The research on failure diagnosis of rolling bearings, which are the most ordinary parts in mechanical equipments, is very significant. When locally scathed, the bearings would bump the other parts periodically with the result that the seasonal impulses come into being. With band enough broad to overcast each connatural vibrations and thereby the stationary vibrations turn into transients.
Although well localized in frequency, the Fourier transform was localized none too well in time whi...
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