双曲型积分方程的一个反问题

本文研究一类双曲型积分微分方程的一个反问题，即确定方程Ｄ２ｔｕ－Ｄ２ｘｕ＝∫ｔ０ｋ（Ｔ）ｕ（ｘ，ｔ－Ｔ）ｄＴ中ｕ（ｘ，ｔ）和积分核ｋ（ｔ），得到了解的存在性和唯一性．     

Periodic Solution of Nonautonomous System with Continuous Time Delays

Ｗｅｃｏｎｓｉｄｅｒｔｈｅｎｏｎａｕｔｏｎｏｍｏｕｓｃｏｏｐｅｒａｔｉｖｅｓｙｓｔｅｍｗｉｔｈｃｏｎｔｉｎｕｏｕｓｔｉｍｅｄｅｌａｙｘ（ｔ）＝ｘ（ｔ）［ａ１（ｔ）－ａ２（ｔ）ｘ（ｔ）＋ａ３（ｔ）∫０－τｋ１（ｓ）ｘ（ｔ＋ｓ）ｄｓ－ａ４（ｔ）∫０－τｋ...     

抽象算子在偏微分方程中的应用(Ⅱ)

Ｔｈｅｏｒｅｍ１　Ｌｅｔｍ∈Ｎａｎｄｍ１,Ｐ（ｘ）ｂｅａｎａｒｂｉｔｒａｒｙｏｒｄｅｒｐａｒｔｉａｌｄｉｆｆｅｒｅｎｔｉａｌｏｐｅｒａ－ｔｏｒ．Ｔｈｅｎｆ（ｘ,ｔ）,φｊ（ｘ）∈Ｊ．（ＷｈｅｒｅＪｓｔａｎｄｆｏｒｔｈｅｓｅｔｏｆａｎａｌｙｔｉｃｆｕｎｃｔｉｏｎｉｎｔｈｉｓｐａｐｅｒ）ｔ＋Ｐ（ｘ）ｍｕ＝ｆ（ｘ,ｔ）ｊｕｔｊｔ＝０＝φｊ（ｘ）　　ｘ∈Ｒｎ,ｔ∈Ｒ１ｊ＝０,１,２,…,ｍ－１．ｕ（ｘ,ｔ）＝∫ｔ０（ｔ－τ）ｍ－１（ｍ－１）！ｅ－（ｔ－τ）Ｐ（ｘ）ｆ（ｘ,τ）ｄτ＋ｅ－…     

一类抛物型偏泛函微分方程解的强迫振动性

本文研究抛物型偏泛函微分方程γ／γｔ［ｕ－ｍΣｔ－１Ｃｔ（ｔ）ｕ（ｘ，ｔ－τｔ）］＝ａ（ｔ）Δｕ－Ｐ（ｘ，ｔ）ｕ－Ｑ（ｘ，ｔ）Ｇ［ｕ（ｘ，ｐ（ｔ）］＋Ｆ（ｘ，ｔ），（ｘ，ｔ）包含Ｄ×［０，＋∞］解的强近振动性，其中Ｄ为Ｒ＾ｎ中具有逐片光滑边办γＤ的有界区域，ｕ＝ｕ（ｘ，ｔ），Δ是Ｒ＾ｎ中的Ｌａｐｌａｃｅ算子。     

ON THE PARTIAL STABILITY OF IMPULSIVE DIFFERENTIAL EQUATIONS

１ＩｎｔｒｏｄｕｃｔｉｏｎａｎｄＬｅｍｍａｓＣｏｎｓｉｄｅｒｔｈｅｆｏｌｏｗｉｎｇｄｉｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎｓｗｉｔｈｉｍｐｕｌｓｉｖｅｅｆｅｃｔｓ：ｘ′＝ｆ（ｔ，ｘ），ｔ≠τｋ，△ｘ＝Ｉｋ（ｘ），ｔ＝τｋ，ｋ＝１，２，…，（１）ｗｈｅｒ...     

高阶具“积分小”系数中立型微分方程的振动性

本文提出了一种研究高阶中立型方程「ｘ（ｔ）－Ｐ（ｔ）ｘ（Ｔ－τ）」＾（ｎ）＋Ｑ（ｔ）ｘ（ｔ－δ）＝０,ｔ≥ｔ振动性的新技巧,其中不需要通常的积分发散条件∫＾∞Ｑ（ｓ）ｄｓ＝∞。     

一类带滞量的微分方程解的表达式的讨论

本讨论了方程ａｎｘ＾（ｎ）（ｔ）＋…＋ａ０ｘ（ｔ）＋ｂｘ（ｔ－τ）＝ｔ＾ｋ的解的一些表达式。     

中立型积分微分方程有界解的振动

研究二阶中立型积分微分方程：「ｘ（ｔ）－∫＾τ０ｐ（ｓ）ｘ（ｔ－ｓ）ｄｓ」″＝∫＾σ０ｑ（ｓ）ｘ（ｔ－ｓ）ｄｓ建立了该方程的所有有界解振动的一个充分必要条件。     

一类微分差分方程的周期解

本文研究微分差分方程ｘ＇（ｔ）＝－ｆ（ｘ（ｔ），ｘ（ｔ－τ１））－ｆ（ｘ（ｔ），ｘ（ｔ－τ２））－．．．－ｆ（ｘ（ｔ），ｘ（ｔ－τｎ））非平凡周期解的存在性问题，得到了一些判别准则，推广和改进了文［１－４］的工作。     

二阶NFDE零解的稳定性

本文给出了二阶中立型微分方程ｘ（ｔ）＋ｘ（ｔ－τ）＋ｂｘ（ｔ）＋ｂ１ｘ（ｔ－τ）＋ｃｘ（ｔ）＋ｃ１ｘ（ｔ－τ）＝０零解稳定的代数判据．     

Qualitative Analysis of Bifurcating Solutions in the Lengyel-Epstein Model

One of the most fundamental problems in theoretical biology is to explain the mechanisms by which patterns and forms are created in the＇living world. In his seminal paper ＂The Chemical Basis of Morphogenesis＂, Turing showed that a system of coupled reaction-diffusion equations can be used to describe patterns and forms in biological systems. However, the first experimental evidence to the Turing patterns was observed by De Kepper and her associates（1990） on the CIMA reaction in an open unstirred reactor, almost 40 years after Turing＇s prediction. Lengyel and Epstein characterized this famous experiment using a system of reaction-diffusion equations. The Lengyel-Epstein model is in the form as follows     

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.     

(0,1 ;0)-INTERPOLATION ON INFINITE INTERVAL (-∞, +∞)

In this paper, we study the explicit representation and convergence of (0, 1; 0)-interpolation on infinite interval, which means to determine a polynomial of degree ≤ 3n - 2 when the function values are prescribed at two set of points namely the zeros of Hn(x) and H′n(x) and the first derivatives at the zeros of H′n(x).     

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].