为揭示信息扩散的空间特征,利用新浪微博数据,研究了中国地级市间的微博信息扩散,并利用重力模型,研究了影响城际信息扩散的因素。研究表明,少数一二线城市呈现信息寡占型,主导微博内容的输出和扩散。对城际信息交互模型的分析发现,用户数在很大程度上影响了城际信息扩散,城市总GDP也可预测城际信息交互,空间距离则不再发挥作用,微博中的信息扩散打破了物理距离的限制。该研究揭示了线上社交网络与线下物理空间的映射关系以及社交媒体中信息的城际扩散特征,可为空间位置相关的信息发布和网络舆情监控提供借鉴。
To reveal the spatial characteristics of information diffusion, this paper studies the microblog information diffusion among China’s prefecture-level cities utilizing Sina microblog data, and studies the factors influencing the intercity information diffusion using gravity model. We find that a few first and second-tier cities show information monopoly and dominate the output and diffusion of microblog content. The analysis on intercity information interaction models shows that the number of users affects the intercity information diffusion to a large extent, the total GDP of cities can also predict intercity information interaction, and space distance no longer plays a part. The information diffusion in microblog breaks the limit of spatial distance. This study reveals the mapping between online social networks and offline physical space, and the intercity diffusion characteristics of information in social media, which can provide reference for spatial location-related information distribution and online public opinion monitoring.
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