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关键词： Radiofrequency identification   Harmonic analysis   Wireless fidelity   Power harmonic filters   Sensors   Interference   Throughput   Filtering   Correlation   Vibration measurement  

摘要： In the realm of the Internet of things (IoT), radio frequency identification (RFID) technology is essential for linking physical objects to digital data. The introduction of harmonic technology has expanded RFID's applications by improving sensitivity and enabling communication with wireless fidelity (Wi-Fi) networks. However, this trend faces challenges, notably interference from strong Wi-Fi signals, which impacts RFID-based sensing systems. This paper proposes the WiFID (Wi-Fi and RFID) algorithm, which enables Wi-Fi devices to sense weak RFID harmonic signals. Adaptive subcarrier deallocation minimally reduces Wi-Fi throughput while effectively limiting interference with RFID harmonic sensing. Experimental validation on the universal software radio peripheral (USRP) platform demonstrates that WiFID successfully detects 90% of RFID harmonics at −30 dBm, with only a minimal 4% decrease in Wi-Fi throughput.

关键词： IoT and Adafruit   io   students attendance   tracking and monitoring  

摘要： In the present occupied world, time is an indispensable issue which cannot be overseen by seeing every single wonder with our tight schedule. So, now daily's automatic projects are being favored over manual systematic works to make life easier and simpler in all angles. To make it a great achievement Internet of Things is the most recent web innovation created. IoT has major role in creating many advancements in today's world. In many of the educational institute or business service center, it is essential to maintain a proper attendance records. This research focuses on replacing the manual attendance recording system into an automated one and also maintaining the attendance records, i.e., percentage of attendance with higher accuracy. The proposed methodology in this undertaking is the improvement of internet of things-based RFID attendance system. Currently, RFID technology has been widely used in various fields such as agriculture, transportation, sales and in many other sectors. Apart from these sectors, this technology can also be utilized for automating attendance taking system in educational sectors too. The normal method of taking attendance manually is usually a time consuming one and also there is a probability of error. This manual method may also lead to misconducting and also there is wastage of valuable time. In order to overcome this problem, the present manual attendance taking system can be replaced by a smart attendance system by implementing RFID technology. This research pretends much useful for the staff members and making the attendance taking process in an easiest and efficient way.

关键词： RFID technology   Transformer models   Privacy preservation   Facial recognition   Biometric systems  

摘要： Purpose - This paper aims to present a novel approach to facial recognition that enhances privacy by using radio frequency identification (RFID) technology combined with transformer models, eliminating the need for visual data and thus reducing privacy risks associated with traditional image-based systems. Design/methodology/approach - The proposed RFID-transformer recognition system (RTRS) uses RFID technology to capture signal features such as phase and received signal strength indicator, which are then processed by a transformer model. The model is specifically designed to handle structured RFID data, capturing subtle patterns and dependencies to achieve accurate biometric recognition. The system's performance was validated through comprehensive experiments involving different environmental conditions and user scenarios. Findings - The experimental results demonstrate that the RTRS system achieves a recognition accuracy of 98.91%, maintaining robust performance across various challenging conditions, including low-light environments and changes in face orientation. In addition, the system provides a high level of privacy preservation by avoiding the collection and storage of visual data. Originality/value - To the best of the authors' knowledge, this work introduces the first RFID-based facial recognition system that fully leverages transformer models, offering a privacy-preserving alternative to traditional image-based methods. The system's ability to perform accurately in diverse scenarios while ensuring user privacy makes it a significant advancement in biometric technology.

关键词： 射频识别   无线传感网络   医疗设备   可视化追溯  

摘要： 进行医疗设备可视化追溯时,由于无法实时捕获和记录设备信息,影响追溯效果。对此,提出基于射频识别(RFID)与无线传感网络的医疗设备可视化追溯方法。通过RFID获取医疗设备身份信息,利用DBSCAN聚类算法计算相似度最高聚类结果,得到医疗设备的区域信息,采用无线传感网络实现设备区域信息的传输,计算医疗设备轨迹的卡尔曼滤波器系数,与最新位置信息进行比较获得相关概率值,以达到可视化追溯医疗设备的目的。实验结果表明,所提方法的医疗设备识别精度最高时达到98%,可视化追溯概率始终高于90%,追溯能耗小于1.60 J,具有实用性。

