.1002-6819.2010.02.017
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 49>
Accession number:20101512841258
Title:Effect of soil texture on soil water availability for different maize physiological indices
Authors:Wu, Yuanzhi (1); Huang, Mingbin (1)
Author affiliation:(1) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Acad. of Sci., Yangling 712100, China; (2) Institute of Soil and Water Conservation, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) Graduate University of Chinese Acad. of Sci., Beijing 100049, China
Corresponding author:Wu, Y.
(wuyuanzhi05@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:82-88
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 estimating the influence of soil texture on soil water availability for different maize (Zea mays L.) physiological indices, maize plants were grown in pot experiments using three soil textural types (heavy loam, medium loam and sandy loam) and a plot experiment using one soil (heavy loam) under different water regimes. The changes of different maize physiological indices in response to the changes in relative soil water content (soil water content dividing by the field capacity) was studied. Results showed that the soil water availability on various physiological indices in the three textural types of soil remained constant until soil water content decreased below the threshold value and then declined linearly with further soil water depletion. A linear-plateau model well represented the relationships between each relative plant physiological index and the relative soil water content with an R<sup>2</sup> value in the range of 0.824-0.999. Soil water availability declined with soil texture in the order: sandy loam > loam > heavy loam. The threshold values for physiological indices at the transient scale were lower than those for the indices at the daily and seasonal scales. Therefore, the responses to soil water availability of different maize physiological indices were found to be affected by soil texture and by the time scale over which the various indicators were determined.
Number of references:18
Main heading:Geologic models
Controlled terms:Crops - Heavy water - Moisture determination - Physiological models - Soil conditioners - Soil moisture - Textures - Underwater soils - Water content
Uncontrolled terms:Field capacity - Gas exchange - Gas exchange indices - Growth indices - Linear plateaux - Maize (Zea mays L.) - Maize plants - Physiological indices - Pot experiment - Sandy loams - Seasonal scale - Soil textures - Soil water - Soil water availability - Soil water content - Time-scales - Water regime
Classification code:944.2 Moisture Measurements - 933 Solid State Physics - 821.4 Agricultural Products - 804 Chemical Products Generally - 483.1 Soils and Soil Mechanics - 481.1 Geology - 471.1 Oceanography, General - 461.1 Biomedical Engineering - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.02.015
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 50>
Accession number:20101512841247
Title:Effect of chlorination on yield and nitrogen uptake of tomato and emitter clogging in a drip irrigation system with sewage effluent
Authors:Li, Yanfeng (1); Li, Jiusheng (1)
Author affiliation:(1) Department of Irrigation and Drainage, China Institute of Water Resources and Hydropower Research, Beijing 100048, China
Corresponding author:Li, J.
(lijs@iwhr.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:18-24
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:Chlorination is a common practice used in prevention and treatment of emitter clogging caused by algae and bacteria, but the effect of chlorination on crop growth has not been adequately addressed. Field experiments were conducted in a solar-heated greenhouse to investigate the effects of chlorine concentration and injection frequency on emitter clogging of drip system with sewage effluent and tomato yield, quality and nitrogen uptake. A multiple regression equation to predict nitrate content in soil from the measured soil bulk electrical conductivity, water content and temperature was derived. Then the equation was used to investigate the effects of chlorination on nitrate dynamics and nitrogen uptake. The results demonstrated that chlorination is an effective method for preventing the reduction of emitter discharge in drip systems applying sewage effluent. Drip irrigation with sewage effluent increased nitrate content in upper 15 cm layer of soil and nitrogen content of plant stem and produced a greater nitrogen uptake than irrigation with groundwater. Chlorination decreased the total nitrogen content of plant stem and nitrogen uptake, and increased the accumulation of nitrate in upper layer of soil. The increase of chlorine concentration and injection frequency led to a significant increase of nitrate accumulation. A slightly greater yield of tomato was observed for drip irrigation with sewage effluent than irrigation with groundwater, while chlorination resulted in a decreased yield. Irrigation with sewage effluent increased soluble sugar and water-soluble acid of tomato fruits, but decreased ascorbic acid and soluble solids. Chlorination might alleviate the decreasing trends of ascorbic acid and soluble solids resulted from sewage application. The results obtained from this study suggested that injection of chlorine with an input concentration of less than 50 mg/L and an interval of larger than two weeks do not impose a negative influence on tomato growth, although the injection of chlorine may restrain the nitrogen uptake of plant.
Number of references:14
Main heading:Irrigation
Controlled terms:Chlorination - Chlorine - Effluents - Electric conductivity - Fruits - Groundwater - Ketones - Nitrates - Nitrogen - Organic acids - Sewage - Soils - Sugar (sucrose) - Water content
Uncontrolled terms:Ascorbic acids - Chlorine concentration - Clogging - Concentration of - Crop growth - Drip irrigation - Drip irrigation systems - Drip system - Electrical conductivity - Emitter clogging - Field experiment - Injection frequencies - Multiple regression equations - Negative influence - Nitrate accumulation - Nitrate dynamics - Nitrogen content - Nitrogen uptake - Plant stems - Sewage application - Sewage effluents - Solar-heated greenhouse - Soluble solids - Soluble sugars - Tomato fruits - Tomato yield - Total nitrogen content - Upper layer
Classification code:822.3 Food Products - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821.3 Agricultural Methods - 821.4 Agricultural Products - 701.1 Electricity: Basic Concepts and Phenomena - 453.1 Water Pollution Sources - 452.3 Industrial Wastes - 452.1 Sewage - 444.2 Groundwater - 444 Water Resources - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2010.02.004
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 51>
Accession number:20101512841267
Title:Optimization experiment on test-bed of horizontal disk weeding unit between seedlings
Authors:Han, Bao (1); Wu, Wenfu (2); Shen, Jianying (1)
Author affiliation:(1) Engineering College, Northeast Agricultural University, Harbin 150030, China; (2) Bio-Agriculture Engineering College, Jilin University, Changchun 130025, China
Corresponding author:Han, B.
