中文摘要：

对微博社区网络的静态结构特征及相应的信息传播特性进行研究，有助于把握微博社区中的信息传播规律、网络舆情演化机理和人际交往模式等特性。本文以从新浪微博社区获取的数据集合为样本。首先采用社会网络分析方法研究了微博社区网络的统计特性、结构特征等静态属性，发现微博社区中存在着人际关系的局部趋中心性与整体分散性并存以及局部人际关系脆弱等特征；然后构建了基于意见更新的舆情传播模型，并模拟了舆情信息在微博社区网络中的传播过程，研究了微博社区网络结构对舆情传播的影响，指出了微博舆情在传播过程中的变化规律；最后分析了微博舆情传播过程的随机性和传播行为的不可预测性，提出并论述了可以基于主体建模和仿真的研究方法对微博舆情传播规律进行更准确的描述。

英文摘要：

The study about the static structure and propagation characteristics of mieroblog social network is helpful for understanding the propagation process, online public opinion evolution mechanism and interpersonal communication mode in microblog community. In this paper, we took a real data set collected from Sina microblog community as the research sample. Firstly,we studied the statistical characterization and structural characteristics of the microblog community network with the social network analysis method,and we found that in Sina Microblog community, the interpersonal relationship was both centralized and decentralized, and the interpersonal relationship was also fragile. Then we constructed a public opinion propagation model based on the updated opinion, and simulated the process that the public opinion spread through microblog community, we also explored the roles that microblog community network structure played in this process and the evolution rule of public opinion spread in microblog community. Finally, we discussed the unpredictability and randomness propagation behavior of public opinion spread process in microblog communication, and proposed that the future study about propagation characteristics could use multi-agent modeling and computer simulation strategies to get a more accurate description of microblog public opinion propagation process.