New positioning techniques are needed. To implement a GPS-free and fixed-grids-independent three-dimensional positioning system is challenging in multi-hop wireless networks.
实现不依赖GPS和固定网络设施的三维定位，是多跳移动自组网络中具有挑战性的新课题。
Objective: Measuring the secure depths and angles of Yamen acupoint with three-dimensional positioning MRI to provide the reference datas of secure depths and angles for clinic.
目的：通过使用三维定位MRI测量哑门穴进针的安全深度、角度，为临床提供安全针刺深度和角度的参考数据防止意外事故发生。
Objective: To approach the feasibility of the three-dimensional positioning and navigation with regular catheter electrodes in intracavitary with a low-frequency electrical field.
目的：探讨基于低频电场方式进行心腔内三维定位导航及心内膜重构的可行性。
The system uses the triangle survey principle to realize three dimensional positioning and uses the rich lookup table structure of FPGA to complete the algorithm.
该系统采用三角形测量原理实现三维精确定位，利用FPGA丰富的查找表结构完成算法。
The system uses the triangle survey principle to realize three dimensional positioning and uses the rich lookup table structure of FPGA to complete the algorithm.
该系统采用三角形测量原理实现三维精确定位，利用FPGA丰富的查找表结构完成算法。
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