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An Improved Dictionary Cracking Scheme Based on Multiple GPUs for Wi-Fi Network 被引量:1
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作者 Majdi K.Qabalin Zaid A.Arida +4 位作者 Omar A.Saraereh Falin Wu Imran Khan Peerapong Uthansakul Moath Alsafasfeh 《Computers, Materials & Continua》 SCIE EI 2021年第3期2957-2972,共16页
The Internet has penetrated all aspects of human society and has promoted social progress.Cyber-crimes in many forms are commonplace and are dangerous to society and national security.Cybersecurity has become a major ... The Internet has penetrated all aspects of human society and has promoted social progress.Cyber-crimes in many forms are commonplace and are dangerous to society and national security.Cybersecurity has become a major concern for citizens and governments.The Internet functions and software applications play a vital role in cybersecurity research and practice.Most of the cyber-attacks are based on exploits in system or application software.It is of utmost urgency to investigate software security problems.The demand for Wi-Fi applications is proliferating but the security problem is growing,requiring an optimal solution from researchers.To overcome the shortcomings of the wired equivalent privacy(WEP)algorithm,the existing literature proposed security schemes forWi-Fi protected access(WPA)/WPA2.However,in practical applications,the WPA/WPA2 scheme still has some weaknesses that attackers exploit.To destroy a WPA/WPA2 security,it is necessary to get a PSK pre-shared key in pre-shared key mode,or an MSK master session key in the authentication mode.Brute-force cracking attacks can get a phase-shift keying(PSK)or a minimum shift keying(MSK).In real-world applications,many wireless local area networks(LANs)use the pre-shared key mode.Therefore,brute-force cracking of WPA/WPA2-PSK is important in that context.This article proposes a new mechanism to crack theWi-Fi password using a graphical processing unit(GPU)and enhances the efficiency through parallel computing of multiple GPU chips.Experimental results show that the proposed algorithm is effective and provides a procedure to enhance the security of Wi-Fi networks. 展开更多
关键词 networks PASSWORD CYBERSECURITY password cracking mechanism
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Security Threat and Data Consumption as Mojor Nuisance of Social Media on Wi-Fi Network 被引量:1
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作者 Fuseini Inusah Ibrahim Mohammed Gunu Gaddafi Abdul-Salaam 《International Journal of Communications, Network and System Sciences》 2021年第2期15-29,共15页
This research is about the nuisances of social media applications on a Wi-Fi network at a university campus in Ghana. The aim was to access the security risk on the network, the speed of the network, and the data cons... This research is about the nuisances of social media applications on a Wi-Fi network at a university campus in Ghana. The aim was to access the security risk on the network, the speed of the network, and the data consumption of those platforms on the network. Network Mapper (Nmap Zenmap) Graphical User Interface 7.80 application was used to scan the various social media platforms to identify the protocols, ports, services, etc. to enable in accessing the vulnerability of the network. Data consumption of users’ mobile devices was collected and