一种综合考虑主客观权重的Web服务QoS度量算法  

Web Service Quality Metric Algorithm Employing Objective and Subjective Weight

作　　者：马友[1] 王尚广[1] 孙其博[1] 杨放春[1] 

机构地区：[1]网络与交换技术国家重点实验室(北京邮电大学),北京100876

出　　处：《软件学报》2014年第11期2473-2485,共13页Journal of Software

基　　金：国家自然科学基金(61202435);北京市自然科学基金(4132048);教育部高等学校博士学科点专项科研基金(20110005130001)

摘　　要：已有的Web服务Qo S(quality of service)度量方法由于无法对用户偏好的模糊性予以准确量化,以及对候选服务Qo S属性数据分布特征的忽视,导致其度量结果不准确.为此,提出了一种综合考虑主客观权重的Web服务Qo S度量算法.该算法利用自适应用户偏好的主观权重计算方法和服务潜能保障的客观权重计算方法,从主观和客观两个角度进行Qo S度量,以保障度量结果在符合用户偏好的基础上能够准确地反映服务的整体性能.理论分析和基于QWS真实数据集的实验结果表明,所提出的方法能够准确地获得Web服务Qo S的度量结果.The existing methods for measuring Web service QoS （quality of service） are not accurate as they cannot precisely quantify the ambiguity of user preference while neglecting the characteristics of QoS data set. This paper presents a QoS measuring algorithm which employs subjective and objective weight. The new approach can automatically adapt to user preference with a subjective weight calculation method, and can evaluate service performance accurately with an objective weight calculation method. The algorithm takes a comprehensive consideration of both subjective and objective aspects to measure Web service QoS, therefore the measure results can conform to user preference and reflect the overall service performance accurately. The theoretical analysis and experimental results based on the QWS real data set show that the proposed algorithm can measure Web service QoS accurately.

关 键 词：WEB服务 QOS 主观权重 客观权重 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]