基于CH378的便携式高速数据采集系统设计与实现

针对数据采集系统在速度、容量和体积方面的需求,文中提出了一种基于FPGA的便携式高速数据采集系统方案,采用可充电锂电池作为供电电源,采用FPGA控制读写大容量Flash数据作为高速数据缓冲,控制USB接口芯片CH378完成对U盘的读写操作,实现大容量数据的可靠和便携存储;详细介绍了该测试系统的设计背景、硬件电路的设计依据、固件程序的设计思想和测试系统的具体实现;实验结果表明,该系统具有成本低、通用性强、可靠性高、便携式操作等优点,能够实现数据的高速采集,海量存储,实现了脱离计算机直接存储数据至U盘的功能。     

基于CH378嵌入式存储系统设计

随着军事工业飞速发展,高速数据存储设备成为导弹测试领域不可或缺的一部分。通过对导弹测试领域中现有数据存储设备研究发现当今存储系统存在传输速度低、存储容量小、可靠性差、数据易丢失、严重依赖PC机等缺点,首次提出以U盘作为存储介质用于某型号导弹参数测试领域,以最新的USB串口芯片CH378来设计读写U盘,并独特运用FPGA读写大容量的FLASH构成存储系统的数据缓存部分这一设计理念,最终以STM32F103VE单片机控制CH378将缓存数据写入U盘的设计方案;文中详细介绍了基于CH378的嵌入式存储系统软硬件设计,最后通过软件测试U盘存储速度并用信号发生器模拟传感器信号输出,对比U盘和FLASH中数据并对数据解码分析,验证系统达到高速可靠存储等设计要求。     

基于单片机的嵌入式USB主机系统的实现

在无操作系统的单片机系统中实现USB主机系统功能.对U盘进行文件的读写.并在U盘上实现FAT格式文件系统.使U盘成为单片机应用系统的存储设备.这极大的方便了单片机在数据采集,存储以及传输方面的应用.最后,实现了脱离PC机的对U盘操作的功能,数据能够脱离PC机在U盘之间方便简洁的交换.     

基于USB-Host的大容量数据采集系统的设计

利用USB主控制器控制U盘作为数据采集系统的移动存储器。该设计基于USB主／从控制芯片CH375S，遵守大容量存储设备类规范中的Bulk—Only和UFI子规范，支持FAT16文件系统，实现了数据采集系统中可用U盘进行数据存储，方便与计算机交互；配合液晶和外扩键盘，可以完全抛开PC，实现采集数据的实时显示和指定存储区域内数据的查看。     

基于CH375的单片机U盘控制器的设计与实现

介绍了一种以USB接口芯片CH375和单片机为核心,U盘为存储介质的数据存储方案,给出了系统硬件实现和单片机读写U盘的应用程序。实验结果表明,该方案具有成本低、通用性强、可靠性高等特点,可方便地集成到各种测控系统中。     

基于USB2.0总线的NAND Flash检测及控制方法

在高速大容量存储装置设计中多采用NAND Flash存储器,针对目前采用串口检测坏块、实现数据读写的方法存在检测速度慢、等待时间长等缺点,提出了基于USB2.0总线的NAND Flash检测与控制方法。利用FPGA逻辑控制功能和高速USB接口芯片设计通信和控制电路,并通过上位机软件实现对Flash的命令、操作控制,由用户通过PC应用程序完成对NAND Flash的读写、擦除检测及坏块标定。经实验应用验证,该方法检测、读写速度快,使用灵活,能准确、有效实现数据的快速读写、擦除及坏块标定,可广泛应用于存储测试装置的设计研制中。     

基于NUC972灭菌设备电子存储器的设计

灭菌设备根据法规要求需要对灭菌过程数据进行记录并存档,且能够被追溯。本文设计一种能够接收PLC控制器发出的数据,将数据储存的同时转发给打印机的电子存储器。存储器使用ARM926EJ内核的MCU,执行速度快,内存容量大,接收的数据存储到电路板级的大容量NAND FLASH中,确保数据的安全可靠。储存器具有带安全防护RS232/RS485;具有高速的SD卡和U盘接口,并且U盘的识别率高和稳定性好;运行LINUX操作系统,可以输出不易篡改的PDF文档。该存储器不仅执行速度快,功能强大,而且稳定性好,成本低。特别适用于灭菌设备的过程数据监测与存储。     

基于MCS－51的PLC数据存储系统

给出了一种基于MCS－51单片机的PLC数据存储系统的设计方案,采用自由端口模式完成PLC控制器与单片机的数据通信,利用CH376接口芯片实现单片机对U盘等移动设备的数据读写,从而将PLC控制器采集到的数据存储在U盘、移动硬盘等存储设备里,便于数据存储和使用。     

在嵌入式系统中实现USB主机功能

本文给出了一种在嵌入式系统中实现USB主机功能的方案,此方案采用爱普生公司72V系列的USB芯片作为控制器,配合相应的软件系统,可以实现U盘和移动硬盘等大容量存储设备上数据的读写。     

基于S3C2440和AD9248的高速采集系统的设计

设计了一个利用高速A/D、FIFO以及ARM9实现的高速数据采集系统.通过ARM9控制高速A/D转换和FIFO的读写,并采用大容量的板载数据存储器,可以实现较长时间的连续采集.设计了网络接口和USB接口实现数据的保存和传输,并设计了GPS授时模块接口以实现多个站点的同时数据采集.     

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.