混合集成电路设计图纸的规范化探索

以往的ＨＩＣ设计图纸存在一定弊端，规范化设计及图纸绘制克服了它的缺点，因而具有实用价值。本文介绍了ＨＩＣ设计图纸的规范化要求与绘制规定，重点介绍ＨＩＣ几种重要设计图纸。     

HIC用AlN封装外壳设计探讨

ＡｌＮ具有高层热等优良性能，采用它制做ＨＩＣ封装外壳有着独特的特点。本文首先探讨了ＡｌＮ外壳在电性能、热性能、材料及工艺设计等方面的考虑原则，然后以设计实例验证了这些设计思想。     

逻辑加密IC卡的正向设计

介绍了逻辑加密ＩＣ卡的正向设计原理，详细；阐述了ＩＣ卡数字部分的指令设计和ＶＨＤＬ描述。最后给出了ＶＨＤＬ代码的综合及其验证，说明该设计方法是一种通用性很强的逻辑加密ＩＣ卡设计方法。     

军用混合集成电路的现状及对策(续)

军用混合集成电路的现状及对策（续）西安微电子技术研究所（西安７１００５４）王毅５．１军用ＨＩＣ的生产及应用概况经过几年的建设，国内军用ＨＩＣ的生产能力和生产技术较前大大提高，初步形成小批量多品种生产能力，军用ＨＩＣ的品种达到二百多种，并能满足质量要求...     

HICOM300系列程控交换机的系统配置

ＨＩＣＯＭ３００系列产品是时分复用、Ａ律压缩的数字程控交换机。结构设计高度模块化，可以根据不同用户的要求拼接功能模块。这样既可使ＨＩＣＯＭ系统配成一个仅有话音交换、功能较少的一般程控交换机，又可配成具有ＩＳＤＮ功能的通讯系统。本文在介绍ＨＩＣＯＭ系统的主要性能参数同时，给出四种型号，即ＨＩＣＯＭ３４０／３７０／３９０／３９１的系统配置，并且详细说明了配置用户系统时，应考虑的问题及配置方法。     

计算机辅助制图在电视灯光设计中的应用

电视灯光设计工作是一项很艰苦的案头工作，长期以来它与其他设计工作一样，需要设计人员在图板上凭借笔、纸、尺、圆规、橡皮等绘图工具，反复画画擦擦才能完成。其效率低，速度慢，既耗费大量精力和时间，而又图纸不精确，易污染，画幅大，不易施工和保存。为改变这一现状，我们尝试利用现代先进的计算机绘图技术，运用AutoCAD软件，用电脑取代了纸、笔、尺等绘图工具，大大提高绘图速度、图纸的质量和设计的水平。这种绘图办法还可进行演播室灯光设计和灯具设计，为全面提高灯光人员的素质和创作水平打下良好的基础。1用AutoCAD绘制…     

国内混合集成电路市场现状及预测

我国混合集成电路（ＨＩＣ）已从引进、消化转入自主开发。本文简介国内ＨＩＣ的市场需求和生产能力及中短期预测，国内生产厂家及引进线概况，军用ＨＩＣ的开发及其与国外市场的差距。提出我国ＨＩＣ产生发展的战略重点似应突破多芯片组件的关键制造技术。     

HIC／MCM的最佳设计和封装

ＨＩＣ／ＭＣＭ的最佳设计和封装安食弘二ＨＩＣ／ＭＣＭ对电子产品的影响大１．整机厂涉足专用ＨＩＣ／ＭＣＭ混合集成电路（ＨＩＣ）／多芯片组件（ＭＣＭ）一般分为通用品和专用品。通用品已由电子元器件厂家实现模块化，成为市售产品，但从封装方面讲，整机厂家正在涉...     

军标H级厚膜混合集成电路生产线“材料和制造工艺摸底鉴定试验方案“的设计

材料和厚膜电路四大制造工艺（成膜、粘接、键合和封装）摸底鉴定试验是厚膜电路军标线证证和ＱＭＬ鉴定工作中的一项重要内容，本文介绍了军标Ｈ级厚膜ＨＩＣ生产线“材料和制造工艺摸底鉴定试验方案”的基本设计思想、主要设计内容与试验完成情况。     

宽带微波单片集成电路技术及其应用

电子战与光传输系统是宽带微波单片集成电路（ＭＭＩＣ）的重要应用领域。传统的宽带设计技术和以它为基础的各种综合设计技术普遍用于宽带ＭＭＩＣ的设计。分布式拓扑是实现多倍频程带宽的主要设计途径。９０年代新兴的三维ＭＭＩＣ技术和ＩＥＭＴ－ＨＢＴ技术已成功地应用于宽带ＭＭＩＣ的设计和制造，显著地改善了电路，组件及电子系统的性能和功能。     

CAD图纸自动比对算法研究

为解决设计图纸差异分析问题,提出一种基于CAD电子图纸技术的自动比对算法.通过CAD技术提取图纸图元,使用快速排序和分组算法对两张图纸的图元进行快速筛选和对比,对图纸间的增加、修改、删除情况进行快速判断和渲染.实验结果表明,此算法识别准确,处理速度快,有较高的适用价值.     

