基于用户相对权重的在线社交网络舆情传播控制模型

在线社交网络(online social networks,OSN)中舆情传播干预时机的选择对网络舆情的管控具有重要意义.通过分析用户的网络地位、社会强化效应与用户感知价值等影响网络舆情传播控制的关键因素,以研究舆情管控的合理干预时机为目的,构建了基于用户相对权重的网络舆情传播控制模型.基于该模型,针对两类OSN开展仿真研究.研究发现,网络舆情传播与信息初始传播源的网络地位密切相关;在开放式OSN中,存在与干预时机选择关系密切的关键相变点;用户活跃度随社会强化效应强度的增大而下降,随干预时机的提前而降低,并存在有效干预时机区间;"悖民意"成本是干预时机选择的重要衡量指标.并据此,提出了相应现实干预时机选择的对策建议.

Dissemination and control model of public opinion in online social networks based on users' relative weight

Choosing the right time to intervene public opinion dissemination is of great significance to the control of public opinion in online social networks (OSN). The key factors affecting the control of public opinion dissemination, such as user' network status, social strengthening effect and users' perception value, are analyzed. Aimed to identify the reasonable timing for intervention, a dissemination and control model of public opinion based on users' relative weight is constructed. Based on this model, simulation researches are carried out in two types of OSN. The results show that public opinion dissemination is closely related to the initial disseminator' network status; there exits a key phase transition point, which is related to timing of intervention in open OSN; users' activity decreases with the increase of the social strengthening effect's intensity, also decreases with the advance of intervention, and there exits an effective interval for intervention; the cost of "contrary to popular will" should be an important index for timing of intervention. Finally, the corresponding countermeasures for choosing the right time to intervene in reality are proposed.