通过时域分析指出驾驶疲劳的量化特征。
The characteristic of driver fatigue is pointed out quantificationally by time-field analysis.
针对远方列车信号很小，且具有很强的噪声，直接通过时域分析误差较大，因此，采取频域分析方法，获取列车接近时的警报信号的规律，以用于便携式列车接近安全报警系统中。
So by means of the frequency-domain analysis, the character of alarming signal can be deduced and used in the system of portable safety alarming system of train approaching.
通过时域波形和频谱等基本分析手段来探测振动加速度信号中的周期性冲击分量往往是困难的。
It is difficult to detect the periodic impulse component in the vibration acceleration signal with conventional analysis methods such as time domain wave and frequency spectrum.
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