Exact Traveling Wave Solutions of the Generalized Fractional Differential mBBM Equation

By using the fractional complex transform and the bifurcation theory to the generalized fractional differential mBBM equation, we first transform this fractional equation into a plane dynamic system, and then find its equilibrium points and first integral. Based on this, the phase portraits of the corresponding plane dynamic system are given. According to the phase diagram characteristics of the dynamic system, the periodic solution corresponds to the limit cycle or periodic closed orbit. Therefore, according to the phase portraits and the properties of elliptic functions, we obtain exact explicit parametric expressions of smooth periodic wave solutions. This method can also be applied to other fractional equations.

Equation governing the probability density evolution of multi-dimensional linear fractional differential systems subject to Gaussian white noise

Stochastic fractional differential systems are important and useful in the mathematics,physics,and engineering fields.However,the determination of their probabilistic responses is difficult due to their non-Markovian property.The recently developed globally-evolving-based generalized density evolution equation(GE-GDEE),which is a unified partial differential equation(PDE)governing the transient probability density function(PDF)of a generic path-continuous process,including non-Markovian ones,provides a feasible tool to solve this problem.In the paper,the GE-GDEE for multi-dimensional linear fractional differential systems subject to Gaussian white noise is established.In particular,it is proved that in the GE-GDEE corresponding to the state-quantities of interest,the intrinsic drift coefficient is a time-varying linear function,and can be analytically determined.In this sense,an alternative low-dimensional equivalent linear integer-order differential system with exact closed-form coefficients for the original highdimensional linear fractional differential system can be constructed such that their transient PDFs are identical.Specifically,for a multi-dimensional linear fractional differential system,if only one or two quantities are of interest,GE-GDEE is only in one or two dimensions,and the surrogate system would be a one-or two-dimensional linear integer-order system.Several examples are studied to assess the merit of the proposed method.Though presently the closed-form intrinsic drift coefficient is only available for linear stochastic fractional differential systems,the findings in the present paper provide a remarkable demonstration on the existence and eligibility of GE-GDEE for the case that the original high-dimensional system itself is non-Markovian,and provide insights for the physical-mechanism-informed determination of intrinsic drift and diffusion coefficients of GE-GDEE of more generic complex nonlinear systems.

EXISTENCE AND STABILITY RESULTS FOR GENERALIZED FRACTIONAL DIFFERENTIAL EQUATIONS

In this paper,a sufficient conditions to guarantee the existence and stability of solutions for generalized nonlinear fractional differential equations of orderα(1<α<2)are given.The main results are obtained by using Krasnoselskii's fixed point theorem in a weighted Banach space.Two examples are given to demonstrate the validity of the proposed results.

Particular Solutions of Generalized Linear Second Differential Equations by Fractional Calculus

本文依据Ｋ．Ｎｉｓｈｉｍｕｔｏ教授于１９７９年所定义的分数微积分定义Ｌｅｍｍａｓ为基础，给出一种线性阶微分方程及偏微分方程（包括均匀及非均匀）的方法，使其更一般化，概括范围更宽、更广．

DISCRETE GALERKIN METHOD FOR FRACTIONAL INTEGRO-DIFFERENTIAL EQUATIONS

In this article, we develop a fully Discrete Galerkin（DG） method for solving ini- tial value fractional integro-differential equations（FIDEs）. We consider Generalized Jacobi polynomials（CJPs） with indexes corresponding to the number of homogeneous initial conditions as natural basis functions for the approximate solution. The fractional derivatives are used in the Caputo sense. The numerical solvability of algebraic system obtained from implementation of proposed method for a special case of FIDEs is investigated. We also provide a suitable convergence analysis to approximate solutions under a more general regularity assumption on the exact solution. Numerical results are presented to demonstrate the effectiveness of the proposed method.

New generalized fuzzy transform computations for solving fractional partial differential equations arising in oceanography

This paper presents a study of nonlinear waves in shallow water.The Korteweg-de Vries(KdV)equa-tion has a canonical version based on oceanography theory,the shallow water waves in the oceans,and the internal ion-acoustic waves in plasma.Indeed,the main goal of this investigation is to employ a semi-analytical method based on the homotopy perturbation transform method(HPTM)to obtain the numerical findings of nonlinear dispersive and fifth order KdV models for investigating the behaviour of magneto-acoustic waves in plasma via fuzziness.This approach is connected with the fuzzy generalized integral transform and HPTM.Besides that,two novel results for fuzzy generalized integral transforma-tion concerning fuzzy partial gH-derivatives are presented.Several illustrative examples are illustrated to show the effectiveness and supremacy of the proposed method.Furthermore,2D and 3D simulations de-pict the comparison analysis between two fractional derivative operators(Caputo and Atangana-Baleanu fractional derivative operators in the Caputo sense)under generalized gH-differentiability.The projected method(GHPTM)demonstrates a diverse spectrum of applications for dealing with nonlinear wave equa-tions in scientific domains.The current work,as a novel use of GHPTM,demonstrates some key differ-ences from existing similar methods.

含类分数阶Hukuhara导数集值积分微分方程的稳定性

讨论了一类特殊的集值积分微分方程的稳定性.通过类Lyapunov函数和比较原理,得到了一类特殊的方程解的等度稳定性、一致稳定性、等度渐近稳定性和严格稳定性准则.

