重大突发事件中政媒与官媒协同演化机制研究

——以“7·24"北京暴雨为例

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中图分类号：G206 文献标识码：A 文章编号：1003-7136（2026）03-0076-07

Abstract：Based onsocial network analysis and text analysis，this paper selects thecase of Beijing rainstorm on July 24th in 2O25.From a static perspective，it analyzes the network stucture and node atributes of network public opinion in major emergencies.From a dynamic perspective，it delves into the thematic features and dynamic changes of the network structure betweengovernment-afiliated mediaandoficial media.Thisstudyfindsthat：Firstly，the publicopinion network of the Beijing rainstormexhibits distinct 'small-world"characteristics，providinga structural supportforcollaboration between government-afiliated media andofilial media govermment-media andoffcinl media.Secondly，ordinary netizens as non-keynodes generatealong-tailefect，amplifyingthe impactof theircollaboration;opinion leadersacting asbridge nodes facilitate hierarchical coordination，continuously empowering their collaborationand servingasa potential force to influence the directionof publicopinion.Thirdly，they have exhibitedphasedcharacteristicsof"implicitcollaboration-distributedcollaboration-integratedcollaboration"atdierent stages，forming functional complementarity and coupled interaction.

Keywords ：social network analysis ; major emergencies ;collaborative governance theory;BERTopic model;media

网络舆情是现实社会的客观反映，是整体舆情导向的“晴雨表”。（剩余10046字）