(hanbao2004@126.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:142-146
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To optimize the design and confirm the optimal combination of the key parameters of weeding unit which is part of weeding machine, the structure and working principles of the weeding unit were analyzed. A multi-index orthogonal experiment of four factors (the working speed, the rotation speed of weeding unit as well as the number and installation radius of weeding tines) were carried out, and each factor had four levels. For optimizing the best operational parameters combination, the effects of the parameters of the weeding unit on its weeding performances were analyzed. The experiment result indicated that the number of weeding tines had significantly effect on the performances of the weeding unit. According to the analysis, the best scheme was: the number of weeding tines 12, and rotation speed 190 r/min, installation radius 170 mm, working speed 2.1 m/s. Under such working conditions, the wounded seedling rate, weeding rate, and seedling buried percentage were 4.41%, 73.1%, less than 3%, respectively. The results can satisfied with the agronomic requirements of weeding between seedlings in dry farmland.
Number of references:15
Main heading:Experiments
Controlled terms:Agricultural machinery - Machine design - Optimization - Rotation - Seed - Speed - Weed control
Uncontrolled terms:Dry farmlands - Key parameters - Multi-index - Operational parameters - Optimal combination - Orthogonal experiment - Rotation speed - Weeding machines - Working conditions - Working principles - Working speed
Classification code:921.5 Optimization Techniques - 901.3 Engineering Research - 821.4 Agricultural Products - 821.2 Agricultural Chemicals - 821.1 Agricultural Machinery and Equipment - 931.1 Mechanics - 803 Chemical Agents and Basic Industrial Chemicals - 601.1 Mechanical Devices - 601 Mechanical Design - 407.2 Waterways - 406.2 Roads and Streets - 681.1 Railway Plant and Structures, General
DOI:10.3969/j.issn.1002-6819.2010.02.024
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 52>
Accession number:20101512841290
Title:Comprehensive evaluation of biogas ecosystem modes
Authors:Chen, Yu (1); Yang, Gaihe (2); Feng, Yongzhong (2); Ren, Guangxin (2); Li, Yibing (2)
Author affiliation:(1) Forestry College, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) College of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) Research Center for Recycling Agricultural Engineering Technology of Shanxi Province, Yangling 712100, China
Corresponding author:Yang, G.
(ygh@nwsuaf.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:274-279
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 quantitatively assess the structure, function and benefit of biogas eco-agricultural models, based on the studies of eco-agricultural model evaluation index system, 17 indicators were selected to construct a comprehensive evaluation index system of biogas eco-agricultural model, multilevel averaging weight method was used to confirm the weights of indices, the assessment model was constructed by comprehensive evaluation method. We also verified the model with the data of two typical biogas eco-agricultural models (Longxian "biogas digester-toilet-stable-vegetables, fruits, food)" courtyard ecological agriculture model and Qianyang County "mulberry tree-silkworm-agaricus bisporus-stable-biogas digester" eco-agricultural model) in Baoji City, Shanxi Province, and the assessment results were consistent with the actual situation.It is showed that the evaluation index system and the model have adaptability.
Number of references:20
Main heading:Biogas
Controlled terms:Ecosystems - Structural design - Structural frames - Trees (mathematics)
Uncontrolled terms:Agaricus bisporus - Assessment models - Biogas digesters - Comprehensive evaluation - Comprehensive evaluation index system - Efficiency evaluation - Evaluation - Evaluation index system - Model evaluation - Multilevel averaging weight methods
Classification code:408.1 Structural Design, General - 408.2 Structural Members and Shapes - 454.3 Ecology and Ecosystems - 522 Gas Fuels - 821.5 Agricultural Wastes - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
DOI:10.3969/j.issn.1002-6819.2010.02.047
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 53>
Accession number:20101512841309
Title:Performances of polypropylene composite material filled with four kinds of plant fiber powders
Authors:He, Chunxia (1); Gu, Hongyan (1); Xue, Panfang (1)
Author affiliation:(1) College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:He, C.
(chunxiahe@tom.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:381-384
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 plant fibers of crops and agricultural wastes, and to research on environmental friendly material, four kinds of plant fiber powder/polypropylene composites were prepared. The tensile strength, blexural strength and blexural modulus of the composites were evaluated, and the water absorption and pyrocondensation of the materials were investigated. The results showed that the polypropylene composite filled with straw and rice husk hybrid powder had good mechanical properties, tensile strength and flexural strength of the composites filled with rice husk powder or wood powder or straw and rice husk hybrid powder had little difference. Bamboo powder/polypropylene composites had poor performance, low mechanical properties, and large water absorption and heating rate of change. Rice husk powder and polypropylene composites had better consistency, and bamboo or wood powder was compatible poorly with the polypropylene. The properties of composites decreased, and the composites had brittle destruction. Rice husk powder, mixed powder of rice husk and straw, and polypropylene can be made for the wood-plastic composite material with better properties.
