双通道编码高速存储系统设计

航天事业对存储系统的存储速度及保密性的要求在不断提高,针对这些要求提出了双通道编码高速存储系统的设计;设计了一种以RS-422和LVDS为通信手段,双端口RAM为缓存介质,双片选交替双平面混编存储为技术,混合编码存储为特点,K9WBG08U1M芯片为存储核心的高速、大容量的存储系统;双通道编码高速存储系统解决了双路数据存储速率低的问题;最后,对系统采集的数据进行科学分析及图像还原,验证了高速存储系统的可靠性.     

基于PCI和LVDS的高速数据存储系统的设计

针对某系统图像数据量大、传输速率快的特点,提出了采用PCI总线协议完成PC与高速数据存储系统之间的通信,利用LVDS总线协议传输数据并进行混合编帧的解决方案。为提高数据存储速率,使用Flash交叉双平面页编程技术,将写入速度提高到30 MB/s,有效地满足了图像高速存储的要求。针对数据的码率匹配,通过构建片内FIFO缓存来实现。测试结果表明,所设计的数据存储系统能够稳定地接收并存储图像数据,而且具有很高的可靠性。     

基于LVDS和68013A的数据控制传输系统设计

为实现某弹载存储系统数据的远距离、高速传输,介绍了一种以FPGA为控制核心,LVDS芯片组和68013A作为受控对象的数据控制传输系统;着重讨论了LVDS硬件接口电路设计和68013A的固件设计;某弹载系统实际应用表明,该系统运行稳定可靠,满足任务要求。     

基于FAS466的高速CCD相机数字视频实时存储系统设计

为了满足高帧频、大面阵CCD相机数字视频实时存储要求,设计出基于SCSI协议处理器(FAS466),脱离计算机平台的图像数据直接存储系统。该系统采用FPGA芯片编程实现DMA控制功能,从而协调SCSI协议处理器实现数据的传输。此外,系统采用双硬盘交替存储方案以提高存储速度,实现存储流量达70MBps。本文介绍了该设备的系统结构和软硬件设计方法。     

基于双存储机制的实时图像采集存储系统

针对实时图像采集和存储的要求和困难,设计了一个基于CMOS图像传感器和双存储机制的实时图像采集存储系统,采用OV7640CMOS图像传感器作为成像器件,在S3C44B0X处理器控制下,通过OV7640的接口芯片OV511的USB接口将采集到的标准格式图像数据传输到SDRAM中存储并定时刷新,同时设计一个事件触发按钮,根据操作需要,控制图像数据转存到FALSH中,以供事后记录和审查之用。实验表明该系统能够实现实时图像的高质量采集和存储。     

基于LVDS的固态存储器与地面综合测试台通信系统设计

针对遥测系统远程数据传输过程中出现的由于干扰引起的误操作以及数据紊乱问题,提出了一种基于LVDS的具有高可靠性的通信系统解决方案;系统以FPGA为控制核心,采用LVDS高速数据传输技术,实现飞行器遥测数据存储系统与地面设备的通信;为保证数据链路与命令控制链路的准确性和可靠性,设计了一套完整的通信协议;经大量试验表明,该通信系统性能稳定、数据及命令传输可靠,现已应用于某航天遥测数据通信系统.     

基于FPGA的视频图像采集系统的设计与实现

针对图象采集对实时性和可靠性的要求,提出并实现了一种以FPGA为控制核心的视频图像采集、存储系统。采用Altera公司的EP1C3T144C8FPGA芯片,完成了对视频解码芯片ADV7180的I2C总线配置,接着从视频流数据中提取有效图像信息并以Brust方式存储在SDRAM中。经过相关的测试,系统工作稳定,实时性和可靠性较好,充分发挥了FPGA控制灵活、速度快并且容易扩展的优点。     

基于Camera Link的串行图像采集系统设计

在设计测试系统时,要求高速、可靠地传输大量的图像信息至上位机进行存储和处理。采用LVDS或HOTLink信号格式,将远程CCD采集的图像信号进行串行传输,由 FPGA乒乓操作进行缓存,通过Camera Link接口,将图像数据以串行方式高速传输至图像采集板卡PXI-1428。实验中以150fps的速度连续采集128×130大小的串行LVDS图像或500fps的HOTLink图像,最大传输速率达到320Mbps。实验结果表明,Camera Link是实现高速串行图像传输的便捷途径。     

基于FPGA的图像采集与存储系统设计

设计了一种针对具有大数据量特点图像数据采集、存储及长线回读的测控系统。在控制信号的作用下,此测控系统将CMOS传感器采集的大容量数据存储到Flash芯片中。存储完成后,通过LVDS总线,将Flash芯片中存储的数据回传到上位机进行存盘并显示。实验证明,此系统稳定性高,在工业控制领域具有借鉴意义。     

低成本网络数据传输存储系统的FPGA实现

三维LED显示阵列显示一帧立体图像需要很大的图像数据,针对它的数据可靠传输的问题,提出了一种一对多远程网络数据传输存储系统的具体连接和实现方案.该方案应用了现场可编程门阵列(FPGA)以及Verilog HDL编程技术,结合了Intel 28FJ3A系列Flash芯片和DM9000A以太网控制芯片,实现了立体图像的同步显示和储存,网络传输速度可以达到100Mbps,具有低成本、低功耗、高速率等特点.     

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.     

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。