一种基于重用和快速开发的系统控制软件架构设计

随着装备的发展,系统控制软件规模越来越大,研制周期变短,多平台并存,要求系统控制软件能充分继承重用已有项目成果,快速完成软件研制.原有系统控制架构已不能满足这种要求.根据系统控制的组成、功能及使用特点,分析了软件架构在重用和效率方面的技术要求,设计了一种基于重用和快速开发的系统控制软件架构.该架构统一了信息交互方式,实现了功能组件化/插件化,组件/插件集成配置化,具备多平台适应、外部框架适配能力,支持基础功能预集成.该软件架构能够实现软件级、组件级、插件级的多层次高效重用和快速开发,将在后续系统控制软件中推广使用.     

IP重用和嵌入式SOC开发的逻辑方法

硅芯片技术的飞速发展给SOC设计带来新的危机.为了保持产品的竞争力,新的通信产品、消费产品和计算机产品设计必须在功能、可靠性和带宽方面有显著增长,而在成本和功耗方面有显著的下降.     

Design of Two‐Stage Class AB CMOS Buffers: A Systematic Approach

A systematic approach for the design of two‐stage class AB CMOS unity‐gain buffers is proposed. It is based on the inclusion of a class AB operation to class A Miller amplifier topologies in unity‐gain negative feedback by a simple technique that does not modify quiescent currents, supply requirements, noise performance, or static power. Three design examples are fabricated in a 0.5 µm CMOS process. Measurement results show slew rate improvement factors of approximately 100 for the class AB buffers versus their class A counterparts for the same quiescent power consumption (< 200 µW).     

实现测试复用的SOC设计中的测试结构

在系统芯片SOC(system on a chip)设计中实现IP核测试复用的芯片测试结构一般包含两个部分：1)用于传送测试激励和测试响应的片上测试访问机制TAM;2)实现测试控制的芯片测试控制器。文章分析了基于测试总线的芯片测试结构,详细阐述了SOC设计中测试调度的概念,给出了一种能够灵活实现各种测试调度结果的芯片测试控制器的设计。     

IGBT结构设计发展与展望

首先从绝缘栅型双极性晶体管(IGBT)的物理模型展开讨论,分析了影响IGBT性能的几个重要特性参数,对其结构的优化和改进提供了理论支撑。其次论述了IGBT问世以来的主要结构设计发展历程,以及国际主流IGBT设计厂商对各自IGBT产品结构做出的独创性改进。最后对目前研究的新技术热点如逆导型IGBT半导体器件进行了介绍,并对IGBT器件的发展方向提出展望。     

Need for Broadband Infrastructure in a 2020 Perspective

The need for broadband capacity in the access networks by 2020 is discussed in this paper. A large range of countries around the world has decided to strengthen their resolve to have their broadband infrastructures built out and upgraded. The size of bandwidth requirements is, however, not an issue, which has been subject to much analysis from an academic angle whereas a number of consultancy reports with estimations on bandwidth needs for different services can be found. The needs for broadband access up until 2020 are discussed by scrutinizing the different services and applications requiring bandwidth. The bandwidth requirements in question are those of residential users and SMEs. In the paper it is assumed that users of broadband connections will use broadband for all their digital communications and further the paper focuses on the requirements for bandwidth notwithstanding the pricing of access. It is the estimated bandwidth need and not the actual demand, which is the subject of analysis. Scenarios including different types of households and different kinds of SMEs are presented.     

Interconnect Modeling: A Physical Design Perspective

Variability, reliability, and design size are becoming major difficulties in system-on-a-chip (SoC) designs as the scaling of semiconductor technology advances. Techniques for interconnect modeling and analysis in designing advanced SoCs are discussed from the design-automation point of view. Importance of interconnect modeling in modern chip-design flows is first summarized. State-of-the-art physical-design techniques for parasitic extraction, signal-integrity analysis, and timing analysis (which are commonly executed throughout the final verification of physical design) are then reviewed. The extraction and analysis require the most accurate process information and modeling. Requests with respect to the manufacturing–design interface are discussed, and the authors' perspective concerning future SoC physical designs is addressed with emphasis on interactions between manufacturing and design technologies.      

BSP构件的开发与复用方法

为了解决传统BSP开发难度大、研发周期长、通用性差、复用率低的弊端,在对BSP的功能结构、开发方法进行分析之后,设计了一种模块化、层次化的可复用BSP。结合软件工程与构件复用技术,提出了新的BSP开发方法。可在BSP项目开发过程中,减少重复劳动,提高开发效率,保证软件质量,增加技术积累。     

分层数字化图书馆基础架构的设计

用面向对象方法提出了分层数字化图书馆基础架构LDLI的设计方案，详细分析了LDLI中3个子系统的原理与设计，最后对今后的发展方向提出了一些建议。     

SOC设计中的硬核复用及其工艺移植

IP复用已成为SOC(system-on-chip)芯片设计的主要手段之一.以一款0.18 μm工艺下的温度控制芯片设计为例,具体介绍硬核复用设计的工艺移植问题,并给出了一种基于工艺设计工具包的设计流程及其关键技术解决方案.该设计流程在保证电路功能正确性的同时,又可以减少版图设计的设计周期,可以为其他类似硬核的复用设计提供参考.     

