[1]赵莉,李蜀瑜.基于DEC_POMDP的Web服务组合优化算法[J].计算机技术与发展,2014,24(03):74-78.
 ZHAO Li,LI Shu-yu.Web Service Composition Optimization Algorithm Based on DEC_POMDP[J].,2014,24(03):74-78.
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基于DEC_POMDP的Web服务组合优化算法()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
24
期数:
2014年03期
页码:
74-78
栏目:
智能、算法、系统工程
出版日期:
2014-03-31

文章信息/Info

Title:
Web Service Composition Optimization Algorithm Based on DEC_POMDP
文章编号:
1673-629X(2014)03-00074-05
作者:
赵莉李蜀瑜
陕西师范大学 计算机科学学院
Author(s):
ZHAO LiLI Shu-yu
关键词:
服务质量DEC_POMDP自组织服务组合Q学习
Keywords:
quality of servicesDEC_POMDPself_organized service compositionQ_learning
分类号:
TP301.6
文献标志码:
A
摘要:
面向服务计算( SOC)和面向服务架构( SOA)技术共同推动了Web服务及其组合技术的发展。网络环境的动态变化及其对Web服务质量( QoS)的影响,给服务成功组合带来挑战,为服务组合效果满足用户需求带来难题。为了得到经济、省时且成功率高的服务组合策略,综合考虑网络环境的动态变化、服务质量的可变性、用户需求的多样性,采用分散的部分可观测马尔可夫决策( DEC_POMDP)模型描述多个服务Agent的自组织服务组合系统,在基本Q学习算法基础上做出改进,求解模型得到组合策略。实验结果表明求解的策略较大地提高了组合服务的成本、时间消耗,且组合成功率较高。采用的DEC_POMDP模型有效地将Web服务组合动态过程描述出来,并自适应地更新了QoS值,采用Q学习算法及时使用了最新的QoS值。
Abstract:
Service-Oriented Computing ( SOC) and Service-Oriented Architecture ( SOA) promoted Web service and its composition of technology development. Changes in the network environment and its impact on Quality of Service ( QoS) ,brought challenge to the suc-cessful combination and problems to the service composition effect to meet customer needs. In order to get economic,time-saving and high success-rate service composition strategy,considering the changes in the network environment,variability of QoS and the diversity of user needs,use DEC_POMDP model to describe the service Agent combination of self-organizing systems,making an improvement based on Q learning algorithm to solve composition of the model. Experimental results show that solving strategy largely improves the services composition cost,time-consuming and the composition success rate is higher. The DEC_POMDP model describes the dynamic process of Web service composition and adaptively updates the QoS values,the use of Q-learning algorithm makes it in a timely manner using the latest QoS values.

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更新日期/Last Update: 1900-01-01