电力系统在线监测中的检测信号含有大量的背景噪声，不便于检测。
Online monitoring of power system test signal contains a lot of background noise, not easy to detect.
该算法采用一种新的噪声检测方法将图像中的像素分为信号点和噪声点两类。
In the algorithm, a new noise detection scheme is adopted to separate the pixels in the image into signal pixels and noise pixels.
文中利用对称相关函数理论，分析了抵消平稳随机过程中与信号不相关的加性随机噪声的机理，并应用于线谱信号检测。
The theory of symmetrical function is used to suppress additive stationary random noise; assumption is that the signal and the noise are mutually uncorrelated.
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