In this paper, how to transfer WGS-84 coordinate system into Beijing 1954 geodetic system or state 1980 geodetic system, and build up information managing system of active faults by GIS.
本文介绍如何求解系统转换参数，将WGS-84坐标转换为我国目前使用的是1954年北京坐标系或1980年国家大地坐标系。进而可以利用GIS技术建立活断层信息管理数据库系统。
A simple control method of voltage source shunt active power filters is proposed in the synchronous rotating reference orthogonal coordinate system.
提出了在同步旋转坐标系下的电压源型有源电力滤波器简单控制方法。
The points are measured in the coordinate system of the active model.
这些点以当前模型的坐标系来测量。
The points are measured in the coordinate system of the active model.
这些点以当前模型的坐标系来测量。
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