For the problems exiting in real seismic data processing, such as S/N ratio and resolution, this paper utilizes 2D wavelet transform and multi-resolution analysis to attenuate noise and enhance resolution. Many calcul...
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For the problems exiting in real seismic data processing, such as S/N ratio and resolution, this paper utilizes 2D wavelet transform and multi-resolution analysis to attenuate noise and enhance resolution. Many calculations preseuted in this paper have shown that the data quality after multi-resolution analysising is improved.
This paper seeks to identify the coefficient v in the steady-state diffusion equa-tion -div(v gradu) = f for two dimensional anisotropic medium in a boundeddomain Ω from two known solutions u1, u2 of the correspondin...
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This paper seeks to identify the coefficient v in the steady-state diffusion equa-tion -div(v gradu) = f for two dimensional anisotropic medium in a boundeddomain Ω from two known solutions u1, u2 of the corresponding Dirichlet prob-lems, where f is known, v takes diagonal matrix values, which are given at theboundary of Ω, and may have mild discontinuities. This problem is solved byminimization of an associated functional. We propose an alternating Neubergergradient algorithm, and show the results of numerical experiments.
In this paper, aiming to the problems, such as slow convergence, long computing time in the tidal current computation of present medium or large -scale distributed power system, one parallel algorithm based on MPI pro...
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In this paper, aiming to the problems, such as slow convergence, long computing time in the tidal current computation of present medium or large -scale distributed power system, one parallel algorithm based on MPI programming model and the character of distributed power system is given. Then the performance analysis is described. And the algorithm has been programmed in MPICH language. At last,the validity of the algorithm is verified by a middle-scale sample computation on8 CPUs in a small cluster with 128 CPUs.
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