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关键词： Tunnel diode oscillators  

摘要： Tunnel diodes have traditionally been researched for extending backscatter read-ranges for ultra-high-frequency (UHF) radio-frequency identification (RFID) tags as reflection amplifiers. This paper explores the natural harmonics that arise from biasing these diodes within their negative differential resistance regions and with no interrogating signal from a transmitting source, such as an RFID reader, to injection-lock these diodes. These harmonics are characterized for five tunnel diode boards, made with the same components and with each board’s fundamental frequencies measuring at above -15 dBm at a biasing voltage of 200 mV when measured over-the-cable. The occurrence of these harmonics creates unique harmonic signatures for each board and demonstrates possible harmonic RFID applications that can help RFID readers discover and even identify RFID tags with backscatter-less and memory-less IDs generated by tunnel diodes. © 2025, CC BY-NC-ND.

关键词： 物流管理   智能包装   RFID技术   汽车零配件  

摘要： 在汽车生产过程中需要使用大量的零配件,为了确保生产的连续性并优化库存,必须强化对零配件物流的管理。RFID技术是汽车零配件物流管理的主要技术之一,可以优化物流系统并提升对汽车零配件物流的管理水平。本文通过分析汽车生产物流的内涵,从建立RFID系统和使用RFID智能包装两种途径,探讨如何在汽车零配件物流中应用RFID技术,帮助相关人员更有效地使用RFID技术优化对汽车零配件物流的管理,提升汽车零配件物流的整体控制水平。

关键词： 3D   3 dimension   Ag   Silver   AI   Artificial Intelligence   APICS   American Production and Inventory Control Society   B. fragilis   Bacteroides fragilis   BCAAs   Branched-chain amino acids   C   2   H   4   Ethylene   CaOH   2   Calcium hydroxide   CAC   Codex Alimentarius commission   CMC   Carboxymethyl cellulose   CO   2   Carbondioxide   CRC   Colorectal cancer   DL   Deep learning   DNA   Deoxyribonucleic acid   EO’s   Essential oils   FAO   Food and agricultural organisation   Fe   Iron   Fe   2   O   3   Iron oxide   FIM   Foundation for Innovation in Medicine   FNB   Food and nutrition board   FTO   The Fat mass and obesity associated   GM   Genetically modified   GMO   Genetically modified organism   HbA1c   Haemoglobin A1c   HNT’s   Halloysite nanotubes   HPMC   Hydroxypropyl methyl cellulose   IBD   Inflammatory bowel disease   IBS   Irritable bowel syndrome   IoT   Internet of things   ISO   International Organisation for Standardisation   KMnO   4   Potassium permanganate   LED   Liquid emitting diode   MAP   Modified atmosphere packaging   MC   Methyl cellulose   ML   Machine learning   MMT   Montmorillonite   NaOH   Sodium hydroxide   PET   Polyethylene terephthalate   PH   Potential of hydrogen   PLA   Polylactic acid   PVA   Polyvinyl alcohol   PVOH   Polyvinyl alcohol hydrolysed   QR   Quick response   RFID   Radio Frequency Identification   RH   Relative humidity   TiO   2   Titanium oxide   TTI   Time temperature indicator   TVB-N   Total volatile basic nitrogen   ZnO   Zinc oxide   Smart food   Intelligent packaging   Food sustainability   Active packaging   Personalized nutrition  

摘要： The increasing demand for food safety, quality, and sustainability has driven the evolution of smart food and packaging technologies. Traditional packaging systems primarily serve passive roles, but modern innovations integrate active and intelligent functions to enhance food preservation, reduce waste, and improve consumer experience. Smart packaging solutions, including biosensors, time-temperature indicators, and antimicrobial films, provide real-time monitoring and extend product shelf life. Additionally, biodegradable and nanocomposite-based materials offer environmentally friendly alternatives to conventional plastics, aligning with global sustainability goals. The review explores the latest advancements in smart packaging, highlighting the role of Internet of Things (IoT), artificial intelligence (AI), and blockchain in strengthening food traceability and supply chain transparency. The integration of personalized nutrition within smart food systems is also discussed, offering tailored dietary solutions based on consumer health data. While these technologies present transformative potential, challenges such as consumer acceptance, scalability, and regulatory compliance must be addressed for widespread adoption. Future research should focus on optimizing sensor accuracy, improving the biodegradability of packaging materials, and enhancing cost-effectiveness to facilitate global implementation.

关键词： RFID技术   消防设备   全生命周期   维护管理   应用  

摘要： 传统消防设备管理方法主要依赖人工巡检和纸质记录,存在巡检效率低下、信息记录不准确或遗漏等缺点,导致设备管理和维护不便,影响消防安全。基于上述背景,研究了基于RFID(无线射频识别)技术的消防设备全生命周期维护管理方法。首先在消防设备上部署RFID标签,存储设备基本信息及巡检、维护保养记录。然后,建立RFID读写器网络。最后通过RFID手持终端进行快速巡检和精准定位,提高巡检效率并确保信息准确性。实例分析表明,应用RFID技术提升了消防设备管理效率,并且降低了维护成本。

