中文摘要：

结合实际的社交网络使用行为，在分析社交网络舆情传播模式的基础上，构建了社交网络舆情传播模型。详细分析了影响传播概率的主要因素，建立了以信息风险感知为主的传播概率的数学模型。仿真结果表明：获知概率的大小对舆情传播规模、弛豫时间均有影响；而信息风险感知的大小对舆情传播规模的影响不大，对弛豫时间的影响较大，究其根源在于信息风险感知直接决定了传播概率的取值，而传播概率直接决定了网络中传播者的数量。

英文摘要：

In view of practical behavior of social network users, this paper analyzes the modes of public opinion in social network, con-structs a dissemination model of public opinion in social network and built a mathematical model for spread probability based on perceived information risk. The results of simulation show that：informed probability has effect on the diffusion scale and the relaxation time;mean-while, perceived information risk has a greater impact on the relaxation time. The cause is that the spread probability can determine the number of spreaders directly, and the spread probability is determined by perceived information risk.