实验结果表明：正常肺音音源为白噪声，异常肺音音源为周期脉冲序列，肺胸系统相当于声低通滤波器。
The results of experiment show that dreath sound sources are random white noise, Abnormal breath sounds sources are sequence of periodic impulses.
利用脉冲重复周期将交叠在一起的雷达脉冲序列分选开来是电子对抗领域的一个重要问题。
It is a important problem to deinterleave the radar signals with pulse repeat interval in electronic countermeasures.
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