analyzed. Device Accounting (DA) based on the various social media applications was used. The results of the analysis revealed that the network is prone to attacks due to the nature of the protocols, ports, and services on social media applications. The numerous users with average monthly data consumption per user of 4 gigabytes, 300 megabytes on social media alone are a clear indication of high traffic as well as the cost of maintaining the network. A URL filtering of the social media websites was proposed on Rockus Outdoor AP to help curb the nuisance. 展开更多
关键词 Data Consumption Device Accounting Mobile Devices Social Media WiFi network Rockus Outdoor AP
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WiMA:Towards a Multi-Criterion Association in Software Defined Wi-Fi Networks
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作者 Sohaib Manzoor Hira Manzoor +5 位作者 Saddaf Rubab Muhammad Attique Khan Majed Alhaisoni Abdullah Alqahtani Ye Jin Kim Byoungchol Chang 《Computers, Materials & Continua》 SCIE EI 2023年第5期2347-2363,共17页
Despite the planned installation and operations of the traditional IEEE 802.11 networks,they still experience degraded performance due to the number of inefficiencies.One of the main reasons is the received signal str... Despite the planned installation and operations of the traditional IEEE 802.11 networks,they still experience degraded performance due to the number of inefficiencies.One of the main reasons is the received signal strength indicator(RSSI)association problem,in which the user remains connected to the access point(AP)unless the RSSI becomes too weak.In this paper,we propose a multi-criterion association(WiMA)scheme based on software defined networking(SDN)in Wi-Fi networks.An association solution based on multi-criterion such as AP load,RSSI,and channel occupancy is proposed to satisfy the quality of service(QoS).SDNhaving an overall view of the network takes the association and reassociation decisions making the handoffs smooth in throughput performance.To implementWiMA extensive simulations runs are carried out on Mininet-NS3-Wi-Fi network simulator.The performance evaluation shows that the WiMA significantly reduces the average number of retransmissions by 5%–30%and enhances the throughput by 20%–50%,hence maintaining user fairness and accommodating more wireless devices and traffic load in the network,when compared to traditional client-driven(CD)approach and state of the art Wi-Balance approach. 展开更多
关键词 ASSOCIATION multi-criterion SDN wi-fi
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Network perspective on rumination and non-suicidal self-injury among adolescents with depressive disorders
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作者 Fang-Fang Zhang Rui Guo +3 位作者 Si-Lan Chen Wei Yang Xing-Li Liang Ming-Fang Ma 《World Journal of Psychiatry》 2026年第1期346-355,共10页
BACKGROUND Non-suicidal self-injury(NSSI)is common among adolescents with depressive disorders and poses a major public health challenge.Rumination,a key cognitive feature of depression,includes different subtypes tha... BACKGROUND Non-suicidal self-injury(NSSI)is common among adolescents with depressive disorders and poses a major public health challenge.Rumination,a key cognitive feature of depression,includes different subtypes that may relate to NSSI through distinct psychological mechanisms.However,how these subtypes interact