构造辅助函数在微积分证明中的应用

微积分中中值定理的证明应用是一个难点,构造辅助函数是证题常用的手段之一,本文主要介绍构造辅助函数的三种方法：作差法、观察法和不定积分法。     

中国画论视野中的油画创作教育

“外师造化,中得心源”是中国绘画理论审美意象创作的一种高度概括,是一个统一的过程。在这个过程中创造性的想象起着很重要的作用,中国当代化创造应对本国化有深入的了解,青年油画创作要不断地训练创造性的想象,为创造能够体现先进化发展方向的具有鲜明的民族特色、饱满的时代精神和真诚的个性创造的中国油画艺术而努力。     

高速公路高填方路段变形观测研究

本介绍了高速公路高填方路段的变形观测工作,并对变形观测的必要精度、控制网的布设方案及路基沉降位移的规律进行了探讨,其研究成果对其他高速公路也有一定的参考价值。     

中国古代工匠美术教育方法探究

古代工匠美术教育属于早期职业教育的范畴,它对古代技术型人才培养、社会经济的发展以及工艺美术的巨大成就起到了不容忽视的作用。我国古代工匠美术教育虽然不同于现代教育,从其本身的特点出发,形成了一系列行之有效的教育方法。古代工匠美术教育中师傅的"教",是具有"口传心授"特征的非课堂教学及以粉本、画谱、工艺美术著作为媒介的物传式教育。古代工匠美术教育中徒弟的"学",主要是观察模仿学习、实践性学习、自主性学习。     

Making the Case for Early Identification and Intervention for Young Children at Risk for Learning Disabilities

The early identification of children with learning disabilities (LD) is difficult but can be accomplished. Observation of key behaviors which are indicators of LD by preschool and kindergarten teachers can assist in this process. This early identification facilitates the use of intervention strategies to provide a positive early experience for children at risk for academic difficulties.     

Building the field’s knowledge of teaching and learning: Centering the socio-cultural contexts of observation systems to ensure valid score interpretation

The articles in a special issue of this journal, Merits and Limitations of Researching Teaching Quality More Synergistically, grapple with the assertion that the field does not share a common language or structural decomposition of teaching and that the current range of frameworks and observation systems used by researchers jeopardizes the accumulation of knowledge in the field. We analyze these arguments from a socio-cultural perspective, theorizing that teaching and the improvement of teaching occur in socially situated contexts that give meaning to all research frameworks and measurement tools. Rather than asking whether a common framework of teaching might be useful, we ask when such a framework might be useful, when can such efforts be limiting, and why? Building on contemporary validity theory, we bring the role of context back into the current conversation. We suggest that while there are important affordances of a unified framework of teaching quality, such a framework will be unable to fully address some of the issues identified in this special issue. For practical, theoretical, empirical, and socio-cultural reasons, researchers will require multiple frameworks and associated observation systems to support the study and improvement of teaching across contexts.     

论体育新闻摄影中的美学选择

美是与选择连在一起的。在体育新闻摄影中,多层次、多角度的立体观察过程就是摄影的美学选择过程．通过大量的理论研究和对具体实例的分析,提出了体育新闻摄影的主题选择应通观全局、遣准局部;画面选择应突出主题、传神选意的观点。     

影响观察力的因素摭议

在生物、物理、化学等学科的教学及研究中,人们会反复强调观察力的作用,但是在数学教学及研究中,人们对观察力的作用还缺乏足够的认识。本文对数学教学及研究中观察力的作用以及影响观察力的思维因素、审美因素、预期因素、同化因素等加以分析。     

社会科学背景下因果推论的统计方法

如何根据非随机数据估计变量间的因果关系是社会科学研究中一个迫切的方法论问题。上世纪70年代,Rubin等人指出因果问题本质上是一个反事实的问题,认为某些统计方法可保证混淆变量和分组安排独立,并将这种方法推广到观察数据的分析中。倾向分数、工具变量和回归间断点是三种常用的方法,其中倾向分数居核心地位。以实际数据为例建立计算倾向分数的logistic模型,报告了模型的整体检验、预测变量的显著性检验和多重共线性检验、建立匹配组和分析结果报告。