共查询到17条相似文献,搜索用时 156 毫秒
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用分离变量法研究了新(2+1)维非线性演化方程的相干孤子结构.由于Bcklund变换和变量分离步骤中引入了作为种子解的任意函数,得到了新(2+1)维非线性演化方程丰富的孤子解.合适地选择任意函数,孤子解可以是solitoffs,dromions,dromion格子,呼吸子和瞬子.呼吸子不仅在幅度、形状,各峰间距离,甚至在峰的数目上都进行了呼吸.
关键词:
新(2+1)维非线性演化方程
分离变量法
孤子结构 相似文献
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借助Mathematica符号计算软件,利用拓展的F/G展开法和变量分离法,得到(2+1)维耗散长波方程的精确解.通过选择适当的函数,获得(2+1)维耗散长波方程的亮暗dromion解和周期孤波解. 相似文献
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研究(1+1)维广义的浅水波方程的变量分离解和孤子激发模式. 该方程包括两种完全可积(IST可积)的特殊情况,分别为AKNS方程和Hirota-Satsuma方程. 首先把基于Bcklund变换的变量分离(BT-VS)方法推广到该方程,得到了含有低维任意函数的变量分离解. 对于可积的情况,含有一个空间任意函数和一个时间任意函数,而对于不可积的情况,仅含有一个时间任意函数,其空间函数需要满足附加条件. 另外,对于得到的(1+1)维普适公式,选取合适的函数,构造了丰富的孤子激发模式,包括单孤子,正-反孤子,孤子膨胀,类呼吸子,类瞬子等等. 最后,对BT-VS方法作一些讨论.
关键词:
浅水波方程
Bcklund变换
变量分离
孤子 相似文献
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利用分离变量法,研究了(2+1)维非线性薛定谔(NLS)方程的局域结构.由于在B?cklund变换和变量分离步骤中引入了作为种子解的任意函数,得到了NLS方程丰富的局域结构.合适地选择任意函数,局域解可以是dromion,环孤子,呼吸子和瞬子.dromion解不仅可以存在于直线孤子的交叉点上,也可以存在于曲线孤子的最近邻点上.呼吸子在幅度和形状上都进行了呼吸
关键词:
非线性薛定谔方程
分离变量法
孤子结构 相似文献
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By means of a special Painlevé-Bäcklund
transformation and a multilinear variable separation
approach, an exact solution with arbitrary functions of the
(2+1)-dimensional Boiti-Leon-Pempinelli system (BLP) is derived. Based on the derived variable separation solution,
we obtain some special soliton fission and fusion
solutions for the higher dimensional BLP system. 相似文献
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Variable Separation Solution for (1+1)-Dimensional Nonlinear Models Related to Schroedinger Equation
XUChang-Zhi ZHANGJie-Fang 《理论物理通讯》2004,42(4):568-572
A variable separation approach is proposed and successfully extended to the (1 1)-dimensional physics models. The new exact solution of (1 1)-dimensional nonlinear models related to Schr6dinger equation by the entrance of three arbitrary functions is obtained. Some special types of soliton wave solutions such as multi-soliton wave solution,non-stable soliton solution, oscillating soliton solution, and periodic soliton solutions are discussed by selecting the arbitrary functions appropriately. 相似文献
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利用推广的齐次平衡方法,研究了(2+1)维BroerKaup方程的局域相干结构.首先根据领头项分析,给出了这个模型的一个变换,并把它变换成一个线性化的方程,然后由具有两个任意函数的种子解构造出它的一个精确解,发现(2+1)维BroerKaup方程存在相当丰富的局域相干结构.合适的选择这些任意函数,一些特殊型的多dromion解,多lump解,振荡型dromion解,圆锥曲线孤子解,运动和静止呼吸子解和似瞬子解被得到.孤子解不仅可以存在于直线孤子的交叉点上,也可以存在于曲线孤子的交叉点或最临近点上.呼吸子在幅度和形状上都进行了呼吸.本方法直接而简单,可推广应用一大类(2+1)维非线性物理模型.
关键词:
浙江师范大学非线性物理研究室
金华321004 浙江海洋学院物理系
舟山316004 相似文献
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Variable separation solutions and new solitary wave structures to the (1+1)-dimensional equations of long-wave-short-wave resonant interaction 下载免费PDF全文
A variable separation approach is proposed and extended to the (1+1)-dimensional physical system. The variable separation solutions of (1+1)-dimensional equations of long-wave-short-wave resonant interaction are obtained. Some special type of solutions such as soliton solution, non-propagating solitary wave solution, propagating solitary wave solution, oscillating solitary wave solution are found by selecting the arbitrary function appropriately. 相似文献
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ZHENG Chun-Long 《理论物理通讯》2004,41(3):391-396
By means of the standard truncated Painlev\'{e} expansion and a variable
separation approach, a general variable separation solution of the
generalized Burgers system is derived. In addition to the usual
localized coherent soliton excitations like dromions, lumps,
rings, breathers, instantons, oscillating soliton excitations,
peakons, foldons, and previously revealed chaotic and fractal
localized solutions, some new types of excitations --- compacton and
Jacobi periodic wave solutions are obtained by introducing
appropriate lower dimensional piecewise smooth
functions and Jacobi elliptic
functions. 相似文献
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XU Chang-Zhi 《理论物理通讯》2006,46(3):403-406
Variable separation approach is introduced to solve the (2+1)-dimensional KdV equation. A series of variable separation solutions is derived with arbitrary functions in system. We present a new soliton excitation model (24). Based on this excitation, new soliton structures such as the multi-lump soliton and periodic soliton are revealed by selecting the arbitrary function appropriately. 相似文献
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C.-L. Bai H. Zhao 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2006,39(1):93-99
By means of a variable separation approach and an
extended homogeneous balance method, a general variable separation
excitation of a (2+1)-dimensional nonlinear system is derived. Based on the
derived solution with arbitrary functions, we reveal soliton fission and
fusion phenomena in the (2+1)-dimensional soliton system. 相似文献