论文标题

重新连接疏远关系:优化不断发展的网络中的影响传播

Reconnecting the Estranged Relationships: Optimizing the Influence Propagation in Evolving Networks

论文作者

Cai, Taotao, Lei, Qi, Sheng, Quan Z., Yang, Shuiqiao, Yang, Jian, Zhang, Wei Emma

论文摘要

影响最大化(IM)旨在从社交网络中选择一组用户,以最大程度地提高受影响的用户的预期数量,最近对大众传播和商业营销受到了极大的关注。专门针对IM问题的现有研究工作取决于一个有力的假设:所选的种子用户愿意在从公司或组织那里获得收益后传播信息。但是,实际上,一些种子用户可能不愿传播信息,或者需要更高的薪水才能动机。此外,现有的IM作品也很少关注以捕获用户在未来时期的影响传播。在本文中,我们针对一个新的研究问题,名为“重新连接顶级关系(RTLR)查询”,该问题旨在找到l以前的现有关系数量,但稍后被弄清,以便重新连接这些关系将在未来的一个时期内受到给定组受到影响的用户的预期利益。我们证明RTLR问题是NP-HARD。提出了一种有效的贪婪算法来通过影响估计技术和精心挑选的链接预测方法来回答RTLR查询,以预测近期的网络结构。我们还设计了一种修剪方法来减少候选边缘的不必要探测。此外,提出了精心设计的基于订单的算法来加速RTLR查询。最后,我们对现实世界数据集进行了广泛的实验,以证明我们提出的方法的有效性和效率。

Influence Maximization (IM), which aims to select a set of users from a social network to maximize the expected number of influenced users, has recently received significant attention for mass communication and commercial marketing. Existing research efforts dedicated to the IM problem depend on a strong assumption: the selected seed users are willing to spread the information after receiving benefits from a company or organization. In reality, however, some seed users may be reluctant to spread the information, or need to be paid higher to be motivated. Furthermore, the existing IM works pay little attention to capture user's influence propagation in the future period as well. In this paper, we target a new research problem, named Reconnecting Top-l Relationships (RTlR) query, which aims to find l number of previous existing relationships but being stranged later, such that reconnecting these relationships will maximize the expected benefit of influenced users by the given group in a future period. We prove that the RTlR problem is NP-hard. An efficient greedy algorithm is proposed to answer the RTlR queries with the influence estimation technique and the well-chosen link prediction method to predict the near future network structure. We also design a pruning method to reduce unnecessary probing from candidate edges. Further, a carefully designed order-based algorithm is proposed to accelerate the RTlR queries. Finally, we conduct extensive experiments on real-world datasets to demonstrate the effectiveness and efficiency of our proposed methods.

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