J4 ›› 2012, Vol. 50 ›› Issue (05): 961-964.

• 数学 • 上一篇    下一篇

一类具功能反应捕食系统的定性分析

房玉志, 魏凤英   

  1. 福州大学 数学与计算机科学学院, 福州 350108
  • 收稿日期:2011-10-26 出版日期:2012-09-26 发布日期:2012-09-29
  • 通讯作者: 魏凤英 E-mail:weifengying76@yahoo.com.cn

Qualitative Analysis of a Kind of PredatorPreySystems with Functional Response

FANG Yuzhi, WEI Fengying   

  1. College of Mathematics and Computer Science, Fuzhou University, Fuzhou 350108, China
  • Received:2011-10-26 Online:2012-09-26 Published:2012-09-29
  • Contact: WEI Fengying E-mail:weifengying76@yahoo.com.cn

摘要:

利用Poincare-Bendixson环域定理等方法, 研究一类具有功能性反应捕食系统x·=xg(x)-yφ(x), y·=y(-d+eφ(x))极限环的存在性. 在g(x)=a-bxm, φ(x)=cxθ, m=θ=k/n, n>2, 1≤k

关键词: 捕食系统, 平衡点, 极限环, 稳定性

Abstract:

With the help of PoincareBendixson theorem, the existence for the limit cycles about a kind of predatorprey systems with functional response x·=xg(x)-yφ(x), y·=y(-d+eφ(x)) was discussed, obtaining the sufficient conditions for nonexistence, existence and uniqueness of the limit cycles around an equilibrium point in the case of g(x)=a-bxm, φ(x)=cxθ, m=θ=k/n, n>2, 1≤k+.

Key words:  predatorprey system, equilibrium point, limit cycle, stability

中图分类号: 

  • O175.14