医用超声内窥镜高速成像系统的USB2.0接口设计

提出了一种基于USB2．0的DMA方式下实现医用超声内窥镜高速图像采集的新方法。该方法以CPLD（复杂可编程逻辑器件）作为数据传输的控制核心,并采用了外部高速缓存模块以实现数据传输的完整性,结构简单,灵活性强,方便易行,完全满足医用超声内窥镜系统实时显示图像的要求。该设计可被广泛的应用于要求高精度高速实时数据采集的场合。     

片间高速图像传输系统的设计与实现

针对图像采集与处理系统研发中的现场可编程门阵列(FPGA)之间的高速图像数据传输问题,设计了一种全双工、高吞吐率、高稳定性和高抗干扰能力的高速图像数据传输方案。设计的片间高速图像传输系统提供了通用的图像传输接口,可兼容不同的数据位宽和用户时钟频率。高速图像传输模块分为协议层和物理层。协议层包括跨时钟域电路和CXP图像传输协议编译码电路,完成跨时钟域和图像数据流编译码处理;物理层基于Aurora 8B/10B core,完成数据流的串并转换以及多通道绑定等处理,并采用GTH收发器实现高速串行数据的收发。仿真测试表明,图像数据传输正确,图像数据流同步时钟最高可达250 MHz,传输位宽达128 bit,最高吞吐率可达32 Gbit/s,平均吞吐率为20 Gbit/s,并且还有很大的提升潜力。该高速图像传输系统能够实现高吞吐率、高抗干扰、低错误率的图像数据传输,有助于各种不同视觉测量系统和图像处理系统的开发,具有广泛的应用价值。     

基于DMA方式的医用超声内窥镜高速图像采集系统的USB2.0接口设计

提出了一种基于USB2.0的DMA方式下实现医用超声内窥镜高速图像采集的新方法。该方法以CPLD（复杂可编程逻辑器件）作为数据传输的控制核心，并采用了外部高速缓存模块以实现数据传输的完整性，结构简单，灵活性强，方便易行，完全满足医用超声内窥镜系统实时显示图像的要求。该设计可被广泛的应用于要求高精度高速实时数据采集的场合。     

基于PCI Express总线的高帧频CMOS相机图像采集系统设计

基于PCI Express总线设计了一种高帧频CMOS相机图像采集系统。选用帧频250帧/s的LUPA-300作为高帧频图像传感器,通过FPGA实现对图像传感器的参数配置与图像数据处理,采用PCI Express总线作为图像数据传输总线,大大提高了传输速度。实验结果表明该系统结构简单、成像清晰稳定、拍摄速度快,可应用于高速目标的拍摄。     

一种模拟分析高速图像处理模块的方案与实现

介绍了一种通过硬件高速传输图像灰度数据的电路设计方案,为模拟卫星上图像数据传输,分析卫星用高速图像处理模块的性能提供了一种有效的手段,并介绍了利用微型机打印口与下位机进行数据传输的方法。其工作过程为：上位机将测试用的数据通过打印机口传送到作为数据源的暂存板Ⅰ上,为了模拟高速的数据源,采用了硬件译码与查表的方法,启动暂存板Ⅰ上的开关后,将图像数据高速传送到图像处理模块上。速度可达100Mbyte,经处理（如压缩等）后的数据立即会被传送到暂存板Ⅱ,然后再通过打印机口（并行口）将这些数据接收到微机内。     

Windows下PCI总线图像采集卡的编程

PCI总线是Intel公司为了满足外设与主存之间、外设之间高速数据传输设计的高速总线。本文中我们采用PCI总线来设计图像采集卡,以完成图像数据的传递,从而可以解决图像数据传输量大的问题,减少对总线占用的时间。 一、系统硬件介绍 逻辑框图如图1。     

基于PCI总线的高速图像数据通道的研究

计算机直接制版系统采用多通道高频激光进行高解析度图像的输出,常用的计算机接口不能满足其大数据量高速数据传输的要求.本文研制了一种基于PCI总线的高速图像数据通道,采用双数据总线、双缓冲及硬件数据排序,由PCI总线接口、数据缓冲、数据排序和LVDS驱动和接收等模块组成,系统简单、成本低,有效地减小了CPU对图像数据的运算时间及其对传输过程的操作时间,提高了图像数据传输的速度和实时性;应用实验表明该图像数据通道传输速度快,数据传输稳定可靠,能够满足计算机直接制版系统的应用要求.     

钞票识别板块

东芝推出数据传输速率更快的接触式图像传感器模块支持中国市场的高速、高准确度钞票识别应用东芝公司(Toshiba Corporation)今天宣布推出一种数据传输速率更快的接触式图像传感器模块"CIPS183BS210",可应用于钞票识别系统。该产品计     

基于TLK2711的高速图像数据串行传输系统

本文设计了一种适用于高速、多通道CCD图像数据的串行传榆系统,以TLK2711高速串行收发器为传输核心,将高速差分传榆技术应用于系统的图像数据传输部分.详细介绍了该收发器的工作原理和功能组成.该设计已成功应用在某八通道TDICCD成像系统中,实现了图像数据的实时、稳定、高速传输.     

基于硬件协议栈W5100的图像采集传输系统

提出了一种基于硬件协议栈芯片W5100的远程图像采集传输系统。该系统使用STM32微控制器实现图像数据的采集与图像预处理,再利用W5100完备的以太网协议与灵活高速的传输能力,完成向远程终端的图像数据传输。     

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。     

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.