The detection performance relies finally on Signal Noise Ratio (SNR) in the traditional energy based detection technology.

传统的能量检测在接收信号为高斯分布下最优，其检测性能最终取决于信噪比。

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Worth noting, however, is that many IPS sensors use signature-based detection, meaning that attacks are added to a database as they are discovered.

但是，值得牢记的是，许多IPS嗅探器使用基于特征码的检测方法，这意味着当攻击被发现的时候才能被加入到数据库中。

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The intrusion detection system divides into two categories according to the detection technique: anomaly-based detection system and misuse-based detection system.

入侵检测按照检测技术分为两类：基于异常的入侵检测和基于误用的入侵检测。

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These techniques help criminals evade signature-based detection and stay on the network.

FORBES: Is anyone safe? Spate of incidents raises security concerns

It could also be used with a camera-based position detection system as shown above, meaning your finger's location and force could be calculated on a non-active surface like an ordinary table.

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Carl Clump, the boss of Retail Decisions, a fraud-detection firm based near London with clients including Wal-Mart, Sears and Bloomingdale's, offers an example.

ECONOMIST: Computing