非齐次偏微分方程混合问题的形式解

通过待定函数法给出了非齐次偏微分方程混合问题的形式解，从数学角度说明了齐次化原理．     

任意流场中颗粒运动方程的通解(英)

给出了任意流场中颗粒运动方程的无因次和线性微分方程形式．估计了颗粒运动方程中的一些相关项．借助于一些数学推导和处理，求得了比线性颗粒运动方程的通解．     

一个三元不等式及其应用

在数学解题中,经常会遇到三个正数的不等式的证明问题,对这类问题,不少同学感到思维难度较大,解题过程复杂,本文介绍一个简单又平凡的不等式,并给出它的应用．     

介绍一种解题思路

介绍一种解题思路宋光（江西萍乡三中３３７０００）经过一定时间的学习，人们积累了许多数学知识和解题经验，形成了良好的思维习惯，遇到新的数学问题时，便能快速准确地确定解题的大趋势．笔者将这种解题的大趋势称之为思路简索．解题时若能根据解题需要，深入挖掘和利...     

美学原则下双曲线的几个定理及应用

美的追求是数学发展的动力之一，当我们用美的观点去考虑对象、思考问题时，就可以形成数学思维的美学方法和解题策略，得出不寻常的美不胜收的解题方法．文[1]给出了什么样的点才使双曲线存在以其为中点的弦的一个结论，受其启发，笔者以形式美的观点探索了几个定理．     

常微分方程解题模式的构建

为了解决常微分方程教学实践中出现的“断点”问题．在Polya解题观和建构主义学习观的指导下,结合大学常微分方程知识特点,提出基于Polya解题观的常微分方程解题模式。实践表明,本模式对于提高常微分方程教学效果和学生的学习效率具有一定的理论和实践意义．     

源于概念的病题、错解

美国大数学家波利亚对数学解题过程进行了深入研究，给出了极具启发性的“怎样解题”表，认为解题过程分可为四个阶段：弄清问题、拟定计划、实现计划、回顾．并提醒在拟定计划过程中一旦陷入困境的几种解决方法，其中一种方法就是回到定义．解题的麻烦可能是由于没有充分理解问题中那些基本词句的意义而引起的．     

辩证思维话解题

同学们知道，数学中充满了各种矛盾，如运算中有加与减、乘与除、乘方与开方等．有矛盾的地方就有辩证法存在，利用辩证的思想方法去寻觅一个数学问题的解题思路，是解决问题的常见方法．本文拟择取一些比较典型的辩证思维方法，以介绍它们在解题中的具体应用．     

把“解题研究”推上一个新的台阶──兼评《高中数学解题方法与技巧》等“解题研究”著作

把“解题研究”推上一个新的台阶──兼评《高中数学解题方法与技巧》等“解题研究”著作杨之“问题是数学的心脏”这是哈尔默斯的肺腑之言．数学研究、数学学习都离不开解题．因此，“解题教学”理应是数学教学和研究的中心．事实上，自八十年代以来，我国在解题研究方面...     

概率计算教法探索

依据作者多年的教学经验，介绍了在概率论与数理统计教学中．如何根据非数学类专业学生的特点，讲授概率计算的三种方法，即基本公式法、程序解题法、转化法和流程图辅助解题法．特别是流程图辅助解题法对帮助学生如何解决一些复杂的概率问题能起到有效的提示解题思路的作用．     

RECENT PROGRESS ON SPHERICAL HARMONIC APPROXIMATION MADE BY BNU RESEARCH GROUP ——In memory of Professor Sun Yongsheng

As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years （2001-2005）. The main topics are： convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.     

A unified approach to certain problems of best local approximation

In this paper we study best local quasi-rational approximation and best local approximation from finite dimensional subspaces of vectorial functions of several variables. Our approach extends and unifies several problems concerning best local multi-point approximation in different norms.     

Boundedness for commutators of multipliers on Hardy type spaces

In this paper, we study the commutators generalized by multipliers and a BMO function. Under some assumptions, we establish its boundedness properties from certain atomic Hardy space Hb^p（R^n） into the Lebesgue space L^p with p 〈 1.     

Towards Excellence in Science Chinese Academy of Sciences

<正>May 26,2014,Beijing Science is a human enterprise in the pursuit of knowledge.The scientific revolution that occurred in the 17th Century initiated the advances of modern science.The scientific knowledge system created by     

THE 8~(th) INTERNATIONAL CONGRESS ON INDUSTRIAL AND APPLIED MATHEMATICS

<正>August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists     

Bounds for the zeros of polynomials

Let P(z)=∑↓j=0↑n ajx^j be a polynomial of degree n. In this paper we prove a more general result which interalia improves upon the bounds of a class of polynomials. We also prove a result which includes some extensions and generalizations of Enestrǒm-Kakeya theorem.     

Boundedness of commutators related to Marcinkiewicz integrals on hardy type spaces

In this paper, the authors study the boundedness of the operator [μΩ, b], the commutator generated by a function b ∈ Lipβ(Rn)(0 ＜β≤ 1) and the Marcinkiewicz integrals μΩ, on the classical Hardy spaces and the Herz-type Hardy spaces in the case Ω∈ Lipα(Sn-1)(0 ＜α≤ 1).     

Jacobi polynomials used to invert the laplace transform

Given the Laplace transform F(s) of a function f(t), we develop a new algorithm to find an approximation to f(t) by the use of the classical Jacobi polynomials. The main contribution of our work is the development of a new and very effective method to determine the coefficients in the finite series expansion that approximation f(t) in terms of Jacobi polynomials. Some numerical examples are illustrated.