Railway Axle Condition Monitoring Technique Based on Wavelet Packet Transform Features and Support Vector Machines.

Sensors (Basel) · 2020 · PMC7348915 · PMID 32599845

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a clear trendno p-value reported

A packet (which represents a frequency region) was selected as a feature when its WPT energy showed a clear trend with respect to the crack size, because the packet is considered to have relevant information about the crack condition.

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