跳绳对中学生肺活量的影响

很多体育项目可以改善呼吸系统的循环,跳绳是其中的一项,通过长时间的跳绳运动可以提高肺活量的成绩。以初二(3)班学生为研究对象,经过一年有计划的训练,把他们训练前和训练后肺活量的测试成绩采用SPSS13.0软件系统进行统计处理,结果显示:训练前和训练后他们肺活量的综合成绩有显著性的差异。实验证明:长时间的跳绳练习对中学生肺活量的提高有一定的影响。     

FDI技术溢出对制造业创新能力的影响——基于吸收能力的中介作用

选取2008—2016年中国制造业15个行业的面板数据,通过内生经济增长模型验证FDI技术溢出效应是否存在,并建立基于吸收能力的中介作用的结构方程模型,验证FDI对制造业创新能力的影响。实证研究结果显示,(1) FDI对我国制造业存在显著的正向技术溢出效应;(2) FDI技术溢出对我国制造业的创新能力产生显著的正向影响;(3)吸收能力在FDI技术溢出影响创新能力的过程中发挥着重要的中介作用。     

自然资源、人力资本与区域创新能力

利用中国2000-2015年30个省市的数据,基于空间面板计量模型,研究了自然资源丰裕度、人力资本对区域创新能力的影响。研究表明：(1)自然资源、人力资本和区域创新能力各指标变量都通过了莫兰检验,存在空间关联性,模型的最佳形式为固定效应下的空间杜宾模型;(2)丰裕的自然资源不利于提升区域创新能力,即存在创新资源诅咒,而人力资本积累有助于提升区域创新能力,控制变量人均GDP增加和人均财政科技支持有利于区域创新能力的提高,但FDI对区域创新能力的影响不显著;(3)临接矩阵、反距离矩阵和社会经济权重矩阵下SDM各变量空间效应都表明,自然资源丰裕度不仅降低了本地区的创新能力水平,和其他省市的创新能力水平也显著负相关。平均受教育年限有利于本地区创新能力的提高,但抑制其他省市创新能力水平。控制变量方面,FDI对本地区创新能力提高影响不显著,但促进临近地区创新能力的提高。人均GDP增加提高了本地区的创新能力,但抑制其他省市的创新,人均财政科技支出增加有利于本地区和临近省市创新能力的提高。     

Primary and secondary curriculum development in Afghanistan

The article analyzes curriculum processes and products pertaining to the overall reconstruction of Afghanistan’s education system after 2002. With the support of several international agencies, including UNESCO’s International Bureau of Education (IBE), as well as non-governmental organizations (NGOs), Afghanistan’s Ministry of Education succeeded in making important progress with regard to quality education, curriculum planning and design. Based on a careful analysis of needs, new curriculum frameworks for primary and secondary education were developed over the period 2002–2006, and syllabuses and textbooks for primary and secondary education will be developed and disseminated in schools across the country. However, many challenges remain to be tackled, especially with regard to the dissemination of a new curriculum culture and the writing, printing and distribution of quality syllabuses and textbooks at all education levels. The article highlights both the achievements and the obstacles standing in the way of comprehensive curriculum reforms taking place in the difficult context of reconstructing a cohesive societal infrastructure in a country, such as Afghanistan, that is affected by conflict.

《电路分析》课程教学方法探讨

《电路分析》课是电类专业的专业基础课,通过在教学过程中注重基本概念和基本定律的理解、课程体系中适当增大实验课比例、教学内容突出实践性、适当拓宽学生知识面等教学方法的改进,激发学生的学习兴趣、增强实践动手能力,为后续各专业课的学习奠定重要的基础。     

多输入多输出系统信道容量研究

本文讨论了在信道矩阵是独立的复高斯变量,按照这种理想环境推导出MIMO信道容量,最后通过对几种信道进行分析得出MIMO系统可以大大提高系统的信道容量。     

Seismic performance evaluation of steel frame-steel plate shear walls system based on the capacity spectrum method

This paper presents some methods that the standard acceleration design response spectra derived from the present China code for seismic design of buildings are transformed into the seismic demand spectra, and that the base shear force-roof displacement curve of structure is converted to the capacity spectrum of an equivalent single-degree-of-freedom （SDOF） system. The capacity spectrum method （CSM） is programmed by means of MATLABT.0 computer language. A dual lateral force resisting system of 10-story steel frame-steel plate shear walls （SPSW） is designed according to the corresponding China design codes. The base shear force-roof displacement curve of structure subjected to the monotonic increasing lateral inverse triangular load is obtained by applying the equivalent strip model to stimulate SPSW and by using the finite element analysis software SAP2000 to make Pushover analysis. The seismic performance of this dual system subjected to three different conditions, i.e. the 8-intensity frequently occurred earthquake, fortification earthquake and seldom occurred earthquake, is evaluated by CSM program. The excessive safety of steel frame-SPSW system designed according to the present China design codes is pointed out and a new design method is suggested.     

金属热容量的研究

文章对金属热容量的经典统计理论、爱因斯坦理论、得拜模型理论进行了讨论,最后利用得拜模型理论,同时计及电子气体对金属热容量的贡献,使统计理论得到的结果能很好的解释实验结果.     

中小学教师教育技术能力培训质量保障体系初探

构建中小学教师教育技术能力培训质量保障体系,是提高培训质量的基础和前提条件。文章从近几年笔者参加的四川省中小学教师教育技术能力培训实际出发,分析影响中小学教师教育技术能力培训质量的主要因素,构建了以评价和培训过程监控为核心的质量保障体系。     

Re-designing Science Pedagogy: Reversing the Flight from Science

This article takes as its starting point the ongoing downturn in student interest in, and engagement with, the enabling sciences. We make a case that embedding of creative pedagogies in science education has significant potential to arrest the flight from modern science. Five propositions are explored in order to argue the case: that young people are more engaged by active tasks than with a passive consumption approach to transfer of core knowledge; that it is boredom, not rigour, that disengages them––the difference is between static and dynamic sources of knowledge; that creativity is not the antithesis of scientific rigour but the core business of scientific thinking; that we now have new understandings of creative pedagogies that make teaching strategies visible and effective; and, that these strategies can build academic, digital and social capacity simultaneously and this is the new core business of the science educator. We conclude by flagging implications for leading such pedagogical change in science faculties.