An SIS epidemic model with standard incidence rate is investigated.
研究一类具有标准发生率的SIS传染病模型。
An SI epidemic model with standard incidence rate as follow is investigated.
研究如下一类具有标准发生率的SI型传染病模型。
In this paper we formulate an epidemic model with chronological age and infectious age structure.
本文根据流行病的传染过程和机理建立了具有年龄和病程结构的流行病模型。
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