关键词： 数据处理   物联网RFID技术   实际工程应用  

摘要： 本文探讨了物联网RFID技术在大跨径桥梁健康监测中的应用策略,涵盖传感器节点布设、数据处理、实际工程应用以及面临的挑战与应对措施等方面。通过优化技术手段和解决实际问题,旨在为大跨径桥梁的安全运营和维护提供更有效的监测方案,推动物联网RFID技术在桥梁工程领域的进一步发展。大跨径桥梁作为现代交通基础设施的关键组成部分,其建设规模不断扩大。然而,桥梁在长期服役过程中,受到车辆荷载、环境因素(如温度变化、湿度、风荷载等)以及材料老化等多种因素的影响,结构容易出现累积损伤,从而威胁桥梁的安全性和耐久性~([1])。传统的桥梁结构健康监测方法存在一定的局限性,如监测周期长、数据准确性有限等,而物联网RFID技术的出现则为桥梁结构健康监测提供了新的解决方案,具有实时监测、数据准确、自动化程度高等优势,能够有效提高桥梁结构健康监测的效率和可靠性,从而保证了桥梁的安全运营。

关键词： chipless RFID   bidirectional displacement sensors   highly sensitive structure   wireless detection system  

摘要： Structures such as bridges and buildings may suffer damage such as displacement and deformation during long-term use, especially at the joints of the structures. If not handled in time, it may cause irreversible damage to the structures. The current displacement sensor has the problem of single detection direction and low detection sensitivity. To solve the above problems, this paper proposes a chipless radio frequency identification bidirectional displacement sensor with a highly sensitive structural design. The sensor is mainly composed of four rectangular structures, and each two rectangular layouts are an axisymmetric structure for detection in one direction. When displacement occurs, the resonant frequencies of the two structures in the axisymmetric layout shift in opposite directions. The change value of the difference between the two resonant frequencies can effectively improve the sensitivity of displacement detection. Through experimental verification, the displacement detection sensitivity of the designed sensor in the longitudinal and lateral directions is 82.912 MHz mm-1 and 226.418 MHz mm-1, respectively, which has high sensitivity. The sensor is designed with FR-4 substrate, which has the advantage of low cost. In addition, in order to improve the long-term structural health monitoring capability of the sensor system, this paper uses a microcontroller, a nano vector network analyzer and a LoRa module to build a lightweight remote wireless displacement detection system, which can effectively monitor the displacement of a specific area.

关键词： RFID技术   医疗设备管理   远程系统   实时追踪  

摘要： 随着医疗行业的快速发展,医院对医疗设备的管理需求日益增加。提出了一种基于射频识别技术(RFID)的医疗设备远程管理系统设计方案,旨在通过RFID技术提高设备管理效率,降低人为错误,确保医疗设备的安全有效利用。系统利用RFID标签进行设备跟踪,并通过嵌入式通信模块实现远程数据传输。设计过程中考虑了RFID信号的覆盖范围、抗干扰能力以及与现有医院信息系统的兼容性问题。系统测试结果显示,其可以有效地实现医疗设备的实时追踪和维护保养记录,并大幅提升设备使用效率,减少资源浪费。

关键词： 矿用单体液压支柱   数字身份识别   双模式无线通信   无线射频识别   RFID   PCB超高频抗金属标签  

摘要： 传统矿用单体液压支柱的管理维护模式效率低、追溯困难、安全性低,但在煤矿井下环境中,基于无线射频识别(RFID)的矿用单体液压支柱管理系统易受金属干扰而影响识别效果,且数据通信高度依赖单一网络,难以保障通信的稳定性与实时性。针对上述问题,设计了一种基于双模式无线通信的RFID矿用单体液压支柱数字身份管理系统,并采用PCB超高频抗金属标签降低金属环境对RFID的干扰。通过RFID手持阅读器APP一键上传功能,将液压支柱状态数据无线发送至服务器端的管理软件,实现对液压支柱全生命周期的监控和管理。为适应井下复杂的无线环境,提出了双模式无线通信方式,通过公共WiFi和AP热点的智能切换,有效解决了井下网络覆盖不足的难题,保证了数据传输的可靠性。引入了基于信息熵理论的动态数据价值评估模型,实现了基于数据价值的动态分级传输策略。测试结果表明:PCB超高频抗金属标签在无障碍条件下的有效识别距离为2.2 m,识别稳定性达98%;在WiFi模式下,系统有效数据传输距离为5.2 m,且传输成功率在90%以上。

关键词： 区块链   RFID技术   高校实验室   资产管理  

摘要： 随着信息技术的快速发展,高校实验室作为科研创新的重要基地,正迫切需要进行数字化与智能化转型。基于区块链和RFID技术,设计了一套高校实验室资产管理系统,旨在有效提升实验室管理人员的工作效率与高校实验室的智能化管理水平,为解决实验室资产管理中的信息化管理水平不足、监管力度薄弱、数据安全性和可靠性亟待提升等问题提供了有力的技术支持和实践参考。

关键词： 电子核对系统   错配   射频识别技术   电磁辐射  

摘要： 目的:探讨电子核对系统(electronic witness system,EWS)在人类辅助生殖技术(assisted reproductive technology,ART)中应用的安全性。方法:回顾性分析2017年1月至2023年6月在本院生殖医学中心接受治疗的促排卵周期,将人工核对样品的2696例周期设为对照组,将EWS核对样品的3096例周期设为EWS组,比较分析两组的受精情况、胚胎发育情况、胚胎移植情况及出生子代情况。结果:EWS组的着床率高于对照组(P<0.05),其它数据两组间无统计学差异(P>0.05)。结论:电子核对系统的应用不影响人类配子及胚胎,对试管婴儿的治疗无不良影响,是相对安全的。