With increasing longitudinal distance, the velocity PowerSpectralDensity (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。
2
The correlation between the standard classified road powerspectraldensity (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。
3
The wavefront powerspectraldensity(PSD) is being adopted for specifying the large optical component employed in high power density solid-state laser for inertial confinement fusion(ICF).