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arXiv 1701.05352cs.SIphysics.soc-ph
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寻找低压力社区

Finding low-tension communities

Esther Galbrun, Behzad Golshan, Aristides Gionis, Evimaria Terzi

摘要:

受在线社交媒体和协作网络中出现的应用程序的启发,社区搜索和团队组建问题已经有了很多工作。在前一类问题中,目标是找到满足一定连通性要求并包含给定种子节点集合的子图。另一方面,在后一类问题中,目标是找到集体拥有任务所需技能的个体,并形成具有某些属性的连通子图。在本文中,我们扩展了社区搜索和团队形成的问题相关联的个人资料。个人资料是一个数字分数,量化了个人在某个主题上的位置。我们采用一个模型,每个人都从一个潜在的个人资料开始,并通过一个动态的构象过程,考虑到个人的社会互动和趋势,以符合一个人的社会环境,达到一个符合的个人资料。在这一框架下,社会紧张关系产生于相邻个体的一致性特征之间的差异,以及个体的一致性特征与潜在性特征之间的差异。给定一个网络的个人,他们的潜在配置文件和这个构象的过程中,我们扩展了社区搜索和团队形成的问题,要求输出子图具有低的社会张力。从技术的角度来看,我们研究这些问题的复杂性,并提出有效解决这些问题的算法。我们在一些社交网络的实验评估揭示了我们的方法的有效性和效率。

英文摘要:

Motivated by applications that arise in online social media and collaboration networks, there has been a lot of work on community-search and team-formation problems. In the former class of problems, the goal is to find a subgraph that satisfies a certain connectivity requirement and contains a given collection of seed nodes. In the latter class of problems, on the other hand, the goal is to find individuals who collectively have the skills required for a task and form a connected subgraph with certain properties. In this paper, we extend both the community-search and the team-formation problems by associating each individual with a profile. The profile is a numeric score that quantifies the position of an individual with respect to a topic. We adopt a model where each individual starts with a latent profile and arrives to a conformed profile through a dynamic conformation process, which takes into account the individual's social interaction and the tendency to conform with one's social environment. In this framework, social tension arises from the differences between the conformed profiles of neighboring individuals as well as from differences between individuals' conformed and latent profiles. Given a network of individuals, their latent profiles and this conformation process, we extend the community-search and the team-formation problems by requiring the output subgraphs to have low social tension. From the technical point of view, we study the complexity of these problems and propose algorithms for solving them effectively. Our experimental evaluation in a number of social networks reveals the efficacy and efficiency of our methods.

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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