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模糊Petri网及其在Web服务信任评估中的应用李 季 朱小勇


摘 要:为了提高 Web服务的信任评估准确度和交互成功率,提出了一种新的基于模糊Petri网的Web服务信任评估模型(WS-TEM)。该模型给出了评估的模糊信任规则,在此基础上,提出了一种基于模糊Petri网的推理算法,并使用模糊Petri网中知识表示和运行的基本算法,并行处理一个服务实体的多个推荐信任来综合评估Web服务实体间的信任关系。经过模拟实验和分析表明,该模型在Web服务信任评估上更加准确可靠,从而降低了交互的风险,保证了交互的成功率。
  关键词:信任评估模型; 信任度更新算法; 模糊Petri网; 模糊推理算法
  中图分类号:TP393
  文献标志码:A
  
  文章编号:1001-3695(2010)02-0573-04
  doi:10.3969/j.issn.1001-3695.2010.02.047
  
  Fuzzy Petri net and its application in Web services trust evaluation
  
  LI Ji, ZHU Xiao-yong
  
  (School of Computer, Chongqing University, Chongqing 400044, China)
  
  Abstract:In order to improve the accuracy of trust evaluation and the success rate of interaction of Web services,this paper proposed a new Web services trust evaluation model WS-TEM based on the fuzzy Petri net. This model gave the fuzzy trust rules of evaluation, based on it, proposed a reasoning algorithm based on the fuzzy Petri net. This model used the knowledge of fuzzy Petri net to represent and run basic algorithm which applied to comprehensive evaluation trust relation of Web services entities by parallel processing of more than one recommended trust. The result of simulative experiment and analysis show that this model on the trust evaluation of Web services becomes more accurate and reliable, consequently the interaction risk is reduced and ensured the success rate of interaction. ......
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