摘要
把信任概念和信任度引入到服务组合中来,讨论了信任感知的服务组合选择问题,分别基于两种观点建立了其数学模型.并基于观点1,深入地研究了服务组合的动态选择问题,分别采用蚁群系统作为优化工具设计了两种动态选择方法:方法1针对服务在上限阈值的范围内提供优质服务,服务质量保持不变,超过阈值则拒绝服务的情况;方法2针对服务无限制地接受请求,但随着请求数量的增多,其服务质量下降的情况.通过对方法1和方法2的仿真实验结果分析表明,两种方法具有很好的效果.
Trust concept and Trust Degree are introduced into service composition and trustaware service selection problem in service composition is discussed. The mathematic models based on two opinions are established. Based on opinion 1, the dynamic selection problem of service composition is researched deeply. Two dynamic selection methods are designed based on ant colo- ny system： method 1 is under the environment of service providing perfect service without excee- ding threshold and rejecting service with exceeding threshold; method 2 is under the environment of service＇s QoS descending when the invoke number increase. The tow methods have good effect through experiments and experiment results analysis.
出处
《计算机学报》
EI
CSCD
北大核心
2009年第8期1668-1675,共8页
Chinese Journal of Computers
基金
国家"九七三"重点基础研究发展规划项目基金(2007CB311100)
国家自然科学基金重大项目(60496322/60496327)
北京工业大学博士科研启动基金(52007013200704)
北京工业大学青年基金(97002011200702/X1007011200801)资助~~
