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关键词： Office buildings  

摘要： People spend a significant amount of time in indoor spaces (e.g., office buildings, subway systems, etc.) in their daily lives. Therefore, it is important to develop efficient indoor spatial query algorithms for supporting various location-based applications. However, indoor spaces differ from outdoor spaces because users have to follow the indoor floor plan for their movements. In addition, positioning in indoor environments is mainly based on sensing devices (e.g., RFID readers) rather than GPS devices. Consequently, we cannot apply existing spatial query evaluation techniques devised for outdoor environments for this new challenge. Because Bayesian filtering techniques can be employed to estimate the state of a system that changes over time using a sequence of noisy measurements made on the system, in this research, we propose the Bayesian filtering-based location inference methods as the basis for evaluating indoor spatial queries with noisy RFID raw data. Furthermore, two novel models, indoor walking graph model and anchor point indexing model, are created for tracking object locations in indoor environments. Based on the inference method and tracking models, we develop innovative indoor range and k nearest neighbor (kNN) query algorithms. We validate our solution through use of both synthetic data and real-world data. Our experimental results show that the proposed algorithms can evaluate indoor spatial queries effectively and efficiently. We open-source the code, data, and floor plan at https://***/DataScienceLab18/IndoorToolKit. Copyright © 2022, The Authors. All rights reserved.

关键词： 手术室   高值耗材   RFID技术   一物一码   智能硬件终端   HIS系统  

摘要： 目的运用智能管理系统进行手术室高值耗材全流程闭环管理,为手术室临床工作提供借鉴。方法运用射频识别(RFID)技术将我院高值耗材进行一物一码标识和自动识别,通过RFID智能终端与医院手术室原有HIS管理系统实现信息无缝对接,构建医院医疗物联网(HIOT)系统。根据我院手术室实际场地及工作流程进行高值耗材智能全流程闭环管理方案的系统开发,实现高值耗材在医院采购中心一级库、手术室二级库之间的双向流动,以及对院内和院外采购、供应、收费、财务核算等信息进行实时管控。结果使用智能高值耗材系统后,巡回护士外出领取高值耗材与之前相比,频次由(2.39±0.71)次/台降至(1.20±0.42)次/台;护士每月漏收费频次由使用前的7.33次/月降至0次/月;每月漏收费金额由使用前的(21376.25±6547.49)元/月降至0元/月。使用前后比较,差异均具有统计学意义(P<0.01)。结论运用RFID技术对手术室高值耗材进行智能全流程闭环管理,可实现多部门实时监管高值耗材,有效提高医务人员的工作效率。

关键词： 工业互联网   数据溯源   区块链   公钥加密   射频识别技术   星际文件系统  

摘要： 针对工业互联网数据溯源过程中存在的不安全问题,提出一种基于区块链的工业互联网数据溯源方案。利用射频识别技术中的阅读器对工业产品生产、加工、仓储、运输和销售全过程进行信息采集,并存储于电子标签中转为二维码方便溯源。同时,通过对称加密算法对工业产品的隐私信息进行加密,采用公钥加密算法加密对称密钥后存储于区块链中,调用智能合约实现信息存储和共享。安全性分析和性能分析表明,该方案可提高工业产品信息安全性、溯源过程可靠性和数据传输高效性。

关键词： RFID技术   骨科   无菌物品   数字化管理  

摘要： 目的探索基于射频识别(RFID)技术的骨科无菌物品的数字化管理效果。方法选取某院骨科2019年12月至2021年7月的6000件无菌物品为研究对象,采用对照的方法,比较常规管理与基于RFID技术的数字化管理的管理效果。结果数字化管理组无菌物品的过期率、破损率、检查时间、取放时间均少于常规管理组(P<0.05);数字化管理组护理质量中无菌室环境、消毒隔离、护理服务的评分、医护满意度、患者满意度均高于常规管理组(P<0.05);数字化管理组的护理缺陷事件发生率、医院感染发生率低于常规管理组(P<0.05)。结论应用基于RFID技术的数字化管理可降低无菌物品的过期率与破损率,且可缩短无菌药物的检查与取放时间,减少护理缺陷事件及医院感染的发生,提高护理质量与医院满意度。

