序信息系统中的双量化决策粗糙集模型

决策粗糙集和程度粗糙集作为两类广义的粗糙集模型,分别从相对信息量化和绝对信息量化的观点对经典的粗糙集模型进行了扩张。本文在序信息系统中将这两类广义粗糙集模型进行融合,即将决策粗糙集和程度粗糙集的近似算子重新组合,以此构造了两种不同类型的双量化粗糙集模型。然后,对模型的一些基本性质进行了讨论,新建立的粗糙集模型包含了相对量化信息和绝对量化信息。最后,通过对实际案例分析展现了双量化决策规则的获取方法,结果表明两类模型均可以有效的获取决策规则,本文为序信息系统中的决策分析提供了新的选择。     

基于粗糙集理论的相关关系预测方法研究

本基于粗糙集理论给出了对象与规则可信度的概念，提出了一种经济系统中相关关系预测法。利用信息熵的概念，评价因素的重要程度和约简因素，由此提取基本相关规则。在对象与规则之间的可信度基础上，建立了预测模型。与传统的回归预测法比较，这个方法不需要进行相关性判断、模型识别和检验，它直接从数据出发，在不损失信息的条件下约简冗余因素，寻找经济指标与影响因素之间的相关关系，能同时处理定性、定量因素以及不确定因素。算例计算说明了所提方法的有效性。     

基于目标信息系统学习的多准则决策方法

给出目标信息系统学习的多准则决策方法，建立多准则决策的规则学习模型，讨论该模型的性质。该模型优于Z．Pawlak方法，将规则提取与信息融合为一体。也优于AHP等模型，具有简洁性．通过实例计算，取得了满意结果。     

领导团队相对进步效度的一种动态测评方法

团队管理已经成为现代社会最佳的领导方式，以往的绝对进步效度（Absolute Progress Effectiveness）是通过领导团队绩效的对照期指标的比值来测算，本文应用数据包络分析（DataEnvelopment Amtysis）方法，结合团队成员的有效努力程度，通过个体相对进步指数测算相对进步效度（Relative Progress Effectiveness），真实地反映领导团队在等参照前提下的有效进步程度，有利于领导团队的阶段性自检和渐进性发展。     

有限Boole语义中基于前提信息的随机真度

本文研究了有限Boole语义中基于前提信息的随机化问题.利用赋值集的随机化方法,提出了公式的基于前提信息Γ的Γ-随机真度,得到了Γ-随机真度的MP规则,HS规则和交推理规则.通过引入公式间的Γ-随机相似度和Γ-伪距离,建立了Γ-随机逻辑度量空间,在有限Boole语义上推广了基于前提信息的近似推理理论.     

网站用户登录信息挖掘特征规则

本文首先研究了基本的面向属性归纳，提出了从网站用户登录信息中挖掘用户特征规则的思路。问题从解决多属性归纳着手，特点是首先建立概念树，然后用条件属性组合与约束的方法进行挖掘。实验表明，本文设计的模型能客观地描述客户行为，为从Web信息挖掘客户特征规则提出了一条有效的途径。     

基于粗糙集的经济预警规则发现

应用粗糙集的理论和方法对经济预警有关数据进行分析,挖掘其中隐含的有用信息,提取规则并对规则进行约简,从而求取表达经济预警信息的最小决策规则,为经济预警有用信息的获取提供一种有效的方法.     

成员间互动对团队绩效影响研究:基于和谐管理理论的视角

团队已成为组织中重要的工作方式之一，已有的研究表明团队成员间的互动对团队绩效具有显著影响。但由于成员间交互的动态性、非线性以及成员行为的差异等特点，使得成员互动与团队绩效之间关系的考察成为一大难题。本文基于和谐管理理论的基本思想，将成员交互模式与成员策略变化规则按照和、谐划分为四种交互类型，并利用拓展的复杂系统模型—NK模型，考察四种互动类型对团队绩效的影响。研究结论将为和谐管理理论提供仿真验证并为实践中的团队管理与绩效考评提供参考。     

市场需求信息不对称下的保兑仓融资风险控制策略

信息不对称风险广泛存在于保兑仓融资过程当中,本文运用Stackelberg博弈模型刻画融资系统成员关系,运用动态规划优化分析方法求解对应博弈均衡策略。总结出需求信息不对称的三种表现形式:信息造假,信息优势及信息隐匿,分析各类信息不对称情形对融资系统所造成影响,并相应提出实现信息显示功能的契约甄别机制。研究表明:零售商可从信息不对称中获取巨大信息优势,但对其他成员造成损害,其中信息隐匿对生产商损害程度更高;二部定价机制可实现信息甄别,但生产商须为之付出信息租金,造成效率损失;而合理参数设定下的二部定价加回购机制有助于进一步改进融资系统及各成员收益,甚至达到次协调状态,最终实现融资成员收益的帕累托改进。本研究对于控制供应链融资中的信息风险、改善融资效率提供了理论依据及决策参考。     

基于二次优势识别的竞优评价方法

针对组织环境下的竞优评价问题,依据"民主集中"的原则,提出了一种基于组织成员二次优势识别的竞优评价方法.首先,获得各组织成员不同的个体优势,并得到基于不同成员视角的个体代理评价值;然后,从最大限度突出组织成员整体优势的视角,对各成员的评价信息进行集中优化,并得到最终的评价值;最后,通过一个算例检验了所提方法的有效性和可行性.     

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     

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.     

(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 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.     

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.     

Boundedness for commutators of multipliers on Hardy type spaces

In this paper, we study the commutators generalized by multipliers and a BMO function. Under some assumptions, we establish its boundedness properties from certain atomic Hardy space Hb^p（R^n） into the Lebesgue space L^p with p 〈 1.     

A unified approach to certain problems of best local approximation

In this paper we study best local quasi-rational approximation and best local approximation from finite dimensional subspaces of vectorial functions of several variables. Our approach extends and unifies several problems concerning best local multi-point approximation in different norms.     

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