计算机科学 ›› 2016, Vol. 43 ›› Issue (2): 135-139.doi: 10.11896/j.issn.1002-137X.2016.02.030
朱冠桦,蒋国平,夏玲玲
ZHU Guan-hua, JIANG Guo-ping and XIA Ling-ling
摘要： 社交网络中谣言的爆炸性传播现象已引起了研究人员的关注,其传播机制及相应模型的研究对于控制网络谣言的传播至关重要。 受社会网络中的从众现象的启发,在传统SIR谣言传播模型的基础上,考虑到社交网络中的谣言具有全局信息特征,其从众效应具有个体差异性,以及社交网络的规模和拓扑特性(均质和异质网络)对谣言传播的影响,首先建立了两个适用于均质网络和异质网络的改进的SIR谣言传播模型动力学方程组；然后利用蒙特卡罗方法对谣言传播演化过程进行了仿真,结果表明,相对于传统模型,基于这两个方程组的模型能有效体现社交网络中的从众现象对于谣言传播的增幅作用。此外,改进的模型揭示并体现了实际社交网络中谣言传播在从众现象的影响下的规律:蛊惑性较强的谣言传播率提升空间有限,增幅效应较小；蛊惑性较弱的谣言提升空间大,转发的人越多,从众效应的增幅越大,传播的速度越快,爆发到顶峰的时间越短；社交网络规模的增大可以显著削弱从众现象对谣言的增幅作用。
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