为保障用户特定的QoS需求,需要有效地表示和计算用户的需求偏好信息,为此提出了一种QoS偏好的序关系向量表示和计算方法。该方法首先把用户对QoS属性的偏好次序,转化为序关系向量表示,然后运用优化模型计算出QoS属性的权重向量,最后利用QoS权重向量来确定候选服务的优先顺序,从而保证了用户特定的QoS需求。该方法能把用户QoS偏好信息转化为可量化计算的形式,具体实例结果表明了该方法的有效性。
To guarantee user specific QoS requirements, it is necessary to represent and calculate the user QoS preference information.A method of ordering vector representation and calculation for QoS preference is put forward.This method firstly transformed QoS attributes order sequence to the form of order vector.Afterwards, the optimization model is applied to calculate the weights of QoS attribute vector.Finally, the QoS vector is utilized to determine the optimal candidancy services.The method could transfer the user QoS preference information to the quantification computation form, and a concrete example confirms its validity.