One of them is to find the minimum of a maximum of a function when the variables are not independent, and that is the method of Lagrange multipliers.

其中一个是找出一个函数的极小值，极大值，这个函数的变量是相关的，这种方法称为拉格朗日乘数法。

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The method is a very fast and stable refinement technique that makes for the nearest merit function minimum, and it is particularly suitable for the adjustment of an already useful design.

详细介绍了非线性单纯形方法的算法思想，非线性单纯形方法是一种能够快速、稳定地寻找到评价函数最小值的优化算法，特别适合于对已有的设计进行调整。

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One method was getting the maximum and the minimum of the structural performance function by optimization, and then calculating the ratio of mean-value to deviation of the performance function.

一种方法是先优化得到结构功能函数的最大和最小值，再计算功能函数均值和离差的比值；

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