To Math or Not to Math: The Algebra-Calculus Pipeline and Postsecondary Mathematics Remediation

This article reports on a study designed to estimate the effect of high school coursetaking in the algebra-calculus pipeline on the likelihood of placing out of postsecondary remedial mathematics. A nonparametric variant of propensity score analysis was used on a nationally representative data set to remove selection bias and test for an effect among all comparable students and among students least likely to enroll in precalculus, trigonometry, or calculus. The effect failed to reach practical significance among all comparable students and was particularly weak among students least likely to take precalculus, trigonometry, or calculus. These findings suggest that the regression-based results that factor strongly into discussions on high school graduation requirements for mathematics coursetaking contain substantial selection bias.     

出入相补原理及其应用

探究了中国古代数学中的几何奇葩出入相补原理在平面几何、初等代数、初等三角学以及初等微积分中的应用,揭示了代数学以及分析学的直观特征,使抽象的数学在具体的图形中得到新的演绎,为中学数学教育的直观化研究提供参考。     

数学在现代经济社会的应用价值探讨

数学是一门古老而常新的具有高度抽象性和逻辑严谨性的学科,通过对数学所研究的算术、代数、几何、三角、解析几何、统计、概率论、微积分等内容及实践应用范围的探讨,阐述数学在现代经济社会发展的地位和作用,揭示数学的应用价值,提高人们学习数学的兴趣。     

微分在微积分课程中的作用

微分是微积分中的一个基本的重要概念,它是微分学转向积分学的枢纽.其概念和运算在微积分课程中有广泛的应用.如果能从多方面了解这些应用,就会进一步明确微分教学的目的性和重要性,并可使有关内容的教学取得更好的效果.将微分与导数、不定积分、定积分的关系作一定探讨,用以体现微分在微积分课程中的作用.     

情景模拟法在高校微积分教学中的应用——以模拟运动过程为例

本文针对高校微积分教学的对象主要为高校低年级学生的特点,探讨情景模拟法在高校微积分教学中的应用。本文重点选取物理中的运动过程作为基本情景对微积分的基本概念进行分析,分别选取匀速直线运动、匀加速直线运动和变加速直线运动等,通过从微积分角度对它们重新分析,很自然地得出微积分理论中的定积分、不定积分、二重积分等几个问题的基本原理,以此表明情景模拟法在微积分教学中的有效性。     

关于微积分基本定理知识点的教学思考

微积分基本定理是数学分析这门课程的重要定理.本文用统一和联系的观点思考微积分基本定理的教学,包括二重积分和三重积分.这种观点可以很好的帮助学生深刻理解微积分基本定理在数学分析中的重要性,以及加深对这些积分公式的印象并能熟练运用.     

积分上限函数的作用

积分上限函数是一元函数微分学的基本概念。通过对积分上限函数作用的探讨 ,说明了积分上限函数是沟通微分学与积分学之间的桥梁     

高等数学运算法

阐明了微分、导数(分微分)、积分(积微分)的关系及本质,说明了积微分法(积分法)就是变数或无限量的加法,分微分法(微分法)就是变数或无限量的减法.     

THE COMPLEXITIES OF A LESSON STUDY IN A DUTCH SITUATION: MATHEMATICS TEACHER LEARNING

This study combines the Japanese lesson study approach and mathematics teachers’ professional development. The first year of a 4-year project in which 3 Dutch secondary school teachers worked cooperatively on introducing making sense of the calculus is reported. The analysis focusses on instrumental and relational student understanding of mathematical concepts and the transition between the conceptual embodiment and the operational symbolism of the calculus. This paper reports on 2 cycles of lesson studies that took place in the first project year, the first cycle focussing on the notion of the derivative (introduced for polynomials) and the second on trigonometry (as the concepts shift from ratios in a right-angled triangle to functions in the calculus). The lesson study cycles resulted in changes in the teachers’ educational goals and instructional strategies in relation to student understanding. However, the teachers’ desire to be good teachers, their perceived need to prepare students for standard examinations and their reluctance to use computers impeded their progress in developing a lesson study approach. The introduction of a Japanese lesson study approach into a Dutch context merits further reflection in the later years of the project.     

两类积分中值定理的加强

文章对积分第一中值定理的中值进行加强且论证 ,并对积分第二中值定理分别用Abel变换和分部积分两种方法进行讨论     

正交变换在积分中的应用

在用变量替换方法处理多元函数积分学中的某些问题时,习惯上都采用数学分析的方法;它山之石可以攻玉,变量替换的代数方法——正交变换法,也是处理多元函数积分学中某些问题的行之有效的方法。     

二重积分中值定理的逆命题

积分中值定理的命题一般不成立，本文利用函数在一点单调的概念，研究了二重积分第一中值定理的逆命题，给出了逆命题成立的条件。     

关于定积分计算公式的推广

通过对牛顿-莱布尼兹公式条件的放宽,推广了牛顿-莱布尼兹公式的换元积分及分部积分公式.     

用定积分给出函数周期的一种方法

本文用定积分给出了求连续函数周期的一种方法。用此法比用函数周期的定义来解周期相比,避免了解复合函数形式方程的困难。当解定积分形式方程获得周期T值后,再用定义验证即可。     

无穷限广义积分的计算方法及技巧

主要介绍无穷限广义积分的计算方法:直接积分法、换元积分法、分部积分法,无穷限广义积分的基本性质及奇函数、偶函数在(-∞, ∞)上的无穷限广义积分的计算。     

The effects of high school math curriculum on college attendance: Evidence from the NLSY97

Using a sample of youth who graduated from high school in the late 1990s and early 2000s, this paper examines the impact of high school math curriculum on the decision to go to college. Results that control for unobserved differences between students and their families suggest that a more rigorous high school math curriculum is associated with a higher probability of attending college and of attending a 4-year college. The household fixed effect results imply that students who take an advanced academic math curriculum in high school (algebra II or precalculus, trigonometry, or calculus) are about 17 percentage points more likely to go to college and 20 percentage points more likely to start college at a 4-year school by age 21 compared to those students whose highest math class was algebra I or geometry.     

关于不定积分的解题技巧的探讨

不定积分是积分学的基本问题之一,是由一个函数的已知数,去求原来的函数。分析常见不定积分的各种求解方法,结合实际例题加以讨论。     

例谈留数与方程的解

复函数在孤立奇点处的留数的计算往往较复杂,不过对于极点处,可以通过方程的解而求得留数.特别针对于一阶零点,更是有较为初等的留数计算公式,也有较为初等的计算积分的公式.同时,又可以通过计算留数而得出某些常微分方程的解,也有较为初等的解的表达公式.     

利用对称性求定积分性质的推广

积分在微积分学中占有极为重要的地位,它与微分相比,难度大,方法灵活,所以需要掌握一些特殊的积分方法。本文把奇偶函数在对称区间上的积分性质进行推广,得出了一些有用的结论。     

Mathematica7.0计算一元函数微积分

微积分是高等数学教学的重要单元,学生在学习微积分时会接触大量的导数方程、积分和相关演算等知识,理解起来难度很大。文章列举Mathematica软件中对微积分的应用,通过这些应用可以解决学生学习数学时遇到的困难。