基于单片机的WiFi智能小车设计

WIFI视频智能小车由马达、小车底盘、电机驱动、舵机、摄像头、无线路由器、控制主芯片MC9S12XS128MAL、电源等主要硬件构成.WiFi视频智能小车利用电脑或手机等配备无线网卡的设备连接路由器,在上位机软件上显示摄像头采集到的通过无线路由器转发的实时视频数据,通过无线路由器将指令转发给主芯片处理,主芯片控制电机驱动就可以完成小车前后左右的动作.     

基于WiFi的智能楼宇监控系统

针对传统智能楼宇可扩展性不足且无线采集终端高成本、高复杂度的缺点,提出一种无线楼宇温度报警与控制系统.对WiFi网络和WiFi嵌入式单芯片进行了研究.通过无线智能终端采集环境温度和工作设备的状态,并利用WiFi网络传给上位机.上位机的监控界面具有查看和控制设备的功能.实现了对室内温度和用电设备的远程监控.     

室内WiFi信号探测设备的设计与实现

WiFi无线技术应用极为广泛,是办公室、餐厅、酒店、商场等公众场合的必备。企业和家庭用户设立了大量的无线热点,增加了WiFi热点管理的难度。该文使用树莓派和esp8266单片机,设计与实现了室内WiFi信号的探测设备。它通过测量信号强度rssi值,计算WiFi热点的距离,然后使用三角定位方法,计算各个WiFi热点的坐标值,使用图形界面显示各个WiFi热点的位置。该设备应用了热门的树莓派主板,使用Python编程,通过树莓派GPIO端口控制传感器和读取数据,加速了设备的开发过程,基本实现室内WiFi信号的探测功能。     

基于光电传感器的移动机器人室内定位

设计了一种基于光电鼠标和电子罗盘的机器人定位系统.通过放置在小车尾部中央位置的光电鼠标芯片测出X和Y的单位时间内的位移数据,经过STM32处理得到坐标值,并将小车的坐标值等信息显示在液晶屏上.通过电子罗盘得到小车的航向.在获取小车坐标与方向后,上位机通过无线模块向小车发送控制命令,从而控制小车的行驶轨迹,并将行其显示在上位机界面.经实验测试,测量位移的定位误差在0.45％,可以达到满足机器人室内定位系统的要求.     

基于WiFi和IMU结合的室内定位方法的研究

针对单一的WiFi定位误差较大的问题,提出了利用IMU人体姿态传感器来辅助WiFi进行室内定位的方案。首先在实验场所建立合适的WiFi位置指纹库,然后利用改进的K-NN算法对终端进行实时定位。同时利用IMU所测得的角度变化和终端前一个位置的坐标来判断终端处于哪一个象限,再和该象限的WiFi指纹库进行匹配计算出终端的坐标,从而不仅缩小了算法的复杂度,也提高了室内定位的精确度。     

OneNET云平台WiFi远程控制的智能教室系统

针对高校多媒体教室管理效率较低这一问题,提出一种基于物联网技术的自动控制系统.以STM32单片机作为主控制器,利用WiFi组网,配合传感器和易于安装的开窗装置,通过系统自动调节或PC终端远程控制,就可以实现对室内光线强度、温度和CO2浓度的控制,使现有的教室更加舒适,有利于提高学习效率.本系统亦可推广应用于人员密集的场所.     

基于无人车自动构图导航系统的设计与实现

为了解决复杂环境下无人驾驶小车的定位导航问题,提出基于激光雷达SLAM技术的无人车自动导航系统。采用SSH远程登录协议实现PC端的命令控制,通过无线传输协议将手机终端数据传送到无人车,利用手机终端对无人车进行地图构建和自动导航操作。操作人员无需手动控制躲避障碍物,只需在手机端设定终点即可实现小车的自动导航功能。最后,选择室内环境进行测试分析。结果表明,该系统实现了无线传输、远程监控以及自动构图导航的设计目标。     

无线视网膜成像系统

针对传统检眼镜、眼底照相机等眼科检查设备结构复杂、移动性差、不能实时观察视网膜情况等缺陷,设计和实现了一种无线视网膜成像系统.对视网膜图像获取和WiFi无线局域网技术进行了研究,通过WiFi无线局域网技术、HTTP网络编程,用装有网卡的PC机远程控制眼底照相机采集视网膜图像,并将图像进行实时传输、显示和保存.最终将装有网卡的PC机与眼底照相机通过WiFi相连接,方便快捷的完成视网膜图像的无线采集和实时观察,为医生提供眼科疾病诊断、治疗的客观依据.     

基于STC12C5A60S2单片机的视频遥控小车设计

该文对视频遥控小车进行了深入的研究,设计出了一套基于STC12C5A60S2单片机的视频遥控小车系统。为了能够远程控制小车的运行状态,采用无线视频发射与接收模块将小车在现场采集到的视频信号显示在PC机上,以便控制室的人能够观察到小车现场的实时情况,利用无线数据传输模块完成主控体对小车的控制及小车运行状态的反馈,最终实现了小车的远程实时控制。     

基于ARM和嵌入式Linux的智能小车技术实践

论述基于ARM和嵌入式Linux的WiFi无线遥控智能小车的技术实践.介绍技术实践的过程、方法、经验体会.采用ARM 11芯片作为小车的主控制器.小车上的WiFi模块承担无线通信功能并接收来自远程Android智能手机的遥控指令.智能手机可通过“重力感应”或传统“按键”两种模式向小车发送遥控指令.ARM控制器接收到指令后通过GPIO接口控制小车的电机驱动小车的四个轮子做出相应动作（前进、后退、转弯、旋转等）,并通过PID算法控制小车走直线.小车可采集视频并运行计算机视觉算法进行实时人脸检测.     

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.