Research On The Topic Evolution Of Network Public Opinion On Emergency Production Safety Events

In recent years,China's economy has experienced a long period of rapid development,but at the same time of rapid economic development,emergency production safety incidents are common.Once these emergencies happen,they usually arouse high attention and extensive discussion on the network,and form a more serious network public opinion crisis in various domestic forums,Weibo,Zhihu,Douban and other network platforms.The continuous and high attention of the public to the event and the keen discussion on the event related topics make the number of event related network information increase explosively,and the content and release channels of event related information are also very diverse.In today's society,the network has been integrated into all aspects of people's life,and the network public opinion has been paid more and more attention.Due to the high sensitivity of the event,the network public opinion with a large influence range will often formed,and even the network public opinion of the incident will have a negative effect on the development of the incident.Therefore,how to eliminate the false and retain the true,guide the control of public opinion,predict the development trend of public opinion,and finally achieve the effective supervision of the network public opinion on emergency production safety events is an important task for the relevant departments at present.This paper studies the topic evolution trend of network public opinion on emergency production safety events,grasps the trend of the topic evolution of public opinion,so as to deal with the public opinion in time,and can guarantee the harmony and stability of the real society and the network environment.The analysis of the evolution law of the network public opinion on emergency production safety events will help the relevant departments to accurately predict the trend of the network public opinion topic,provide strong support for the further public opinion guidance and management work,so as to avoid the adverse impact and harm caused by the public opinion to the public to the greatest extent.Therefore,it is of great significance to study the topic evolution of network public opinion on emergency production safety events.This study starts with the analysis of the basic theory of the topic evolution of network public opinion on emergency production safety events,combs several classical theories related to the research,and deeply analyzes the characteristics of each stage of the network public opinion on emergency production safety events,the influencing factors of topic evolution and relevant algorithms.Through comparative analysis,LDA algorithm is selected to extract and analyze the topic,which is suitable for the research of network public opinion topic evolution on emergency production safety events.Then,taking the "3·21 explosion accident of Xiangshui chemical enterprise " as an example,we use Python crawler to crawl the original Weibo data about the event on Sina Weibo and process the data.Through these data,we analyze the life cycle,word frequency and topic evolution trend of the event network public opinion in detail and prove the applicability of LDA Algorithm.At last,the conclusion and Prospect of this study are put forward.