研究一类具有标准发生率的SIS传染病模型。
An SIS epidemic model with standard incidence rate is investigated.
疾病的发生率分别是标准发生率和双线性发生率。
The incidence of infectious diseases are bilinear incidence and standard incidence in these models.
研究如下一类具有标准发生率的SI型传染病模型。
An SI epidemic model with standard incidence rate as follow is investigated.
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