Intermediate frequency instability has had the most uneven history.

中频不稳定性的研究经历了极为曲折的道路。

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Low and intermediate frequency instability models are taken up first.

首先处理低频和中频不稳定性的模型。

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A formula for analyzing the low frequency instability of the tube grain engine is derived through theoretical study.

通过研究导出一个分析管状装药发动机低频不稳定性的关系式。

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Closely related to this third group of activities is a critical question that we as a country now face: how to strengthen our financial system, including our system of financial regulation and supervision, to reduce the frequency and severity of bouts of financial instability in the future.

FORBES: Reducing Systemic Risk