中文摘要：

针对传统社交网络缺乏用户关系描述方法的问题,从用户关系角度出发,引入信任作为表征用户关系的要素,提出一种信任链形式化模型（TCFM）。采用形式化语义的方式对用户之间的关系进行描述,将用户关系表示为原子信任链和组合信任链2类关系模型,进而给出TCFM组合信任链中信任度的计算过程以及信任链之间的计算算子。通过实例验证了该模型的有效性。

英文摘要：

In traditional research of social network,a challenge is that there are few attentions which are paid to users’ relationship representation.To solve this problem,trust is introduced in this paper to describe the relationships among users.A description method of trust chain formal model is proposed,and the model is classified into two types： meta trust chain and combined trust chain.Moreover,trust degree computation method of Trust Chain Formal Model（TCFM） and the computation operators between trust chains are presented.Example verifies the model in this paper is effective.