基于评估函数的全局中介器动态选举技术  

Global Mediator Election Technology Based on Evaluation Function

作　　者：韩建民[1] 刘冬梅[1] 虞慧群[1] 

机构地区：[1]华东理工大学计算机科学与工程系

出　　处：《华东理工大学学报（自然科学版）》2008年第4期553-557,588,共6页Journal of East China University of Science and Technology

基　　金：上海市浦江人才计划(05PJ14030);上海市曙光计划(07SG32);国家自然科学基金(60473055,60773094)

摘　　要：针对集成系统中集中式中介器效率低、可靠性差等问题,建立了一个多中介器协作的3层结构信息集成框架MMIA。提出了基于评估函数的中介器选举算法GMEA,该算法根据当前中介器的运行状态和中介器本身的能力,动态地选举出最优的全局中介器。全局中介器与其他中介器协作,完成查询请求。实例说明基于评估函数的全局中介器的选举技术可以有效地提高集成系统的查询效率。To solve the problem of central mediator architecture in efficiency and reliability, this paper establishes a three layered information integration architecture. A global mediator election algorithm （GMEA） is proposed, which can elect a mediator as a global mediator dynamically according to mediators＇ current status and capabilities. With collaboration of global mediator and other mediators, a query is pro cessed. Experimental data show that the global mediator election technology based on evaluation function can improve efficiency of query processing in information integration systems.

关 键 词：信息集成 中介器 包装器 查询优化 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]