计算物理 ›› 1997, Vol. 14 ›› Issue (S1): 699-701.

• 论文 • 上一篇    下一篇

一类常微分方程边值问题二点格式的算法研究

谭志海, 吴雄华   

  1. 同济大学应用数学系, 上海 200092
  • 收稿日期:1997-01-30 修回日期:1997-06-30 出版日期:1997-12-25 发布日期:1997-12-25

COMPUTATIONAL METHOD OF THE TWO POINT SCHEME FOR A KIND OF ORDINARY DIFFERENTIAL EQUATIONS WITH BOUNDARY VALUE CONDITIONS

Tan Zhihai, Wu Xionghua   

  1. Department of Applied Mathematics, Tongji University, Shanghai, 200092
  • Received:1997-01-30 Revised:1997-06-30 Online:1997-12-25 Published:1997-12-25

摘要: 根据文[1]的思想对一类奇异摄动问题给出了高精度的任意不等距二点差分格式。在边界条件处理上对文[1]的算法作了改进,使算法不等距,在奇异点附近网格可任意加密并重点研究了离散方程组的计算方法。数值试验表明,本算法在处理奇异摄动问题时更灵活,更有效。

关键词: 奇异摄动问题, 二点格式, 高精度

Abstract: A two point scheme with high order accuracy on arbitrary mesh is presented for a kind of singular perturbation problems based on the idea of[1].Some improvements about boundary treatment and keeping stability are also given.Numerical examples found the method more convenient and efficient for singular perturbation problems.

Key words: singular perturbation problems, two-point scheme, high-order accuracy

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