Intelligent electronic devices(IEDs)are interconnected via communication networks and play pivotal roles in transmitting grid-related operational data and executing control instructions.In the context of the heightene...Intelligent electronic devices(IEDs)are interconnected via communication networks and play pivotal roles in transmitting grid-related operational data and executing control instructions.In the context of the heightened security challenges within smart grids,IEDs pose significant risks due to inherent hardware and software vulner-abilities,as well as the openness and vulnerability of communication protocols.Smart grid security,distinct from traditional internet security,mainly relies on monitoring network security events at the platform layer,lacking an effective assessment mechanism for IEDs.Hence,we incorporate considerations for both cyber-attacks and physical faults,presenting security assessment indicators and methods specifically tailored for IEDs.Initially,we outline the security monitoring technology for IEDs,considering the necessary data sources for their security assessment.Subsequently,we classify IEDs and establish a comprehensive security monitoring index system,incorporating factors such as running states,network traffic,and abnormal behaviors.This index system contains 18 indicators in 3 categories.Additionally,we elucidate quantitative methods for various indicators and propose a hybrid security assessment method known as GRCW-hybrid,combining grey relational analysis(GRA),analytic hierarchy process(AHP),and entropy weight method(EWM).According to the proposed assessment method,the security risk level of IEDs can be graded into 6 levels,namely 0,1,2,3,4,and 5.The higher the level,the greater the security risk.Finally,we assess and simulate 15 scenarios in 3 categories,which are based on monitoring indicators and real-world situations encountered by IEDs.The results show that calculated security risk level based on the proposed assessment method are consistent with actual simulation.Thus,the reasonableness and effectiveness of the proposed index system and assessment method are validated.展开更多
Terms of intelligence in 20th and 21th century mean the methods of automatic extraction, analysis, interpretation and use of information. Thus, the intelligence services in the future created an electronic database in...Terms of intelligence in 20th and 21th century mean the methods of automatic extraction, analysis, interpretation and use of information. Thus, the intelligence services in the future created an electronic database in which to their being classified intelligence products, users could choose between the latter themselves relevant information. The EU （European Union） that activities are carried out from at least in year 1996, terrorist attacks in year 200l is only accelerating. Proposals to increase surveillance and international cooperation in this field have been drawn up before September 11 2011. On the Web you can fmd a list of networks （Cryptome, 2011）, which could be connected, or are under the control of the security service--NSA （National Security Agency）. United States of America in year 1994 enacted a law for telephone communication--Digital Telephony Act, which would require manufacturers of telecommunications equipment, leaving some security holes for control. In addition, we monitor the Internet and large corporations. The example of the United States of America in this action reveals the organization for electronic freedoms against a telecom company that the NSA illegally gains access to data on information technology users and Internet telephony.展开更多
针对轨道交通行业发展特点、前景以及用户需求,分析车载广播系统中的LED显示设备的硬件设计和软件框架设计,并对LED显示设备在数字型乘客信息系统(Passenger Information System,PIS)平台上的研发方向进行简要分析和展望。基于STM32H74...针对轨道交通行业发展特点、前景以及用户需求,分析车载广播系统中的LED显示设备的硬件设计和软件框架设计,并对LED显示设备在数字型乘客信息系统(Passenger Information System,PIS)平台上的研发方向进行简要分析和展望。基于STM32H743芯片设计轨道交通车载LED显示屏,通过乘客信息系统的PTU软件实现文本信息更新、网络升级、故障自检等功能,降低运维人力成本和系统故障率。展开更多
