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Exploration of transferable deep learning-aided radio frequency fingerprint identification systems

Security and Safety 2024年第1期3卷 7-20页

作者： Guanxiong shen Junqing Zhang Department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJUK

Radio frequency fingerprint identification(RFFI)shows great potential as a means for authenticating wireless *** RFFI can be addressed as a classification problem,deep learning techniques are widely utilized in modern RFFI systems for their outstanding *** is suitable for securing the legacy existing Internet of Things(IoT)networks since it does not require any modifications to the existing end-node hardware and communication ***,most deep learning-based RFFI systems require the collection of a great number of labelled signals for training,which is time-consuming and not ideal,especially for the Io T end nodes that are already deployed and configured with long transmission ***,the long time required to train a neural network from scratch also limits rapid deployment on legacy Io T *** address the above issues,two transferable RFFI protocols are proposed in this paper leveraging the concept of transfer *** specifically,they rely on fine-tuning and distance metric learning,respectively,and only require only a small amount of signals from the legacy IoT *** the dataset used for transfer is small,we propose to apply augmentation in the transfer process to generate more training signals to improve performance.A lo Ra-RFFI testbed consisting of 40 commercial-off-the-shelf(COTS)lo Ra IoT devices and a software-defined radio(SDR)receiver is built to experimentally evaluate the proposed *** experimental results demonstrate that both the fine-tuning and distance metric learning-based RFFI approaches can be rapidly transferred to another Io T network with less than ten signals from each lo Ra *** classification accuracy is over 90%,and the augmentation technique can improve the accuracy by up to 20%.

关键词： Device authentication internet of things loRa radio frequency ngerprint identi cation deep learning wireless security

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Federated Dynamic Client Selection for Fairness Guarantee in Heterogeneous Edge Computing

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Journal of Computer Science & Technology 2024年第1期39卷 139-158页

作者：毛莺池沈莉娟吴俊平萍吴杰 Key Laboratory of Water Big Data Technology of Ministry of Water Resources Hohai UniversityNanjing 211100China College of Computer and Information Hohai UniversityNanjing 211100China Center of Networked Computing Temple UniversityPhiladelphiaPA 19122-6096U.S.A

Federated learning has emerged as a distributed learning paradigm by training at each client and aggregat-ing at a parameter *** heterogeneity hinders stragglers from responding to the server in time with huge com-munication *** client grouping in federated learning can solve the straggler problem,the stochastic selection strategy in client grouping neglects the impact of data distribution within each ***,current client grouping ap-proaches make clients suffer unfair participation,leading to biased performances for different *** order to guaran-tee the fairness of client participation and mitigate biased local performances,we propose a federated dynamic client selec-tion method based on data representativity(FedSDR).FedSDR clusters clients into groups correlated with their own lo-cal computational *** estimate the significance of client datasets,we design a novel data representativity evalua-tion scheme based on local data ***,the two most representative clients in each group are selected to optimize the global ***,the DYNAMIC-SELECT algorithm updates local computational efficiency and data representativity states to regroup clients after periodic average *** on real datasets show that FedS-DR improves client participation by 27.4%,37.9%,and 23.3%compared with FedAvg,TiFL,and FedSS,respectively,tak-ing fairness into account in federated *** addition,FedSDR surpasses FedAvg,FedGS,and FedMS by 21.32%,20.4%,and 6.90%,respectively,in local test accuracy variance,balancing the performance bias of the global model across clients.

关键词： federated learning fairness computational efficiency data distribution client selection client grouping

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Neurovascular unit in diabetic retinopathy:pathophysiological roles and potential therapeutical targets

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Eye and Vision 2021年第3期8卷 135-153页

作者： shen Nian Amy C.Y.lo Yajing Mi Kai Ren Di Yang Department of Pathology Xi’an Medical UniversityXi’anShaanxi ProvinceChina Department of Ophthalmology LKS Faculty of MedicineThe University of Hong KongHong KongHong Kong Institute of Basic Medicine Science Xi’an Medical UniversityXi’anShaanxi ProvinceChina Department of Biochemistry and Molecular Biology Xi’an Medical UniversityXi’anShaanxi ProvinceChina Department of Ophthalmology First Affiliated Hospital of Kunming Medical UniversityKunming Medical UniversityKunmingYunnan ProvinceChina

Diabetic retinopathy(DR),one of the common complications of diabetes,is the leading cause of visual loss in working-age individuals in many industrialized *** has been traditionally regarded as a purely microvascular disease in the ***,an increasing number of studies have shown that DR is a complex neurovascular disorder that affects not only vascular structure but also neural tissue of the *** of neural retina could precede microvascular abnormalities in the DR,leading to microvascular ***,disruption of interactions among neurons,vascular cells,glia and local immune cells,which collectively form the neurovascular unit,is considered to be associated with the progression of DR early on in the ***,it makes sense to develop new therapeutic strategies to prevent or reverse retinal neurodegeneration,neuroinflammation and impaired cell-cell interactions of the neurovascular unit in early stage ***,we present current perspectives on the pathophysiology of DR as a neurovascular disease,especially at the early *** novel treatments for preventing or reversing neurovascular injuries in DR are discussed as well.

