Supply And Demand Of Materials In Public Health Emergencies Under The New Media Environment

Public health emergencies have happened frequently in recent years.Since 21 Century,3major outbreaks of epidemic have occurred worldwide,which are the Severe Acute Respiratory Syndrome(SARS)outbreak in 2003,the Middle East Respiratory Syndrome(MERS)outbreak in 2012 and 2015,and the COVID-19 outbreak in 2019.With the improvement of life convenience and the acceleration of globalization,public health emergencies are more likely to spread in a large scale,and is more difficult to be controlled.The requirements for effective official response and accurate dispatch of emergency medical supplies are also more stringent.With the rapid development of the Internet and mobile value-added,social events and actions of government are becoming more and more transparent.Events are no longer a single offline development,but the online and offline interaction.Therefore,online public opinion of public emergencies is also a key point which deserves attention.This paper studies how Internet public opinion affects Internet users’ material purchasing behavior and material supply and demand in the era of new media.The research contents are as follows:(1)Complete the relevant literature review.Use Cite Space to summarize the status,focus and development trend of domestic and foreign related researches.(2)Establish a dynamic model including public opinion subsystem,public health emergency subsystem and material demand and supply subsystem.Draw causal loop diagram and flow stock diagram.Determine variable equations and parameters.(3)Take the COVID-19 epidemic situation in Wuhan from February 22 to April 1,2020 as a research case,to test the stability and sensitivity of the model.Using the control variable method,study from three aspects: network public opinion controlling,public health emergency controlling and material demand supplying,to seek effective control strategies of public health emergencies.The purpose of this paper is to provide reference for the decision-making in public health emergencies.The study found that:(1)The model constructed in this paper can simulate Wuhan COVID-19 epidemic commendably,and can effectively pass the sensitivity and stability test;(2)It is very important to improve the government handling power,transparency and satisfaction of the incident handling in the early stage of the event.The key to reduce the popularity of online public opinion is to meet the needs of netizens’ participation.Releasing official information in time to avoid the outbreak of negative public opinion.(3)The key point of public health emergency controlling is to cut off the transmission route and protect the susceptible population,which can be realized from multiple perspectives.From the perspective of infected people,we need to pay attention to improve the isolation rate and the diagnosis rate.The earlier the diagnosis and isolation is realized,the more the number of final infected people can be reduced.From the perspective of susceptible population,we need to improve the public’s vigilance and then reduce the contact rate;(4)The outbreak of public health emergencies usually leads to the crazy rush purchase of one or several kinds of materials.The demand for related materials will soar rapidly in the short term,which is easy to cause material shortage.In order to cope with the sudden increase of the demand for emergency materials,it is necessary to guide the public to purchase rationally in time.At the same time,it is necessary to improve the government’s emergency scheduling level and attention,so as to improve the government’s emergency capacity and reduce the negative impact of material shortage.