摘要
对一类按时滞转化的具有两个阶段结构的SIS传染病模型进行了分析,得到了传染病最终消除和成为地方病的阈值.即当传染率小于该阀值时,传染病最终消除;反之,此种传染病将成为地方病.
A SIS epidemic model witb two-stage structure (consistering immature and mature stage) and time delay is studied. The threshold is found, that is, when the infection rate is less than this threshold, the epidemic will die out; otherwise the epidemic will become local epidemic.
出处
《数学的实践与认识》
CSCD
北大核心
2005年第7期159-166,共8页
Mathematics in Practice and Theory
基金
国家自然科学基金(10471117)
河南省自然科学基金(0511012800)资助项目