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关键词： Book reviews   Radiofrequency identification   Standards   Backscatter   Antennas   Research and development   Wireless power transmission   UHF technology   Software radio   Radio communication   Internet of Things  

摘要： Presents reviews for the following list of books, Radio Frequency Identification Engineering: How to Engineer an RFID Reader.

关键词： Wireless communication   Antenna measurements   Shape   Libraries   Multimedia communication   Antennas   Radiofrequency identification  

摘要： RFID system is one of the key technology to bring efficiency to library services such as the automatic rental of book and return. In this paper, we evaluate the performance of table type RFID reader. Furthermore, when RFID reader is on the metallic plate (which affected the performance of RFID), we investigate the relation between the reading rate and the distance between metallic plate and RFID reader. From the experiments, it is clearly shown that communication area decreases and becomes near the center of reader's antenna as the distance between the tag and the reader increases. The influence of the metallic plate to the reader depends on the gap between the metallic plate and the reader.

关键词： 微波氨气传感器   频率漂移   温湿度频率补偿   射频识别  

摘要： 畜禽养殖、农产品品质检测以及工业环境等重点行业对有害气体的高精度检测提出了迫切需求。然而,室内环境中温湿度的波动会导致气体传感器出现频率漂移现象,进而影响气体检测精度。针对此类问题,通过电磁仿真分析微带谐振器电磁损耗特性,确定气敏材料最佳涂覆位置,进而提升微波传感器对氨气响应灵敏度,进一步分析微波传感器辐射增益与氨气浓度之间的相关性,结合无线功率传输模型,构建了无线氨气检测系统。基于射频识别检测原理,搭建氨气测试系统,开展了不同温湿度条件下传感器测试实验,分析了传感器输出性能。引入反向传输神经网络温湿度补偿算法,并结合皮尔森相关性分析,对不同温湿度条件下传感器的频率漂移进行分析与补偿校正。试验结果表明,温湿度波动对微波氨气传感器频率漂移具有显著影响,补偿后频率漂移幅度减少了14 MHz,误差浓度低至6×10-8,相对误差仅为2%,气体检测精度提升了31.11%。相较于基于反向传输神经网络温度补偿模型和支持向量机温湿度补偿模型,具有更好的补偿效果。综上所述,该研究有效提升了微波氨气传感器在复杂温湿度环境中的检测精度,为高精度有害气体检测提供了更有效的测量支撑。

关键词： RFID   Blockchain technology   B2B Steel industry circular supply chain management  

摘要： Circular supply chain management is expected to shift the steel sector from a conventional economic paradigm to a more fruitful circular economy. Furthermore, tracing reusable and recyclable metals across the steel industry’s supply chain necessitates multi-stakeholders’ involvement. Radio frequency identification (RFID) may assist in the governance of the complexity of circular steel supply chain management (CSSCM), strengthening the steel industry’s transparency as well as efficiency. The following research develops a decentralized and service-oriented RFID-enabled blockchain-integrated conceptual framework that incorporates a circular steel supply chain strategy for the B2B steel sector to achieve this goal. Industrial methods, inventory management, and resource utilization are examined in this study. The findings show that RFID-enabled blockchain technology enhanced firm’s capacity to share real-time knowledge with CSSCM stake-holders and aid organizations in the B2B steel sector in understanding the aspects that influence the steel sector’s overall performance. Management must need to understand the value of associated technologies to deliver CSSCM and make choices faster. The implications of adopting RFID-enabled blockchain technology to serve the circular economy are discussed from theoretical, practical, and social perspectives.

关键词： Radiofrequency identification   Sensors   Millimeter wave communication   Backscatter   Passive RFID tags   Next generation networking   Machine learning   Lenses   Humidity   Harmonic analysis  

摘要： Millimeter-wave Identification (mmID) is a key enabler for next-generation Internet of Things (IoT) applications. This paper provides a comprehensive review of recent advancements which have improved localization, sensing, and communication through increased read ranges and angular coverages, reduced power consumption, and improved localization accuracies. These advancements are achieved through innovative designs integrating retrodirective arrays, planar and three-dimensional lenses, energy-autonomous solutions, and machine learning techniques. Trade-offs between the different types of mmID tags are discussed and ways of mitigating these challenges are addressed. Additionally, the paper highlights key applications, including wireless sensing, motion tracking for VR/AR applications, structural health monitoring, and high-data-rate backscatter communication. Current limitations and future directions are discussed highlighting the role of machine learning, energy harvesting, and reconfigurable intelligent surfaces (RIS) in advancing next-generation mmID networks. By addressing these factors, this review provides insights into the continued development of mmID technology for widespread adoption in advanced IoT and wireless communication systems.

关键词： Training   Reviews   Prototypes   User interfaces   Probability   Software   Assisted living   Reliability   Usability   Radiofrequency identification  

摘要： Technology assisted living is a practical solution to the increasing demands for access to healthcare services in an era of aging populations and dwindling supply of professional healthcare workers. Radio Frequency Identification (RFID) technology with complementary sensors is widely considered as a very promising approach to realizing the vision of technology assisted living. At the core of any assisted living systems is the important function of human activity inference, which is what enables such systems to be intelligently perceptive and responsive to the humans under their care. In this paper, we review the current state-of-the-art in activity inference for RFID-based assisted living applications, and present our ongoing work on an assisted living prototype for ‘goal training’ or brain rehabilitation of patients with cognitive impairment in their home environments, with a discussion on the potential design issues involved.

关键词： RFID 无源技术   高压开关柜   温度监测   电力设备   智能化监测  

摘要： 高压开关柜作为电力系统核心设备,其运转温度对电力系统稳定性与安全性影响重大。本文借由RFID无源技术,展开高压开关柜温度监测设计探究。通过剖析RFID无源技术原理以及在温度监测范畴的应用长处,阐述监测系统硬件架构与软件设计详情。硬件上,打造温度采集模块、RFID标签及读写器;软件里,搭建数据处理和传输算法。该监测系统能够实时、精确监测高压开关柜温度,及时察觉潜在故障风险,为电力系统安全平稳运行给予技术保障,助力电力设备智能化监测发展。

关键词： 物联网   射频识别   智能停车场   数据库系统  

摘要： 在物联网的支持下,智慧停车系统正在逐渐改变传统的停车场运作方式,提高停车场的利用率。本研究采用物联网的射频识别技术、计算机局域网络技术、语音提示技术、短程微波通信技术、图像数字处理技术以及自动化控制等技术,实时采集数据并进行管理,精确地显现车位闲置情况,迅速查找车位。同时,该系统还可以有效地减少人为的介入,从而提高停车效率,节约运行费用。此外,本研究从停车效率、运营效率以及停车场成本等方面深入分析基于物联网的智能停车解决方案对停车场利用率的影响。通过智慧停车场的推行,旨在提高停车场的收益,缓解城市的交通拥挤,提高城市的运行效率。