基于MLVDS和USB3.0的多节点数据传输系统设计与实现

针对数据采集系统中上位机无法与多节点采集设备高速通信的问题,设计了一种基于MLVDS接口和USB3. 0接口的数据传输系统。该传输系统采用CYUSB3014接口芯片实现计算机与FPGA的高速数据传输,采用ADN4693E接口芯片完成多节点数据传输,以FPGA作为核心控制器,并基于MLVDS自定义协议解析多节点通信逻辑,实现MLVDS接口与USB3.0接口之间的数据交互。测试结果表明,该系统数据转换结果准确、可靠,实现了上位机与多节点数据采集设备间的高速通信。     

基于光纤传输的多路高速数据采集系统

介绍了8路高速数据采集传输系统的设计与实现。使用时分复用的数据传输方式将8通道数据通过3个光纤通道传输给处理设备,解决了多路高速数据传输的问题。采用FPGA作为主控芯片,TLK1501作为串/并转换和8 B/10 B编码芯片。A/D采样频率为20 MHz,整个系统的数据传输速率达到了1 920 Mb/s。通过使用Verilog语言编程,实现了数据的采集以及传输。该方案具有可行性好、方法简单、成本低的优点。     

基于FPGA的PXI多路高速数据传输系统设计

针对目前自动测试系统中要求测试信号传输距离远、传输速度快、传输信号种类多、系统工作环境恶劣等问题,设计并实现了基于PXI总线的多路高速数据传输卡。采用FPGA实现了自主化的UART和PXI接口模块,与专用接口芯片相比,具有传输速度快、灵活高效的特点,增强了系统的集成度、稳定性和可靠性。     

基于AT89S51和nRF905的无线温度检测系统设计

针对传统温度检测系统中有线数据传输方式存在布线复杂、成本高等问题,设计了一种基于AT89S51单片机、数字温度传感器DS18B20和无线射频收发芯片nRF905的无线温度检测系统。该系统利用DS18B20测量现场温度,通过nRF905完成无线数据传输,利用AT89S51实现对温度数据的处理以及与计算机的通信,从而实现了多点温度数据采集和远距离无线传输。     

基于MCU和nRF905的低功耗远距离无线传输系统

介绍一种基于MCU和nRF905的低功耗远距离无线传输系统,描述了系统设计软硬件的实现方法和多点传输数据的通信协议。系统主控芯片采用通用的低功耗MCU芯片MSP430,射频芯片采用具有多信道的单片收发芯片nRF905。同时提出了跳频机制保证数据传输的可靠性,增加了系统的鲁棒性。     

基于NiosII和3G无线网络的远程数据传输系统

为了实现有线网络难以覆盖的远程数据传输,设计了基于NiosII系统的远程数据传输系统。系统中使用FPGA芯片的IP核构建NiosII控制系统和与3G模块通信的UART接口,同时设计了数据传输控制程序和通信协议,实现了通过3G无线网络的数据远程传输。针对电力系统的远程数据采集进行了测试,系统功能完善,运行可靠。     

基于FMQL的千兆以太网传输系统设计

针对国产化有线单元测试台数据传输速率低的问题,提出采用国产FMQL芯片作为控制芯片设计千兆以太网传输系统.以太网数据传输是目前广泛应用的一种传输手段,集成ARM与FPGA的国产FMQL芯片移植了LwIP协议栈,大大简化了设计复杂度.系统设计的关键技术是实现PS端与PL端的数据交互,通过调用FPGA中的AXI-DMA I...     

主DMA模式下PCI总线数据传输的DSP实现

研究了基于PCI总线的DMA数据传输系统,着重描述了利用TMS320DM642DSP芯片实现PCI总线DMA数据传输的方法。以DM642作为PCI主设备控制并启动DMA数据传输,给出了主DMA模式下数据传输系统的实现结构及工作流程,并配合内存映射、双缓冲等方法,取得了良好的数据传输性能。     

基于CPCI总线的高速数据传输系统的设计

针对通用数据传输系统无法满足高指标通信工程对数据高速稳定传输的要求的现状,介绍了一种基于CPCI总线的高速光纤数据传输系统,提出在硬件上用单片FPGA芯片代替分立元件实现接口设计、在软件上提出用驱动程序代替应用程序完成数据分割存取的思想,着重阐述系统的结构框图、工作原理和软硬件实现,并给出选用芯片的型号;实验结果表明,基于该思想的设计能够有效地提高系统的数据传输速率;该CPCI光纤传输系统能够高效、快速、稳定地工作。     

基于arms3c44b0x处理器的bootloader设计和实现

在不同安全域之间传输文件，只能是低保密级别安全域的文件向高保密级别安全域传输。介绍了基于USB2.0总线的单向数据传输系统的实现原理及技术,系统地阐述了如何采用USB2.0集成芯片CY7C68013与光耦、双口RAM结合来实现计算机单向数据传输的方案, 通过实验验证该系统实现了单向、可靠、快速的数据传输。     

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。     

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。