The present theory can be applied to nonlinear geometrical and nonlinear physical crack problems for simple materials with internal variables or fading memory, within the framework of local theory.
本理论可应用于具有内变量或衰退记忆的简单物质在局部理论范围内的几何非线性和物理非线性裂纹问题。
Comparing the shape design method that is in common use currently, deducing the physical and geometrical optics theory, this article advanced a direct-shape method for the reflector.
本文综合比较了目前常用的赋形设计方法，并通过物理光学、几何光学理论公式的推导，提出了一种反射面直接赋形的方法。
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