摘要
研究了一类血红细胞生存模型的时滞微分方程y(t)=-a(t)y(t)+6(t)e^-r(t)y(r-τ(t)),t≥0的正周期解的存在性,给出其存在的充分条件。
Sufficient conditions were obtained for the existence of positive periodic solutions of the periodic delayed equation:y(t)=-a(t)y(t)+6(t)e^-r(t)y(r-τ(t)),t≥0, which arised in a survival model of red blood cells.
出处
《海军航空工程学院学报》
2008年第1期112-114,共3页
Journal of Naval Aeronautical and Astronautical University
关键词
周期解
存在性
迭合度
periodic solution
existence
coincidence degree