角色游戏过程中的教师观察与指导     

赵焕明  袁源 《新疆教育学院学报》2013,(4):21-23

幼儿园角色游戏中,教师的有效介入指导是提高教师指导角色游戏质量的有效途径.教师依据观察分析采取适宜的干预方式是游戏指导的策略,是解决“游戏儿童”现象的重要抓手.  相似文献   

中国古代工匠美术教育方法探究     

谢祝清 《鸡西大学学报》2013,(7):18-19

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。  相似文献   

地学领域几个常见量符号的规范使用   总被引：1，自引：1，他引：0  

李学军  王小龙  白兰云  马丽 《编辑学报》2004,16(4):264-265

介绍地学书刊中经常出现的同位素比值、同位素组成、元素及氧化物的质量分数、摩尔分数和物质的量含量等 5类量的含义 ,阐明这些量在表达及量符号使用上存在的问题 ,以及如何规范地使用量符号来表达这些量。认为提高地学书刊编辑人员的地学专业知识水平是解决存在问题并正确执行《量和单位》国家标准的关键  相似文献   

列车荷载对下穿盾构隧道影响的模型试验     

李彦民 《福建工程学院学报》2019,(6):539-544

为研究地面线路运营对下穿盾构隧道结构的影响规律,基于相似比理论建立室内大型试验模型,模拟上部列车荷载作用下土层及其内部盾构隧道结构的受力变形过程,总结变形规律。结果表明,模型试验能够较好地反映外部荷载影响下土层以及内部盾构隧道结构的受力和变形特性;地表列车荷载在土层传递过程中,同一层面上沿地面线路方向的土压力大于两侧土压力,远离线路的地层受列车荷载影响相对较小,同一竖向截面土压力变化量由上至下逐渐减小,即外部荷载对浅层土的影响明显大于深层土;盾构隧道在地表列车行驶过程中,环向出现背车面受拉迎车面受压的受力特性,呈斜向压扁,纵向应变从中间交叉点向盾构隧道两侧逐渐减小,呈下凹压弯;盾构隧道埋深越小,受地表荷载影响越显著,增大一倍埋深对应纵向应变最大值减小约44.5%。  相似文献   

海底观测网的研究进展与发展趋势   总被引：1，自引：0，他引：1       下载免费PDF全文

李风华  路艳国  王海斌  郭永刚  张飞 《中国科学院院刊》2019,34(3):321-330

海底观测网是人类观测海洋的新型平台,可实现海洋由海底到海面的全天候、原位、长期、连续、实时、高分辨率和高精度观测,对海洋科学发展起到重要的支撑作用。美国、加拿大、日本以及欧洲各国凭借在海洋领域的先发优势,纷纷投入巨资构建海底观测网并成功运行。在现代传感器、水下机器人、海底光纤电缆、物联网、大数据等新型技术的推动下,海底观测网呈现综合性立体观测、数据深度发掘、多种观测计划综合交叉融合的发展趋势。  相似文献   

地球椭球模型中太阳位置计算的改进     

李文  赵永超 《中国科学院大学学报》2019,36(3):363-375

准确高效的太阳位置计算在遥感辐射定标、太阳能获取等多个领域具有重要应用价值。针对传统太阳赤纬角算法对不同年份数据差异考虑不足的问题，采用数值拟合法提出适用于不同年份的改进公式。根据误差曲线所呈现的周期性，采用傅里叶展开法提出以4年为周期的赤纬角改进算法，并推导出地球椭球模型下的太阳高度角公式。蒙气差影响太阳位置观测与计算。针对传统蒙气差算法在低仰角下误差较大的问题，提出0°~30°仰角下蒙气差的改进公式。把改进算法与相应的传统算法进行误差对比，结果表明，改进算法在太阳赤纬角、太阳高度角、低仰角下蒙气差计算的误差均明显降低，计算过程简单高效，符合相关工程项目应用需求。  相似文献   

A micro-perspective on students’ behavioral engagement in the context of teachers’ instructional support during seatwork: Sources of variability and the role of teacher adaptive support     

《Contemporary educational psychology》2021

Despite increased acknowledgement of the significance of situational factors to engagement, engagement is traditionally seen as a student characteristic. In this study, we investigated to what extent variation in observational measures of behavioral student engagement during seatwork is due to students versus teachers, teacher-student dyads, or situational (i.e., variation in time) effects. Additionally, we studied whether adaptive support during teacher-student interactions contributes to student engagement following that interaction. A cross-classified multilevel analysis of 324 video- and audio-recorded secondary school teacher-student interactions showed that situational factors and error were the strongest source of variability in student engagement. Other than expected, teacher-related and dyad-related variability were limited. Although behavioral engagement after teacher-student interaction was significantly higher than pre-interaction student engagement, higher post-interaction levels were not related to the level of adaptive support provided during the teacher-student interaction. These findings imply that situational factors deserve more attention in engagement research, for example by investigating what situational factors contribute to engagement. For teachers, the time-variant, situation-dependent nature of engagement opens up valuable opportunities to actively design optimal learning situations.  相似文献   

交流异步电机状态变量观测及其优化控制     

廖育武 《襄樊学院学报》2002,23(2):62-64

采用维持磁通始终恒定的方法对电机转矩直接控制，可解决交流异步电机控制精度和系统复杂性之间的矛盾，在电机状态变量观测及位置控制中应用了现代控制理论，和传统的矢量控制方法相比，在相同的性能指标下，该系统便于用微机来完成实时控制。  相似文献   

Harnessing Yik Yak for Good: A Study of Students’ Anonymous Library Feedback     

Mark Robison  Ruth Sara Connell 《Journal of Web Librarianship》2017,11(1):35-55

This study explores academic libraries’ potential uses of the mobile application Yik Yak, with particular focus on patrons’ anonymous feedback about library services and spaces. Over a 232-day period, the authors observed the Yik Yak feed for their university and recorded all yaks related to the library. A content analysis of the 249 library-related yaks found six distinct purposes that these library-related yaks served, from the perspective of the patron, which are of interest to the library: asking questions about library services; reporting problems with library spaces; reprimanding violations of and encouraging adherence to library policies; sharing compliments about library services; demons-trating need for improved library services; and discussing and offering feedback about library programs. This study reveals several opportunities for academic libraries to engage with Yik Yak in order to serve their patrons better, including providing virtual reference services, monitoring problems within the building, developing proactive approaches to policy enforce-ment, gathering honest and continuous feedback about the library's strengths, and identifying opportunities to improve and expand services. Implications for practice are discussed.  相似文献   

论清人词话的学术背景     

谭新红  王兆鹏 《南阳师范学院学报》2002,1(1):60-64

清词话作的学化，使清人词话与清代学术有着为更密切的联系。清代实学、朴学及今经学对清词话都有一定的影响。  相似文献