高功率速调管发射机的防护设计

雷达装备的防护设计直接与系统设计、电讯设计、结构设计、工艺设计、计划与生产管理等相关联,是一门复杂的涉及多专业的系统工程。针对海洋大气环境的具体特点,详细阐述了高功率速调管发射机的环境适应性防护设计方法,从电讯设计、结构设计、工艺设计等方面给出了具体而有效的防护设计措施,具有广阔的应用和参考价值。     

测试与可测试性设计发展的挑战

CMOS器件进入超深亚微米阶段,集成电路(IC)继续向高集成度、高速度、低功耗发展,使得IC在测试和可测试性设计上都面临新的挑战.本文首先介绍了测试和可测试性设计的概念,分析了测试和可测试性设计面临的困境;然后讨论了系统芯片设计中的测试和可测试性设计,最后对测试和可测试性设计的未来发展方向进行了展望.     

Synthesis of area-efficient and high-throughput rate data formatconverters

This paper proposes two design methodologies for synthesis of area-efficient data format converters (DFCs) with high throughput rate. DFCs are grouped into various classes according to the specification of design parameters. The first design methodology is suitable for design of many representative classes of DFCs. The designs using this methodology are based on a two-dimensional (2-D) architecture. They have maximum throughput rate and are area-efficient. Various design examples are shown to demonstrate improved performance, flexibility and usefulness of this design methodology. For several representative problems, the area requirements of our designs are compared against those obtained by earlier design methodologies. For all the problems considered, this methodology leads to compact designs. The second design methodology employs an architecture using dual buffers. The simple and regular architecture using dual buffers leads to area-efficient DFCs. The design procedure using this methodology is simple and can reduce the design effort in many applications     

大庆教育文化中心大剧场录音室声学设计

录音室的声学设计是录音室设计中的技术核心部分,主要包括背景噪声控制和混响时间控制.声学设计工作有隔声减振设计、体型扩散设计、吸声装修设计、空调消声设计等几方面,涉及建筑、结构、空调和装修等工种.以大庆大剧院录音室声学设计为例.详细介绍了录音室声学设计的过程和工程经验.     

雷达系统测试性设计

良好的测试性设计对雷达系统而言,可以有效地提高其维修性、保障性,降低全寿命周期费用。简要回顾了测试性的发展,指出了测试性设计对雷达系统的重要性和必要性,并给出了雷达系统的测试性设计的基本原则。从网络化设计、分层次设计、外场可更换模块（LRM）设计、校正维护设计和故障诊断设计等方面详细介绍了雷达系统的机内测试（BIT）设计,对原位检测设计和自动测试设备（ATE）设计进行了简要介绍。随着雷达技术的不断发展,在BIT技术、ATE技术进行创新发展的同时,还应积极探索综合诊断技术、预测和健康管理（PHM）技术等新的诊断方法在雷达系统测试性设计中的应用。     

结构设计在电子设备中的重要性研究

在分析当代电子设备结构特征及环境对其影响的基础上,讨论了电子设备在结构设计中需要考虑的问题,并从热设计、电磁兼容设计和防腐蚀设计三个方面详细介绍了结构设计的重要性和设计方法。     

The applicability of computer-aided design as a system engineering tool

The morphology of design and the process of design are examined in an effort to establish a commonality between component and system design which would permit the expansion of design automation. The characteristics of a design problem that make it amenable to computer-aided design (CAD) are defined. The capabilities of CAD for the solution of these problems are analyzed and the difficulties facing the implementer outlined. It is concluded that a methodology for CAD development is essential to its use as a system engineering tool and that among the other needs are: commonality of programs, transferability of programs, better efficiency, and standardization of tools and techniques.     

车载箱参数化设计

针对国外自行车上的可快速装卡的车载箱进行产品造型及模具设计。为了达到模具设计方便快捷的目的,采用了UG软件的参数化设计功能。在做产品造型及其模具设计时,所有设计参数都保存在数据库中,并且全部的尺寸数据之间利用表达式建立起联系。当某一尺寸改变后,产品模型的整体尺寸会随之改变,即可实现参数化驱动。最后应用Moldwizard模块完成对产品的模具设计。实践证明,采用参数化的设计方法,可以减少系列产品造型及其模具的重复设计,大大提高设计速度和工作效率。     

