J4 ›› 2009, Vol. 47 ›› Issue (05): 941-944.

• 数学 • 上一篇    下一篇

一阶常微分方程组的奇异摄动问题

周冉1, 张艳妮2, 黄京男3   

  1. 1. 吉林大学 农学部公共教学中心 数学教研室, 长春 130062|2. 吉林大学 数学研究所, 长春 130012;3. 朝鲜金亨稷师范大学 数学系| 朝鲜 平壤 999093
  • 收稿日期:2009-01-04 出版日期:2009-09-26 发布日期:2009-11-03
  • 通讯作者: 周冉 E-mail:zhouranjlu@yahoo.cn.

Singular Perturbation Problems for First OrderOrdinary Differential Equations

ZHOU Ran1, ZHANG Yanni2, Hwang Gyongnam3   

  1. 1. Mathematics Section| Department of Agriculture| |Jilin University, Changchun 130062, China;2. Institute of Mathematics, Jilin University, Changchun 130012, China|3. Department of Mathematics, D. P. R. K Kim Hyong Jik University of Education, PyongYang 999093, D.P.R.K
  • Received:2009-01-04 Online:2009-09-26 Published:2009-11-03
  • Contact: ZHOU Ran E-mail:zhouranjlu@yahoo.cn.

摘要:

结合伸缩坐标法和多重尺度法, 对一类一阶常微分方程组的奇异摄动问题构造了一致有效的渐近展开式, 并以Duffing方程为例, 用本文的方法求得其一阶有效的渐近展开式. 结果表明, 所给方法与其他方法所得结果相符.

关键词: 奇异摄动, 伸缩坐标法, 多重尺度法, Duffing方程

Abstract:

Combining the stretched coordinate method with the multiple scales method, we constructed the uniformly valid expansion for the singular perturbation problems of first order ordinary differential equations. Furthermore, to show the validness of our result, we applied our method to the Duffing equation and obtained the uniformly valid asymptotic expansions.

Key words: singular perturbation, stretched coordinate method, multiple scales method, Duffing equation

中图分类号: 

  • O175