【作者】 郭鹏；

【导师】 何离庆；

【作者基本信息】 重庆大学 ， 检测技术与自动化装置， 2004， 硕士

【摘要】 专家系统是近年来发展十分迅速的一门重要学科。用农业专家系统指导农业技术改造和支持农业的发展是当前一项备受关注的工作。我国农业的科技含量低,农业信息技术的基础比较差,21世纪在我国推进智能化农业信息技术将会获得显著的经济效益和社会效益。论文以国家863计划智能计算机主题下的关键项目“智能化农业信息处理系统——重庆市示范区”项目为研究对象,对农业专家系统平台技术进行了系列研究。论文阐述了网络化、构件化农业专家系统开发平台的结构和功能,以及开发平台的关键技术、运行环境、接口标准和应用。分析了计算机网络的系统结构和智能化农业信息服务的需求特点,建立了基于Internet的计算机信息网络,并设计了信息平台的专家系统。基于构件理论和相关实现技术,研究了如何建立一个开放、灵活的专家系统体系结构,支持可制定、可组合、可协作的专家系统平台。将专家系统平台的构造问题分为功能构造、单专家系统构造和分布环境下的协同系统构造三类问题。依据构件化体系结构,对专家系统的各种典型的、先进的算法进行研究,采用了适合农业领域的典型专家系统的知识获取、维护、智能推理等算法。最后,给出了专家系统的具体实现。基于流行的网络技术,网上专家系统的结构体制采用了Web客户/服务器的软件模型。Web客户软件使用了Web浏览器Microsoft Internet Explorer (IE)。Web服务器软件使用了Microsoft Internet Information Server (IIS)。在此模式下,网上专家系统在Web服务器端进行了软件再开发:使用Active Server Pages (ASP) 和Component Object Model (COM) 对象实现了专家系统的功能。更多还原

【Abstract】 Expert system is an important subject which developing rapidly recent years. Using it to reconstruct and support agricultural development has become a very attentive work at present. Since the agriculture has lower content of technology and worse base of information technology in our country, advancing agriculture intellectualized information technology (AIIT) gains immense economic and social benefits in 21st century. So the research gets government’s support, recognition of science and technology dept., and the welcome coming from the grass roots. With the research object “handling system of Chongqing AIIT section” sponsored by 863, the article makes a series of research on platform-based agriculture expert system.In the article, the architecture and function of the platform for agriculture development are described. It supports network and component development Key techniques, running environment, interface standard, extension and application are expatiated. We have analyzed the system structure of computer network and the character of required services provided by AIIT, constructed internet-based computer agriculture information network and devised expert system matching it. An open and flexible architecture for general component expert system development platform based on author’s former expert system development works is proposed. This architecture supports customized, composed and cooperated developing for detail expert system designer. The expert system constructing problem is divided into three levels, they are constructing function component, composing single expert system and assembling distributed agent system. According with the analysis of the architecture of expert system platform, three software models to compose different layers of the expert system are built up.Finally, this article gave the implementation of the expert system. The software structure referenced the Browser/Server model in popular network techniques. The browser software was a Web browser, Microsoft Internet Explorer (IE). The server software was Microsoft Internet Information Server (IIS). In the model,expert system software developed secondly on the side of the server software; Active Server Pages (ASP) cooperated with Component Object Model (COM) in implementing the expert system.更多还原