分布式城市电磁环境数据库系统的设计与实现

The Design and Realize of DDBMS of Electromagnetic Environment of Urban

应用客户端/服务器结构,采用三层模式建立了一套服务于城市电磁环境管理部门的分布式电磁环境数据库系统(DDBMS)。阐述了DDBMS的系统功能、系统的设计与实现及各模块的组成,并着重对分布式查询处理器的实现做了详细地叙述。

Built a distributed database management system （DDBMS） of electromagnetic environment to serve the manage department of urban environment. The system employed a Client/Server structure and a three-layer mode. With emphasis on its functions, design and realization as well as the composing of each section, the article described detailedly the realization of the distributed query module. This system realized the normalization, automatization and network of data management of the urban electromagnetic environment.