应用于出租车稽查管理的RFID系统设计

针对出租车稽查管理设计产业化射频识别(RFID)系统,使用2.45 GHz有源RFID技术,硬件包括电子标签和微波识别器等,综合应用射频识别、无线通信、计算机通信技术以及数据库技术,实现对出租车的有效稽查和监控。实测结果表明,所设计的RFID系统的性能满足应用需求。     

基于RFID与二维码技术的畜产品可追溯系统设计

近年来,国内外各种重大畜禽产品安全事件频繁发生,而运用监控、预警等技术在食品生产、流通等关键环节上进行的质量监控是有效保障食品质量安全的重要手段。文章介绍了射频识别技术与二维码技术,提出了一种基于RFID射频技术与二维码技术的畜产品可追溯系统的解决方案,并给出了具体的系统设计方案。该系统不仅为消费者提供详细的畜产品来源信息,而且为实现肉品预警和追溯提供了可能。     

基于射频识别技术的出租车防伪管理系统的设计与实现

综合运用2.45GHz有源射频识别(RFID)射频识别技术、信息处理技术、通用分组无线业务(GPRS)通信技术、全球定位系统(GPS)定位技术、移动计算与网络技术,设计了出租车防伪管理系统软硬件架构,开发出2.45GHz有源标签和具有识别、定位导航、移动通信功能于一体的信息终端。同时,在分析系统应用模式的基础上,开发出系统上层应用软件。搭建的应用系统测试结果表明：该系统超低功耗工作,标签峰值电流仅2mA;数据实时性高,传输平均延时小于4s;RFID感知终端有效识读距离达到110m,并能同时识读不少于150个标签。     

有源RFID的性能及其应用前景

射频识别(RFID)是一项新的识别技术,其传输数据率高、通信距离长和可靠性高等优点使之超越条形码和IC卡成为下一代识别技术。RFID可以分为有源和无源两大类,其中尤以有源技术较为突出,因而被广泛地应用到公路收费、港口货运管理等应用中,具有广阔的应用前景。     

我国又一项物联网安全关键技术成为国际标准北大核心CSCD

我国自主研发的物联网安全协议关键技术(TRAIS)被国际标准化组织/国际电工委员会(ISO/IEC)发布成为国际标准。这是我国在物联网关键核心技术领域又一项拥有自主知识产权的国际标准。据介绍,该标准规范了有源射频识别(RFID)系统的空中接口安全防护方法,能够提供实体鉴别、安全通信等高等级安全服务,可有效防范针对RFID系统的身份伪造、数据窃听与篡改等安全威胁。     

基于RFID的食品安全监测追溯系统的设计

采用无线射频识别技术(Radio Frequency Identification,RFID)、无线数据通信技术(GPRS)、网络技术及数据库技术等,构建食品安全监测追溯系统。该系统可以对食品从生产养殖、出场、流通批发到零售环节等进行全过程跟踪、追溯,实现食品的安全监测管理。     

基于RFID的食品追溯优化模型设计

该文在研究RFID的工作原理与射频识别的基础上,进行了追溯系统的设计。在对食品的完整供应链的研究基础上,优化追溯的环节,提高模型的性能。希望通过本模型的设计,能有效提高食品安全追溯的效果。     

物联网你应该知道和所不知道的

RFID:物联网的最早应用 RFID(射频标签)目前已广泛应用于供应链,这是物联网的最早的应用.Gartner公司报告2009年RFI系统在全球供应链市场规模达到100亿美元.RFID已从第一代最基本功能、第二代RF旧(抗碰撞、可重写、外天线和识别功能)、第三代传感RFID(半无源、传感、监控、数据处理、通信、功率管理功能)到第四代主动RFID(有源设备、监控、传感器、数据处理、通信、功率管理、本地化功能>,还将发展到第五代交互RFID(智能设备、无源一有源、监控、传感器、数据处理、网络通信、功率管理、本地化一定位、与用户交互功能),此时,RFID与传感器的界限已很难区分.     

基于RFID食品安全追溯的系统

通过无线射频识别技术、无线数据通信技术、网络技术以及数据库技术等是在构建食品安全监测追溯系统采用的几种方法。这个系统全过程跟踪、追溯食品的生产养殖、出场、流通批发以及零售环节,从而使食品的安全监测管理得以实现。本文针对RFID食品安全追溯的系统进行相应的分析和研究。     

RFID手持设备追溯管理系统设计与实现

针对射频识别技术(RFID)在追溯方面具有工作场景复杂、标签识别效率和准确率高、同步数据并发量大、全生命周期溯源等特点,提出了基于高可靠性的数据通信协议和多标签防碰撞算法的安全追溯系统。该追溯系统以Win CE 5.0手持设备为平台,引入了RFID技术,进行产品全生命周期信息的可视化分析和用户交互式操作。实测结果验证了复杂环境下RFID全生命周期防伪追溯系统方案的可行性,表明了采用RFID技术的防伪追溯系统将成为行业发展方向。     

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。