This paper presents a sequential approximation method specifically for engineering optimization problems with the three characteristics.
本文提出了一种连续的近似方法，专门为工程优化问题的三个特点。
The improved approximate expressions are proposed to create the sequential approximation problems which are solved with the constrained variable metric method.
用该近似函数形成结构优化原问题的序列近似问题，再用约束变尺度法解近似问题。
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