基于三角模糊数的Web服务QoS量化算法

Web Services Selection Algorithm Based on Triangular Fuzzy Number

在Web服务中用实数形式给出的Qo S属性缺乏灵活性和精确性,但使用语言型数据表示的Qo S属性无法用于计算,为了使语言型数据可以用于计算多属性群决策问题,提出了一种基于联系数的三角模糊数的Web服务选择算法。该算法基于多个用户对Web服务的语言型评价进行服务选择,同时将三角模糊数转化为联系数并建立联系数决策模型,给出了决策步骤,基于此对Web服务的安全等级进行了排序。该算法结合了联系数和三角模糊数的特点,具有客观性。通过实验证明,该算法相比其他Web服务选择算法,具有计算简便的特点,且服务选择的结果也更符合用户的意愿。

In the process o f Web service selec t io n, the language - based d a ta, easily used to describe users＇real requirements, are hardly quantized. To solve this p ro b lem , a Web service selection algorithm based on triangular fuzzy number is proposed in this paper. The a lg o r ithm , based on service selection of Web service language type evaluation by users, converts the tria n g u la r fuzzy number to connection numbers, establishes the connection numbers decision m o d e l, provides the decision - making steps and orders the Web services security le v e l, w h ich is more objective because i t combines the charac-teristics of connection numbers and tr ia n g u la r fuzzy number. The experimental results show that i t is simpler and the service selection results conform to the u s e r ’ s real wishes than other Web services selection algorithm .