计算物理 ›› 1991, Vol. 8 ›› Issue (1): 23-29.

• 论文 • 上一篇    下一篇

解析延拓方法用于强烈振荡函数的数值积分

罗斌斌, 王中心, 陈学俊   

  1. 清华大学, 现代应用物理系, 北京 100084
  • 收稿日期:1990-03-15 出版日期:1991-03-25 发布日期:1991-03-25

ANALYTICAL CONTINUATION METHOD FOR EVALUATING HIGHLY OSCILLATORY INTEGRALS

Lo Bingbing, Wang Zhongxin, Chen Xuejun   

  1. Department of Physics, Tsinghua University, Beijing 100084
  • Received:1990-03-15 Online:1991-03-25 Published:1991-03-25

摘要: 本文简要叙述了解析延拓方法用于强烈振荡函数数值积分的有关问题。在此基础上,实际地编制了在粒子物理、核物理、原子物理和其它领域中经常出现的一类积分的数值计算程序。实际检验表明,此种方法比普通方法简便有效,不但计算速度快,而且精确度高。

关键词: 解析延拓, 强烈振荡函数, 数值积分

Abstract: The analytical continuation method is used for evaluating efficiently and accuratyintegrals, such as∫0xr2χ1(kr1,(k'rL(pr)dr, where χ1(x) can be a spherical Bessel function jl(x), or a spherical Neumanm function nj(x). In particular, a practical program based on the method mintioned above has been made and its results show that the present method is very efficient and highly accurate.

Key words: analytical continuation method, highly oscillatory function, numerical integration