The correlation between the standard classified road power spectral density (PSD) and international roughness index (IRI) was discussed by using regressive analysis.
通过回归分析的方法对标准分级道路功率谱密度与相应国际平整度指数之间的关系进行了研究。
They obey normal distributions. Distributions of power spectral density (PSD) for pressure signal display narrower frequency range and higher amplitude.
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；
The use of Fourier analysis techniques to measure the wavefront power spectral density (PSD) in mid frequency domain is discussed.
波前功率谱密度 （PSD）被用于评价惯性约束聚变激光驱动器光学元件在中频区域的波前误差。
The wavefront power spectral density(PSD) is being adopted for specifying the large optical component employed in high power density solid-state laser for inertial confinement fusion(ICF).
波前功率谱密度（PSD）被用于评价惯性约束聚变（ICF）激光驱动器光学元件中频段的波前误差。
Then, the power spectral density (PSD) of the acceleration at ground level is evaluated by an iterative approach according to the principle of equivalent peak acceleration.
然后，根据加速度峰值等效原则，选代计算得到地面的加速度功率谱密度曲线；
Then they were imported to MATLAB and calculated to obtain the power spectral density(PSD).
将数字声波信号导入MATLAB软件进行处理，得到其功率谱密度图。
The wavefront power spectral density (PSD) is being adopted for specifying the large optical components employed in high power density solid state laser for inertial confinement fusion (ICF).
波前功率谱密度（PSD）被用于评价ICF激光驱动器光学元件在中频区域的波前误差。
With increasing longitudinal distance, the velocity Power Spectral Density (PSD) peak shifted to lower frequencies.
随着流向距离的增大，速度功率谱(PSD)曲线呈现峰值向低频移动的现象。
With increasing longitudinal distance, the velocity Power Spectral Density (PSD) peak shifted to lower frequencies.
随着流向距离的增大，速度功率谱(PSD)曲线呈现峰值向低频移动的现象。
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