Traditional evaluation method of national economy is to make a decision at one time by the net present value, without considering the influence induced by the change of project environments.
传统的国民经济评价方法一般是根据净现值的大小一次做出决策，不考虑项目的内外部环境的变化对项目的影响。
It is found that the optimal value leaded by the presented optimization strategy is much better than which induced by the conventional Taguchi optimization method.
与传统正交试验的优化的结果相比，所设计的优化策略找到的优化值明显好于前者。
Using elementary method, digital function sum and its 8-th power means value formula was supposed and induced, an exact calculation formula was obtained.
采用初等方法，对二进制数字之和函数的八次均值的计算进行了猜想、归纳，得出了精确的计算公式。
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