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mKdV方程和mKP方程组的新的精确孤立波解 总被引:2,自引:0,他引:2
用三角函数假设法和一种新辅助方程的解构造mK dV方程和mKP方程组的精确孤立波解.这种方法也可用于寻找其它非线性发展方程的新的孤立波解. 相似文献
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In this paper,some new periodic solutions of nonlinear evolution equations and corresponding travelling wave solutions are obtained by using the double function method and Jacobi elliptic functions. 相似文献
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首先介绍了Davey-Stewartson方程、Darboux算子和Lax对的概念,然后利用Darboux变换结合Lax对的方法对Davey-Stewartson方程求解,得到了DSII方程新的周期孤立波解,DSI方程新的双周期解. 相似文献
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mKdV方程的多孤子解很难直接验证,本文通过证明GLM反散射变换方程导出的Jost解满足两个相容性方程的方法,解决了这个问题. 相似文献
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mKdV方程的对称与群不变解 总被引:1,自引:0,他引:1
主要考虑mKdV方程的一些简单对称及其构成的李代数,并利用对称约化的方法将mKdV方程化为常微分方程,从而得到该方程的群不变解,这是对该方程群不变解的进一步扩展. 相似文献
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我们给出了一种统一的Jacobi椭圆函数方法来构造非线性偏微分方程精确行波解的新方法.借助于Mathematica,我们获得了五阶变系数模型方程的24种Jacobi椭圆函数解. 相似文献
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In this paper, we study the Logistic type equation x= a(t)x -b(t)x^2+ e(t). Under the assumptions that e(t) is small enough and a(t), b(t) are contained in some positive intervals, we prove that this equation has a positive bounded solution which is stable. Moreover, this solution is a periodic solution if a(t), b(t) and e(t) are periodic functions, and this solution is an almost periodic solution if a(t), b(t) and e(t) are almost periodic functions. 相似文献
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该文讨论了具有分段Caputo导数和周期脉冲的分数阶发展方程,建立了具有周期脉冲的相关线性发展方程周期mild解的存在性和唯一性.借助线性脉冲周期问题解算子的表达式,利用算子半群理论和不动点定理,证明了半线性脉冲周期问题周期mild解的一些新的存在性结果. 相似文献
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1 Introduction and Mds ResultsMathematical modeling of physical systems Often leads to nonlinear evolution equations.EXat solutions of such equations axe of haPortance in physical problexns, and in Particu1arthere is considerable interest in solitary wave solutiOns and soliton solutions. In this paPer, wepresent tlie solitary wave and sOliton sOlutions Of a fiftli order nonlillear evolution eqllation.Suppose u(x, t) satisfies fOllowing nonlinear 5th-order evolutiOn equation Of the fOrmut… 相似文献
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In this paper, we consider a certain fourth-order nonlinear ordinary differential equation. Some sufficient conditions which guarantee the existence of at least one ω-periodic solution to the system are obtain. 相似文献
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本文研究了Fisher方程和Burgers-Fisher方程.运用一种辅助微分方程方法,得到了这两种非线性偏微分方程新的精确行波解. 相似文献
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本文研究了共振长短波方程的孤波解.利用扩展映射法和符号计算,得到许多新的孤波解.这些孤波解能很好地模拟水波,辅助方程用更一般方程代替的扩展映射法能更有效找到这些孤波解.Abstract: In this article,soliton solutions of the long-short wave resonance equations are investigated.By the extended mapping method and symbolic computation,many new exact soliton solutions are obtained.These soliton solutions are fascinating in modeling water waves.The extended mapping method,with the auxiliary ordinary equations replaced by more general ones,is more effective to find these soliton solutions. 相似文献
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本文研究了奇异半线性椭圆问题.利用上下解方法,获得了该问题解的一个存在性和不存在性结果. 相似文献
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EXACT SOLUTIONS OF (2+1)-DIMENSIONAL NONLINEAR SCHRöDINGER EQUATION BASED ON MODIFIED EXTENDED TANH METHOD 下载免费PDF全文
In this paper, the modified extended tanh method is used to construct more general exact solutions of a(2+1)-dimensional nonlinear Schr¨odinger equation.With the aid of Maple and Matlab software, we obtain exact explicit kink wave solutions, peakon wave solutions, periodic wave solutions and their 3D images. 相似文献