The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis
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Cites methods from "The empirical mode decomposition an..."
...The test results in [24] and [25] do not report a quantitative amount of accuracy of their own methods, on the other hand, the accuracy reported in [26] for one-broken-bar detection is 90%....
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...To carry out EMD analysis described in [24], the extrema of the signal X (t) must be identified, the local maxima is then interpolated by a cubic spline as the upper envelope....
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...EMD is a data analysis technique proposed in [24], where a complex signal, stationary or nonstationary, is decomposed in a finite series of simpler data sets called IMFs....
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References
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...(ii) Lorenz equation The famous Lorenz equation (Lorenz 1963) was proposed initially to study deterministic non-periodic flow....
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...A brief tutorial on the Hilbert transform with the emphasis on its physical interpretation can be found in Bendat & Piersol (1986)....
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...In order to obtain meaningful instantaneous frequency, restrictive conditions have to be imposed on the data as discussed by Gabor (1946), Bedrosian (1963) and, more recently, Boashash (1992): for any function to have a meaningful instantaneous frequency, the real part of its Fourier transform has…...
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...In general, if more quantitative results are desired, the original skeleton presentation is better; if more qualitative results are desired, the smoothed presentation is better....
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...Therefore, the parameter, ν, defined as N21 −N20 = 1 π2 m4m0 −m22 m2m0 = 1 π2 ν2, (3.7) offers a standard bandwidth measure (see, for example, Rice 1944a, b, 1945a, b; Longuet-Higgins 1957)....
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