蒸汽发生-原子荧光光谱法测定山楂叶中痕量砷和汞     

乔凤霞闫宏远  田宝娟王孟歌 乔志卫 《保定师专学报》2006,19(4):23-25

采用蒸汽发生-原子荧光光谱法，分别在酒石酸和柠檬酸介质中分析山楂叶中砷（As）、汞（Hg）的含量，考察仪器操作条件、反应介质及共存离子等对测定As、Hg的影响．方法检出限为As：0．75μg／kg，Hg：0．034μg／kg．  相似文献   

预应力混凝土扁梁框架内节点拟静力试验研究     

乔虹  魏瑞演 《福建工程学院学报》2007,5(6):648-651

通过对3个不同轴压比水准的预应力混凝土扁梁框架内节点试件的低周反复荷载加载试验,对试件的破坏形态、滞回曲线、延性、耗能能力等抗震性能进行初步研究,并判定轴压比对预应力混凝土扁梁框架内节点抗震性能的影响规律.试验结果表明,随着轴压比的增大,节点的抗震性能随之下降.  相似文献   

论物理教学中对学生能力的培养     

刘琼 《怀化学院学报》2001,20(2):79-82

培养学生能力是物理教学的目的和关键，通过演示实验、创设情景、物理实验和解题可以培养学生的思维能力、分析问题和解决问题的能力．  相似文献   

Small fingers,big data: Preschoolers’ subitizing speed and accuracy during interactions with multitouch technology     

Michael Broda  Stephen Tucker  Eric Ekholm  Teri N. Johnson  Qiao Liang 《The Journal of educational research》2019,112(2):211-222

This study focused on 18 students 4–5?years old in an urban full-day preschool program in the Mid-Atlantic region of the United States. Over the course of a month, students used a touchscreen tablet to interact with Fingu, an app designed to develop students’ early number sense. Using backend data generated by the app, 8,153 individual task attempts were recorded. Multilevel growth modeling, with task attempts nested within students, was used to examine the extent to which students’ speed of response and response accuracy changed over the course of the study, as well as whether any individual characteristics were associated with either speed or accuracy. Results indicate that, on average, students become both faster and more accurate. Girls were also found to be more accurate than boys, and older students were found to be both slightly slower to respond and less accurate.  相似文献   

Pre-service teachers’ job-related perceptions of teaching in rural areas: a study of the free teacher education programme in mainland China     

Xuefeng Qiao  Manhong Lai 《Teachers and Teaching》2019,25(7):782-799

ABSTRACT

This article examines the development of pre-service teachers’ job-related perceptions of teaching in rural areas in the Free Teacher Education (FTE) programme in mainland China. Drawing on in-depth interviews with 22 teacher educators and 11 pre-service teachers, this study found that pre-service teachers’ perceptions were constructed through relative perspectives, professionality orientation, and realistic expectations during the process of FTE teacher education. Pre-service teachers employed utilitarian concerns to increase access to prestigious universities to the detriment of their academic interests. The professionality orientation of the FTE programme held a profile of isolated curriculum modules, urban-centred approach, and theory-practice divide, resulting in pre-service teachers’ fragmented body of knowledge and weak rural consciousness. Although participants saw significant improvement in living and working conditions of rural schools, their negative perceptions were magnified due to this weak rural consciousness. This study argues that the FTE programme needs to integrate separated courses and embed the components of rural settings in addition to current financial incentives.  相似文献   

音乐核心素养视域下的识读乐谱教学     

资利萍  颜琼 《科教导刊》2020,(3):100-101

音乐核心素养的提出,赋予了音乐教育新的价值与意义.识谱知识与能力作为音乐知识与技能的必要组成部分,是学生音乐核心素养形成的有力支持.实际的音乐教学实践中,存在识谱教学方法枯燥低效、识谱教学规划不合理的问题,本文试结合实例提出以上问题的解决策略.  相似文献   

现代教师的心理健康及其维护     

黎琼锋 《钦州学院学报》2002,17(2):58-61

教师的心理健康水平不仅会对学生的心理产生影响 ,还直接影响到教育教学的效果。在现代社会里 ,教师的心理健康受到的影响主要表现在 :由于现实利益与职业理想的矛盾引起的心理不平衡、多重角色导致的心理冲突。维护教师的健康心理须从优化教育环境、教师自身进行完美人格塑造和接受培训做起。  相似文献   

A Brief Discussion on Several Values of Americans     

谢琼 《双语学习》2007,(12M):225-226

The United States of America is the only super country on the globe. She attracts many people from different countries, cultures and races. It seems that everyone who comes to this country can make his own life, even a better life than before. The article discusses several values of Americans which are generally regarded as the basic and important ones. These values did, does and will help people in the USA to have a prospective future.  相似文献   

构建科学管理制度与机制,提高大型仪器设备管理水平     

徐一新  刘乔  赵邦枝 《实验技术与管理》2008,25(9)

分析了高校大型仪器设备使用效率偏低的原因,探讨了构建科学管理制度与机制,提出树立共享意识,建立统分结合的大平台,推进网络管理,提高大型仪器设备管理水平。  相似文献   

后喻文化背景下导师与研究生之间的和谐关系探讨   总被引：1，自引：0，他引：1  

蔡琼  吕改玲 《中国高教研究》2008,(3)

师生关系贯穿教育过程的始终,是社会文化特质在教育领域中的反映.我国研究生教育更加注重专业教育和开展科学研究,教育主体有其自身的特殊性.因此,在后喻文化的时代背景下,通过平等对话、合作共享和情感交流来促使他们之间关系的和谐就显得尤为重要.  相似文献