关于图的分数k-因子存在性的一些结果

设g(x)≤f(x)是定义在V(G)上的两个整数值函数,h(e)∈[0,1]是定义在图G的边集E(G)上的函数。令dGh(x)=移e∈Exh(e),其中Ex={xy:xy∈E(G)}。若对所有的x∈V(G)都有g(x)≤dGh(x)≤f(x)成立,称h是G的一个(g,f)-表示函数。Gh是图G的一个支撑子图使得E(Gh)={e:e∈E(G),h(e)≠0},则称Gh是G的一个分数(g,f)-因子。文章给出,若对V(G)中的任意两个顶点u和v,G-{u,v}有分数k-因子存在。则G有一个分数k-因子不含图G中任意给定的边e∈E(G);当G有分数1-因子F=Gh存在时,对任意e∈F,G-V(e)有分数k-因子存在,则G有分数k-因子。     

广义Kautz有向图GK(3,n)的反馈数的界

对于给定的图G的顶点集的子集F,如果删除F使得剩余子图是无圈子图,则称子集F为图G的反馈点集。研究了广义Kautz有向图GK(d,n)的反馈点集。令f(d,n)表示广义Kautz有向图GK(d,n)的所有反馈集合中顶点个数最少的集合的个数(即广义Kautz有向图GK(d,n)的反馈数),给出了GK(3,n)的反馈数的上界,即 f(3,n)≤n+5n8 － 3n4－ 4n7+3。     

机组最优负荷分配中等微增率法的分析及其算法的改进

一、问题的提出给定n台机组,各机组燃料费特性曲线已知为 f_i(p_i)=a_ip_i~2 b_ip_i c_i (i=1,2,…,n)其中a_i,b_i,c_i均为正的常数。各机组上、下限出力为Pimin,Pimax。(i=1,2,…,n)。给定负载荷P_R在n台机组间进行经济负荷分配,可表述为如下数学规划问题: 目标函数:F(p_R)=sum from i=1 to n(a_ip_i~2 b_ip_i c_i)→min (1—1) 满足约束条件:sum from i=1 to m P_i=P_r (1—2) P_(imin)≤P_i≤P_(imax) (1—3) 以上规划问题简称规划A,目前常用的求解该规划的等微增率法,简称算法Ⅰ。其计算框图见文献[2]。     

两个多色顶点Folkman数的界*

对于正整数a1,a2,…,ar以及无向简单图G, 当且仅当对G的任意一种顶点r着色,都对某个i∈{1,2,…,r}存在顶点都着有颜色i的ai阶的完全子图, 则记G→(a1,a2,…,ar)v。对于k＞max{a1,a2,…,ar},顶点Folkman数定义为Fv(a1,a2,…,ar;k)=min{｜V(G)｜:G→(a1,a2,…,ar)v,KkG}。借助于计算机 得到了18≤Fv(2,2,2,3;4)≤Fv(2,3,3;4)≤30。     

可数无穷多极值点复映射族计算机图形化研究

用超越复映射F(z）＝e^w c构造出含有单参数w(w≠0或1）的牛顿变换族fw(z)z-1/wz^w-1模型,fw(z)有可数无穷多个极值点,提出了构造参数w的有效极值点集vcps={zk｜-π＜arg(zk)≤π,f^′w(zk)-0,k｜∈X,zk∈C}方法,用参数平面上vcps中所有极值点的轨道有界的参数w构造了fw(z)的广义M集,同时用参数平面上vcps中第n个极值点的轨道有界的参数w构造了fw(z）的MF,Ms和Mo广义M集,分析了不同的参数下fw(z)的动力学特性,根据动力平面上点的轨道被参数w极值点的吸引轨道的吸引时间,构造了大量的新颖的充满J集图像。     

如何将多个规则存储于一个模糊联想记忆矩阵中

Kosko的模糊联想记忆（FAM）神经网络得到了广泛的应用,然而却受到了低存储量的限制。Chung和Lee建立了一个矩阵存储多规则并能正确回忆的定理。基于这个定理,FAM模型的硬件及计算量需求能够显著地减少。但是,使用这个定理必须满足一个前提条件,即Xi(a) Xi(a)≤1,其中a=1,2,...,n,在这篇论文中,证明Chung和Lee的定理可以推广到连续的情形,提出了一个新的方法,这个方法即使在Xi(a) Xi(a)≤的情形下也是有效的,并且存储量可以进一步降低,更有利于大规则库系统的应用。     

笔记本进入BIOS的方法

Thinkpad(冷开机按F1,部分新型号可以在重新启动时按F1) HP(启动和重新启动时按F2) SONY(启动和重新启动时按F2) Dell(启动和重新启动时按F2) Acer(启动和重新启动时按F2) Toshiba(冷开机时按ESC,然后按F1) Compaq(开机到右上角出现闪动光标时按F10,或者开机时按F10) Fujitsu(启动和重新启动时按F2) 绝大多数国产和台湾品牌(启动和重新启动时按F2)     

一种新的H∞-优化方法:梯度方法

提出一种灵活、有效的H∞-优化方法:梯度方法.利用H∞-范数与状态空间实现的关系, 定义了目标函数ρ(ε,F),ρ(ε,F)与H∞-范数之间的关系是: limρ(ε,F)=1/‖T(s,F)‖∞ ε→0 分析了ρ(ε,F)的可微性,并给出了ρ(ε,F)/F的具体表达式以及使ρ(ε,F)极大化的梯 度方法,从而导致‖T(s,F)‖∞的极小化.实例表明,梯度方法能有效地使ρ(ε,F)上升,并 收敛于驻点或终止于不可微点.     

环F_4+vF_4上的Gray映射

定义了从F4 vF4到子环F4和F2 vF2上的两个线性Gray映射φ和Ψ,并证明这两个Gray映射都是保持正交性不变的;进一步定义了环F4 vF4上的Lee-重量和Euclidean-重量,并证明Gray映射φ和Ψ是保持Lee距离不变的;最后给出了(F4 vF4)n、(F2 vF2)2n、(F4)2n和(F2)4n相互之间的关系图.     

(F,F-)-信息的辨识-过滤

P-集合（packet sets）具有动态特性,它是由内P-集合XF与外P-集合XF构成的集合对(XF,XF)。基于具有内动态特性的信息系统,应用内P-集合,提出(F,F-)-信息概念;讨论(F,F-)-信息的辨识与过滤。给出(F,F-)-粒度与(F,F-)-过滤系数概念,得到(F,F-)-信息辨识方法与辨识准则,以及(F,F-)-信息过滤定理与过滤准则,并给出(F,F-)-信息的辨识-过滤应用。(F,F-)-信息辨识与过滤的讨论结果为研究具有内动态现象的信息过滤-发现提供了一种新方法。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.