一类具有时滞的脉冲周期捕捞系统正周期解的存在性（英文）

Existence of Positive Periodic Solutions of an Impulsive Periodic Fishing Model with Delay

研究一类带时滞的脉冲周期捕捞的正周期解的存在性,利用Gaines与Mawhin的迭合度理论中的连续定理,以及一些先验估计,得到了所研究的系统至少存在一个正周期解的充分条件.

In this paper,an impulsive periodic fishing model with time delay is investigated.Using Gaines and Mawhin's continuation theorem from coincidence degree theory as well as some prior estimates,we get sufficient conditions for the existence of at least one positive periodic solutions of the system.