There are four main parts in the dissertation: the first part is the introduction of the research background, purpose, object, significance, frame and approach.
本文的主要内容分为四大部分：第一部分是导论，介绍论文的研究背景、目的、对象、意义和研究框架及方法。
The evaluation knowledge of part manufacturability was expressed by the hybrid of frame and production rule based on an object oriented approach.
在评价知识的表示方面，采用了面向对象与产生式规则相结合的混合表示方法。
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