Introducing DSP with an electronic book in a computer classroom

A first course in digital signal processing is being taught with an electronic book in a computer classroom. The electronic book is a set of Mathcad documents bound with hyperlinks and with navigation, full text search, annotation, and special pasting facilities. The documents consist of interactive text, graphics, and mathematics regions. The computer classroom consists of 20 student personal computer (PC) workstations and an instructor's podium with PC workstation, lighting, and projection (computer screen, overhead, and video) controls. The electronic book, the computer classroom, experience with student-selected content and pacing, portfolio and project evaluation, and other instructional methods are discussed     

A graphics simulator for a robotic arm

A graphics robot simulator designed for an IBM PC/XT/AT or PS/2 personal computer is presented. The simulator is a terminate-and-stay resident (TSR) program that runs in the background and intercepts commands that would normally go to the robot controller through the COM1 serial communication device. With the use of the simulator, students can develop and test robot control programs offline without a physical robot present, using the language of their choice. The status of the simulated robot is available through a 3-D graphics display and a one-line text window, each of which can be activated from the keyboard or from within a user program. Data files are used to specify the robot to be simulated and the environment or workcell within which it is to operate. Currently supported robots include the Rhino XR-3 educational robot and the Adept One and Inteledex 660 industrial robots. The workcell features an overhead camera and objects that can be sensed by the camera and manipulated by the robot.<>     

220kV集控站的设计与实现

集控站采用分区集控站模式实现区域内受控站的运行监控和管理。数据采集和监控(SCADA)系统采用双服务器、双前置机、双网的网络拓扑结构,硬件平台为IBM系列服务器和工作站,监控工作站、维护工作站为PC工作站;软件采用Unix、Windows混合平台模式,使用Oracle数据库。给出了系统的配置图和软件结构图,叙述了数据采集的流程、系统的指标体系及系统实现的关键技术(前置双网、网络通道的接入、系统远程监视和维护)。     

自动测试系统的组建和应用

本叙述了自动测试系统的发展状况，并以由ＩＢＭＰＣ或兼容机和ＧＰ－ＩＢ接口管理板，数字功率表构成的自动测试系统为例，介绍了自动测试系统的组建和应用。     

CAL programs developed in advanced programming environments forteaching electrical engineering

Following the need to provide profound understanding of fundamental concepts in electrical engineering a number of computer assisted learning (CAL) programs have been developed in the Department of Electronic and Electrical Engineering at Surrey, UK, to aid teaching of signal analysis, electromagnetic field theory, engineering mathematics, power electronics and telecommunications. They all run on personal computers (Apple Macintosh or IBM PC), except for the telecommunications tutorials which are designed for SUN workstations. The programming environment used is cT for personal computers and the advanced simulation software package SPW for workstations. The course material is designed to meet the requirements of a modular syllabus structure. The software is developed by final year undergraduates for pedagogical reasons with the emphasis on animation, real-time calculations, interactiveness and self-assessment     

DF-PAK: a digital filter design software package

An introduction to a computer-aided design package called DF-PAK is presented. DF-PAK contains software modules for the design and analysis of digital filters and runs on the IBM personal computer (PC). These modules are based on established classical theories and can be integrated to serve a variety of educational needs     

电力系统虚拟现实场景开发研究

电力系统仿真培训是提高操作人员素质，保证电力系统安全，有效运行的重要手段之一，将虚拟现实技术引入电力系统的培训系统，能给培训系统增添真实感和沉浸感。虚拟现实技术结合了计算机图形学、多媒体技术、人机交互技术等，是仿真技术的高级发展和突破。本文主要叙述了在微机上初步实现电力系统虚拟环境三维场景显示和三维声音回放的方法。以及ＯｐｅｎＧＬ、ＯｐｅｎＩｎｖｅｎｔｏｒ、３ＤＳｔｕｄｉｏＭＡＸ等关键技术和软件。     

PC/AT温盘子系统与系统恢复

IBMPC/AT采用80286微处理器,其指令执行速度快,计算能力更强,内存空间大,亦确定了微机温盘子系统的新标准,是个人计算机上的软件开发极好环境。由于使用不当及其他原因,PC/AT温盘子系统会出现无法引导系统文件。记录数据信息丢失,温盘存贮容量损失一半的现象。本文旨在从研究AT温盘子系统的生成出发,阐述了“坏死”温盘子系统如何激活。温盘存贮容量如何恢复等系统恢复的几种可行方法。     

新型冶金连铸多流电磁搅拌装置计算机控制系统的研制

介绍一种冶金多流电磁搅拌装置计算机控制系统，该系统基于IBM－PC总线，具有开放式和多级分布式体系结构。文中概要讨论了系统的主要功能、组成原理和相关技术。     

IBM—PC微机与MCS—51单片机间的串行通讯

对微型计算机IBM－PC与MCS－51单片机在串行通讯中的几个关键问题进行了深入分析、讨论,同时提出可行的解决方案。在实际数据传输中,不仅准确可靠,而且能根据应用场合的需要,改变传输速度,效果良好。     

Promoting the application of expert systems in short-term unitcommitment

A heuristic approach to the short-term unit commitment problem is presented. The generating unit's capacities are divided into thee categories, and then a rough 24 h-generation schedule is established. The global optimization is performed as an inference process. A prototype system is developed and tested on an IBM-386 personal computer using the C language. The ToolBook software is used to enhance the graphics capability of the package. The primary advantage of the proposed method is its short processing time for each schedule, as it schedules the generation unit commitment for a typical system in less than 2 s. The same system is examined by dynamic programming with an average running time of 20 min on an IBM 386 personal computer     

