针对异构数据描述的QoS信息和群体中个性化的用户Qos偏好的Web服务组合问题,提出了一种基于多属性决策(MADM)理论的面向群体用户的语义web服务选择算法(GUWSSA),GUWSSA能够获得群体Pareto最优服务组合计划。首先定义了能够描述群组的用户上下文本体和支持异构数据类型的服务上下文本体,然后给出了GUWSSA的详细细节,包括异构决策矩阵的规格化、综合评价、获得群体Pareto最优方案,最后通过一系列实验验证了该算法的性能和有效性。实验数据表明,在用户QoS偏好不同和Qos数据类型异构的情况下,GUWSSA能够选出群体Pareto最优的服务组合计划。
For solving the difficulties in group-oriented Web composition service due to heterogeneous QoS values and personalized QoS preferences, this paper presents a semantic Web service selection algorithm for groups (GUWSSA) based on themulti-attribute decision making (MADM) theory, which can get a Pareto optimal composition plan for groups. The paper gives the definitions of the user context ontology that can describe groups and the service context ontology that supportsheterogeneous QoS values and then describes the detail of the GUWSSA, including normalizing the heterogeneous decision-making matrix, evaluating alternatives synthetically, and obtaining the Pareto optimal solution for groups. The exper-imental results show that the GUWSSA can select a Pareto optimal composition plan for groups when users have different QoS preferences in groups and the expression types of QoS are heterogeneous.