Topical Evolution Patterns Of Stakeholders In Socal Media Platforms Regarding Public Health Emergencies

Public health emergencies are more likely to cause panic,and lead to a collective discussion among people because of the high harmfulness and invasiveness.Social media platforms such as Sina Weibo and WeChat play an indispensable role in information production and communication.If the government does not find and remove the extreme views and negative feelings in time,it is likely to cause serious irregularities.Based on different groups,stages and platforms,we analyze and study the topic and evolution pattern of public health emergencies.The dissertation reveals the interaction between topics and stakeholders,analyzes main focus at different stages and stakeholders,and then concludes topical evolution patterns on public health emergencies.The study can provide the secundum for judging online public opinions.It is helpful for early-warning before the emergency occurs,emergency response at the time of the emergency and assessment after the emergency.The results help governments guide the public opinions,remove negative information for specific population,strengthen information monitoring at social platforms from the source,and then reduce the cost of social risk management.In this paper I divide stakeholders lifecycle phases on the base of the stakeholder theory and lifecycle theory.I utilize the Latent Dirichlet Allocation model based on Relevance to compare and analyze similarities and differences of topics and characterize their evolution patterns which involve stakeholders,lifecycle phases and content features in microbloges and WeChat entries regarding the Middle East Respiratory Syndrome(MERS)outbreak.