基于VHDL实现8086 IP核的设计

本文介绍了8086的内部结构和工作原理,其中包括执行单元、总线接口单元、算术逻辑单元、寄存器组和地址加法器。使用VHDL实现了IP核的设计,并使用Modelsim进行了仿真,仿真结果表明IP核可以正常工作。     

汽车电子控制单元ECU的设计

本文给出了汽车电子控制单元ECU的IP核设计。该IP核基于RISC技术的单指令、单周期的体系结构,并采用了自顶向下(top-down)的设计方法和硬件描述语言VerilogHDL,给出了ECU的体系结构以及各个功能模块的具体设计和仿真结果。     

基于Avalon总线的8051 MCU IP核的设计

设计了一款基于Avalon总线的8051MCU IP核。它支持MCS一51指令集,优化内部结构,通过采用流水线技术、指令映射技术、指令预取技术、微代码技术等极大地提高了IP核的工作速度,使IP核在100 MHz时钟下,能够单周期执行一条指令。本设计使用Modelsim软件完成了功能仿真和时序仿真,并在以Altera公司的Cyclone Ⅱ FPGA芯片为核心的DE2开发板上完成了硬件验证。     

嵌入式图形处理器裁剪引擎的设计

以计算机图形学为基础,文章设计了一种具有较好通用性的嵌入式图形处理器裁剪引擎。重点剖析了裁剪算法和裁剪引擎RTL级模型的设计,该模型采用Verilog HDL实现引擎的IP软核,并在QuartusⅡ环境中完成IP核的功能仿真与时序验证。综合后,IP核占用FPGA资源为9489逻辑单元,实现了对图形进行裁剪的任务,达到了预期的设计要求。     

嵌入式图形处理器中几何变换引擎的设计

针对嵌入式系统处理三维图形时需要良好的实时性要求,提出使用专用嵌入式图形处理器负责图形处理,用以缓解CPU负担,提高处理速度的解决方法。几何变换引擎位于图形处理器内部图形流水线的第一级,负责处理三维图形在空间坐标系中的位置变换。设计了几何变换引擎的架构模型,采用Verilog HDL实现引擎的IP软核,并在Modelsim和QuartusII环境中完成IP核的功能仿真与时序验证。综合后,IP核占用FPGA资源为9715逻辑单元,单顶点的处理时间为160ns,实现处理图形几何变换的任务,达到预期设计要求。     

FPGA的高速多通道数据采集控制器IP核设计

介绍基于FPGA嵌入式系统的多通道高速数据采集模块控制器的IP核设计。采用TI公司的6通道同步采集A／D转换器件（ADS8364）,针对该器件使用硬件描述语言设计IP核,实现对采集数据的处理,同时设计了IP核与嵌入式系统的接口。在Xilinx公司的ISE开发工具中,利用FPGA器件中的硬FIFO控制器辅助设计IP核,利用嵌入式开发工具EDK建立FPGA嵌入式系统,并添加和修改了用户自定义IP核,通过仿真验证了该方法的实效性。     

Avalon总线的音频编解码控制器IP核设计

介绍了基于Avalon总线的WM8731音频编解码控制器IP核的设计,包括音频数据访问接口模块和Avalon-MM接口模块等,并利用SOPC技术将其封装成可重用的IP核.自定义IP核的使用,有效降低了该芯片的开发难度,同时也使系统易于扩展和升级,具有较高的灵活性.在Quartus Ⅱ和ModelSim下使用VHDL语言完成了控制器的设计、仿真以及Nios Ⅱ系统的构建,并通过SignalTap Ⅱ逻辑分析仪进行了硬件测试.仿真和测试结果表明,该控制器满足WM8731各项时序要求.     

全功能硬件扫描键盘控制器IP核的实现

在深入分析扫描键盘工作原理的基础上,给出了一款结构经参数化的全功能硬件扫描键盘控制器的实现方案、参数化方法与仿真结果,并由此阐明了IP核设计的一般步骤。实际应用表明,所实现的IP核经例化后消耗的硬件资源少、使用灵活、工作可靠,可在一定程度上简化大型系统的软硬件开发过程。此外,设计中使用的原则、方法与技巧对同类设计乃至大型设计有较好的参考价值。     

基于FSMD模型的IP集成方法

提出了一种利用IP核的约束条件和集成系统的约束条件的集成方法，将IP核的约束条件用IP执行模型和IP延迟模型表示，用FSMD模型分别构造IP执行模型和集成系统的约束，以便于将它们合并起来优化设计IP接口单元，实现IP核在系统层合成。     

基于SOPC系统的JPEG解码IP核设计

给出了一种在可编程片上系统(System on programmable chip,SOPC)中实现JPEG解码的IP核设计方案,将JPEG解码算法中大量的运算采用硬件实现,嵌入式处理器只参与很少的一部分工作,从而大大提高JPEG的解码速度。本文分析了JPEG解码的原理,使用硬件语言构建了Huffman解码、反量化、反离散余弦变换等模块,完成了JPEG解码器的设计。仿真和测试结果表明,使用SOPC设计的JPEG解码IP核具有高性能、高效率且使用灵活、低成本等特点。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.