Deployment strategy for static chargers in WRSN

The traditional deployment strategy of static chargers in wireless rechargeable sensor networks (WRSN) covers all the area.The basic idea is to cover all the positions of nodes.A mathematical model of distance between a charger and the farthest node was established,the relationship between the number of nodes and the mathematical expectation of minimum radius of charging was analyzed,and deployment strategy for static chargers was proposed.The method based on the locations of all nodes that need to be charged in the area,used the smallest enclosing circle (SEC) algorithm and finds the optimal location of the charger through Euclidean delivery boy algorithm.It will decrease charging radius,reduce the minimum required transmitted power,thereby saving the average charging energy consumption.The experimental results demonstrated that the less the number locations that the nodes existed,the more energy will be saved.     

基于物联网技术的交通信息采集和服务

通过分析我国智能交通系统建设现状和存在问题,结合目前道路交通管理信息采集与服务需求,设计了基于物联网技术的道路交通信息采集与服务框架,以公安交通指挥平台为核心,集成各类交通信息采集与服务系统,实现交通路况信息全天候采集和智能分析、交通信息服务和出行诱导,以及区域交通流协调组织等功能。基于该框架体系,分别从交通流信息采集、交通信息发布与诱导服务、交通信号协调控制、公交优先等方面,对比分析了基于ITS技术的传统应用与基于物联网技术的新型应用的优缺点。结论:物联网技术应用将有利于突破现有ITS应用模式的弊端,提高交通信息采集精度,提升公众出行服务水平。     

RFID behavior study in enclosed marine container for real time temperature tracking

The performance of radio waves in open environments has been studied for years. In contrast, the behavior of Radio Frequency Identification (RFID) inside metal enclosed areas is not yet understood. This research project focuses on the 3-D mapping of RFID signal strength inside a 12 m refrigerated marine container instrumented with three different types of radio frequency (RF) emitters: 915 MHz reader; 2.45 GHz reader and 433 MHz RF transmitter. The main goal is to find a frequency/configuration that would allow real time reading of the temperature in a shipment of perishable products using RFID. Only one frequency and one antenna were used at a time. The RF transmitter antenna was mounted at two different places inside the container; at the top of the front wall (facing back) and on the ceiling in the middle of the container (facing down). The signal strength was acquired by a spectrum analyzer and its antenna was mounted on a small electric cart inside the container. The cart was programmed to move along the length of the container and stop repeatedly, allowing three automated measures per position. All data were analyzed in terms of power level and attenuation. The maps showed that the RFID antenna positioned at the front of the container delivered slightly better results than the one in the middle of the ceiling. The results showed a significantly higher performance at the 433 MHz level. This article was presented at Food Processing Automation Conference, American Society of Agricultural and Biological Engineering (ASABE), Providence, RI, June 28–29 2008.     

NXP：加强专注领域领导地位

NXP（恩智浦半导体）通过对公司业务的整合，确立未来发展的4大领域：家庭娱乐、汽车电子、智能识别和多重市场半导体。并通过产品线管理、合并与并购大大提升了NXP在关键的专注领域的领导地位。2006年，NXP在专注领域处于第一和第二位的比例为63％，通过并购科胜讯机顶盒业务和成立ST—NXP合资公司等项目，2008年这一比例已上升为77％。     

RFID在煤矿安全生产中的应用研究

分析了煤矿现有安全技术存在的问题,提出用RFID技术解决煤矿安全生产中的瓦斯浓度监测及井下作业人员的定位问题,达到预防重大安全事故的发生和保证煤矿的安全生产。     

RFID技术在天津港的应用

天津港原有陆运收箱流程,在两个方面影响到效率的提高;不仅影响到车辆的通过速度而且影响收箱效率,并增加装船作业时的倒箱频次,进而影响到装船的作业效率。因此,天津港开始通过RFID的技术应用进行集装箱路运流程改造,在测试过程中,提出了几方面改进方案:业务、技术等。采用RFID和EDI传输相结合的方案,利用RFID技术的特点使运输车辆大大加快进出门的速度。     

On a new formal proof model for RFID location privacy

We discuss a recently proposed formal proof model for RFID location privacy. We show that protocols which intuitively and in several other models are considered not to be location private, are provably location private in this model. Conversely, we also show that protocols which obviously are location private, are not considered location private in this model.Specifically, we prove a protocol in which every tag transmits the same constant message to not be location private in the proposed model. Then we prove a protocol in which a tag's identity is transmitted in clear text to be weakly location private in the model.     

Framed slotted ALOHA with grouping tactic and binary selection for anti-collision in RFID systems

9%-16.3% compared to other ALOHA-based tag anti-collision algorithms when the number of tags is 1 000.     

中国高校博物馆数字化建设新模式的研究

对中国高校博物馆数字化建设现状进行概括介绍,并结合高校博物馆馆藏分散特点、学科建设互动、社会开放形式、师资科研能力、保管、展示和服务等特点分析。提出基于群馆模式的资源智能聚合、构建学科互相式数字通识教育基地、基于互联网、新媒体的社会开放运营、数字化保管、展示和服务等几种数字化建设新模式,以进一步提升高校博物馆的社会功能,同时也可推广至社会博物馆使用。     

Vulnerabilities in Chen and Deng's RFID mutual authentication and privacy protection protocol

As incorporation of RFID (Radio Frequency IDentification) tags in a wide variety of applications increase, there is a need to ensure the security and privacy of the entity to which these tags are attached. Not surprisingly, this is a very active area as attested by the large number of related published research literature. Recently, the journal engineering applications of artificial intelligence published a paper by Chen and Deng (2009) where the authors propose a mutual authentication protocol for RFID. This protocol has fundamental flaws that can be readily taken advantage by a resourceful adversary. We identify and discuss these vulnerabilities and point out the characteristics of this protocol that exposes it to these vulnerabilities.