【摘要】 为了对语义匹配产生的Web服务集进行二次选择,提出了一种带QoS约束的语义Web服务选择方法.该方法首先扩展了OWL-S模型中的QoS描述信息,提出了具有服务语义与服务质量描述能力的可扩展的OWL-SQ服务描述模型,以此作为服务质量支持与约束,然后基于决策理论和归一化算法,给出了针对OWL-SQ模型中各种非数值型和数值型质量属性的无量纲化处理方法,提出了QoS匹配矩阵构建算法及服务选择方法,以综合评价与选择最优侯选服务,通过实例测试其性能,结果表明基于OWL-SQ服务描述模型的服务选择方法,提高了服务选择的效率与查准率.更多还原

【Abstract】 To select the proper one from the web service candidate set provided by semantic matching,a method for web service selection with QoS(quality of service) constraints is proposed.First,this method extends the QoS description information in OWL-S(Web Ontology Language for Services) model,and the extensible OWL-SQ model for service description with service semantic and QoS description is presented, and it is QoS supporting and constraining.Then the unitary processing method without measurement units for QoS properties with un-numerical value type and numerical value type in OWL-SQ model based on decision theory and normalized algorithm.Finally,the algorithm for constructing matching matrix of QoS and the method of service selection are presented,to integration evaluating and selecting optimization candidate web service. Test result makes know that the efficiency and accuracy of service selection are improved with the service selection method based on OWL-SQ model by instance test.更多还原