2007北京邮电大学“电子创新杯”电子设计大赛 简易多功能晶体管图示仪

晶体管图示仪器是用来测量晶体管输入、输出特性曲线的仪器。在实验、教学和工程中通过使用图示仪,可以获得晶体管的实际特性,能更好的发挥晶体管的作用。本文所介绍的简易晶体管图示仪制作简单、价格低廉、使用方便,可以满足对于数值精度要求不高的场合。     

基于Android蓝牙聊天系统的设计与实现

针对当前Android在移动互联网市场份额的日益增长,以及蓝牙作为短距离无线通信技术的流行,通过研究Android应用程序组成和Android中蓝牙的实现,最后设计实现了基于Android平台的蓝牙聊天系统。总体来说,文章所设计的蓝牙聊天系统具有性能强、通用性好以及扩展能力强等优点。     

简易多功能晶体管图示仪

晶体管图示仪器是用来测量晶体管输入、输出特性曲线的仪器。在实验、教学和工程中通过使用图示仪,可以获得晶体管的实际特性,能更好的发挥晶体管的作用。本文所介绍的简易晶体管图示仪制作简单、价格低廉、使用方便,可以满足对于数值精度要求不高的场合。与普通示波器配合使用,即可测量小功率NPN、PNP管的输入、输出特性曲线。另外本设计还扩展了晶体管极性判别,晶体管放大倍数测量、显示和语音播报功能。     

RFID技术在Android系统上的应用实现

在物联网的时代背景下,Android智能手机系统和蓝牙等无线技术的应用范围越来越广。Android平台下各个功能模块和无线技术已成为当今研究的热点。通过分析Android平台下蓝牙自底向上的所有技术细节,并通过蓝牙将Android设备与RFID设备进行连接使用,来促进Android平台下蓝牙技术的发展和应用,进而促进物联网的发展。     

Android平台单主机与多从机自配对蓝牙通信研究

以往关于Android平台蓝牙通信的研究大多是一对一的模式。笔者在一对一蓝牙通信的基础上,更深层次研究了Android平台上单主机与多从机自配对的蓝牙通信,详细阐述了如何实现一台安卓蓝牙手机与多台安卓蓝牙手机的双向数据交换。蓝牙连接过程智能、安全,无需用户手动配对,并在应用内进行了加密连接,以期为需要开发Android一对多蓝牙应用的开发者提供指导和参考。     

基于Android的脉搏血氧仪的设计与实现

为了给医生提供快速、直接、有效的血氧数据,本文提出一种基于Android平台实现血氧监控功能的脉搏血氧仪设计方案。介绍基于单片机的血氧仪硬件平台搭建并详细描述客户端软件实现。通过蓝牙实现上位机和下位机之间的无线通信。客户端可以实时显示血氧数据信息,实现数据实时可视化,并将血氧数据存在SD卡上供医生诊断分析。     

基于Arduino的蓝牙无线控制小车的设计

车联网是物联网技术在交通系统领域的典型应用。结合Android手机平台及Arduino单片机平台,借助蓝牙通信技术,实现智能小车的无线控制。该设计把蓝牙技术、Arduino开发技术和Android移动智能终端平台相结合,通过移动智能终端和蓝牙无线,控制智能小车运动状态,实现蓝牙小车的前进、后退、左拐、右拐和停止,并增加体感遥控设计,方便用户体验,为现代物联网设计提供一定参考。     

智能手机模拟蓝牙键盘——基于Android平台的实现研究

该文主要分析如何在现今非常红火的Android平台上,利用Android现有架构实现智能手机模拟蓝牙键盘的功能。侧重点在于其原理及实现方案要点,不深入探讨实现的代码细节。     

基于Android的蓝牙通信程序设计

分析了蓝牙协议结构和核心协议,介绍了基于Android平台的蓝牙通信程序实现方法和基本设计步骤,采用MVC三层模式对蓝牙通信程序进行实现,给出了数据交换层的关键代码.     

基于Android的心电监护软件系统设计与实现

为了降低移动心电监护成本,充分利用智能手机等移动设备资源,提出了一种基于Android平台的心电监护软件系统,结合Android平台的特点,利用Android的通用框架完成软件系统开发.软件系统使用蓝牙、串口等与心电采集模块通信,获取心电数据并在移动设备进行实时分析,利用3G等无线网络技术接入互联网,实现心电数据的远程传输.实验结果表明,该心电监护软件系统可以完成心电实时监护、分析和传输.     

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.