摘要
QoS在语用Web服务提供过程中担负着重要的角色。该文提出了一种语用Web服务质量评价模型,在满足服务的功能需求同时,满足其QoS要求;给出了模型的基本定义,并采用QoS评价树的方法描述QoS评价属性之间的关系。为了反映不同属性在QoS评价中所占的比重,对QoS评价属性引入权重概念,给出一种基于信息熵的样本统计计算权重值的算法。
Quality of Service (QoS) acts as an important role in the providing services procedure of pragmatic Web. It is becoming a hot direction to find out the favorite service for users. This paper proposes a model for evaluating the quality of pragmatic Web service. In the model, not only functional requirements but also QoS constraints of composition service can be satisfied. And based on the detail QoS model definition, the QoS evaluation tree is used to reveal the relation between QoS attributes. The weightiness of QoS attribute is introduced in order to handle the varied importance of attributes. An algorithm through samples statistic based on information entropy for getting weight value is presented also.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2007年第S3期1477-1480,1484,共5页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金(60673170)
