中文摘要：

刻画谣言在微博上的快速传播状态，研究影响谣言传播的关键因素。基于传染病的基础模型，将受众扩展为5类（无知者、接触者、传播者、沉寂者、失去兴趣者），引入兴趣衰减系数描述个体多次接触谣言时转发兴趣降低状态，同时考虑了个体只会转发一次的现实状况。为验证模型的有效性，对模型进行了多主体仿真，并将仿真数据与两个真实案例的数据对比，发现构建的模型可以较好地拟合现实情况。通过仿真实验，对不同因素的系数进行对比分析，发现改变兴趣衰减系数、首次转发概率以及小世界网络的属性都显著影响了微博的传播演进过程。

英文摘要：

This article focuses on the evolution of the rapid rumor spread on the microhlog and the key factors affecting the spread of rumors. Based on the model of infectious diseases, expanded the people to the five class （ignorant, infected, contacted, exhausted, resistant）, add the coeffi- cient of interest decay to the model, and the individual just can be forward the rumor once. To verify the validity of the model, we made the multi-agent simulation, and made comparison to the simulation data and the data from two real cases. We found the model can be fit reality well. Through simulation experiments, the coefficients of different factors were analyzed and found that the coefficient of interest decay, the first forwarding probability and the properties of small world networks can significantly affect the evolution of the spread.