压力信号的功率谱密度具有频率波动范围窄、幅值大的特点；
They obey normal distributions. Distributions of power spectral density (PSD) for pressure signal display narrower frequency range and higher amplitude.
脉络波谱图分析查明了中范围（频率）信号波动的形态结构变化。
Venation wave spectrum analysis finds out shape-structure change of mid-frequency signal fluctuation.
根据波动理论，满足随机响应工程计算精度要求的有限元网格大小与待求高频随机响应问题的频率范围上限有关。
According to wave motion theory, finite element mesh size satisfying the needs of engineering calculating precision is relevant to the upper limit of frequency range of random (response) problems.
大口径涡街传感器频率范围很小，单位频率的对应流量很大，配套仪表显示流量的波动大，限制了大口径涡街传感器应用。
The frequency area of big caliber vertex flow transducer is small, frequency unit of flow is very big, the change of ration meter display is very large what confine its wide use.
大口径涡街传感器频率范围很小，单位频率的对应流量很大，配套仪表显示流量的波动大，限制了大口径涡街传感器应用。
The frequency area of big caliber vertex flow transducer is small, frequency unit of flow is very big, the change of ration meter display is very large what confine its wide use.
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