一种在用户偏好不确定情况下的Web服务选择方法

Approach to Web services selection under uncertain user preferences

首先由用户对各个QoS属性的偏好给出语言描述及其不确定度;然后通过查找对照表将其换算成各个QoS属性的权重系数;最后使用QoS属性值和权重系数进行候选服务的综合评价,得到最接近满足用户不确定偏好的候选服务。模拟实验结果证明了该方法的有效性。

Therefore, the linguistic descriptions and their uncertainty of individual QoS attributes were given by the user at first, and then was to lookup the reference table to convert those into weight factors of the various QoS attributes, the last step was to use the values and weight factor of QoS attribute to evaluate the candidate services comprehensively to get the one which was closest to meets the uncertain user preferences. The results of simulation experiment show the effectiveness of the approach.