中文摘要：

研究了社交网络中信息传播机制并建立了数学模型模拟传播过程。通过分析信息在社交网络中的传播特点,结合传播动力学中的羊群效应及信息老化效应,以经典的SIR传染病模型为基础,建立了符合在线社交网络中谣言传播特性的信息传播模型,对网络中的各状态人数变化趋势进行数值仿真。最后分析了网络中一类谣言传播及雇佣网络推手进行辟谣对谣言传播动力学的影响。实验结果表明,在最佳时间点雇佣网络推手进行辟谣,经济损失减至最小,并且能有效抑制谣言传播。为相关职能部门在舆情监控决策方案上提供了理论分析。

英文摘要：

The information transmission mechanism in social network is researched and propagation process of mathematical model is established. Through analyzing the characteristics of the transmission for information in social networks, combined with the effect of herd behaviour in transmission dynamics and information obsolescence,on the basis of classical SIR model, the information transmission model in accordance with rumor propagation characteristics in online social network is established, and the numerical simulation of the changing trend of the number of states in networks is carried out. In particular, the online business rumors and the effect of employing Net-cheaters to refute a rumor are analyzed. The experiments show that it has found the optimal time point to make the economic losses to the minimum and inhibits the spread of rumor effectively. Additionally, the result provides relevant departments with a theoretical analysis on the cyberspace public opinion.