关于粘性导数的几个性质的探讨

M .G .Crandall等人在文 [1]中给出了函数的粘性导数的概念。在这个概念的基础上我们讨论了函数的粘性导数的上 (下 )导集的几个性质 :在函数可微点处的性质、闭凸性质、与C1类函数的和的性质、与C2 类函数的差在严格局部极大 (小 )值点的性质。     

几个重要积分不等式

从简单的代数不等式ab~≤a+b/2出发,通过变形,观察,猜想,用极限思想得出并证明了一些新的积分不等式。     

一类G与G相交于一点的图的特征值

图G的特征值是图的一个重要不变量。在量子化学和理论化学中有大量的应用。当图G的顶点数较大时,其邻接矩阵的阶数较大,计算特征值较困难。分块降阶是通常的方法。本文针对一些特殊图的邻接矩阵进行分块降阶求特征值。如果在V(G)上有一个一一映射φ,使得φ(vi)=vn-i 1,i=1,2,…,n,那么G的点v1仅与G的点v1重合的图G G的特征值中有G-V1的特征值。     

Implicit knowledge of general upper secondary school in a bridge-building project

Bridge-building activities are practiced widely in the education systems of Europe. They are meant to bridge transitions between lower and upper secondary school and form a mandatory part of the youth guidance system in Denmark. By giving pupils the opportunity to experience the different educational context of upper secondary school, bridge-building activities are meant to facilitate their decision-making on educational paths, but also to attract more and new groups of pupils. However, the premises of the inherent differences of educational contexts and of pupils’ lacking knowledge of upper secondary education can be questioned. In this ethnographic case study of a bridge-building project in a rural area in Denmark, we analyse the implicit knowledge of the general upper secondary school, as it is practiced in a bridge-building project, and how it is experienced by the pupils on the background of their prior knowledge. The analysis is theoretically informed by especially the code concepts of Basil Bernstein.     

Area-time associated test cost model for SoC and lower bound of test time

A novel test access mechanism (TAM) architecture with multi test-channel (TC) based on IEEE Standard 1500 is proposed instead of the traditional sub-TAM structure. The cost model of an area-time associated test and the corresponding lower bound of system-on-chip (SoC) test time are established based on this TAM architecture. The model provides a more reliable method to control the SoC scheduling and reduces the complexity in related algorithm research. The result based on the area time associated test cost model has been validated using the ITC’02 test benchmark.     

一类微分系统特征值的带权估计

考虑某类微分系统特征值的带权估计,利用分部积分、Rayleigh定理和不等式估计等方法和技巧,获得了用前n个特征值来估计第n+1个特征值的上界不等式,其估计系数与区域的几何度无关,其结果在物理和力学等领域中应用广泛。     

常系数齐线性微分方程组的一种解法

从广义特征向量的定义出发,给出了常系数齐线性微分方程组的一基本解组的形式,运用此基本解组形式解常系数齐线性微分方程组比较简单.     

我党执政中自律系统与他律系统的结合类型研究

根据“三个代表”的重要思想和“与时俱进,开拓创新”的时代精神,运用组织健康运转原理,通过对我党约束机制进行历史性的分析,把自律系统和他律系统的结合类型可分为三种类型:利益一致直属相交型,利益对抗互不相容平行型和利益一致根部相交平行型,讨论了各种类型的特点和适用条件,并对我党的组织机构改善提出了合理化建议。     

非线性n阶微分方程多点边值问题

用上、下解方法研究了n阶非线性微分方程k点边值问题y(n)=f(t,y(n-2),y(n-1))y(i)(di)=ai(i=0,1,…,n-3),g(y(n-2)(t1),y(n-1)(t1))=0,h(y(n-2)(tk),y(n-1)(tk))=0(1)　　　解的存在性、唯一性。其中tj∈R,j=1,2,…,k;t1相似文献   

高校体育课程实施心理拓展训练探讨

从理论与实践角度对心理拓展训练进行分析研究,结果表明:在高校体育课中开展拓展训练是完全可行的。拓展训练进入高校将有利于推动传统体育教育模式的改革,对深化体育教育改革和心理健康教育具有重要意义。