Cost-benefit ratio criterion----No activity where the present value of net benefits is less than zero should be taken.
成本效益分比率准则——净利润现值低于零的无活力地区应该被承揽。
The at least one switch is operated at a second switching frequency if the calculated pulse ratio is less than a first pulse ratio value and greater than a second pulse ratio value.
如果所计算的脉冲比小于第一脉冲比值且大于第二脉冲比值，该至少一个开关以第二开关频率操作。
Results show that the ratio of calculated time to measured value is less than 2. After the modification of constrained cavity growth model, the calculated rupture time further appr...
采用受约束蠕变孔洞生长模型计算了不同试验条件下t 91钢的蠕变断裂时间，计算值与实测值相差不到2倍。
Results show that the ratio of calculated time to measured value is less than 2. After the modification of constrained cavity growth model, the calculated rupture time further appr...
采用受约束蠕变孔洞生长模型计算了不同试验条件下t 91钢的蠕变断裂时间，计算值与实测值相差不到2倍。
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