APPLICATIONS OF HAMILTONIAN AND LAPLACE TRANSFORM IN AN ECONOMIC MODEL

Since 1928, Ramsey introduced variation to analysis the optimal savings in an intertemproal model. Mathematics becomes an important tool for economists, such as Pontryagin'sMaximal Principle, Bellman Principle, Dynamics etc. These mathematical tools give economya new viewpoint, on the other hand, it also gives mathematicians a good application exaxnple.In this paper, we apply Hamilton system and Laplace transform to analysis the long-run effectsand short-run effects of foreign aid on domes…     

THE SINE TRANSFORM OPERATOR IN THE BANACH SPACE OF SYMMETRIC MATRICES AND ITS APPLICATION IN IMAGE RESTORATION

In this paper, we study an operator s which maps every n-by-n symmetric matrix A, to a matrix s(A_n) that minimizes || B_n-A_n || F over the set of all matrices B_n, that can be diagonalized by the sine transform. The matrix s(A_n), called the optimal sine transform preconditioner, is defined for any n-by-n symmetric matrices A_n. The cost of constructing s(A_n) is the same as that of optimal circulant preconditioner c(A_n) which is defined in [8], The s(A_n) has been proved in [6] to be a good preconditioner in solving symmetric Toeplitz systems with the preconditioned conjugate gradient (PCG) method. In this paper, we discuss the algebraic and geometric properties of the operator s, and compute its operator norms in Banach spaces of symmetric matrices. Some numerical tests and an application in image restoration are also given.     

A FAST SINE TRANSFORM ALGORITHM FOR TOEPLITZ MATRICES AND ITS APPLICATIONS

In this paper, a fast algorithm for the discrete sine transform(DST) of a Toeplitz matrix of order N is derived. Only O(N log N) O(M) time is needed for the computation of M elements. The auxiliary storage requirement is O(N). An application of the new fast algorithm is also discussed.     

A NEW INTEGRAL TRANSFORM AND ITS APPLICATIONS

In the present paper,the authors introduce a new integral transform which yields a number of potentially useful(known or new) integral transfoms as its special cases.Many fundamental results about this new integral transform,which are established in this paper,include(for example) existence theorem,Parseval-type relationship and inversion formula.The relationship between the new integral transform with the H-function and the H-transform are characterized by means of some integral identities.The introduced transform is also used to find solution to a certain differential equation.Some illustrative examples are also given.     

有限域上的仿射辛空间及其应用

本文中，首先给出了有限域Ｆｑ上的２ｖ维仿射辛空间ＡＳＧ（２ｖ，Ｆｑ）和２ｖ次仿射辛群ＡＳｐ２ｖ（Ｆｑ）的概念，然后讨论ＡＳｐ２ｖ（Ｆｑ）作用在ＡＳＧ（２ｖ，Ｆｑ）上的可迁性及一些相关的计数定理，最后给出应用仿射辛空间构作结合方案和认证码的例子。     

双曲空间中Veljan-Korchmaros型不等式及应用

本文研究了双曲空间Hn(K)中n维高维单形的几何不等式问题.利用距离几何的理论与方法,获得了涉及n维双曲单形体积,侧面积与棱长的几个几何不等式,这些几何不等式是双曲单形几何不等式的基础.     

Finsler流形上Laplace比较定理及其应用

本文研究了Finsler流形上距离函数的Laplacian.利用Schwarz不等式和[5]中主要方法,获得了具有负曲率的Laplacian比较定理,进而得到了Finsler流形上第一特征值的下界估计.     

高维广义积分子波变换及其性质

在Soblev空间上定义了一种新的广义积分子波变换,它包括了通常意义下的子波变换,付氏变换,R-变换,同时改进和延伸了朱在文献[1]中引入的广义积分子波变换等.并且对这种新的子波变换的基本性质进行了研究.     

n维双曲空间和n维球面空间中的正弦定理及应用

本文研究了n维双曲空间和n维球面空间中单形的正弦定理和相关几何不等式. 应用距离几何的理论和方法, 给出了n维双曲空间和n维球面空间中一种新形式的正弦定理, 利用建立的正弦定理获得了Hadamard 型和Veljan-Korchmaros型不等式. 另外, 建立了涉及两个n维双曲单形和n维球面单形的"度量加"的一些几何不等式.     

Beyond sumudu transform and natural transform: J-transform properties and applications

In this paper, we introduce an efficient integral transform called the ${\mathbb J}$-transform which is a modification of the well-known Sumudu transform and the Natural transform for solving differential equations with real applications in applied physical sciences and engineering. The ${\mathbb J}$-transform is more advantageous than both the Sumudu transform and the Natural transform. Interestingly, our proposed ${\mathbb J}$-transform can be applied successfully to solve complex problems that are ordinarily beyond the scope of either Sumudu transform or Natural transform. As a proof of concept, we consider some classic examples and highlight the limitations of the previously reported integral transforms and lastly demonstrate the superiority of the proposed ${\mathbb J}$-transform in addressing those limitations.     