Number of references:11
Main heading:Water absorption
Controlled terms:Agricultural wastes - Bamboo - Composite micromechanics - Filled polymers - Mechanical properties - Plastic products - Tensile strength - Textile fibers - Thermoplastics
Uncontrolled terms:Application performance - Plant fiber powder - Plant fibers - Polypropylene composite
Classification code:951 Materials Science - 931.1 Mechanics - 821.5 Agricultural Wastes - 821.4 Agricultural Products - 819.2 Synthetic Fibers - 819.1 Natural Fibers - 817.1 Polymer Products - 816.1 Processing of Plastics and Other Polymers - 815.1.1 Organic Polymers - 811.1 Pulp and Paper - 802.3 Chemical Operations - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2010.02.067
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 54>
Accession number:20101512841265
Title:Effect of irrigation amount on physiology, biochemistry and fruit quality of greenhouse tomato under sub-low temperatures
Authors:Li, Jianming (1); Wang, Ping (1); Li, Jiang (1)
Author affiliation:(1) College of Horticulture, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Li, J.
(lijianming66@163.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:129-134
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With potted tomato plants in greenhouse as the experiment material, and with the plant under normal temperature as control treatment, we investigated the influence of 80%, 100% and 120% of ET of irrigation amount on the cold resistance and fruit quality of tomato under sub-low temperatures in greenhouse. The results showed that sub-low temperatures reduced the activities of catalase and peroxidase, chlorophyll content, relative content and soluble protein content in tomato leaves, as well as fruit quality significantly; but they increased the relative permeability of cell membrane and superoxide dismutase; under both sub-low and normal temperatures, Vc and sugar content, soluble solids were reduced while the total acidity was increased under the condition of 80% or 120% of ET of irrigation amount. It is proved that 100% of ET of irrigation amount under sub-low temperatures was favorable to plant growth and fruit quality during flowering and fruit-setting periods.
Number of references:24
Main heading:Fruits
Controlled terms:Biochemistry - Cell membranes - Chlorophyll - Cytology - Greenhouse effect - Greenhouses - Irrigation - Oxygen - Plant life extension - Porphyrins - Sugar (sucrose)
Uncontrolled terms:Chlorophyll contents - Cold resistance - Fruit quality - Greenhouse tomatoes - Index - Low temperatures - Plant growth - Relative permeability - Soluble proteins - Soluble solids - Sugar content - Super oxide dismutase - Tomato leaves - Tomato plants
Classification code:912.1 Industrial Engineering - 822.3 Food Products - 821.6 Farm Buildings and Other Structures - 821.4 Agricultural Products - 821.3 Agricultural Methods - 804.1 Organic Compounds - 804 Chemical Products Generally - 801.2 Biochemistry - 461.9 Biology - 461.2 Biological Materials and Tissue Engineering - 451 Air Pollution - 443.1 Atmospheric Properties - 402.1 Industrial and Agricultural Buildings
DOI:10.3969/j.issn.1002-6819.2010.02.022
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 55>
Accession number:20101512841302
Title:Potato shape detection based on Zernike moments
Authors:Hao, Min (1); Ma, Shuoshi (1); Hao, Xiaodong (2)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Inner Mongolia Agriculture University, Hohhot 010018, China; (2) Xuejiawan Power Supply Bureau, Hohhot 010300, China
Corresponding author:Ma, S.
(mashuoshi@imau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:347-350
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:Up to now, the shape feature of potato shape detection based on machine vision is single with little relative investigation. Taking Zernike moments and support vector machine as shape detecting feature and classifier respectively, an approach to potato shape detection and classification, which yielded a relatively higher accuracy, was proposed in this paper. The image was first normalized by using best image segmentation method to obtain scale and translation invariance. The rotation invariant Zernike features were then extracted from the normalized images, among which 19 features were selected. At last, shape classification was accomplished by inputting the selected features into support vector machine classifier. A new mixed kernel function of RBF and Sigmoid kernel function was proposed, resulting in 93% and 100% detection accuracy for the perfect and malformation potatoes, respectively.
Number of references:13
Main heading:Agricultural products
Controlled terms:Agricultural machinery - Automatic testing - Classifiers - Computer vision - Image recognition - Image segmentation - Support vector machines
Uncontrolled terms:Classification , - Detection accuracy - Machine vision - Mixed kernel function - Normalized image - On-machines - Rotation invariant - Shape classification - Shape detection - Shape features - Sigmoid kernels - Translation invariance - Zernike - Zernike moments
Classification code:821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 802.1 Chemical Plants and Equipment - 751.1 Acoustic Waves - 741.2 Vision - 741.1 Light/Optics - 731.6 Robot Applications - 723.5 Computer Applications - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television - 423 Non Mechanical Properties and Tests of Building Materials - 422 Strength of Building Materials; Test Equipment and Methods
DOI:10.3969/j.issn.1002-6819.2010.02.060
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 56>
Accession number:20101512841272
Title:Localization system of agricultural machinery based on omni-directional vision sensor
Authors:Li, Ming (1); Li, Xu (1); Sun, Songlin (1); Xie, Fangping (1); Wu, Mingliang (1); Li, Junzheng (1)
Author affiliation:(1) College of Engineering, Hunan Agricultural University, Changsha 410128, China
Corresponding author:Li, M.
(liminghnau@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:170-174
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:The omni-directional vision sensor can provide an image of 360 degree around the sensor and the directional angles of objects obtained from the image are relatively accurate. This study proposed a localization system for agricultural machinery navigation utilizing characters of omni-directional vision sensor. The system consisted of four artificial landmarks, an omni-directional vision sensor, PC, PC software and operating vehicle. The algorithm mainly included that the principal point of camera was obtained via calibration; the landmark positions were extracted by image processing to get the direction angles between landmarks from the image. Camera position was estimated according with circumferential theorem and geometric transformation based on the direction angles. Experiments were conducted on the level cement ground under daylight lamps in a 5 m×3 m rectangular area in the laboratory. Ten test positions were chosen equably. Results showed that the distance mean absolute error between estimated position and test position was less than 3 cm. In conclusion, the system is feasible.
