... second-order branching ==> 第二级分枝 second-order calculation ==> 二级近似计算 second-order central moment ==> 二阶中心矩 ...
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The expressions for calculating second order susceptibility are deduced, and the numerical calculation is performed.
推导了二阶极化率的表达式，并进行了数值计算。
This method could efficiently overcome the numerical oscillation and improve the calculation accuracy in spatial to second order.
普通的迎风差分格式只有一阶精度，修正的迎风差分格式可以把空间的计算精度提高到二阶。
The advanced first order and second moment iterative method are employed for calculation on reliability index and failure probability.
采用改进的一次二阶矩法对腐蚀管道的可靠性指标和失效概率进行了分析和计算。
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