具有时滞和Beddington-DeAngelis功能性反应的N种群食物链系统的周期解

摘要

利用重合度理论研究了具有时滞和Beddington-DeAngelis功能性反应的n种群食物链系统的周期解存在性,运用不等式技巧得到了该生物系统正周期解存在的一个充分条件.%Nonlinear periodic N-species food-chain system with Beddington-DeAngelis functional response and time delays is investigated. By using the continuation theorem of coincidence degree theory and inequality skills, an easily verifiable sufficient condition is derived for the existence of positive periodic solutions of the system.