To solve the problem of ellipse - object - shape parameters detection in noise image, a new detection algorithm using nonlinear data fitting model and cross-reference iterative method is proposed.
The tubular cross flow fan is the main component of rotation noise and worm flow noise.
矿用贯流风机噪声的主要成分是旋转噪声和涡流噪声。
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The results demonstrate the cross correlation filter not only can suppress random noise in GPR signal but also confirm exactly the onset of reflection wave.