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亚洲精细农业与计算机农业应用联合大会

作者： Weizhe Feng 1 Daoliang Li 2 Yanqing Duan 3 Zetian Fu 2 1 International College at Beijing china Agricultural University Beijing P. R. china 100083 2 College of information and Electrical engineering china Agricultural University Beijing P. R. china 100083 3 Business School University of Bedfordshire Luton LU1 3JU UK

The concept of stickiness in this study was borrowed from information research literature, which indicated the complex and difficulties in all process of knowledge transfer that including knowledge acquisition. To reveal the stickiness of agriculture knowledge acquisition in china, a survey was conducted of agriculture related websites in china. Firstly, an intensive literature review was done for collecting attributes closely associated with agriculture knowledge and its acquisition process. Secondly, these attributes were cate- gorized and transformed into questionnaire and surveyed in 14 provinces in china. Thirdly, the data were tested with principal component analysis methods. As results, this study concluded that four factors that may affect the stickiness of agriculture knowledge, namely, difficulty, special tacitness, available explicitness, and proven knowledge;five factors that may affect stickiness of agriculture experts. They include attitudes, professional, expression capability, teamwork, and protectiveness;and five factors that may affect stickiness of agriculture institutions, attitudes, service orientation, distance, protectiveness, and professional. In conclusion, it was suggested that the three groups of principal factors can be used to guide the planning and assessment of ICT-based knowledge projects in rural areas. The study also highlighted a new area for ICT-based information and knowledge transfer research.

关键词： stickiness agriculture knowledge acquisition principal component analysis

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An Internet-Based Expert System Platform for Assistant Identification of Agricultural Pests

An Internet-Based Expert System Platform for Assistant Ident...

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第三届国际计算机及计算技术农业应用学术会议

作者： Qiang Li Zuorui Shen Lingwang Gao IPMist Lab College of agriculture and Biotechnology china Agricultural University Beijing P.R.china 100193 Huiyong Yang Wei Liu Jian Qiao Taiyuan Application technology Developing center Taiyuan Shanxi Province P.R.china 030009

＜正＞The Internet provides a fertile ground for research and development of intelligent software *** Internet-Based Expert System was designed to be a platform or tool for experts to organize the knowledge related to the agricultural pest species/category and their characteristics according to their features and to establish the application expert *** system developed in PHP with AJAX is based upon a Server/Browser（S/B） architecture which employs a user interface that is accessible with standard web *** hierarchical Structures are employed to organize the knowledge related to the pest species/categories and characteristics in the system,which can make it easier for the experts to manage,such as add,delete or modify,the information of pest insects and diseases and their characteristics in the knowledge-base. Experts can also connect the species/category information to the characteristics in the database as the reference rules for the reference engine in the *** application expert system could be established on the platform system,and can provide services for the identification of the agricultural pest insects and diseases to common users,it is easy for an ordinary person to tell accurately what the pest is, regardless of their lack of the professional knowledge of the *** it can be constantly expanded without any limitation.

关键词： Expert System Internet Dendriform Hierarchical Structure Agricultural Pests Identification

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ZERO POINT DRIFT COMPENSATION OF IMPACT-BASED GRAIN FLOW SENSOR WHEN COMBINE HARVESTER TILTED

ZERO POINT DRIFT COMPENSATION OF IMPACT-BASED GRAIN FLOW SEN...

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亚洲精细农业与计算机农业应用联合大会

作者： Hu Junwan 1 Luo Xiwen 1 Chen Shuren 2 Li Yaoming 2 Yang Hongbo 2 1 Key Laboratory of Key technology on Agricultural Machine and Equipment Ministry of Education. South china Agricultural University Guangzhou 510642 china 2 Key Laboratory of Modern Agricultural Equipment and technology Ministry of Education Jiangsu University Zhenjiang 212013 china

For assessing effectiveness of precision farming operations, the yield map plays a very important role and it must reflect the true variation of yield in the field. As the most important component of a yield monitor system, it is desirable that the grain flow sensor exhibit a long term accuracy and stable zero-point voltage in different operation states without recalibration. The impact-based grain flow sensors, widely used in several commercial yield monitor systems, fail to give stable accuracy when the combine tilted. The purpose of this paper is to study the effects of combine harvester tilt on the zero point drift of impact-based grain flow sensor,and propose an innovated grain flow sensor design that can compensate the effect of combine harvester tilt on the zero point voltage. With the single plate impact-based grain flow sensor and a electronic campus fixed in a KUBOTA Pro-481 head-feed combine harvester, the zero point voltage of the grain flow sensor was detected while the combine harvester tilted between -15°and +15°. The result showed that there was a linear relationship between the zero point voltage and combine the obliquity, the zero point drift voltage was ±25mV when the combine harvester was tilted at ±15°. With two identical plates were mounted in parallel in front of the outlet of the combine harvester, a dual-plate differential impact-based grain flow sensor was designed to compensate the influences of zero point drift lead by combine tilt. The front plate of the new sensor was used to detect the impact of grain out of elevator, but the zero point corrupted by the pose of combine, and the rear plate was used to detect the zero point drift simultaneously. A differential algorithm could compensate the zero point drift of the new sensor. The experimental results showed that the zero point drift of 2 plates were the same as each other, and thus the overall zero point drift voltage was reduced from ±25mV to ±1mV when Combine tilted at ±15°.

