基于CC3200的气象数据采集与远程通信系统

针对我国草原牧场环境数据采集的需求,同时为了解决气象站数据传输与远程监测问题,提出了一种基CC3200芯片的数据实时检测与远程通讯的自动气象要素采集系统设计方案。由德州仪器推出的CC3200器件,其主控芯片内置具有Wi-Fi功能的无线MCU,其上包含嵌入式TCP/IP和TLS/SSL堆栈,以及多个互联网协议,支持CC3200器件为采集节点同时作为HTTP 客户端,并以无线方式传递数据。无线AP模式下的Web服务器以REST API接口接收气象数据,用户可通过网页实现远程监控牧场环境数据。     

基于嵌入式系统的测冰雷达数据远程实时读取系统的研究与实现

介绍了一种结合Internet网络和嵌入式技术的测冰雷达探测数据远程读取系统。系统基于树莓派构建嵌入式系统,采用nginx和sqlite分别构建Web服务器和相应的数据库;树莓派通过USB接口采集测冰雷达的冰层厚度探测数据,并外接USB无线网卡通过无线局域网发射器接入Internet网络;远程移动终端作为数据读取方,通过中国移动3G网络访问树莓派上所搭建的Web服务器,最终以FTP页面形式下载所采集到的冰层厚度数据,并以HTTP页面形式绘制冰层厚度报表呈现给用户,实现冰层的实时观测。实验表明,系统实现了远程实时读取测冰雷达探测数据的目标,解决了传统测冰雷达探测数据先存盘后处理的低实时性问题。     

基于物联网的罐区火灾安全监测报警系统的设计

油库火灾事故在油库事故中占比最高,为了保障油库罐区安全,本文介绍一个基于物联网的火灾安全监测报警系统,叙述系统设计原理和实现方法。该系统采用S3C6410A核心板作为监测控制器,控制中心协调器连接路由节点和终端节点组成无线物联网,然后通过该无线网向终端节点发送采集命令,无线传输采集数据;监测控制器对采集数据进行数据存储,处理,如异常自动联动报警。监测控制器提供嵌入式Web服务,能独立地提供远程WEB监测服务。火灾安全监测报警系统提高了罐区控制的安全性、可靠性及自动化水平。     

基于LTE/WLAN的车辆电池实时监测系统

针对车辆电池电压与工作温度实时环境状态能够实现远程监测,设计并利用嵌入式微处理系统结合4G通信技术和无线局域网搭建远程终端监测通信系统平台.系统客户终端进行数据的采集及实现短程和远程数据通信,系统的服务器采用Linux系统的PC机和Android系统的手机对进行数据接收.实验过程中,整个系统对电池组电压和运行温度环境有准确的实时远程监测,数据显示电压的误差低于1%.整个系统运行稳定,性能可靠,为管理人员对现场的了解提供了便利.     

基于无线传感网络的环境监控系统

为了实现对环境系统的动态远程监控,设计了一种基于Zigbee的无线传感网络监控系统.Zigbee无线数传终端模块通过内置的单片机系统,实现了不同传感器的接口协议,并对传感器数据进行了实时读取、编码与发送;系统中的协调器实现对数据包的接收、解码、验证并将正确的数据转发数据至服务器;无线传感网络中引入了ZStack协议,从而实现了对无线终端与协调器节点的动态增删;监控终端分为桌面与移动端,通过无线网络访问服务器中存储的数据,实现对环境系统的远程实时监控.     

基于GPRS的下水道气体远程监测系统设计

为了提高城市下水道气体监测的实时性和可靠性,设计了基于GPRS的下水道气体远程监测系统;该系统主要包括前端气体采集模块、GPRS数据无线传输模块、数据接收模块及监控中心;气体采集模块由气体传感器和数据采集单片机组成;单片机实时采集气体传感器中的数据,并将采集到的数据通过GPRS无线传输模块进行实时上传;数据接收模块把接收到的数据传送至监控中心服务器,由服务器对数据进行处理、显示、存储和统计等;通过对18个监测点的监测实验效果表明,该系统运行稳定可靠,能实现对下水道气体远程采集、无线传输和实时监测的目的。     

基于NB-IoT的农业灌溉水渠远程监测系统设计

为了满足农田信息采集与智能水利检测技术的发展,进一步优化现有的智能监测水渠水利系统,设计了一套基于NB-IoT的农业灌溉水渠远程监测系统,系统包含监测节点、NB-IoT通信模块和远程服务器三部分。监测节点采用STM32F103RCT6为微控制器,定点采集所在位置的农田信息与灌溉水渠信息,并通过NB-IoT通信模块发送至远程服务器。远程服务器一方面解析接收的参数信息,实现数据显示与地图定位等功能,另一方面将接收的参数信息保存至TXT文件中,便于后续数据分析与历史查询等操作。在远程服务器设置参数阈值信息,可以反馈至监测节点完成预警判断与远程报警。测试结果表明：监测节点以3小时为时间间隔进行一次参数采集,参数信息到达远程服务器的时间差控制在80 ms以内,地图显示的定位误差在2 m以内,达到了系统设计的参数要求,为水渠水力智能化监测提供了有力保障。     

嵌入式手持无线农产品价格信息采集终端

手持无线农产品价格信息采集终端采用ARM-Linux嵌入式体系设计,通过GPRS无线网络向远程服务器上传农产品价格信息同时接收系统的采集指令.手持终端利用Qtopia core用户界面支持,提供了友好的用户界面,并利用嵌入式数据库实现农产品种类和历史记录的管理,使用户操作简单、直观、方便.手持无线农产品价格信息采集终端为农产品价格采集系统提供了具有良好用户体验的终端设备,为在全国范围内实现农产品价格监控提供了技术保障.     

基于ZigBee网络的室内环境监测预警系统设计

针对传统室内环境监测系统布线困难、灵活性差的弊端,设计了一种基于ZigBee无线传感器网络的室内环境监测预警系统;该系统综合运用了ZigBee网络通信技术、嵌入式Web服务器技术和GSM通信技术,利用终端节点对室内温湿度、一氧化碳体积分数、甲醛浓度等环境信息进行实时采集和监测;用户可通过打开Web网页完成对室内环境的本地和远程监测,当发生火灾或者煤气泄漏时,用户会及时收到报警短信;实验证明:该系统具有工作稳定、使用简单、灵活性好的优点,具有较高的实用价值与广泛的应用前景。     

基于51系列单片机的无线环境监测仪的设计与制作

基于51系列单片机的无线环境监测仪以STC89C52RC单片机为核心,通过RF1100无线收发模块,配以外围电路实现指令发射、接收、信息处理、存储、控制等功能。传输采用433MHz载波、GFSK调制方式。周边环境温度和光照信息的监测采用DS18b20和RPR220传感器实现,整个系统的硬件设计由一个监测终端和一个实作的探测终端构成。设计采用的器件,性价比高,功能完善。经测试,此设计能够高效的完成各种环境下信息的采集、处理等。     

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。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.