【作者】 邓林义；

【导师】 蒋文科； 邝朴生；

【作者基本信息】 河北农业大学 ， 农业机械化工程， 2003， 硕士

【摘要】 农业专家系统，是一种运用知识工程技术，结合多媒体、信息网络等多方面高新技术，综合一个或多个农业专家提供的特殊领域知识、经验进行推理和判断，就某一类复杂农业问题进行决策的计算机系统。本文介绍了保护地蔬菜栽培专家系统的设计与实现。在专家系统的建造过程中，结合面向对象的建模方法——UML建模方法，简化系统的建模过程，提高了系统设计的效率，促进了系统设计的规范性、实用性和先进性。本文针对诊断和预测知识本身的特点采用了一种适合推理机的树状和网状的知识表示方法。长久以来，由于农业知识繁杂，不能进行有效的分类，造成知识库大量的冗余，数据仓库是一种面向主题的、集成的、随时间而变化的、持久的数据集合。本文在构造知识库的过程中对综合数据库中的知识，经过面向主题的分析以后，存放在知识库中，完成了知识的抽取，提高了知识库的使用效率，简化了推理过程。保护地蔬菜栽培专家系统为系统用户提供了良好的人机界面，领域专家可以独立地对系统的综合数据库进行维护，专家系统可以为系统的最终用户提供各种病虫害的防治对策，系统地介绍了蔬菜栽培过程中的各种栽培和管理技术。更多还原

【Abstract】 Agriculture expert system - agricultural intelligent system is a computer system which adopted Knowledge Engineering. It combined sophisticated high technology such as the multimediax information network and knowledge acquisition, integrated the special knowledge and experience which be offered by one or more agricultural experts to simulate the decision-making course of complicated agricultural problem. This thesis introduced the research and development of protected horticulture Expert system of vegetable planting. During the building process of expert system, it combined the oriented modeling- method - UML, simplified the process of modeling, improved the design efficiency , standardization and practicability of the system.Knowledge representation is the formalization of knowledge. It not only redounds to agricultural expert summarizing the system knowledge, but also can improve the efficiency of inference engine. This thesis, with the characteristic of knowledge in diagnosing and forecasting, adopted a knowledge representation with tree-mode or reticulation which be fitted to inference engine. For a long time, agricultural knowledge is so complicated that it can’t be classified effectively, making knowledge-database redundant largely, Data Warehouse is an data aggregation which including knowledge decision-making, subject-orientation, integration, variation promptly and permanence. This thesis put the knowledge of integrated database into the knowledge-database after analyzing the Subject-Orientation during the construction of knowledge-database, completing the operational efficiency of knowledge-database, simplifying the process of inference. Expert system of vegetable planting of dependency provided the friendly user interface. Through the maintenance of the integrated database by the Domain expert, the system can provide a variety of preventive advice and can introduce the planting and management technology systemically during the planting course of vegetable.更多还原