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One new theorem for Caputo fractional derivative and two new theorems for Caputo fractional order systems, when 1 a 2, are proposed in this paper. The results have proved to be useful in order to apply the fractional-order extension of Lyapunov direct method, to demonstrate the instability and the stability of many fractional order systems,which can be nonlinear and time varying. 相似文献
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In ordinary differential equations, structural stability of hyperbolic fixed points is a classical result, but the proof of this result in [2] has same small mistake. In this paper,we will correct the above mistake by using the Hartman theorem and its idea. 相似文献
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应用Riccati展开法和复变换获得非线性分数阶Sharma-Tasso-Olever方程和时空分数阶耦合Burgers方程的精确解,这些解包括三角函数解和双曲函数解.因此,我们介绍这种方法对于研究非线性分数阶偏微分方程具有十分重要的意义. 相似文献
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本文研究空间分数阶偏微分方程非标准有限差分方法数值解的相关问题.采用Grünwald-Letnikov公式和平移Grünwald-Letnikov公式分别对两个空间分数阶导数进行离散.再运用带有时间和空间步长的分母函数构造非标准有限差分方法.进而利用von Neumann分析方法对差分格式的稳定性和收敛性进行研究,获得了一些新的结果.数值例子验证了非标准有限差分方法用于求解空间分数阶偏微分方程的有效性. 相似文献
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《数学季刊》2017,(3)
In the current paper, based on fractional complex transformation, the GG2-expansion method which is used to solve differential equations of integer order is developed for finding exact solutions of nonlinear fractional differential equations with Jumarie's modified Riemann-Liouville derivative. And then, time-fractional Burgers equation and space-fractional coupled Konopelchenko-Dubrovsky equations are provided to show that this method is effective in solving nonlinear fractional differential equations. 相似文献
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《应用数学与计算数学学报》2017,(3)
周期解的存在性是分数阶动力系统领域中的一个热门话题.分数阶导数不同于经典的整数阶倒数,它们之间的基本区别在于是否存在遗传特性,即分数阶导数是具有弱奇异核的非局部算子,而整数阶导数则为局部算子.简要概述了带分数阶导数(如Grunwald-Letnikov导数、Reimann-Liouville导数、Caputo导数)的分数阶微分方程是否存在周期性解的近期结果.周期函数的经典整数阶导数与该周期函数具有相同周期这一结果已被证明.然而,周期函数的分数阶导数却不是具有相同的周期的周期函数.与此同时,本文也对非常数周期函数分数阶动力系统的周期不存在性以及分数阶动力系统的长时解的周期存在性进行了回顾. 相似文献
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In this paper, we consider a class of nonlinear fractional differential equation boundary value problem. The existence of monotone positive solution is derived by the iterative technique. 相似文献
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本文研究了分数阶微分方程(1.1)解的延拓问题.利用解的表达式给出方程解的可延拓条件,在此基础上研究了解可以延拓至何种程度的有关结果,且探讨了解的存在区间为[to,+∞)的条件. 相似文献
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《数学季刊》2014,(4)
In this paper, we investigate the nonlinear fractional difference equation with nonlocal fractional boundary conditions. We derive the Green's function for this problem and show that it satisfies certain properties. Some existence results are obtained by means of nonlinear alternative of Leray-Schauder type theorem and Krasnosel-skii's fixed point theorem. 相似文献
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非线性分数阶微分方程的奇摄动 总被引:1,自引:0,他引:1
研究了—类奇摄动非线性分数阶微分方程Cauchy问题.在适当的条件下,首先求出了原问题的外部解,然后利用伸长变量、合成展开法和幂级数展开理论构造出解的初始层项,并由此得到解的形式渐近展开式.最后利用微分不等式理论,讨论了问题解的渐近性态,得到了原问题解的一致有效的渐近估计式. 相似文献
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