由于谐振网络的品质因数比较低，以往常角的基波近似分析法准确性差。
Since the Q of the resonant network in often low, the analysis in the form of fundamental sinusoidal approximation is not accurate enough.
两相流不稳定性理论分析方法可以分为两大类：一类是数值解析法，另一类是近似分析法。
Theoretical approach of two-phase flow instability can be divided into two categories: numerical analysis and approximation analysis.
就提出的控制器介绍了近似频域分析法，作为控制器参数选择的指南。
The approximate frequency domain analysis of the proposed controller is presented, which served as a guide for the controller' s parameters selection.
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