with specific NSSI behaviors remains unclear.AIM To examine associations between rumination subtypes and specific NSSI behaviors in adolescents.METHODS We conducted a cross-sectional study with 305 hospitalized adolescents diagnosed with depressive disorders.The subjects ranged from 12-18 years in age.Rumi-nation subtypes were assessed using the Ruminative Response Scale,and 12 NSSI behaviors were evaluated using a validated questionnaire.Network analysis was applied to explore symptom-level associations and identify central symptoms.RESULTS The network analysis revealed close connections between rumination subtypes and NSSI behaviors.Brooding was linked to behaviors such as hitting objects and burning.Scratching emerged as the most influential NSSI symptom.Symptomfocused rumination served as a key bridge connecting rumination and NSSI.CONCLUSION Symptom-focused rumination and scratching were identified as potential intervention targets.These findings highlight the psychological significance of specific cognitive-behavioral links in adolescent depression and suggest directions for tailored prevention and treatment.However,the cross-sectional,single-site design limits causal inference and generalizability.Future longitudinal and multi-center studies are needed to confirm causal pathways and verify the generalizability of the findings to broader adolescent populations. 展开更多
关键词 Depressive disorders Adolescents network analysis RUMINATION Non-suicidal self-injury
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Investigating the potential mechanisms of Wenqing Yin against atopic dermatitis based on network pharmacology,experimental pharmacology,and molecular docking
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作者 Yi Wang Zhen Liu +3 位作者 Si-Man Li Lin Lin Wei Dai Meng-Yue Ren 《Traditional Medicine Research》 2026年第2期1-11,共11页
Background:Wenqing Yin(WQY)is a classic prescription used to treat skin diseases like atopic dermatitis(AD)in China,and the aim of this study is to investigate the therapeutic effects and molecular mechanisms of WQY o... Background:Wenqing Yin(WQY)is a classic prescription used to treat skin diseases like atopic dermatitis(AD)in China,and the aim of this study is to investigate the therapeutic effects and molecular mechanisms of WQY on AD.Methods:The DNFB-induced mouse models of AD were established to investigate the therapeutic effects of WQY on AD.The symptoms of AD in the ears and backs of the mice were assessed,while inflammatory factors in the ear were quantified using quantitative real-time-polymerase chain reaction(qRT-PCR),and the percentages of CD4^(+)and CD8^(+)cells in the spleen were analyzed through flow cytometry.The compounds in WQY were identified using ultra-performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS)analysis and the key targets and pathways of WQY to treat AD were predicted by network pharmacology.Subsequently,the key genes were tested and verified by qRT-PCR,and the potential active components and target proteins were verified by molecular docking.Results:WQY relieved the AD symptoms and histopathological injuries in the ear and back skin of mice with AD.Meanwhile,WQY significantly reduced the levels of inflammatory factors IL-6 and IL-1βin ear tissue,as well as the ratio of CD4^(+)/CD8^(+)cells in spleen.Additionally,a total of 142 compounds were identified from the water extract of WQY