一种改进的灰色多层次综合评判法

介绍了一种改进的灰色多层次综合评判法，并证明当评价中用各方案中的最优值作为参考数据列时，新方法与献[1]所述的灰色多层次综合评判法所得的评判矩阵是相等的。     

快速筛选优胜者的最优策略

“快速遴选优胜者”一文 (简称文 [1 ])是刊登在《数学的实践与认识》96.4上的一份关于 MCM96B题的答卷 .它虽然给出了正确选出优胜者的方案 ,但它无法证明此方案是最优的 ,而且对于裁判数额等参数只给出了粗略的估计 .针对上述问题 ,本文对 MCM96B题又作了详尽的分析 ,通过论证给出了快速遴选优胜者的最优方案 ,而且给出了裁判数额与阅卷经费等参数的最优配置模型 .     

基于理想关联度的不确定多属性决策方法

针对只有部分属性权重信息且属性值以区间数形式给出的不确定多属性决策问题,提出了一种逼近理想关联度的决策分析方法。首先改进了文[4]给出的区间数决策矩阵的规范化方法;然后提出了利用期望-方差区间数排序方法求解理想最优方案;最后依据关联系数矩阵给出了属性权重信息不完全的区间数多属性决策问题的求解方法,其核心是求解线型规划得到属性权重,进而根据各个方案与理想最优方案的综合关联度大小进行排序。特别地,给出了属性权重完全未知的简洁方法,文后的实例验证了方法的可行性和有效性。     

综合评判中的凸性

应用Ｆｕｚｚｙ综合评判模型进行决策时，我们发现综合评判中的凸性是必不可少的。如果不具备凸性，就会产生无法决策，甚至矛盾的情况。本文讨论了综合评判中的凸性及其它对综合评判结果的影响，给出了产生凸性的一些充分条件，从理论和应用上进一步完善了模糊综合评判的模型。     

一种基于动态模糊综合评判的故障预测新方法

针对影响装备寿命的许多故障因素和故障关系具有复杂性、非确定性以及时变性的特点，指出了传统模糊综合评判方法的不足，提出了基于动态模糊综合评判的故障预测方法，给出了动态权重矩阵和动态隶属度的确定方法，以火炮反后坐装置为例对评判过程予以说明，证明了该方法的有效性和实用性。并将模糊综合评判与产生式规则相融合，利用复合推理机制提高预测结果的准确性。     

区间型多属性群体专家权重的确定方法

针对方案偏好和属性值均为区间数的多属性群决策问题，研究了群体专家权重的确定，并提出了一种新的群决策方法．通过定义区间数向量的内积，计算专家评判的相似度和差异度，进而客观地确定了专家的权重．求解最小化主、客观偏差的目标规划模型，得到了属性的权重，利用方案的群体综合属性值给出排序结果．供应商选择的应用实例验证了方法的可行性和合理性．     

基于三维Copula函数的金融指数相关性分析

给出了三维Copula函数模型中未知参数的估计方法及最优三维Copula函数的选择方法,此构造方法对研究多变量之间的相依性提供了新途径.通过对上证指数、深圳成指及创业板指的历史数据进行实证分析,选出了最优三维Copula函数以描述三者之间的相关性,并分析三者之间的尾部相关性.     

一种基于累积前景理论的直觉模糊动态决策方法

针对属性值为时间直觉模糊数的动态多属性决策问题,提出一种基于累积前景理论的直觉模糊动态决策方法.方法综合考虑决策者期望和决策信息熵两方面因素给出了时间权重的确定方法,以决策者期望和正负理想点作为参考方案确定前景矩阵,并以公平竞争原则确定最优属性权重,进而通过降维获得方案的综合前景值,根据综合前景值确定方案的排序.最后,通过实例说明了方法的可行性和科学有效性.     

多目标决策在技术经济分析中的应用

在技术经济分析中常常碰到这样一类问题:如何从所有备选方案中选出使纯经济效益指标与经济效率指标同时达到最优的方案。本文把这类问题归结为多目标决策问题,并且建立了相应的数学模型及其求解方法。     

Fuzzy-Grey综合评判模型与射击方案的优化

本考虑类别标准已确定的综合评判问题，将灰色理论中的关联分析用于Fuzzy综合评判模型，用灰色关联系数来替代隶属度，提出一种的综合评判的方法，运用于射击方案的优化．     

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     

(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).     

RECENT PROGRESS ON SPHERICAL HARMONIC APPROXIMATION MADE BY BNU RESEARCH GROUP ——In memory of Professor Sun Yongsheng

As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years （2001-2005）. The main topics are： convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.     

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.     

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.     

Journal of the Operations Research Society of China Special issue on Operations Research in Healthcare Management

正Guest Editors:Hong Chen,Shanghai Jiao Tong University,Shanghai,China Guohua Wan,Shanghai Jiao Tong University,Shanghai,China David Yao,Columbia University,New York,USA Scope:Healthcare delivery worldwide has been fraught with high cost,low efficiency and poor quality of patient care service.For the field of operations research(OR),healthcare offers some of the biggest challenges as well as best opportunities in     

ANALYSIS IN THEORY AND APPLICATIONS Vol. 30, 2014 CONTENTS

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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.     

An alternative mathematical algorithm for the photo- and videokeratoscope

Due to the resolution of current laser technology, the accuracy of corneal topography as measured by the videokeratoscope is no longer adequate to provide precise enough data for refractive surgery or for the fitting of customized contact lenses. We present an algorithm for recovering corneal topography that makes use of modern differential geometric techniques and numerical descent in Sobolev spaces. We believe this algorithm may be used with the photo- and videokeratoscope to increase the accuracy of the recovered corneal topography.