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基于α-expansion的超分辨率图像重建
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作者 张东晓 李翠华 《中国科技论文》 CAS 北大核心 2015年第8期937-941,共5页
为了获得更精确的超分辨率重建结果,在重建高分辨率像素时,剔除对重建贡献微弱甚至没有贡献的低分辨率像素,保留有所贡献的低分辨率像素。对低分辨率像素的贡献进行程度化,获得所有低分辨率像素的加权贡献,并进一步建立超分辨率重建的... 为了获得更精确的超分辨率重建结果,在重建高分辨率像素时,剔除对重建贡献微弱甚至没有贡献的低分辨率像素,保留有所贡献的低分辨率像素。对低分辨率像素的贡献进行程度化,获得所有低分辨率像素的加权贡献,并进一步建立超分辨率重建的极小化能量函数,使用α-expansion算法求解能量函数极小化问题。在求解过程中,保留3个像素间的关系,可避免由能量函数的近似而引入的错误信息。实验结果表明,所提方法是合理、有效的。 展开更多
关键词 图像处理 超分辨率 α-expansion算法 图像重建 程度化
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(G′/G)-Expansion Method for Solving Fractional Partial Differential Equations in the Theory of Mathematical Physics 被引量:17
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作者 郑滨 《Communications in Theoretical Physics》 SCIE CAS CSCD 2012年第11期623-630,共8页
In this paper, the (G′/G)-expansion method is extended to solve fractional partial differential equations in the sense of modified Riemann-Liouville derivative. Based on a nonlinear fractional complex transformation,... In this paper, the (G′/G)-expansion method is extended to solve fractional partial differential equations in the sense of modified Riemann-Liouville derivative. Based on a nonlinear fractional complex transformation, a certain fractional partial differential equation can be turned into another ordinary differential equation of integer order. For illustrating the validity of this method, we apply it to the space-time fractional generalized Hirota-Satsuma coupled KdV equations and the time-fractional fifth-order Sawada-Kotera equation. As a result, some new exact solutions for them are successfully established. 展开更多
关键词 (G'/G)-expansion method fractional partial differential equations exact solutions fractionalcomplex transformation
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A novel (G'/G)-expansion method and its application to the Boussinesq equation 被引量:16
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作者 Md.Nur Alam Md.Ali Akbar Syed Tauseef Mohyud-Din 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第2期34-43,共10页
In this article, a novel (G'/G)-expansion method is proposed to search for the traveling wave solutions of nonlinear evolution equations. We construct abundant traveling wave solutions involving parameters to the B... In this article, a novel (G'/G)-expansion method is proposed to search for the traveling wave solutions of nonlinear evolution equations. We construct abundant traveling wave solutions involving parameters to the Boussinesq equation by means of the suggested method. The performance of the method is reliable and useful, and gives more general exact solutions than the existing methods. The new (G'/G)-expansion method provides not only more general forms of solutions but also cuspon, peakon, soliton, and periodic waves. 展开更多
关键词 (G'/G)-expansion method Boussinesq equation solitary wave solutions auxiliary nonlinear ordinary differential equation
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Abundant Exact Traveling Wave Solutions of Generalized Bretherton Equation via Improved (G′/G)-Expansion Method 被引量:11
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作者 M.Ali Akbar Norhashidah Hj.Mohd.Ali E.M.E.Zayed 《Communications in Theoretical Physics》 SCIE CAS CSCD 2012年第2期173-178,共6页
In this article, we construct abundant exact traveling wave solutions involving free parameters to the generalized Bretherton equation via the improved (G′/G)-expansion method. The traveling wave solutions are presen... In this article, we construct abundant exact traveling wave solutions involving free parameters to the generalized Bretherton equation via the improved (G′/G)-expansion method. The traveling wave solutions are presented in terms of the trigonometric, the hyperbolic, and rational functions. When the parameters take special values, the solitary waves are derived from the traveling waves. 展开更多
关键词 improved (G'/G)-expansion method travelling wave solutions the Bretherton equation nonlinearevolution equations
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The (ω/g)-expansion method and its application to Vakhnenko equation 被引量:9
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作者 李文安 陈浩 张国才 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第2期400-404,共5页
