基于天通卫星移动通信系统的数据实时传输模式

为发挥出卫星数据信息采集、传递系统的作用,进行数据信息的大规模接收、处理和传递,文章利用文献调查法,针对基于天通卫星移动通信系统的数据实时传输模式展开了研究,提出了数据传输终端模块设计的设计方法。该方法包括硬件设计、天通卫星通信模块设计、北斗定位模块设计,并指出了系统搭建策略,包括信关站、采集信息接入中心、数据服务中心、数据采集终端以及话音通路数据传输,旨在为新时期移动通信系统的数据实时传输提供理论参考。     

基于ARM11的实时车位查询系统设计

驾驶员在车位紧张的街区经常因为盲目寻找空车位而烦恼。针对停车难和寻车难的问题,设计了以S3C6410微处理器为核心的车位实时查询系统。本系统利用GPRS无线通信技术将GPS定位信息传输到信息处理中心服务器,实现对停车位信息的实时查询,待停车后系统终端通过AT指令控制GSM模块将停车位信息发送到用户手机,方便用户返回时快速找到车位。实验测试表明,GPRS发送GPS定位信息准确,停车位信息反馈及时,满足用户对停车位实时查询的要求。     

GPRS与GPS在汽车信息服务系统中的设计应用

本文分析了基于嵌入式处理器(Intel SitSang)的汽车信息服务系统。该系统由ARM9嵌入式处理器模块、GPRS模块、GPS模块、汽车安防信息采集和内部故障检测模块、LCD显示模块以及中心台等部分组成。重点介绍了GPRS模块和GPS模块的嵌入式开发．以及如何应用这两个模块实现短信息收发、定位信息的采集和电子地图显示、定位信息和汽车状态故障信息的传输、用户和控制中心台实时的交互、Internet的实时接入与通信等系统功能，实现了一种智能交通系统的可行方案。     

一种车辆实时监控系统设计

基于STM32单片机,设计了一种车辆实时监控系统。该系统通过GPS模块、车载传感器采集车辆行驶状态数据,利用蓝牙模块实现和手机的近距离数据传输,利用4G无线模块实现和云端服务器的远距离数据通信,从而在手机端和云端服务器均可对车辆行驶状态进行实时监控,包括对异常数据的报警处理等。测试结果表明,该系统可实现车况的实时监测、报警等功能,具有一定的实用性。     

热电机组远程无线监测系统研究与设计

为满足发电厂对安全性及经济性的需求,基于ARM与3G技术设计了热电机组远程无线监测系统,提出了新型16/32位ARM11微处理器S3C6410与3G模块DTM6211组合实现数据采集、传输的设计方案。介绍了监测系统中的数据发送和组网流程。由某热电机组测试结果及传输试验表明,该系统硬件结构相对简单、可扩充性强、建设和使用成本低、网络传输速率高、实时性强,能对发电厂电力设备运行参数进行实时远程监控。     

基于NiosII和3G无线网络的远程数据传输系统

为了实现有线网络难以覆盖的远程数据传输,设计了基于NiosII系统的远程数据传输系统。系统中使用FPGA芯片的IP核构建NiosII控制系统和与3G模块通信的UART接口,同时设计了数据传输控制程序和通信协议,实现了通过3G无线网络的数据远程传输。针对电力系统的远程数据采集进行了测试,系统功能完善,运行可靠。     

基于DSP的EASI十二导联多功能Holter系统

一种以数字信号处理器(DSP)为核心,具有实时检测、无线传输和24小时心电数据连续记录功能的多功能Holter系统。在该系统中,通过EASI导联系统模块采集心电信号,然后采用小波变换算法对心电信号进行实时特征提取,并将心电数据存入MicroSD卡实现24小时心电数据记录;或者通过Zigbee无线传输模块将心电数据传输到电脑进行远程实时监测及十二导联心电数据的推导。     

GPRS在移动多媒体应急指挥系统中的设计与实现

本文提出了一种基于GPRS/GPS/GTV-100的移动多媒体应急指挥系统。系统采用GPS动态定位、GPRS双向数据传输、GTV-100微波设备实时传输音和视频;采用无线通讯和控制,保证了系统的灵活性和机动性。文中对指挥系统的组成及原理进行了介绍,对如何应用Motorola G20模块构建GPRS网络通信及控制中心通信模块的设计进行了阐述;最后分析说明明了如何采用G20、GSU-36和GTV-100进行车载移动终端的硬件设计实现。不同环境下进行的大量实地测试表明,系统工作稳定,效果良好。     

AM3359的钢轨实时检测与数据融合无线传输

针对钢轨轮廓检测时,数据量大且后期分析计算算法较为复杂这一特点,设计了一套钢轨轮廓检测与数据无线传输系统.该系统主要由激光二维传感器、以太网收发器、AM3359核心微处理器、U BLOX定位模块与4 G通信模块组成.利用激光二维传感器采集钢轨轮廓数据,同时U BLOX接收GPS卫星给出的地理坐标信息.AM3359对钢轨轮廓数据与地理信息数据进行数据融合,并最终利用4G模块通过Internet上传至云端服务器进行后续数据处理.该系统具有功耗低、检测精度高、数据传输距离不受制约等特点.     

基于3G和ZigBee的蔬菜大棚远程无线监控系统的设计

设计一套智能蔬菜大棚远程无线实时监控系统。该系统由监控终端节点、网关节点和监控中心组成。监控终端采用以CC2533为核心的ZigBee模块,构建ZigBee星型结构的无线传感网,实现蔬菜大棚中的环境数据智能化采集;网关节点以ARM10微处理器PXA270和Linux操作系统为核心进行开发,使用ZigBee通信实现数据的汇聚和3G无线通信技术实现数据的远程传输。该系统不仅满足了数据采集和数据传输的安全和性能要求,而且很好地解决了传统的蔬菜大棚系统的布线麻烦、节点不易移动和系统维护复杂等问题,满足了智能蔬菜大棚中环境参数监测的需要。     

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.