As an open network architecture,Wireless Computing PowerNetworks(WCPN)pose newchallenges for achieving efficient and secure resource management in networks,because of issues such as insecure communication channels and...As an open network architecture,Wireless Computing PowerNetworks(WCPN)pose newchallenges for achieving efficient and secure resource management in networks,because of issues such as insecure communication channels and untrusted device terminals.Blockchain,as a shared,immutable distributed ledger,provides a secure resource management solution for WCPN.However,integrating blockchain into WCPN faces challenges like device heterogeneity,monitoring communication states,and dynamic network nature.Whereas Digital Twins(DT)can accurately maintain digital models of physical entities through real-time data updates and self-learning,enabling continuous optimization of WCPN,improving synchronization performance,ensuring real-time accuracy,and supporting smooth operation of WCPN services.In this paper,we propose a DT for blockchain-empowered WCPN architecture that guarantees real-time data transmission between physical entities and digital models.We adopt an enumeration-based optimal placement algorithm(EOPA)and an improved simulated annealing-based near-optimal placement algorithm(ISAPA)to achieve minimum average DT synchronization latency under the constraint of DT error.Numerical results show that the proposed solution in this paper outperforms benchmarks in terms of average synchronization latency.展开更多
Relying on the construction management of Hangzhouxi Railway Station,this paper analyses the comprehensive application of intelligent construction technology and the establishment of the common data environment(CDE)by...Relying on the construction management of Hangzhouxi Railway Station,this paper analyses the comprehensive application of intelligent construction technology and the establishment of the common data environment(CDE)by using BIM technology.This paper gives the idea that such issues are deeply explored as large-span curved surface structure improvement,steel structure construction monitoring,special-shaped ticket check canopy construction,prefabricated machine room construction,grid construction management,etc.so as to form an intelligent construction management system based on BIM technology.The system has achieved good application results in economic benefits,social benefits and environmental benefits,which can promote the gradual transformation to a more digitalized,networked and intelligent Hangzhouxi Railway Station,and lay a solid foundation for achieving the construction goals of controllable construction period,excellent quality,green and low carbon,etc.展开更多
To meet the needs of building the ATM based compus network, a general plan of ATM MAN is put forward. The traffic control in ATM multiplexing/demultiplexing and MAC Layer and Transmission Convergence (TC) Sublayer of...To meet the needs of building the ATM based compus network, a general plan of ATM MAN is put forward. The traffic control in ATM multiplexing/demultiplexing and MAC Layer and Transmission Convergence (TC) Sublayer of the node is designed. The use of Asynchronous Transfer Mode (ATM) and Synchronous Digital Hierarchy (SDH) techniques into MAN will benefit the transition from MAN to B ISDN and the research in this paper will be useful in establishing ATM MAN or ATM LAN.展开更多
同步数字体系(Synchronous Digital Hierarchy,SDH)光纤传输网在电力通信中扮演着至关重要的角色。光纤传输网凭借其高带宽、大容量以及高可靠性的特性,已成为电力通信的骨干网络技术。该技术支持电力系统的远程控制、实时监测以及灾难...同步数字体系(Synchronous Digital Hierarchy,SDH)光纤传输网在电力通信中扮演着至关重要的角色。光纤传输网凭借其高带宽、大容量以及高可靠性的特性,已成为电力通信的骨干网络技术。该技术支持电力系统的远程控制、实时监测以及灾难恢复等关键功能,显著提高了电力系统的运行效率和服务质量。通过分析SDH技术的基本概念、建设流程及其在电力通信中的应用,揭示SDH光纤传输网对于电力系统稳定运行的重要贡献,并对其未来发展趋势进行展望。展开更多
文章针对基于同步数字体系(Synchronous Digital Hierarchy,SDH)的电力通信网络中的时钟同步机制展开研究与性能评估。通过分析SDH电力通信网络的基础知识和时钟同步需求,设计一种有效的时钟同步机制,并提出相应的同步算法和优化方法。...文章针对基于同步数字体系(Synchronous Digital Hierarchy,SDH)的电力通信网络中的时钟同步机制展开研究与性能评估。通过分析SDH电力通信网络的基础知识和时钟同步需求,设计一种有效的时钟同步机制,并提出相应的同步算法和优化方法。在此基础上,建立评估性能的方法与实验平台,并对实验结果进行深入的分析与评估。通过文章的研究,为提升SDH电力通信网络中时钟同步的性能提供重要参考。展开更多
随着智能电网的迅速发展,通信网络在电力系统中的作用日益重要。同步数字体系(Synchronous Digital Hierarchy,SDH)技术凭借其高带宽、低延迟以及高可靠性,成为智能电网通信的关键技术之一。文章探讨了SDH技术在智能电网中的应用基础,...随着智能电网的迅速发展,通信网络在电力系统中的作用日益重要。同步数字体系(Synchronous Digital Hierarchy,SDH)技术凭借其高带宽、低延迟以及高可靠性,成为智能电网通信的关键技术之一。文章探讨了SDH技术在智能电网中的应用基础,并从网络拓扑优化、带宽资源管理、数据传输效率提升及故障检测与恢复机制等方面提出优化策略,最后分析SDH技术在变电站、电力调度、配电网以及智能电表等通信系统中的应用。展开更多
数字经济发展需要运力和算力共同提升。算力的释放需要以大带宽、广连接、低时延为特征的高性能传输网络。国家对信息通信行业绿色低碳发展提出要求,开展极简传输网络演进势在必行。为此,分析传输网络的现状及问题,提出极简传输网络演...数字经济发展需要运力和算力共同提升。算力的释放需要以大带宽、广连接、低时延为特征的高性能传输网络。国家对信息通信行业绿色低碳发展提出要求,开展极简传输网络演进势在必行。为此,分析传输网络的现状及问题,提出极简传输网络演进的思路和方案,通过省内干线和城域网的同步数字体系(Synchronous Digital Hierarchy,SDH)网络与VC-OTN(Virtual Container-Optical Transport Network)融合演进、分组传送网(Packet Transport Network,PTN)网络与切片分组网(Slicing Packet Network,SPN)网络的融合演进,打造一张高品质、高性能、低碳的极简传输网络。展开更多
随着信息化程度的不断加深,对通信网络的信息传输、交换及处理能力提出了更高的要求。在此背景下,同步数字体系(Synchronous Digital Hierarchy,SDH)技术的应用与网络优化尤为重要。电力通信系统中,SDH技术的引入和网络的持续优化,显著...随着信息化程度的不断加深,对通信网络的信息传输、交换及处理能力提出了更高的要求。在此背景下,同步数字体系(Synchronous Digital Hierarchy,SDH)技术的应用与网络优化尤为重要。电力通信系统中,SDH技术的引入和网络的持续优化,显著提升系统的运行可靠性,同时有效控制信息通信成本。文章简要阐述SDH技术,探讨电力通信中SDH技术的应用,并提出优化SDH的网络结构、优化电力通信系统中的传输设备、优化接口配置等策略,以供参考。展开更多
基金supported by the National Natural Science Foundation of China under Grant 62272391in part by the Key Industry Innovation Chain of Shaanxi under Grant 2021ZDLGY05-08.
