计算机工程与应用2017，Vol.53Issue(14)：70-75,6.DOI:10.3778/j.issn.1002-8331.1602-0047
随机QoS感知的Web服务组合概率分析
Probabilistic analysis for stochastic QoS of Web service composition
摘要
Abstract
Open and dynamic network environments lead to the stochastic nature of Web service QoS(Quality of Service). Therefore, the Web service compositions which composed of these services will be inevitably random of the QoS. And the QoS requirements of Web service composition may not be certainly satisfied. In this paper, it analyzes the probabilistic distribution of the stochastic QoS of Web service composition based on a simulation approach named importance sam-pling in stochastic PERT network. And it calculates the unbiased estimation of the target distribution function through a weighted function to a simple distribution function. Experiment has been done to show that the importance sampling approach is much more rational and efficient than Monte Carlo simulation based on the actual QoS data of Web services.关键词
Web服务/Web服务组合/服务质量(QoS)/仿真/随机PERT/概率分布/重要性采样Key words
Web service/Web service composition/Quality of Service(QoS)/simulation/stochastic PERT/probability distribution/importance sampling分类
信息技术与安全科学引用本文复制引用
汪潇洒,付晓东,刘骊,岳昆,刘利军..随机QoS感知的Web服务组合概率分析[J].计算机工程与应用,2017,53(14):70-75,6.基金项目
国家自然科学基金(No.71161015 ,No.61462056 ,No.61462051 ,No.61472345) （No.71161015 ,No.61462056 ,No.61462051 ,No.61472345）
云南省应用基础研究计划项目(No.2014FA028,No.2014FA023,No.2014FB133). （No.2014FA028,No.2014FA023,No.2014FB133）
