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arXiv 1702.01844cs.SI
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热门话题传播更快:在线社交网络影响力传播的新维度

Popular Topics Spread Faster: New Dimension for Influence Propagation in Online Social Networks

Tianyi Pan, Alan Kuhnle, Xiang Li, My T. Thai

摘要:

在线社交网络(Online Social Network,OSN)的信息传播速度快,成为病毒式营销的重要平台。尽管在过去的十年中,OSN中的病毒式营销相关问题已经得到了广泛的研究,但现有的工作都假设已知的传播速率,并且无法解决流行主题的速率可能动态增加的情况。在本文中,我们提出了一种新的模型,动态影响传播(DIP),它允许传播速率的变化过程中的扩散,可以用来描述信息传播在OSN更真实。在DIP的基础上,我们定义了一个新的研究问题:DIP下的阈值激活问题(TAP-DIP)。TAP-DIP比TAP更一般化,可用于DIP模型的研究。然而,它在已经存在的P-hard TAP问题上又增加了一层复杂性。尽管它的硬度,我们能够近似TAP-DIP与$O(\log|V|)$的比例。我们的解决方案包括两个主要部分:1)Lipschitz优化技术和2)一个新的解决方案的一般版本的TAP,多TAP问题。我们使用各种真实的OSN数据集对我们的解决方案进行了实验测试,并证明了我们的解决方案不仅在知道速率增加时生成高质量但小得多的种子集,而且具有可扩展性。此外,考虑DIP与否对结实率的选择有显著影响。

英文摘要:

Information can propagate among Online Social Network (OSN) users at a high speed, which makes the OSNs become important platforms for viral marketing. Although the viral marketing related problems in OSNs have been extensively studied in the past decade, the existing works all assume known propagation rates and are not able to solve the scenario when the rates may dynamically increase for popular topics. In this paper, we propose a novel model, Dynamic Influence Propagation (DIP), which allows propagation rates to change during the diffusion and can be used for describing information propagation in OSNs more realistically. Based on DIP, we define a new research problem: Threshold Activation Problem under DIP (TAP-DIP). TAP-DIP is more generalized than TAP and can be used for studying the DIP model. However, it adds another layer of complexity over the already \#P-hard TAP problem. Despite it hardness, we are able to approximate TAP-DIP with $O(\log|V|)$ ratio. Our solution consists of two major parts: 1) the Lipschitz optimization technique and 2) a novel solution to the general version of TAP, the Multi-TAP problem. We experimentally test our solution Using various real OSN datasets, and demonstrate that our solution not only generates high-quality yet much smaller seed sets when being aware of the rate increase, but also is scalable. In addition, considering DIP or not has a significant difference in seed set selection.

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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