一种用于Web服务选择的QoS可信性评估方法

A Method of QoS Trustworthiness Evaluation for Web Services Selection

改进了一种基于服务质量(quality of service,QoS)可信性的Web服务选择方法.根据质量属性的类别,在第二类质量属性中引入惩罚因子和时间参数,不仅加快此类属性评估向真实值收敛的速度,而且还对发布虚假属性值的服务提供者进行了惩罚;在第三类质量属性中引入服务价格参数,降低了服务请求者遭遇团队欺骗的风险.结果表明改进后的方法能有效地提高QoS评估的可信性.

The quality of service based on the trustworthiness of the Web service selection was improved.Based on the type of quality attributes,penalty factor and time parameter were introduced in the second quality attribute evaluation.They not only accelerated the type of quality attribute evaluation convergencing to the true value,but also punished the provider who released the false property values.Service price parameter was introduced in the third quality attribute evaluation.It reduced the risk that the service requestor encounters by team fraud.The results showed that the improved method effectively increased the trustworthiness of QoS evaluation.