关键词: 社会群体事件, 复杂网络, 微博传播, 主成分分析, 中心性指标

Abstract:

To help people have a better understanding of the mechanism of message dissemination in micro-blog when mass incident happens and have a better idea of how to identify the key users in the diffusion network, the micro blog of social group events is analyzed based on the real case communication data by combining qualitative analysis and quantitative research. Besides, a micro blog communication system of group events is constructed through the information forwarding relationship of events. Moreover, a comprehensive evaluation model of the importance of group event user communication is constructed through the principal component analysis of some basic communication indicators. Furthermore, a correlation analysis of the evaluation value of the model and the central indicators of complex network is carried out in combination with the related theory of complex network. The analysis and research indicate that the network of group events is a complex network with a scale-free nature, small world characteristics, and a high clustering coefficient, in which, the evaluation value of user communication importance is highly correlated with the K-core decomposition index of the user complex network. Therefore, people can rely on the K-core decomposition analysis method to find more accurate and effective important users who affect group event micro blog communication.

Key words: mass incidents, complex network, diffusion in micro-blog, principal component analysis, centrality