动态Web服务合成中的服务选择算法研究  

Research on service selection algorithm for dynamic web services composition

作　　者：李娜[1] 冯百明[1] 武小龙[1] 

机构地区：[1]西北师范大学数学与信息科学学院,甘肃兰州730070

出　　处：《计算机工程与设计》2011年第2期413-415,618,共4页Computer Engineering and Design

基　　金：甘肃省科技攻关计划基金项目(2GS047-A52-002-04)

摘　　要：为了提高服务合成效率并更好的适应动态变化的应用环境,提出了基于流程修改的服务合成方案,使得复合服务的执行与服务发现过程并行化。提出了基于QoS属性的服务选择算法,该算法能够实现服务执行时选择服务,在考虑综合QoS信息及时间因素的基础上,通过不断更新用户需求来进行服务选择,提高了服务合成效率。实验结果表明,该选择算法可以获得满足用户需求且最优的服务,很好的保证了服务的可靠执行。To improve the efficiency of web services composition and adapt to the dynamic application environment, the scheme for composing web services based on process modification is put forward, which makes the composite service execution and service discovery parallel. And the service selection algorithm based on the QoS attributes is proposed, which can select service while executing the services. Considering the global QoS information and the time factor, it improves the efficiency of web services composition by updating the user＇ s needs continuously while selecting service. Its validity and practicality is verified with instance and it shows that the selection algorithm can acquire the best service that meet user＇ s needs and ensure reliable implementation of the services.

关 键 词：WEB服务 动态服务合成 服务质量 服务选择 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]