On the aspect of creating mathematics and mechanics model, the modernistic design method such as inverse-do engineering, optimization design, CAD was adopted.

在推导数学模型和力学模型方面，借助了反求工程、优化设计、计算机辅助等现代设计方法。

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Using value engineering theory and fuzzy mathematics theory, the paper establishes design change scheme and construction methods change scheme evaluation model.

因此运用价值工程原理和模糊数学原理建立了设计变更方案和施工方案变更方案的技术经济评价模型。

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The steel structure design CAD is a complicated and huge system project dealing with Mathematics, Engineering Mechanics, Architecture and Computer Graphics.

钢结构设计CAD是一项复杂、大型的系统工程，涉及到数学、工程力学、建筑学、计算机图形学等多种学科。

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