The existence of the noise interferes detection for useful signal, and affects system operating range.

噪声的存在干扰了有用信号的探测，减少了系统的作用距离。

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A large log file is difficult to use because you need to filter out a lot of noise to find the useful signal.

较大的日志文件很难使用，这是因为它们需要过滤大量的噪声才能找到有用的信号。

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A matrix of anti-interference is used, which can distinguish useful signal from interference signal quickly and validly.

该算法中采用了抗干扰矩阵，可快速有效地区分有用信号及干扰信号。

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In trying to divine the direction of the U.S. economy we have a similarly useful signal, though one disregarded by most in the economic commentariat.

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Once again, the way the particles knock electrons off the stuff they are travelling through (this time the gas) provides a useful signal (detected by the wires).

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Prices for these later years (when demand is expected to catch up with supply) would have been close to the tariffs needed to make new plants profitable, sending a useful signal to investors.

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