by UPLC-Orbitrap-MS/MS.39 key targets related to AD were screened out by network pharmacology methods.The KEGG analysis indicated that the effects of WQY were primarily mediated through pathways associated with Toll-like receptor signaling and T cell receptor signaling.Moreover,the results of qRT-PCR demonstrated that WQY significantly reduced the mRNA expressions of IL-4,IL-10,GATA3 and FOXP3,and molecular docking simulation verified that the active components of WQY had excellent binding abilities with IL-4,IL-10,GATA3 and FOXP3 proteins.Conclusion:The present study demonstrated that WQY effectively relieved AD symptoms in mice,decreased the inflammatory factors levels,regulated the balance of CD4^(+)and CD8^(+)cells,and the mechanism may be associated with the suppression of Th2 and Treg cell immune responses. 展开更多
关键词 Wenqing Yin atopic dermatitis mouse model UPLC-Orbitrap-MS/MS network pharmacology
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Combined Fault Tree Analysis and Bayesian Network for Reliability Assessment of Marine Internal Combustion Engine
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作者 Ivana Jovanović Çağlar Karatuğ +1 位作者 Maja Perčić Nikola Vladimir 《哈尔滨工程大学学报(英文版)》 2026年第1期239-258,共20页
This paper investigates the reliability of internal marine combustion engines using an integrated approach that combines Fault Tree Analysis(FTA)and Bayesian Networks(BN).FTA provides a structured,top-down method for ... This paper investigates the reliability of internal marine combustion engines using an integrated approach that combines Fault Tree Analysis(FTA)and Bayesian Networks(BN).FTA provides a structured,top-down method for identifying critical failure modes and their root causes,while BN introduces flexibility in probabilistic reasoning,enabling dynamic updates based on new evidence.This dual methodology overcomes the limitations of static FTA models,offering a comprehensive framework for system reliability analysis.Critical failures,including External Leakage(ELU),Failure to Start(FTS),and Overheating(OHE),were identified as key risks.By incorporating redundancy into high-risk components such as pumps and batteries,the likelihood of these failures was significantly reduced.For instance,redundant pumps reduced the probability of ELU by 31.88%,while additional batteries decreased the occurrence of FTS by 36.45%.The results underscore the practical benefits of combining FTA and BN for enhancing system reliability,particularly in maritime applications where operational safety and efficiency are critical.This research provides valuable insights for maintenance planning and highlights the importance of redundancy in critical systems,especially as the industry transitions toward more autonomous vessels. 展开更多
关键词 Fault tree analysis Bayesian network RELIABILITY REDUNDANCY Internal combustion engine
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基于Wi-Fi 6的医疗设备无线物联网采集终端研制 被引量:1
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作者 张楠 李静 +4 位作者 张维娇 张斌 周云皓 何昆仑 曹德森 《中国医学装备》 2025年第2期1-8,共8页
目的:针对医疗设备移动化快速部署以及数据高速稳定传输的物联网建设需求,研制基于Wi-Fi 6的医疗设备无线物联网采集终端。方法:采用Wi-Fi 6技术构建医疗设备无线物联网,其数据采集终端包括基于Wi-Fi 6的前置客户端(CPE)和智能无线接入... 目的:针对医疗设备移动化快速部署以及数据高速稳定传输的物联网建设需求,研制基于Wi-Fi 6的医疗设备无线物联网采集终端。方法:采用Wi-Fi 6技术构建医疗设备无线物联网,其数据采集终端包括基于Wi-Fi 6的前置客户端(CPE)和智能无线接入站点。CPE采用国产主控芯片和Wi-Fi芯片(包含两路2.4G和5G天线),适配RS232、RJ45等多种接口,将医疗设备数据通过有线通讯接口转为无线方式传输,通过“白名单+证书”强化安全管控的安全二次认证,支持医疗设备安全准入与数据溯源。智能无线接入站点兼容Wi-Fi、蓝牙、射频识别等多种设备(包含2.4G和5G天线),与CPE联合应用双发选收技术,保证数据稳定传输。结果:对无线物联网采集终端关键性能进行测试,智能采集终端采集与输出数据完整性一致,终端采集与输出数据的时延最高为9 ms,平均2 ms,测试结果能够满足预期要求。结论:基于采集终端构建的医疗设备无线物联网能够稳定、快速采集设备数据至物联网数据平台,为医疗设备无线物联网构建提供范式。 展开更多
