基于SN8P1917微控制器的输液无线自动呼叫系统

介绍了一种基于SN8P1917单片机的输液无线自动呼叫系统.该系统包括发送终端和接收终端;文中详细地介绍了发送终端的电路原理,同时也简要介绍了接收终端的原理;采用了高精度称重传感器来计量输液的重量,保证了系统的安全可靠;系统数据采用无线传输,安装简单便捷,接收终端具有声光报警,同时通过上位机可以实时查阅相关数据,系统设计优化,运行稳定可靠.     

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WIFI的无线声表面波传感器信号采集系统

将声表面波传感器与信号无线保真(WIFI)技术相结合,提出了一种基于WIFI的无线声表面波传感器信号采集系统.该系统由声表面波传感器、信号调理电路、处理器、WIFI模块和无线接收终端组成.声表面波传感器混频后的信号经过信号调理电路后,转换为处理器可计频的低频方波信号,并通过WIFI模块将采集到的信号无线发送到接收终端.通过一个输出信号范围在100 kHz~350 kHz声表面波传感器信号采集系统的实现,对该系统的结构、性能进行了验证和测试.实验结果表明,该系统可以实现测试范围内信号的采集、发送和无线接收,系统输入信号与无线接收终端接收信号之间的平均绝对误差为0.843 kHz,最大相对误差为0.51%,无障碍环境有效采集范围约为100 m,有障碍环境有效采集范围约为50 m.     

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。     

基于LabVIEW无线数据控制与传输系统的设计

将无线传输技术与虚拟仪器技术相结合,设计了一种数据控制与传输系统.该系统具有控制指令发送、数据发送和数据接收3种工作方式,控制指令和传输数据两种信息类型.通过系统结构设计、电路设计、通信协议设计、软件设计、LabVIEW系统界面和USB驱动程序设计等,该系统可以向微处理器发送控制指令信息,设置上位机和下位机工作模式和工作参数,实现传输数据信息发送和接收的半双工通信功能.整体设计表明,为无线数据的控制与传输提供一种设计方法.     

基于蓝牙传输的智能车信号检测系统研究

设计了基于蓝牙传输的电磁导航智能车磁场信号检测系统。采用工字型电感线圈作为传感器,通过MATLAB对电感线圈在磁场中的特性进行了仿真分析,优化了传感器的排布方案。系统下位机以MC9S12XS128单片机作为信号采集的核心控制器,选用蓝牙模块作为无线发送与接收设备,利用LabVIEW 2012图形化编程集成开发环境编写上位机程序,最终实现了单片机与PC的无线数据互传。实验结果表明,该系统能够实时检测出智能车与导航线的相对位置,并可方便快捷地进行导航路况判断与速度给定。     

家庭远程监控报警系统的设计与实现

介绍了基于无线收发芯片CC1110和GSM网络的无线监控报警系统,该系统由控制板和终端板组成.终端板连接各种传感器和执行机构作为数据采集点和控制端,控制板负责接收和分析各个终端板发送的数据,并通过GSM网络以短信形式将设备的状态或报警信息发给用户,而用户用短信形式将控制命令发送给控制板,实现对家庭远程的监控.     

一种气象数据采集传输系统的设计

针对气象检测的需求,提出了一种基于手机和无线传感器网络的数据采集和传输方案,详述了系统设计的原理与软硬件的实现方法。系统以无线通信模块CC2430为采集节点,利用传感器采集数据,通过ZigBee实现对采集数据的无线发送和接收,并通过J2ME编程在手机上实现了气象参数的实时显示、存储和远程上传。本设计具有组网灵活、低成本、功耗小、可靠性高等特点.     

ZigBee结合GPRS的无线自组网的数据传输系统

为解决数据通过无线自组网远距离传输所存在的问题,设计了ZigBee结合GPRS的数据传输系统。介绍了系统的硬件架构以及终端通过路由转发数据的过程,同时对终端节点发送、路由转发及数据上报到网关等环节进行了软件设计;最后对系统运行进行了测试。测试结果显示,数据可以稳定地从终端节点传输到服务器端,系统有效地实现了数据在无线自组网中的远程传输。     

PVDF传感器和WSN的振动信号测量系统

为了满足振动传感器阵列对多点信号实时传输的要求,研制了一种基于压电薄膜(PVDF)传感器以及无线传输的振动信号测量系统。该系统包含振动信号采集模块及主控单元,前者集成了振动信号调理电路、ATmega8A微处理器以及nRF24L01无线传输模块,用于采集来自PVDF传感器的振动信号以及实现信号调理和无线传输功能;后者包括Cortex-M3微控制器、SD卡和无线接收模块,用于实现传感器数据的接收和存储。实验结果表明,本系统能够实现准确的振动信号测量以及实时、可靠的数据传输。     

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。     

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.