GPRS无线数据传输终端的设计和实现

GPRS通用分组无线业务在当前远程数据传输、遥测遥控中越来越受到人们的重视,特别是基于单片机的GPRS数据传输方案在GPS车载终端、自动抄表系统等远程遥测遥控系统中的应用更是倍受关注。文章论述了基于WAVECOMQ2406B无线模块、AT89S51单片机的GPRS数据传输终端的设计方案,并提供了硬件电路图,软件流程图及程序代码。     

基于8位单片机的小型机器人系统的设计与实现

设计并制作了以AVR单片机ATmega16L为控制器的小型机器人、以AT89S52为MCU的51单片机实验板和UART串行通信接口等部分构成的硬件系统。根据具体硬件系统的特性,用C和C++语言开发了机器人串口调试软件与综合控制软件。实现了无线遥控或远程网络控制机器人完成前后行走、翻跟斗、跳舞,并由机器人变形成小车,以及小车的前后左右行驶,再由小车变形成机器人等功能。     

基于蓝牙的无线接入点设计

以51单片机P89V51RD2为主控制器、ROK101008为蓝牙模块、W3100A为TCP/IP硬件协议栈、以太网网卡芯片RTL8201为网络接口,介绍了一种基于蓝牙的无线接入点的硬件结构和软件流程.该设计支持TCP/IP协议和蓝牙协议,具备蓝牙设备的无线上网功能,通过Internet实现数据的远程传输.     

远程无线多路视频处理系统设计与实现

为便于对远程试验目标区域进行实时视频监控,采用无线遥控发射和接收以及多通道视频等处理技术,研制具有遥控功能的远程无线多路视频处理系统。系统采用嵌入式单片机对多路视频处理芯片进行控制,根据系统串行接口接收的远程遥控指令,完成遥控指令的解码、摄像头云台控制、多路视频信号的复合、多路视频信号单路显示等处理。设计的系统成功应用于某靶场远程试验系统,具有成本低、可靠性高等特点,并取得了理想的应用效果。     

POCSAG解码器设计

单片机POCSAG解码器是寻呼技术用于无线远程遥控，信息无线传输的主要装置。本文叙述了解码器硬件设计的原理、技术要点及可能出现的问题的解决方法。     

基于BU65170与单片机系统的RT设计与实现

为实现有效载荷上MCU与1553B总线间的通讯,采用总线协议芯片BU65170,设计了与单片机的硬件和软件接口,将有效载荷作为一个远程终端(RT)挂接到1553B总线控制器(BC)上,实现了以单片机处理器为核心的有效载荷测控系统与1553B总线间的指令通讯和数据传输。     

基于单片机无线通信的应急交通控制研究

研制了基于单片机无线通信技术的应急交通控制系统.系统采用AT89C52作为核心控制器,手持遥控端的AT89C52单片机实现控制命令的判断、编码和经ZT-TR43S无线数传模块发送;路口控制机执行预先设定的交通信号控制方案,当接收无线信号后转入相应的应急控制程序.本文介绍了系统的总体方案、部分硬件设计和软件设计.     

短消息控制器在中央空调远程监控中的应用

针对目前中央空调控制系统远程监控的需求,结合单片机技术和GSM无线通信技术,提出了一个基于短消息方式的远程监控系统的设计方案;该系统采用自主研发的短消息控制器以实现远程监控功能,软件部分采用C语言进行模块化编程;文章具体介绍了系统的硬件实现和软件设计,并给出了部分代码;该系统具有硬件实现简单、低功耗、软件可扩充性强以及控制方式灵活有效等特点,其设计思想对于当前中央空调控制器的设计有相当的参考价值.     

基于SMS的无线家电控制系统

本文介绍了一种使用SMS(手机短信)的无线家电控制系统,其主要思路是GSM MODEM和红外线遥控的结合应用。GSM MODEM收到短信后,通过SRWF-1无线模块,发送控制数据给单片机控制器,由单片机控制器发射红外线控制信号,完成对家电的控制。当需要控制家庭中的多个电器,可建立一个控制网络。由于本系统采用无线方式,不会破坏家庭已有的装修,有一定的实用性。     

基于单片机的智能遥控风扇控制

为了让普通的风扇具有远程无线遥控、温控等智能化特性,本文设计了一种以STC12C5A60S2单片机为基础的智能风扇遥控系统,该系统借助DS18B20温度传感器将采集的温度通过H桥完成风扇电机的驱动,具有安全、可靠、节能及环保的优势,应用前景十分广阔。     

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.