Changing Science Outcomes: Cognitive Acceleration in a US Setting

Inquiry is seen as an integral part of science education in the USA; however, few American science programs explicitly focus on the higher order thinking skills that are the precursors to inquiry. In this paper, Australian researchers report the result of using a version of the Cognitive Acceleration through Science Education (CASE) program in a school district in Oregon (USA) to address teacher-identified concerns about student competence in scientific inquiry. The substantial effect of CASE on British children’s cognitive development and scholastic achievement has been demonstrated convincingly since its inception in the United Kingdom in 1981. The Oregon CASE project was not a mere replication of the original British CASE research: different instruments were employed, and both the measures of cognitive level and student achievement were Rasch-calibrated. The Oregon CASE teachers received comparatively less professional development than did their British counterparts. Neither did they deliver the entire intervention. The results of the study suggest that many of the benefits of CASE still apply when the intervention is conducted in a sub-optimal setting. Cognitive growth was apparent in participating students and high correlations were found between cognitive level and results in some state-mandated tests.     

质点沿水平转盘任一弦运动时加速度的推导

水平转盘以匀角速ω转动，一质点沿盘的直径以匀速率ｖ’作相对运动，在惯性系中考查质点的运动，发现有科里奥利加速度存在。这是一般教科书中常用的手法。本文则从质点沿任一弦这动的情况来引出此项加速度。     

英语学习巧迁移

学习迁移有正负两方面的作用,在母语以外的语言学习中体现尤为明显。语言迁移既包括语间迁移,也有语言内部迁移。在英语学习中,注意引导学生充分利用各种形式的正迁移,防止汉语学习中许多负迁移对英语学习的阻碍作用至关重要;同时,还要引导学生利用好先行学习对后续学习的正迁移作用。     

对外直接投资与母国产业升级的理论分析

分析了发展中国家跨国公司流出FDI提高母国产业竞争力的四种具体途径,认为从提高产业竞争力到产业重组是实现母国产业升级的必经之路,提出了我国发展对外直接投资,促进产业升级的具体途径。     

椭圆规上质点运动与人造卫星运动异同的分析

椭圆上某质点P的椭圆轨迹,其径向加速度恒指椭圆中心。而以椭圆轨迹运行的人造地球卫星,其径向加速度恒指向地球,但地球并非在该轨迹的中心,而是椭圆轨迹的焦点处,两者有相同之处,又有质的差别。本文将通过简单的微、积运算,分析其异同。     

Durand-Kerner算法的5阶加速

基于Durltnd—Kemer算法结构，构造了新的同时求解多项式根的并行算法，且证明了该算法当多项式只有单根时，其收敛阶为5．     

关于速度、加速度与位移之间标量关系的探讨

在不同几何空间中讨论了速度、加速度与位移三者之间的标量关系,对于加深物理概念的理解具有帮助作用.     

Shaking Table Test on Out-of-Plane Stability of Infill Masonry Wall

The behaviors of infill wall in earthquakes show that infill masonry walls,which are used as nonstructural elements of concrete frames,are vulnerable when they are subjected to earthquake.In order to achieve an optimal antiseismic behavior,or even stability,two methods of connection are investigated.The shaking table tests,with 1:3 scale walls of two-storey model subjected to horizontal earthquake loads,were carried out to investigate the out-of-plane behaviors with different connections between walls and beams.The test results show that the connection methods employed between walls and beams have a significant effect on the out-of-plane stability of infill walls.The walls bound by bars with the beams perform better than those with inclined bricks without gaps.     

拓展训练模式教学法在化工管路拆装实训中的探索

在高职化工类专业的实践教学活动中引入拓展训练模式,挖掘个人潜能,提高团队精神,培养出企业所需要的高素质人才,尽可能做到与企业"无缝接轨",笔者在化工管路拆装实训实践教学活动中,尝试性的探索了拓展训练模式教学法,提高团队凝聚力,培养学生的合作意识和团体精神,收到了一定的效果。     

狭义相对论中各变换式的重新推导及合理性分析

鉴于狭义相对论的不自恰性,对整个理论体系存在的两处失误进行了修正,使之在符合现有实验的基础上,与经典理论达到融合。首先指出导出洛仑兹时空变换式的原始数学模型存在缺陷,对其修正后,重新推导出了新的洛仑兹时空变换式。其次对力的定义进行了严格分析,据此导出两惯性系间的力变换式,简洁明了。对比新旧变换式(推论),阐述了旧变换式存在的不合理之处和新变换式的合理性。