生态系统的无害时滞和全局吸引性(英文)

Harmless delays and global attractivity in ecological system 

本文研究具有有限个离散时滞的两种群捕食系统，我们的目的是证明对该系统一致持续生存时滞是无害的。

This paper studies a two-dimensional nonautonomous predator-prey systems with a finite number of discrete delays.Our purpose is to demonstrate that the time delays are harmless for uniform persistence of the solutions of the system.Furthermore,we establish conditions under which the system admits a positive periodic solution which attracts all solutions.