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cad     
相关语句
  计算机辅助设计
     CAD/CAM IN MANUFACTURING ENGINEERING
     机械制造工业自动化技术——计算机辅助设计(CAD)与计算机辅助制造(CAM)
短句来源
     LQGSP—A CAD Software Package for the LQG Systems
     LQGSP—线性二次型高斯控制系统的计算机辅助设计软件包
短句来源
     A General Purpose CAD Program For Microwave Linear Circuits
     一个通用微波线性电路计算机辅助设计程序
短句来源
     CAD OF HYBRID CONNECTED STRUCTURE MICROWAVE NETWORK
     混联结构微波网络的计算机辅助设计
短句来源
     CAD Package For Digital Controller Design
     数字控制器的计算机辅助设计程序包
短句来源
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  冠心病
     The Study on Vulnerable Blood in the Elderly Male Patients with CAD and Effect of Hcy on the Expression of TM and TFPI in ECV304 Cells
     老年男性冠心病患者脆性血液的临床研究及Hcy对内皮细胞表达TM和TFPI的影响
短句来源
     Maximal ST segment/heart rate slope and its use in coronary artery disease(CAD) rehabilitation/
     最大ST段/心率斜率及其在冠心病康复中的应用(Ⅰ)
短句来源
     Maximal ST segment/heart rate slope and its use in coronary artery disease (CAD) rehabilitation(Ⅱ)
     最大ST段/心率斜率及其在冠心病康复中的应用(Ⅱ)
短句来源
     Evaluation of left ventricular diastolic function of CAD patients by radionuclide ventriculorgraphy
     核素心室造影二阶微导分析法评价冠心病患者左室舒张功能
短句来源
     Changes of 5-HT_(2A) Receptor Binding on Platelet of Patients with CAD and the Effects of Exercise Test
     冠心病患者血小板5-羟色胺_(2A)受体变化及运动试验的影响
短句来源
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  辅助设计
     CAD/CAM IN MANUFACTURING ENGINEERING
     机械制造工业自动化技术——计算机辅助设计(CAD)与计算机辅助制造(CAM)
短句来源
     LQGSP—A CAD Software Package for the LQG Systems
     LQGSP—线性二次型高斯控制系统的计算机辅助设计软件包
短句来源
     A General Purpose CAD Program For Microwave Linear Circuits
     一个通用微波线性电路计算机辅助设计程序
短句来源
     CAD OF HYBRID CONNECTED STRUCTURE MICROWAVE NETWORK
     混联结构微波网络的计算机辅助设计
短句来源
     CAD Package For Digital Controller Design
     数字控制器的计算机辅助设计程序包
短句来源
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  cad技术
     CAD Research on Electronic Optics System of Traveling Wave Tube
     行波管电子光学系统CAD技术研究
短句来源
     Exploration of CAD Technique Prospects
     对CAD技术发展前景的探讨
短句来源
     THE APPLICATION OF CAD TECHNIQUE IN FEM NET GENERATION
     CAD技术在有限单元法网格形成中的应用
短句来源
     Application of CAD techniques in the design of marine cas turbine
     CAD技术在舰用燃气轮机设计中的应用
短句来源
     CG&CAD TECHNIQUE IN ARCHITECTURE MODELING
     建筑造型设计中的CG&CAD技术
短句来源
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  cad
In the application of CAD/CAM, the target form of a curve, which is used for plotting or as the data supplied for CAM, is a set of points on (or near by) the curve.
      
The results show that the method is not only simple, feasible and reliable but also compatible with a CAD system using NURBS.
      
To design various optimum parameters and simulate the working process of CP single-screw compressor, the Computer-Aided Design (CAD) system for the CP single-screw compressor has been established.
      
A new method based on computer graphics technology, database technology, object-oriented programming technology, and visual simulation technology has been adopted in this CAD system.
      
The experimental results show that the CAD system for the CP single-screw compressor is practical and feasible.
      
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As a part of the LSI CAD, a software for CAD photomask-ZB-761 was designed and put into use on a DJS-130 computer in 1976. Since then several dozens of IC photomasks have been made. The input language of software has better ability to describe IC mask graph. The data structure is so designed that it enables a minicomputer without an external memory, such as a DJS-130 computer, to handle the vast data of mask graph. By optimizing the object program the working time of specific photomask equipment...

As a part of the LSI CAD, a software for CAD photomask-ZB-761 was designed and put into use on a DJS-130 computer in 1976. Since then several dozens of IC photomasks have been made. The input language of software has better ability to describe IC mask graph. The data structure is so designed that it enables a minicomputer without an external memory, such as a DJS-130 computer, to handle the vast data of mask graph. By optimizing the object program the working time of specific photomask equipment is greatly reduced. It also has the ability to check data and to perform manmachine dialogue to a certain extent. In this paper, the particular features of input language, data structure, transformation algorithm of the compiler and optimization for the object program etc. are described in some detail. The schemes of the implementation of LSI mask design automation are also suggested.

