面向气象水文信息整合的网格模型

数据的高效获取.存储,传输和处理对气象水文信息系统至关重要,然而,管理这些存储在地理分布,异构数据源中的海量数据也是一个重大挑战.其难点在于如何处理数据源之间结构和语义异构性,如何提高分布式查询的效率、如何保证数据源中数据的安全性和查询的正确性.针对这些问题,提出了一种基于网格技术的气象水文信息整合模型.在模型中,存储管理器、查询管理器,事务管理器等组件之间交互协作以提供各种数据管理服务和保障.同时提出的类JDBC的资源统一访问接口模型,不仅可以实现异构数据库信息的整合,也可以实现异构数据库信息和特定格式的水文信息的统一整合.详细描述了各组件的功能作用和模型的工作机制.

Grid-based information integration model for weather and hydrology application

Efficient data retrieving,storing,transferring and processing is critical in the information system of weather forecasting and hydrological application.However,data management of these geographical distributed and heterogeneous data sources is challenging.The issues of resolving structural and semantic heterogeneities,enhance the efficiency of distributed query,ensure the security of the data stored in data sources and the accuracy of the query result,are difficult.A hydrometeorology information integration model for weather forecasting and hydrological application is proposed based on grid technology,in which,a suite of services and guarantee are provided by the interactive cooperation of the components like storage manager,query manager,transaction manager and so on,at the same time,a JDBC-like unified resource access model is proposed for integrating information which stored in heterogeneous databases as well as information of weather and hydrology which stored with specified format.The detailed functionalities of the components and the mechanisms are described.