arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.09476math.NAcs.NA
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具有接近不连续性的精度的单元平均WENO及其在信号处理中的应用

Cell-average WENO with progressive order of accuracy close to discontinuities with applications to signal processing

Sergio Amat, Juan Ruiz, Chi-Wang Shu, Dionisio F. Yañez

摘要:

本文将S。Amat,J. Ruiz,C. W. Shu,D. F. Yáñez,一种新的WENO-2 r算法,具有接近不连续性的渐进精度顺序,提交给SIAM J. Numer。肛门..这种新的策略试图改善WENO-($2r-1$)算法的结果接近奇点,导致在这些区域的精度的最佳顺序。其主要思想是修改的最佳权重,使他们有一个非线性的表达,取决于位置的不连续性。在本文中,我们研究的应用新算法的信号处理使用Harten的多分辨率。几个数值实验进行,以确认所获得的理论结果。

英文摘要:

In this paper we translate to the cell-average setting the algorithm for the point-value discretization presented in S. Amat, J. Ruiz, C.-W. Shu, D. F. Yáñez, A new WENO-2r algorithm with progressive order of accuracy close to discontinuities, submitted to SIAM J. Numer. Anal.. This new strategy tries to improve the results of WENO-($2r-1$) algorithm close to the singularities, resulting in an optimal order of accuracy at these zones. The main idea is to modify the optimal weights so that they have a nonlinear expression that depends on the position of the discontinuities. In this paper we study the application of the new algorithm to signal processing using Harten's multiresolution. Several numerical experiments are performed in order to confirm the theoretical results obtained.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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