arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.10646cs.SIphysics.soc-ph
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在线社交网络中攻击扩散模型及其最小化

On the Aggression Diffusion Modeling and Minimization in Online Social Networks

Marinos Poiitis, Athena Vakali, Nicolas Kourtellis

摘要:

在线社交网络中的攻击行为主要是从机器学习的角度来研究的,它在静态环境中检测这种行为。然而,攻击性在网络中扩散的方式很少受到关注,因为它嵌入了建模挑战。事实上,对攻击如何从一个用户传播到另一个用户进行建模是一个重要的研究课题,因为它可以实现有效的攻击监控,特别是在迄今为止应用简单的用户阻止技术的媒体平台中。在本文中,我们解决侵略传播建模和最小化的Twitter上,因为它是一个流行的微博平台,侵略有几个发作。我们提出了不同的方法,建立在两个著名的扩散模型,独立级联(IC)和线性阈值(LT),研究社会网络中的侵略演化。我们的实验研究如何以及每个方法可以使用真实的Twitter数据模型的侵略传播,而不同的参数,如种子用户的选择,图形边缘加权,用户的激活时间等,它被发现,表现最好的策略是选择种子用户与度为基础的方法,加权用户边缘的基础上,他们的社交圈的重叠,并根据他们的侵略程度激活用户。我们进一步采用性能最好的模型来预测哪些普通真实用户在未来可能变得具有攻击性(反之亦然),并在此预测任务中达到AUC=0.89。最后,我们调查侵略最小化通过推出竞争级联“通知”和“治愈”侵略者。我们表明,IC和LT模型可以用于侵略最小化,提供侵入性较低的替代方案,目前流行的在线社交网络平台采用的封锁技术。

英文摘要:

Aggression in online social networks has been studied mostly from the perspective of machine learning which detects such behavior in a static context. However, the way aggression diffuses in the network has received little attention as it embeds modeling challenges. In fact, modeling how aggression propagates from one user to another, is an important research topic since it can enable effective aggression monitoring, especially in media platforms which up to now apply simplistic user blocking techniques. In this paper, we address aggression propagation modeling and minimization on Twitter, since it is a popular microblogging platform at which aggression had several onsets. We propose various methods building on two well-known diffusion models, Independent Cascade (IC) and Linear Threshold (LT), to study the aggression evolution in the social network. We experimentally investigate how well each method can model aggression propagation using real Twitter data, while varying parameters, such as seed users selection, graph edge weighting, users' activation timing, etc. It is found that the best performing strategies are the ones to select seed users with a degree-based approach, weigh user edges based on their social circles' overlaps, and activate users according to their aggression levels. We further employ the best performing models to predict which ordinary real users could become aggressive (and vice versa) in the future, and achieve up to AUC=0.89 in this prediction task. Finally, we investigate aggression minimization by launching competitive cascades to "inform" and "heal" aggressors. We show that IC and LT models can be used in aggression minimization, providing less intrusive alternatives to the blocking techniques currently employed by popular online social network platforms.

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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