Smart wearable textilesintegrating micro/nano electronics into fibers/garments represent state-of-the-art wearable technology and show great potential applications in healthcare,smart city,intelligent robotics,etc.[1]...Smart wearable textilesintegrating micro/nano electronics into fibers/garments represent state-of-the-art wearable technology and show great potential applications in healthcare,smart city,intelligent robotics,etc.[1]To this end,wearable nanosensors,logic circuits,electronic skin,flexible batteries,etc.,are incorporated into fabrics to create stretchable and wearable e-textiles.展开更多
Flexible and wearable electronics represent paramount technologies ofering revolutionized solutions for medical diagnosis and therapy,nerve and organ interfaces,fabric computation,robot-in-medicine and metaverse.Being...Flexible and wearable electronics represent paramount technologies ofering revolutionized solutions for medical diagnosis and therapy,nerve and organ interfaces,fabric computation,robot-in-medicine and metaverse.Being ubiquitous in everyday life,piezoelectric materials and devices play a vital role in fexible and wearable electronics with their intriguing functionalities,including energy harvesting,sensing and actuation,personal health care and communications.As a new emerging fexible and wearable technology,fber-shaped piezoelectric devices ofer unique advantages over conventional thin-flm counterparts.In this review,we survey the recent scientifc and technological breakthroughs in thermally drawn piezoelectric fbers and fber-enabled intelligent fabrics.We highlight the fber materials,fber architecture,fabrication,device integration as well as functions that deliver higher forms of unique applications across smart sensing,health care,space security,actuation and energy domains.We conclude with a critical analysis of existing challenges and opportunities that will be important for the continued progress of this feld.展开更多
针对诊断设备无备用、特征参量单一导致变电设备故障诊断可靠性和准确性较低的问题,研究了一种基于云平台的变电站设备智能诊断系统。该系统由智能传感器、诊断云平台和变电站中心控制站组成。智能传感器采集设备的实时状态数据并传输...针对诊断设备无备用、特征参量单一导致变电设备故障诊断可靠性和准确性较低的问题,研究了一种基于云平台的变电站设备智能诊断系统。该系统由智能传感器、诊断云平台和变电站中心控制站组成。智能传感器采集设备的实时状态数据并传输至云平台;云平台由智能电子设备(intelligent electronic device,IED)组成,根据任务调度原则合理分配云平台计算资源,融合初步故障诊断信息,实现故障协同诊断和诊断结果分层存储;变电站中心控制站调用高级诊断方法进一步确认故障,发出报警和维修信号。某220 k V变压器状态监测实例表明,与传统变电站诊断系统相比,该系统使IED互为冗余备用,充分利用云平台资源,并行分析状态数据,使诊断时间缩短约40.11%,提高了故障诊断的可靠性。展开更多
基金The financial support from the Program for Science and Technology of Henan Province of China(Grant No.242102210148)Henan Center for Outstanding Overseas Scientists(Grant No.GZS2022011)Songshan Laboratory Pre-Research Project(Grant No.YYJC032022022).
文摘Intelligent electronic devices(IEDs)are interconnected via communication networks and play pivotal roles in transmitting grid-related operational data and executing control instructions.In the context of the heightened security challenges within smart grids,IEDs pose significant risks due to inherent hardware and software vulner-abilities,as well as the openness and vulnerability of communication protocols.Smart grid security,distinct from traditional internet security,mainly relies on monitoring network security events at the platform layer,lacking an effective assessment mechanism for IEDs.Hence,we incorporate considerations for both cyber-attacks and physical faults,presenting security assessment indicators and methods specifically tailored for IEDs.Initially,we outline the security monitoring technology for IEDs,considering the necessary data sources for their security assessment.Subsequently,we classify IEDs and establish a comprehensive security monitoring index system,incorporating factors such as running states,network traffic,and abnormal behaviors.This index system contains 18 indicators in 3 categories.Additionally,we elucidate quantitative methods for various indicators and propose a hybrid security assessment method known as GRCW-hybrid,combining grey relational analysis(GRA),analytic hierarchy process(AHP),and entropy weight method(EWM).According to the proposed assessment method,the security risk level of IEDs can be graded into 6 levels,namely 0,1,2,3,4,and 5.The higher the level,the greater the security risk.Finally,we assess and simulate 15 scenarios in 3 categories,which are based on monitoring indicators and real-world situations encountered by IEDs.The results show that calculated security risk level based on the proposed assessment method are consistent with actual simulation.Thus,the reasonableness and effectiveness of the proposed index system and assessment method are validated.
