【摘要】 本文分析了网架结构初步设计领域的知识结构；论述了ESST系统中知识获取的方式和主要步骤，提出了用规则、框架、规则／框架相结合的知识表示方法；介绍了建造知识库时所采用的几种优化技术，如规划、树结构、元知识利用等，对建造知识库的理论做了有益的探讨．更多还原

【Abstract】 This paper hsa analyzed knowledge structure in preliminary design of truss structure anddiscussed the ways and main steps of Knowledge gain in the ESST. It proposes a method ofknowlege representation based on rule,frame, rule-frame and introduces some Optimizationtecthniques utilized during knowledge base building such as programme,tree structure,chiefknowlege, etc.更多还原