... frequency频率 frequency density频率密度 frequency distribution频率分布 ...
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相位躁声功率频密度 phase noise power spectrum density
噪声功率频谱密度 noise spectral power density ; noise ashen power density
功率频谱密度 power spectrum density ; PSD
极低频功率密度 very low frequency power density ; VLF
水流密度频率 channel frequency
频谱功率密度 Power Spectrum Density
功率频谱密度值 Power spectrum density
的功率频谱密度 Power Spectral Density
并做功率频谱密度 power spectrum density
用有限元法建立了圆筒谐振子的模型，通过MATLAB软件编程，计算出合理的谐振子参数，对其频率密度特性进行了分析，并给出了振子的振型分布。
FEM Model is made and programmed in MATLAB, reasonable size is worked out, relation between frequency and density is analyzed, and the vibratory mode shape is given.
Friedman的服务价格将面积，频率，甚至“人口密度”都计算在内。
Friedman's pricing formula takes into account square footage, cleaning frequency, and "population density."
详细地讨论了微分吸收激光雷达测量气体密度时中心频率的漂移所引起的测量误差。
The measurement error of differential absorption laser radar caused by the shift of its center frequency in measuring atmosphenc density has been discussed particularly.
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