Based on Normal Mode theory, the explanation of sound field fluctuation characteristic caused by internal waves is given.

基于声简正波理论，给出了内波导致声场起伏特性的一般理论解释。

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Sound power determination in reverberation chambers is discussed in the light of normal mode theory. Rigorous as well as statistical formulas are found, and the aged problem of.

用简正振动方式理论分析了混响室内声功率测定问题，求得了严格公式和统计公式，解决了测试中多年未有定论的问题。

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According to social network analysis theory, a large number of abnormal behaviors are always hidden in the normal mode of behavior.

根据社会网络分析理论，异常行为总是隐藏在大量的正常行为模式中。

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