基于几何直观的微积分教学内容改革探索

探讨一种新的教学理念.以培养好学,善学,勤学的学生为目标,提高学生学习兴趣为出发点,改革教学内容为手段,提出改革微积分教学内容和方法的具体知识点,增加相应知识点的几何直观性,提高学生的课堂思考能力,活跃课堂教学,体验数学美感,培养创新思维,克服微积分抽象难于理解的难题.     

BIFURCATIONS OF TRAVELLING WAVE SOLUTIONS IN VARIANT BOUSSINESQ EQUATIONS

The bifurcations of solitary waves and kink waves for variant Boussinesq equations are studied by using the bifurcation theory of planar dynamical systems. The bifurcation sets and the numbers of solitary waves and kink waves for the variant Boussinesq equations are presented. Several types explicit formulas of solitary waves solutions and kink waves solutions are obtained. In the end, several formulas of periodic wave solutions are presented.     

IMPROVED RANDOMIZED ALGORITHM FOR THE EQUIVALENT 2-CATALOG SEGMENTATION PROBLEM

An improved randomized algorithm of the equivalent 2-catalog segmentation problem is presented. The result obtained in this paper makes some progress to answer the open problem by analyze this algorithm with performance guarantee. A 0.6378-approximation for the equivalent 2-catalog segmentation problem is obtained.     

一类变形的Boussinesq方程组的行波解分支

在Boussinesq方程组求解方面,用平面动力系统的分支理论研究了一类变形的Boussinesq方程组的行波解分支．得到了不同参数条件下的分支集、相图及所有孤立波和扭波的精确公式．     

三种变形调和级数的收敛性

给出了三种变形调和级数,证明了相应的收敛性,并给出了其收敛值的计算方法.