Toward the end of world war ii , reports economist dr . eli ginzberg , large numbers of wives entered the labor force “第二次世界大战快结束的时候” ，经济学家艾力?金兹贝博士说： “大批妇女进人劳动大军。
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From the analytical point of view , with the aid of the numerical simulation , we investigate the propagation properties of optical pulses for the nonlinear schrodinger equation in picosecond regime , the higher - order nonlinear schrodinger equation in femtosecond regime , the nonlinear schrodinger equation with varying gain / loss and frequency chirping in homogeneous optical fibers , and ginzberg - landau equation that describes ultrashort pulses in the presence of self - frequency shift , respectively 本文从解析的角度出发，同时借助各种微扰理论和数值分析方法，分别研究描述皮秒光脉冲传输的非线性薛定谔方程、飞秒光脉冲传输的高阶非线性薛定谔方程、非均匀光纤中光脉冲传输的含有频率啁啾和增益损耗项的非线性薛定谔方程以及描述超短光脉冲传输的ginzberg - landau方程的解的特性，为进一步实现超高速、大容量的光信息传输提供一定的理论依据。
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( 4 ) finally , the ginzberg - landau equation is considered . by the ansatz method , the chirped femtosecond solitonlike solution is given , and the stability of the solutions are studied in detail by linear stability analysis with variation method . also the long - distance stability of the ultrashort pulse and the interaction between the solutions are also discussed by numerical method ( 4 )讨论描述超短光脉冲传输的高阶ginzberg - landau方程，给出该方程的啁啾类孤波解，并利用变分法解析地讨论啁啾类孤波解的线性稳定性，同时研究这种类孤波解的长距离稳定性和相互作用。