关键词： Diabetic retinopathy Neurovascular unit Neurodegeneration Gliosis Inflammation treatment

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列车乘务员职业紧张与睡眠质量的关系:应对策略的中介作用和内在投入的调节作用

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环境与职业医学 2024年第5期41卷 512-518页

作者：李虹静申希平薛颖陇东学院医学院甘肃庆阳745000 兰州大学公共卫生学院甘肃兰州730000 中国铁路兰州局集团公司疾病预防控制所甘肃兰州730000

[背景]职业紧张与睡眠障碍的发生密切相关。列车乘务员作为职业紧张的高危群体,其睡眠质量对于道路交通安全意义重大。[目的]探讨职业紧张影响列车乘务员睡眠质量的方向和程度,分析应对策略和内在投入在两者关系中的中介作用和调节作用... 详细信息

[背景]职业紧张与睡眠障碍的发生密切相关。列车乘务员作为职业紧张的高危群体,其睡眠质量对于道路交通安全意义重大。[目的]探讨职业紧张影响列车乘务员睡眠质量的方向和程度,分析应对策略和内在投入在两者关系中的中介作用和调节作用。[方法]2022年7月1日—7月31日,整群抽取中国铁路兰州局集团公司3个机务段的6219名列车乘务员为研究对象。采用《付出-回报失衡问卷》《个体应对能力问卷》《匹兹堡睡眠质量指数量表》对其职业紧张、内在投入、应对策略、睡眠质量进行线上调查。采用SPSS 25.0软件进行单因素分析和相关性分析,以Process V3.3宏程序插件构建中介效应及调节效应模型,使用Harman单因素检验法进行共同方法偏差检验。[结果]共发放问卷6219份,回收有效问卷5738份,有效回收率为92.27%。列车乘务员职业紧张评分为(1.22±0.29)分,内在投入评分为(16.38±3.55)分,应对策略评分为(50.00±10.00)分,睡眠质量评分为(11.51±3.95)分。Pearson相关性分析结果显示:职业紧张与内在投入和睡眠质量得分呈正相关(r=0.435、0.321,P<0.01),与应对策略得分呈负相关(r=-0.286,P<0.01);内在投入与睡眠质量得分呈正相关(r=0.367,P<0.01),与应对策略得分呈负相关(r=-0.210,P<0.01);应对策略与睡眠质量得分呈负相关(r=-0.244,P<0.01)。职业紧张可以正向预测列车乘务员的睡眠质量(b=3.658,t=21.177,P<0.001);应对策略在职业紧张与睡眠质量之间起部分中介作用,效应量为0.581,占总效应的15.88%;内在投入在“职业紧张-应对策略-睡眠质量”这一中介过程中的前半部分调节作用显著(P<0.001)。[结论]职业紧张通过应对策略的中介效应对列车乘务员的睡眠质量产生影响,且该中介路径的前半部分受内在投入的调节。

关键词：职业紧张睡眠质量应对策略内在投入列车乘务员

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The Rice RMR1 Associates with a Distinct Prevacuolar Compartment for the Protein Storage Vacuole Pathway

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Molecular Plant 2011年第5期4卷 854-868页

作者： Yun shen Junqi Wang Yu Ding Sze Wan lo Guillaume Gouzerh Jean-Marc Neuhau Liwen Jiang School of Life Sciences Centre for Cell and Developmental Biology The Chinese University of Hong Kong Shatin New Territories Hong Kong China Laboratory of Cell and Molecular Biology University of Neuchatel CH-2000 Neuchatel Switzerland

Transport of vacuolar proteins from Golgi apparatus or trans-Golgi network （TGN） to vacuoles is a receptor-mediated process via an intermediate membrane-bound prevacuolar compartment （PVC） in plant cells. Both vacuolar sorting receptor （VSR） and receptor homology region-transmembrane domain-RING-H2 （RMR） proteins have been shown to function in transporting storage proteins to protein storage vacuole （PSV）, but little is known about the nature of the PVC for the PSV pathway. Here, we use the rice RMR1 （OsRMR1） as a probe to study the PSV pathway in plants. Immunogold electron microscopy （EM） with specific OsRMR1 antibodies showed that OsRMR1 proteins were found in the Golgi apparatus, TGN, and a distinct organelle with characteristics of PVC in both rice culture cells and developing rice seeds, as well as the protein body type II （PBII） or PSV in developing rice seeds. This organelle, also found in both tobacco BY-2 and Arabidopsis suspension cultured cells, is morphologically distinct from the VSR-positive multivesicular lytic PVC or multivesicular body （MVB） and thus represent a PVC for the PSV pathway that we name storage PVC （sPVC）. Further in vivo and in vitro interaction studies using truncated OsRMR1 proteins secreted into the culture media of transgenic BY-2 suspension cells demonstrated that OsRMR1 functions as a sorting receptor in transporting vicilin-like storage proteins.

