arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1603.04571math.STcs.SIphysics.soc-phstat.TH
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网络数据的边可交换模型

Edge exchangeable models for network data

Harry Crane, Walter Dempsey

摘要:

可数顶点标号图的可交换模型不能复制在许多网络数据集中观察到的稀疏性和幂律度分布的大样本行为。从数学上的不可能性中出现了一个问题,即如何以反映已知经验行为并尊重基本统计原理的方式对网络数据进行建模。我们通过观察边而不是顶点作为从交互数据构建的网络中的统计单元来解决这个问题,使得边标记网络的理论对于许多应用来说更加自然。在这方面,我们介绍了{ \em边交换的概念},它不像它的顶点可交换对应承认模型的网络稀疏和/或幂律结构。我们的特征边交换网络产生一类非参数模型,类似于图子模型的顶点可交换设置。在这个类中,我们确定了一个易于处理的家庭的分布有一个明确的解释和合适的理论性质,其意义的估计,预测和测试,我们证明。

英文摘要:

Exchangeable models for countable vertex-labeled graphs cannot replicate the large sample behaviors of sparsity and power law degree distribution observed in many network datasets. Out of this mathematical impossibility emerges the question of how network data can be modeled in a way that reflects known empirical behaviors and respects basic statistical principles. We address this question by observing that edges, not vertices, act as the statistical units in networks constructed from interaction data, making a theory of edge-labeled networks more natural for many applications. In this context we introduce the concept of {\em edge exchangeability}, which unlike its vertex exchangeable counterpart admits models for networks with sparse and/or power law structure. Our characterization of edge exchangeable networks gives rise to a class of nonparametric models, akin to graphon models in the vertex exchangeable setting. Within this class, we identify a tractable family of distributions with a clear interpretation and suitable theoretical properties, whose significance in estimation, prediction, and testing we demonstrate.

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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