螺旋线行波管三维CAD技术进展

介绍了螺旋线行波管三维CAD技术的国际国内研究现状；对目前主流的部分螺旋线行波管三维CAD软件(MICHELLE、COCA、CTLSS、CHRISTINE等)进行了简单介绍。展望了螺旋线行波管CAD技术的发展前景，对我国如何自主开发螺旋线行波管三维CAD软件提出了一些建议。     

AUTO CAD在机械工程设计中的应用现状与发展方向

本文通过介绍AUTO CAD技术及应用软件、系统产生的背景,结合我国当前AUTO CAD技术、软件发展的现状,对AUTO CAD在我国机械工程设计当中未来发挥的作用、未来发展的方向等方面进行展望。     

三维CAD软件测评标准研究

随着工业数字信息化的发展,三维CAD软件的质量在企业产品生命周期中越来越受到关注。软件测试是保障应用软件质量的重要手段,编制能够符合三维CAD软件特点的测评标准的目的是为了规范三维CAD软件测评工作,为软件项目管理、软件开发等提供依据。应用于不同行业的三维CAD软件呈现出功能要求繁杂、数据种类多和专业性强等特点。对三维CAD软件发展及其标准化工作进行了分析,建立了三维CAD软件质量测试与评价模型;引用国家相关标准,结合软件测试工作问题、经验进行总结,制订了三维CAD软件测评标准,包括功能、性能、兼容性、源代码安全性测评和测试过程,以及测试用例设计等内容,具有参考价值。     

重庆渝光科技公司简介

正重庆渝光科技公司是中国电子科技集团公司第四十四研究所独资公司,成立于1992年,资本金5000万元。公司依托44所雄厚的技术和人才优势,致力于光电子高科技产品的产业化和市场化,按照"金、贸、工、技"一体化发展战略,承启44所全方位对外合作的桥梁。渝光公司协同44所热诚欢迎国内外有志于光电子产业的企业参与合作,集中各方优势开创国内领先、有国际竞争力的光电子产业而努力。公司同时为广大用户提供国内外有源类光电子产品及服务。     

行波管多级降压收集极CAD软件研究与实现

该文讨论了行波管多级降压收集极CAD理论模型,在二维轴对称条件下,对网格自动划分技术、二次电子发射模型、空间电荷效应计算方法、外加磁场影响、收集极效率计算方法等进行了深入研究,并在现有模型基础上进行了修改,以获得更好的模拟效果。同时在此基础上,开发了行波管多级降压收集极CAD软件UESTC_MDC,并对该软件的使用进行了简单的介绍。最后根据国外研究发展动向,对我国行波管多级降压收集极CAD软件的发展提出了一些可参考的意见和建议。     

一种先进的电子CAD系统

在现代电子工程设计中,CAD起着重要作用,美国Valid公司在自动设计方面具有一流水平。为此,本文介绍了Valid CAD硬件组成、功能、软件系统及应用。其中着重列举了SUN工作站的特点,同时对各软件模块的功能进行了较为详细描述。     

行波管电子光学系统CAD技术进展

介绍了行波管电子光学系统CAD技术的基本原理和主要方法，并对国内外的发展进行了综述，同时分析了当前该领域的发展方向，为我国自主开发行波管电子光学系统软件提供一些建议供同行们参考。     

采矿工程剖面图计算机生成方法探讨

近年来,随着CAD软件在我国各种工程行业当中的普及,我国整体经济水平有了进一步的提高。可尽管如此,依照目前的情况来看,由于各项工程,特别是采矿工程,其对精确度有着更高的要求,所以,现行的CAD软件已经不能满足工程建设的需求了。于是,在这种情况之下,我国相关部门,就将CAD软件作出基础,并采用更为先进的计算机技术,设计并研制出了一种采矿工程剖面图计算机成图系统。因此,本文将针对该系统,对其进行深入的分析和探究。     

微波管器件现状及技术发展分析

综述了国内外几种主要的微波真空功率器件技术的发展现状,特别对微波管CAD技术、短（亚）毫米波器件、阴极技术等进行了分析,并对整个微波管行业面临的挑战和机遇进行了讨论。     

中国惠普与PTC举办CAD/CAM交流会

中国惠普公司计算机系统部与美国参数技术公司(PTC)于日前在京联合举办CAD/CAM系统技术交流会,向我国各界专家及用户介绍了新一代机械CAD/CAM软件——Pro/Engineer及HP9000、700系列工作站产品.PTC公司与HP公司有着良好的合作关系,HP公司是PTC公司最大的硬件合作伙伴.HP的700系列工作站采用PA—RISC技术,具有优秀的计算和图形处理能力,更结合了HP公司一贯领先的网络功能和丰富多彩的多媒体技术.     

