The distribution of the interior transient magnetic fieldfirstly needs to be calculated, then the transient characteristics of the machine will be analysed accurately.
首先要准确细致地分析电机内部瞬态磁场的分布，然后才可以方便地计算电机的瞬态特性。
The charge on the conductor needs to be calculated while extracting distributed capacitance parameter of transmission lines, and generally there is the singular problem of reentrant corners.
传输线电容参数提取过程中需要计算导体上的电量，而在电量计算过程中普遍存在着角点的奇异性问题。
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