关键词： 课程思政   新工科   课程改革   RFID技术   物联网工程  

摘要： 党的二十大报告给高校教育工作者提出新的历史使命,如何紧紧抓住新工科专业中关键的专业核心课程,在教学环节中全面贯彻党的教育方针、润物无声地落实立德树人根本任务,对于课程思政建设至关重要。RFID技术是新工科特色物联网工程专业的一门重要基础必修课程,这类课程思政的建设更具有典型性和示范作用。该文在分析新工科课程思政教学理念和教学方法的基础上,以物联网工程专业核心课程为例,给出课程思政建设的实践探索。通过近几年教学实践,有效提高学生的专业能力、职业素养,激发学生的专业认同感和家国情怀。

关键词： 灰色市场   供应链   信息追溯   RFID   区块链   定价策略  

摘要： 考虑由一个品牌制造商和一个参与灰市投机的零售商组成的灰市供应链,探究制造商引入灰市产品信息追溯技术对灰市供应链决策和运作的影响。首先,以无追溯技术作为基准模型,发现消费者购买高价产品的概率及消费者对灰市产品的偏好系数均会直接或间接影响三类产品的销售状况,进而影响制造商和零售商的利润;提升消费者购买到高价产品的概率具有双重作用,该概率的提升一方面能够抑制灰市扩张,另一方面也可能为制造商带来额外收益并提升灰市供应链运作效率。随后,考虑制造商采用追溯技术追溯产品渠道来源,依次引入RFID技术和区块链技术,发现不同信息追溯技术的引入会对授权渠道产品的价格和需求产生显著的影响。同时,采取信息追溯可有效抑制灰市扩张,但不同技术的抑制作用存在差异;零售商总是受益于区块链技术的引入,这源于其无需支出任何成本导致的“搭便车”现象,但制造商的损益状况还与区块链的固定成本密切相关;在两种追溯技术成本支出相等的情形下,较之RFID技术,制造商采用区块链技术可获得更高的利润。

关键词： 冷链物流   RFID技术   平台规划   对策建议  

摘要： 随着科学技术的发展,物流大数据的应用将会使农产品冷链物流的发展进入新的阶段。若构建出一个基于大数据技术的农产品冷链物流智慧平台则会大大减少现阶段农产品从生产到消费过程中所面临的各种问题,进而实现农户与消费者之间的互利共赢。本文将通过分析我国冷链物流目前发展现状及存在问题,并以SWOT分析法优化智慧平台,为此类新型农产品冷链物流智慧平台的后期发展提供发展对策及建议。

关键词： RFID标签   橡胶层   玻璃纤维树脂   气密层   密闭空间   轮胎   环氧树脂  

摘要： 由中策橡胶集团股份有限公司和杭州海潮橡胶有限公司申请的专利(公布号CN117944402A,公布日期2024-04-30)“一种含RFID标签的轮胎”,涉及的轮胎气密层内表面上设置有RFID标签,RFID标签外侧设置胶片,胶片与气密层紧贴并硫化交联形成密闭空间以包裹住RFID标签。RFID标签具有5层结构,从上往下分别为第一橡胶层、玻璃纤维树脂层、RFID电路层、环氧树脂层和第二橡胶层,第一橡胶层与气密层紧贴并硫化交联在一起,第二橡胶层与胶片紧贴并硫化交联在一起。

关键词： 射频识别   互耦效应   互阻抗   多标签RFID系统   线性阵列分布  

摘要： 标签间互耦效应对不同位置标签的作用效果不同,使得线性阵列分布RFID系统的整体性能随标签间距与数量的改变呈现非线性变化。鉴于此,基于RFID工作原理与电磁波传播理论,推导了多标签RFID系统中标签互阻抗及功率传输系数的表达式;利用功率传输系数,分析了标签线性等距分布情形下,互耦效应对不同位置标签及系统整体性能的影响,并建立了系统最小功率传输系数随标签间距与标签数量变化的数学模型;在开阔室内环境中,测试了标签间距和数量变化时的应答信号功率。理论分析与实验结果表明,线性等距分布时,标签的功率传输系数与间距呈非线性关系;互耦效应对标签的影响程度以工作波长为周期逐步减小,在间距为波长倍数时取得极大值;最小功率传输系数出现的位置随着间距的增大在中心与外侧之间以波长为周期波动;系统性能测试结果与所建立模型的变化规律保持一致。

关键词： 物联网技术   电力智能运检   感知技术   RFID  

摘要： 阐述物联网技术在电力智能运检中的应用,介绍感知技术、RFID技术、网络技术及平台技术的应用,并分析物联网与电力运检在技术、管理和系统集成方面的融合创新,提升运检效率与智能化水平.