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arXiv 1306.3416physics.soc-phcond-mat.stat-mechphysics.comp-ph
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一般网络的渗流

Percolation of a general network of networks

Jianxi Gao, Sergey V. Buldyrev, H. Eugene Stanley, Xiaoming Xu, Shlomo Havlin

摘要:

逾渗理论是研究系统脆弱性的一种方法。我们开发的分析框架和分析的相互依赖的网络(NetONet)组成的网络的渗流特性。通常,单个网络的渗流表明,由于故障而导致的网络中的损坏是故障节点分数的连续函数。与此形成鲜明对比的是,在NetONet中,由于级联故障,渗流过渡可能是不连续的,甚至单个节点故障可能导致系统的突然崩溃。我们展示了由$n$经典Erdens-Rényi(ER)网络组成的NetONet的一般框架,其中每个网络依赖于相同数量的$m$其他网络,即,相互依赖的ER网络的随机规则网络。与其中最大连接簇(互分量)的大小取决于$n$的\emph{treelike} NetONet相反,RR NetONet中的循环导致最大连接簇仅取决于$m$。分析了耦合的极端脆弱反馈条件。在ER网络的情况下,NetONet只表现出两个阶段,二阶相变和崩溃,并没有第一相变制度,不像没有反馈的条件。对于由RR网络组成的NetONet,当$q$较大时,存在一阶相变,当$q$较小时,存在二阶相变.我们的研究结果可以帮助设计强大的相互依赖的系统。

英文摘要:

Percolation theory is an approach to study vulnerability of a system. We develop analytical framework and analyze percolation properties of a network composed of interdependent networks (NetONet). Typically, percolation of a single network shows that the damage in the network due to a failure is a continuous function of the fraction of failed nodes. In sharp contrast, in NetONet, due to the cascading failures, the percolation transition may be discontinuous and even a single node failure may lead to abrupt collapse of the system. We demonstrate our general framework for a NetONet composed of $n$ classic Erdős-Rényi (ER) networks, where each network depends on the same number $m$ of other networks, i.e., a random regular network of interdependent ER networks. In contrast to a \emph{treelike} NetONet in which the size of the largest connected cluster (mutual component) depends on $n$, the loops in the RR NetONet cause the largest connected cluster to depend only on $m$. We also analyzed the extremely vulnerable feedback condition of coupling. In the case of ER networks, the NetONet only exhibits two phases, a second order phase transition and collapse, and there is no first phase transition regime unlike the no feedback condition. In the case of NetONet composed of RR networks, there exists a first order phase transition when $q$ is large and second order phase transition when $q$ is small. Our results can help in designing robust interdependent systems.

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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