关键词 医疗设备 无线物联网 wi-fi 6 采集终端
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Wi-Fi7多链路通感一体化的功率和信道联合智能分配算法 被引量:1
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作者 王靖 方旭明 《计算机应用》 北大核心 2025年第2期563-570,共8页
针对下一代Wi-Fi7设备中多链路传输时通信与感知一体化的功率和信道联合资源分配的问题,根据多链路设备(MLD)特殊的上下两层媒体接入控制层(MAC)结构,提出一种基于QMIX的联合功率控制与信道分配的多链路多智能体强化学习算法(JPCQMIX)... 针对下一代Wi-Fi7设备中多链路传输时通信与感知一体化的功率和信道联合资源分配的问题,根据多链路设备(MLD)特殊的上下两层媒体接入控制层(MAC)结构,提出一种基于QMIX的联合功率控制与信道分配的多链路多智能体强化学习算法(JPCQMIX)。该算法将MLD的每个下层MAC即每条链路作为一个智能体,并在上层MAC中设置混合网络用来处理所有下层MAC的局部值函数,以达到中心式训练的效果。训练完成后,每个下层MAC进入分布式执行模式,并独立地与它的局部环境进行交互,以进行功率控制和信道分配决策。仿真结果表明,相较于多智能体深度Q网络(MADQN)算法和传统启发式粒子群优化(PSO)算法,所提算法在通信吞吐量性能上分别提高了20.51%和29.10%;同时,所提算法在面对不同感知精度阈值和不同链路最低信干噪比(SINR)时,鲁棒性更好。可见,JPCQMIX能有效提升系统在满足感知精度条件下的通信吞吐量。 展开更多
关键词 wi-fi7 多链路 通信感知一体化 多智能体 深度强化学习
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Convolutional Neural Networks Based Indoor Wi-Fi Localization with a Novel Kind of CSI Images 被引量:14
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作者 Haihan Li Xiangsheng Zeng +2 位作者 Yunzhou Li Shidong Zhou Jing Wang 《China Communications》 SCIE CSCD 2019年第9期250-260,共11页
Indoor Wi-Fi localization of mobile devices plays a more and more important role along with the rapid growth of location-based services and Wi-Fi mobile devices.In this paper,a new method of constructing the channel s... Indoor Wi-Fi localization of mobile devices plays a more and more important role along with the rapid growth of location-based services and Wi-Fi mobile devices.In this paper,a new method of constructing the channel state information(CSI)image is proposed to improve the localization accuracy.Compared with previous methods of constructing the CSI image,the new kind of CSI image proposed is able to contain more channel information such as the angle of arrival(AoA),the time of arrival(TOA)and the amplitude.We construct three gray images by using phase differences of different antennas and amplitudes of different subcarriers of one antenna,and then merge them to form one RGB image.The localization method has off-line stage and on-line stage.In the off-line stage,the composed three-channel RGB images at training locations are used to train a convolutional neural network(CNN)which has been proved to be efficient in image recognition.In the on-line stage,images at test locations are fed to the well-trained CNN model and the localization result is the weighted mean value with highest output values.The performance of the proposed method is verified with extensive experiments in the representative indoor environment. 展开更多
关键词 convolutional NEURAL network INDOOR wi-fi LOCALIZATION channel state information CSI image
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改进Deep Q Networks的交通信号均衡调度算法
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作者 贺道坤 《机械设计与制造》 北大核心 2025年第4期135-140,共6页
为进一步缓解城市道路高峰时段十字路口的交通拥堵现象,实现路口各道路车流均衡通过,基于改进Deep Q Networks提出了一种的交通信号均衡调度算法。提取十字路口与交通信号调度最相关的特征,分别建立单向十字路口交通信号模型和线性双向... 为进一步缓解城市道路高峰时段十字路口的交通拥堵现象,实现路口各道路车流均衡通过,基于改进Deep Q Networks提出了一种的交通信号均衡调度算法。提取十字路口与交通信号调度最相关的特征,分别建立单向十字路口交通信号模型和线性双向十字路口交通信号模型,并基于此构建交通信号调度优化模型;针对Deep Q Networks算法在交通信号调度问题应用中所存在的收敛性、过估计等不足,对Deep Q Networks进行竞争网络改进、双网络改进以及梯度更新策略改进,提出相适应的均衡调度算法。通过与经典Deep Q Networks仿真比对,验证论文算法对交通信号调度问题的适用性和优越性。基于城市道路数据,分别针对两种场景进行仿真计算,仿真结果表明该算法能够有效缩减十字路口车辆排队长度,均衡各路口车流通行量,缓解高峰出行方向的道路拥堵现象,有利于十字路口交通信号调度效益的提升。 展开更多
