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Wavelet-based multiscale inversion of 2-dimension seismic waveform. (Chinese. English summary) Zbl 1138.86306

Summary: Multiscale inversion is a promising method because of its low dependence on the initial model, convergence efficiency and robustness. A wavelet multiscale inversion method using the orthogonal wavelet transform is applied to inverse two-dimensional seismic waveforms. The inversion result can be re-directed for the optimization of the wavelet significant coefficients (WSC) rather than the traditional seismic parameters in physical space. Also, the computational burden and local minimum are significantly less due to the sparseness and spatial relativity of the WSC. As an aid in the prediction of the significant coefficient, the idea of embedded zerotree wavelet is introduced for the first time. Sequentially, the optimized parameter can be predicted using the zerotree and the process of inversion becomes more efficient.

MSC:

86A15 Seismology (including tsunami modeling), earthquakes
42C40 Nontrigonometric harmonic analysis involving wavelets and other special systems
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