Chapter three introduces the nonequilibrium Green function method and its applications in mesoscopic transport, and the widely-employed Keldysh equation of motion with a current formula are induced.
第三章介绍了非平衡格林函数方法及其在介观输运中的应用，推导了广泛应用的运动方程以及电流公式。
The jerky motion of electric current may be described by three-order Lagrange equation.
三阶拉格朗日方程可以用来描述电流猝变运动。
In this paper, according to the current track equation of motion system, some typical motion system track has been analyzed.
针对运动系统的一般轨迹方程，分析了几种典型的运动系统轨迹。
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