Implementing computer-aided design: the transition of nonusers

Prior research on the social impacts of computer-aided design (CAD) has treated nonusers, those still using manual methods, as control groups to which users are compared. The assumption is that nonusers' worklives are essentially unchanged by the implementation of CAD. It is argued that nonusers can also be affected by their organization's transition to CAD. It is hypothesized that CAD has primarily job-enhancing effects for the work lives of designers selected to use CAD and primarily negative effects for the work lives of nonusers, who might fear their manual skills would soon be obsolete. Data were collected in two large manufacturing firms through a survey of 74 CAD users and 30 nonusers and through a smaller number of interviews at each site. The results indicate that, compared with CAD users, nonusers were significantly older and spent more time on support and maintenance of old designs and relatively little time on conceptual design work and new design projects     

Computer-Aided Design for Low-Power Robust Computing in Nanoscale CMOS

This work argues that the foremost challenges to the continued rapid improvements in CMOS integrated circuit (IC) performance are power consumption and design robustness. Furthermore, these two goals are often contradictory in nature, which indicates that joint optimization approaches must be adopted to properly handle both. To highlight needs in computer-aided design (CAD), we review a sampling of state-of-the-art work in power reduction techniques, and also in the newly emerging area of statistical optimization applied to very large scale integration (VLSI) ICs. The lack of CAD techniques to perform multiobjective function optimization (specifically parametric yield under correlated performance metrics) is a major limitation of current CAD research. In addition, with design trends pushing towards architectures based on aggressive adaptivity and voltage scaling, CAD researchers and engineers will need to refocus efforts on enabling this type of complex design     

Design work in change: social conditions and results of CAD use inmechanical engineering

The findings presented on the use of CAD (computer-aided design) in West Germany's mechanical engineering industry show that CAD is used in various ways by different firms and thus effects working conditions in diverse ways. The various production structures used by the single-piece, half-standardized, and standardized series producers are considered to be the most important factors for explaining this circumstance. In addition, however, the influence of various interest groups in the firms concerning the introduction process also has to be stressed. In view of their research findings, the authors argue against using the over-simplifications and rash generalizations regarding the reduction of personnel, Taylorism, and deskilling that dominated the discussion during the early days of CAD. They regard the changes taking place at the level of the microstructures of designing to be basically the general consequences of the use of CAD. These changes have until the present had little influence on the division of labor and the development of skills. The authors suggest that the latter depend on the various concepts of CAD utilization. The following trends were discovered in this respect: within the field of design, skilled jobs retain their skill level; some already deskilled jobs disappear; and new jobs are being created for CAD experts in the fields of CAD development and support     

将CIMS技术引入到PCB组装中来

PCB板组装生产线中的大多数加工设备均为数控设备。它们编程所需要的大多数特征数据均可从CAD设计系统中得到。如何在CAD设计系统和自动化加工设备之间建立起有机的联系和共享,正是CIMS所要解决的问题。因此,文章以CIMS系统中的CAD／CAM为重点,介绍了构造和设计一个电子CAD／CAM集成系统的方法和思路,以期引起更多的同行加入到该技术的研究中来。     

将CIMS技术引入到SMT生产线中来

ＳＭＴ生产线中的大多数加工设备均为数控设备。它们编程所需的大多数特征数据均可从ＣＡＤ设计系统中得到。如何在ＣＡＤ设计系统和ＳＭＴ自动化加工设备之间建立有机的信息联系和共享，正是ＣＩＭＳ技术所要解决的问题。因此，本文以ＣＩＭＳ系统中的ＣＡＤ／ＣＡＭ为重点，介绍了构造和设计一个电子ＣＡＤ／ＣＡＭ集成系统的方法和思路，以期以引导卢更多的同行加入到该的研究中来。     

“集成电路CAD”课程教学平台的构建

"集成电路CAD"是我院集成电路设计与集成系统专业的主干课程之一,涉及集成电路从设计到制造的专业知识和计算机辅助设计方法。我们在"集成电路CAD"课程建设及改革探索中,构建出双语教学等教学手段、课堂教学与课程设计相结合,辅助产学研合作教育的立体教学平台,将扎实理论基础、注重实践技能和紧跟市场需求的理念贯穿到整个教学活动过程中。     

Managing CAD systems in mechanical design engineering

The results of an investigation into the management and use of CAD systems in ten manufacturing companies are reported. The goal of the research is to understand how engineers and managers perceive CAD systems, how work is restructured when CAD is used, and what barriers prevent the effective use of CAD systems. An introduction to CAD systems is presented, followed by a brief review of the latest literature relating to computer-aided design     

微波毫米波功率单片电路CAD

从功率ＦＥＴ大信号建模、功率ＭＭＩＣ设计方法以及ＣＡＤ同工艺因素的结合等方面论述了功率单片电路的ＣＡＤ应用技术。