汇川H2U系列PLC之间RS-485通信的实现     

尚丽  叶国平 《苏州市职业大学学报》2020,(2):15-21

主要研究了汇川公司H2U可编程控制器(PLC)的通信技术,实现了两个H2U系列PLC之间基于RS-485的通信,并详细介绍了PLC之间通信的硬件连接方式、通信串口参数配置、触摸屏画面的设计以及程序实现。所讨论的方法已在采用H2U PLC及辅助设备组建的"运动控制系统"课程的教学实验平台上进行了验证,可以拓展应用于多台H2U PLC之间以及其他设备与H2U PLC之间的RS-485通信实现,对工程应用具有一定的借鉴意义。  相似文献   

Exploring Developmental Appropriateness of Multitouch Tables in Prekindergarten: A Video Analysis     

Jennifer Ward  Stephanie Branson  Megan D. Cross  Ilene R. Berson 《Journal of Research on Technology in Education》2016,48(3):227-238

This study explored how developmentally appropriate practices influenced the affordances of a multitouch surface in an early childhood classroom. Children, ages 4 to 5 years old, were videotaped while engaged in a storymaking application on a multitouch table. As a result of the study, we found that some challenges with the functionality undermined children's autonomous control. The researchers observed numerous instances of issues with control of the medium, including height of the table, sensitivity to multiple types of touch, and limited instructions and prompts. Implications for future research and practice are discussed.  相似文献   

Questioning the no-touch discourse in physical education from a children's rights perspective     

Marie Öhman  Ann Quennerstedt 《Sport, Education and Society》2017,22(3):305-320

In this paper we question the rationality of ‘no-touch policies’ and offer an alternative approach to the matter of physical contact between teachers and students in the context of physical education (PE) in schools. Earlier research has drawn attention to how a discourse of child protection is starting to affect how physical contact is viewed in PE practice. The avoidance of intergenerational touch is increasingly justified by referring to the children's rights agenda. Here, arguments for ‘no-touching’ are linked to children's right to be protected from harm. In the paper we explore a children's rights-based viewpoint that supports the use of and need for physical contact in PE teaching by developing theoretical and practice-based arguments. An alternative children's rights perspective, based on rights theorising, is used to formulate the theoretical argument. Interviews with 16 PE teachers about their experiences of physical contact in their pedagogical work form the practice-based arguments. The two arguments provide a way of looking at intergenerational touch in education from the vantage point of children's human right to develop to their full potential, which can support a need for physical touch in pedagogical situations.  相似文献   

触摸屏技术的原理及应用   总被引：4，自引：0，他引：4  

曲海波  陈莉 《中国教育技术装备》2006,(11):49-51

触摸屏技术被认为是未来人机交互科技的主流方向之一。相关的产业及其产品的应用也正在成为一个技术热点。阐述了触摸屏技术的基本原理，应用场合及发展趋势。  相似文献   

触屏式数控机床维修教学设备设计     

李奇亮 《中国现代教育装备》2011,(21):20-22

在数控机床装调与维修实训教学过程中,如何直观高效地进行电气控制线路故障逻辑分析及查找,数控系统参数误设的恢复,故障现象和故障类型的必然性联系判断,采用PMC编程法的机床功能修改以及机电联机调试等实训课题是目前数控设备应用与维护等相关专业学习中普遍存在的难点。针对这些关键问题,基于触摸屏和强抗干扰技术设计出自动设故的数控机床维修教学设备,该设备具有设故高效率、智能化、成本低等特点。该项目的完成为机床装调与维修、电气控制等实训教学创造了有利条件,同时提升了教师的教学水平和学生的综合能力,为进一步扩大校企合作领域奠定坚实基础。  相似文献   

26届奥运会女排选手身体形态与弹跳特征   总被引：13，自引：2，他引：11  

张冉 《广州体育学院学报》1998,(1)

