教学课程资源库 更多>>

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。

关键词： 物联网技术   电力工程   RFID技术   5G   大数据技术  

摘要： 为推动电力工程的高质量发展,相关人员可引入物联网技术,充分发挥好大数据技术、第五代移动通信技术(5th generation mobile communication technology,5G)等前沿技术的作用,为人们提供高质量的供电服务。文章主要探讨了电力工程建设阶段应用的物联网技术,包括射频识别(radio frequency identification,RFID)技术、5G和大数据技术,并进一步深入分析了物联网技术在电力工程建设中的实际应用,以期为电力工程的发展提供参考。

关键词： 螺栓松动   标签天线   弯折偶极子   回波损耗  

摘要： 为解决水电机组螺栓松动难以识别的问题,实现螺栓松动异常检测,设计了一款新颖的正六边形弯折偶极子RFID电子标签天线。天线以FR4(环氧树脂)材料为基板,采用中心馈电方式。通过HFSS软件,首先分析了弯折偶极子天线的弯折数和矩形弯折的高度参数对天线性能的影响,然后对天线结构中的各个参数进行仿真优化,从而确定天线各个参数的最终取值,使标签天线达到了目标中心谐振频率,并与目标芯片实现了阻抗匹配。标签天线结构参数经仿真优化,最终设计尺寸为70mm×70mm×1.6mm。结果表明其中心工作频率为915MHz,回波损耗S为-47.2dB,带宽为130MHz,辐射性能良好,在螺栓松动检测方面具备一定的应用价值。

关键词： Protocols   Security   Authentication   Supply chain management   Supply chains   Servers   Resists   RFID tags   Internet of Things   Impersonation attacks   authentication protocol   impersonation attack   mutual authentication  

摘要： In the evolving landscape of supply chain management, the integration of radio-frequency identification (RFID) technology has marked a significant milestone. This development has led to the emergence of a new system in RFID-based supply chain management, which is intricately linked with the advances in the Internet of Things (IoT). RFID technology employs electromagnetic fields to identify and track tags on objects and revolutionizes the management and tracking of items in the supply chain. However, the public communication among RFID tags, RFID readers, and supply chain infrastructure predominantly escalates security and privacy challenges. Several authentication protocols have been proposed to overcome these challenges. However, the vulnerability of most proposed protocols to numerous security attacks renders them inefficient. Therefore, to address these crucial challenges, we devised an RFID-based authentication protocol for supply chain management systems. The incorporation of a physically unclonable function (PUF) into the protocol fortifies the system against physical tampering attacks. To validate the security and effectiveness of the devised protocol, both informal and formal security analysis are conducted. The formal security analysis is conducted using the widely used random oracle model. The informal security analysis reveals that the devised protocol provides enhanced and efficient security features. Furthermore, we perform a comparative analysis with related protocols, focusing on critical performance metrics like communication cost, computation cost, and overall security features. The results of the comparative analysis are promising, indicating a substantial 30.92% reduction in computational cost and a 23.98% reduction in communication cost in comparison to related protocols, thus highlighting the protocol's superior performance and resource efficiency.

关键词： 工业物联网   无线传感器网络   入侵检测   射频识别   机器学习  

摘要： 随着工业物联网技术广泛应用,其安全问题日益凸显。文章调研国内外研究成果,综述工业物联网的安全威胁。首先定义工业物联网并阐述其在工业生产中的重要性。其次,详细分析其三层架构(感知层、网络层、应用层)的特点及威胁:感知层面临射频识别标签被破坏、无线传感器网络通信被干扰等风险;网络层因通信协议效率低、安全性不足,易出现身份认证漏洞和数据通信隐患;应用层需应对MQTT和CoAP协议的漏洞,如身份验证缺失、授权不当、加密不足等。最后,文章总结各层安全威胁的多样性和复杂性,呼吁采取综合性安全策略,包括机器学习、提升安全协议、强化身份验证和加密措施,发展先进威胁检测技术,保障工业物联网健康发展。

