一类广义非线性Schrdinger扰动方程的泛函渐近解法

研究了一类非线性Schrdinager扰动耦合系统.利用近似解相关联的特殊方法,首先讨论了对应的线性系统,并得到了其精确解.再利用泛函迭代的方法得到了非线性Schrdinger扰动耦合系统的泛函渐近解析解.这个渐近解是一个解析式,还可对它进行解析运算.这对使用简单的模拟方法得到的近似解是达不到的.     

非线性扰动耦合Schrdinger系统激波的近似解法

研究了一类非线性扰动耦合Schrdinger系统.利用精确解与近似解相关联的特殊技巧,首先讨论了对应典型的耦合系统,利用投射法得到了精确的激波行波解.再利用近似方法得到了扰动耦合Schrdinger系统的行波渐近解.     

广义Schr(o)dinger扰动耦合系统孤子解

研究了一类广义非线性Schr(o)dinger扰动耦合系统.首先,利用待定系数投射的特殊方法求得了相应的无扰动耦合系统的孤子精确行波解.然后,选定对应的无扰动耦合系统的精确行波解作为扰动系统的初始近似,再用同伦分析方法,构造了一组同伦映射,依次得到原扰动耦合系统的各次近似解.最后通过举例,并参照摄动理论可以看出:由同伦分析方法得到的广义非线性Schr(o)dinger扰动耦合系统的近似解方便而有效.     

Wick型随机非线性Schr(o)dinger方程的白噪声泛函解

本文对变系数非线性Schr(o)dinger方程通过白噪声扰动得到的Wick型随机非线性Schr(o)dinger方程进行了研究,利用Hermite变换和Painlevé展开方法给出了该方程的白燥声泛函解.     

广义Schrdinger扰动耦合系统孤子解

研究了一类广义非线性Schrdinger扰动耦合系统.首先,利用待定系数投射的特殊方法求得了相应的无扰动耦合系统的孤子精确行波解.然后,选定对应的无扰动耦合系统的精确行波解作为扰动系统的初始近似,再用同伦分析方法,构造了一组同伦映射,依次得到原扰动耦合系统的各次近似解.最后通过举例,并参照摄动理论可以看出:由同伦分析方法得到的广义非线性Schrdinger扰动耦合系统的近似解方便而有效.     

Wick型随机非线性Schrdinger方程的白噪声泛函解(英文)

本文对变系数非线性Schrdinger方程通过白噪声扰动得到的Wick型随机非线性Schrdinger方程进行了研究,利用Hermite变换和Painlevé展开方法给出了该方程的白燥声泛函解.     

新的变系数可积耦合非线性Schr(o)dinger方程及其孤子解

基于延拓结构和Hirota双线性方法研究了广义的变系数耦合非线性Schr(o)dinger方程.首先导出了3组新的变系数可积耦合非线性Schr(o)dinger方程及其线性谱问题(Lax对),然后利用Hirota双线性方法给出了它们的单、双向量孤子解.这些向量孤子解在光孤子通讯中有重要的应用.     

一类耦合非线性Schr(o)dinger方程的Painlevé性质、严格解及其在大气重力波中的应用

讨论了大气科学里的一类耦合非线性Schr(o)dinger方程的Painlevé可积性和严格解.并给出了这个耦合方程通过Painlevé性质检测的参数条件.应用椭圆余弦函数展开法,得到了这个耦合非线性Schr(o)dinger方程的20个周期椭圆余弦波解.这些严格解被用应用于解释大气重力波的产生和传输机制.     

一类KdV非线性Schr(o)dinger组合微分方程组时间周期解的存在性

本文研究了一类KdV非线性Schr(o)dinger组合微分方程组时间周期解的问题,首先利用Galerkin方法构造近似时间周期解序列,然后利用先验估计和Leray-Schauder不动点原理,证明近似时间周期解序列的收敛性,从而得到该问题时间周期解的存在性.     

