复合图书馆浅析

复合图书馆是数字图书馆与传统图书馆长期共存、共同促进、共同发展的一种态势,是当前和今后较长一段时期内的图书馆实际运行形态。我们应综合考虑多方面的因素,切实搞好复合图书馆的建设。     

电机控制数字信号处理器最小测试指令集的分析和寻找

The relativity of instructions of motor control digital signal processor (MCDSP) in the design is analyzed. A method for obtaining a minimum instruction set in place of the complete instruction set during generation of testing procedures is given in terms of the processor presentation matrix between micro-operators and instructions of MCDSP.     

数字与数字化设计

本文试图从数字化的本质内涵角度探讨数字化设计。     

数字图像置乱技术及置乱度分析

讨论了一种新的置乱度计算公式,试验表明,该公式可以很好地反映置乱程度。     

基于Unity的制造业自动化生产线数字孪生平台设计

为实现制造业自动化生产线的优化运营,设计了基于Unity的数字孪生平台。首先,利用SolidWorks软件进行三维建模,在Unity平台中按与物理生产线1：1的尺寸比例完成虚拟自动化生产线的搭建;其次,在Unity平台中建立工业机器人数学模型,利用D-H参数表,进行正、逆运动学求解,实现对工业机器人的运动控制;最后,基于Snap7协议实现西门子PLC与Unity平台的数据交互。结果表明,通过数字孪生平台,可以实现生产线全流程的可视化,从而能够更好地了解生产线的运行状态,及时发现问题和解决问题。     

基于DSP的直流无刷电动机神经网络控制系统

提出了一种直流无刷电动机的N-PID转速调节器的设计方法。在直流无刷电动机的高性能速度跟踪中,若仅采用传统的PID调节器,则难以克服系统超调和短时振荡问题,采用复合N-PID的控制方法,利用神经网络的自学习自适应功能在线调整PID控制参数。介绍了基于数字信号处理器的直流无刷电机神经网络调速系统,仿真结果表明,运用这种设计方法很好地抑制了超调和振荡。     

Socioscientific issues via controversy mapping: bringing actor-network theory into the science classroom with digital technology

ABSTRACT

What are the current challenges and opportunities for bringing actor-network theory (ANT) into issues-based science education? This article discusses experiences gained from introducing an educational version of ANT deploying digital technology into an upper secondary school science class. This teaching innovation, called controversy mapping, has been pioneered in different contexts of higher education before being adapted to school education. Experimenting with controversy mapping in a Swedish science class raised both conceptual and practical issues. These centre on: (1) how ANT-inspired controversy mapping redesigns the citizenship training enacted by institutionalized approaches to issues-based education as socioscientific issues (SSI); (2) how controversy mapping reconfigures the interdisciplinarity of issues-based science education; and (3) how controversy mapping displaces scientific literacy and knowledge of the nature of science as guiding concerns for teaching in favour of new preoccupations with digital literacy and digital tools and methods as contemporary infrastructures of free and open inquiry.     

Using Information and Communication Technologies to teach and learn mathematics in South African schools: A snapshot view of its impact

Information and communication technologies (ICTs) have become ubiquitous in most people’s lives. Yet, within the developing and emerging regions, there are still many who have not fully benefitted from ICTs. This article reports on a research project that focused on investigating the barriers, opportunities and impact that ICTs have on the teaching and learning of mathematics in South African schools. A quantitative research methodology in the form of a survey was used to assess South African mathematics teachers’ access to and use of ICTs and mobile technologies. A literature study revealed that there were universal barriers (i.e. lack of access to resources, time, effective training, confidence; resistance to change and negative attitudes; and no perception of benefits) and numerous opportunities for using ICTs in teaching and learning in general, and in subjects such as mathematics and science, in particular. The survey findings suggested increased deployment of ICT resources; introduction of more ICT training opportunities for teachers and students; and the firm adoption of ICT policies and directives within the education domain.     

谈信息社会高等院校教师的作用和发展

信息技术的发展,促进了数字技术在高校教育教学中的应用,这对高校教师的素质提出了新的要求。为适应社会需求,教师应转变观念,树立现代教育思想,最大限度地掌握数字教学技术,不断完善良好的品格修养,培养良好的心态和坚强的性格,勇于开拓创新,不断提高工作能力,以促进教育事业的发展。     

合并大学校区分馆建设与发展面临的问题和对策

合并大学校区面临的主要问题是合并大学校园分散所带来的交通不便，以及资源较少、服务手段落后和管理不畅通。校区分馆首先应明确其功能定位，制定发展规划，在此基础上开展诸如文献资源配置等各项建设。在建设和发展中需要特别处理好总馆与分馆在不同时期的管理关系，注重建立数字化信息服务平台，拓宽服务手段，实行校区专业分馆的“学科馆员制”，据此构建合并大学较完善的全校性的文献服务保障体系。