Changsha urban landscape had been divided into four categories which were background landscape,contour landscape,architectural and humanity landscape,and garden and green landscape in this paper;and components and cha...Changsha urban landscape had been divided into four categories which were background landscape,contour landscape,architectural and humanity landscape,and garden and green landscape in this paper;and components and characteristics of each landscape had been analyzed in detail,which were used in establishment of city identity system of Changsha.Five subsystems had been taken as contexts and their components were analyzed specifically,which were mind indentify system,visual identity system,behavior identity system,audio identity system and environment identity system.Mind identity system would be disintegrated into characteristic landscape system with urban center as the core,surrounded by natural landscape belt and covering historical deposit.Visual identity system would be constituted through application of city flower,city tree,mascot and standard color.Behavior identity system would be disintegrated into capital of entertainment and behavioral custom of old city.Audio identity system would be decomposed into audio identity of urban streets,of natural landscape and of commercial landscape.Environment identity system would be established from the perspective of ecological environment.It was considered that establishment of city identity system of Changsha could directly promote economic development,and it needed further study on city identity system of Changsha.展开更多
In this paper, we first give and prove a geometric identity for distance between any point and mass-points of two mass-points systems in n-dimensional Euclidean space Rn.As its application, we obtain an equality for t...In this paper, we first give and prove a geometric identity for distance between any point and mass-points of two mass-points systems in n-dimensional Euclidean space Rn.As its application, we obtain an equality for two mass-points systems and its radius of the circumscribed sphere and an inequality for distance between mass-points of two mass-points systems and its k-dimensional volume.展开更多
This paper introduces a recursive identification methods toolbox(called RIM) running under Matlab environment for dynamic system identification from available data. The RIM includes many methods which are generally us...This paper introduces a recursive identification methods toolbox(called RIM) running under Matlab environment for dynamic system identification from available data. The RIM includes many methods which are generally used. The RIM helps users to validate the theoretical results and to carry out comparison between identifications methods without the need of algorithms programming. Furthermore, the RIM can be used as an education platform to study the identification parameters effect on model validity and results accuracy. To show its performance and capability, the RIM is evaluated through many application examples.展开更多
针对传统铁路牵引供电系统设备身份认证效率低、故障响应时间长等问题,提出一种基于近场通信(Near Field Communication,NFC)的铁路新型牵引供电系统架构。该架构采用NFC无源标签实现设备全生命周期管理,融合双向认证与动态密钥机制保...针对传统铁路牵引供电系统设备身份认证效率低、故障响应时间长等问题,提出一种基于近场通信(Near Field Communication,NFC)的铁路新型牵引供电系统架构。该架构采用NFC无源标签实现设备全生命周期管理,融合双向认证与动态密钥机制保障数据安全,通过边缘计算节点实现本地化决策。实验结果表明,NFC架构设备识别时间为0.25 s,密钥更新间隔为5 min,电磁干扰下识别率为99.2%,非授权访问拦截率为99.99%,故障预警准确率为92.6%,均优于传统方案。NFC架构在保障信息安全的同时,显著提升了系统可靠性,为智能铁路供电系统建设提供了新思路。展开更多
人员安全在工业信息安全中是极其重要而又常被忽视的一个环节,很多的安全事件和攻击往往源于人员。文章以某企业的工业控制系统信息安全升级项目为背景,基于通过信息安全风险评估识别出的人员安全相关的风险,研究了在分布式控制系统(Dis...人员安全在工业信息安全中是极其重要而又常被忽视的一个环节,很多的安全事件和攻击往往源于人员。文章以某企业的工业控制系统信息安全升级项目为背景,基于通过信息安全风险评估识别出的人员安全相关的风险,研究了在分布式控制系统(Distributed Control System,DCS)信息安全防护建设过程中,在系统安全架构设计时采用零信任理念,选择多因素认证技术实现了基于增强身份治理的零信任架构。项目运行效果证明,零信任架构的应用不仅通过对分布式控制系统的关键资产相关人员进行身份鉴别、访问控制、行为管控和审计等措施加强了人员安全,还配合其他安全防护手段,对系统进行了有效安全防护,并提高了企业的信息安全成熟度。展开更多
文摘Changsha urban landscape had been divided into four categories which were background landscape,contour landscape,architectural and humanity landscape,and garden and green landscape in this paper;and components and characteristics of each landscape had been analyzed in detail,which were used in establishment of city identity system of Changsha.Five subsystems had been taken as contexts and their components were analyzed specifically,which were mind indentify system,visual identity system,behavior identity system,audio identity system and environment identity system.Mind identity system would be disintegrated into characteristic landscape system with urban center as the core,surrounded by natural landscape belt and covering historical deposit.Visual identity system would be constituted through application of city flower,city tree,mascot and standard color.Behavior identity system would be disintegrated into capital of entertainment and behavioral custom of old city.Audio identity system would be decomposed into audio identity of urban streets,of natural landscape and of commercial landscape.Environment identity system would be established from the perspective of ecological environment.It was considered that establishment of city identity system of Changsha could directly promote economic development,and it needed further study on city identity system of Changsha.
文摘In this paper, we first give and prove a geometric identity for distance between any point and mass-points of two mass-points systems in n-dimensional Euclidean space Rn.As its application, we obtain an equality for two mass-points systems and its radius of the circumscribed sphere and an inequality for distance between mass-points of two mass-points systems and its k-dimensional volume.
文摘This paper introduces a recursive identification methods toolbox(called RIM) running under Matlab environment for dynamic system identification from available data. The RIM includes many methods which are generally used. The RIM helps users to validate the theoretical results and to carry out comparison between identifications methods without the need of algorithms programming. Furthermore, the RIM can be used as an education platform to study the identification parameters effect on model validity and results accuracy. To show its performance and capability, the RIM is evaluated through many application examples.
文摘针对传统铁路牵引供电系统设备身份认证效率低、故障响应时间长等问题,提出一种基于近场通信(Near Field Communication,NFC)的铁路新型牵引供电系统架构。该架构采用NFC无源标签实现设备全生命周期管理,融合双向认证与动态密钥机制保障数据安全,通过边缘计算节点实现本地化决策。实验结果表明,NFC架构设备识别时间为0.25 s,密钥更新间隔为5 min,电磁干扰下识别率为99.2%,非授权访问拦截率为99.99%,故障预警准确率为92.6%,均优于传统方案。NFC架构在保障信息安全的同时,显著提升了系统可靠性,为智能铁路供电系统建设提供了新思路。
文摘人员安全在工业信息安全中是极其重要而又常被忽视的一个环节,很多的安全事件和攻击往往源于人员。文章以某企业的工业控制系统信息安全升级项目为背景,基于通过信息安全风险评估识别出的人员安全相关的风险,研究了在分布式控制系统(Distributed Control System,DCS)信息安全防护建设过程中,在系统安全架构设计时采用零信任理念,选择多因素认证技术实现了基于增强身份治理的零信任架构。项目运行效果证明,零信任架构的应用不仅通过对分布式控制系统的关键资产相关人员进行身份鉴别、访问控制、行为管控和审计等措施加强了人员安全,还配合其他安全防护手段,对系统进行了有效安全防护,并提高了企业的信息安全成熟度。