关键词： PSV RMR storage PVC sorting receptor transport pathway.

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白藜芦醇通过下调PRMT5表达抑制肝胆管癌SMMC-7721细胞的增殖、侵袭和细胞周期

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中国肿瘤生物治疗杂志 2024年第3期31卷 219-223页

作者：沈兴艳孙象军广州中医药大学附属临沂人民医院普外科山东临沂276000

目的:探究白藜芦醇(Res)通过调控PRMT5表达对肝胆管癌SMMC-7721细胞增殖、侵袭、细胞周期的影响及其机制。方法:常规培养正常肝细胞lo2和SMMC-7721细胞,用0、20、40、80μmol/L的Res进行处理,用qPCR法、MTT法、Transwell实验、流式细胞... 详细信息

目的:探究白藜芦醇(Res)通过调控PRMT5表达对肝胆管癌SMMC-7721细胞增殖、侵袭、细胞周期的影响及其机制。方法:常规培养正常肝细胞lo2和SMMC-7721细胞,用0、20、40、80μmol/L的Res进行处理,用qPCR法、MTT法、Transwell实验、流式细胞术和WB法分别检测Res处理后PRMT5 mRNA在lo2和SMMC-7721细胞中的表达,Res对SMMC-7721细胞增殖能力、侵袭能力、细胞周期和凋亡,以及PRMT5、cyclin D1和cyclin E1蛋白表达的影响。结果:PRMT5在SMMC-7721细胞中呈高表达(P<0.01);20、40、80μmol/L Res均能明显抑制PRMT5 mRNA和蛋白在SMMC-7721细胞中的表达(均P<0.01),抑制SMMC-7721细胞的增殖能力(P<0.01)和侵袭能力(P<0.05),阻滞SMMC-7721细胞周期于G0/G1期并促进其凋亡(P<0.01),明显抑制SMMC-7721细胞中周期蛋白cyclin D1、cyclin E1蛋白的表达(P<0.01)。结论:PRMT5在SMMC7721细胞中呈高表达,Res可有效抑制SMMC-7721细胞的增殖和侵袭能力并诱导其凋亡,其机制可能与抑制PRMT5表达相关。

关键词：白藜芦醇肝胆管癌 SMMC-7721细胞蛋白质精氨酸甲基转移酶5 增殖侵袭细胞周期凋亡

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S波接收函数揭示的华南陆块岩石圈结构及构造启示

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大地构造与成矿学 2024年第3期48卷 410-419页

作者：沈旭章陈萌萌程思远王岳军黄斯燃中山大学地球科学与工程学院广东省地球动力作用与地质灾害重点实验室广东珠海519082 南方海洋科学与工程广东省实验室(珠海) 广东珠海519082

本研究利用华南陆块固定地震台站记录到的远震地震波资料,构建适合研究LAB的S波接收函数,基于接收函数波形分析和偏移成像结果对华南陆块岩石圈性质进行了研究。结果显示华南陆块下方70 km深度存在最明显且连续性相对较好的低速界面,结... 详细信息

本研究利用华南陆块固定地震台站记录到的远震地震波资料,构建适合研究LAB的S波接收函数,基于接收函数波形分析和偏移成像结果对华南陆块岩石圈性质进行了研究。结果显示华南陆块下方70 km深度存在最明显且连续性相对较好的低速界面,结合其他地球物理研究成果,我们认为70 km深度低速界面反映了和软流圈上涌相关的构造事件导致的华南岩石圈大规模减薄;在华夏地块的东部较大范围探测到100~150 km深度内存在南倾的低速界面,结合区域岩石学、地球化学和地质学等研究成果,推测该现象可能表明扬子地块的岩石圈楔入到了华夏地块,是新元古代早‒中期以来,华南陆块俯冲聚合、陆内造山以及陆内构造变形等地球动力学事件留下的重要痕迹;在华夏地块中东部和江南造山带局部发现了LAB缺失区带,该现象可能与岩石圈拆沉导致的热物质上涌密切相关,可能对应了地块拼贴薄弱带。

关键词：华南陆块 LAB 地震波 S波接收函数岩石圈拆沉

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Design and Control of a Pneumatically Actuated Transtibial Prosthesis

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Journal of Bionic Engineering 2015年第2期12卷 217-226页

作者： Hao Zheng Xiangrong shen Department of Mechanical Engineering University of Alabama 359 H.M. Comer Hall Box 870276 Tuscaloosa AL 35487-0276 USA

