基于QoS的主动地理信息服务模型及其算法研究

Research on Active Geography Information Service Model and Algorithm Based on QoS

论述了面向服务架构下的主动地理信息服务模型,由于主动型的地理信息服务在用户发现、定制和运行方面都能够满足用户的需求服务,从而改变了当前用户只能被动地使用现有服务的应用模式,以应对信息化需求的不断发展和变化。并将模型中的关键技术地理信息服务发现与组合的算法问题规划为离散、有限的数据结构上的最优化问题。在分析服务质量(QoS)属性的基础上,提出基于自动修正判断矩阵的QoS最优选择算法,旨在得到一个解决地理信息服务组合选择的近似最优解决方案,以达到快速选择最优服务的目的。实验结果表明,该方法能有效提高主动地理信息服务的执行效率。

This paper studied the active geography information service model upon on Service -Oriented Architecture , and provided the service for user to discover , customize and run · This would support the designing according to need of the new services and new applications .And would change the model that the current users use only the existing services passively and satisfy the incessant muta -tive need of information war .This paper studied programming the geographical information services composition as the optimization problem upon on the discrete and limited data structure .On the basis of QoS, an AHP approach with automatically modifying judgment matrix was proposed to estimate the quality of service , so the best service could be selected quickly .The experimental results show that this strategy increases running efficiency of the active geography information service request .