运用解析几何中的坐标变换和投影，得出一种有效求解位置反解的新方法，通过MATLAB软件对该方法进行了仿真和验证。

It put forward an effective new method to resolve the inverse position by using the conversion of coordinates and projection in analytic geometry, the method was simulated and verified by MATLAB.

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钻井模拟器通过将培训者的操作结果投影到大屏幕上以仿真现场操作，因此对系统的实时性要求较高。

The drilling simulator projects the image of the trainer's operation to a big screen to simulate on-site operations, so the real-time of the system is to be highly required.

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方法：利用曲线拟合方法模拟大脑外形曲线，借助有限元方法和等位线反投影算法完成脑eit仿真成像。

A curve of a real brain shape is simulated with the curve-fitting methods and EIT in the brain is finished with finite-element methods and Equipotential Lines Back-Projection algorithm.

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