How to control public emergencies? An alterable-structure evolutionary game model analysis

This paper analyzes an alterable-structure evolutionary game model based on subjective game idea, which players are fixed but the strategies set and payoff are changing along with the environment change. Then it analyzes the main factors influencing diffusion course of public emergency thatpsilas game payoffs and information diffusing speed. Based on the diffusion functions in crisis phase and convergent function in transforming phase, it gets the governmental control measures. In the crisis phase, government organizations should control the relative information diffusion and adjust the former ossified system as soon as possible at the same time. Once public emergency gets into the transforming phase, government organizations should duly open the relative information in order to induct the public cognition to achieve the new stable equilibrium.