计算机辅助制版软件ZB-761是作为大规模集成电路计算机辅助设计的一个组成部分而设计的,且于1976年在DJS-130计算机上投入运行。至今已制作了数十套集成电路掩膜版。 软件的输入语言具有较强的描述集成电路版图的能力。其数据结构使得像DJS-130这样的小型计算机(没有外存贮器)能处理大量的版图数据。由于进行了目标程序的优化,使得专用制版设备的制版时间大大地缩短了。另外,软件还具有一定的数据检查和人机对话的能力。 本文较详细地介绍了软件输入语言的特点,数据结构,编译中的变换算法和目标程序的优化等。并对大规模集成电路版图设计自动化提出了一些设想。

This is a summary of CAD/CAM in manufacture engineering. In pant Ⅰ a general review of application of computer in mechnical engineering and discription of CAD/CAM system is given. In part Ⅱ a definition, situation of CAD and computertechnique for CAD are descripted. Part Ⅲ discusses centent, situation of CAM and computer technique for CAM.Finally some developments of CAD/CAM in manufactureengineeringare considered.

本文对机械制造工业自动化技术——计算机辅助设计和辅助制造在国外的现状和发展进行了综述。概论中简介了这种技术在机械制造工业自动化中的作用。第二部分叙述了CAD的含义、现状,所要求的计算机技术以及国外应用CAD技术的几方面的情况。第三部分讨论了CAM的含义、现状和所要求的计算机技术。最后就国外技术预测叙述了今后的发展。

In this paper, we present a concise device physics theory for I2L family. The core of the integrated injection logic family which includes I2L, I3L, S2L, SFL, SI2L and 3JL etc., is composed of three mutually interactive PN junctions.By making use of the'Total Number of Excess Minority Carriers"mothod, and starting from the integral form of the continuity equation, we shall relate the terminal current of I2L with the total mumber of excess carriers, which are functions of the junction voltages. The theory can...

In this paper, we present a concise device physics theory for I2L family. The core of the integrated injection logic family which includes I2L, I3L, S2L, SFL, SI2L and 3JL etc., is composed of three mutually interactive PN junctions.By making use of the'Total Number of Excess Minority Carriers"mothod, and starting from the integral form of the continuity equation, we shall relate the terminal current of I2L with the total mumber of excess carriers, which are functions of the junction voltages. The theory can be used to compute the recombination losses of various regions. The culculated results can be used to understand and to design the I2L family, and the parameters are also measurable from the circuit characteristic point of view.Taking the I2L LSI or VLSI as a single device, We can specify and measure the static input and output characteristics.It exhibits various regions of operation.For each of these various modes of operation, we can simplify the analysis, and obtain, with appropriate approximation, simple equivalent circuits, which can be used for CAD.The Eber-Moll and Gummel-Poon models are useful for junction transistors. However, these models are insufficient for three mutually interactive junctions. Especially for the dynamic behavior of I2L, it is necessary to consider the building up or decaying of the "Total Number of Excess Carriers" in the entire I2L. The charging and discharging currents are no more constants as that has been assumed in the "Charge control" theory. Simplified equations will be given for the dynamic analysis of I2L. This analysis provides useful basic principles for the device design theory and the circuit design theory.

本文叙述了注入型电路的器件物理。注入型电路包括I~2L、I~3L、S~2L、SFL、SI~2L以及3JL等,它们的核心是三个相互作用的PN结。 采用“过剩少数载流子总量”的方法,从电流连续方程的积分形式入手,给出了注入型电路端点电流与“过剩少数载流子总量”,以及端点电压之间的关系,由此可以计算出各区域的复合损失。计算结果可用来理解和设计注入型电路。从线路的角度来看,这些参数也可直接测得。 文中给出了可测的注入型大规模集成电路的静态输入和输出特性曲线族。这些特性曲线族包括了各种工作区。对于各种工作区域,可简化为简单的等效电路,用来进行线路和器件的设计,也可用于计算机辅助设计。 E-M和G-P模型对于描述结型晶体管是很完善的,但是不能充分描述三个结之间的相互作用。因此,特别是对于注入型电路的动态分析,还须考虑注入型电路各区域的“过剩少数载流子总量”的建立和消失过程,这时充、放电电流都已不是常数。本文给出了简化的动态分析方程,这些方程有助于器件和线路的设计。

 
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