一种QoS感知的语义Web服务组合群决策算法

摘要

针对QoS信息不确定和存在多个决策者的语义Web服务组合问题,基于多属性群决策理论给出了一个自治的语义Web服务组合群决策算法(AGSC).该算法能够对以实数型、区间型和语言型数据描述的复杂的QoS信息进行综合评估,从而为多客户提供正确、高效的决策支持,为其优选出最佳的组合服务执行计划.利用真实Web服务的质量对该算法进行了实验验证,结果表明该算法具有优秀的决策灵敏性和稳定性,并能有效地反映决策群中个体角色的变化.%For solving the difficulties of uncertain QoS and multiple decision makers involved in the semantic Web service composition, this paper presents an autonomous group decision making algorithm for semantic Web service composition (AGSC), which is based on the multi-attribute group decision making (MAGDM) theory. This algorithm can synthetically evaluate the complex QoS information expressed by real numbers, intervals and linguistic types, and then make fair and efficient decisions on the optimal execution plan for multiple customers. At last, this algorithm was validated by real data based experiments. The results show that it has the outstanding sensitivity and stability of decisions and can accurately reflect the roles changing in the decision group.