Xie Lei An Lu
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After the outbreak of public emergencies, there are often several hot spots in the online public opinion. But some important issues are ignored by the public. Then blind spots of public opinion are formed. In view of the limitation of hot spots of online public opinion, this study constructs a blind spot detection method under the situation of public emergency, to identify the blind spots that are not or less paid attention to in the development of public opinion, and to make public opinion develop in a reasonable direction and effectively solve various problems arising from public emergencies. Taking a public health emergency as an example, this study constructs a focus system that should be paid attention to in each stage of emergency management based on the 4R theory. We obtained the microblog data of Shijiazhuang epidemic for topic extraction, and detected the blind spots by comparing the differences between the focus system and public opinion topics. It is found that in the forming period of public opinion, the establishment of early warning system, compiling emergency response plan, regular training are the blind spots. In the period of climax, topics such as nosocomial infection control, material supervision, information reporting, preventing imported cases and patient management are blind spots. For the disappearing period, topics such as perfecting legal system, reward and punishment, aftermath disposal are blind spots. The blind spot detection method of public opinion proposed in this paper provides a quantitative reference and the method for scientific judgment and intervention strategy of the topic distribution of online public opinion, and provides a useful reference for the disposal of public emergencies.