This paper presents a new function expansion method for finding travelling wave solutions of a nonlinear evolution equation and calls it the (w/g)-expansion method, which can be thought of as the generalization of ... This paper presents a new function expansion method for finding travelling wave solutions of a nonlinear evolution equation and calls it the (w/g)-expansion method, which can be thought of as the generalization of (G'/G)-expansion given by Wang et al recently. As an application of this new method, we study the well-known Vakhnenko equation which describes the propagation of high-frequency waves in a relaxing medium. With two new expansions, general types of soliton solutions and periodic solutions for Vakhnenko equation are obtained. 展开更多
关键词 (w/g)-expansion method Vakhnenko equation travelling wave solutions
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Exact solutions of nonlinear fractional differential equations by (G'/G)-expansion method 被引量:6
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作者 Ahmet Bekir zkan Güner 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第11期140-145,共6页
In this paper, we use the fractional complex transform and the (G'/G)-expansion method to study the nonlinear fractional differential equations and find the exact solutions. The fractional complex transform is prop... In this paper, we use the fractional complex transform and the (G'/G)-expansion method to study the nonlinear fractional differential equations and find the exact solutions. The fractional complex transform is proposed to convert a partial fractional differential equation with Jumarie's modified Riemann-Liouville derivative into its ordinary differential equation. It is shown that the considered transform and method are very efficient and powerful in solving wide classes of nonlinear fractional order equations. 展开更多
关键词 (G'/G)-expansion method time-fractional Burgers equation fractional-order biological popula-tion model space-time fractional Whitham-Broer-Kaup equations
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The (G'/G, 1/G)-expansion method and its application to travelling wave solutions of the Zakharov equations 被引量:14
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作者 LI Ling-xiao LI Er-qiang WANG Ming-liang 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2010年第4期454-462,共9页
The (G'/G, 1/G)-expansion method for finding exact travelling wave solutions of nonlinear evolution equations, which can be thought of as an extension of the (G'/G)-expansion method proposed recently, is present... The (G'/G, 1/G)-expansion method for finding exact travelling wave solutions of nonlinear evolution equations, which can be thought of as an extension of the (G'/G)-expansion method proposed recently, is presented. By using this method abundant travelling wave so- lutions with arbitrary parameters of the Zakharov equations are successfully obtained. When the parameters are replaced by special values, the well-known solitary wave solutions of the equations are rediscovered from the travelling waves. 展开更多
关键词 The (G /G 1/G)-expansion method travelling wave solutions homogeneous balance solitary wave solutions Zakharov equations.
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A connection between the(G'/G)-expansion method and the truncated Painlevé expansion method and its application to the mKdV equation 被引量:3
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作者 赵银龙 柳银萍 李志斌 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第3期41-46,共6页
Recently the (G′/G)-expansion method was proposed to find the traveling wave solutions of nonlinear evolution equations. This paper shows that the (G′/G)-expansion method is a special form of the truncated Pain... Recently the (G′/G)-expansion method was proposed to find the traveling wave solutions of nonlinear evolution equations. This paper shows that the (G′/G)-expansion method is a special form of the truncated Painlev'e expansion method by introducing an intermediate expansion method. Then the generalized (G′/G)-(G/G′) expansion method is naturally derived from the standpoint of the nonstandard truncated Painlev'e expansion. The application of the generalized method to the mKdV equation shows that it extends the range of exact solutions obtained by using the ( G′/ G)-expansion method. 展开更多
关键词 (G′/G)-expansion method truncated Painlev'e expansion method mKdV equation trav-eling wave solutions
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Exact Solution to Nonlinear Differential Equations of Fractional Order via (<i>G’</i>/<i>G</i>)-Expansion Method 被引量:4
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作者 Muhammad Younis Asim Zafar 《Applied Mathematics》 2014年第1期1-6,共6页
