模糊集下QoS感知的网格服务优选算法  

QoS-aware selection algorithm of grid services on fuzzy set

作　　者：王璿[1] 孔令富[1] 

机构地区：[1]燕山大学信息科学与工程学院

出　　处：《计算机应用研究》2008年第7期2007-2009,2012,共4页Application Research of Computers

基　　金：河北省自然科学基金资助项目(F2006000281);河北省科学技术研究发展计划资助项目(062135127)

摘　　要：在面向服务的网格应用中,支持服务质量(QoS)的服务选择成为确保用户QoS需求的有效方法,QoS感知的服务选择以多个QoS参数为评价指标。考虑到服务需求描述中QoS参数的约束条件往往具有模糊性,定义了模糊目标的隶属函数,将服务选择问题转换为模糊集下的多目标规划问题,通过求解QoS参数之间的重要关系来缓解QoS需求间存在的矛盾性问题。最后提出了QoS感知的服务优选算法,对每个候选服务的整体服务质量进行排序,为用户选择合适的服务提供依据。The QoS-aware service selection is an available method to ensure quality of service for users in service-oriented grid application. It adopts several QoS parameters to evaluate the performance of service. During the process of service selection, the restrictive conditions of QoS usually are fuzzy. A subjection function of frizzy targets was defined to solute, this problem, The problem of service selection was translated into the multi-targets programming problem on the fuzzy set. In order to release the contradictory between several QoS parameters, the weight relationship of them were calculated. According to the above pa- rameters, a QoS-aware service selection algorithm was proposed that took response time, cost, service global capability and service credit as performance metrics, and chosen the best service as target.

关 键 词：网格 服务选择 服务质量 模糊集 多目标规划 

分 类 号：TP393.07[自动化与计算机技术—计算机应用技术]