基于Dempster-Shafer证据理论的信任评估模型

从网格的动态性、分布性、不确定性等特征出发,参考社会学的人际信任关系结构,提出了一种基于Dempster-Shafer证据理论（简称D-S理论）的信任评估模型．该模型根据网格节点间的历史交易记录,给出“直接信任”的形式化描述,建立网格节点信任推荐机制,并利用D-S理论对证据进行组合,从而得到“间接信任”．然后将直接信任和间接信任进一步组合为“综合信任”,从而有效实现信任信息的融合．将本文提出的信任度评估方法应用到调度算法中,结果证明了该信任模型的可行件和实用件．

Trust Evaluation Model Based on Dempster-Shafer Evidence Theory

By analyzing the Grid characteristics and referring to the trust relationship of social people,this paper proposes a trust evaluation model that is based on Dempster-Shafer evidence theory.This model introduces the "direct trust" according to the trade records.The "indirect trust" is presented by combining the recommendation evidences,while the "combined trust" is proposed by combining the direct and indirect trust,so as to implement the complete fusion of all trust information.The application case efficiently proves the trust model proposed is feasible and practical.