关键词： Impact-based grain flow sensor tilt zero point drift compensation

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MODELING AND DESIGNING OF A NONLINEAR TEMPERATURE-HUMIDITY CONTROLLER USING IN MUSHROOM-DRYING MACHINE

MODELING AND DESIGNING OF A NONLINEAR TEMPERATURE-HUMIDITY C...

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The Second IFIP International Conference on Computer and Computing Technologies in agriculture (CCTA2008)

作者： Xiuhua Wu* Haiyan Luo Minhui Shi information and Electrical engineering Institute Shenyang Agricultural University Shenyang 110161 china

Drying-process of many kinds of farm produce in a close room, such as mushroom-drying machine, is generally a complicated nonlinear and time- delay cause, in which the temperature and the humidity are the main controlled elements. The accurate controlling of the temperature and humidity is always an interesting problem. It’s difficult and very important to make a more accurate mathematical model about the varying of the two. A math model was put forward after considering many aspects and analyzing the actual working circumstance in this paper. Form the model it can be seen that the changes of temperature and humidity in drying machine are not simple linear but an affine nonlinear process. Controlling the process exactly is the key that influences the quality of the dried mushroom. In this paper, the differential geometry theories and methods are used to analyze and solve the model of these small- environment elements. And at last a kind of nonlinear controller which satisfied the optimal quadratic performance index is designed. It can be proved more feasible and practical than the conventional controlling.

关键词： nonlinear controller mathematical model temperature-humidity control mushroom-drying machine

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基于应用服务器的电子农务平台研究与实现

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微机发展 2004年第1期14卷 75-78页

作者：吴华瑞王之岭杨宝祝孙想国家农业信息化工程技术研究中心北京100089

以分布对象技术为基础,重点研究了分布构件技术的特征和实现机制。以面向农业的大型分布式应用的复杂计算需求为背景,研究了构件的应用管理、配置管理和性能管理等问题。在此基础上,研制一个与J2EE规范兼容的电子农务开发和运行平台。... 详细信息

以分布对象技术为基础,重点研究了分布构件技术的特征和实现机制。以面向农业的大型分布式应用的复杂计算需求为背景,研究了构件的应用管理、配置管理和性能管理等问题。在此基础上,研制一个与J2EE规范兼容的电子农务开发和运行平台。平台支持对新一代电子农务应用的开发、部署和管理,使各种异构系统间交换信息成为可能。平台的集成框架满足了农业领域各个层次人员的需求,有利于解决农业生产过程中的科技成果传播瓶颈问题。

关键词：电子农务平台应用服务器智能化信息技术计算机农业

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维普期刊数据库

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CURRENT SITUATION AND DEVELOPMENT STRATEGY FOR YANTAI AGRICULTURAL informationIZATION

CURRENT SITUATION AND DEVELOPMENT STRATEGY FOR YANTAI AGRICU...

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Progress of information technology in agriculture

作者： Ding Jianhua Xin Xianjie Shao Wenzhao Yantai Science&technology information Institute Post Code: 264000 Yantai china

＜正＞ Based on analyzing and studying the current developed situation of Yantai agricultural informationization, this article points out the development goal, key fields and relevant measures for agricultural informa... 详细信息

关键词： agricultural informationization Yantai City development strategy

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Multilevel Recycling Waste Water of Raising Pigs Based on Local Farming Model and Its Effect Evaluation

Multilevel Recycling Waste Water of Raising Pigs Based on Lo...

