CG-02风洞螺旋桨动力性能测试数据采集系统

针对某便携式巡飞弹的螺旋桨动力性能测试的风洞试验数据采集需求,基于CG-02风洞进行了数据采集系统的设计。数据采集系统采用分布式结构,硬件基于PXI总线和工业以太网搭建。软件采用模块化设计思想,基于LabVIEW图形化编程语言对不同功能模块进行开发,实现了气动力信号和转速信号的同步采集。对试验中的信号抗干扰技术和转速测量技术进行了研究,提出了软、硬件滤波相结合的信号抗干扰方法和基于K-means聚类的螺旋桨转速测量方法。使用本数据采集系统开展测试试验,结果表明系统满足试验要求。     

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FPGA的便携式导弹快速测试方法研究

针对当前导弹测试方法繁琐复杂、测试效率较低等问题,同时结合导弹快速发射等实际需求。论文提出了一种基于FPGA的便携式测试方法研究。该方法以Cyclon IV FPGA芯片作为核心数据综合处理单元,核心处理单元采用双核处理器架构,搭载对应的通信板、模拟量以及数字量板卡,分别完成对应的测试指令发送和对应的数据采集,数据处理软件采用采用uc/OS II操作系统完成任务整个系统任务调度。同时采用便携式智能数据终端来实施查看并自主分析测试数据。实验表明该方法,可降低测试设备体积、降低测试方法复杂度同时提高测试效率,从而实现实现快速发射。     

基于USB3200的便携式高速数据采集仪

便携式是数字化仪器的发展方向之一。介绍一种基于USB3200的便携式高速数据采集仪的设计实例,数据采集仪配置AD7862芯片,可以满足多种生产现场信号的高速数据采集工作。可编程逻辑CPLD的采用,使得系统具有较强的可扩展性。详细地介绍了系统的硬件设计和软件设计,并在仿真的基础上通过对方波信号的试验分析,验证了系统设计的可行性和正确性。     

一种新型便携式γ谱数据采集系统设计与实现

介绍了一种新型的用于野外地面γ射线能谱测量的便携式数据采集系统的设计，详细阐述了设计思路，提出了可行性方案，给出了重要功能模块及采取的关键技术，并重点针对便携式γ谱数据采集系统的低功耗，实时性和高性能设计进行了研究，最后给出了其主要技术指标及一次实测^137Cs标准源的γ谱线，结果表明该系统功能完善、工作功耗低、性能稳定可靠。     

基于Linux的便携式扭矩扳手检定仪的设计

针对机械式扭矩扳手检定仪体积大、操作复杂等缺点,文章设计了基于Linux的便携式扭矩扳手检定仪。检定仪以ARM11处理器为硬件平台,外围搭建信号调理电路、电源电路等模块;软件上对数据采集程序进行设计,同时以嵌入式Linux为开发平台,设计Qt界面,对数据进行录入查询。该检定仪精度高,性能稳定,操作简单,便于携带,可用于各类扭矩扳手的管理和定期检验,具有很好的市场前景。     

一种便携式导弹电液伺服机构动态测试系统设计

针对现有导弹测试设备存在的装备体积大、结构复杂、维修困难、测试时间长等突出问题,提出一种基于PCI总线和虚拟仪器技术的便携式测试系统设计方案。在分析电液伺服机构工作原理基础上,推导建立其数学模型;根据伺服机构动态测试需求,完成测试系统硬件设计和选型,按照“模块化、标准化、小型化”的原则,采用工控机控制PCI-1742U多功能数据采集卡实现测试过程中的信号激励和采集;基于Visual Studio软件开发平台,编制动态测试软件,实现测试过程中激励信号参数设置、数据采集、信号处理,以及数据管理等功能;最后通过基于正弦相关分析法和基于chirp信号的测试方法的仿真测试实验分析了采样频率对测试结果的影响。     

低功耗数据采集系统的USB接口设计

介绍低功耗数据采集系统的USB通信接口设计方法。该设计以超低功耗单片机MSP430F13X为主控制芯片,连接Cygnal公司的UART转USB芯片CP2101,实现低功耗数据采集系统的USB接口设计。在要IAREmbeddedWorkbench集成开发环境和VC 环境中,编辑单片机与主机的通信协议。该设计具有超低功耗、高集成度和设计简便等优点,适于便携式电子设备的开发应用。     

基于StrongARM的高级掌上电脑系统设计

本文介绍基于StrongARM110芯片的掌上电脑系统原型机的设计，针对掌上电脑系统低功耗，小体积及便于测试等要求，分析了系统各模块的设计方法及模块之间的互联，并给出了基于该系统的软件开发调试方法。     

一种便携式两轴转台角度测量系统的设计

针对便携式两轴转台,设计了一种基于单片机和高精度电位计的角度测量系统。该系统利用高精度电位计作为测角传感器,以C8051F310单片机为数据采集与处理核心,外加LED数码管,实现了两轴转台的角度测量与指示。系统采用低功耗设计,延长了电池的寿命,同时,过采样技术的采用,有效提高了角度测量的分辨率和信噪比。     

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     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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。