在专家系统中利用关系数据库来表达知识

在专家系统中,传统的知识表达方式具有很大的局限性,知识的重复利用率不高,并且无法给出知识的关系。为了解决这个问题,文章利用关系数据库的特点,将知识存贮在数据库中,并结合推理机的工作原理,阐明了如何利用标准数据查询语言(SQL)来对知识库进行正向推理及反向推理。从而提高了推理机的效率,减少知识获取的开销,增强知识库的可维护性和扩展性。

Using Relation Database to Express Knowledge in Expert System

In an expert system,the conservative expression of knowledge is greatly limited,which brings about the low efficiency in reusing knowledge and causes failure in expressing the relation between knowledge.Therefore,two points of view are discussed in this paper.The first is the storage of knowledge into database on the basis of features of the re-lation database.The next is how to use SQL for the forward and backward reasoning of database with the reference of reasoning mechanism.It significantly improves the efficiency of reasoning,reduces the cost of knowledge acquisition and makes the expert system flexible.