Clear skies are detected firstly by peak frequency density of ratio (PFDR) method.
首先采用比值概率密度峰值法，初步选出晴天时刻。
The leading-edge serrations have no effect on the instability noise peak frequency.
前缘锯齿对边界层不稳定噪声峰值频率没有影响。
Ferromagnetic resonance frequency change might lead to signal attenuation peak frequency corresponding change.
亚铁磁共振频率的改变会引起信号衰减峰值出现频率的相应改变。
The example shows that the energy of vibration respondence is mainly distributed over the peak frequency of the wave force.
算例表明，振动响应的能量集中分布在波浪载荷的峰值频率处。
Analysis of harmonic response found out the peak frequency of the joint possible to resonate and the stress and strain under peak frequency.
谐响应分析主要是研究联轴器的幅频响应特性，分析其可能的共振峰值频率以及峰值频率下的应力应变情况。
Caleulation shows that there is a peak frequency in these spectrums and the frequency depends on turbulent outer scale and transversal wind.
计算表明这些频谱中存在一个与湍流外尺度、横截风速有确定关系的峰值频率。
Studied two conditions of acoustic signals when it was single-phase gas and two-phase flow in the pipeline from sound spectrum, acoustic energy, peak frequency and amplitude.
分别从声波频谱，声波能量，峰值频率，以及幅值等方面对管道内为单相气体和两相流体两种状态下的声波信号进行了研究。
Studied two conditions of acoustic signals when it was single-phase gas and two-phase flow in the pipeline from sound spectrum, acoustic energy, peak frequency and amplitude.
分别从声波频谱，声波能量，峰值频率，以及幅值等方面对管道内为单相气体和两相流体两种状态下的声波信号进行了研究。
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