He investigates geometrical properties of cycloids, epicycloids, and hypocycloids . 他研究了摆线、圆外旋轮线和四点圆的旋轮线的几何性质。
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By taking advantage of computer technology the main parts of the reducer - epicycloid groove , hypocycloid groove , steel ball and output mechanism are shown and emulated . the motion of the drive is also demonstrated . the paper mainly concludes the following works : at first , the meshing efficiency of the drive is studied and analyzed in theory according to the constituted construction and the drive principles 在对其传动原理及结构进行分析的基础上，对该传动的啮合效率进行了深入研究，并针对该传动的整体尺寸进行了参数模糊可靠性优化，进而利用计算机技术，对该传动的主要零件? ?内、外摆线盘和等速输出机构进行了三维建模仿真，演示了该传动的运动情况。
