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A local structure model for network analysis

机译:网络分析局部结构模型

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摘要

The statistical analysis of networks is a popular research topic with ever widening applications. Exponential random graph models (ERGMs), which specify a model through interpretable, global network features, are common for this purpose. In this paper we introduce a new class of models for network analysis, called local structure graph models (LSGMs). In contrast to an ERGM, a LSGM specifies a network model through local features and allows for an interpretable and controllable local dependence structure. In particular, LSGMs are formulated by a set of full conditional distributions for each network edge, e.g., the probability of edge presence/absence, depending on neighborhoods of other edges. Additional model features are introduced to aid in specification and to help alleviate a common issue (occurring also with ERGMs) of model degeneracy. The proposed models are demonstrated on a network of tornadoes in Arkansas where a LSGM is shown to perform significantly better than a model without local dependence.
机译:网络的统计分析是一个流行的研究主题,应用程序遍布。指数随机图模型(ERGMS)通过可解释的全局网络功能指定模型,对于此目的是常见的。在本文中,我们介绍了一个新的网络分析模型,称为本地结构图模型(LSGMS)。与ERGM相比,LSGM通过本地特征指定网络模型,并允许解释和可控的本地依赖结构。特别地,LSGMS由每个网络边缘的一组完整条件分布制定,例如,边缘存在/不存在的概率,具体取决于其他边缘的邻域。引入额外的模型功能以帮助规范,并帮助缓解模型退化的常见问题(也与ERGMS发生)。拟议的模型在阿肯色州的龙卷风网络上证明,其中LSGM被示出比没有本地依赖性的模型更好地执行。

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