一种关联感知的组合服务重选取方法  

Composite Service Reselection Method of Correlation-Aware

作　　者：张岳松[1] 张斌[1] 张长胜[1] 张明卫[2] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819 [2]东北大学软件学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2015年第4期469-473,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(61100090);中央高校基本科研业务费专项资金资助项目(N110604002;N120604003;N120804001);沈阳市科技计划项目(F12-277-1-80)

摘　　要：已有的组合服务重选取方法大都假定任务之间互相独立,然而在实际场景中,由于基本服务间存在着Qo S关联关系,使得某些任务之间也存在着关联关系,从而导致这些已有的方法难以获取最佳的调整方案.针对该问题,通过扩展OWL-S,给出了一个支持服务间关联关系的Qo S模型.基于该模型,给出了一个支持任务间关联关系的重选取算法,该算法将具有关联关系的任务作为一个任务单元,以关联服务作为任务单元的备选服务进行重选取.实验结果表明,与按照任务间独立的方式进行重选取相比,该方法能有效提高重新选取出的组合服务质量.Most of the existing researches for composite service reselection method are based on the assumption that the tasks involved are independent. However,in practical scenarios,the Qo S of some candidate services have correlations with other services,which leads to the reselected results not to be the optimal one in the real executing environment for these existing reselection methods. To solve this problem,a Qo S model supporting the correlations between services was given by extending the OWL-S framework. Based on the proposed model,a composite service reselection method considering the correlations among tasks was provided,in which the correlated tasks were regarded as a task unit and the correlated services of each task unit were regarded as its candidate service set.Experimental results showed that compared with the reselection methods considering the tasks independent,the proposed approach could effectively improve the quality of composite service reselected.

关 键 词：重选取 Qo S 关联关系 OWL-S 组合服务 

分 类 号：TP311.5[自动化与计算机技术—计算机软件与理论]