摘要
讨论了与年龄相关具有空间结构的非线性传染病模型，并且给出了其周期解存在的充分必要条件．
The nonlinear epidemic model of population with age-dependence and spatial structure is discussed,and the sufficient conditions for existence of periodic solutions are presented.
出处
《吉林化工学院学报》
CAS
1997年第2期72-75,共4页
Journal of Jilin Institute of Chemical Technology