基于PKI/PMI的授权管理模型设计

随着计算机应用系统的日益庞大,用户身份认证、访问控制和权限管理成为应用系统安全关注的焦点。如何结合PKI、PMI技术为应用系统提供一种统一的身份认证、授权管理和访问控制是论文想要探讨的问题。文中介绍了一种基于PKI的PMI授权管理访问控制模型,并提出了基于属性证书实现访问控制的方法。     

Project Safeguards: Operationalizing Option-Like Strategic Thinking in Infrastructure Development

When business strategists use option-like thinking to inform investments in physical infrastructure, developers need to operationalize leaving the options open at project implementation. This study defines safeguard as the design and physical development work for ensuring, or enhancing, the embedment of an option in the project outcome. Safeguards account for design changes stemming from option exercising if the environmental uncertainties resolve favorably in the future. They range from a design effort to secure space in a master plan (passive) to the construction of an integral component (active). A multiple-case study on the expansion of Heathrow airport shows how the confluence of two contingencies underscores decisions to safeguard under a limited budget. Safeguarding is more attractive when: 1) the assumed uncertainty that the option will get in the money is low because the outlay sunk on safeguards is more likely to pay off; and 2) the infrastructure architecture is modular because only the interfaces between components may require safeguarding. Irreversible investments on safeguards increase the option cost and reduce the exercising costs in the future. Safeguards therefore play out as a control point for strategic option-like thinking at project implementation. The empirical findings are summarized in a conceptual framework.     

PONIARD: A Programmable Optical Networking Infrastructure for Advanced Research and Development of Future Internet

Motivated by the design goals of Global Environment for Network Innovation (GENI), we consider how to support the slicing of link bandwidth resources as well as the virtualization of optical access networks and optical backbone mesh networks. Specifically, in this paper, we study a novel programmable mechanism called optical orthogonal frequency division multiplexing (OFDM)/orthogonal frequency division multiple access (OFDMA) for link virtualization. Unlike conventional time division multiplexing (TDM)/time division multiple access (TDMA) and wavelength division multiplexing (WDM)/wavelength division multiple access (WDMA) methods, optical OFDM/OFDMA utilizes advanced digital signal processing (DSP), parallel signal detection (PSD), and flexible resource management schemes for subwavelength level multiplexing and grooming. Simulations as well as experiments are conducted to demonstrate performance improvements and system benefits including cost-reduction and service transparency.      

芯片I/O缓冲及ESD电路设计

文章详细介绍了基于CMOS的芯片I/O缓冲电路分类,功能,电路及版图设计的一些考虑以及芯片引脚的静电保护问题.     

Systems Development Process Improvement: A Knowledge Integration Perspective

Although organizations have applied a variety of practices and tools to address information systems development (ISD) performance problems, most of these approaches have focused on controlling and improving predictability of the development process. There is growing recognition that ISD is a knowledge-intensive process that requires the integration of specialized stakeholder knowledge. We develop the perspective that integration of this specialized knowledge across knowledge boundaries in the ISD process drives ISD performance. We theorize that formal and informal organizational integrative practices influence ISD performance, because they facilitate the development of boundary objects that effectively span knowledge boundaries. Results from a field study of 110 firms provide considerable support for the proposed model. This paper makes three novel contributions to the technology management literature. First, it demonstrates that knowledge integration across knowledge boundaries through boundary objects improves ISD performance. Second, it shows how formal and informal organizational integrative practices enhance the integration of specialized knowledge within and across organizational subunits. Third, it shows that the positive influence of formal and informal organizational integrative practices on ISD performance is partially mediated by knowledge integration. For engineering and technology managers, the results highlight the centrality of knowledge integration for the management of technology development. Collectively, these findings offer a novel knowledge integration-based perspective that complements prior research on systems development and new product development     

大数据时代网络基础架构的思考

随着大数据时代的到来,网络需要从基础架构到上层应用等各方面做好准备,本文聚焦于网络基础架构侧,从机房建设规模、布局、网络带宽与质量要求等方面探讨如何整装待发,迎接大数据时代。     

商用密码基础设施的现状和发展趋势

论文从密码技术、知识产权以及相关标准规范等人手,详细介绍了国家商用密码基础设施的发展现状,提出商用密码应用中存在的几个主要问题。同时,文章论述了建立完善的商用密码基础设施的意义和必要性,并针对现状和问题对今后商用密码基础设施的发展趋势进行了阐述。     

数据通信和信息网国际发展动向

本文概括介绍了近两年来国外数据通信业务和网络技术的发展动向及信息高速公路（宽带网）开发情况，内容主要有计算机网络的发展、多媒体技术、Ｉｎｔｅｒｎｅｔ以及网络基础设施建设。     

智慧城市发展中的基础设施升级和公共服务提供

基础设施升级是智慧城市建设的基础条件,公共服务提供则是智慧城市发展的重要方向,本文结合中欧绿色智慧城市合作试点在基础设施升级和公共服务提供两个方面的成功实践与经验,探讨分析了现有智慧城市发展中存在的相关问题,提出了智慧城市发展的指导性建议,为我国智慧城市发展提供了借鉴和帮助。