异质连通随机网络中SIR过程的大图极限
Large graph limit for an SIR process in random network with heterogeneous connectivity
摘要:
考虑了SIR传染病模型在一个结构模型网络上的传播,其中节点的度分布是给定的,且网络的边是随机匹配的。流行病的演变归结为三个测度值方程,描述了易感个体的程度和从感染或移除个体到易感个体集合的边数。这三个度分布足以描述疾病的过程。研究了大种群中的极限。作为推论,这为Volz [Mathematical Biology 56(2008)293- 310]得到的方程提供了严格的证明。
英文摘要:
We consider an SIR epidemic model propagating on a configuration model network, where the degree distribution of the vertices is given and where the edges are randomly matched. The evolution of the epidemic is summed up into three measure-valued equations that describe the degrees of the susceptible individuals and the number of edges from an infectious or removed individual to the set of susceptibles. These three degree distributions are sufficient to describe the course of the disease. The limit in large population is investigated. As a corollary, this provides a rigorous proof of the equations obtained by Volz [Mathematical Biology 56 (2008) 293--310].
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