具有状态依赖时滞的Caputo分数阶中立型泛函微分方程的柯西问题

具有状态依赖时滞的泛函微分方程是微分系统的重要内容。文章研究具有状态依赖时滞的Caputo分数阶中立型泛函微分方程的柯西问题。先利用Schaefer不动点定理及Gronwall不等式技巧得到该方程解的存在性,然后利用广义Winston单调时滞条件和反证法得到该方程解的唯一性结论,推广已有的结果。

状态依赖时滞Caputo分数阶泛函微分方程的可解性

考虑状态依赖时滞Caputo分数阶泛函微分方程解的存在唯一性。首先利用Schaefer不动点定理及Gronwall不等式得到方程解的存在性;然后利用适用于分数阶微积分的广义Winston单调滞后条件得到解的唯一性,推广了已有的结果。

Solution of the time-fractional generalized Burger-Fisher equation using the fractional re duce d differential transform method

“The time-fractional generalized Burger-Fisher equation(TF-GBFE)”is used in various applied sciences and physical applications,including simulation of gas dynamics,financial mathematics,fluid mechan-ics,and ocean engineering.This equation represents a concept for the coordination of reaction systems,as well as advection,and conveys the understanding of dissipation.The Fractional Reduced Differential Transform Method(FRDTM)is used to evaluate“the time-fractional generalized Burger-Fisher equation(TF-GBFE).”Todeterminethemethod’s validity,whenthesolutionsareobtained,theyarecorrelatedto exact solutions ofα=1 order,and even for various values ofα.Three-dimensional graphs are used to depict the solutions.Additionally,the analysis of exact and FRDTM solutions indicates that the proposed approach is very accurate.

具有Caputo导数的分数阶微分方程比较定理的推广

考虑到现有的分数阶微分方程比较定理中的阶数α的取值范围是(0,1),此条件限制了它的适用范围。因此将具有Caputo导数的分数阶微分方程比较定理中的阶数α的取值范围推广到(n-1,n),n∈Z+,从而得到具有Caputo导数的分数阶微分方程解自身大小的比较定理。

基于结构元的模糊值Caputo分数阶微分方程

利用广义模糊微分,讨论了基于结构元的模糊值Caputo分数阶微分的性质,研究了模糊值Caputo分数阶微分和模糊值Riemann-Liouville分数阶积分之间的关系,最后讨论了常系数一阶线性模糊值Caputo分数阶微分方程解的结构。

具p(t)-Laplacian算子的Caputo型分数阶脉冲微分方程广义反周期边值问题解的存在性

讨论一类具p(t)-Laplacian算子的Caputo型分数阶脉冲微分方程广义反周期边值问题,运用Krasnosel’skiis不动点定理及Banach压缩映像原理给出了解存在且唯一的充分条件,并通过实例加以验证.

CAUCHY PROBLEM FOR FRACTIONAL BEAM-LIKE EQUATIONS

In one space-and in one time -dimension a beam-like equation is solved, where the second time derivative is replaced by the α- fractional time derivative, 1 〈 α ≤ 2. The solution is given in closed form in terms of the Mttag-Leffler functions in two parameters.

分数阶超混沌系统的线性广义同步观测器设计

首先利用分数阶的常微分动力系统的稳定性理论,通过判断线性化后平衡点的稳定不变特性、辅助以分岔图分析等数值手段,给出了新近提出的改进型超混沌L櫣系统对应分数阶系统产生混沌现象的阶次参数范围;进一步,设计了一类广义线性同步观测器,该观测器的动力学行为能与原系统实现任意的线性关系的广义同步,而经典的完全同步、反相同步以及投影同步可以视为本文提出方法的特例.最后的数值仿真进一步证实了本文提出的观测器设计方案的有效性.

一类分数阶微分方程的广义拟线性化方法

采用广义拟线性方法讨论了Caputo分数阶微分方程初值问题,给出2个单调迭代序列,证明它们一致且平方收敛于方程的解.

一类脉冲分数阶微分方程广义反周期边值问题解的存在性（英文）

本文研究一类脉冲分数阶微分方程广义反周期边值问题解的存在性,利用不动点理论得到一些解的存在性结论,推广和补充了已有的一些结论.此外给出一个实例说明论文的主要结果的可行性.

基于广义Oldroyd-B流体问题的高维多项时间分数阶偏微分方程的解析解

提出两类高维多项时间分数阶偏微分方程的模型,此模型可用来描述广义黏弹性Oldroyd-B流体的剪应力和剪切速率之间的非线性关系.采用分离变量法将此分数阶偏微分方程转化成分数阶常微分方程,从而得到此高维多项时间分数阶偏微分方程的解析解,解的形式以多重Mittag-Leffler函数的形式给出.

分式微分方程的积分因子存在定理

证明了型如(dy)/(dx)=(a1x+b1y+c1)/(a2x+b2y+c2)的一阶分式微分方程的积分因子的存在性,并给出其积分因子,从而得到分式微分方程的通解.

由分数噪声驱动的一类分数阶随机偏微分方程的光滑密度研究（英文）

本文中,我们研究了由分数噪声驱动的一类分数阶随机偏微分方程,利用Malliavin分析技巧,证明了该类方程的适度解在任意固定的点(t,x)∈[0,T]×R具有光滑密度.