一种基于QoS偏好的服务选择策略

面对服务质量敏感的用户，应该依据用户的偏好进行服务选择。给出了Web服务QoS的描述形式，从5个方面对QoS属性进行分析。根据用户对各QoS指标的偏好构建层次分析法(analytic hierarchy process，AHP)矩阵，进一步利用AHP矩阵获得各QoS属性的权重。在此基础上，提出了一种基于逼近理想解的排序方法(technique for order preference by similarity to an ideal solution，TOPSIS)。该方法基于候选服务的QoS属性构建决策矩阵，确定正理想解和负理想解，通过贴近度的大小对服务进行优劣排序。实例分析表明，该算法是有效的。

Web services selection strategy based on QoS preference

Because it is important to choose the web service for sensitive users of quality of service based on their preferences, we first analyze the five QoS attributes, and then propose a QoS preference processing model based on AHP matrix. We propose a kind of multi-attribute decision making model based on technique for order preference by similarity to an ideal solution (TOPSIS), which uses the candidate web services's QoS to build a decision matrix, then sorts the candidate web services by close degree of size. Example analysis shows that the model is effective.