Model, algorithm, application of information dissemination in online social networks Research on the mechanism of information diffusion in social networks Research on electronic word-of-mouth information diffusion model in online social networks 并列题名：Research on electronic word-of-mouth information diffusion model in online social networks Public opinion topic propagation mechanism in online social networks 并列题名：Public opinion topic propagation mechanism in online social networks 并列题名：Theory and application of community discovery and link prediction in weighted social networks