共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
利用修正的简单方程法对变系数李方程组进行求解,给出了变系数李方程组的双曲函数形式的行波解,当参数取特殊值时,便可以得到该方程组的精确孤波解. 相似文献
3.
主要研究一类耦合的Benjamin-Bona-Mahony型方程组的显式行波解.应用(G′/G)-展开法,Jacobi椭圆函数展开法以及详细的计算,得到了方程组的多个精确行波解.所得结果推广了方程组的sechξ型孤立波解的存在性结果. 相似文献
4.
5.
6.
7.
《数学的实践与认识》2013,(15)
主要利用Galaktionov提出的符号不变量的方法来研究非线性反应扩散方程组的精确解,首先引入Hamilton-Jacobi算子作为方程组的符号不变量,通过对称约化找到方程组容许的超定方程组系统并对其求解,进而得到了允许符号不变量的方程组的具体形式、约束条件和其变量分离解,最后给出某些例子. 相似文献
8.
一变系数非线性发展方程组的自-BT及其精确解 总被引:1,自引:0,他引:1
利用齐次平衡原则,导出了一变系数非线性发展方程组的自-Baecklund变换(自-BT);借助此自-BT和变系数热传导方程的各种精确解用代数的方法获得了方程组的各种精确解。 相似文献
9.
10.
长水波近似方程组的新精确解 总被引:3,自引:0,他引:3
依据齐次平衡法的思想 ,首先提出了求非线性发展方程精确解的新思路 ,这种方法通过改变待定函数的次序 ,优势是使求解的复杂计算得到简化 .应用本文的思路 ,可得到某些非线性偏微分方程的新解 .其次我们给出了长水波近似方程组的一些新精确解 ,其中包括椭圆周期解 ,我们推广了有关长波近似方程的已有结果 . 相似文献
11.
Yu. A. Chirkunov S. Yu. Dobrokhotov S. B. Medvedev D. S. Minenkov 《Theoretical and Mathematical Physics》2014,178(3):278-298
We establish an equivalence of two systems of equations of one-dimensional shallow water models describing the propagation of surface waves over even and sloping bottoms. For each of these systems, we obtain formulas for the general form of their nondegenerate solutions, which are expressible in terms of solutions of the Darboux equation. The invariant solutions of the Darboux equation that we find are simplest representatives of its essentially different exact solutions (those not related by invertible point transformations). They depend on 21 arbitrary real constants; after “proliferation” formulas derived by methods of group theory analysis are applied, they generate a 27-parameter family of essentially different exact solutions. Subsequently using the derived infinitesimal “proliferation” formulas for the solutions in this family generates a denumerable set of exact solutions, whose linear span constitutes an infinite-dimensional vector space of solutions of the Darboux equation. This vector space of solutions of the Darboux equation and the general formulas for nondegenerate solutions of systems of shallow water equations with even and sloping bottoms give an infinite set of their solutions. The “proliferation” formulas for these systems determine their additional nondegenerate solutions. We also find all degenerate solutions of these systems and thus construct a database of an infinite set of exact solutions of systems of equations of the one-dimensional nonlinear shallow water model with even and sloping bottoms. 相似文献
12.
13.
获得了广义的Zakharov方程和Ginzburg-Landau方程的一些精确行波解,这些行波解有什么样的动力学行为,它们怎样依赖系统的参数?该文将利用动力系统方法回答这些问题,给出了两个方程的6个行波解的精确参数表达式. 相似文献
14.
张平 《数学的实践与认识》2009,39(7)
应用改进的Fan's代数方法,得到了KK方程和改进的Boussinesq方程的一系列新精确解,包括孤立波解、类孤立波解、纽结波解、奇异纽结波解和三角函数周期解. 相似文献
15.
In this paper we investigate the exact traveling wave solutions of the fifth-order Kaup-Kuperschmidt equation. The bifurcation and exact solutions of a general first-order nonlinear equation are investigated firstly. With the help of Maple and by using the bifurcation and exact solutions of two derived subequations, we obtain two families of solitary wave solutions and two families of periodic wave solutions of the KK equation. The relationship of the two subequations and the two known rst integrals are analyzed. 相似文献
16.
Solitary Wave Solutions to the ZKBBM Equation and the KPBBM Equation Via the Modified Simple Equation Method
下载免费PDF全文
![点击此处可从《偏微分方程(英文版)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
J. Akter & M. Ali Akbar 《偏微分方程(英文版)》2016,29(2):143-160
In this article, the modified simple equation method (MSE) is used to acquire exact solutions to nonlinear evolution equations (NLEEs) namely the Zakharov- Kuznetsov Benjamin-Bona-Mahony equation and the Kadomtsov-Petviashvilli Benjamin- Bona-Mahony equation which have widespread usage in modern science. The MSE method is ascending and useful mathematical tool for constructing exact traveling wave solutions to NLEEs in the field of science and engineering. By means of this method we attained some significant solutions with free parameters and for special values of these parameters, we found some soliton solutions derived from the exact solutions. The solutions obtained in this article have been shown graphically and also discussed physically. 相似文献
17.
18.
二维RLW方程和二维SRLW方程的显式精确解 总被引:2,自引:0,他引:2
本文讨论了二维RLW方程和二维SRLW方程孤立波解的性态,通过直接积分的方法求出了这两个方程的显式精确孤立波解,并通过选取初始条件的方法求出了二维RLW方程和二维SRLW方程的另一类精确行波解. 相似文献
19.
Geometric Properties and Exact Travelling Wave
Solutions for the Generalized Burger-Fisher
Equation and the Sharma-Tasso-Olver Equation
下载免费PDF全文
![点击此处可从《Journal of Nonlinear Modeling and Analysis》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Jibin Li 《Journal of Nonlinear Modeling and Analysis》2019,1(1):1-10
In this paper, we study the dynamical behavior and exact parametric representations of the traveling wave solutions for the generalized Burger-Fisher equation and the Sharma-Tasso-Olver equation under different parametric conditions, the exact monotonic and non-monotonic kink wave solutions, two-peak solitary wave solutions, periodic wave solutions, as well as unbounded traveling wave solutions are obtained. 相似文献
20.
Asai Asaithambi 《Applied mathematics and computation》2010,216(9):2700-2708
We compute the solution of the one-dimensional Burgers’ equation by marching the solution in time using a Taylor series expansion. Our approach does not require symbolic manipulation and does not involve the solution of a system of linear or non-linear algebraic equations. Instead, we use recursive formulas obtained from the differential equation to calculate exact values of the derivatives needed in the Taylor series. We illustrate the effectiveness of our method by solving four test problems with known exact solutions. The numerical solutions we obtain are in excellent agreement with the exact solutions, while being superior to other previously reported numerical solutions. 相似文献