在理论上没有一般性的解析表达式，无论是薄板还是厚板，本文由边界积分法给出了一般封闭解析解的表达式。

There is no universal analytic formula in theory. This paper offers the universal analytic formula for thin and thick plates with the method of edge integration.

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针对博士CAD系统中帮助系统的开发进行了理论上的研究，提出了设计在线帮助的一般性的原则，重点探讨了设计过程中的主体思想。

Describes how to develop the on-line help system for doctor CAD system and brings forward some general principles of designing such a system. It also gives the main idea of the design process.

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