Number of references:19
Main heading:Image processing
Controlled terms:Agricultural machinery - Cameras - Imaging systems - Lighting - Sensors - Statistical tests
Uncontrolled terms:Artificial landmark - Automatic guidance - Camera positions - Direction angle - Distance mean - Geometric transformations - Localization - Localization system - Omni-directional vision - Rectangular area
Classification code:922.2 Mathematical Statistics - 821.1 Agricultural Machinery and Equipment - 801 Chemistry - 746 Imaging Techniques - 742.2 Photographic Equipment - 741 Light, Optics and Optical Devices - 732.2 Control Instrumentation - 723.2 Data Processing and Image Processing - 707 Illuminating Engineering
DOI:10.3969/j.issn.1002-6819.2010.02.028
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 57>
Accession number:20101512841245
Title:Numerical simulation of particle separation in hydrocyclone for drip irrigation system
Authors:Liu, Xinyang (1); Luo, Jinyao (1); Gao, Chuanchang (2)
Author affiliation:(1) School of Water Resources and Hydropower, Wuhan University, Wuhan 430072, China; (2) Institute of Electric Power, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450008, China
Corresponding author:Luo, J.
(luojy@whu.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:7-11
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 mixture multiphase model combined with the RSM(reynolds stress model) and kinetic theory of granular flow for high concentration multiphase flow was used to simulate the particle volumetric concentration distribution and separative efficiency in a hydrocyclone for drip irrigation system. The distribution situation and separating effecting of different diameter particles concentrating the hydrocyclone was obtained. The small diameter particles were mainly distributed in the region of inner vertex and had higher separation efficiency. While the big diameter particles were mainly distributed in the region of outer vortex and had poor separation efficiency. The separative efficiency computed by the mixture multiphase model was in accordance with the Eula multiphase model. Then, the influence of the entrance velocity and concentration on the separative efficiency was analyzed. The simulation results showed that the mixture multiphase model was available for the numerical simulation of multi-phase flow in the hydrocyclone. The results have great importance to the choice and optimal structure designing of hydrocyclone for the drip irrigation system.
Number of references:18
Main heading:Computer simulation
Controlled terms:Computational fluid dynamics - Computational methods - Cyclone separators - Irrigation - Machinery - Mixtures - Multiphase flow - Particles (particulate matter) - Reynolds number
Uncontrolled terms:Drip irrigation systems - Entrance velocity - Hdraulic machinery - High concentration - Hydro-cyclone - Kinetic theory of granular flow - Multiphase model - Numerical simulation - Optimal structures - Particle - Particle separation - Reynolds stress models - Separation efficiency - Simulation result - Small-diameter - Volumetric concentrations
Classification code:802.3 Chemical Operations - 804 Chemical Products Generally - 821.3 Agricultural Methods - 951 Materials Science - 921 Mathematics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 921.6 Numerical Methods - 802.1 Chemical Plants and Equipment - 723.5 Computer Applications - 451.1 Air Pollution Sources - 601 Mechanical Design - 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 631.1.2 Gas Dynamics - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
DOI:10.3969/j.issn.1002-6819.2010.02.002
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 58>
Accession number:20101512841283
Title:Non-destructive detection of cocoon shell weight based on variable selection by visible and near infrared spectroscopy
Authors:Huang, Lingxia (1); Wu, Di (2); Jin, Hangfeng (1); Zhao, Lihua (3); He, Yong (2); Jin, Peihua (1); Lou, Chengfu (1)
Author affiliation:(1) College of Animal Sciences, Zhejiang University, Hangzhou 310029, China; (2) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China; (3) Huzhou Agricuhural Academy of Zhejiang Province, Huzhou 313000, 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:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:231-236
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Visible and near-infrared reflectance spectroscopy (Vis-NIRS) was applied to measure cocoon shell weight. Least square-support vector machine (LS-SVM) was used to establish the Vis-NIR model. Uninformative variable elimination and successive projections algorithm were combined to select wavelength from Vis-NIR spectroscopy. Eight wavelength variables, namely 673, 937, 963, 982, 989, 992, 995 and 1008 nm, were selected. The UVE-SPA-LS-SVM model was established based on these eight wavelength variables. The results showed that the determination coefficient for prediction set (R<inf>p</inf><sup>2</sup>) was 0.5354, and the root mean square error for prediction (RMSEP) was 0.0373. It is concluded that Vis-NIRS can be used in the cocoon shell weight measurement, and UVE-SPA is a feasible and efficient algorithm for the spectral variable selection.
Number of references:18
Main heading:Infrared spectroscopy
Controlled terms:Algorithms - Infrared devices - Infrared transmission - Near infrared spectroscopy - Nondestructive examination - Shells (structures) - Spectrum analysis - Support vector machines - Weighing
Uncontrolled terms:Cocoon - Determination coefficients - Efficient algorithm - Least square support vector machines - Model analysis - Nondestructive detection - Root mean square errors - Spectral variables - Successive projections algorithm - SVM model - Uninformative variable eliminations - Variable selection - Vis-NIR spectroscopy - Visible and near infrared reflectance spectroscopy - Visible and near-infrared spectroscopy - Weight measurement
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 941 Acoustical and Optical Measuring Instruments - 941.4 Optical Variables Measurements - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 943.3 Special Purpose Instruments - 921 Mathematics - 408.2 Structural Members and Shapes - 421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 801 Chemistry - 423.2 Test Methods - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2010.02.040
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 59>
Accession number:20101512841264
Title:Development and application of a simple rainfall runoff model for surface process analysis
Authors:Li, Hui (1); Chen, Xiaoling (2); Ma, Wenjie (4); Liu, Hai (3)
Author affiliation:(1) Geography Department, China University of Geoscience, Wuhan 430074, China; (2) Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330027, China; (3) State Key Lab. of Information Engineering in Surveying Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China; (4) School of Communication, Qingdao Agriculture University, Qingdao 266106, China
Corresponding author:Li, H.