以 2 6届亚特兰大奥运会女子排球决赛队员为主要研究对象 ,对其身体形态 ,弹跳能力进行数据统计 ,揭示当今世界级优秀女排运动员的基本特征 ,为中国女排训练及选材提供参考依据。  相似文献   

中国男篮在身体接触情况下背向进攻的特征   总被引：5，自引：0，他引：5  

周威  董伦红  熊国庆 《体育学刊》2001,8(3):32-34

通过对NBA总决赛、奥运会队及CBA比赛某些场次的背向进攻方式，脚步动作，投篮方法等研究，指出我国国家队和甲级队在比赛中有身体拉触的投篮次数占总数的比率少，对抗投篮得分占总得分的比率较低，队员主动进攻能力差等问题，为篮球科学训练提供理论依据和参考：  相似文献   

An integrated teaching method of gross anatomy and computed tomography radiology          下载免费PDF全文

Tohru Murakami  Yuki Tajika  Hitoshi Ueno  Sachiko Awata  Satoshi Hirasawa  Maki Sugimoto  Yoshihiko Kominato  Yoshito Tsushima  Keigo Endo  Hiroshi Yorifuji 《Anatomical sciences education》2014,7(6):438-449

It is essential for medical students to learn and comprehend human anatomy in three dimensions (3D). With this in mind, a new system was designed in order to integrate anatomical dissections with diagnostic computed tomography (CT) radiology. Cadavers were scanned by CT scanners, and students then consulted the postmortem CT images during cadaver dissection to gain a better understanding of 3D human anatomy and diagnostic radiology. Students used handheld digital imaging and communications in medicine viewers at the bench‐side (OsiriX on iPod touch or iPad), which enabled “pixel‐to‐tissue” direct comparisons of CT images and cadavers. Students had lectures and workshops on diagnostic radiology, and they completed study assignments where they discussed findings in the anatomy laboratory compared with CT radiology findings. This teaching method for gross and radiological anatomy was used beginning in 2009, and it yielded strongly positive student perspectives and significant improvements in radiology skills in later clinical courses. Anat Sci Educ 7: 438–449. © 2014 American Association of Anatomists.  相似文献   

基于ucGUI的触摸屏消息流转机制的研究     

王宜结 《淮南师范学院学报》2013,15(3):35-37

四线电阻式触摸屏因其使用方便,价格低廉等诸多突出的优点,获得了广泛的应用。ucGUI是Micrium公司开发的通用的嵌入式图形用户界面软件,其最大的优点是体积小,结构清晰,因而特别适用于内存较小的嵌入式系统。ucGUI对触摸屏有良好的支持。本文主要分析在ucGUI下触摸屏消息是如何被识别、传递并进行处理的。  相似文献   

How Haptics and Drawing Enhance the Learning of Anatomy     

Stephen Reid  Leonard Shapiro  Graham Louw 《Anatomical sciences education》2019,12(2):164-172

Students’ engagement with two-dimensional (2D) representations as opposed to three-dimensional (3D) representations of anatomy such as in dissection, is significant in terms of the depth of their comprehension. This qualitative study aimed to understand how students learned anatomy using observational and drawing activities that included touch, called haptics. Five volunteer second year medical students at the University of Cape Town participated in a six-day educational intervention in which a novel “haptico-visual observation and drawing” (HVOD) method was employed. Data were collected through individual interviews as well as a focus group discussion. The HVOD method was successfully applied by all the participants, who reported an improvement of their cognitive understanding and memorization of the 3D form of the anatomical part. All the five participants described the development of a “mental picture” of the object as being central to “deep learning.” The use of the haptic senses coupled with the simultaneous act of drawing enrolled sources of information that were reported by the participants to have enabled better memorization. We postulate that the more sources of information about an object, the greater degree of complexity could be appreciated, and therefore the more clearly it could be captured and memorized. The inclusion of haptics has implications for cadaveric dissection versus non-cadaveric forms of learning. This study was limited by its sample size as well as the bias and position of the researchers, but the sample of five produced a sufficient amount of data to generate a conceptual model and hypothesis.  相似文献