• 论文 •    

随机服务质量感知的Web服务信誉度量模型

付晓东,岳昆,邹平,姜瑛,   

  1. 1.昆明理工大学 云南省计算机技术应用重点实验室,云南昆明650500;2.昆明理工大学 信息工程与自动化学院,云南昆明650500;3.云南大学 信息学院,云南昆明650091;4.昆明理工大学 管理与经济学院,云南昆明650093
  • 出版日期:2011-08-15 发布日期:2011-08-25

Stochastic QoS-aware reputation measurement model of Web services

FU Xiao-dong, YUE Kun, ZOU Ping, JIANG Ying   

  1. 1.Yunnan Provincial Key Lab of Computer Technology Application, Kunming University of Science and Technology, Kunming 650500, China;2.Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650051, China;3.School of Information Science and Engineering, Yunnan University, Kunming 650091, China; 4.Faculty of Management and Economics, Kunming University of Science and Technology, Kunming 650093, China
  • Online:2011-08-15 Published:2011-08-25

摘要: 为了根据公告服务质量随机性和实际服务质量随机性之间的一致性来计算服务质量的信誉,首先利用分布函数表示服务质量随机性,并给出一种服务质量经验分布函数的增量式更新方法。通过将服务质量公告值和实际观察值视为随机变量,并以随机优势理论为基础,设计结合随机服务质量公告及实际观察值的信誉度量模型。模型考虑了公告服务质量随机性和实际服务质量随机性之间不同的优势关系,以及服务质量观察值波动对信誉的影响。理论分析与实验验证了模型的合理性及其在服务选择中应用的有效性。

关键词: Web服务, 服务质量, 随机性, 信誉, 一致性, 随机优势

Abstract: To measure the Quality of Service (QoS) reputation based on the consistency between advertised QoS randomness and actual QoS randomness, distribution function was used to represent the stochastic nature of QoS and an incremental update method of empirical distribution function was designed firstly. Based on the stochastic dominance theory, a reputation measurement model combined with advertised QoS and actual QoS was proposed by modeling advertised QoS and actual QoS as random variables. The different dominance relationship between advertised QoS and actual QoS with the influence on reputation by QoS observation wave were considered. Theoretical analysis and experiments showed that the proposed model was feasible and effective in service selection.

Key words: Web service, quality of service, stochastic nature, reputation, consistency, stochastic dominance

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