arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1608.00728math.NAcs.NA
收藏

稀疏网格上的准插值

Quasi-interpolation on a sparse grid with Gaussian

Duzce University(杜兹杰大学);University of Leicester(莱斯特大学)

Fuat Usta, Jeremy Levesley

AI总结:

本文提出基于Q-MuSIK的高效稀疏插值方法,改进收敛性和运行时间,尤其在高维问题中表现更优,并基于该方法构建了高维积分公式。

摘要:

受最近提出的多级稀疏核基插值(MuSIK)算法启发,我们引入了新的准多级稀疏插值(Q-MuSIK)方法。Q-MuSIK方案在收敛性和运行时间上优于经典准插值;即,Q-MuSIK算法在特别是在高维插值问题中,运行时间通常优于MuSIK方法,因为不需要求解大规模代数系统。我们随后提出了一种基于Q-MuSIK插值的快速、低复杂度、高维求积公式。我们展示了在高维插值和求积中的数值实验结果。

英文摘要:

Motivated by the recent multilevel sparse kernel-based interpolation (MuSIK) algorithm proposed in [Georgoulis, Levesley and Subhan, SIAM J. Sci. Comput., 35(2), pp. A815-A831, 2013], we introduce the new quasi-multilevel sparse interpolation with kernels (Q-MuSIK) via the combination technique. The Q-MuSIK scheme achieves better convergence and run time in comparison with classical quasi-interpolation; namely, the Q-MuSIK algorithm is generally superior to the MuSIK methods in terms of run time in particular in high-dimensional interpolation problems, since there is no need to solve large algebraic systems. We subsequently propose a fast, low complexity, high-dimensional quadrature formula based on Q-MuSIK interpolation of the integrand. We present the results of numerical experimentation for both interpolation and quadrature in high dimension.

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。

↑