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arXiv 1001.3181cs.SIcond-mat.stat-mechphysics.soc-ph
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弱联系:在线社交网络中信息扩散的微妙作用

Weak ties: Subtle role of information diffusion in online social networks

Jichang Zhao, Junjie Wu, Ke Xu

摘要:

在线社交网络作为一种社会化媒体,在社会信息扩散中发挥着至关重要的作用。然而,由于其独特的复杂性,在线社交网络中的扩散机制不同于其他类型的网络,我们仍然不清楚。同时,很少有研究揭示在线社交网络的结构和扩散的耦合动力学。为此,在本文中,我们提出了一个模型来研究如何在网上社交网络的结构与扩散的弱联系的角度。通过在大规模在线社交网络上的数值实验,我们发现与以往的一些研究结果相比,选择弱关系优先发布并不能使信息快速扩散,而随机选择可以实现这一目标。然而,当我们逐渐去除弱联系时,即使在随机选择的情况下,信息的覆盖率也会急剧下降。通过分析和实验,对这一现象给出了合理的解释.最后,我们得出结论,弱关系在在线社交网络中的信息扩散中起着微妙的作用。一方面,它们充当了将孤立的地方社区联系在一起的桥梁,突破了信息的地方陷阱。另一方面,选择它们作为优先发布的路径并不能帮助信息在网络中进一步传播。因此,弱联系可能在控制病毒传播和实际应用中的私有信息扩散方面有所帮助。

英文摘要:

As a social media, online social networks play a vital role in the social information diffusion. However, due to its unique complexity, the mechanism of the diffusion in online social networks is different from the ones in other types of networks and remains unclear to us. Meanwhile, few works have been done to reveal the coupled dynamics of both the structure and the diffusion of online social networks. To this end, in this paper, we propose a model to investigate how the structure is coupled with the diffusion in online social networks from the view of weak ties. Through numerical experiments on large-scale online social networks, we find that in contrast to some previous research results, selecting weak ties preferentially to republish cannot make the information diffuse quickly, while random selection can achieve this goal. However, when we remove the weak ties gradually, the coverage of the information will drop sharply even in the case of random selection. We also give a reasonable explanation for this by extra analysis and experiments. Finally, we conclude that weak ties play a subtle role in the information diffusion in online social networks. On one hand, they act as bridges to connect isolated local communities together and break through the local trapping of the information. On the other hand, selecting them as preferential paths to republish cannot help the information spread further in the network. As a result, weak ties might be of use in the control of the virus spread and the private information diffusion in real-world applications.

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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