关键词: 社交网络, 舆情话题, 传播模型, 传染病动力学

Abstract: The traditional model can not accurately describe diffusion process of public opinion topic in social network. This paper puts forward a propagation model of public opinion topics in social network based on infectious disease. The propagation characteristics of the social network public opinion topic are analyzed, and then according to the infectious disease diffusion mechanism, the internal infection probability, probability of external infection, immune probability and direct immune probability are introduced into public opinion topic diffusion process and it establishes the propagation model of public opinion topic in social network. The simulation test is carried out on the platform of Matlab 2012 using facebook data set. The simulation experiment results show that the proposed model can accurately describe the propagation behavior characteristics of public opinion topics in social network. Research results can provide valuable reference for social network public opinion management.

Key words: social network, public opinion topics, propagation model, infectious disease dynamics