Toward more compatible human-computer interfaces

Some poorly understood aspects of human-computer interfaces are identified. The use of guided evolution, or interactive design, to guarantee design flexibility by intentionally leaving some system options open during the early stages is discussed. The importance of evaluating a product design as it is evolving and funneling the results constantly back into the design is stressed, and some methods for doing so are briefly described. Principles recognized by system developers as applicable to interface design in general, independent of the anticipated end use, are presented. The need to design interfaces that meet the needs of both novice and experienced users is considered. Speculations on future systems are offered     

Design of a boost power factor correction converter using optimization techniques

This paper presents an approach to continuous variable design optimization of a power electronics converter. The objective of the optimization approach is to minimize the total component cost. The methodology is illustrated with the design of a boost power factor correction front-end converter with an input electromagnetic interference filter. The system design variables are first identified. The relevant system responses and component costs are then expressed as a function of these design variables. Finally, by using mathematical optimization techniques, the design variable values that minimize the total system component cost are obtained, given practical constraints on these design variables and system responses.     

集成电路设计方法新进展

文章首先简单回顾了近两年来我国集成电路设计技术的现状,然后详细阐述了基于IP的设计方法、基于平台的设计方法。同时对混合信号集成电路设计方法和DSP的设计新方法进行了探讨。最后讨论了基于IP重构的设计方法和90nm以后集成电路设计方法中的一些热点问题。     

双色大面阵量子阱红外探测器读出电路设计

以双色量子阱640×512读出电路的设计为例阐述大面阵读出电路的设计要点,分模块详细说明了设计思路和具体电路结构,给出了电路仿真结果和实测结果,最后从电路、版图的角度分析了双波段大规格读出电路的一些设计要点。     

机载无源相控阵雷达天线的维修性设计

文中提出了机载无源相控阵天线维修性存在的难度,介绍了天线维修性设计要求和几种典型的维修性设计方式,指出了各种维修方式对环境条件的要求及其优、缺点探讨了天线维修性设计的改进途径。对提高系统的"三性"设计也作了初步探讨。     

Considerations in producibility engineering of MMIC's

The topics covered are monolithic microwave and millimeter-wave integrated circuit (MMIC) chip design methodologies, chip design tools, module design methodologies, and module development tools. Various aspects of producibility engineering at both the chip and the module level are addressed in terms of developing prudent design methodologies and design tools to enhance the accuracy of simulation tools at the circuit and module levels. Producibility engineering considerations are presented for MMIC chips and modules. In each category, relevant approaches and some of the innovative design tools are highlighted     

A design paradigm for mechatronic systems

Concepts of mechatronics are applicable in the design of complex and multi-domain dynamic systems. This paper presents an approach based on the mechatronic design quotient (MDQ) for systematic design of a mechatronic system. Traditional procedures of design are hierarchically separated into topological design and parametric design. Extending this concept, an MDQ may be “structured” into a multi-layered hierarchy. The approach and significance of the application of MDQ in mechatronic design are indicated using illustrative examples.     

基于CPLD／FPGA的VHDL语言电路优化设计

VHDL电路的优化目标是充分利用CPLD／FPGA芯片的内部资源,使设计文件能适配到一定规模的CPLD／FPGA芯片中,并提高系统的工作速度和降低系统成本。分析VHDL语言的特点,并从设计思想、语句运用和描述方法等方面对电路进行优化,提出了利用串行化设计思想和外扩E^2PROM的方法对VHDL电路进行优化,通过对比实验,验证了这两种方法能有效减少程序占用的宏单元（Macro Cell）。     

浅谈Auto CAD 在LCD中的应用

详述最新版计算机辅助设计软件Auto CAD2000在液晶显示器制作过程掩 膜版设计中的应用。根据实际设计经验，介绍使用该软件的方法和技七，给出Auto CAD在生产液晶显示器过程曝光用掩膜版设计中所需要的各种相关命令。     

窄脉冲激光探测电路分析与设计

光电检测电路的设计对激光探测系统的性能有重要的影响。针对窄脉冲激光的时域特性,对窄脉冲激光电路设计进行了详细的分析,包括光电二极管的偏置电压对检测电路的影响、光电流转换方式对信号带宽影响等。为提高探测系统信噪比,对放大电路、补偿电路的带宽设计提出优化方法,给出窄脉冲激光探测器的前级放大电路参数设计的依据,并对探测电路优化及设计方法进行了详细论述,为光电检测电路的设计提供了有效的设计方法。