In this article, a new application to find the exact solutions of nonlinear partial time-space fractional differential Equation has been discussed. Firstly, the fractional complex transformation has been implemented t... In this article, a new application to find the exact solutions of nonlinear partial time-space fractional differential Equation has been discussed. Firstly, the fractional complex transformation has been implemented to convert nonlinear partial fractional differential Equations into nonlinear ordinary differential Equations. Afterwards, the (G'/G)-expansion method has been implemented, to celebrate the exact solutions of these Equations, in the sense of modified Riemann-Liouville derivative. As application, the exact solutions of time-space fractional Burgers’ Equation have been discussed. 展开更多
关键词 EXACT Solution to Nonlinear Differential Equations of Fractional Order VIA (G’/G)-expansion Method
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Comment on “Application of the (G'/G)-Expansion Method for Nonlinear Evolution Equations”[Phys.Lett.A 372 (2008) 3400] 被引量:3
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作者 ZHU Peng 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第8期206-208,共3页
In this paper,some travelling wave solutions involving parameters of the Modified Zakharov-Kuznetsovequation [Phys.Lett.A 372 (2008) 3400] are investigated.We will show that these solutions are not new travellingwave ... In this paper,some travelling wave solutions involving parameters of the Modified Zakharov-Kuznetsovequation [Phys.Lett.A 372 (2008) 3400] are investigated.We will show that these solutions are not new travellingwave solutions. 展开更多
关键词 (G'/G)-expansion method travelling wave solutions Modified Zakharov-Kuznetsov equation
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(G'/G)-Expansion Method Equivalent to Extended Tanh Function Method 被引量:1
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作者 LIU Chun-Ping 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第6期985-988,共4页
In a recent article [Physics Letters A 372 (2008) 417], Wang et al. proposed a method, which is called the (G′/G)-expansion method, to look for travelling wave solutions of nonlinear evolution equations. The trav... In a recent article [Physics Letters A 372 (2008) 417], Wang et al. proposed a method, which is called the (G′/G)-expansion method, to look for travelling wave solutions of nonlinear evolution equations. The travelling wave solutions involving parameters of the KdV equation, the mKdV equation, the variant Boussinesq equations, and the Hirota-Satsuma equations are obtained by using this method. They think the (G′/G)-expansion method is a new method and more travelling wave solutions of many nonlinear evolution equations can be obtained. In this paper, we will show that the (G′/G)-expansion method is equivalent to the extended tanh function method. 展开更多
关键词 (G′/G)-expansion method extended tanh function method Riccati equation KdV equation
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Exact solutions of the nonlinear differential-difference equations associated with the nonlinear electrical transmission line through a variable-coefficient discrete(G'/G)-expansion method 被引量:1
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作者 Sadou Abdoulkary Alidou Mohamadou +1 位作者 Ousmanou Dafounansou Serge Yamigno Doka 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第12期117-123,共7页
We investigated exact traveling soliton solutions for the nonlinear electrical transmission line. By applying a concise and straightforward method, the variable-coefficient discrete(G /G)-expansion method, we solve ... We investigated exact traveling soliton solutions for the nonlinear electrical transmission line. By applying a concise and straightforward method, the variable-coefficient discrete(G /G)-expansion method, we solve the nonlinear differential–difference equations associated with the network. We obtain some exact traveling wave solutions which include hyperbolic function solution, trigonometric function solution, rational solutions with arbitrary function, bright as well as dark solutions. 展开更多
关键词 nonlinear transmission line discrete(G /G)-expansion method solitary waves
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An Innovative Solutions for the Generalized FitzHugh-Nagumo Equation by Using the Generalized (G'/G)-Expansion Method 被引量:1
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作者 Sayed Kahlil Elagan Mohamed Sayed Yaser Salah Hamed 《Applied Mathematics》 2011年第4期470-474,共5页
In this paper, the generalized (G'/G)-expansion method is used for construct an innovative explicit traveling wave solutions involving parameter of the generalized FitzHugh-Nagumo equation , for some special param... In this paper, the generalized (G'/G)-expansion method is used for construct an innovative explicit traveling wave solutions involving parameter of the generalized FitzHugh-Nagumo equation , for some special parameter where satisfies a second order linear differential equation , , where and are functions of . 展开更多
