Taking medium as a system of nonlinear oscillator,applying the perturbation method of Liouville equation and the perturbation method of stationary state,in this paper,it obtains the change of density matrix induced by crossing of high velocity electron,which provide the basis for calculating the interrelated thermodynamical quantities further.
将介质视为非线性振子系统 ,应用对刘维方程的微扰展开方法和定态微扰方法 ,得到了有快速电子穿过系统导致的密度矩阵的改变 ,为进一步计算相关热力学量提供了基础 。
· METHODS: Ninety-six eyes of 48 cases were given Augentropfen Stulln Mono eye-drops to treat VDT asthenopia, and the adverse reaction was observed.
目的:观察施图伦滴眼液治疗VDT视疲劳的临床效果。