近年来,有关专家系统(Expert Systems,简称为ES)的报道有增无减,研究成果引人瞩目。 ES是一种智能软件,它把有关领域的专家知识表示成计算机能够利用的形式,通过逻辑推理,使计算机能以和专家相近的水平,解决该领域中原来只有专家才能解决的复杂问题。 ES通常由知识库、推理机构、用户接口、专家接口和说明机构等五部分组成。其中以知识库和推理机构最为重要,是ES的 In recent years, reports of Expert Systems (ESs) have been on the rise, and the research results have drawn much attention. ES is a type of intelligent software that expresses expert knowledge in relevant fields into a form that can be used by computers. By logical reasoning, computers can solve complex problems that only experts can solve in this field at a level close to that of experts. ES usually consists of five parts: knowledge base, inference agency, user interface, expert interface and description organization. One of the most important knowledge base and reasoning agencies, ES