一个扑克魔术的数学原理

魔术是一门雅俗共赏的艺术．现象让人百思难解,而本质往往很简单,所谓“不识庐山真面目,只缘身在此山中”．     

一种扑克游戏中的数学问题

有一种扑克游戏叫“拖拉机”．从52张扑克牌中（大小王除外）任意抽取3张，若这3张牌的点数相同，则称其为“豹子”；若这3张牌的点数构成3个连续的自然数（包括A，K，Q），则称其为“拖拉机”，其中“A，2，3”3张牌称为“地拖”，“A，K，Q”3张牌称为“天拖”；若这3张牌的花色相同，则称其为“同色”，花色相同的“拖拉机”称为“色拖”．     

扑克中的数学问题

新课程标准的变化告诉我们,在新的世纪,教师应该注重教学方式的改变,为学生创造更好的发挥自身更多优势的条件,关注学生的情感,提供多元的机会．编制一些数学问题．     

一种扑克游戏中的数学问题

有一种扑克游戏叫“拖拉机”.从52张扑克牌中(大小王除外)任意抽取3张,若这3张牌的点数相同,则称其为“豹子”;若这3张牌的点数构成3个连续的自然数(包括A,K,Q),则称其为“拖拉机”,其中“A,2,3”3张牌称为“地拖”,“A,K,Q”3张牌称为“天拖”;若这3张牌的花色相同,则称其为“     

数学建模竞赛的发展与数学建模教师的作用

本文简要回顾数学建模竞赛活动的起源和发展,介绍国内外特别是国外学者关于提高数学建模教学质量的主要观点,并结合作者自身的经验和体会,探讨教师在数学建模教学中的作用。     

一个游戏难题的数学建模与求解

对一个RPG游戏中遇到的难题,通过建立数学模型进行分析,给出了完美的解决方案.     

浅析数学建模

数学建模在数学和其他学科的发展过程中具有重要的意义.数学建模有助于学生感受数学在解决实际问题中的价值和作用,体验综合运用知识和方法解决实际问题的过程;有助于激发学生学习数学的兴趣,培养学生的创新意识和实践能力.数学建模竞赛的开展有力地推动了高等院校数学教学体系、教学内容和教学方式的改革.     

数学实验与数学建模

继数学建模之后 ,一门新的课程——数学实验——引起不少教师的注意 ,本文根据作者的教学实践对数学实验课程的指导思想、内容和方法 ,以及与数学建模课的关系等问题提出一些看法 .     

数学建模素养的内蕴隐喻、建构策略及研究展望

基于深化数学课程改革的视域,采用叙事探究和主题质性文本分析方法,探讨了数学建模素养的内蕴导向和培育策略,提出了数学建模素养的四维内蕴隐喻:鲜活数学经验的积淀、创新思维品质的形成、数学方法论的润泽以及数学观及其学科情感的培育.建议从课程建设、教与学策略和师资优化三个方面构建建模素养培育体系.对当前中学数学建模素养的研究提出了预设性展望,将数学建模研究作为促进与深化数学建模素养培育的一种有效保障.     

数学建模实验的探索

数学建模实验是数学建模教育的继续和发展 ,也是培养高素质创新人才的一条有效途径 ;本文介绍了我们对数学建模进一步发展和深入的思路及近几年在这方面的教学实践和体会 .     

“关灯”游戏的数学建模与求解

对互联网上的一个数学游戏的控制问题,进行了一般性推广,运用数学建模的方法给出了其基于有限域上的线性方程组的数学模型及求解.     

A Mathematical Model of a Pelican Crossing

A simple mathematical model is set up to describe the mode ofoperation of a Pelican crossing. The distributions of timesduring which vehicles may and may not pass through the crossingare established, and the queues of pedestrians and vehicleswhich form are investigated. A limited amount of data has beencollected to estimate the numerical values of the parametersof the model and to check on the validity of the assumptionsmade. It is hoped at a later stage to report on similar investigationsat other types of pedestrian crossings, and to compare theireffectiveness with Pelican crossings.     

Nondominated Equilibrium Solutions of a Multiobjective Two-Person Nonzero-Sum Game and Corresponding Mathematical Programming Problem

With reference to a multiobjective two-person nonzero-sum game, we define nondominated equilibrium solutions and provide a necessary and sufficient condition for a pair of mixed strategies to be a nondominated equilibrium solution. Using the necessary and sufficient condition, we formulate a mathematical programming problem yielding nondominated equilibrium solutions. We give a numerical example and demonstrate that nondominated equilibrium solutions can be obtained by solving the formulated mathematical programming problem.     

Mathematical Analysis of a Soccer Game. Part I: Individual and Collective Behaviors

Detailed time series analysis of a soccer match is given based on the detailed data of the 2D motions of all 22 players and of the ball for the match. The whole analysis includes two parts. In Part I, the individual and collective behaviors of the players of the two teams as well as the motion of the ball are presented as various time series. Geometrical centers, radii, expansion speeds, possession functions of the two teams are defined and calculated as functions of time. Major ranges of all players as well as of different groups of players (defenders, midfielders, forwards) of the two teams during the entire first half, the attacking phase of team A and the attacking phase of team B are calculated, respectively, showing the structures of the two teams during different phases. Distance coverage of each player and the mean distances covered by different groups of players (defenders, midfielders, forwards) during different phases are calculated. The time portions of possession of the ball by each team and the time portions of different phases are also calculated. In Part II, energy and spectral analysis and various correlations will be derived. The relation between various parameters and potential indicators will be discussed. The major purpose of the present study is to offer some general mathematical tools for the detailed analysis and to reveal some general features of soccer match when the detailed 2D data are available. The results would offer the raw materials for various potential indicators which may eventually be used in the coaching process to enhance the performance and in the prediction of the results of soccer matches.     

A Mathematical Study for a Rotenberg Model

This paper deals with a mathematical model in cell dynamics population originally proposed by M. Rotenberg (1983, J. Theoret. Biol.103, 181-199). Individual cells are distinguished by their degree of maturity and maturation velocity. Here, all biological rules are considered. We bring new techniques to the discussion of this model. We show that the model is well posed in the sense of the theory of semigroups, we study the positivity and irreducibility of the generated semigroups, and we calculate its essential type. The asymptotic behavior is obtained in uniform topology.     

Calibration of a Mathematical Model for Urban Planning

The operational value of the mathematical models used in regional or urban planning is mainly dependent upon the possibility of adequate calibration so as to make them actually represent the social and economic problem under study. In this paper we give a formulation of the calibration problem for a singly constrained exponential model, use it to calibrate a specific model that is actually being used to plan the development of a large Italian town, and obtain results that improve by about 30% a standard currently used calibration procedure.     

一种梅毒模型的稳定性分析

根据人类感染梅毒的方式建立了一种新的数学模型,整个人口被分成四个组:注射吸毒者,女性性工作者,性工作者的客人以及MSM人群.通过对模型的研究和分析得到了模型的基本再生数R_0,还进一步研究了平衡点的存在性和稳定性,当R_01时,无病平衡点是全局渐近稳定的,疾病将会被消除;当R_0 1时,疾病是一致持续的而且给出了地方病平衡点全局渐近稳定的充分性条件,疾病将持续流行.