The effect of number of siblings and birth order on educational attainment: Empirical Evidence from Chinese General Social Survey     

《International Journal of Educational Development》2020

Data from China demonstrate that the effect of the number of siblings on education is restricted by many factors, such as children’s gender, urban or rural household registration, whether there is only one child, the birth order of children within the family, and parents’ status. Chinese families have significant preferences for the eldest son and the youngest son. Moreover, research based on the natural experiment and instrumental variable approach suggests that market-oriented reform of education has increased the cost of family education expenditures since China’s reform and opening up, which further aggravates the negative impact on education of having many siblings in an urban setting.  相似文献   

Schwarz不等式及旋转体侧面积的计算问题     

沈凤英  孙存金 《苏州市职业大学学报》2006,17(4):56-59

文章应用Schwarz不等式的知识,给出了旋转体侧面积计算公式的一个新颖的证明,并同时指出用定积分计算旋转体侧面积时应该避免发生的错误。  相似文献   

不等式multiply from i=1 to n(x_i+1/x_i)≥(n+1/n)~n的简证及再推广     

王静宇  陆旭 《齐齐哈尔师范高等专科学校学报》2002,(3)

i =1∏(xi+xi≥)(n+n)本文给出了不等式的一种简证,并对其进行了推广,同时提出更进一 步的猜想.  相似文献   

Community sport and social inclusion: international perspectives     

Hebe Schaillée  Reinhard Haudenhuyse  Lieve Bradt 《Sport in Society》2019,22(6):885-896

Abstract

This opening article examines the relationship between community sport and social inclusion in research and practice. We discuss the notion of community sport, its multifarious meanings and diverse applications in different parts of the world. We further explore the conceptual and practical links between community sport and different conceptions of social inclusion. In doing so, the article draws together key themes, issues and debates addressed in the collection of articles in this special issue. We conclude by formulating implications and directions for future research and practice.  相似文献   

关于Kelly问题的一个注记     

杨仕椿 《许昌学院学报》2003,22(5):7-9

利用欧氏空间向量内积的性质，对于文[1]中Kelly问题的Wolliam Kruskal猜想证明了m(d，d r)≥√d 3r，并给出了m(2，5)与m(2，6)的最小值．  相似文献   

Greub-Rheinboldt不等式和Polya-Szego不等式的积分形式     

崔光云 《平原大学学报》2005,22(1):111-112

本文给出了Greub—Rheinboldt不等式和Polya—Szego不等式的一种易一一积分形式。  相似文献   

极限入门教学注记     

王亚华  朱军 《郧阳师范高等专科学校学报》2006,26(6):31-33

讨论了尽量利用较高观点处理极限问题和抓住ε-N(ε-δ)定义中N(δ)的本质进行极限入门教学对学习极限,掌握极限的重要性.  相似文献   

构造法解题的具体应用     

林志敏 《郧阳师范高等专科学校学报》2005,25(3):16-17

数形结合是解决各种数学问题的重要思想方法,构造法证明不等式问题的一般方法和具体步骤,突显了构造几何图形法解题的优越性.  相似文献   

证明不等式的几种特殊方法     

杨冲 《铜仁学院学报》2007,1(Z1):44-47

从不等式的结构和特点出发,在已学过的知识的基础上进行广泛的联想,构造一个与不等式相关的数学模型,实现问题的转化,从而使不等式得到证明。本文探讨如何用构造法和柯西不等式法两种特殊方法来证明不等式。  相似文献   

切换系统观测器的设计(英文)     

权胜慧  卫宗礼 《洛阳师范学院学报》2005,24(2):15-17

在本文中,针对具有非线性干扰的切换系统,设计观测器,并且Gronwall引理的运用,使得闭环系统是渐近稳定的.  相似文献