关键词 FitzHugh-Nagumo EQUATION Generalized (G'/G)-expansion Method TRAVELING Wave Solutions
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General Solution of Two Generalized Form of Burgers Equation by Using the (<i>G</i><sup>'</sup>/<i>G</i>)-Expansion Method 被引量:1
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作者 Abdollah Borhanifar Reza Abazari 《Applied Mathematics》 2012年第2期158-168,共11页
In this work, the (G'/G)-expansion method is proposed for constructing more general exact solutions of two general form of Burgers type equation arising in fluid mechanics namely, Burgers-Korteweg-de Vries (Burger... In this work, the (G'/G)-expansion method is proposed for constructing more general exact solutions of two general form of Burgers type equation arising in fluid mechanics namely, Burgers-Korteweg-de Vries (Burgers-KdV) and Burger-Fisher equations. Our work is motivated by the fact that the (G'/G)-expansion method provides not only more general forms of solutions but also periodic and solitary waves. If we set the parameters in the obtained wider set of solutions as special values, then some previously known solutions can be recovered. The method appears to be easier and faster by means of a symbolic computation system. 展开更多
关键词 (G'/G)-expansion Method GENERALIZED Burgers-KdV EQUATION GENERALIZED Burgers-Fisher EQUATION Hyperbolic FUNCTION SOLUTIONS Trigonometric FUNCTION SOLUTIONS
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Analytical Treatment of the Evolutionary (1 + 1)-Dimensional Combined KdV-mKdV Equation via the Novel (G'/G)-Expansion Method 被引量:1
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作者 Md. Nur Alam Fethi Bin Muhammad Belgacem M. Ali Akbar 《Journal of Applied Mathematics and Physics》 2015年第12期1571-1579,共9页
The novel (G'/G)-expansion method is a powerful and simple technique for finding exact traveling wave solutions to nonlinear evolution equations (NLEEs). In this article, we study explicit exact traveling wave sol... The novel (G'/G)-expansion method is a powerful and simple technique for finding exact traveling wave solutions to nonlinear evolution equations (NLEEs). In this article, we study explicit exact traveling wave solutions for the (1 + 1)-dimensional combined KdV-mKdV equation by using the novel (G'/G)-expansion method. Consequently, various traveling wave solutions patterns including solitary wave solutions, periodic solutions, and kinks are detected and exhibited. 展开更多
关键词 Novel (G'/G)-expansion Method (1 + 1)-Dimensional COMBINED KdV-mKdV EQUATION Kink Patterns Nonlinear Evolution EQUATION Solitary WAVE SOLUTIONS Traveling WAVE SOLUTIONS
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Analytical and Traveling Wave Solutions to the Fifth Order Standard Sawada-Kotera Equation via the Generalized exp(-Φ(ξ))-Expansion Method 被引量:1
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作者 M. Y. Ali M. G. Hafez +1 位作者 M. K. H. Chowdury M. T. Akter 《Journal of Applied Mathematics and Physics》 2016年第2期262-271,共10页
In this article, we propose a generalized exp(-Φ(ξ))-expansion method and successfully implement it to find exact traveling wave solutions to the fifth order standard Sawada-Kotera (SK) equation. The exact traveling... In this article, we propose a generalized exp(-Φ(ξ))-expansion method and successfully implement it to find exact traveling wave solutions to the fifth order standard Sawada-Kotera (SK) equation. The exact traveling wave solutions are established in the form of trigonometric, hyperbolic, exponential and rational functions with some free parameters. It is shown that this method is standard, effective and easily applicable mathematical tool for solving nonlinear partial differential equations arises in the field of mathematical physics and engineering. 展开更多
关键词 Generalized exp(-Φ(ξ))-expansion Method Fifth Order Standard Sawada-Kotera Equation SOLITONS Periodic Wave Solutions
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Generalized and Improved(G′/G)-Expansion Method Combined with Jacobi Elliptic Equation
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作者 M.Ali Akbar Norhashidah Hj.Mohd.Ali E.M.E.Zayed 《Communications in Theoretical Physics》 SCIE CAS CSCD 2014年第6期669-676,共8页
