Toeplitz-type approximations to the Hadamard integral operator and their applications to electromagnetic cavity problems

Toeplitz-type approximations to the Hadamard integral operator and their applications to electromagnetic cavity problems
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Hadamard 积分算子的 Toeplitz 型近似及其在电磁腔问题中的应用

DOI:
10.1016/j.apnum.2006.11.003
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发表时间:
2008-02
影响因子:
2.8
通讯作者:
Wu, Jiming
Wu, Jiming
中科院分区:
数学2区
文献类型:
--
作者:
Wang, Yingxi;Li, Wen;Sun, Weiwei;Wu, Jiming

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本文给出了Hadamard有限部分积分算子的五个Toeplitz型格式。这些离散格式具有Toeplitz或近似Toeplitz结构,这在发展积分微分方程数值解的快速线性求解器方面具有许多优点。两个例子来证实我们的理论分析的逼近Hadamard有限部分积分,并显示解决积分方程的超奇异核的计划的准确性。最后,我们将我们的算法应用于腔体的电磁散射。数值结果表明这些算法是有效的。
In this paper, we present five Toeplitz-type schemes for the Hadamard finite-part integral operator. These discrete schemes are of Toeplitz or nearly Toeplitz structure, which gives many advantages in developing fast linear solvers for numerical solution of intego-differential equations. Two examples are presented to confirm our theoretical analysis of approximations to the Hadamard finite-part integrals and to show the accuracy of schemes for solving integral equations with a hypersingular kernel. Finally, we apply our algorithms for electromagnetic scattering from cavities. Numerical results show that these algorithms are efficient.
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