H~2(I)空间中的离散小波变换

1．Sobolev空间H2（I）,（I）和多尺度分析设J=[0.L],L是一个正整数．不妨设L＞4．Soblev空间（I）,（I）为易知（I）是具有如下内积的Hilbert空间是（I）的一个范数．利用山中建立的三次样条小波,我们给出一个内尺度函数p（x）和一个有紧文集的边尺度函数pb…）：易知pN满足双尺度方程对任意人（E尽Z是整数集合,记且今N是由忡人以一：0三k三ZjL一头w。,j（x）,w＆tj（L－x）｝张成的线性空间,即根据山可以建立,N,jEZ”是如下意义下具有范数（1．购的瑞（I）空间的一个多尺度分析（＊＊A）：（tv）对每个JEZ”,忡j,…     

广义M(o|¨)bius变换和算术Fourier变换

离散Fourier变换(DFT)在数字信号处理等许多领域中占有重要地位.近年来,出现一种优于FFT的算术Fourier变换来计算DFT.在广义Mobius变换的基础上,本文采用了一种改进的AFT来计算DFT,这种方法可以直接提取DFT的系数,且用数论的方法阐明了这一过程,并展开了进一步的讨论.这也代表了数论方法应用在计算数学领域的一个新的发展方向.     

MULTIVARIATE FOURIER TRANSFORM METHODS OVER SIMPLEX AND SUPER-SIMPLEX DOMAINS

In this paper we propose the well-known Fourier method on some non-tensor productdomains in R~d, inclding simplex and so-called super-simplex which consists of (d 1)!simplices. As two examples, in 2-D and 3-D case a super-simplex is shown as a parallelhexagon and a parallel quadrilateral dodecahedron, respectively. We have extended mostof concepts and results of the traditional Fourier methods on multivariate cases, such asFourier basis system, Fourier series, discrete Fourier transform (DFT) and its fast algorithm(FFT) on the super-simplex, as well as generalized sine and cosine transforms (DST, DCT)and related fast algorithms over a simplex. The relationship between the basic orthogonalsystem and eigen-functions of a Laplacian-like operator over these domains is explored.     

Solving nonlinear ordinary differential equations using the NDM

In this research paper, we examine a novel method called the Natural Decomposition Method (NDM). We use the NDM to obtain exact solutions for three different types of nonlinear ordinary differential equations (NLODEs). The NDM is based on the Natural transform method (NTM) and the Adomian decomposition method (ADM). By using the new method, we successfully handle some class of nonlinear ordinary differential equations in a simple and elegant way. The proposed method gives exact solutions in the form of a rapid convergence series. Hence, the Natural Decomposition Method (NDM) is an excellent mathematical tool for solving linear and nonlinear differential equation. One can conclude that the NDM is efficient and easy to use.     

广义小波变换及其在人工神经网络中的应用

相应于非线性系统用人工神经网络的逼近问题，本文引入了一种新的小波变换并研究了其性质.作为推论，本文给出了在Lp范数下单个隐层前馈神经网络逼近定理的构造性证明.     

简化原理在Hilbert空间与可分Banach空间的一些应用

本文研究了简化原理在Hilbert空间与可分Banach空间中的一些应用,利用简化原理和独立随机元收敛准则获得了中分Banach空间随机级数的收缩原理和B-值随机Dirichlet级数简单收敛横坐标及一般随机整函数的增长性和值分布,将许多以Rademacher序列为系数的随机Tayor级数和随机Dirichlet级数的相关结果,推广到一般的具有独立对称分布系数的随机级数上去。     

Journe小波变换像空间描述

1引言1950年N.Aronszjan发表的一篇综述性文章《Theory of reproducing kernels》标志再生核理论的初步形成.由于再生核有许多良好的计算性质,S.Saitoh总结并深入研究再生核基本理论,进一步拓展了再生核的应用领域;徐利治把再生核应用于L~2(B)(B是复平面上的一个区域)中解析函数重积分降维问题,并提出了一个能对一些预先给出的     

Approximation by bicomplex beta operators in compact ‐disks

The main object of this paper is to extend some known approximation results for the complex beta operators of the first kind attached to analytic functions in strips of compact disks. The extensions of these approximation properties, which are presented here, involve bicomplex beta operators in compact ‐disk. Several other related results are also considered. Copyright © 2016 John Wiley & Sons, Ltd.     

Radon变换和衰减Radon变换的分析研究

衰减Radon变换出现在单光子放射型计算机层析成像中。本文首先回顾和研究了Radon变换和衰减Radon变换及其反演的有关结论，进而提出了Tretiak-Metz结果的一种新证明方法，对于一般对象，本文用变换方法非滤子背投影法导出了衰减Radon变换的反演公式。     

WAVELET TRANSFORM IN FRACTAL IMAGE ENCODING

This paper presents some results of the relation between wavelet transform and fractal transform. The wavelet transform of the attractor of fractal transform posseses translational and scale invariance. So we speed the fractal image encoding by testing the invariance of the wavelet transform appropriate for image encoding. The classfication scheme of range blocks by wavelet transform is given in this paper.