(giantlee_fly@yahoo.com.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:122-128
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 physically based distributed rainfall-runoff model was developed to simulate the hydrological processes and thus to lay foundation for soil erosion and non-point pollution study of watershed. This model discretizes watershed into a number of square elements and classifies them into hil1slope and channel ones based on the water flow properties. The runoff generation processes of precipitation, interception by vegetation and infiltration were built into the model. The generated runoff was routed using dynamic waves. The model was used to simulate the hydrological process and to model the spatial distribution of runoff depth and carrying capacity of one rainfall event after being properly calibrated and validated in Zaokou Watershed. The results showed that the runoff process could be accurately simulated and the modeled runoff depth and carrying capacity agree well with that of hydrological theory. The model provide framework for soil erosion and no-point pollution study.
Number of references:25
Main heading:Geologic models
Controlled terms:Landforms - Pollution - Runoff - Size distribution - Soil mechanics - Soils - Watersheds
Uncontrolled terms:Carrying capacity - Distributed model - Distributed models - Hydrological process - Nonpoint pollutions - Physically based - Point pollution - Rainfall event - Rainfall runoff - Rainfall-runoff models - Runoff depth - Runoff generation - Soil erosion - Spatial distribution - Surface process - Water flows
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 531.2 Metallography - 483.1 Soils and Soil Mechanics - 933.1 Crystalline Solids - 481.1 Geology - 444.1 Surface Water - 442.1 Flood Control - 423 Non Mechanical Properties and Tests of Building Materials - 454.2 Environmental Impact and Protection
DOI:10.3969/j.issn.1002-6819.2010.02.021
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 60>
Accession number:20101512841300
Title:Determination of moisture in chestnuts using near infrared spectroscopy
Authors:Liu, Jie (1); Li, Xiaoyu (1); Li, Peiwu (2); Wang, Wei (1); Zhou, Wei (1); Zhang, Jun (1); Zhang, Rongrong (1); Xiao, Wu (1)
Author affiliation:(1) College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070, China; (2) Oil Crops Research Institute, Chinese Academy of Agricultural Science, Wuhan 430062, China
Corresponding author:Li, X.
(lixiaoyu@mail.hzau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:338-341
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:Moisture of chestnuts is one of the key indicators affecting their storage and processing. The aim of this study was to evaluate the feasibility of near infrared reflectance (NIR) spectroscopy to determine the moisture of chestnuts with rapid non-destructive testing. The Sample Set Partitioning based on joint X-Y distances, as a method to improve the model performance, was explored when the calibration and validation subset were partitioned. Partial least squares regression models based on a population of 240 samples were established for chestnuts with and without peel respectively and the effect of different preprocessing, namely First Derivative, Second Derivative, Standard Normal Variety Multiplicative Scatter Correction and Non-preprocessing to the performance of models were compared. The results showed that for both peeled and intact chestnuts, the models developed from spectra after First Derivative preprocessing achieved the optimal performance. The model for peeled chestnuts gave more accurate prediction with 1.58% as the root mean square error of calibration (RMSEC), 1.48% as that of prediction (RMSEP), and 0.92 and 0.90 as the correlation coefficient (R) of calibration and validation subset, respectively. These parameters of the model for intact chestnuts were 2.35%, 2.29%, 0.82 and 0.79, respectively. The overall results indicated that NIR spectroscopy could be applied as a nondestructive and accurate alternative method for the determination of chestnuts moisture during orchards and post-harvest process rapidly.
Number of references:14
Main heading:Infrared spectroscopy
Controlled terms:Calibration - Fruits - Infrared devices - Moisture - Moisture determination - Near infrared spectroscopy - Nondestructive examination - Regression analysis
Uncontrolled terms:Accurate prediction - Alternative methods - Chestnuts - Correlation coefficient - First derivative - Key indicator - Model performance - Multiplicative scatter correction - Near infrared reflectance spectroscopy - NIR spectroscopy - Non destructive - Non destructive testing - Non-destructive measurement - Optimal performance - Partial least squares regression - Postharvest - Root mean square error of calibrations - Sample sets - Second derivatives
Classification code:922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 941 Acoustical and Optical Measuring Instruments - 941.4 Optical Variables Measurements - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 944.2 Moisture Measurements - 902.2 Codes and Standards - 421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 423.2 Test Methods - 443.1 Atmospheric Properties - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry - 801.4 Physical Chemistry - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.02.058
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 61>
Accession number:20101512841278
Title:Design of automobile clutch comprehensive performance detection platform based on Kalman filter
Authors:Zhang, Bangcheng (1); Wang, Zhanli (1); Gao, Zhi (1); Shao, Chunping (2); Wu, Yajun (3); Wang, Chongbo (2)
Author affiliation:(1) School of Mechatronical Engineering, Changchun University of Technology, Changchun 130012, China; (2) Changchun Zhonglian Test Instrument Company Limited, Changchun 130023, China; (3) Research and Development Center, China First Auto Work Group Corporation, Changchun 130022, China
Corresponding author:Zhang, B.
