Secondly, Aiming at classical mathematics model of Multi-machine System, state equation and transient energy function are putted forward in the center of angle.

针对多机系统的经典数学模型，给出多机系统在角度中心下的状态空间方程及其暂态能量函数。

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We analyzed the geometric property of edge curve of formed milling cutter, deduced the curve's mathematics equation, got the center coordinate of disc blade, and designed the edge curve by CAD.

通过分析铣刀刀刃曲线的几何性质，推导出它的数学方程，进而求取刀片中心位置坐标，完成刀刃曲线的计算机辅助设计。

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This paper analyses the two body problem of kinematical equation and discusses the elastic collision between two particles in the center of mass system.

用质心坐标系分析了二体问题的运动方程，并用质心系讨论了两个粒子间的弹性碰撞问题。

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The new collaboration revolution in education technology places people squarely at the center of the equation, making it easier to connect and produce solid results.

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With the rise of App stores and cloud centric software, these smart devices are quickly becoming a secondary part of the equation and the Apps themselves are taking center stage.

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