论文标题
正方形的感染传播和恢复
Infection spreading and recovery in a square lattice
论文作者
论文摘要
我们研究了在平方晶格中疾病的扩散和恢复,特别是强调了受感染斑块在网络中的初始分布的作用,由于易感和感染宿主的迁移而导致的恢复过程(如果有的话)在恢复过程中的发展以及恢复过程的启动。该疾病从晶格开始,具有三种可能的初始分布模式,无感染和无感染部位,感染核心斑块(ICP),感染的外围贴片(IPP)和随机分布的受感染斑块(RDIP)。我们的结果表明,感染在晶格中单调扩散,迁移增加而没有在ICP病例中显示出任何恢复迹象。在IPP情况下,它遵循类似的单调进展,而迁移的增加,自组织的愈合过程开始以较高的迁移,使晶格以关键的迁移速度完全恢复。令人鼓舞的是,对于最初的RDIP安排,恢复的机会更高,而关键迁移率较低。进行基于特征值的半分析研究是为了确定实现无感染晶格的关键迁移率。感染斑块的初始部分和感染力在自组织的恢复中起着重要作用。对于RDIP案件,他们遵循指数法,该法律控制着恢复过程。对于令人沮丧的ICP安排案例,我们提出了晶格中链接的随机重新布线,允许有效启动恢复过程的长距离迁移路径。全球感染的流行率随着重新迁移的范围的重新启动概率而逐渐下降,并逐渐改善,并导致无感染网络的诞生。
We investigate spreading and recovery of disease in a square lattice, and in particular, emphasize the role of the initial distribution of infected patches in the network, on the progression of an endemic and initiation of a recovery process, if any, due to migration of both the susceptible and infected hosts. The disease starts in the lattice with three possible initial distribution patterns of infected and infection-free sites, infected core patches (ICP), infected peripheral patches (IPP) and randomly distributed infected patches (RDIP). Our results show that infection spreads monotonically in the lattice with increasing migration without showing any sign of recovery in the ICP case. In the IPP case, it follows a similar monotonic progression with increasing migration, however, a self-organized healing process starts for higher migration, leading the lattice to full recovery at a critical rate of migration. Encouragingly, for the initial RDIP arrangement, chances of recovery are much higher with a lower rate of critical migration. An eigenvalue based semi-analytical study is made to determine the critical migration rate for realizing a stable infection-free lattice. The initial fraction of infected patches and the force of infection play significant roles in the self-organized recovery. They follow an exponential law, for the RDIP case, that governs the recovery process. For the frustrating case of ICP arrangement, we propose a random rewiring of links in the lattice allowing long-distance migratory paths that effectively initiate a recovery process. Global prevalence of infection thereby declines and progressively improves with the rewiring probability that follows a power law with the critical migration and leads to the birth of emergent infection-free networks.