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- W568081644 abstract "Artificial Neural Networks have been used to process ultrasonic signals for many non-destructive scenarios. However, this scenarios usually involve very shallow surfaces. When testing shafts, the signals are long and the new problem of mode-converted reflections emerges. They are echoes that do not correspond to cracks in the material, neither to characteristics of the shaft. Also, the length of the signals demands the application of feature extraction mechanism to reduce the dimension of the pattern vectors and make classifier training feasible. The results here establish experimentally that DWT provides faster and more reliable feature extraction for ANN in these long signals in shafts. This results match the recent studies for shallow signals where comparisons between FFT and DWT indicate DWT as the preferred feature extraction policy." @default.
- W568081644 created "2016-06-24" @default.
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- W568081644 date "2003-01-01" @default.
- W568081644 modified "2023-09-25" @default.
- W568081644 title "Classification of Ultrasonic Shaft Inspection Data Using Discrete Wavelet Transform" @default.
- W568081644 hasPublicationYear "2003" @default.
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