... 周期性发生的短暂而有明显中断的脉冲声组，脉冲频率4～8Hz。 3．3 信号的特征 character（of a signal） 3．4 闪光 flash ...
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目的：提取心脏激励源信号的特征波形。
OBJECTIVE: To extract the heart excitation source signals in human pulse wave.
本文对加工中心钻削过程功率信号的特征进行了分析。
The characteristics of power signal during drilling on machining centers is analyzed in this article.
提出了实际可行的算法，提取了心脏激励源信号的特征波形。
The feasible arithmetic is given and the characteristic waveforms of heart excitation source is obtained.
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