关键词 交通信号调度 十字路口 Deep Q networks 深度强化学习 智能交通
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基于北斗5G+Wi-Fi三网融合的智能驾驶协同通信系统架构研究
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作者 范建淑 周丽明 《中国宽带》 2025年第10期28-30,共3页
随着智能驾驶向高阶演进,传统单一通信技术在高精度定位、低时延、高带宽及全域覆盖能力的局限性日益凸显。本文提出“北斗定位锚定时空基准+5G广域传输实时数据+Wi-Fi局域补盲增强”的三网融合架构,构建覆盖“感知-网络-平台-应用”的... 随着智能驾驶向高阶演进,传统单一通信技术在高精度定位、低时延、高带宽及全域覆盖能力的局限性日益凸显。本文提出“北斗定位锚定时空基准+5G广域传输实时数据+Wi-Fi局域补盲增强”的三网融合架构,构建覆盖“感知-网络-平台-应用”的四层协同体系。阐明了多模态数据融合、异构网络动态调度、时空同步校准等关键技术,论证了该架构在提升行车安全、优化交通效率、赋能无人化运输等场景的有效性,为智能驾驶的发展奠定坚实的基础。 展开更多
关键词 北斗 5G wi-fi 智能驾驶 协同通信 系统架构
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基于光纤及Wi-Fi通信的井下电视系统研究
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作者 高忠献 《自动化仪表》 2025年第6期43-47,共5页
油水井因套管变形、破损、落物等故障会停产,并产生大量维修作业。而油水井套管故障难以直观和全面地掌握,会影响作业措施的制定。针对浅层油水井作业的需求,提出了基于光纤及Wi-Fi通信的井下电视系统,以可见光视频勘察方式确定油水井... 油水井因套管变形、破损、落物等故障会停产,并产生大量维修作业。而油水井套管故障难以直观和全面地掌握,会影响作业措施的制定。针对浅层油水井作业的需求,提出了基于光纤及Wi-Fi通信的井下电视系统,以可见光视频勘察方式确定油水井落物及套管变形、破损情况。该系统由井内视频采集单元、通信子系统、主机及可视界面组成。通过对井内视频采集单元进行防水、抗压设计,使井内视频采集单元在套管内实现深度潜水功能。从井内视频采集单元到井口这段较长的路径,采用光纤通信实现高带宽、超稳定、长距离视频传输。创新性地采用Wi-Fi通信解决绕线盘旋转过程中视频连续传输问题,并使得多台便携式计算机同时接入网络以展示视频画面。试验结果表明,该系统可深入油水井套管内勘察落物,确定套管变形、破损情况,并定位故障位置。该系统的井内视频采集单元可进一步发展为多镜头型结构,以提供更多视角和更广泛的应用。 展开更多
关键词 油水井 套管 井下电视 可见光 光纤 wi-fi 防水 视频连续传输
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基于Wi-Fi 6的高密度区域电力设备通信优化策略
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作者 李风荣 《通信电源技术》 2025年第19期86-88,共3页
为了提升高密度区域电力设备在复杂环境下的通信稳定性与效率,文章围绕Wi-Fi 6技术特性,系统分析了高密度通信场景下面临的信号干扰、网络拥塞、设备兼容性与安全威胁等关键问题,并提出基于Wi-Fi 6的高密度区域电力设备通信优化策略,包... 为了提升高密度区域电力设备在复杂环境下的通信稳定性与效率,文章围绕Wi-Fi 6技术特性,系统分析了高密度通信场景下面临的信号干扰、网络拥塞、设备兼容性与安全威胁等关键问题,并提出基于Wi-Fi 6的高密度区域电力设备通信优化策略,包括干扰抑制策略、网络拥塞控制策略、设备兼容性改进策略及安全增强策略。通过部署与实测,该策略可明显提升高密度区域电力设备通信性能,有效支撑高密度区域电力设备的高效、稳定与安全通信。 展开更多
关键词 wi-fi 6 高密度通信 电力设备
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WiFace:A Secure GeoSocial Networking System Using Wi-Fi Based Multihop MANET
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作者 Lan Zhang Xuan Ding +2 位作者 Zhiguo Wan Ming Gu Xiangyang Li 《ZTE Communications》 2011年第1期27-32,共6页
A number of mobile Online Social Networking (OSN) services have appeared in the market in recent times. While most mobile systems benefit greatly from cloud services, centralized servers and communications infrastru... A number of mobile Online Social Networking (OSN) services have appeared in the market in recent times. While most mobile systems benefit greatly from cloud services, centralized servers and communications infrastructure is not always available. Nor are location-based services offered to mobile devices without GPS. To take advantage of cloud and to address these problems, a Wi-Fi based multihop networking system called MoNet is proposed. On top of MONET we propose a privacy-aware geosocial networking service called WiFace. Where there is no infrastructure, a distributed content sharing protocol significantly shortens the relay path, reduces conflicts, and improves data availability. Furthermore, a security mechanism is developed to protect privacy. Comprehensive experiments performed on MoNet show that the system is more than sufficient to support social networking and even audio and video applications. 展开更多
