Band-pass filter often used in anti-jamming devices, in order to receive a valid signal within the band, while the elimination of high frequency and low frequency interference and noise.

带通滤波器经常用于抗干扰设备中，以便接收某一频带范围内的有效信号，而消除高频段和低频段的干扰和噪声。

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The paper describes the circuit principle and the construction of a overload detector which has functions of discriminating overload signal and detecting valid signal for a random acoustic pulse.

本文阐述一种随机信号过载检测器的原理和电路结构，它兼有既能识别过载又能实现信号灵敏可靠检测的功能。

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Being able to mine massive amounts of historical data from the social web to extract metrics relating to activity, sentiment and anomaly identification provides financial firms with ample opportunity to isolate valid trading signal within processed social data.

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