自我网络中邻域模式的自动发现系统
An Automated System for Discovering Neighborhood Patterns in Ego Networks
摘要:
一般来说,社会网络分析往往侧重于网络的拓扑结构,而不考虑其中所涉及的个人的特征。由于个体是图的基本实体,因此对个体行为的研究较少。给定一个移动社交网络图,从节点中提取关键信息的好特征是什么?自我节点存在多少种不同的邻域模式?这些信息为长期研究节点提供了什么线索?在这份报告中,我们开发了一个自动化系统,以发现发生的原型自我为中心的模式从数据。我们的目标是提供一个数据驱动的工具,用于行为科学的图形解释。我们分析来自智能手机收集的真实数据的社交网络。我们选择了13个著名的网络措施,特别是那些与自我图。我们形成八个特征子集,然后使用无监督聚类技术来评估它们的性能,以发现以自我为中心的模式。从聚类分析中,我们发现八个不同的邻居模式已经出现。这种分类允许在用户数据随时间变化时对其进行简明分析。结果提供了一个细粒度的分析,不同的功能集的贡献,以检测独特的聚类模式。最后,作为一个案例研究,两个数据集进行了长期的研究,以证明该方法的实用性。该研究表明,所提出的方法在发现数据的重要趋势的有效性。
英文摘要:
Generally, social network analysis has often focused on the topology of the network without considering the characteristics of individuals involved in them. Less attention is given to study the behavior of individuals, considering they are the basic entity of a graph. Given a mobile social network graph, what are good features to extract key information from the nodes? How many distinct neighborhood patterns exist for ego nodes? What clues does such information provide to study nodes over a long period of time? In this report, we develop an automated system in order to discover the occurrences of prototypical ego-centric patterns from data. We aim to provide a data-driven instrument to be used in behavioral sciences for graph interpretations. We analyze social networks derived from real-world data collected with smart-phones. We select 13 well-known network measures, especially those concerned with ego graphs. We form eight feature subsets and then assess their performance using unsupervised clustering techniques to discover distinguishing ego-centric patterns. From clustering analysis, we discover that eight distinct neighborhood patterns have emerged. This categorization allows concise analysis of users' data as they change over time. The results provide a fine-grained analysis for the contribution of different feature sets to detect unique clustering patterns. Last, as a case study, two datasets are studied over long periods to demonstrate the utility of this method. The study shows the effectiveness of the proposed approach in discovering important trends from data.
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