The solution of the nonlinear wave equation describing propagation of a femtosecond laser pulse with duration of several optical oscillation periods in a nonlinear fiber is presented.

给出了描述具有几个光振荡周期的飞秒激光脉冲在非线性光纤中传输方程的解。

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Under the appropriate conditions, the asymptotic solution and its existence conditions are obtained, the results for a class of quasi-circular membrane oscillation problem is extended.

在适当的条件下，得出了这类问题的渐近解及其可解性条件，推广了一类近乎圆膜的振动问题所得的结果。

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In this paper the boundary value problem for a neutral hyperbolic differential equation is studied. A new method for judgement of oscillation solution is obtained and is spreded known results.

研究了一类中立型双曲型泛函微分方程边值问题，得到了判定解是振动的新的方法，推广了已有的结果。

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