CAD(computer aided design)是一种用计算机硬、软件系统辅助人们对产品或 工程进行设计的方法与技术,包括设计、绘图、工程分析与文档制作等设计活动, 它是一种新的设计方法,也是一门多学科综合应用的新技术。 传统CAD涉及以下一些基础技术:

1.1单片微机的发展 1.1.1单片微机的概念 单片微机是单片微型计算机SCMC(Single Chip Micro Computer)的译名简称,在国内也常简称为“单片微 机”或“单片机”。它包括中央处理器CPU、随机存储器rAM 、只读存储器ROM、中断系统、定时器/计数器、串行口和 IO等等

本文分析、讨论了自动化系统的防雷问题,着重阐述了水厂自动化控制系统的综合防雷措施。 关键词:水厂、自动化系统、防雷、瞬间过电压 概述随着计算机技术( Computer)、控制技术( Contro)、通讯技术( Communication)、显示技术(CR T)的发展和广泛应用,目前水厂的自动化控制普遍采用由工业计算机IPC或可编程控器PLC组成的集数据 采集、过程控制和信息传送于一体的监控网络

Plan for Today CAD Lecture(ca 50 min) CAD History, Background Some theory of geometrical representation SolidWorks Introduction(ca. 40 min) Follow along step-by-step Create CAD model of your part(ca. 90 min) Work in teams of two Use hand sketch as starting point

Chapter 6 Multimedia Networking Computer Networking: A Top Down Approach Featuring the Internet The power point slides are based on the materie 2nd edition provided by

Chapter 4 Network Layer Computer Networking: A Top Down Approach Featuring the Internet The PowerPoint Slides are based on the material 2nd edition. provided by Jim Kurose, Keith Ross

Chapter 3 Transport Layer Computer Networking The Powerpoint slides are based on the A Top Down Approach material provided by Featuring the Internet J F Kurose and K.W. Ross 2nd edition

Chapter 2 Application Layer Computer Networking: A Top Down Approach The PowerPoint Slides are based on Featuring the Internet, 2nd edition. the material provided by Jim Kurose, Keith Ross .F Kurose and K.W. Ross. Addison-Wesley, July

1.1计算机辅助设计概述 1.1.1计算机辅助设计的概念 计算机辅助设计( Computer Aided Design,CAD)是利 用计算机强有力的计算功能和高效率的图形处理能力, 辅助知识劳动者进行工程和产品的设计与分析,以达到 理想的目的或取得创新成果的一种技术。它是综合了计 算机科学与工程设计方法的最新发展而形成的一门新兴 学科。计算机辅助设计技术的水平成了衡量一个国家工 业技术水平的重要标志

The brain is a complex and delicate part of the human organism. It works in special ways through the three systems the Sensory system which functions as receiving information from the outside world; the Motor system which is of the function of sending instructions to the body the Homeostatic system which functions as telling parts of the body how to work or more. But the computer can't do these ways nowadays because it lacks imagination