期刊
PHYSICS LETTERS A
卷 373, 期 12-13, 页码 1105-1110出版社
ELSEVIER
DOI: 10.1016/j.physleta.2009.02.004
关键词
Social networking site; Online social network; Complex network; Structural evolution; Assortativity-disassortativity transition
资金
- NSF [60674045]
Although recently there are extensive research on the collaborative networks and online communities, there is very limited knowledge about the actual evolution of the online social networks (OSN). In the Letter, we study the structural evolution of a large online virtual community. We find that the scale growth of the OSN shows non-trivial S shape which may provide a proper exemplification for Bass diffusion model. We reveal that the evolutions of many network properties, such as density, clustering, heterogeneity and modularity, show non-monotone feature, and shrink phenomenon occurs for the path length and diameter of the network. Furthermore, the OSN underwent a transition from degree assortativity characteristic of collaborative networks to degree disassortativity characteristic of many OSNs. Our study has revealed the evolutionary pattern of interpersonal interactions in a specific population and provided a valuable platform for theoretical modeling and further analysis. (C) 2009 Elsevier B.V. All rights reserved.
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