关键词： Deep learning   Transformer   Data imputation   Indoor positioning   RFID  

摘要： Radio Frequency Identification (RFID) technology has recently attracted widespread attention in the indoor positioning task. Traditional indoor positioning methods typically collect target state information at multiple time points, organize it into a time series format, and then address the positioning task as a regression problem to estimate the target's location. However, these methods require multiple RFID readers for data collection, which significantly increases the overall cost of the positioning system. Furthermore, these methods often overlook the inherent dynamics within time series data, leading to a waste of valuable temporal information and suboptimal positioning accuracy. To address the challenges of high cost and low accuracy, in this paper, we propose a novel RFID indoor positioning system based on a Double-order Transformer model. Specifically, our approach leverages a single mobile RFID reader to lower data collection costs, and we design the GAIN network to mitigate data loss. By integrating first-order differentiation information, our model captures the temporal dynamics of the signal more effectively, allowing for a better understanding of signal variations over time. The Double-order Transformer processes both the original time-series data and the first-order differentiation data in parallel, enhancing the model's ability to extract meaningful spatial-temporal features. Experimental results demonstrate the superiority of our proposed model, notably enhancing localization accuracy and outperforming state-of-the-art benchmark methods across multiple metrics.

关键词： 计算机技术   固定资产管理   RFID   二维码   全生命周期管理  

摘要： 文章分析了传统固定资产(家具)计量管理的痛点,阐述了计算机技术在提升管理效率、确保账实相符、优化资源配置等方面的应用优势,并通过典型案例展示了技术赋能的实践成果。研究指出,数据库技术、自动识别技术、数据分析与报告生成等计算机技术的集成应用,已成为推动固定资产管理数字化转型的核心动力。未来,随着物联网、人工智能等前沿技术的深度融合,固定资产管理将进一步向智能化、精细化方向演进。

关键词： 射频识别技术   轮胎硫化   I2C总线  

摘要： 在轮胎生产过程中硫化是极为重要的工序,轮胎在成形后需置入金属模具并通过加热、加压以及一系列固化程序形成结构完整的轮胎。橡胶作为轮胎的主要原料,其性能测试在轮胎的研制和生产过程中尤为重要。本研究利用超高频射频识别技术开发轮胎硫化温度监测系统,该系统由读取器和测温模块组成。温度检测模块采用I2C总线技术,实现对硫化过程中温度的实时测量并将测量数据存储于芯片中便于后续数据的读取和分析,该系统无需开孔测试硫化模具,有效弥补了传统有限测量方法的不足。

关键词： 导电银浆   水性溶剂   银粉   射频识别   柔性电子  

摘要： 导电银浆主要由银粉、溶剂、树脂和添加剂组成,按溶剂性质可分为水性和油性导电银浆,而前者因绿色环保的特点使其在柔性电子技术领域具有极高的应用潜力。使用控制变量法对比实验,发现溶剂配比及种类不仅能提高银浆的导电性同时影响其干燥速率和烧结温度,其中丙三醇能显著提高银浆导电性、乙醇会提高银浆自然干燥速率;最终确定导电银浆配比为n(银粉)∶n(树脂)∶n(溶剂)=125∶55∶53,水性溶剂的配比为n(乙醇)∶n(丙三醇)=161∶339,该银浆具有高导电性(ρ=2.25×10^(-5)Ω·cm)、粘附性(5B)、优良的综合性及绿色环保等特性,同时可实现RFID的应用。

关键词： 模糊PID控制   RFID定位   巡检机器人   六轮差速  

摘要： 文章针对巡检机器人导航定位与运动控制精度要求,提出了一种基于无线射频识别(Radio Frequency Identification,RFID)定位与模糊比例、积分和微分(Proportional Integral Derivative,PID)的巡检机器人运动控制策略。通过建立六轮差速型巡检机器人运动学模型,对巡检机器人前进与停车状态进行误差分析,设计了基于RFID定位与模糊PID的巡检机器人运动控制策略,选取了0.5、1m/s运行速度及无负载、负载300kg两种情况开展实验分析,经分析该控制策略相较于磁导航+传统PID控制方法准确性更高,误差可控制在1.6cm内,降低了18.4%。结果表明该控制策略的准确性、稳定性均有明显提升,验证了方法的有效性,解决了巡检机器人导航定位与运动控制系统误差大的难题,实现了运动控制的准确性、稳定性和鲁棒性目标。