关键词 wi-fi social network PRIVACY MANET WiFace
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基于时间编码超表面的跌倒特征模拟与Wi-Fi感知数据集辅助构建
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作者 陈少楠 顾家铭 +8 位作者 徐超 孙一淼 王思然 陈展野 刘硕 李会东 戴俊彦 何源 程强 《雷达学报(中英文)》 北大核心 2025年第4期950-960,共11页
随着Wi-Fi感知技术在智能健康监测领域的广泛应用,如何构建高质量的数据集成为亟待解决的关键问题。特别是在监测异常行为(如跌倒)时,传统方法依赖于人体的反复实验,这既存在安全隐患,又面临伦理困境。为应对这一挑战,该文提出了一种基... 随着Wi-Fi感知技术在智能健康监测领域的广泛应用,如何构建高质量的数据集成为亟待解决的关键问题。特别是在监测异常行为(如跌倒)时,传统方法依赖于人体的反复实验,这既存在安全隐患,又面临伦理困境。为应对这一挑战,该文提出了一种基于时间编码超表面的辅助数据样本采集方法。通过模拟人体的运动特征,时间编码超表面可以有效替代人体实验,用于辅助构建Wi-Fi感知数据集。为此该文设计了一款具备0~360°全相位调制能力的时间编码超表面验证了该方案的可行性。实验结果表明,超表面生成的信号能够较好地保留人体运动特征,有效补充真实样本,降低数据采集复杂度,并显著提升模型的监测准确性。该方法为Wi-Fi感知技术的数据采集提供了一种创新且可行的解决方案。 展开更多
关键词 wi-fi感知 时间编码超表面 运动特征生成 数据集构建 LeNet分类网络
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LATITUDES Network:提升证据合成稳健性的效度(偏倚风险)评价工具库
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作者 廖明雨 熊益权 +7 位作者 赵芃 郭金 陈靖文 刘春容 贾玉龙 任燕 孙鑫 谭婧 《中国循证医学杂志》 北大核心 2025年第5期614-620,共7页
证据合成是对现有研究证据进行系统收集、分析和整合的过程,其结果依赖于纳入原始研究的质量,而效度评价(validity assessment,又称偏倚风险评价)则是评估这些原始研究质量的重要手段。现有效度评价工具种类繁多,但部分工具缺乏严格的... 证据合成是对现有研究证据进行系统收集、分析和整合的过程,其结果依赖于纳入原始研究的质量,而效度评价(validity assessment,又称偏倚风险评价)则是评估这些原始研究质量的重要手段。现有效度评价工具种类繁多,但部分工具缺乏严格的开发过程和评估,证据合成过程中应用不恰当的效度评价工具开展文献质量评价,可能会影响研究结论的准确性,误导临床实践。为解决这一困境,2023年9月英国Bristol大学学者牵头成立了效度评价工具一站式资源站LATITUDES Network。该网站致力于收集、整理和推广研究效度评价工具,以促进原始研究效度评价的准确性,提升证据合成的稳健性和可靠性。本文对LATITUDES Network成立背景、收录的效度评价工具,以及评价工具使用的培训资源等内容进行了详细介绍,以期为国内学者更多地了解LATITUDES Network,更好地运用恰当的效度评价工具开展文献质量评价,以及为开发效度评价工具等提供参考。 展开更多
关键词 效度评价 偏倚风险 证据合成 LATITUDES network
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Application of virtual reality technology improves the functionality of brain networks in individuals experiencing pain 被引量:3
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作者 Takahiko Nagamine 《World Journal of Clinical Cases》 SCIE 2025年第3期66-68,共3页
Medical procedures are inherently invasive and carry the risk of inducing pain to the mind and body.Recently,efforts have been made to alleviate the discomfort associated with invasive medical procedures through the u... Medical procedures are inherently invasive and carry the risk of inducing pain to the mind and body.Recently,efforts have been made to alleviate the discomfort associated with invasive medical procedures through the use of virtual reality(VR)technology.VR has been demonstrated to be an effective treatment for pain associated with medical procedures,as well as for chronic pain conditions for which no effective treatment has been established.The precise mechanism by which the diversion from reality facilitated by VR contributes to the diminution of pain and anxiety has yet to be elucidated.However,the provision of positive images through VR-based visual stimulation may enhance the functionality of brain networks.The salience network is diminished,while the default mode network is enhanced.Additionally,the medial prefrontal cortex may establish a stronger connection with the default mode network,which could result in a reduction of pain and anxiety.Further research into the potential of VR technology to alleviate pain could lead to a reduction in the number of individuals who overdose on painkillers and contribute to positive change in the medical field. 展开更多
关键词 Virtual reality PAIN ANXIETY Salience network Default mode network
