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关键词： Radio frequency identification (RFID)  

摘要： This paper presents a new method to tackle the security issues of chipless tag systems in Internet of Things (IoT) applications. The strategy aims to prevent the cloning of tags by utilizing the intrinsic natural randomness in the manufacturing process. This research presents a novel approach to generate fingerprints for chipless Radio Frequency Identification (RFID) tags using the unique backscattered electromagnetic (EM) responses, caused by inherent natural variations in resonator geometry, captured by a portable Multiple Input Multiple Output (MIMO) reader. Using seven tags, one authentic and six counterfeits, two separate sets of fingerprints were generated using both Frequency Domain (FD) and Time Domain (TD) data, respectively, effectively creating a dual-layer authentication system that distinguishes authentic tags from fakes with 100% accuracy. This was achieved by utilising similarity metrics such as Mean Squared Error (MSE) and Structural Similarity Index (SSI), offering a robust alternative to traditional tag authentication methods. The portability and affordability of the MIMO reader, combined with new opportunities for image-based identification, position this approach as a substantial advancement in the realm of authenticity verification for chipless RFID tags in the realm of IoT. © 2024, The Authors. All rights reserved.

关键词： Health care   Engineering   Mathematics and computing  

摘要： Current approaches to activity-assisted living (AAL) are complex, expensive, and intrusive, which reduces their practicality and end user acceptance. However, emerging technologies such as artificial intelligence and wireless communications offer new opportunities to enhance AAL systems. These improvements could potentially lower healthcare costs and reduce hospitalisations by enabling more effective identification, monitoring, and localisation of hazardous activities, ensuring rapid response to emergencies. In response to these challenges, this paper introduces the TransparentRFIDTag Wall (TRT-Wall), a novel system taht utilises a passive ultra-high frequency (UHF) radio-frequency identification (RFID) tag array combined with deep learning for contactless human activity monitoring. The TRT-Wall is tested on five distinct activities: sitting, standing, walking (in both directions), and no-activity. Experimental results demonstrate that the TRT-Wall distinguishes these activities with an impressive average accuracy of 95.6% under four distinct distances (2, 2.5, 3.5 and 4.5 m) by capturing the RSSI and phase information. This suggests that our proposed contactless AAL system possesses significant potential to enhance elderly patient-assisted living.

关键词： Low power consumption   pattern reconfiguration   radio frequency identification (RFID)   smart antenna   wireless control   Yagi-Uda antenna  

摘要： In recent years, the radio frequency identification (RFID) technology has been applied in various fields, including warehouse management, smart transportation, passive sensors, and position tracking. This article presents a novel application of the RFID technology in the field of smart antennas, specifically for the wireless control of the pattern and working frequency of the Yagi-Uda antenna through the ultra high frequency (UHF)-RFID protocol. By leveraging the RFID technology, our innovative approach controls the passive resonator's length, enabling it to function as a director or reflector. This solution effectively addresses the challenges of pattern instability caused by the metal control cables, which are commonly associated with the conventional reconfigurable antennas. The proposed antenna operates at 2.49 GHz in directional mode and at 2.45 and 2.51 GHz in bidirectional mode. In the directional mode, the measured gain is approximately 7.5 dBi, exhibiting a remarkable front-back ratio of 11 dB. Furthermore, the entire system demonstrates excellent energy efficiency, with a mere power consumption of 12 mu W and the wireless control range reaches up to 33 m.

摘要： Printable RFID, also aufgedruckte, digital per Radio Frequency Identification auslesbare Etiketten, haben das Potenzial, Bar- und QR-Codes abzulösen. Mit ihrer Einführung entstehen Datenschutzprobleme, wenn diese Etiketten auf Produkte gelangen, die mit natürlichen Personen über Hintergrundsysteme in Verbindung gebracht werden können.

摘要： Wie kann die Sicherheit von Arzneimitteln noch gesteigert werden? Tracing, tracking, and packaging in der biopharmazeutischen Produktion ist ein Lösungsweg. Mit Hilfe von RFID-Sendern wird die individuelle Nachverfolgbarkeit einer jeden Spritze während des gesamten Produktionsprozesses gewährleistet.

关键词： 时分多址   预约   防碰撞   认证协议  

摘要： 为解决RFID领域中多标签识别存在的信息泄露和信息碰撞问题,提出了一种基于预约机制的防碰撞安全认证协议(reservation mechanism for authentication protocol,RMAP)。RMAP可有效抵御窃听、重放、欺骗等攻击,且采用精简杂凑运算次数的方法,有效地简化了计算量。同时,采用载波监听多点接入技术,通过重传随机数进行帧序号的二次预约和重排,实现标签的无碰撞有序通信和识别效率的最优,解决了现有协议为避免信息碰撞而对标签进行循环性识别导致的识别效率低、读取时间长的问题。对RMAP识别效率的数值分析表明,当待识别标签数量少于1024时,RMAP的最低识别效率为95.15%,高于常用防碰撞协议。

关键词： 石墨烯膜   RFID技术   实验室危化品管理  

摘要： 本文深入分析了将石墨烯膜材料与射频识别(Radio Frequency Identification,RFID)技术 相结合,在实验室危化品管理方面的应用潜力。尽管 RFID 技术在提高实验室设备管理的效率、减少人 为错误以及实现数据自动化方面展现出了其独特的优势,但目前基于传统金属材质的 RFID 标签在实际 应用中仍面临若干挑战。本文基于石墨烯膜材料优异的导电性、机械性能和环境耐受性等性能,详细介 绍石墨烯膜 RFID 标签制作的流程,并论证了石墨烯膜 RFID 标签在特殊环境中长期识别的潜力。本方 案致力于推动科研工作向更高效方向发展,并加速科研成果的市场化转化,同时,为石墨烯膜在产业化 道路上开辟了新的路径。

关键词： 智能图书管理系统   图书馆   管理系统智能化   RFID技术   用户管理  

摘要： 新时期下,社会公众对于文化知识的获取需求不断提升,同时也对知识获取的形式、便捷性乃至知识质量提出了更高的要求,这为图书馆的经营管理、发展带来巨大挑战与机遇。文章以M图书馆智能图书管理系统功能分析为例,从引入智能化用户管理功能、智能化图书管理与借阅功能、网络平台服务功能三个方面探讨了图书馆管理系统智能化的实现路径,供我国图书馆等相关文化组织机构借鉴参考。