This paper presents the design and control of a pneumatically actuated transtibial prosthesis, which utilizes a pneumatic cylinder-type actuator to power the prosthetic ankle joint to support the user＇s locomotion. The pneumatic actuator has multiple advantages over the traditional electric motor, such as light weight, low cost, and high power-to-weight ratio. The objective of this work is to develop a compact and lightweight transtibial prosthesis, leveraging the multiple advantages provided by this highly competitive actuator. In this paper, the design details of the prosthesis are described, including the determination of performance specifications, the layout of the actuation mechanism, and the calculation of the torque capacity. Through the authors＇ design calculation, the prosthesis is able to provide sufficient range of motion and torque capacity to support the lo- comotion of a 75 Kg individual. The controller design is also described, including the underlying biomechanical analysis and the formulation of the finite-state impedance controller. The testing results of human subject indicate that the prosthesis is able to generate a natural walking gait and sufficient power output for its amputee user.

关键词： lower limb prosthesis powered prosthesis rehabilitation robotics assistive robotic devices

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A New Quality Improving Scheme for VQ Decompressed Images Based on DWT

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Journal of Electronic Science and Technology 2013年第1期11卷 51-57页

作者： Yung-Chen Chou Ya-Hsin lo Jaui-Ji shen the Department of Computer Science and Information Engineering Asia University the Department of Management Information Systems National Chung Hsing University

The better compression rate can be achieved by the traditional vector quantization （VQ） method, and the quality of the recovered image can also be accepted. But the decompressed image quality can not be promoted efficiently, so how to balance the image compression rate and image recovering quality is an important issue, in this paper, an image is transformed by discrete wavelet transform （DWT） to generate its DWT transformed image which can be compressed by the VQ method further. Besides, we compute the values between the DWT transformed image and decompressed DWT transformed image as the difference matrix which is the adjustable basis of the decompressed image quality. By controlling the deviation of the difference matrix, there can be nearly Iossless compression for the VQ method. Experimental results show that when the number of compressed bits by our method is equal to the number of those bits compressed by the VQ method, the quality of our recovered image is better. Moreover, the proposed method has more compression capability comparing with the VQ scheme.

关键词： Difference matrix discrete wavelet transform image compression vector quantization.

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Successful bailout stenting strategy against rare spontaneous retrograde dissection of partially absorbed magnesium-based resorbable scaffold:A case report

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World Journal of Clinical Cases 2021年第5期9卷 1148-1155页

作者： Zhen-Yu Liao Jer-Young Liou shen-Chang Lin Huei-Fong Hung Che-Ming Chang Lung-Ching Chen Su-Kiat Chua Huey-Ming lo Chi-Feng Hung Division of Cardiology Department of Internal MedicineShin Kong Wu Ho-Su Memorial HospitalTaipei 11101Taiwan Ph.D.Program in Nutrition and Food Science Fu Jen Catholic UniversityNew Taipei 24205Taiwan School of Medicine Fu Jen Catholic UniversityNew Taipei 24205Taiwan MS Program Transdisciplinary long-Term Care Fu Jen Catholic UniversityNew Taipei 24205Taiwan Ph.D.Program in Pharmaceutical Biotechnology Fu Jen Catholic UniversityNew Taipei 24205Taiwan

BACKGROUND In the development of coronary stent technology,bioresorbable scaffolds are promising milestones in improving the clinical treatment of coronary artery ***“leave nothing behind”motto is the premise of the fourth revolution in percutaneous coronary intervention(PCI).Studies proving the safety and efficacy of the magnesium-based resorbable scaffolds(MgBRSs)include the BIOSOLVE-I and BIOSOLVE-II trials and the latest BIOSOLVE-IV ***,spontaneous retrograde dissection of a partially absorbed MgBRS may still occur,albeit *** SUMMARY We describe an unusual case of coronary artery disease in a patient who had undergone a successful PCI 8 mo earlier,where an MgBRS was implanted into the left anterior descending artery(LAD)and left circumflex artery with drug-coated balloons for a ramus intermedius branch stenosis to achieve the“leave nothing behind”therapeutic intention and was currently presenting with a gradual worsening of chest *** distal edge vascular response,during subsequent attempts with balloon angioplasty was performed ***,spontaneous retrograde dissection of a partially absorbed MgBRS in the LAD *** bailout stenting was performed with revascularization of the entry and exit sites created by spontaneous dissection and complete sealing of the intramural *** patient recovered well and was discharged after 2 d of *** followed up in August 2020(7 mo later),the patient showed uneventful *** Spontaneous retrograde dissection of a partially absorbed MgBRS was successfully treated using bailout sirolimus-eluting coronary stent strategy.

关键词： Coronary artery disease Percutaneous coronary intervention Magnesium Stents Dissection Case report

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