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 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 . 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。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。