(2+1)维非线性Schr(o)dinger型方程的同宿轨道

研究了几类(2 1)维非线性Schr(o)dinger型方程同宿轨道的问题.利用Hirota双线性算子方法, 通过给出的相关变换, 得到了包括(2 1)维的长短波相互作用方程, 广义Zakharov方程, Mel'nikov方程和g-Schr(o)dinger方程的同宿轨道解的显式解析表达式,从而讨论了这些方程的同宿轨道.     

A REPRESENTATION FORMULA RELATED TO SCHR(O)DINGER OPERATORS

Schr(o)dinger operator is a central subject in the mathematical study of quantum mechanics.Consider the Schrodinger operator H = -△ V on R, where △ = d2/dx2 and the potential function V is real valued. In Fourier analysis, it is well-known that a square integrable function admits an expansion with exponentials as eigenfunctions of -△. A natural conjecture is that an L2 function admits a similar expansion in terms of "eigenfunctions" of H, a perturbation of the Laplacian (see [7], Ch. Ⅺ and the notes), under certain condition on V.     

On a class of self-similar processes with stationary increments in higher order Wiener chaoses

We study a class of self-similar processes with stationary increments belonging to higher order Wiener chaoses which are similar to Hermite processes. We obtain an almost sure wavelet-like expansion of these processes. This allows us to compute the pointwise and local Hölder regularity of sample paths and to analyse their behaviour at infinity. We also provide some results on the Hausdorff dimension of the range and graphs of multidimensional anisotropic self-similar processes with stationary increments defined by multiple Wiener–Itô integrals.     

On a class of Riemann surfaces

It is considered the class of Riemann surfaces with dimT1 = 0, where T1 is a subclass of exact harmonic forms which is one of the factors in the orthogonal decomposition of the spaceΩH of harmonic forms of the surface, namely The surfaces in the class OHD and the class of planar surfaces satisfy dimT1 = 0. A.Pfluger posed the question whether there might exist other surfaces outside those two classes. Here it is shown that in the case of finite genus g, we should look for a surface S with dimT1 = 0 among the surfaces of the form Sg\K , where Sg is a closed surface of genus g and K a compact set of positive harmonic measure with perfect components and very irregular boundary.     

CONTENTS OF VOLUME 30

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Instructions for contributions

正Applied Mathematics-A Journal of Chinese Universities,Series B(Appl.Math.J.Chinese Univ.,Ser.B)is a comprehensive applied mathematics journal jointly sponsored by Zhejiang University,China Society for Industrial and Applied Mathematics,and Springer-Verlag.It is a quarterly journal with     

Journal of Mathematical Research with Applications Guide for Authors

正Journal overview:Journal of Mathematical Research with Applications(JMRA),formerly Journal of Mathematical Research and Exposition(JMRE)created in 1981,one of the transactions of China Society for Industrial and Applied Mathematics,is a home for original research papers of the highest quality in all areas of mathematics with applications.The target audience comprises:pure and applied mathematicians,graduate students in broad fields of sciences and technology,scientists and engineers interested in mathematics.     

Staircase transportation problems with superadditive rewards and cumulative capacities

A cumulative-capacitated transportation problem is studied. The supply nodes and demand nodes are each chains. Shipments from a supply node to a demand node are possible only if the pair lies in a sublattice, or equivalently, in a staircase disjoint union of rectangles, of the product of the two chains. There are (lattice) superadditive upper bounds on the cumulative flows in all leading subrectangles of each rectangle. It is shown that there is a greatest cumulative flow formed by the natural generalization of the South-West Corner Rule that respects cumulative-flow capacities; it has maximum reward when the rewards are (lattice) superadditive; it is integer if the supplies, demands and capacities are integer; and it can be calculated myopically in linear time. The result is specialized to earlier work of Hoeffding (1940), Fréchet (1951), Lorentz (1953), Hoffman (1963) and Barnes and Hoffman (1985). Applications are given to extreme constrained bivariate distributions, optimal distribution with limited one-way product substitution and, generalizing results of Derman and Klein (1958), optimal sales with age-dependent rewards and capacities.To our friend, Philip Wolfe, with admiration and affection, on the occasion of his 65th birthday.Research was supported respectively by the IBM T.J. Watson and IBM Almaden Research Centers and is a minor revision of the IBM Research Report [6].