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arXiv 0710.3907physics.soc-ph
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偏好和地理因素对传染病传播的影响

Impacts of preference and geography on epidemic spreading

Xin-Jian Xu, Xun Zhang, J. F. F. Mendes

摘要:

本文研究了随机网络上的标准易感-感染-易感模型,研究了偏好和地理因素对疾病传播的影响。网络通过在单位时间内在欧氏空间上引入一个具有$m$链路的随机节点来增长。新节点$i$在距离节点$i$的距离$d_{ij}$处链接到具有度$k_j$的节点$j$的概率与$k_{j}^{A}/d_{ij}^{B}$成比例,其中$A$和$B$是控制优先连接和节点-节点距离的成本的正常数。在A=0的情况下,我们恢复了通常的流行病行为,并设定了一个临界阈值,低于该阈值,疾病最终会灭绝。而当B=0时,只有在条件A=1时才不存在临界行为。虽然这两种成分是同时提出的,但对于较大的$A$和较小的$B$,网络对感染变得鲁棒。

英文摘要:

We investigate the standard susceptible-infected-susceptible model on a random network to study the effects of preference and geography on diseases spreading. The network grows by introducing one random node with $m$ links on a Euclidean space at unit time. The probability of a new node $i$ linking to a node $j$ with degree $k_j$ at distance $d_{ij}$ from node $i$ is proportional to $k_{j}^{A}/d_{ij}^{B}$, where $A$ and $B$ are positive constants governing preferential attachment and the cost of the node-node distance. In the case of A=0, we recover the usual epidemic behavior with a critical threshold below which diseases eventually die out. Whereas for B=0, the critical behavior is absent only in the condition A=1. While both ingredients are proposed simultaneously, the network becomes robust to infection for larger $A$ and smaller $B$.

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。

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