动态数据库参数 dynamic data bass parameter
- 油气井经仪器直接测量后,就可以创立该井全储层原始流体性质全参数数据库及地层动态特性全参数数据库。
If a well is measured by the tools mentioned above, then all formation fluid parameters and all dynamic characteristics of the whole reservoir can be obtained. - 该软件通过自定义的通信协议与造气炉下位机之间进行实时通信,利用主界面模拟现场运行环境,动态显示造气炉各类运行参数;同时,通过建立外部SQL数据库,实现实时数据与历史数据的长久保存;另外,该软件设计有内嵌OPC服务器接口,成功地解决了本系统与其它设备系统之间的通信难题。
This software communicates real-timely with the slave computers of the coal gasification reactors using user-defined corresponding protocol, while its main interface simulates running environment of the scene, displays various parameters gathered from the coal gasification reactors; at the same time the software stores data to exterior SQL database, so as to realize the long keep of the real-time data and the historical data; in addition, there is OPC server interface embedded in the software, so this software successfully solves the difficult problem of different systems communication. - 摘要介绍了空间数据库中最近邻居查询的基本概念和算法,并详细说明了时间参数查询和基于位置的最近邻居查询,列出了它们的适用范围,同时也指出了这两种最近邻居查询算法对动态环境的不适用性。
Basic concepts and algorithms of nearest neighbors query in spatial database are introduced, existing time-parameterized (TP) query and location-based nearest neighbors query and the applicable range are explained, at the same time, their inapplicability in dynamic environment are pointed out.