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Travel time Lamb wave tomography has been shown to be an effective nondestructive evaluation (NDE) technique for plate-like structures.The methods used previously to extract arrival times of the fastest or multi Lamb wave modes are mostly based on various time-frequency methods such as Wigner-Ville distribution,short-time Fourier transform,and recently explored wavelet transform(WT).Frankly speaking,uses of these signal processing methods improve the accuracy of the arrival time extraction to a great extent...  相似文献
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