基于光电复合传感器的重金属检测算法的研究

基于光寻址电位传感器(Light Addressable Potentiometric Sensor,LAPS)和微电极阵列传感器(Microelectrode Array Sensor,MEA)的复合传感器件,作为无线传感器网络的敏感元件,已应用于水环境痕量重金属的检测中.本文基于该光电复合传感器,分别对LAPS及M...     

网络入侵检测系统中动态负载平衡策略的设计

随着互联网的广泛应用,网络信息量迅猛增长,网络攻击数量和方式大大增加,网络入侵检测系统需要部署多个感知器(Sensor)时网络监测和保护,通过增加Sensor,可以增强系统分析检测能力。然而,为了充分利用系统处理能力,需要动态分配处理节点任务,实现动态负载平衡。该文在分析网络入侵检测系统的基础上,提出负载值计算方法,结合通用负载平衡策略,提出了分布式入侵检测系统的动态负载平衡策略,实现了良好的动态负载平衡效果,提高了系统性能。     

基于PIR Sensor的单目标跟踪系统的设计与实现

针对基于热释电红外传感器的人体跟踪系统在实际环境中,由于受环境噪声和硬件参数影响而误差较高的问题,本文提出了一种基于热释电红外传感器PIR Sensor(Pyroelectric Infrared Sensor)的高精度人体目标跟踪方案。该方案首先对检测区域内运动人体热辐射的红外信号特征进行了提取,然后利用PIR Sensor定位节点自身几何参数和探测数据,得到初步定位结果。最后通过Kalman滤波算法对初步定位结果进行滤波处理并更新目标的状态信息,实现对检测区域内人体目标的定位与跟踪。实验表明,该系统的跟踪误差与同类跟踪系统相比降低了71.96%,证明了该系统具有较高的跟踪精度。     

撒布预知下节能算子对Sensor Networks寿命的分析

Sensor Networks是ADHOC的一个重要方面的应用,其特点是节点分布广、随机性强、密度可预测。在可预知的分布中,成功预测了Sensor Networks的寿命,并给出了适合抛撒分布下Sensor Networks的寿命公式与相应的HASH图,以及计算Sensor Networks寿命的具体步骤与方法。     

一种支持异构Sensor的分布式IDS的通信机制

提出了一种新的支持分布式入侵检测通信需求的通信机制。给出了通信机制的体系结构及其实现流程，提出了一种基于XML进行异构Sensor事件一致描述的方法，有效地解决了IDS之间数据共享的问题。针对IDS控制台和检测传感器之间安全数据交换的问题，提出了一种基于SSL和RSA算法相结合的安全通信解决方法。对本通信机制的性能进行了量化分析。     

基于层次模型的航空火控系统检测数据库系统

针对航空火控系统结构和检测的特点，设计了一种基于层次数据模型的航空火控系统检测数据库系统。详细说明了检测数据库的总体结构和各级库的构造，并介绍了测试过程中检测程序对检测数据库的操作方法。通过层次模型的检测数据库描述火控系统检测属性，可实现检测系统与被测对象的分离，达到提高检测系统通用性的目的。     

基于RTMS的高速公路事件检测系统设计

从软件设计与实现的角度出发,以满足现代高速公路运行管理对交通事件检测的需求为目标,探讨了基于远程交通微波检测器(RTMS,Remote Transportation Microwave Sensor)的高速公路事件检测系统的设计方案,阐述了系统软件结构及各模块的功能与实现方案,介绍了应崩于该系统的交通事件自动检测算法.系统通过采集RTMS检测到的交通数据,运用自动检测算法检测高速公路上异常事件的发生,配合使用CCTV监控摄像机进行人工核实,可以更加准确、快速地确认事件,以便交管部门进一步采取相应处理措施.     

Littelfuse宣布收购温度传感器制造商U.S.Sensor

<正>Littelfuse公司(纳斯达克股票代码:LFUS)于2017年7月11日宣布收购U.S.Sensor公司的资产。总部设在加利福尼亚州的奥兰治,U.S.Sensor是一家最严苛的温度传感应用中所用热敏电阻和探头组件的制造商。交易条款并未披露。"U.S.Sensor公司在几个关键的电子和工业终端市场,包括家庭自动化、HVAC和家用电器,拓展了我们现有的传感器产     

车辆倾斜报警器

车辆倾斜报警器是Schaevitz Sensor公司开发出的新型产品，它可和任何车辆主控报警系统接口。这种基于微处理器的报警器可以在出厂时编程，标定为检测报警车辆俯仰或侧倾0．5。角的变化，或适用于更高灵敏度要求的车辆悬挂系统。完善的设计可以排除一些虚假报警因素，诸如过往车辆、飞机，或者风造成的变化或人为的车辆摆动等，     

基于复杂事件处理的WSID网络中间件的研究

射频识别(Radio Frequency Identification,简称RFID)与无线传感器网络(Wireless Sensor Network,简称WSN)融合形成的无线传感识别(Wireless Sensor Identification,简称WSID)网络,既可以识别物体携带标签的的信息,还可以检测物体周围环境的信息,将成为物联网的一个发展趋势;基于EPC体系架构提出一种WSID网络的体系架构,并详细介绍了此体系中间件的设计;运用复杂事件处理技术实时地处理来自分布式RFID读卡器和传感器的大量数据,WSID中间件通过筛选、分组、汇总和构建复杂事件,为用户提供更有意义的数据。     

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.     

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。     

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

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     

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.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.