In the case of plane motion, the phase plane method can be used to analyse the motion qualitatively.

对于平面运动的特殊情形，可在相平面内进行定性分析。

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A tether length rate control algorithm has been described in this paper, based on a dynamics study by state plane method.

本文采用状态平面方法研究动力学，并开发了柔线速率控制算法。

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The stability of the helical equilibrium is analyzed with phase plane method, and an analytical criterion of stability is revealed.

用相平面法分析螺旋线平衡的稳定性，导出解析形式的稳定性条件。

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The theoretical part of the seminar on the measurement technology including the principle of a measurement survey, a plane-table method, a perpendicular survey, a traverse survey, a GPS survey, and using a total station will be conducted at the premises of the Institute of Fine Arts.

UNESCO: 7-8 November 2012, Tashkent, Uzbekistan