arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.03403cs.SIcs.DScs.LG
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网络推理与样本影响力最大化

Network Inference and Influence Maximization from Samples

Institute of Computing Technology, Chinese Academy of Sciences(中国科学院计算技术研究所);University of Chinese Academy of Sciences(中国科学院大学);Microsoft Research Asia(微软亚洲研究院)

Zhijie Zhang, Wei Chen, Xiaoming Sun, Jialin Zhang

摘要:

影响力最大化是在社交网络中选择少量种子节点以最大化从这些种子传播的影响力的任务。在过去的二十年里,它得到了广泛的研究。在规范设置中,社会网络及其扩散参数作为输入。在本文中,我们考虑了更现实的采样设置,其中网络是未知的,我们只有一组被动观察的级联,记录在每个扩散步骤的激活节点集。我们研究了这些级联样本(IMS)的影响力最大化的任务,并提出了常数近似算法,它在种子集分布的温和条件下。为了实现优化目标,我们还提供了一种新的解决方案的网络推理问题,即学习扩散参数和网络结构的级联数据。与以往的解决方案相比,我们的网络推理算法需要更弱的假设,不依赖于最大似然估计和凸规划。我们的IMS算法通过允许恒定的近似比来增强学习然后优化的方法,即使当扩散参数很难学习时,我们也不需要任何与网络结构或扩散参数相关的假设。

英文摘要:

Influence maximization is the task of selecting a small number of seed nodes in a social network to maximize the influence spread from these seeds. It has been widely investigated in the past two decades. In the canonical setting, the social network and its diffusion parameters are given as input. In this paper, we consider the more realistic sampling setting where the network is unknown and we only have a set of passively observed cascades that record the sets of activated nodes at each diffusion step. We study the task of influence maximization from these cascade samples (IMS) and present constant approximation algorithms for it under mild conditions on the seed set distribution. To achieve the optimization goal, we also provide a novel solution to the network inference problem, that is, learning diffusion parameters and the network structure from the cascade data. Compared with prior solutions, our network inference algorithms require weaker assumptions and do not rely on maximum-likelihood estimation and convex programming. Our IMS algorithms enhance the learning-and-then-optimization approach by allowing a constant approximation ratio even when the diffusion parameters are hard to learn, and we do not need any assumption related to the network structure or diffusion parameters.

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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