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arXiv 2008.04790math.STcs.LGmath.PRstat.TH
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非二元时间随机块模型中的群落恢复

Community recovery in non-binary and temporal stochastic block models

Inria(法国国家信息与自动化研究所);Aalto University(阿尔托大学)

Konstantin Avrachenkov, Maximilien Dreveton, Lasse Leskelä

摘要:

本文研究了$N$节点网络中的成对交互对潜在社区成员的估计,其中观察到的交互可以是任意类型的,包括二进制,分类和向量值,并且不排除更一般的对象,如时间序列或空间点模式。作为一个生成模型,这样的数据,我们引入了一个随机块模型与一般的可测量的相互作用空间$\mathcal S$,我们推导出的最小可实现的差错率的信息理论界。这些界限产生尖锐的标准存在一致的和强一致的估计数据稀疏性,块内和块间的相互作用分布之间的统计相似性,以及相互作用空间的形状和大小。一般的框架,使人们有可能研究时间和多路复用网络与$\mathcal S = \{0,1\}^T$,在设置中,$N \to \infty$和$T \to \infty$,和时间的相互作用模式随着时间的推移相关。对于时间马尔可夫相互作用,我们得到尖锐的一致性阈值。我们还提出了快速在线估计算法,充分利用了非二进制性质的观测数据。对合成数据和真实数据的数值实验表明,即使对于非常稀疏的数据阵列,这些算法也能快速产生准确的估计。

英文摘要:

This article studies the estimation of latent community memberships from pairwise interactions in a network of $N$ nodes, where the observed interactions can be of arbitrary type, including binary, categorical, and vector-valued, and not excluding even more general objects such as time series or spatial point patterns. As a generative model for such data, we introduce a stochastic block model with a general measurable interaction space $\mathcal S$, for which we derive information-theoretic bounds for the minimum achievable error rate. These bounds yield sharp criteria for the existence of consistent and strongly consistent estimators in terms of data sparsity, statistical similarity between intra- and inter-block interaction distributions, and the shape and size of the interaction space. The general framework makes it possible to study temporal and multiplex networks with $\mathcal S = \{0,1\}^T$, in settings where both $N \to \infty$ and $T \to \infty$, and the temporal interaction patterns are correlated over time. For temporal Markov interactions, we derive sharp consistency thresholds. We also present fast online estimation algorithms which fully utilise the non-binary nature of the observed data. Numerical experiments on synthetic and real data show that these algorithms rapidly produce accurate estimates even for very sparse data arrays.

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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