2010 | OriginalPaper | Buchkapitel
Behavioral Analyses of Information Diffusion Models by Observed Data of Social Network
verfasst von : Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Erschienen in: Advances in Social Computing
Verlag: Springer Berlin Heidelberg
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We investigate how well different information diffusion models explain observation data by learning their parameters and performing behavioral analyses. We use two models (CTIC, CTLT) that incorporate continuous time delay and are extension of well known Independent Cascade (IC) and Linear Threshold (LT) models. We first focus on parameter learning of CTLT model that is not known so far, and apply it to two kinds of tasks: ranking influential nodes and behavioral analysis of topic propagation, and compare the results with CTIC model together with conventional heuristics that do not consider diffusion phenomena. We show that it is important to use models and the ranking accuracy is highly sensitive to the model used but the propagation speed of topics that are derived from the learned parameter values is rather insensitive to the model used.