机载偏振成像系统的数据采集

介绍了机载偏振成像系统中的3路CCD相机同步控制PCI图像采集卡的工作原理，详细阐述了图像数据采集系统的硬件结构设计和图像采集卡的驱动编程方法，介绍了为实现高速图像数据传输需求所采用的DMA、多线程和双缓冲技术。本系统实现了Windows2000操作系统下同步控制3路CCD相机，以20MB／s数据率完成高速数据的传输与存储。     

一种多PCI卡组成的高速同步图像获取系统

用机载仪器获取地物的偏振信息需要同步得到三个偏振方向的图像数据。论文介绍了机载偏振CCD相机中数据采集与记录系统的结构,阐述了基于PCI总线的多路、高速数据采集卡的实现方案和工作原理,给出了用WinDriver编写windows2000环境下PCI数据采集卡驱动程序的实例方法与步骤。     

基于PCI总线的CCD数字相机实时采集系统的设计与实现

针对CCD技术应用中图像数据量大和图像实时处理的需求,提出了一种基于PCI总线的CCD数字相机实时采集系统的设计方法.系统采用高速PCI接口芯片,结合FIFO和CPLD逻辑电路,实现了CCD相机与PCI总线间的高速数据实时传输,很好地解决了计算机与外部设备进行高速、大数据量数据传输的难题.     

CCD数字相机的电源系统设计

分析了CCD相机外部单路供电,并为实现多路DC/DC转换功能,提出了一种开关型稳压电源与线性稳压电源相结合的系统设计方案。分析了具有BOOST/BUCK功能的开关电源和线性稳压电源的工作特性,并结合CCD相机的整体设计要求,实现了相机电源的功耗低、发热量小、EMI干扰轻的设计目标,从而提升了CCD相机的整体性能。     

立靶测试系统中高精度角度测量研究

为弥补传统光电立靶中相机仰角角度值不能实时显示的不足,介绍了一种新型高精度立靶密集度测试系统角度测量电路的设计;该角度测量电路主要由高精度角度传感器、51单片机、多位LED显示部分构成,可以完成线阵CCD相机仰角的实时测量和显示,精度可达0.0027°,并且可以和上位机进行多路串口通信,方便对多台线阵CCD相机仰角进行监控,避免在测量过程中因相机仰角的变化而带来的测量误差.     

超分辨率图象重构技术的仿真实验研究

CCD相机在对空间频率较丰富的景物进行成象时,由于CCD象元尺寸的限制,图象分辨率低,混频现象有时很严重,红外相机尤其如此,超分辨率图象重构技术利用多帧重复拍照图象的冗余信息,重构出超分辨率图象,消除和降低混频效应,本文对图象微位移和微旋转角的精确估算算法,相机模型,超分辨率较象的重构算法等关键技术进行研究,设计了序列了集共轭梯度最优化算法,并提供了分辨率提高5倍的算法和研究成果,该项技术对于星载,机载图象融合（特别是红外凝视成象系统获取的图象）是十分有意义的,它将有可能将航天或航空图象的分辨率提高2－5倍左右。     

基于FPGA的CCD相机的图像采集

介绍在特定环境下CCD相机图像数据的采集背景下的一种基于FPGA的高速图像数据采集板卡设计方法,详细讨论了其系统结构和核心部分的内部功能模块,并给出了其核心：PCI IPcore的具体仿真结果。同时探讨了此板卡和外部的接口实现问题。     

基于FPGA的CCD相机的图像采集

介绍在特定环境下CCD相机图像数据的采集背景下的一种基于FPGA的高速图像数据采集板卡设计方法,详细讨论了其系统结构和核心部分的内部功能模块,并给出了其核心:PCI IPcore的具体仿真结果。同时探讨了此板卡和外部的接口实现问题。     

工作站集群系统高速互联技术的设计与实现

高速互联技术是构造工作站集群的关键技术之一，该文首先概述了实现高速互联的3类数据传输方式，然后提出了多路串行链路技术以实现高带宽、低延迟、灵活可扩展的互联网络,介绍了其中关键的多路数据同步逻辑，并采用FPGA和惠普GLINK串闻转换芯片组实现了一块基于PCI总线的互联通信接口卡，验证了多路串行链路技术的可行性。     

CCD相机自动测试技术研究

建立了一个CCD相机自动测试模型,对CCD相机根据应用需求进行自动测试。根据应用环境分析了CCD相机的6个主要的影响因子,并分类为可用影响因子和可靠性影响因子;针对不同影响因子的特点,提出了具体的测试方法和算法,并建立了影响因子评价函数;根据因子评价函数,通过加权的方式建立了CCD相机的综合评价函数;模型还给出了CCD相机自动测试框架。实验结果表明,CCD相机自动测试技术能够有效减少测试时间,提高测试效率,降低测试复杂度,对CCD相机的测评更加全面和可信。     

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.