用AHP法建立教学质量评估体系

以AHP为理论基础,结合Delphi方法,对高校教师教学质量评估体系进行尝试性建构。通过构建结构→个体判断→群判断处理→量化指标体系生成的分步操作,来达到科学、民主、公正、客观的评价目标。     

关于多个子空间的交空间与维数公式的推广

通过讨论,得到了关于多个子空间的交空间的进一步的结果.并利用这些结果,给出了维数公式的一个新的推广形式,从而完善了维数公式的理论.     

用模糊数学方法刻划公众对天气预报的感受度

气象部门将6小时的降雨按降雨量划分为无雨、小雨、中雨、大雨、暴雨、大暴雨及特大暴雨七个级别进行预报,这与公众感受认可这些降雨量级别的程度是有差异的.即使气象部门预报的很准,这种差异有可能使公众感受到降雨级别的程度和预报的级别不符,从而认为预报得不准确,用模糊数学的方法对公众的感受度进行了刻划,给出了计算预报数据与公众感受度差异的数值公式及方法.     

两个分块矩阵相似性的研究

给出两个分块矩阵相似的两个充分必要条件 .也就是说 ,如果两个方阵 A和 B在 A2 =0和 B2 =0的条件下 ,则两个分块矩阵 A C0 B 和 A 00 B 相似的充分必要条件是 :rank A C0 B =rank(A) +rank(B)和 AC +CB =0 .如果两个方阵 A和 B在 A2 =A和 B2 =B的条件下 ,则两个分块矩阵 A C0 B和 A 00 B 相似的充分必要条件是 :AC +CB =C.     

Existence of Lipschitzian solutions to the classical problem of the calculus of variations in the autonomous case

Under general growth assumptions, that include some cases of linear growth, we prove existence of Lipschitzian solutions to the problem of minimizing ∫_a^bL(x(s),x′(s)) ds with the boundary conditions x(a)=A, x(b)=B.     

关于向量组的秩与最大无关组的教学改革研究

对向量的秩与最大无关组的教学过程进行了分析研究，从教学内容组织与教学手段等方面提出了改革的方案．对有的教材的不足提出了改进办法.     

The Solvability of the Boundary Value Problem of the Four Elements with the Carleman Shift and Complex-conjugate Values

To following boundary value problem a(t)\overline{Φ^+(t)} + b(t)Φ^+[α(t)] + c(t)\overline{Φ^-(t)} + d(t)Φ^-[a(t)] = f(t) this paper has given out the number of linearly independent solutions and the conditions of solvability, so as to deepen the study of the problem to the same level as that of following problem a(t)\overline{Φ^+(t)} + b(t)Φ^+(t) + c(t)\overline{Φ^-(t)} + d(t)Φ^-(t) = f(t)     

On the motivic class of the stack of bundles

Let G be a split connected semisimple group over a field. We give a conjectural formula for the motivic class of the stack of G-bundles over a curve C, in terms of special values of the motivic zeta function of C. The formula is true if C=P¹ or G=SLn. If k=C, upon applying the Poincaré or called the Serre characteristic by some authors the formula reduces to results of Teleman and Atiyah-Bott on the gauge group. If k=Fq, upon applying the counting measure, it reduces to the fact that the Tamagawa number of G over the function field of C is |π₁(G)|.     

《线性代数》内容的关联性研究

《线性代数》学科知识点关联性强、相互交叉相互引证的情况比较多.清晰把握知识点之间的关系成为有效教学的重要前提.本文通过建构知识点关联层次图,试图理顺知识点关系、把握好内容格局,并结合教学经验提出一种教学时序.     

Asymptotic expansion of the solution to the convective diffusion problem in the wake of a spherical particle

The exterior boundary value problem of steady-state diffusion around a spherical particle placed in a Stokes flow is considered at high Peclet numbers. A complete asymptotic expansion of the solution in the wake of the particle is constructed by the method of matched asymptotic expansions.     

A Note on the Theorems of Church-Turing and Trachtenbrot

We sketch proofs of the theorems of Church-Turing and Trachtenbrot using a semi-monomorphic axiomatization. Mathematics Subject Classification : 03B10, 03B25.     

基于灰色组合模型的发动机研制费用估算研究

参数估算法作为LCC的一种估算方法主要应用于武器装备研制费用的估算.由于样本数据较少,且变量之间的线性相关程度较高,如果使用传统的多元线性回归方程法估算,则会严重降低估计结果的有效性.为解决这一问题,研究了灰色组合模型在发动机研制费用估算中的应用.通过实例计算表明,本方法用较少的样本可以得到较高的估算精度.     

Some explicit formulas for the polynomial decomposition of the matrix exponential and applications

This paper is devoted to the study of some formulas for polynomial decomposition of the exponential of a square matrix A. More precisely, we suppose that the minimal polynomial M_A(X) of A is known and has degree m. Therefore, e^tA is given in terms of P₀(A),…,P_m−1(A), where the P_j(A) are polynomials in A of degree less than m, and some explicit analytic functions. Examples and applications are given. In particular, the two cases m=5 and m=6 are considered.     

A Connection Between the Reticulation of a Ring of Quotients and the Localization Lattice of the Reticulation of a Commutative Ring

Through this article, R denotes a commutative ring with identity. The aim of this article is to construct a morphism of lattices between the reticulation of a ring of quotients (of a commutative ring with respect to a Gabriel topology) and the localization lattice of the reticulation of the initial ring. The article is structured as follows: The first section introduces all the necessary notions required to simplify the reading of the article. The second section presents some properties of the topology induced by a Gabriel topology on the reticulation L(R). In the third section the morphism δ, which achieves the intended link, is constructed. The last section studies the defined morphism in some particular cases.     

方差分析平方和分解分析方法的一种新形式——数理统计方差分析教学的一种新方法

给出了不同于其他教材的平方和分解形式,它可以更为直观地证明和得到方差分析所需检验统计量的分布.     

2010年全国研究生数模竞赛D题的评阅综述

2010年全国研究生数学建模竞赛D题的素材取自一项科研项目.将本题建为何种模型取决于建模人的数学基础和对本题描述运动过程的认识深度.评述介绍了三种建模思路:刚体平面运动模型,最优控制模型和微分方程模型,其中微分方程模型是在阅卷过程中从考生答卷中发现的,从答卷中发现了不少有共性的毛病,反应出国内大学和研究生数学教育中的弊病,值得有识之士们重视.     

关于函数空间Y~X上三个特殊拓扑间关系的讨论

本文对函数空间上的一致收敛拓扑、紧收敛拓扑及 Cauchy收敛拓扑之间的关系进行了讨论 ,给出了这三个拓扑间两两等价的充要条件