In this article, we propose an alternative approach of the generalized and improved (G'/G)-expansion method and build some new exact traveling wave solutions of three nonlinear evolution equations, namely the Boiti... In this article, we propose an alternative approach of the generalized and improved (G'/G)-expansion method and build some new exact traveling wave solutions of three nonlinear evolution equations, namely the Boiti- Leon-Pempinelle equation, the Pochhammer-Chree equations and the Painleve integrable Burgers equation with free parameters. When the free parameters receive particular values, solitary wave solutions are constructed from the traveling waves. We use the Jacob/elliptic equation as an auxiliary equation in place of the second order linear equation. It is established that the proposed algorithm offers a further influential mathematical tool for constructing exact solutions of nonlinear evolution equations. 展开更多
关键词 Boiti-Leon-Pempinelle equation Painleve integrable burgers equation Pochhammer-Chree equa-tion (GI/G)-expansion method traveling wave solutions
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Exact Solutions of (2+1)-Dimensional Boiti-Leon-Pempinelle Equation with (G'/G)-Expansion Method
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作者 熊守全 夏铁成 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第7期35-37,共3页
In this paper,we construct exact solutions for the (2+1)-dimensional Boiti-Leon-Pempinelle equation byusing the (G'/G)-expansion method,and with the help of Maple.As a result,non-travelling wave solutions with thr... In this paper,we construct exact solutions for the (2+1)-dimensional Boiti-Leon-Pempinelle equation byusing the (G'/G)-expansion method,and with the help of Maple.As a result,non-travelling wave solutions with threearbitrary functions are obtained including hyperbolic function solutions,trigonometric function solutions,and rationalsolutions.This method can be applied to other higher-dimensional nonlinear partial differential equations. 展开更多
关键词 (2+1)-dimensional Boiti-Leon-Pempinelle equation (G′/G)-expansion method hyperbolic function solutions trigonometric function solutions
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The Riccati Equation Method Combined with the Generalized Extended (G'/G')-Expansion Method for Solving the Nonlinear KPP Equation
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作者 E. M. E. ZAYED Abdul-Ghani AL-NOWEHY 《Journal of Mathematical Research with Applications》 CSCD 2017年第5期577-590,共14页
An analytic study of the nonlinear Kolmogorov-Petrovskii-Piskunov (KPP) equa- tion is presented in this paper. The Riccati equation method combined with the generalized extended (G'/G')-expansion method is an ... An analytic study of the nonlinear Kolmogorov-Petrovskii-Piskunov (KPP) equa- tion is presented in this paper. The Riccati equation method combined with the generalized extended (G'/G')-expansion method is an interesting approach to find more general exact so- lutions of the nonlinear evolution equations in mathematical physics. We obtain the traveling wave solutions involving parameters, which are expressed by the hyperbolic and trigonometric function solutions. When the parameters are taken as special values, the solitary and periodic wave solutions are given. Comparison of our new results in this paper with the well-known results are given. 展开更多
关键词 the generalized extended (G'/G')-expansion method the Riccati equation method the nonlinear KPP equation exact solutions solitary wave solutions periodic wave solutions
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A Generalized Tanh-Function Type Method and the(G'/G) -Expansion Method for Solving
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作者 Weimin Zhang 《Applied Mathematics》 2013年第10期11-16,共6页
In this paper a generalized tanh-function type method is proposed by using the idea of the transformed rational function method. We show that the (G'/G)?-expansion method is a special case of the generalized tanh-... In this paper a generalized tanh-function type method is proposed by using the idea of the transformed rational function method. We show that the (G'/G)?-expansion method is a special case of the generalized tanh-function type method, so the (G'/G)?-expansion method is considered as a special deformation application of the transformed rational function method. We demonstrate that all solutions obtained by the (G'/G)?-expansion method were found by the generalized tanh-function type method. As applications, we consider mKdV equation. Compared with the (G'/G) -expansion method, the generalized tanh-function type method gives new and more abundant solutions. 展开更多
关键词 The GENERALIZED TANH-FUNCTION METHOD (G'/G) -expansion METHOD MKDV Equation The Transformed RATIONAL Function
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