Finally, we analyze effect of porosity (equals background porosity add high-frequency components of porosity) on P and S wave velocities and on RMS velocities of P and S wave.
最后,把孔隙度低频分量和高频分量相加得到最终的孔隙度,研究孔隙度对纵、横波层速度和均方根速度的影响。
参考来源 - 关于孔隙度变化对海底未固结成岩的疏松地层速度的影响研究·2,447,543篇论文数据，部分数据来源于NoteExpress
在特征提取中还考虑了HRV中超低频分量和睡眠的关系。
The relationship between the sleep stage and the ultra-low frequency components of HRV is also considered.
随着尺度的增加，信号各个尺度上低频分量的能量逐渐降低。
由于生理信号的超低频分量相当丰富，利用电话网络无法直接传送。
Physiological signals can't be transmitted through telephone networks because they are full of ultra low frequency components.
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