以最低制造成本为优化目标，介绍了求解装配尺寸链的综合因子法、最低成本法和线性规划法，为合理分配装配尺寸链中各环公差提供参考。

By taking the minimum cost as optimization aim, the synthetic factor method, minimum cost method, and linear programming method of solving assembled dimensional chains are introduced.

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本文针对设置有对称斜腹杆的钢筋混凝土框架-桁架结构，运用非线性规划方法拟牛顿乘子法，对框架-桁架结构体系中斜撑的刚度进行优化。优化结果可供工程设计参考使用。

In this paper, a nonlinear planning method, quasi Newton multiplier method, is introduced for the optimization of the bracing stiffness in braced frame structures with symmetric bracings.

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