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A Framework for Multi-Hop Ad-Hoc Networking over Wi-Fi Direct with Android Smart Devices
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作者 Rémy Maxime Mbala Jean Michel Nlong Jean-Robert Kala Kamdjoug 《Communications and Network》 2021年第4期143-158,共16页
The wide diffusion of mobile devices that natively support ad hoc communication technologies has led to several protocols for enabling and optimizing Mobile Ad Hoc Networks (MANETs). Nevertheless, the actual utilizati... The wide diffusion of mobile devices that natively support ad hoc communication technologies has led to several protocols for enabling and optimizing Mobile Ad Hoc Networks (MANETs). Nevertheless, the actual utilization of MANETs in real life seems limited due to the lack of protocols for the automatic creation and evolution of ad hoc networks. Recently, a novel P2P protocol named Wi-Fi Direct has been proposed and standardized by the Wi-Fi Alliance to facilitate nearby devices’ interconnection. Wi-Fi Direct provides high-performance direct communication among devices, includes different energy management mechanisms, and is now available in most Android mobile devices. However, the current implementation of Wi-Fi Direct on Android has several limitations, making the Wi-Fi Direct network only be a one-hop ad-hoc network. This paper aims to develop a new framework for multi-hop ad hoc networking using Wi-Fi Direct in Android smart devices. The framework includes a connection establishment protocol and a group management protocol. Simulations validate the proposed framework on the OMNeT++ simulator. We analyzed the framework by varying transmission range, number of hops, and buffer size. The results indicate that the framework provides an eventual 100% packet delivery for different transmission ranges and hop count values. The buffer size has enough space for all packets. However, as buffer size decreases, the packet delivery decreases proportionally. 展开更多
关键词 wi-fi Direct ANDROID Smart Devices Mobile Ad Hoc network FRAMEWORK Connection Protocol MULTI-HOP Service Discovery
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基于D3QN的Wi-Fi网络智能调制方法
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作者 吴婷婷 方旭明 《物联网学报》 2025年第3期122-131,共10页
速率自适应(RA,rate adaptation)技术是Wi-Fi网络中的关键功能,能够根据实时观测的信道状态选择最优的数据传输速率。然而,现有的大多数速率自适应算法主要存在两个问题:一是依赖跨层信息反馈的方法在实际应用中较难实现;二是所采用的... 速率自适应(RA,rate adaptation)技术是Wi-Fi网络中的关键功能,能够根据实时观测的信道状态选择最优的数据传输速率。然而,现有的大多数速率自适应算法主要存在两个问题:一是依赖跨层信息反馈的方法在实际应用中较难实现;二是所采用的方法在速率选择策略上过于保守,当环境变化信噪比(SNR,signal-to-noise ratio)处于两个可选调制阶数之间时,均选择较低的速率阶数。为了解决这些问题,提出了一种基于深度强化学习中双决斗深度Q网络(D3QN,dueling double deep Q-network)的速率自适应算法,该算法无须进行跨层反馈,通过观测物理层信息来动态调整数据速率,并在奖励函数设计和模型加载阶段参考了现有的查表速率调节方法。仿真结果表明,所提算法相比其他4种基线方法,在不同场景中都能迅速适应环境变化,实现了更高的吞吐量性能。 展开更多
关键词 wi-fi网络 深度强化学习 双决斗深度Q网络 自适应调制
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家庭Wi-Fi组网方案的实验研究:对比分析及应用部署
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作者 寇伟 《计算机时代》 2025年第8期75-80,共6页
本文系统研究了Wi-Fi信号放大技术的物理原理、实现方法与实际应用。经实验测试对原始数据进行对比与分析,有效缓解了家庭场景中Wi-Fi信号电磁波传播衰减、多径效应和干扰等核心问题,为家庭组网提供指导性建议。同时,也可将适合的部署... 本文系统研究了Wi-Fi信号放大技术的物理原理、实现方法与实际应用。经实验测试对原始数据进行对比与分析,有效缓解了家庭场景中Wi-Fi信号电磁波传播衰减、多径效应和干扰等核心问题,为家庭组网提供指导性建议。同时,也可将适合的部署方案迁移至高密度场所、工业物联网及新兴领域。当前主流方案包括中继放大器部署、Mesh网络架构及电力线AP技术(其中,反射装置优化经实验验证效果无效)。未来随着Wi-Fi 7标准的普及及算法的优化,信号放大技术将向智能化、低功耗与高集成度方向持续演进,为6GHz频段应用奠定基础。 展开更多
关键词 wi-fi信号放大 中继放大器 MESH网络 电力线AP wi-fi 7
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