基于GSM短信技术的电网电压监测仪研制

基于全球移动通信系统(GSM)技术的电网电压监测系统由多台短信电压监测仪、GSM网络、IBM-PC586上位机及电压监测统计管理软件4部分组成。介绍了短信电压监测仪的硬件(电压／电流信号的采样、滤波、信号调理、A／D转换、显示、时钟、GSM—Modem接口等)电路及其功能。讨论了GSM通信发送／接收短信息的编码规则与步骤以及短信电压监测仪的短信处理。     

An updated PC-based assembly language programming laboratory

An undergraduate computer engineering laboratory that supports a one-quarter, PC (personal computer)-based assembly language programming course is described. The course sequence is required for the computer engineering and is taken as a technical elective by many students in electrical engineering. The novel features of this state-of-the-art laboratory include a symbolic debugger with support for Assembly and high-level languages, a local area network of PCs, online documentation, and a RGB projector for interactive classroom demonstration     

Teaching in a computer classroom with a hyperlinked, interactivebook

A first course in digital signal processing is being taught with an interactive book in a computer classroom. The interactive book is a set of Mathcad documents bound with navigation, full text search, annotation, and special pasting facilities. The documents consist of editable and active text and graphical and mathematical regions. The computer classroom has 20 student PC workstations, 40 seats, an instructor's podium with PC workstation, and lighting and projection (computer screen, overhead, and video) controls. Discussed are the choices of software, interactive book, computer classroom, teaching methods, student evaluations, and future plans     

Use of Interactive Computer Graphics in EM Fields Courses

This paper discusses experience in the use interactive computer graphics in a first electric and magnetic fields course, taught at the junior level in the Electrical and Computer Engineering Department at the University of Michigan. Interactive computer graphics in this discussion means that in the teaching-learning process, both instructor and students set up, display, and study solutions of electric and/or magnetic field problems, using graphics terminals such as the COMPUTEK 400/20 and the TEKTRONIX T4002.1.2 Interactive computer graphics can be a real asset in helping both instructor and students with the teaching-learning process. It allows the instructor to present to the class solutions for a wide range of field problems in the form of curves and drawings which are easy to understand. Most of these presentations would be too tedious to do in any other way. The student can then experiment further with these field phenomena, trying a variety of different situations as dictated by his curiosity or as directed by the instructor. Thus, interactive computer graphics allows the class to probe more deeply into a broader range of field phenomena, yet stay within the usual constraints of time and expertise available in a junior level class.     

A suggested energy-savings evaluation method for ACadjustable-speed drive applications

A procedure is offered for the evaluation of the energy savings obtained by the use of AC adjustable-speed drives on pumps, fans, and other types of driven equipment such as compressors or extruders and mixers. A method for the economic evaluation of the energy savings is also offered. The method that best insures that all the required factors will be considered is to calculate separately the energy usage by the adjustable-speed drive system and the base comparison system, and then evaluate the energy savings as the difference between the two usage figures. These procedures and the necessary databases have been incorporated into a user-friendly computer program that can be operated on any IBM PC or compatible computer     

COPERITE-computer-aided tool for power engineering research,instruction, training and education

A graphics-oriented, primarily PC-based tool for education, research, and training in power engineering is introduced. The tool, called COPERITE, has all user interfaces resident on an IBM-386 microcomputer. Menus and windows are used for the interface, and attractive graphical representations and displays are included. Application programs that are interfaced are power flow, contingency analysis, economic dispatch, security-constrained dispatch, system stability, and fault analysis. These programs are executed on a VAX 8800 computer mainly for speed of execution. Information exchange between the PC and the VAX is made through an Ethernet connection which is transparent to the user. Results of execution show on the graphical front-end accessible to the user. COPERITE has a powerful network editor with the capabilities of adding, deleting, moving, and finding symbols with a graphics cursor. Provisions are present for building and using artificial intelligence techniques for system operation enhancement     

Computer-Managed Instruction in Electromagnetic Field Theory

This paper discusses the application of computer-managed instructional techniques in an introductory electromagnetic field theory course being taught to all undergraduate students in the College of Engineering at The University of Iowa. In the process of preparing the various computer lessons, we found ourselves faced first with the need to carefully appraise what we wished the students to learn and then to consider appropriate teaching strategies for achieving the desired objectives. Our approach to computer assisted instruction takes several different forms, including use of drill and practice modules, tutorial segments, computer-administered quizzes, and field visualization through interactive computer graphics. Our computer-managed instructional materials complement the more traditional forms of instruction being used in EM theory, rather than replacing them. In this way we seek to provide alternatives designed to suit the different learning needs of our students.     

Computer Animation-An Exciting New Tool for Educators

A tutorial paper on computer animation is presented that answers the following questions. 1) What is computer animation and how did it begin? 2) Who is active in the area? 3) What is the present state of the art? 4) How is computer animation accomplished in a batch-processing environment? 5) What is the role of interactive graphics? 6) What are some of the special techniques that are being developed? 7) How does one get started? In addition, extensive bibliographies on computer animation publications and films are included.     

EPLOT: a machine-independent graphics system

EPLOT was designed as an inexpensive and interactive small graphics library to be run on workstations, stand-alone microcomputers and mainframes, or microcomputers used as graphics terminals. It started as a minor extension to the machine-independent UNIX PLOT library but now includes capabilities for menu and mouse operations, animation, and other functions required in student projects. EPLOT allows the easy development and transfer of interactive graphics programs between SUN, MSDOS, Amiga, ATARI, and Apple Macintosh systems. It has played an important role in the philosophy of the computer graphics course offered at the authors' institution. The scope of EPLOT is demonstrated through a series of projects and programs