人类科学中现有经典极限论的终结(Ⅲ)

进一步揭示、分析由于经典无穷观和经典数谱的缺陷所导致的存在于经典极限论中一个很隐蔽的逻辑矛盾,综合分析芝诺悖论家族和贝克莱悖论家族所揭示的问题的本质,得到明确的结论:(1)经典无穷理论体系、经典数谱和经典极限论这三大基础理论中所存在的缺陷导致了芝诺悖论家族和贝克莱悖论家族的产生,所以由这两大悖论家族从不同角度所揭示的所有难题在现有科学理论体系中是不可解的;(2)经典无穷理论体系、经典数谱和经典极限论中所存在的致命缺陷决定了人类科学中经典极限论的终结.     

智能网号码携带业务的研究

从上个世纪末到本世纪初，智能网技术得到了迅猛发展和广泛应用，它不但给成千上万的用户带来方便，而且为运营商带来了无限商机。本文以如何使用智能网技术实现号码携带业务为例，系统地介绍了智能网技术运用方法。     

关于联图P_n∨C_n的邻点可区别的均匀全染色

一个图G的全染色被称为邻点可区别的如果满足图G中任意两个相邻点所关联的元素所染的色的集合不同.一个图的邻点可区别的全染色被称为均匀的如果满足任意两色所染元素的数目之差的绝对值不超过1.本文研究了联图P_n∨C_n的邻点可区别的均匀全染色并证明它满足邻点可区别的均匀全染色猜想.     

漳州明代状元林震的《墓志铭》与《行状》

有关明朝状元林震的生平资料,过去所知甚少。最近从福建省南靖县船场镇星光村鼎寮社林春荣先生保存的《泰昌堂西河弘仕祖派族谱》中,发现了《林震墓志铭》和《行状》。林震生于洪武二十一年(1388年)七月一日,卒于正统十三年(1448年)六月十一日,1439年致仕。     

如何讲好“实数理论”

:本文探讨如何讲好“实数理论”。从实数集的完备性的公理出发到讲解“实数理论”的一系列定理及用这些定理证明的后继定理都应该突出“实数集的完备性”。使学生能抓住事物的本质 ,深刻理解“实数集的完备性”是《数学分析》的理论基础     

二维联系数及其应用

从系统工程可靠性出发,我们用一种新型的系统分析理论——集对分析,提出集对分析的二维联系数以及其性质,并利用二维联系数的性质探讨系统工程中串联与并联的可靠度的计算公式,从而比较简单方便地解决了系统工程中关于串联与并联的可靠性的问题．     

Physical activity in the lifestyle of Czech university students: Meeting health recommendations

Abstract

The decline of physical activity (PA) in adults as well as children and youth is a worldwide phenomenon. The aim of this study is to analyse the amount of PA in Czech university students' daily lives. The research on university students was conducted as part of nationwide research on PA in the adult population of the Czech Republic. A total of 906 students at eight selected universities were asked to participate in this study. The response rate was 79.5%. We analysed data from 641 university students: 318 male [mean age 21.63±1.73; mean Body Mass Index (BMI) 23.50±1.91] and 323 female (mean age 21.08±1.53; mean BMI 21.23±2.20). The students wore Yamax SW-701 pedometers continuously for seven days. With respect to BMI, the recommendation of 10,000 steps per day on an average day was met by 76% of men and 68% of women of normal weight, 67% of male students who were overweight or obese and 85% of female students who were overweight or obese. Of all monitored days, in both females and males, the number of steps taken on Sunday was significantly lower (p<0.0001) in comparison to other days of a week. No significant differences were found in the number of steps taken among students of normal weight, students who were overweight and students who were obese on any of the monitored days. The majority of Czech male university students are of normal weight. Only 9% of students meet the criterion of 10,000 steps every day. Approximately two-thirds of students meet the 10,000 steps daily criterion on four or more days per week. The lowest number of steps is taken on Sundays; this finding supports the need for intervention programmes to enhance PA on weekends.     

基于正则表达式的协议识别方案

随着网络服务大量使用随机端口号,传统的基于端口号的协议识别方法不再适用。设计了一种基于正则表达式的协议识别方案。将NFA匹配引擎转换为DFA匹配引擎,提出了构造最优DFA状态数的算法,该算法保证在任意有限的系统资源下具有最小的时间复杂度和空间复杂度。     

中国、印度计算机科学领域论文影响力的比较研究

文章以1999-2008年Science Citation Index--Expanded为数据来源,从发文数量、被引频次、发文期刊的时间分布、期刊影响因子、被引频次等方面对中国和印度两国在计算机科学领域内论文的发文情况进行了比较研究。     

Let’s Draw a Picture

In an undergraduate analysis course taught by one of the authors, three prompts are regularly given: (i) What do we know? (ii) What do we need to show? (iii) Let’s draw a picture. We focus on the third prompt and its role in helping students develop their confidence in learning how to construct proofs. Specific examples of visual models and their impact on student work are presented.