期刊
NUMERISCHE MATHEMATIK
卷 150, 期 1, 页码 33-77出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00211-021-01242-3
关键词
41A15; 41A63; 65D07; 65D15; 65T40
资金
- EPFL Lausanne
This paper discusses the kernel-based interpolation method for approximating multivariate periodic functions, particularly in the context of uncertainty quantification for elliptic partial differential equations with a diffusion coefficient given by a periodic random field. The paper includes a complete error analysis, lattice construction details, and numerical experiments supporting the proposed theory, ensuring a convergence rate and error bound independent of dimension.
This paper deals with the kernel-based approximation of a multivariate periodic function by interpolation at the points of an integration lattice-a setting that, as pointed out by Zeng et al. (Monte Carlo and Quasi-Monte Carlo Methods 2004, Springer, New York, 2006) and Zeng et al. (Constr. Approx. 30: 529-555, 2009), allows fast evaluation by fast Fourier transform, so avoiding the need for a linear solver. The main contribution of the paper is the application to the approximation problem for uncertainty quantification of elliptic partial differential equations, with the diffusion coefficient given by a random field that is periodic in the stochastic variables, in the model proposed recently by Kaarnioja et al. (SIAM J Numer Anal 58(2): 1068-1091, 2020). The paper gives a full error analysis, and full details of the construction of lattices needed to ensure a good (but inevitably not optimal) rate of convergence and an error bound independent of dimension. Numerical experiments support the theory.
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