本文针对智能监控系统的功能和特点,并根据软件开发中数据库设计的理论,给出了智能监控系统的数据库的概念设计、逻辑结构设计,最后实现了数据库的建立。本文数据库使用SQL Server 2005为数据库开发环境,采用Client/Server开发模式。本...本文针对智能监控系统的功能和特点,并根据软件开发中数据库设计的理论,给出了智能监控系统的数据库的概念设计、逻辑结构设计,最后实现了数据库的建立。本文数据库使用SQL Server 2005为数据库开发环境,采用Client/Server开发模式。本系统可以为管理员设置不同级别的权限,实现分级管理。实现实时存储录像文件和报警图片,管理员可以根据图片和录像文件的类型、时间、设备名称和设备位置等信息,来查询所需的图片和录像,方便监控人员查询和确认报警事件。经实际中使用证明,本文所设计的数据库简洁、结构合理、稳定性好、性能高。展开更多
This paper describes some details and procedural steps in the equivalent resistance （E-R） method for simplifying the pier group of the Sutong Bridge, which is located on the tidal reach of the lower Yangtze River, i...This paper describes some details and procedural steps in the equivalent resistance （E-R） method for simplifying the pier group of the Sutong Bridge, which is located on the tidal reach of the lower Yangtze River, in Jiangsu Province. Using a two-dimensional tidal current numerical model, three different models were established： the non-bridge pier model, original bridge pier model, and simplified bridge pier model. The difference in hydrodynamic parameters, including water level, velocity, and diversion ratio, as well as time efficiency between these three models is discussed in detail. The results show that simplifying the pier group using the E-R method influences the water level and velocity near the piers, but has no influence on the diversion ratio of each cross-section of the Xuliujing reach located in the lower Yangtze River. Furthermore, the simplified bridge pier model takes half the calculation time that the original bridge pier model needs. Thus, it is concluded that the E-R method can be use to simplify bridge piers in tidal river section modeling reasonably and efficiently.展开更多
文摘本文针对智能监控系统的功能和特点,并根据软件开发中数据库设计的理论,给出了智能监控系统的数据库的概念设计、逻辑结构设计,最后实现了数据库的建立。本文数据库使用SQL Server 2005为数据库开发环境,采用Client/Server开发模式。本系统可以为管理员设置不同级别的权限,实现分级管理。实现实时存储录像文件和报警图片,管理员可以根据图片和录像文件的类型、时间、设备名称和设备位置等信息,来查询所需的图片和录像,方便监控人员查询和确认报警事件。经实际中使用证明,本文所设计的数据库简洁、结构合理、稳定性好、性能高。
基金supported by the Innovation Project of Graduate Education in Jiangsu Province during 2011 (Grant No. CXZZ11_0449)the Research Plan Project of Transportation Science in Jiangsu Province (Grant No. 20100714-30HDKY001-2)
文摘This paper describes some details and procedural steps in the equivalent resistance （E-R） method for simplifying the pier group of the Sutong Bridge, which is located on the tidal reach of the lower Yangtze River, in Jiangsu Province. Using a two-dimensional tidal current numerical model, three different models were established： the non-bridge pier model, original bridge pier model, and simplified bridge pier model. The difference in hydrodynamic parameters, including water level, velocity, and diversion ratio, as well as time efficiency between these three models is discussed in detail. The results show that simplifying the pier group using the E-R method influences the water level and velocity near the piers, but has no influence on the diversion ratio of each cross-section of the Xuliujing reach located in the lower Yangtze River. Furthermore, the simplified bridge pier model takes half the calculation time that the original bridge pier model needs. Thus, it is concluded that the E-R method can be use to simplify bridge piers in tidal river section modeling reasonably and efficiently.
