Numerical quadrature for singular integrals on fractals
Numerical quadrature for singular integrals on fractals
复制标题
分形奇异积分的数值求积
DOI:
10.1007/s11075-022-01378-9
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发表时间:
2022
影响因子:
2.1
通讯作者:
Gibbs A
中科院分区:
文献类型:
--
作者:
Gibbs A
We present and analyse numerical quadrature rules for evaluating regular and singular integrals on self-similar fractal sets. The integration domainis assumed to be the compact attractor of an iterated function system of contracting similarities satisfying the open set condition. Integration is with respect to any “invariant” (also known as “balanced” or “self-similar”) measure supported on, including in particular the Hausdorff measurerestricted to, wheredis the Hausdorff dimension of. Both single and double integrals are considered. Our focus is on composite quadrature rules in which integrals overare decomposed into sums of integrals over suitable partitions ofinto self-similar subsets. For certain singular integrands of logarithmic or algebraic type, we show how in the context of such a partitioning the invariance property of the measure can be exploited to express the singular integral exactly in terms of regular integrals. For the evaluation of these regular integrals, we adopt a composite barycentre rule, which for sufficiently regular integrands exhibits second-order convergence with respect to the maximum diameter of the subsets. As an application we show how this approach, combined with a singularity-subtraction technique, can be used to accurately evaluate the singular double integrals that arise in Hausdorff-measure Galerkin boundary element methods for acoustic wave scattering by fractal screens.
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影响因子:
0.8
作者:
Chandler-Wilde S
通讯作者:
Chandler-Wilde S
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
S. Amari;J. Bornemann
通讯作者:
J. Bornemann
DOI:
--
发表时间:
1968
期刊:
影响因子:
--
作者:
D. Schlitt
通讯作者:
D. Schlitt
影响因子:
2.1
作者:
Chandler-Wilde S
通讯作者:
Chandler-Wilde S
DOI:
--
发表时间:
2011
期刊:
Wireless Engineering and Technology
影响因子:
--
作者:
G. Srivatsun;Subha Rani Sundaresan;Gangadaran Saisundara Krishnan
通讯作者:
Gangadaran Saisundara Krishnan