摘要：

Abstract:

【Purpose/significance】Public opinion has become an important factor affecting government decision-making and social sta⁃

bility. The quantitative analysis of public opinion hot-degree of public crisis events is helpful for government departments to judge

public opinion situation timely and effectively.【Method/process】We found that the formation mechanism of Internet public opinion

hot-degree of public crisis events is similar to the principle of thermal effect of electric current, and demonstrate the rationality of con⁃

structing the Internet public opinion hot-degree model based on Joule's law from the perspective of qualitative analysis. Then, we con⁃

struct the measurement model of Internet public opinion hot-degree from five dimensions: emergencies, netizens, media, government

and duration based on logical relations of variables in Joule's Law.【Result/conclusion】Taking the top ten public crisis events in the

"China Internet Public Opinion Analysis Report 2018" as research cases, applying the model constructed in this study, we calculate

and rank the Internet public opinion hot-degree value of each case, which is compared respectively with the ranking and interval of In⁃

ternet public opinion hot-degree of each case in the above official report and calculating results based on Grey Relational Analysis.

The above comparative analysis results verify that the Internet public opinion hot-degree model based on Joule's law is reasonable, fea⁃

sible and accurate.【Innovation/limitation】In this paper, the physical thought is applied to solve the management issues, which pro⁃

vides a new research perspective for public opinion research. This study aims to provide theoretical support and measurement basis for

the government to effectively evaluate the reality of Internet public opinion.