(zhangbangcheng06@tsinghua.org.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:202-206
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 obtaining the clutch's operating performance and related characteristics accurately and completely, a platform for testing the automobile clutch comprehensive performance was designed. By adjusting the size of the motor speed, torque and inertia torque plate and the road resistance, the working condition of different models of clutch could be simulated. Thus, a variety of clutch could be tested by using the single device. Due to the big disturbance torque and high requirement of control accuracy, a fuzzy-PID control algorithm was proposed for the rotational speed control. Moreover, Kalman filter was designed to eliminate the random noise and industrial frequency disturbance. Using the industrial computer and PLC as host computer and slave computer, respectively, the interface and data acquisition programs were developed based on the Visual VC++. The experimental results demonstrated that the testing accuracy and efficiency were improved. Moreover, the testing platform worked stably and reliably.
Number of references:16
Main heading:Clutches
Controlled terms:Algorithms - Automobile testing - Computer control systems - Controllers - Interfaces (computer) - Kalman filters - Personal computers - Predictive control systems - Programmable logic controllers - Programmed control systems - Proportional control systems - Three term control systems
Uncontrolled terms:Comprehensive performance - Control accuracy - Disturbance torque - Fuzzy-PID control - Host computers - Industrial computers - Industrial frequency - Industrial personal computer - Industrial personal computers - Motor speed - Operating performance - Random noise - Rotational speed control - Testing accuracy - Testing platforms - Working conditions
Classification code:921 Mathematics - 732.1 Control Equipment - 731.1 Control Systems - 723.5 Computer Applications - 723.1 Computer Programming - 723 Computer Software, Data Handling and Applications - 722.4 Digital Computers and Systems - 722.2 Computer Peripheral Equipment - 716.1 Information Theory and Signal Processing - 703.2 Electric Filters - 663 Buses, Tractors and Trucks - 662 Automobiles and Smaller Vehicles - 602.2 Mechanical Transmissions
DOI:10.3969/j.issn.1002-6819.2010.02.035
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 62>
Accession number:20101512841288
Title:Preparation of the small concrete hollow block with PCM and its efficacy in greenhouses
Authors:Zhang, Yong (1); Zou, Zhirong (1); Li, Jianming (1); Hu, Xiaohui (1)
Author affiliation:(1) College of Horticulture, Northwest Agricultural and Forestry University, Yangling 712100, China
Corresponding author:Zou, Z.
(zjzp@public.xa.sn.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:263-267
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:Phase-change heat storage is a hot area in building and energy researches, and it is very important to apply this technique to greenhouses. This paper analyzes the characteristics of phase-change materials for greenhouses and the preparation of the small concrete hollow block with PCM and its efficacy in greenhouses, and points out the way to use phase-change heat storage techniques in greenhouses. By researching their thermal properties by Differential Scanning Celemeter (DSC), for the new compound PCM composed of Na<inf>2</inf>SO<inf>4</inf>·10H<inf>2</inf>O and Na<inf>2</inf> CO<inf>3</inf>·10H<inf>2</inf>O, the sample in t he mass proportion of 4:6 is suitable for greenhouse. The phase transformation temperature which divided into two stages meets the need of plant growth. During the application process, the phenomena of super cooling and phase segregation can't be eliminated completely. For the new compound PCM composed of Na<inf>2</inf>SO<inf>4</inf>·10H<inf>2</inf>O and Na<inf>2</inf>HPO<inf>4</inf>·12H<inf>2</inf>O, the sample in the mass proportion of 1.9:7 is suitable for greenhouse. The phase transformation temperature remain stable, the phenomena of super cooling and phase segregation meet the requirements. This paper serves as a valuable reference for researchers with regard to developing new ideas and methods in applying phase-change material in greenhouses.
Number of references:15
Main heading:Phase change materials
Controlled terms:Buoyancy - Greenhouses - Heat storage - Phase separation - Plant life extension - Pulse code modulation - Research - Segregation (metallography) - Sodium - Solar energy - Solar radiation - Thermodynamic properties
Uncontrolled terms:Application process - Energy research - In-buildings - Mass proportion - Phase changes - Phase segregations - Phase transformation temperature - Plant growth - The small concrete hollow block with PCM - Thermal properties - Two stage - Use Phase
Classification code:657.1 Solar Energy and Phenomena - 716 Telecommunication; Radar, Radio and Television - 801.4 Physical Chemistry - 802.3 Chemical Operations - 821.6 Farm Buildings and Other Structures - 901.3 Engineering Research - 912.1 Industrial Engineering - 931.2 Physical Properties of Gases, Liquids and Solids - 933 Solid State Physics - 641.2 Heat Transfer - 402.1 Industrial and Agricultural Buildings - 525.7 Energy Storage - 531.2 Metallography - 549.1 Alkali Metals - 615 Thermoelectric, Magnetohydrodynamic and Other Power Generators - 615.2 Solar Power - 616 Heat Exchangers - 631 Fluid Flow - 641.1 Thermodynamics
DOI:10.3969/j.issn.1002-6819.2010.02.045
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 63>
Accession number:20101512841292
Title:Biodiesel preparation using Jatropha oil by ultrasonic and nanometer catalysts
Authors:Deng, Xin (1); Fang, Zhen (1); Zhang, Fan (1); Long, Yunduo (1); Yu, Changliu (3)
Author affiliation:(1) BiomassGroup, Xishuangbanna Tropical Botanical Garden, Chinese Acad. of Sci., Kunming 650223, China; (2) School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China; (3) Petrochemical Company, Dagang Petrochemical, Dagang Oilfield, Tianjin 300280, China
Corresponding author:Fang, Z.