关键词： 射频识别   模块状态   通信机制   RFID   ZigBee  

摘要： 阐述射频识别RFID系统的设计框架,ZigBee系统功能和实现,包括ZigBee模块状态转换、ZigBee技术的通信机制确定、应答器信息写入、射频识别。

关键词： RFID技术   煤炭企业   仓库管理   系统设计  

摘要： 仓库管理对煤炭企业发展具有关键性作用,如何保证仓库管理更具高效化,实现煤炭生产中设备、配件、材料等库存物资自动化辨识目标,从本质层面充分补充原有传统管理模式存在的不足,实现煤炭企业仓库物资管理信息自动化,是当下煤炭企业需解决问题之一。RFID可实现对物品进行智能化辨识、定位、跟踪及管控,将其用于煤炭企业仓库管理中,进一步提高仓库管理水平,实现电子化操作,提高仓库利用率和工作效率,保证煤炭企业良好发展。

关键词： 智慧酒店   人工智能   管理系统   RFID模块  

摘要： 随着时代的不断发展和变化,物联网与人工智能等技术的不断变化升级,人们的消费习惯和需求也不断变化。尤其是,2020年以来疫情防控的需要,人们对线上化消费需求日益旺盛,对非接触式服务需求也变得更为刚需。本文以当前传统酒店向智慧酒店转型所需求的智能化运营技术为研究对象,探讨使用RFID技术实现酒店的客户路线引导、会议管理、客房管理和车辆停泊等线上化迎宾服务。解决传统酒店应对消费者需求响应慢和酒店运营成本高等问题。

关键词： 生产过程监视   可编程逻辑控制器   射频识别   应用于过程控制的OLE(OPC)   追溯  

摘要： 针对目前汽车装配监视生产线仍需人工作业、工作步骤繁琐以及效率不高的情况,设计了基于西门子S7-1200 PLC和西克射频识别(Radio Frequency Identification,RFID)技术的装配监视追溯系统。详细介绍了该系统的基本结构,系统实现了生产现场自动采集和写入仪表信息,上位机集中监视现场装配状况,同时将数据库中的仪表信息接入汽车厂制造企业生产过程执行管理系统(Manufacturing Process Execution Management System,MES),为汽车零/部件追溯和故障召回提供数据支持。该系统已在长春某汽车厂正式投入使用6个月,实践应用表明,该系统提高了工作效率,运行平稳,采集仪表底盘号成功率在99%以上,取得了良好的预期效果。

关键词： Estimation   RFID tags   Standards   Electronic mail   Protocols   Mobile computing   RFID   anti-collision   propagation   unreliable channel   time efficiency  

摘要： Radio frequency identification (RFID) has been widely applied in large-scale applications such as logistics, merchandise and transportation. However, it is still a technical challenge to effectively estimate the number of tags in complex mobile environments. Most of existing tag identification protocols assume that readers and tags remain stationary throughout the whole identification process and ideal channel assumptions are typically considered between them. Hence, conventional algorithms may fail in mobile scenarios with unreliable channels. In this paper, we propose a novel RFID anti-collision algorithm for tag identification considering path loss. Based on a probabilistic identification model, we derive the collision, empty and success probabilities in a mobile RFID environment, which will be used to define the cardinality estimation method and the optimal frame length. Both simulation and experimental results of the proposed solution show noticeable performance improvement over the commercial solutions.

关键词： Optimization   Radiofrequency identification   Sensors   Planning   Linear programming   Interference   Pareto optimization   Multi-objective RFID network planning (MORNP)   multi-objective mayfly optimization algorithm (MOMA)   dimensional swap variation   pareto  

摘要： In this study, a multi-objective mayfly optimization algorithm based on dimensional swap variation (DSV-MOMA) is proposed to solve Multi-objective RFID network planning problem (MORNP). The contributions of this work are as following: firstly, improving multi-objective mayfly optimization algorithm (MOMA)'s ability to solve high-dimensional nonlinear optimization problems;secondly, DSV-MOMA is used to solve the MORNP problem, and optimize two and three of the four objective functions simultaneously;lastly, the fuzzy decision mechanism is used to select an optimal solution objectively from pareto optimal solutions. The proposed DSV-MOMA algorithm contributes to having better diversity and convergence when solving high dimensional nonlinear and discontinuous test functions in comparison to other popular metaheuristic algorithms. DSV-MOMA also performs well when dealing with MORNP problems. In most experiments, DSV-MOMA can reduce interference effectively, and obtain satisfactory load balance and power while ensuring a higher coverage.