Abstract: As the important resource in semantic network and the requirement on reliable measurement of evidence,the importance for researching trust of knowledge was reflected.Aiming at the trust of knowledge,the credibility evaluation system of knowledge resource under the network environment with the ontology as basic unit was researched,and the ontology trust model was built.Based on the ontology's self credibility,the Bayesian network-based ontology concept credibility model and the ontology mapping-based semantic information credibility model were built|based on the ontology's global credibility,the recommendation-based ontology overall recommendation credibility model and the ontology's environment credibility model were constructed.The cases were given to verify the effectiveness and advance of proposed model.

Key words: credibility, knowledge, ontology, oneself credibility, global credibility

摘要： 为了从知识作为语义网络中的重要资源及不确定性推理中对证据知识可信性衡量的需要等角度反映知识可信性研究的重要意义,针对知识可信问题,研究网络环境下面向以本体为基本粒度单位的知识资源的可信评价理论体系,建立了本体可信模型。模型围绕本体自身可信,构建了基于贝叶斯网络的本体自身概念可信子模型和基于本体映射的本体自身语义信息可信子模型;围绕本体全局可信,构建了基于推荐的本体全局推荐可信子模型和本体所处环境可信子模型。给出了基于本体可信模型进行不确定性推理的案例及分析,验证了所提模型及理论的可用性和先进性。

关键词: 可信, 知识, 本体, 自身可信, 全局可信