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arXiv 1302.5607cs.SIcs.DCmath.PR
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动态图中的分布式社区发现

Distributed Community Detection in Dynamic Graphs

Andrea Clementi, Miriam di Ianni, Giorgio Gambosi, Emanuele Natale, Riccardo Silvestri

摘要:

受自组织社会机会网络研究的启发,本文研究了动态随机图中未知社区的分布式检测问题。作为一个正式的框架,我们考虑的动态版本的研究\emph{Planted Bisection Model} $\sdG(n,p,q)$的节点集$[n]$的网络被划分为两个未知的社区,在每个时间步,每个可能的边缘$(u,v)$是活跃的概率$p$,如果两个节点属于同一个社区,而它是活跃的概率$q$(与$q<<p$),否则。我们还考虑了这个模型的时间马尔可夫推广。我们提出了一个分布式协议的基础上流行的\emph{Label Propagation Algorithm}和证明,当比率$p/q$大于$n^{b}$(对于一个任意小的常数$b>0$),该协议发现正确的“种植”分区在$O(\log n)$时间,即使当动态图的快照是稀疏和断开(即在情况下$p=Θ(1/n)$)。

英文摘要:

Inspired by the increasing interest in self-organizing social opportunistic networks, we investigate the problem of distributed detection of unknown communities in dynamic random graphs. As a formal framework, we consider the dynamic version of the well-studied \emph{Planted Bisection Model} $\sdG(n,p,q)$ where the node set $[n]$ of the network is partitioned into two unknown communities and, at every time step, each possible edge $(u,v)$ is active with probability $p$ if both nodes belong to the same community, while it is active with probability $q$ (with $q<<p$) otherwise. We also consider a time-Markovian generalization of this model. We propose a distributed protocol based on the popular \emph{Label Propagation Algorithm} and prove that, when the ratio $p/q$ is larger than $n^{b}$ (for an arbitrarily small constant $b>0$), the protocol finds the right "planted" partition in $O(\log n)$ time even when the snapshots of the dynamic graph are sparse and disconnected (i.e. in the case $p=Θ(1/n)$).

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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