Particle velocity controls phase transitions in contagion dynamics
Particle velocity controls phase transitions in contagion dynamics
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DOI：
10.1038/s41598-019-42871-x
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发表时间：
2019-04-23
影响因子：
4.6
通讯作者：
Eguiluz, Victor M.
中科院分区：
文献类型：
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作者：
Rodriguez, Jorge P.;Ghanbarnejad, Fakhteh;Eguiluz, Victor M.
相互作用通常需要粒子之间的接近。因此，粒子的运动驱动了位于它们附近的邻居的变化，导致了一系列的相互作用。在病原性传染中，感染通过近端相互作用发生，但同时，运动促进了不同菌株的共存。我们分析了粒子速度对单次感染和两次合作感染过程中相变的影响。首先，我们确定了一个最佳的速度（接近一半的相互作用范围归一化的恢复时间）与最大的流行病阈值，使速度降低到最佳值以下，导致更大的爆发。第二，在合作的情况下，系统显示连续的过渡为低速度，这成为不连续的速度的顺序的三倍的最佳速度。最后，我们描述了这些特征的制度，并解释了驱动动力学的机制。
Interactions often require the proximity between particles. The movement of particles, thus, drives the change of the neighbors which are located in their proximity, leading to a sequence of interactions. In pathogenic contagion, infections occur through proximal interactions, but at the same time, the movement facilitates the co-location of different strains. We analyze how the particle velocity impacts on the phase transitions on the contagion process of both a single infection and two cooperative infections. First, we identify an optimal velocity (close to half of the interaction range normalized by the recovery time) associated with the largest epidemic threshold, such that decreasing the velocity below the optimal value leads to larger outbreaks. Second, in the cooperative case, the system displays a continuous transition for low velocities, which becomes discontinuous for velocities of the order of three times the optimal velocity. Finally, we describe these characteristic regimes and explain the mechanisms driving the dynamics.