低压配电网电力线噪声可以分为背景噪声、与工频同步的周期性噪声、突发性噪声、窄频带噪声等。

The noises on low- voltage power networks are classified four types including background noise, periodic noise, burst noise and narrow band noise.

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提出了利用混沌算法抑制噪声，采用新型窄频带超声检漏原理来进行泄漏检测的新方法。

Chaos arithmetic is used for reducing noise in leaking system, and a new kind of narrow band ultrasonic testing principle is introduced.

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测量结果证明窄频带晶体三极管噪声的振幅分布，和遵守正态律的振幅分布相符合。

It is found that the amplitude distribution of nai-row band semiconductor noise agrees with that of the normal law distribution.

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