基于SATA3.O的存储系统优化设计

针对遥测试验中,获取的高分辨率、高帧频的大容量图像数据的实时存储以及传输稳定性问题,对存储系统进行了优化设计.该系统以Kintex 7系列FPGA为控制核心,将接收到的大容量图像通过SATA3.0传输总线,存储到固态硬盘中,并且优化了链路状态机,通过实时标志监测解决了传输中断的问题.存储完成后,通过千兆以太网将固态硬盘...     

基于SATA3.0的存储系统优化设计

针对遥测试验中,获取的高分辨率、高帧频的大容量图像数据的实时存储以及传输稳定性问题,对存储系统进行了优化设计。该系统以Kintex 7系列FPGA为控制核心,将接收到的大容量图像通过SATA3.0传输总线,存储到固态硬盘中,并且优化了链路状态机,通过实时标志监测解决了传输中断的问题。存储完成后,通过千兆以太网将固态硬盘中的数据读取到上位机进行回放和分析。在常温以及-40℃和+60℃条件下完成大量的读写测试,结果表明,优化后的存储系统可以完成高速率、长时间的稳定存储,在大容量存储方面具有很好的参考价值。     

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。     

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WAN的网络软RAID系统性能的研究

当前绝大多数网络存储系统都是通过高速网络进行连接的。论文设计并构建了基于低速WAN的网络软RAID系统(NSRAID),研究了广域网环境下影响网络存储系统性能的主要因素。同时,以网络负载的角度分析了远程存储节点数、网络存储协议和数据布局方式影响系统性能的内在原因。在此基础上,针对广域网不同的网络性能提出了提高网络软RAID系统性能的方法。     

遥感图像海量存储系统的设计与分析

海量数据存储系统是遥感图像信息系统的关键组成部分之一。存储系统的研究包括硬件体系结构和关于存储调度的软件算法两个重要的方面，其中系统的设计和评价是其研究的核心内容。本在有关研究的基础上，主要从系统体系结构以及抽象的系统描述角度，研究和探讨了海量存储系统设计与分析中的基本技术问题。指出了视频数据存储系统和图像数据存储系统之间在要求上的差异，并提出了海量数据存储系统的抽象民相应的评价指标，紧后给出了一个适合海量图像数据存储的实际系统设计方案。     

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。     

基于闪存的图像存储系统设计

针对硬盘存储图像速度慢、可靠性差的弊端,分析了以Flash作为存储介质的可行性,提出了一种基于闪存Flash的存储系统设计方案.利用并行与流水线技术相结合,有效提高了存储容量和操作速度.整个存储系统利用FPGA控制读、写、擦除以及坏块识别的逻辑时序,利用单片机管理无效块,建立有效块表.实现了对高速大容量图像数据的存储操作,满足了实际应用中高速相机的需求.     

基于SATA的嵌入式直接存储系统

研究嵌入式高速存储系统的应用问题,分析传统数据存储系统存在的不足,提出一种基于SATA的嵌入式直接存储系统设计方法。该方法参照完整实现SATA物理层和链路层协议,根据嵌入式存储需求组合SATA传输层和应用层协议建立DMA控制模块,在现场可编程门阵列中构建符合SATA标准的存储通道。SATA存储通道实现数据到SATA存储设备的直接存储,通过扩展SATA存储通道实现存储系统带宽及容量的扩展。实验结果表明,该方法能解决带宽瓶颈和通用性问题,达到良好的存储效果。     

基于FC-AE-ASM的图像采集系统的设计实现

针对航空电子系统对数据密集型任务通信的高传输带宽需求,依据光纤通道具有高速率、可扩展及可靠性高等优点,设计一种基于FC-AE-ASM协议的通信系统结构,提出帧协议层的实现方法。基于该通信系统完成图像采集系统的设计,实现图像数据的实时高速传输和存储。经验证,FC-AE网络总线传输速率高且可靠性好,适合应用于航空电子系统。     

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。