采用AVR控制器的GPS授时与定位装置的设计与制作

以解析GPS的时间信息和位置信息为目标,通过使用嵌入式GPS模块和AVR控制器,设计和制作GPS授时与定位装置,实现时间信息和位置信息的解析和显示等问题;首先给出了基于GPS模块和AVR控制器的授时与定位装置的整体构架,然后对各个部分的硬件进行详细设计,给出了硬件设计电路和软件设计框图;最后对所设计的基于GPS模块和AVR控制器的授时与定位装置进行实物制作,证明了设计内容的正确性和可行性,具有一定的实际应用价值。     

基于FPGA的GPS同步授时与守时方案设计与实现

针对电力系统异地实时同步测量中时间同步的问题,设计并实现了一种基于FPGA的电力系统GPS同步授时与守时方案.运用了平均值减小误差的思想,给出了方案的总体硬件设计以及芯片选型,重点介绍了FPGA内部功能模块设计,主要包括初值计算模块、平均值计算模块、平均值记录模块和PPS(秒脉冲)生成模块等,使用VHDL对各模块进行软件设计并提供了设计思路.通过硬件实验验证,无论卫星是否失锁,都能保证GPS长时间的高精度授时.     

基于ATmega128的GPS时钟设计与实现

介绍了采用GPSOEM接收板的精确授时功能来实现精密时钟系统的设计思路和方法，给出基本的硬件电路和软件流程并基于ATmega128单片机上实现GPS时钟的提取并在LCD上显示。     

基于单片机的公交车智能报站系统设计

本文提出了用51单片机控制语音模块,GPS等模块进行公交车语音智能报站的方法,设计包括硬件和软件设计两个方面,硬件部分采用STC89C52RC单片机作为主控器,利用BS-280GPS模块采集经纬度信息,使用ISD4002语音芯片建立语音信息库,负责播出各个站点信息,同时运用LCD12864液晶显示器显示站名。软件部分利用keilC51进行C语言编程,把程序烧入单片机。启动系统,GPS模块采集经纬度信息,当公交车和站点的距离在10m左右时,语音提示并且LCD显示此站点和下一站点。相比于传统公交车报站系统,此系统结构简单,定位准确,使用方便智能,对社会和科研都有一定的利用价值。     

一种基于GPS技术的新型无线传感网络节点设计

针对无线传感网络节点定位的需要,文章给出了一种基于高性能先进精简指令集机器（ARM）STM32系列微控制器,GPS模块以及CC2420射频通讯模块构成的新型无线传感网络节点的设计方案,分析了采用STM32微控制器性能优势,以及GPS坐标数据提取方法;文章给出了系统组成设计;重点阐述了节点的硬件设计,以及接收GPS模块数据的处理程序设计。     

显示仪表中的GPS串行数据接收

某仪表显示设备中需在GPS定位状态下,从GPS接收机接收并解析GPS定位信息进行显示。根据任务需求及设计约束,该显示设备选用80C32单片机作为任务主处理器。由于80C32单片机I／O、中断等资源有限,如果直接采用单片机I／O口接收GPS数据,则可能无法保证设备中其他显示、通讯等功能的实现。文中基于单片机系统提出一种用双64位移位寄存器对128位GPS串行数据进行接收的电路设计思想。该电路设计节省了系统资源,简化了软件设计,同时经过了飞行试验验证。     

新型单微机多屏幕信息显示系统

论述了单微机多屏幕信息显示系统的基本概念和工作原理，给出了该系统的整体构成框图、系统性能和主要特点，并较详细地分析了系统软件的各个功能模块以及硬件电路的设计思想。     

基于MiniGUI的GPS自动定位系统设计

为方便获取移动目标的位置信息,提出了基于MiniGUI的嵌入式GPS的自动定位系统的硬件及软件设计方法。硬件采用ARM7内核嵌入式处理器LPC2103,使用GPS模块接收地理位置信息,设计了系统LCD、GPS接口、键盘以及最小系统硬件电路。软件采用μC/OS-Ⅱ操作系统,进行系统软件多任务管理,使用MiniGUI制作图形界面,并显示数据。制作了样机并进行了实验,实现了系统要求的各项功能。     

基于IDP卫星通信模块的远洋船舶实时监控系统

针对远洋中无GPRS信号不能进行无线通信的问题,设计了以STM32F103VCT6单片机与IDP卫星通信模块为平台的远洋船舶实时监控系统。本系统具有高精准度、实时性强、全天候监控等特点。给出了系统的工作原理、硬件设计与软件实现方法,详细分析了中央控制模块、GPS定位信息采集模块、无线通信模块。实验结果验证了采用STM32F103VCT6单片机与IDP卫星通信模块设计远洋船舶监控系统的可行性。通过该系统,可实时监控远洋船舶的地理位置信息以及其他信息,最大限度地确保远洋船舶航运中的安全。     

基于ZigBee和GPS广播电视时钟授时系统的研究

介绍了一种应用于广播电视方面的高精度时钟授时系统。该系统可以通过无线电广播的整点报时信号或中央电视台16行时间编码脉冲信号或GPS卫星接收数据中的标准时间进行校时。三种方式互为备份,提高了系统安全性。通过ZigBee无线方式将当前的精确时间发送到各个时钟发布点,无须布线,提高了系统的抗干扰性。文中详细介绍了此时钟授时系统的系统结构。系统采用基于PIC18F4620为核心的控制单元,完成了系统硬软件设计,给出了系统硬件体系结构图和系统软件设计。     

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。