基于LoRa无线技术的动车轴温无线监测系统设计

针对机车机械师和列车安检员不能够及时发现列车热轴现象问题,本文设计了基于LoRa无线技术的动车组列车轴温监测系统,该系统由采集节点和手持监测终端两部分组成.采集节点能够实时通过温度传感器采集列车轴温的温度,一旦温度过度不正常,即通过基于LoRa无线技术的无线模块发送到手持终端,发出告警信号.此外采集节点还具有自检、低电量提醒等功能.手持终端能够实时接收并显示采集节点发送的轴温信息,并能够将轴温信息写入SD卡进行存储,为研究人员后续的研究提供准确可靠的实验数据.该系统经过大量测试,能够满足列车监测需要.     

基于ZigBee技术的嵌入式无线温度报警系统

为了实时分析温度并及时处理危险,设计了基于ZigBee技术的嵌入式无线温度报警系统.系统采集部分由温度采集模块和ZigBee子节点传输模块组成,处理部分由ZigBee主节点及ARM9处理器组成,单片机将DS18B20温度传感器采集到的数据通过ZigBee子节点发送到ZigBee主节点,CPU ARM9分析ZigBee主...     

基于nRF9E5和LabVIEW的无线温度采集系统

采用单总线数字温度传感器DS18B20,以无线射频单片机nRF9E5为核心,实现了多点无线温度采集系统。多个传感节点负责采集温度数据,并无线发送,中心节点通过nRF9E5接收数据后,将采集的温度信息上传上位机,并由LabVIEW软件平台对信号进行显示、分析、存储及报警等。该系统功耗低,测量精度高,界面友好,易于实现。     

多通道无线温度测量系统的设计

温度指标在许多工程项目中是不可或缺的重要参数.针对这一要求提出的多通道无线温度测量系统,采用多个单总线数字式温度传感器DS18B20作为测温节点,PIC16F877A单片机作为下位机微处理器来控制多路温度值的采集,并通过无线收发模块PTR8000进行传输,最后通过RS232串口将数据传送到上位机电脑.实验证明,该系统解决了在复杂环境下温度采集和获取的问题,具有较高的精度和很好的推广应用前景.     

箱式变电站站内温度采集发射器设计与实现

站内控制器放置于变电站内部由温度采集和温度显示电路组成.通过温度传感器将站内温度参数传送给微处理器,微处理器经过处理将温度值通过温度显示电路显示出来,与此同时将温度数据发送到微功率无线模块.     

基于ZigBee的无线温度检测系统

从低功耗、小体积、使用简单等方面考虑连接进行数据传输。这种系统布线复杂、维护困难、成本高,可采用无线方案解决这些问题。无线测温系统是一种集温度信号采集、大容量存储、无线射频发送、上位机、控制与通信等功能于,基于射频CC2430（ZigBee）和数字温度传感器DS1820设计了一个无线测温装置,整个装置由一个无线节点（接点根据需要可扩展到56个）和1个协调器组成。无线节点工作在测温地点,进行温度数据采集和无线发送。协调器与节点进行无线通信将数据显示出来。     

基于ZigBee的无线温度传感器网络的研究与设计

作为一种新兴的近距离、低复杂度、低功耗、低数据速率、低成本的无线网络技术,ZigBee主要用于近距离无线连接。本文设计了一种基于温度传感器的CC2530节点,它以RF（射频）芯片CC2530为核心,在温度传感器DS18B20的配合下,采用ZigBee协议建立了点对点通信组网,能够高效地完成对环境温度的无线检测,实现了无线网络的功耗管理方法、无线网络的配置,利用DS18B20温度传感器检测环境温度、从节点温度数据的发送、主节点对温度数据的接收及上传给上位机显示等内容。     

基于STM32单片机的无线运动传感器节点设计

本文介绍了一个用于移动端反映人体运动与心率状态的无线运动传感器节点设计,同时具有运动分析的功能以及低功耗的特性。系统以STM32F103C8T6作为主控制器,通过ADS1292模块采集心电信号、LMT70模块采集温度数据、ADXL345模块获得运动状态数据,将数据传入单片机后进行分析运算与处理,将获得的心电波形、温度数据、运动数据实时地显示在单片机控制的屏幕上,同时通过HC05蓝牙模块,将数据无线传输至移动端,并在移动端显示。     

基于无线传感器网络的多点测温系统设计与实现

无线传感器网络(WSN)技术具有分布式、低功耗、自组织等优点,广泛应用于环境监测、工业控制等领域。以多点温度测量为例,设计并实现了一种基于WSN技术的多点测温系统。该系统由多个传感器节点组成,通过无线通信方式将温度数据上传至中心节点,由中心节点进行数据处理和显示。系统的硬件平台采用TI CC2530芯片作为主控制器,结合LM35温度传感器和nRF24L01无线模块进行数据采集和通信。系统软件采用Contiki操作系统进行系统的管理和协议的实现。实验结果表明,该系统能够实现对多点温度的准确测量和实时监测,并具有良好的实用性和稳定性。     

基于MSP430单片机的无线温湿度检测系统

介绍了一种基于单片机MSP430F437的新型无线温度湿度检测系统,它由LCD显示屏、数据采集模块、数据存储模块、电源管理模块、无线收发模块、USB串口模块等构成,能够现场实时显示当前环境的温度、湿度值,可通过无线和USB串口将采集数据发送到计算机,在计算机界面同时显示当前温湿度值,可实现多通道同时检测,并支持在线记录测量数据。制作的样机经过测试,证明该无线温湿度检测系统能够准确采集当前温湿度信息,获得的数据比其他方法更加准确,自动化程度高。该系统可以实现在各种环境下温度湿度的检测,具有较好的推广应用前景。     

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。