摘要： 知识库是专家系统的核心，如何检索到所需要的知识对系统运行性能有重要影响，文章认真分析了鱼病专家的诊断知识，提出了将专家知识分为规划层—策略层—物理层3层的层次结构，为实现元推理提供了一种机制，从而实现了将规划知识、策略知识与知识库分离。该文旨在探讨一种合理、有效的知识管理方法，为专家系统的成功运行提供性能的保障。

关键词: 推理, 知识策略, 诊断

Abstract: The repositories are the kernels of expert system, and the efficiency and reality of knowledge retrieve have great effect on the performance of system. This paper analyses knowledge of expert of fish disease, and proposes a strategy-tactics-physical three-layered structure, and provides a mechanics in order to realize metareasoning, and divide strategic and tactics knowledge from knowledge-base. The aim is to seek an efficient and reliable method of knowledge management from repositories to support the running of expert system successfully.

中图分类号: 

• TP182