The gestures of real palm that obtained by position tracker are mapped to the gestures of virtual palm in the virtual reality environment by data mapping and transfer matrixes.

通过位置跟踪器获取操作者手掌的位姿数据，采用数据分解和矩阵变换的方法将其映射为虚拟手掌在虚拟现实环境中的位姿，实现了对虚拟手的准确控制。

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Usually, a GPS tracker transmits its position using a radio or mobile-phone connection.

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Or buy the tracker and then fan out with stock picks, breaking bits off the ETF position to get actual, single stock exposure.

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"Their relative position versus Nvidia has improved compared to six months ago, " says Dean McCarron, president of chip tracker Mercury Research.

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