多通道心电测试仪的USB2.0计算机接口设计

针对多通道心电测试仪对PC机接口提出的高数据传输带宽的要求,采用USB2.0规范推出的480Mbps的高速数据传输模式,介绍了一种以数字信号处理器ADSP2188为外部微控制器,以EZ-SX2系列USB接口芯片CY7C68001为接口控制芯片的USB2.0数据传输接口设计方法,并对软硬件设计上的关键技术作了详细的论述;经过测试,该接口的数据传输速率很好的满足了测试仪对传输带宽提出的要求,获得了实际运用.     

一根无形的数据“软”线

正Android手机与电脑、手机与手机之间传输数据,以往多用USB数据线、移动网络等进行。有了"软件数据线"这款APP,数据传输无需数据线、无需移动网络也可以进行了。手机之间无缝高速传文件首先是手机与手机之间的数据传输。软件数据线"同步手机"功能实现与50米内的其他Android设备同步文件、文件夹或Android应用。数据在本地传输,不会影响移动网络流量(零流量消耗)。使用方便,传输快速安全(达到54Mb/s的传输速度)打开"同步手     

基于USB的箭载数字量变换器测试仪设计

为配合箭上某型号数字量变换器进行全面的性能测试,通过对数字量变换器性能指标以及各状态信号的分析,提出了基于USB接口的高速数字量变换器测试仪的设计方案;详细说明了系统各功能模块的实现方法,并对系统进行了实际的分析和测试;与以往测试仪器性能相比,该设计从硬件、软件及其工作模式方面都做了一些优化,明显提高了测试的精度;系统整体采用模块化设计方法,完成幅值8-10V的计算机字信号以及幅值28V的指令信号的传输,具有很强的通用性和可扩展性;在实际应用中,该测试仪设计可行,能全面检测数字量变换器的性能。     

傻博士

手机连接电脑频繁断开Q:我用的是一部Android系统的智能手机,使用数据线连接到电脑后,会出现时断时接的现象,同时还会不停地听到系统连接USB设备和断开的声音。请问这该怎么办?A:请先检查你的手机数据线是否损坏导致接触不良,可换一条同样规格的数据线试试。其次考虑更换电脑USB接口,尽量不要使用前置、带USB延长线或USBHUB设备上的接口,最好使用主板上的接口。如果是笔记本电脑,建议连     

基于单片机的USB接口的设计

提出了一种基于单片机的智能仪表扩展USB接口的方法。介绍了USB接口芯片SL811HS的结构和性能以及USB接口的硬件电路图，详细分析了USB接口驱动程序的设计方法及FAT16文件系统的结构。利用SCSI传输命令集，通过BULK-IN和BULK-OUT端点实现了主机与U盘设备之间的数据通信。实验和应用结果表明，该方案具有控制方便、传输速度快、存储数据稳定可靠等优点。     

基于USB3.0的高速读数盒设计

针对测试系统中USB2.O接口已不能满足当代测试速度需求,提出一种基于USB3.O和FPGA的高速读数的解决方案;该方案以FPGA为核心控制器,EZ-USB FX3被配置成Slave Fifo从模式;通过对DMA通道和GPIFⅡ接口优化设计以实现指令的下传和数据的高速上传;经实际传输测试,该读数盒能在传输数率高达228 MB/s时依然能保持正确无误的高速传输。     

基于USB3.0主模式高速接口卡设计

针对现行USB2.0接口已不能满足现代大容量数据高速度传输需求,提出一种基于USB3.0和FPGA的高速传输的解决方案;该方案通过配置可编程接口把EZ-USB FX3设置成master主模式,优化DMA数据传输通道,实现了电脑与接口卡之间数据高速传输;文章详细地介绍如何提高传输速度的方法,经实际传输测试,该接口卡能在传输速率高达350 Mbyte/s依然能保持正确无误的高速传输.     

基于USB接口的远程安卓手机心电测量系统的设计

为了方便测量心电信号,设计了一种便携的基于USB接口的远程安卓手机心电测量系统;系统由检测模块、USB接口模块、安卓手机端软件组成;检测模块检测心电信号,并通过USB接口把信号发送到手机上,手机上的软件对接收到的数据滤波处理,还原出心电波形图,并计算心率;在心率异常时,软件可以自动发送波形截图到指定邮箱和手机;经测试,系统测量精度较高,工作稳定。     

高速数据采集系统的USB接口设计

针对工程领域对数据采集的多类别数据、高速采集和传输、实时性的要求,设计基于USB接口的高速数据采集系统,并有FPGA+DSP搭配进行采集系统的逻辑控制、接口控制和信号处理,另有一块AD转换板进行模数转换;重点阐述USB接口设计的原理和实现,包括USB固件程序设计、驱动程序设计和USB应用程序设计;经过传输256*256的灰度图像、测试USB通道数据传输速度和使用采集板采集方波信号的测试,证明系统能够实现数据采集的任务,有很快的数据传输速度。     

基于Android 平台的USB 数据采集系统

介绍了一种新型的Android平台的数据采集系统,并实现了与LPC2142之间的USB通信设计。描述了Android USB应用程序的完整开发过程,并在此基础上实现了Android手机和AMR平台之间的USB通信,是基于开源移动终端Android的最新应用程序的开发。该设计前端采用LPC2142的A\D接口采集数据并通过USB数据线发送到后端设备。后端采用Android3.1平板电脑的USB通信接口接收数据,并在Android平板设备上显示波形。该设计实用,新颖,具有广阔的应用前景。     

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。