Based on a case study of the Watt linkage, the bifurcation equation with Angle variables has been established in complex number field.
以瓦特六杆机构为例，在复数域内建立了以角度为变量的复数形式机构分叉分析方程。
In this paper, we attempt to discuss the conditions of closed orbit in more general -cases on the basis of the method of action-angle variables in analytical mechanics.
本文试图采用分析力学中作用角变量的方法，对一般情形下的轨道闭合条件进行讨论。
On the basis of the method of action-angle variables the conditions of closed orbits under the action of general power-type gravitation potential are discussed on this paper.
本文采用作用角变量的方法，讨论了闭合轨道在一般幂次型引力势作用下的情况。
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