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2012年环境污染与大众健康学术会议

作者： Yuandong XIAO 1,2 , Xiaozhen LIU 3,4 , Chunli LUO 1 , Yue LIANG 3,4 ,Xu CHEN 1 ,Ming XU 3,4 1、College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045, P.R. china 2、agriculture and Ecology engineering research center of Po-yang Lake Watershed,Nanchang 330045, Peoples Republic of china 3、Key Lab. of Poyang Lake Environment and Resource Utilization, Nanchang University, Ministry of Education, Nanchang 330047, P.R.china 4. College of Environmental Science and engineering, Nanchang University, Nanchang 330031, P.R. china

A large-scale pig farms in Jiangxi Province was researched ,a model of resource utilization for breeding wastewater was established with methane tank →clarifier →reservoir breeding →farmland irrigation. The results showed that the concentrations of COD, ammonia nitrogen and total phosphorus of the treated wastewater were 59.13mg/L,1.15mg/L and 0.015mg/L respectively , the degradation rates of which were 24.2%,99.34%,93.85% separately. The fish bait of reservoir for fish culture was saved by discharging certain concentration wastewater into it while the organic matter in the aquiculture wastewater was degraded by ecosystem. The reservoir water was used later as irrigation water and organic matter in the aquiculture wastewater was degraded thoroughly, which decreased the cost of discharging sewage from farms, eliminating pig emission pollution to the environment and increasing crop yields. The above model was an ecomodel, not only treating cultivating wastewater but also recycling the waste water. The management of piggery wastewater and monitoring of reservoir water quality were suggested in order to avoid water eutrophication.

关键词： Piggery wastewater Reservoir Field irrigation Resource recycling

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软件工程过程RUP研究

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微机发展 2004年第4期14卷 62-64页

作者：惠建华赵春江吴华瑞王万森国家农业信息化工程技术研究中心北京100089 首都师范大学计算机系北京100037

随着软件开发过程的日趋复杂,软件开发过程难以得到有效控制,软件产品质量难以得到保证。而软件工程过程RUP采用面向对象的方法,在需求管理、分析设计、配置及变更管理等方面为开发人员提供准则和相应的管理工具。在实际的软件开发过程... 详细信息

随着软件开发过程的日趋复杂,软件开发过程难以得到有效控制,软件产品质量难以得到保证。而软件工程过程RUP采用面向对象的方法,在需求管理、分析设计、配置及变更管理等方面为开发人员提供准则和相应的管理工具。在实际的软件开发过程中应用RUP可以提高软件开发组织的生产效率,提高软件质量,降低软件开发成本,减少软件开发风险。同时RUP也吸收了多种开发模型的优点,具有很好的可操作性和实用性,应用RUP能够达到软件工程研究所制定的CMM(CapabilityMaturityModel)模型的2级或3级。

关键词：软件工程软件开发过程面向对象 RUP 瀑布模型

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维普期刊数据库

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DETECTING MOISTURE CONTENT OF SOUTHERN SOIL IN china USING NEAR-INFRARED SPECTROSCOPY

DETECTING MOISTURE CONTENT OF SOUTHERN SOIL IN CHINA USING N...

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亚洲精细农业与计算机农业应用联合大会

作者： Feng Yaoze 1 Li Xiaoyu 1 Li Peiwu 2 Lei Tingwu 3 Wang Wei 1 Xiao Wu 1 Zhou Zhu 1 1. College of engineering and technology Huazhong Agricultural University Wuhan china 2. Oil Crops research Institute Chinese Academy of Agricultural Sciences Wuhan china 3. Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources Yangling china

Three types of Southern soil （yellow-brown soil, paddy soil and alluvial soil） were studied based on NIR spectra. Soil moisture analysis model of pretreated soil samples was established by PLS, with R 2 =0.9946 and 0.9919 and RMSECV=0.801%, RMSEP=0.912% for validation and prediction, respectively. 12 unpretreated soil samples were predicted by re-established PLS model based on Kennard-Stone algorithm,with average absolute error reducing from 0.78 % to 0.42 %, which showed that the soil sample space expansion method can improve model prediction accuracy.

关键词： NIR soil water content PCA PLS Kennard-Stone algorithm

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research AND DESIGN OF RURAL information SERVICE PLATFORM BASED ON SOA

RESEARCH AND DESIGN OF RURAL INFORMATION SERVICE PLATFORM BA...

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The Second IFIP International Conference on Computer and Computing Technologies in agriculture (CCTA2008)

作者： Jiang Zou Lu Yang* Ruizhi Sun College of information and Electrical engineering china Agricultural University No. 17 Qinghua Dong Lu Haidian Beijing 100083 china

The paper mentioned using SOA framework and the technology of Web Service, aiming at the problem of "information Isolated Island", specifically for rural information resources, an agricultural information service platform is constructed based on SOA and Web Service. This platform integrates distributed systems and service platforms and it deals with agricultural information by cooperative processing.

关键词： web service SOA information integration

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