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Abstract and Applied Analysis
Volume 2013 (2013), Article ID 893961, 13 pages
http://dx.doi.org/10.1155/2013/893961
Research Article

Hot Topic Propagation Model and Opinion Leader Identifying Model in Microblog Network

School of Information Science and Technology, Jinan University, Guangzhou 510632, China

Received 15 August 2013; Revised 30 October 2013; Accepted 3 November 2013

Academic Editor: Rafael Jacinto Villanueva

Copyright © 2013 Yan Lin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

As the network technique is fast developing, the microblog has been a significant carrier representing the social public opinions. Therefore, it is important to investigate the propagation characteristics of the topics and to unearth the opinion leaders in Micro-blog network. The propagation status of the hot topics in the Micro-blog is influenced by the authority of the participating individuals. We build a time-varying model with the variational external field strength to simulate the topic propagation process. This model also fits for the multimodal events. The opinion leaders are important individuals who remarkably influence the topic discussions in its propagation process. They can help to guide the healthy development of public opinion. We build an AHP model based on the influence, the support, and the activity of a node, as well as a microblog-rank algorithm based on the weighted undirected network, to unearth and analyze the opinion leaders’ characteristics. The experiments in the data, collected from the Sina Micro-blog from October 2012 to November 2012 and from January 2013 to February 2013, show that our models predict the trend of hot topic efficiently and the opinion leaders we found are reasonable.