论文标题
并发对马尔可夫颞网络流行病的影响
Effects of concurrency on epidemic spreading in Markovian temporal networks
论文作者
论文摘要
边缘的并发性,通过在给定时间点共享一个共同节点的边数量化,可能是时间网络中流行过程的重要决定因素。我们提出了理论上可以处理的马尔可夫时间网络模型,其中每个边缘在连续的时间内都在活动状态和非活动状态之间翻转。不同的模型具有不同量的并发性,同时我们可以调整模型以共享相同的边缘激活和停用的统计数据(因此,每个边缘处于活动状态的时间比例)以及聚集(即静态)网络的结构。我们通过分析计算每个模型共享节点的边缘的并发量。然后,我们在数值上研究并发对随机易感性易感性和易感性触发的动态动态的影响。我们发现并发增强了流行阈值附近的流行病扩散,而在许多情况下,这种效果很小。此外,当感染率大大大于流行阈值时,并发抑制大多数情况下的流行病扩散。总而言之,我们的数值模拟表明,并发对在模型中增强流行病扩散的影响始终存在于流行病阈值附近,但适度。预计所提出的时间网络模型将有助于调查并发对各种集体动力学对网络的影响,包括传染和其他动态。
The concurrency of edges, quantified by the number of edges that share a common node at a given time point, may be an important determinant of epidemic processes in temporal networks. We propose theoretically tractable Markovian temporal network models in which each edge flips between the active and inactive states in continuous time. The different models have different amounts of concurrency while we can tune the models to share the same statistics of edge activation and deactivation (and hence the fraction of time for which each edge is active) and the structure of the aggregate (i.e., static) network. We analytically calculate the amount of concurrency of edges sharing a node for each model. We then numerically study effects of concurrency on epidemic spreading in the stochastic susceptible-infectious-susceptible and susceptible-infectious-recovered dynamics on the proposed temporal network models. We find that the concurrency enhances epidemic spreading near the epidemic threshold while this effect is small in many cases. Furthermore, when the infection rate is substantially larger than the epidemic threshold, the concurrency suppresses epidemic spreading in a majority of cases. In sum, our numerical simulations suggest that the impact of concurrency on enhancing epidemic spreading within our model is consistently present near the epidemic threshold but modest. The proposed temporal network models are expected to be useful for investigating effects of concurrency on various collective dynamics on networks including both infectious and other dynamics.