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Asymptotic expansion and quadrature rule for a class of singular-oscillatory-Bessel-type transforms
Journal of Computational and Applied Mathematics ( IF 2.4 ) Pub Date : 2020-08-12 , DOI: 10.1016/j.cam.2020.113141
Ruyun Chen , Di Yu , Juan Chen

In this paper we mainly focus on the asymptotic expansion and quadrature rule for a class of singular-oscillatory-Bessel-type transforms. The asymptotic expansion in inverse powers of the frequency ω is obtained after avoiding the singularities. Then, based on the asymptotic expansion, we successfully construct a so-called modified Filon-type quadrature rule. Meanwhile, we also give the corresponding error analysis on two rules in inverse powers of the large frequency ω. Some numerical examples based on theoretical results are presented to demonstrate the efficiency and accuracy of the proposed rules.



中文翻译:

一类奇振荡贝塞尔型变换的渐近展开和正交规则

在本文中,我们主要关注一类奇异振荡Bessel型变换的渐近展开和正交规则。频率反幂的渐近展开ω在避免奇异点之后获得。然后,基于渐近展开,我们成功构造了一个所谓的修正Filon型正交规则。同时,我们还针对大频率反幂的两个规则给出了相应的误差分析ω。给出了一些基于理论结果的数值例子,以证明所提出规则的有效性和准确性。

更新日期:2020-08-12
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