摘要
讨论了一类具有时滞和Michaelismenten型功能反应函数的三种群捕食-食饵扩散模型,且所有参数均依赖于时间.应用重合度连续性定理,得到了该系统正周期解存在性的充分条件.
A three-species predator-prey diffusive model with time delay and Michaelis-menten type functional response is studied, where all parameters are time dependent. By using the continuation theorem of coincidence degree theory, the existence of a positive periodic solution for this system is established.
出处
《生物数学学报》
CSCD
2002年第4期385-394,共10页
Journal of Biomathematics
基金
Supported by the National Nature Science Foundation of China(19531070)
Youth Project Foundation of Hubei Province Education Department(2002B00002)
