基于FPGA的热电偶温度巡检仪设计

目前工业生产中要求对温度的测量能够面向多目标且及时、精确.为了满足这些要求,以FPGA (EP2C5Q208C8N)为核心设计了一种热电偶温度巡检仪,以K型热电偶作为测温传感器,并采用专用集成芯片MAX6675对K热电偶进行冷端温度补偿及线性化处理,利用Autium进行硬件电路绘制及PCB制作,并在Quatusll中进行了时序仿真,仿真波形验证了设计的正确性.将FPGA应用到热电偶温度巡检仪中使其测温过程更加精确迅速,及时的测温和反馈使得工业生产中的高温作业有了更高的保障.     

基于FPGA的PC机声卡语音采集系统的设计

本文介绍了一种基于FPGA的PC机声卡语音采集系统的设计方案,以FPGA芯片和声卡芯片为核心,通过编程实现FPGA对PC机声卡、SRAM、IDE接口和RS232等的控制和数据交换,给出了仿真图,经仿真,该系统能很好的达到设计要求。     

基于Testbench的FPGA实物自动化测试环境设计

针对FPGA软件测试过程中仿真测试和实物测试的不足,提出了一种基于仿真测试用例的实物自动化测试环境,将用于仿真测试的Testbench进行解析处理,形成能够用于FPGA实物测试的传输信号,通过执行器将此信号转换为作用于被测FPGA芯片的实际信号,并采集被测FPGA芯片的响应,实现对FPGA的实物自动化测试。采用实物自动化测试环境验证平台对设计架构进行了验证,取得了良好的效果。     

基于FPGA的视频解码芯片验证平台设计

随着视频编解码算法复杂度的增加,视频处理器设计的难度和成本也大幅度增加.针对视频解码器芯片的仿真和验证要求,文章提出了视频解码芯片的验证框架.基于VirtexE系列的FPGA芯片设计实现了视频解码器的验证平台.并对视频解码器的FPGA的验证问题进行了分析.     

基于FPGA的音频处理芯片的设计

提出一种采用现场可编程门阵列器件FPGA实现音频处理芯片的方案。首先对FIR滤波器的算法进行了改良，然后采用VHDL语言对音频处理芯片的每个模块分别设计。最后通过计算机软件对该芯片进行仿真，给出仿真波形和仿真结果．证明本芯片的设计达到了预期要求。     

基于FPGA的串行多节点数据采集传输系统的应用研究

多节点分布式传感器的数据采集与传输系统有着广泛的应用,其物理层实现主要分为串行及并行两种方式。针对特定的应用场景,选用串行传输的实现方式,设计以FPGA芯片、RS485芯片及AD芯片为核心的硬件平台,使用verilog语言设计FPGA的RTL（Register Transfer Level）逻辑代码,并在Modelsim中完成了功能仿真验证。最终实现了物理层为串行传输、传输层为总线模型的数据采集传输系统,该系统RTL代码设计简单,维护性强,可靠性高,占用芯片资源少,具有一定的工程应用价值。     

基于FPGA的2FSK调制解调器设计与仿真

本设计根据2FSK调制与解调数字信号基础理论原理,基于FPGA芯片设计了一种2FSK调制解调器。由于考虑到整体流程及成品排错的便捷,整体采用层次化、模块化的方法进行设计,在实现调制方面采用传统数字键控方法;在实现解调方面采用过零检测的方法。硬件芯片采用FPGA EP2C5T144C8芯片,使用VERILOG语言编程仿真。该设计的调制解调器体积较小,耗能低,集成密度高,抗干扰能力强。     

基于FPGA的Intel 8254的设计与实现

针对Intel 8254在某些工程应用中的局限性,提出利用FPGA和VHDL语言实现8254的设计思想;按照8254的内部逻辑结构及功能,将VHDL设计分为4个独立的功能模块,并分别介绍了各个功能模块的主要设计要点;以Altera公司的FPGA(Cyclone)系列产品为载体,在QuartusⅡ开发环境下,进行仿真和下载验证,效果良好;结果表明,利用FPGA设计并实现8254芯片功能具有可行性,同时,采用FPGA设计方法可以根据实际应用需求对芯片功能进行取舍和优化,因而具有更好的灵活性。     

基于FPGA的交通灯控制系统的设计与实现

该文基于FPGA芯片EP4CE6E22C8设计了一款交通灯控制系统.首先从设计要求出发,将交通灯控制系统分成多个底层电路模块并用Verilog HDL语言对其进行设计和仿真,然后调用已设计好的各底层电路采用原理图方式进行顶层电路设计,最后将设计好的顶层电路进行管脚锁定并下载到FPGA芯片中进行硬件验证.仿真和硬件验证结...     

基于FPGA的通用开关电源控制器硬件模拟开发平台的设计与实现

设计了一套基于FPGA的通用离线开关电源硬件模拟开发平台,并对此硬件开发平台的硬件组成及工作原理进行了分析。利用此硬件开发平台对开关电源控制器进行硬件模拟,可以弥补控制芯片设计过程中软件仿真的不足,大大缩短控制芯片开发周期。     

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.     

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.     

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     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.