Abstract
The online public opinion is the sum of public views, attitudes and emotions spread on major public health emergencies through the Internet, which maps out the scope of influence and the disaster situation of public health events in real space. Based on the multi-source data of COVID-19 in the context of a global pandemic, this paper analyzes the propagation rules of disasters in the coupling of the spatial dimension of geographic reality and the dimension of network public opinion, and constructs a new gravity model-complex network-based geographic propagation model of the evolution chain of typical public health events. The strength of the model is that it quantifies the extent of the impact of the epidemic area on the surrounding area and the spread of the epidemic, constructing an interaction between the geographical reality dimension and online public opinion dimension. The results show that: The heterogeneity in the direction of social media discussions before and after the “closure” of Wuhan is evident, with the center of gravity clearly shifting across the Yangtze River and the cyclical changing in public sentiment; the network model based on the evolutionary chain has a significant community structure in geographic space, divided into seven regions with a modularity of 0.793; there are multiple key infection trigger nodes in the network, with a spatially polycentric infection distribution.
Highlights
China adopts active prevention and control measures to effectively control the development of the Corona Virus Disease 2019 (COVID-19) pandemic [1]
The period from 10 January to January, during which the number of public opinion changes on Weibos was relatively stable, the period from January to 25 January, during which the number of discussions on Weibos increased sharply, can be described as a period of rapid growth in public opinion discussions, which was related to the phenomenon of “human-to-human transmission” as confirmed by academician Zhong Nanshan, followed by the continued fermentation of the pneumonia outbreak
From the perspectives of traditional public opinion analysis and geographic location analysis, we explore the migration of the center of gravity of public opinion on social media, and the clustering/anomalies of epidemic communities
Summary
China adopts active prevention and control measures to effectively control the development of the Corona Virus Disease 2019 (COVID-19) pandemic [1]. On January 2020, the number of diagnosed cases in Hubei province exceeded 100 in a single day and Hubei Province launched a level II public health emergency response. On January 2020, at 10:00 a.m., Wuhan was under lockdown. Its public transportation such as subways, ferries, long-distance passenger were suspended, and the airport and railway stations were temporarily closed. On January 2020, a total of 830 confirmed cases have been reported nationwide and Hubei Province launched the level I response to public health emergencies. Medical teams all over the country have been sent to aid Hubei, and Wuhan has become the focus of people’s concern. After 76 days of active anti-epidemic efforts, Wuhan announced on
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