(zhenfang@xtbg.ac.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:285-289
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:Biodiesel was prepared continuously in an ultrasonic tubular reactor with calcined Zn-Mg-Al hydrotalcite as catalyst and Jatropha oil as raw material with high acid value. Assisted with ultrasonic radialization, the optimized conditions for biodiesel production catalyzed by calcined Zn-Mg-Al hydrotalcite were obtained. Experimental results showed that at the optimized conditions, i.e., ultrasonic power 210 W, methanol to Jatropha oil molar ratio 4:1, catalyst concentration 1.2% and reaction temperature 60°C, the yield of biodiesel was 94.3%. On the optimized conditions, biodiesel could be continuously produced with Jatropha oil as raw material, the specification of biodiesel after purification completely met German biodiesel standard DIN V 51606: 1997 and the physicochemical properties were stable. The acid value, density, viscosity and chemical compositions of biodiesel stored for 1 year were invariable.
Number of references:18
Main heading:Biodiesel
Controlled terms:Acids - Calcination - Catalysts - Methanol - Optimization - Ultrasonics - Zinc - Zinc alloys
Uncontrolled terms:Acid value - Biodiesel preparation - Biodiesel production - Catalyst concentration - Chemical compositions - Jatropha - Mg-Al hydrotalcite - Molar ratio - Optimized conditions - Physicochemical property - Process condition - Radialization - Reaction temperature - Tubular reactors - Ultrasonic power
Classification code:804.1 Organic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 921.5 Optimization Techniques - 802.3 Chemical Operations - 546.3 Zinc and Alloys - 523 Liquid Fuels - 753.1 Ultrasonic Waves
DOI:10.3969/j.issn.1002-6819.2010.02.049
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 64>
Accession number:20101512841298
Title:Experiments on microwave drying of carrot slices using pulsed electric field pre-treatment
Authors:Huang, Xiaoli (1); Yang, Wei (1)
Author affiliation:(1) Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650224, China
Corresponding author:Yang, W.
(wy1963@hotmail.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:325-330
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the effects of pulsed electric field (PEF) pre-treatment on microwave drying characteristics of carrot slices, according the experiment indexes of average drying rate and rehydration ratio of carrot slices, four factors (pulse frequency, electric field strength, microwave power intensity and thickness), quadratic regression orthogonal experiments on microwave drying of carrot slices with PEF pre-treatment were conducted. The curves of dehydration rate of microwave drying carrot slices were obtained. The equations of drying kinetics and indexes were gotten by regression analyzing with SPSS, and the indexes were synthetically optimized as well. The results showed that the Page's model was better for the microwave drying kinetics of PEF pre-treated carrot slices; the average drying rate was markedly influenced by pulse frequency and electric field strength; the rehydration ratio was markedly affected by pulse frequency, but it was not done by electric field strength. The optimal combinations of parameters were pulse frequency 30 Hz, electric field strength 2.0 kV/cm, microwave power intensity 1.0 W/g and thickness 4.0 mm. Under the optimal condition, the average drying rate and rehydration ratio of carrot slices were improved.
Number of references:20
Main heading:Drying
Controlled terms:Agricultural products - Curing - Dewatering - Electric field measurement - Electric fields - Electric network analysis - Experiments - Microwave devices - Microwave generation - Microwave heating - Microwave power transmission - Optimization
Uncontrolled terms:Carrot slice - Dehydration rates - Drying kinetic - Drying rates - Electric field strength - Microwave drying - Microwave power - Optimal combination - Optimal conditions - Orthogonal experiment - Page's model - Pre-Treatment - Pulse frequencies - Pulsed electric field - Quadratic regression - Rehydration ratio
Classification code:942.2 Electric Variables Measurements - 715 Electronic Equipment, General Purpose and Industrial - 802.2 Chemical Reactions - 802.3 Chemical Operations - 815.1 Polymeric Materials - 818.3 Rubber and Elastomer Processing - 821.4 Agricultural Products - 901.3 Engineering Research - 921.5 Optimization Techniques - 714.2 Semiconductor Devices and Integrated Circuits - 642.1 Process Heating - 701.1 Electricity: Basic Concepts and Phenomena - 703.1.1 Electric Network Analysis - 714.1 Electron Tubes - 706.1.1 Electric Power Transmission - 713.2 Oscillators - 714 Electronic Components and Tubes - 711.1 Electromagnetic Waves in Different Media
DOI:10.3969/j.issn.1002-6819.2010.02.056
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 65>
Accession number:20101512841252
Title:Design, construction and installation of large soil core lysimeters
Authors:Zhao, Changsheng (1); Hu, Chengxiao (1); Huang, Wei (1); Sun, Xuecheng (1); Tan, Qiling (1); Di, H.J. (2)
Author affiliation:(1) Key Laboratory of Subtropical Agricultural Resources and Environment of Agricultural Ministry, Microelement Research Centre of Huazhong Agricultural University, Wuhan 430070, China; (2) Center for Soil and Environment Quality, Lincoln University, PO Box 84, Canterbury, New Zealand
Corresponding author:Hu, C.
(hucx@mail.hzau.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:48-53
Language:English
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This paper describes the collection, installation and use of large undisturbed soil monolith lysimeters to study nutrient leaching under field conditions. Yellow-brown soil and fluvo-aquic soil, two typical soils in Hubei Province, Central China were selected to collect sixteen undisturbed soil monolith lysimeters and installed at a field facility in Huazhong Agriculture University. This design was developed to minimize disturbance of the soil core and use petrolatum to prevent edge flow. The lysimeters were 630 mm in external diameter and 700 mm in depth and made of PVC pipe of 10 mm wall thickness. The soil-filled cylinder was removed and set on a prefabricated base, which had drain holes and a fitting for attachment of the collection device. Leachate was collected and analysed for water quality. The results showed that there was no difference between the lysimeters in terms of drainage rate and no edge flow was detected. This design has been shown to be efficient and cost-effective.
