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arXiv 1902.10366cs.SIphysics.soc-ph
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利用模体对扩散网络的时间动力学建模

Leveraging Motifs to Model the Temporal Dynamics of Diffusion Networks

Soumajyoti Sarkar, Hamidreza Alvari, Paulo Shakarian

摘要:

基于社会影响力模型的信息扩散机制主要研究了当活跃邻居向用户暴露消息时采用的可能性。这个问题主要源于这样一个事实,即在大多数情况下,在易感节点被感染之前,社交网络中的一组活跃邻居中谁暴露了谁的明确信息是不可用的。在本文中,我们试图通过研究级联的时间网络结构来理解通过信息级联的扩散过程。在这样做的过程中,我们通过网络修剪技术,利用网络图案,以确定潜在的感染者负责从这些活跃的邻居之间的暴露,适应从一个节点的活跃邻居的曝光的影响。我们试图评估级联动力学建模中使用的组件的有效性,特别是暴露信息的附加效果是否有用。根据这个模型,我们开发了一种推理算法,即InferCut,它使用从模型和暴露信息中学习到的参数来预测给定级联中每个潜在易感用户的实际父结点。通过对真实世界微博社交网络数据集的实证分析,证明了在扩散过程的早期阶段,引入暴露信息对恢复暴露用户的确切父母的重要性。

英文摘要:

Information diffusion mechanisms based on social influence models are mainly studied using likelihood of adoption when active neighbors expose a user to a message. The problem arises primarily from the fact that for the most part, this explicit information of who-exposed-whom among a group of active neighbors in a social network, before a susceptible node is infected is not available. In this paper, we attempt to understand the diffusion process through information cascades by studying the temporal network structure of the cascades. In doing so, we accommodate the effect of exposures from active neighbors of a node through a network pruning technique that leverages network motifs to identify potential infectors responsible for exposures from among those active neighbors. We attempt to evaluate the effectiveness of the components used in modeling cascade dynamics and especially whether the additional effect of the exposure information is useful. Following this model, we develop an inference algorithm namely InferCut, that uses parameters learned from the model and the exposure information to predict the actual parent node of each potentially susceptible user in a given cascade. Empirical evaluation on a real world dataset from Weibo social network demonstrate the significance of incorporating exposure information in recovering the exact parents of the exposed users at the early stages of the diffusion process.

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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