计算机应用论文基于GSM的农业专家咨询系统.doc

基于gsm的农业专家咨询系统 基于gsm的农业专家咨询系统 the agricultural expert consultation system based on gsm【中文摘要】 专家系统是一种智能系统,是一个具有大量专门知识与经验的计算机推理系统。它应用人工智能技术,依据一个或多个专家提供的特殊领域知识、经验进行推理和判断,模拟专家就某一复杂问题进行决策。目前,专家系统在各个领域中已经得到广泛应用,例如农业专家系统等。在专家系统中,由专家整理出来的知识大多属于这个领域的浅层知识,形式上也主要是条件规则型知识。我国目前的农业专家系统多数是静态的,由于专家系统并不具有真正的学习能力,结果导致系统的表现是只能处理人类专家见过的各种情况,不能“随机应变”,人工智能面临严峻的考验。为了克服现有的专家系统的推理简单,知识库不能动态变化,现场处理能力弱及无法充分利用网络实现网络化远程服务等问题,开发了一种新的基于gsm的农业专家咨询系统,可实现专家系统知识库的动态变化及通过网络处理当前专家系统无法解决的问题,并能利用移动智能终端实现现场处理。本系统采用移动版数据库,利用microsoft sql server mobile edition和2005进行开发。本系统采用具有gsm功能的移动智能设备,运用microsoft的.net架构设计专家系统。系统包括概述、推理、浏览、连接四部分。专家系统推理机采用遗传规划算法(gp)增加推理能力。针对无法解决的问题,利用gsm网络的sms短消息功能将当前环境及作物生长状态等数据以规定格式发送到咨询中心,由专家进行分析处理并以短消息模式将结论发回现场的移动智能设备;设备接收到短消息后,可直接导入到数据库,由此完善专家系统知识库,增加了数据库的完整性和该系统的普适性。本系统结构采取模块化方式处理,根据具体的作物种类随时方便的更换知识库、数据库,而不影响其它模块。本系统可通过不修改程序,实现针对不同作物的具体处理;利用gp算法,提高了专家系统的处理复杂情况的能力和分析的准确性;运用gsm网络,实现了专家系统的网络化服务,提高了现场处理问题的能力;系统搭载平台为移动智能终端,便于携带和现场处理。 【英文摘要】 expert system is a kind of intelligent system; it is a computer inference system which has a great amount of special knowledge and experience. based on artificial intelligence technology, it could deduce and judge according to special field knowledge and experience that offered by one or more experts, so that it simulating expert carries on decision on a certain complicated problem .at present, the expert system has been widely used in many field, such as agricultural expert system.for the expert system, the knowledge arranged by experts mostly belongs to the shallow knowledge in this field, and is mainly rule-based knowledge in formal conditions. at present, most of the agricultural expert systems are static in our country. because the expert system does not really have the ability to learn, the performance of the system is that it can only deal with a variety of conditions which had been treated by human experts, unable to “adapt”, artificial intelligence confronted with a serious challenge.in order to overcome the problems of the existing expert system, such as the speculative simplicity, poor capacity on-site, disability to take full advantage of network to realize remote network services and knowledge base could not change dynamically, it develops a new gsm-based agricultural expert advisory system to implement dynamic changes of the knowledge base, through the network to deal with the current insoluble problems of the existing expert system, and to realize treatment at the scene using the mobile intelligent terminal. the system adopts the database of a mobile version and is developed with microsoft sql server mobile edition and 2005.the system adopts gsm-enabled mobile intelligent devices and uses the microsofts net architecture to design the expert system. system includes four parts: overview, reasoning, browsing, and connecting. expert system reasoning engine applies genetic programming (gp) to improve the reasoning ability. aiming at insurmountable problems, the use of gsm network sms short message function of the environment and the current crop status and other data to form sent to the counseling centers, an analysis by experts, and deal with the short message mode to the conclusion back to the scene of mobile smart devices ; equipment after receiving a short message can be directly imported into the database, thus improving the expert system knowledge base, an increase of database integrity and universality of the system. the system structure adopts the modular mode, changes the knowledge base and database at any time and conveniently according with the specific types of crops without affecting the other modules.the system can implement the specific treatment of different crops without amending the procedures and improve the expert systems ability to deal with complex situations and the analysis accuracy with the use of gp algorithm.also it can realize the expert system network services and improve the ability to deal with problem at the scene with the use of gsm network. the platform in this system is a mobile intelligent terminal which is portable and can realize on-site treatment. 【中文关键词】 gsm; 专家咨询系统; 模块化处理方式; gp算法; 移动智能设备 【英文关键词】 gsm; expert advisory system; modular mode; gp algorithm; mobile intelligent devices 【论文目录】摘要 4-5 abstract 5-6 1 引言 9-15 1.1 课题背景及意义 9-10 1.2 农业专家系统的发展概况 10-13 1.2.1 国外发展概况 10-11 1.2.2 国内发展概况 11-12 1.2.3 农业专家系统当前存在的问题 12-13 1.3 课题研究主要内容 13-15 2 专家系统 15-21 2.1 专家系统结构及基本功能 15-17 2.1.1 专家系统的定义 15 2.1.2 专家系统结构 15-17 2.1.3 专家系统的基本功能 17 2.2 专家系统原理及特征 17-19 2.2.1 专家系统基本原理 17-18 2.2.2 专家系统基本特征 18-19 2.3 专家系统的分类 19-21 3 基于gp 的不确定性推理算法研究 21-27 3.1 gp 算法简介 21 3.2 gp 算法原理 21-24 3.3 gp 推理算法研究 24-27 3.3.1 算法设计 24-26 3.3.2 算法流程 26-27 4 双重专家系统设计 27-43 4.1 基于pc 的专家系统设计 27-36 4.1.1 基于pc 的知识库构建 27-31 4.1.2 基于pc 的数据库的构建 31-33 4.1.3 基于pc 的推理机设计 33-36 4.2 基于pda 的专家系统设计 36-43 4.2.1 基于pda 的知识库构建 36-41 4.2.2 基于pda 的推理机设计 41-43 5 基于gsm 的专家咨询系统设计 43-52 5.1 gsm 概述 43-45