Geometric matching for clip-art drawing retrieval

Currently, there are large collections of clip-art vector drawings from which users can select the desired figures to insert in their documents. However, to locate a particular drawing among thousands is not easy. Although there are some solutions for drawing retrieval, almost all of them are designed to retrieve simple and not complex drawings as for instance clip-arts. In our prior work we proposed an approach to index and retrieve complex vector drawings by content, using topological and geometric information automatically extracted from figures. In this paper, we present a new algorithm to improve the geometric matching of two drawings, which takes into account the drawing as a whole and each of the shapes in it. We developed a web search engine for clip-art drawings, where we included this new technique. Experimental evaluation reveals that this new geometric matching algorithm conducts to better retrieval results than the prior matching solution.     

可视图文中线条图形自动编辑的研究

本文提出了线条图形自动编辑的一种方法，通过对线条图形的跟踪采样获取图的信息。采样通过移动采样窗口跟踪曲线，在采样窗口内求线段的重心来实现，对获得的采样点，用模糊学的方法进行延伸与归并，以获取支撑点与支撑点之间图形元素的类型，从而实现线条图形的识别与编码。     

Coding method for vector representation of engineering drawings

Many engineering drawings exist today that are still subject to change yet do not have the benefit of computer-aided design and drafting because of the cost and difficulties associated with placing them into automated graphics systems. This paper describes a new efficient vector coding method which extracts vector information in real time from raster data acquired by optically scanning and digitizing. The resultant representation of the engineering drawing can be displayed on a CRT terminal or on a plotter as a hard copy, can be rapidly edited or revised to reflect future changes and facilitates fast transfer of drawings over telephone lines to other locations enabling remote viewing and changing. Experimental results in terms of data compaction are presented for a variety of engineering drawings, including one of the CCITT standard test documents.     

Rover reaps the benefits of EDM [engineering data management]

When Rover introduced document management in early 1994, it justified the project simply on the basis of providing an engineering drawing database. The system was designed to allow the print room to scan engineering drawings so that users could access them from the desktop rather than having to request hard copy prints. One enhancement, an improved document management release process, was initiated by a request to export CAD files from Rover's engineering data management (EDM) system into the document management system to avoid scanning of CAD drawings. This presented a problem which made the process an ideal candidate for re-engineering using document management to create a new process. This process is described and the benefits gained by Rover are outlined     

HFC网络工程图纸的绘制

工程图纸在HFC网络建设中具有很重要的作用,从以下几个方面阐述工程图纸的绘制技巧:如何获取用于工程图纸设计的参照图;实地调查的重要性;比例尺转换的好处;工程图纸的绘制方法及形式。     

Highly efficient coding schemes for contour lines based on chaincode representations

The encoding schemes utilize the first- and second-order Markov models to describe the source structure. Two coding techniques, Huffman encoding and arithmetic encoding, are used to achieve a high coding efficiency. Universal code tables which match the statistics of contour line drawings obtained from 64 contour maps are presented and can be applied to encode all contour line drawings with chain code representations. Experiments have shown about a 50% improvement on the code amount over the conventional chain encoding scheme with arithmetic coding schemes, and also have shown a compression rate comparable to that obtained by T. Kaneko and M. Okudaira (1985) with Huffman coding schemes, while this implementation is substantially simpler     

线条画矢量化研究

针对图案设计中无法由图像文件直接设计艺术风格的问题,提出一种线条画图像矢量化的方法。现有的研究工作或者根据矢量线条进行图案设计,或者根据图像抽取线条画,文章的工作可以结合这两类方法完成从图像到各种风格的艺术图案的设计。实现过程包括图像二值化、图像细化、线条追踪和宽度获取几个步骤,文章最后给出了实验结果。     

ACCEL: Automated circuit card etching layout

Printed circuit board design time can be greatly reduced by the use of a computer program called ACCEL developed jointly by Sandia Corporation and the Thomas Bede Foundation under contract to Sandia. The ACCEL program designs printed circuit boards and proceduces the drawings for their construction. The program is designed to handle components with up to four leads each. The input is encoded from an engineer's schematic diagram by a clerk with no knowledge of electronics. The computer edits the schematic data, places the components on the board, and generates the interconnections between components, all in one run. The outputs of the program are a schematic, parts list, printed circuit etching negative, assembly drawing, and a hole drilling list. The program is written in FORTRAN II for the IBM 7090 computer and the drawings are produced on the Stromberg-Carlson 4020 cathode ray tube plotter.     

Groove guide and H-guide: Supplementary information

Interest in groove guide and H-guide for application at millimeter waves is considerable at present. Hitherto unpublished material dealing with these waveguides is presented. The early history, patent applications, drawings and prototypes are described.