Evolutionary Spectra Estimation Using Wavelets

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A stochastic approach for generating spectrum compatible fully nonstationary earthquakes (2010, background): “14 where 2 ˆ ( , ) ( , ) g g R R u u G t G t       is the scaled joint time-frequency distribution of the recorded accelerogram [29, 31-33], while ( , ) g S u G t   is the separable power spectral density of the corrective term given by the equation”
Harmonic wavelets based statistical linearization for response evolutionary power spectrum determination (2012, methodology): “In a recent paper by Huang and Chen [39] the approach initially proposed by Spanos and Failla [37] was extended to obtain EPS estimations of multivariate processes.”