Number of references:21
Main heading:Soils
Controlled terms:Design - Leaching - Lysimeters - Paraffin waxes - Polyvinyl chlorides - Soil surveys - Water pollution - Water quality
Uncontrolled terms:Brown soil - Collection device - Drain holes - Drainage rate - Edge flow - Field conditions - Field facilities - Hubei Province - Leachates - Nutrient leaching - PVC pipes - Soil cores - Typical soils - Undisturbed soils - Wall thickness
Classification code:943.3 Special Purpose Instruments - 533.1 Ore Treatment - 631.1 Fluid Flow, General - 802.3 Chemical Operations - 804.1 Organic Compounds - 815.1.1 Organic Polymers - 902.1 Engineering Graphics - 513.3 Petroleum Products - 453.2 Water Pollution Control - 453 Water Pollution - 445.2 Water Analysis - 408 Structural Design - 406.2 Roads and Streets - 483.1 Soils and Soil Mechanics
DOI:10.3969/j.issn.1002-6819.2010.02.009
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 66>
Accession number:20101512841306
Title:Recognition of navel orange contaminated by omethoate based on Vis-NIR spectroscopy
Authors:Li, Jing (1); Xue, Long (2); Liu, Muhua (1); Wang, Xiao (1); Luo, Chunsheng (1)
Author affiliation:(1) College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China; (2) College of Mechanical and Electronical Engineering, East China Jiaotong University, Nanchang 330013, China
Corresponding author:Liu, M.
(suikelmh@sohu.com)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:366-369
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The experiment acquired Vis-NIR of navel orange surface, which were sprayed with different concentration of omethoate pesticide. The prediction models of partial least squares (PLS) pesticide contamination were established using the four different spectral pretreatment methods of multiplicative scatter correction (MSC), standard orthogonal variable transformation (SNV), first derivative (FD) and second derivative (SD) by selecting the spectral range 430-1000 nm, 1 000-1 800 nm and 430-1 800 nm respectively. Comparing the results of experiment, it shows that the optimal model is obtained in the range of 430-1 000 nm and by the spectral data preprocessing method of FD. In the validation set, the correlation coefficient Rpred between the actual category and the predicted category of omethoate contamination degree on navel orange surface is 0.9817 and the root mean squared error of prediction samples (RMSEP) is 0.1564.
Number of references:12
Main heading:Nondestructive examination
Controlled terms:Contamination - Finite difference method - Infrared devices - Mathematical models - Near infrared spectroscopy - Pesticides - Principal component analysis
Uncontrolled terms:Concentration of - Contamination degree - Correlation coefficient - First derivative - Multiplicative scatter correction - Navel orange - Omethoate - Optimal model - Partial least squares - Prediction model - Pretreatment methods - Root mean squared errors - Second derivatives - Spectral data - Spectral range - Variable transformation - Vis-NIR spectroscopy
Classification code:931.3 Atomic and Molecular Physics - 801 Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 821.2 Agricultural Chemicals - 921 Mathematics - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 741.3 Optical Devices and Systems - 461.7 Health Care - 454.2 Environmental Impact and Protection - 423.2 Test Methods - 422.2 Test Methods - 421 Strength of Building Materials; Mechanical Properties - 714.2 Semiconductor Devices and Integrated Circuits
DOI:10.3969/j.issn.1002-6819.2010.02.064
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
<RECORD 67>
Accession number:20101512841270
Title:Shape optimization and sensitivity analysis for cylinder block of 4100QB diesel engine
Authors:Li, Min (1); Shu, Gequn (2); Liang, Xingyu (2)
Author affiliation:(1) School of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China; (2) State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Corresponding author:Li, M.
(limin@tju.edu.cn)
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:2
Issue date:February 2010
Publication year:2010
Pages:160-164
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:By using the method of shape optimization, the rigidity of 4100QB diesel cylinder block was raised based on HyperWorks/Optistruct software, meanwhile the sensitivity analysis of the cylinder block was carried out to illustrate the design variable effects on response function. There were three kinds of forces in optimizing course applied in various load steps: maximum combustion pressure, maximum piston lateral force and maximum lateral force on the main bearing. The objective of optimization was the maximum sum of modal frequency related to the modal shape of crankcase. Twelve structure dimensions of the crankcase were adopted as design variables and the constraint functions were strain energy of the cylinder block, point displacement and weight of the cylinder block. The results showed that strain energy and frequency of the cylinder block had been improved at various degrees. This optimizing method provides certain reference function for the optimizing of other kinds of cylinder blocks.
Number of references:16
Main heading:Shape optimization
Controlled terms:Crankcases - Cylinders (shapes) - Diesel engines - Engine cylinders - Finite element method - Sensitivity analysis - Strain energy
Uncontrolled terms:Combustion pressure - Constraint functions - Cylinder block - Design variables - Diesel cylinders - Lateral force - Modal frequency - Modal shape - Reference functions - Response functions
Classification code:921.6 Numerical Methods - 921.5 Optimization Techniques - 921 Mathematics - 931.1 Mechanics - 731.1 Control Systems - 612.1.1 Internal Combustion Engine Components - 408.2 Structural Members and Shapes - 612.2 Diesel Engines
DOI:10.3969/j.issn.1002-6819.2010.02.027
Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
期刊信息
- 主管单位 中国科学技术协会
- 主办单位 中国农业工程学会
- 主编 朱明
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