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。
2
The Angle subtended at the center of a sphere by an area on its surface numerically equal to the square of the radius.
在单位半径的球体中心对球表面上的投影面积所张的角。
3
Under the roof we put the half cylinder inclined at the same angle and above the center of the cylinder, the top light is set where the time can be told through the position of the line.