arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1209.2541physics.soc-phcs.SInlin.AO
收藏

生长型自适应网络中流行病阈值的缺失

Absence of epidemic thresholds in a growing adaptive network

Güven Demirel, Thilo Gross

摘要:

社会联系网络的结构强烈影响流行病的动态。特别是,现实世界社交网络的无标度结构使得感染率低的不太可能的疾病得以传播并成为地方病。然而,特别是对于可能致命的疾病,疾病对社会结构的影响也不容忽视,导致复杂的相互作用。在这里,我们考虑的增长网络的优先附件,其中节点同时删除由于SIR流行病。我们发现,增加传染性增加了疾病的流行,同时导致从无标度到指数拓扑结构的转变。虽然发生了向有限方差的度分布的过渡,但网络在热力学极限下仍然没有表现出流行阈值。我们说明了这些结果使用基于代理的模拟和易于分析的近似方案。

英文摘要:

The structure of social contact networks strongly influences the dynamics of epidemic diseases. In particular the scale-free structure of real-world social networks allows unlikely diseases with low infection rates to spread and become endemic. However, in particular for potentially fatal diseases, also the impact of the disease on the social structure cannot be neglected, leading to a complex interplay. Here, we consider the growth of a network by preferential attachment from which nodes are simultaneously removed due to an SIR epidemic. We show that increased infectiousness increases the prevalence of the disease and simultaneously causes a transition from scale-free to exponential topology. Although a transition to a degree distribution with finite variance takes place, the network still exhibits no epidemic threshold in the thermodynamic limit. We illustrate these results using agent-based simulations and analytically tractable approximation schemes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