三个非等谱方程的类孤子解

n-soliton-like solutions of three non-isospectral equations, the non-isospectral mKdV equation, the non-isospectral sine-Gordon equation and the non-isospeetral nonlinear Schroedinger equation were obtained by using the Hirota method.     

KdV方程的新Wronskian解

The novel Wronskian solutions of the KdV equation were obtained as limits of the soliton solutions in the Wronskian form. These solutions were verified by direct substitution to satisfy the bilinear derivative form of the KdV equadon and its Backlund transformation.     

某些孤子方程的新解

The novel multisoliton solutions for the nonlinear lumped self-dual network equations, Toda lattice and KP equation were obtained by using the Hirota direct method.     

Exact solutions for the mixed AKNS equation： Hirota approach

The mixed AKNS nonlinear evolution equation in equation, which contains an isospectral term the AKNS system. So searching for its exact and a nonisospectral term, is an important solutions is vital both for the AKNS system and in mathematical sense. In this paper, the corresponding Lax pair was given, the bilinear forms of the mixed AKNS equation were obtained through introducing the transformation of dependent variables. By using Hirota＇s bilinear method, the N-soliton solutions were obtained.     

微分差分KdV方程新的类多孤子解

This article is concerned with the Hirota direct method for studying novel multisoliton solutions of the discrete KdV equation.First the Hirota method was introduced,then the novel multisoliton solutions were obtained.Simultaneously the figures of the novel one-soliton solution and two-solton solution were given and the singularity of the novel multisoliton solutions was discussed.Finally it was pointed out that the multisoliton solutions with sigularity can be called soliton-like solutions.     

A Family of Exact Solutions fort the Nonlinear Schrodinger Equation

In this paper,the nonlinear Schrodinger(NLS)equation was analytically solved.Firstly,the stationary solutions of NLS equation were explicitly given by the elliptic functions.Then a family of exact solutions of NLS equation were botained from these stationary solutions by a method for finding new exact solutions from the stationary solutions of integrable evolution equations.     

混合型AKNS方程的精确解: Hirota方法

The mixed AKNS equation, which contains an isospectral term and a nonisospectral term, is an important nonlinear evolution equation in the AKNS system. So searching for its exact solutions is vital both for the AKNS system and in mathematical sense. In this paper, the corresponding Lax pair was given, the bilinear forms of the mixed AKNS equation were obtained through introducing the transformation of dependent variables. By using Hirota's bilinear method, the N-soliton solutions were obtained.     

5阶KdV方程的一类新多孤子解

Using bilinear transformation method,a new N-soliton solutions were obtained for the Sawada-Kotera equation.     

Novel Solutions of MKdV Equation with the Modified Baecklund Transformation

AA modified version of the bilinear Baecklund transformation for the MKdV equation was given, with which some new solutions of the MKdV equation are obtained. The approach used here is general and can be applied to other soliton equations.     

Kuramoto-Sivashinsky 方程中定常解分歧到旋转波解的一个注记

In this paper, we consider the detection and calculation of bifurcation from nontrivial steady-state solutions to ro~ wave solutions of the Kttramoto-Sivashinsky（K-S） equation by using the nonlinear Galerkin method. Numerical results show the efficiency and advantages of the nonlinear Galerkin method over the conventional Galerkin method in this application.     

广义PC方程的孤立波解

为了进一步研究Pochha mmer-Chree方程孤立波解的特性,考虑了Pochhammer-Chree方程广义形式的孤立波解的存在性．运用双曲函数法和指数函数法求出广义Pochhammer-Chree方程的孤立波解,并给出此方程多个新的显式精确孤立波解,表明广义Pochhammer-Chree方程的孤立波解是存在的,也说明双曲函数法和指数函数法是求方程孤立波解的有效工具．     

求非线性薛定谔方程的行波解的一种新途径

利用形变映射法,建立NLS方程与Klein-Gordon（NKG）非线性方程的一类特殊类型解的代数变换关系,根据NKG方程的已知解,获得NLS方程系统丰富的显式精确行波解,包括孤波解,周期波解,雅可比椭圆函数解.     

形变映射法求Boussinesq方程的显式精确行波解

利用形变映射法，建立Boussinesq方程与三次非线性Klein-Gordon(NKG)方程一类特殊类型解的代数变换关系．根据该关系以及NKG方程的已知解，获得Boussinesq方程系统丰富的显式精确行波解，包括孤波解，周期波解，雅可比椭圆函数解和其他精确解．     

一类非线性中立型双曲微分方程的振动性

研究一类具有连续分布滞量的非线性中立型双曲方程解的振动性质.利用Jensen不等式和直接分析方法,获得了一类具连续分布滞量的非线性中立型双曲微分方程所有解振动的若干充分条件.     

简化的Hirota方法及其应用

1　Introduction　SeekingtheexactsolutionsofthenonlinearPDEs(partialdifferentialequations) playsanimportantroleintreatingnonlinearproblems ,andmany powerfulmethodshavebeenproposedanddeveloped .Duetotheavailabilityofcomputeralgebraicsystems,moreattentionispaidtosimpleanddirectmethodswhichallowonetoconstructexplicitspecificsolutionsforPDEs,forexample ,themixingexponentialmethod ,thetruncatedPainlev啨ｅｘｐａｎｓｉｏｎ ,thehomogeneousbalancemethod ,thehyperbolicfunctionmethodandgeometricmethods[…     

形变映射法构造非线性Boussinesq方程的行波解

利用变形映射法 ,建立Boussinesq方程与三次非线性Klein -Gordon(NKG)方程一类特殊类型解的代数变换关系。根据该关系以及NKG方程的已知解 ,获得Boussinesq方程系统丰富的显式精确行波解 ,包括孤波解、周期波解、雅可比椭圆函数解和其他精确解     

EXP-函数法的应用及Zakharov方程的新精确解

在辅助方程法的基础上,利用EXP-函数展开法求出了辅助方程—Riccati方程具体的指数函数形式解,从而利用Riccati方程的解求出了Zakharov方程大量新的精确解,同时可以得到简单的双曲函数解和三角函数解.这种方法也可用于寻找其它非线性发展方程的新的精确解.