If we built it,would they come? Creating instruction videos with promotion in mind     

Leticia Camacho 《Journal of Business & Finance Librarianship》2018,23(1):26-34

This article reports on a video project done in an academic library where faculty were included in the production and marketing of the library instruction videos. The videos allowed the librarian to provide a shorter presentation and spend most of her time working individually with each student. The results showed that 97% of the students watched the videos and were able to benefit from the content. The implementation of the videos was a success due to the collaboration of the professors teaching the three courses and the buy-in of the course coordinator; both factors were essential in the success of the video project.  相似文献   

Bullying and the Unique Socioemotional Needs of Gifted and Talented Early Adolescents: Veteran Teacher Perspectives and Practices     

William T. Allen Jr. 《Roeper Review》2017,39(4):269-283

Much is written at the elementary school level concerning bullying and the socioemotional needs of gifted and talented (GT) students; however, in the last 10 years, little qualitative research exists concerning the early adolescent GT age group. In the social environment of classroom life, early and current research indicates that many of these students experience neurotic perfectionism, overexciteabilities (OEs), developmental asynchrony, and bullying. The formation of autonomous classes (GT-only classes) has afforded some hope concerning the amelioration of such problems; nevertheless, in this study, detailed evidence of classroom bullying in the form of social ostracism and teasing has been found with this GT age group. If left unchecked, psychological autopsies have shown these students suffering emotional difficulties and even committing suicide as a result of school and classroom torment. With such potential for classroom bullying problems, few studies address what veteran teachers of early adolescent GT students do to keep students psychologically safe. Within the social milieu of classroom life, and in comparison to research standards, this study explores three efficacious teacher perspectives and practices.  相似文献   

Social Constructivism and Asynchronous Text-Based Discussion: A Case Study with Trainee Teachers     

Kate Hawkey 《Education and Information Technologies》2003,8(2):165-177

The paper reports a case study using asynchronous text-based discussion. It considers the role of the tutor and discusses the extent to which online discussions can facilitate social constructivist approaches to instruction and the creation of knowledge. Participants were 17 trainee teachers studying on a post graduate teaching course. The asynchronous text-based discussion (using e-blackboard) focused on planning for progression in children's learning in history and culminated in the trainee teachers writing individual assignments on the topic. The paper analyses the different types of contributions made and reports on the trainees' evaluations of the benefits and limitations of using e-blackboard. It concludes with recommendations and areas for further research.  相似文献   

基于交-交变频技术实现异步电动机重载起动的研究     

雷慧杰  张艳伟 《安阳工学院学报》2007,(4):18-21

为解决异步电动机重载起动存在的不足,提出了一种以80C196KC DSP为控制技术的交-交变频系统的实现方法.该方法具有起动电流小、启动转矩大、启动平滑、运行稳定、控制效果好的特点,详细阐述系统主电路及控制部分的原理和实现方法.  相似文献   

异步电机驱动时起升机构电机联轴器承受的载荷     

畅启仁  倪骏 《上海海事大学学报》1989,(1)

本文介绍了应用异步电动机驱动的起重机起升机构在起动时,线弹性和非线弹性联轴器中冲击扭矩的确定方法。 在起重机起升机构两自由度简化力学模型的基础上,建立非线性振动微分方程,采用Runge-Kutta数值积分方法在IBM-PC微型计算机上求得系统的动载响应,同时对系统参数作了特征值化处理;并在此基础上,得到了载荷峰值函数线图。本文还提出了借助于载荷峰值函数来确定联轴器承受的冲击扭矩的方法。  相似文献   

社交网络舆情下的二元信息竞争SH2IR模型及仿真研究     

靖鲲鹏  岑怡 《情报杂志》2022,(1)

[研究目的]网络舆情中信息间的竞争传播更符合社交网络的真实情境,研究舆情事件中多元信息竞争传播的演化机制有助于政府和媒体有效监控舆情、引导舆论。[研究方法]结合舆情事件多信息传播特点,加入信息犹豫者和信息接触率,构建二元信息竞争的SH2IR模型,仿真同步和异步情景下二元信息的竞争演化过程。[研究结论]研究表明,在同步传播模式下,单独增强信息接触率、传播转化率、犹豫转化率以及置换率,都可以扩大信息的传播;在异步传播模式下,信息发布的越早,传播范围越广,但单独增强传播参数对传播效果影响较弱,同时提高信息的传播参数时传播行为明显加强。  相似文献   

无线网在现代组网中的应用方案     

曹建文 《天水师范学院学报》2006,26(2):43-45

无线局域网组网技术的发展和逐步成熟,推动了其在应用领域的普及,特别是在家庭组网中的应用。通过对无线局域网的发展、连接及标准ATM技术的应用探究,使无线局域网得到完善,进一步分析其优缺点和发展前景,为实际的应用提供一种理论指导。  相似文献   

运动员竞技子能力非同步性发展的致因解析     

李赞  田麦久 《体育学刊》2011,18(1):95-98

对导致运动员竞技子能力非同步性发展的原因进行了分析后认为:运动员竞技子能力的非同步性发展,是遗传效应、训练效应、比赛效应和生活效应综合影响的结果;从因果关系上看,遗传效应是内因,训练效应、比赛效应和生活效应是外因。同时对影响运动员竞技子能力非同步性发展的因素进行了重要程度的排序。  相似文献   

异步电机定子绕组状态监测与故障诊断方法     

何炳海  张立新  范子胜 《中国科技信息》2011,(24):111-112

定子绕组故障是异步电动机在运行过程中出现的主要故障,为了保障电动机的安全运行,对异步电动机进行状态监测与早期诊断是很有必要的。关于异步电动机定子绕组状态监测与故障诊断的方法,主要分为两类：第一类是基于模型的故障识别方法;第二类是基于信号检测的诊断方法。  相似文献   

SAPSO-BP算法在异步电机故障诊断中的应用     

张莹 《蒙自师范高等专科学校学报》2014,(2):36-38

为了提高异步电机故障诊断的准确性,引入了一种基于模拟退火粒子群算法优化BP神经网络(SAPSO-BP算法)的故障诊断方法.根据电机转子振动频谱中所提取的特征参数与故障类型之间的关系数据,利用模拟退火粒子群算法来优化BP神经网络的权、阈值参数,再由优化好的BP网络进行故障诊断.实验结果表明,该方法具有较好的故障模式的识别效果,明显提高了异步电机故障诊断的准确性.  相似文献