对称区域上的二元对称函数的积分性质

导出了把一元定积分中奇、偶函数在关于原点的对称区间上的积分性质推广到在对称区域上的二元对称函数的二重积分的情形。     

Students' Understanding of the Library of Congress Call Number System

Students' ability to effectively understand and use call numbers to locate materials in the library is still an important skill in the digital age. This study explores students' perceptions of Library of Congress call number schemes and identifies the conditions that impede or facilitate students' successful location of desired library materials. Using a multiple case study design, this article describes the perceptions of undergraduate students who attend a 4-year public university in the Midwest. The findings suggest that students demonstrate little facility for locating books easily and independently, misinterpret call numbers in diverse ways, and do not fully understand the library's organization of materials.     

数系结构的探索与发展

数系是数学中最基本的对象.但最早发展的自然数的基础却迟至19世纪才建立,完整的数系本质结构的认识也经历了一个多世纪.本文从数系结构的探索与发展过程阐述了数学发展的基本特征与规律.     

对复整数集Z[i]中高斯定理的注记

本文主要是对Z[i]中的高斯定理做了进一步的讨论,给出了满足p=a_1~2 a_2~2中的a_1,a_2的求法,并指出了其中的a_1~2,a_2~2是被p唯一决定的一对数,同时还给出了适合p~2=a~2 b~2中的a,b的求法,其中,p为奇素数,且适合p≡1(mod 4)。     

The Origin of Language and its Link with Music according to the Theory of Jābir ibn [Hdot]ayyān

Jābir ibn [Hdot]ayyān took advantage of the vast translation enterprise of Greek scientific works into Arabic. He quotes from these sources, including several whose Greek originals are lost. His works can be likened to the encyclopedia of Ikhwān al-[Sdot]afā’, the most important transmission of Pythagorean tradition. In this Epistle on Music the Ikhwān followed Jābir's method, and perhaps were influenced by him, in analysing the relationship between language and music, together with the arithmetical speculations that were widely influential. In this article, I have attempted to collect Jābir's scattered ideas on the origin of language and music trying to assemble the major ones in a coherent exposition.     

在VFP环境下实现随机编号的一种实用方法

主要介绍了在设计开发"三明市中职招生管理系统"过程中,学生准考证号随机生成的一种实用方法。     

析《中国图书馆分类法》类目复分加"0"时的隐性重号现象

从类目复分加"0"研究概况和加"0"的作用出发,通过<中国图书馆图书分类法第三版使用手册>和<中国图书馆分类法>(以下简称<中图法>)第四版的实例,对能发现的隐性重号现象进行分析,指出解决此问题的对策是严格遵守加"0"规则.     

等幂和的一种新方法

前ｎ个自然数的方幂和,Σｉ＝１ ｉ＾ｍ（简称等幂和）是一个古老的难题。从著名的Ｅｕｌｅｒ－Ｍａｃｈａｕｒｉｎ定理出发,给出了任意一个等差列方幂和公式,更一般地得到了等幂和的计算公式。     

碳环化合物中氢原子个数的确定方法

有机碳环化合物的组成通常用碳架结构来表示,但有时又必须写出其化学式,在二者的转化过程中,往往在确定氢原子个数时出错.本文介绍两种确定有机碳环化合物分子中氢原子数的方法.     

Making Sense of What Students Know: Examining the Referents, Relationships and Modes Students Displayed in Response to a Decimal Task

Written tasks that request an explanation can offer detailed information concerning students' knowledge to the classroom teacher. The examination of students' written responses for the mathematical systems that are employed (referents), the connections that are displayed (relationships) and the communication methods that are utilized (modes) provides evidence that suggests how the student is making sense of a problem. The purpose of this article is to describe the constructs of referents, relationships and modes and to illustrate how these constructs may be reflected in students' written responses to a decimal task that requests an explanation. This article will also examine sets of responses from two classrooms using the proposed framework to illustrate the type of information that teachers may acquire through the application of this framework. This revised version was published online in July 2006 with corrections to the Cover Date.