High School Students of Color Talk About Accusations of “Acting White”

Fordham and Ogbu (1986) have described fear of acting white as a significant factor that influenced the attitudes and often undermined the achievement of African-American students at Capital High in Washington, D.C. The present qualitative study investigated 38 relatively high-achieving African-American and Mexican-American students in various high schools, public and private, in a midwestern city. The respondents did not report avoiding academic achievement in order to avoid accusations of acting white. Most of the students we interviewed reported no loss of ethnic identity. The students felt strong resentment toward their peers' accusations of acting white and did not seem to be intimidated by the accusations, though they were bothered by the accusations. It would be useful if future research addressed the conditions under which avoidance of acting white is most likely to occur.     

累积法GM(0,N)模型的病态性研究

为了解决GM（0，N）模型中存在的病态性问题，引入累积法对GM（0，N）模型进行了参数估计，给出了新的参数估计公式.该方法避免了采用累加法时复杂的矩阵计算，降低了计算量.利用数乘变换解决了该方法在参数估计中的严重病态性问题，证明数乘变换不改变模型的发展系数及精度.通过实例分析表明累积法GM（0，N）模型是一种值得广泛推广的模型.     

自然资源开发地区产业结构调整的0-1目标规划方法

产业结构调整是自然资源开发地区实现可持续发展的必由之路。为优化投资结构,提高投资效益,从广义资源的角度,在二维度特征分类的基础上,建立了以资源转移和价值提升为基准的0-1目标规划数学模型。针对不同地区的主要矛盾,设计了转型主要参数和目标函数,给出了模型的求解方法和一个应用实例。     

MathCAD在高职数学教学中绘制图形的应用

本文将MathCAD较强的图形功能应用于教学,使教学直观、生动、形象,同时给出了实例的实现过程,在教学中有一定的应用价值。高等职业技术教育是一种全新的高等教学模式,笔者着重论述了利用MathCAD绘制图形,对化解教学难点所起的作用并对非数学专业专科层次高等数学的教学进行探讨。     

The science literacy gap: A Karplus lecture

The great American experiment in mass higher education has failed completely in the sciences, where we have a small educated elite and an illiterate general public. Our graduate education in science is the best in the world, and contrary to the belief of some, we do not face a future shortage of scientists. However, the rest of our educational system is bad enough to constitute a threat to the ideal of Jeffersonian democracy. The Mechanical Universe, a video series produced by Caltech and aimed at high school physics teachers, is described. Although that project has been very successful, much more must be done. The educational infrastructure must be strengthened to the point where science can be taught gradually, throughout the school years and beyond. Furthermore, those of us who are professional teachers of science must become better teachers, both by increasing our own mastery of our subjects and by better understanding the difficulties our students have in learning science.Robert Karplus Memorial Lecture, Seattle, April 8, 1989     

在Powerpoint2003中嵌入电子地图的方法

多媒体课件的优点有利于更好地完成地理课的教育教学任务,Powerpoint是当前人们广泛使用的多媒体课件制作工具,但在地图展示上却有一定局限性。本文介绍了在Powerpoint中嵌入电子地图的两种方法,充分利用MapObjects的功能,进行简单的编程,在Powerpoint中嵌入电子地图,实现多媒体课件与电子地图的有机结合,使电子地图在地理课中的作用得以更好地发挥。     

二十年来我国高校MBO研究综述

对1988～2007年间我国高校MBO的理论和实践研究成果进行了梳理,从目标管理的概念界定以及构成的核心要素、特点、环节、应用的正负效应等方面分析了理论研究和实践研究存在的不足,并指出了进一步研究的方向。     

WBR_0代数的等价刻画

对WBR0代数进行了进一步的研究,得到了WBR0代数与正则剩余格等价的结论,在此基础上给出了WBR0代数的两种等价形式,一定程度上简化了WBR0代数的定义.     

借助Maple讨论y=x^αsin1/x（α∈R）的连续性戈

借助Maple软件,对yn=x^nsin1/x（n=0,1,2,3）进行了分类比较、讨论,给出它们在x=0处及附近的部分分析性质的证明;作出十分直观的示意图,消除以前只能凭空想象的缺陷;并对y=x^αsin1/x（α∈R）和y=x^αcos1/x（α∈R）作了推广、引申：结合实际问题进行了应用讨论．     

《中图法》第四版的"中国法律"标引探讨

文章从《中图法》第四版的“中国法律”分类标引加“000”例证入手,通过分析研究否定了某些偏颇观点,并从《中图法》的整体情况综合考虑,认为应当将中国法律的总论(综合性法规)与分论(专论)的复分区分开,修订某些类目注释的不恰当。文中还采用较典型的实例进行分析、说明、印证,虽然某些文献的标引结果呈现“0000”连续现象,但是实际标引加“0”还只限于“00”。