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Identifying and Evaluating Anomalous Structural Change-based Nodes in Generalized Dynamic Social Networks

Published: 14 June 2021 Publication History

Abstract

Recently, dynamic social network research has attracted a great amount of attention, especially in the area of anomaly analysis that analyzes the anomalous change in the evolution of dynamic social networks. However, most of the current research focused on anomaly analysis of the macro representation of dynamic social networks and failed to analyze the nodes that have anomalous structural changes at a micro level. To identify and evaluate anomalous structural change-based nodes in generalized dynamic social networks that only have limited structural information, this research considers undirected and unweighted graphs and develops a multiple-neighbor superposition similarity method (), which mainly consists of a multiple-neighbor range algorithm () and a superposition similarity fluctuation algorithm (). introduces observation nodes, characterizes the structural similarities of nodes within multiple-neighbor ranges, and proposes a new multiple-neighbor similarity index on the basis of extensional similarity indices. Subsequently, maximally reflects the structural change of each node, using a new superposition similarity fluctuation index from the perspective of diverse multiple-neighbor similarities. As a result, based on and , not only identifies anomalous structural change-based nodes by detecting the anomalous structural changes of nodes but also evaluates their anomalous degrees by quantifying these changes. Results obtained by comparing with state-of-the-art methods via extensive experiments show that can accurately identify anomalous structural change-based nodes and evaluate their anomalous degrees well.

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    cover image ACM Transactions on the Web
    ACM Transactions on the Web  Volume 15, Issue 4
    November 2021
    152 pages
    ISSN:1559-1131
    EISSN:1559-114X
    DOI:10.1145/3465465
    Issue’s Table of Contents
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than the author(s) must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected].

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    Publication History

    Published: 14 June 2021
    Accepted: 01 March 2021
    Revised: 01 September 2020
    Received: 01 April 2019
    Published in TWEB Volume 15, Issue 4

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    Author Tags

    1. Anomalous structural change-based node
    2. generalized dynamic social network
    3. structural similarity

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    • Research-article
    • Refereed

    Funding Sources

    • National Natural Science Foundation of China
    • Nature Science Foundation of Hubei Province
    • Independent Science and technology Innovation Fund project of Huazhong Agricultural University

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