文摘Terms of intelligence in 20th and 21th century mean the methods of automatic extraction, analysis, interpretation and use of information. Thus, the intelligence services in the future created an electronic database in which to their being classified intelligence products, users could choose between the latter themselves relevant information. The EU （European Union） that activities are carried out from at least in year 1996, terrorist attacks in year 200l is only accelerating. Proposals to increase surveillance and international cooperation in this field have been drawn up before September 11 2011. On the Web you can fmd a list of networks （Cryptome, 2011）, which could be connected, or are under the control of the security service--NSA （National Security Agency）. United States of America in year 1994 enacted a law for telephone communication--Digital Telephony Act, which would require manufacturers of telecommunications equipment, leaving some security holes for control. In addition, we monitor the Internet and large corporations. The example of the United States of America in this action reveals the organization for electronic freedoms against a telecom company that the NSA illegally gains access to data on information technology users and Internet telephony.
文摘针对轨道交通行业发展特点、前景以及用户需求,分析车载广播系统中的LED显示设备的硬件设计和软件框架设计,并对LED显示设备在数字型乘客信息系统(Passenger Information System,PIS)平台上的研发方向进行简要分析和展望。基于STM32H743芯片设计轨道交通车载LED显示屏,通过乘客信息系统的PTU软件实现文本信息更新、网络升级、故障自检等功能,降低运维人力成本和系统故障率。
基金National Natural Science Foundation of China,Grant/Award Numbers:52203226,52303054。
文摘Smart wearable textilesintegrating micro/nano electronics into fibers/garments represent state-of-the-art wearable technology and show great potential applications in healthcare,smart city,intelligent robotics,etc.[1]To this end,wearable nanosensors,logic circuits,electronic skin,flexible batteries,etc.,are incorporated into fabrics to create stretchable and wearable e-textiles.
基金supported by Nanyang Technological University(021850-00001:Wei Yan)the National Natural Science Foundation of China(Grant No.52202167).
文摘Flexible and wearable electronics represent paramount technologies ofering revolutionized solutions for medical diagnosis and therapy,nerve and organ interfaces,fabric computation,robot-in-medicine and metaverse.Being ubiquitous in everyday life,piezoelectric materials and devices play a vital role in fexible and wearable electronics with their intriguing functionalities,including energy harvesting,sensing and actuation,personal health care and communications.As a new emerging fexible and wearable technology,fber-shaped piezoelectric devices ofer unique advantages over conventional thin-flm counterparts.In this review,we survey the recent scientifc and technological breakthroughs in thermally drawn piezoelectric fbers and fber-enabled intelligent fabrics.We highlight the fber materials,fber architecture,fabrication,device integration as well as functions that deliver higher forms of unique applications across smart sensing,health care,space security,actuation and energy domains.We conclude with a critical analysis of existing challenges and opportunities that will be important for the continued progress of this feld.
文摘针对诊断设备无备用、特征参量单一导致变电设备故障诊断可靠性和准确性较低的问题,研究了一种基于云平台的变电站设备智能诊断系统。该系统由智能传感器、诊断云平台和变电站中心控制站组成。智能传感器采集设备的实时状态数据并传输至云平台;云平台由智能电子设备(intelligent electronic device,IED)组成,根据任务调度原则合理分配云平台计算资源,融合初步故障诊断信息,实现故障协同诊断和诊断结果分层存储;变电站中心控制站调用高级诊断方法进一步确认故障,发出报警和维修信号。某220 k V变压器状态监测实例表明,与传统变电站诊断系统相比,该系统使IED互为冗余备用,充分利用云平台资源,并行分析状态数据,使诊断时间缩短约40.11%,提高了故障诊断的可靠性。
