Based on the theory of commutation in DC machines, this paper describes a numerical analysis method for analysis of the commutation spark.
本文根据直流电机换向理论，给出了一种分析直流电机换向火花的方法。
Based on the theory of stability, a numerical analysis method of the membrane wrinkle is established, and the results are certified by experiments.
基于稳定性理论建立了薄膜褶皱的数值分析方法，通过实验的方法对分析结果进行了验证。
A numerical analysis method was presented to study the behavior of the laterally loaded pile considering the characteristic of the contact interface.
采用数值方法研究了桩土接触面特性对水平受荷桩受力特性的影响，并通过对工程实例的分析验证了计算方法的有效性。
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