Research On The Topic Evolution Mechanism Of Emergency Events In Weibo Public Opinion

With the development of the Internet,people can obtain information,express views and exchange views through the network,which also forms the online public opinion.Online public opinion is the manifestation of social public opinion in network space,which is formed more rapidly and develops more rapidly.With the popularity of smart phones,network users get information more convenient and fast.The emergence of weibo platform meets the needs of network users to express their views and communicate their views on current events.Since the media era began.As an important part of online public opinion,weibo public opinion has new characteristics in communication and interaction.At present,weibo platform has become an important position of online public opinion.Official institutions,media institutions,opinion leaders and ordinary users can find their new positions in weibo platform.When a hot event occurs,weibo users will make comments according to their own concerns about the hot event,communicate with other weibo users,and finally form a discussion topic.A large number of weibo users' attention to hot events from different perspectives will form many topics for discussion.With the development of the event and the deepening of the discussion,the topics discussed will change,the old topics will be less popular,and the new topics will be generated from the discussion of the old topics,which is the phenomenon of discussion topic evolution.There are some rules to follow in the evolution of discussion topics.By constructing the logical relationship between different discussion topics,we can explore the mechanism of topic evolution,summarize the path of topic evolution,and better understand the phenomenon of topic evolution.In order to explore the topic evolution mechanism of weibo public opinion generated by emergencies,this paper constructs the topic evolution mechanism of weibo public opinion in emergencies and clarifies the topic evolution path of weibo public opinion in emergencies through the elaboration of relevant theories,the definition of relevant connotation,the evolution form and the analysis of evolution elements.On this basis,the relevant data of specific emergencies are collected,and an empirical study is carried out based on an example to verify the correctness and practicability of the evolution mechanism and evolution path of the public opinion topic of the emergency.Finally,the relevant guidance strategies are put forward in different dimensions.