文摘As an open network architecture,Wireless Computing PowerNetworks(WCPN)pose newchallenges for achieving efficient and secure resource management in networks,because of issues such as insecure communication channels and untrusted device terminals.Blockchain,as a shared,immutable distributed ledger,provides a secure resource management solution for WCPN.However,integrating blockchain into WCPN faces challenges like device heterogeneity,monitoring communication states,and dynamic network nature.Whereas Digital Twins(DT)can accurately maintain digital models of physical entities through real-time data updates and self-learning,enabling continuous optimization of WCPN,improving synchronization performance,ensuring real-time accuracy,and supporting smooth operation of WCPN services.In this paper,we propose a DT for blockchain-empowered WCPN architecture that guarantees real-time data transmission between physical entities and digital models.We adopt an enumeration-based optimal placement algorithm(EOPA)and an improved simulated annealing-based near-optimal placement algorithm(ISAPA)to achieve minimum average DT synchronization latency under the constraint of DT error.Numerical results show that the proposed solution in this paper outperforms benchmarks in terms of average synchronization latency.
文摘Relying on the construction management of Hangzhouxi Railway Station,this paper analyses the comprehensive application of intelligent construction technology and the establishment of the common data environment(CDE)by using BIM technology.This paper gives the idea that such issues are deeply explored as large-span curved surface structure improvement,steel structure construction monitoring,special-shaped ticket check canopy construction,prefabricated machine room construction,grid construction management,etc.so as to form an intelligent construction management system based on BIM technology.The system has achieved good application results in economic benefits,social benefits and environmental benefits,which can promote the gradual transformation to a more digitalized,networked and intelligent Hangzhouxi Railway Station,and lay a solid foundation for achieving the construction goals of controllable construction period,excellent quality,green and low carbon,etc.
文摘To meet the needs of building the ATM based compus network, a general plan of ATM MAN is put forward. The traffic control in ATM multiplexing/demultiplexing and MAC Layer and Transmission Convergence (TC) Sublayer of the node is designed. The use of Asynchronous Transfer Mode (ATM) and Synchronous Digital Hierarchy (SDH) techniques into MAN will benefit the transition from MAN to B ISDN and the research in this paper will be useful in establishing ATM MAN or ATM LAN.
文摘同步数字体系(Synchronous Digital Hierarchy,SDH)光纤传输网在电力通信中扮演着至关重要的角色。光纤传输网凭借其高带宽、大容量以及高可靠性的特性,已成为电力通信的骨干网络技术。该技术支持电力系统的远程控制、实时监测以及灾难恢复等关键功能,显著提高了电力系统的运行效率和服务质量。通过分析SDH技术的基本概念、建设流程及其在电力通信中的应用,揭示SDH光纤传输网对于电力系统稳定运行的重要贡献,并对其未来发展趋势进行展望。
文摘文章针对基于同步数字体系(Synchronous Digital Hierarchy,SDH)的电力通信网络中的时钟同步机制展开研究与性能评估。通过分析SDH电力通信网络的基础知识和时钟同步需求,设计一种有效的时钟同步机制,并提出相应的同步算法和优化方法。在此基础上,建立评估性能的方法与实验平台,并对实验结果进行深入的分析与评估。通过文章的研究,为提升SDH电力通信网络中时钟同步的性能提供重要参考。
文摘随着智能电网的迅速发展,通信网络在电力系统中的作用日益重要。同步数字体系(Synchronous Digital Hierarchy,SDH)技术凭借其高带宽、低延迟以及高可靠性,成为智能电网通信的关键技术之一。文章探讨了SDH技术在智能电网中的应用基础,并从网络拓扑优化、带宽资源管理、数据传输效率提升及故障检测与恢复机制等方面提出优化策略,最后分析SDH技术在变电站、电力调度、配电网以及智能电表等通信系统中的应用。
文摘数字经济发展需要运力和算力共同提升。算力的释放需要以大带宽、广连接、低时延为特征的高性能传输网络。国家对信息通信行业绿色低碳发展提出要求,开展极简传输网络演进势在必行。为此,分析传输网络的现状及问题,提出极简传输网络演进的思路和方案,通过省内干线和城域网的同步数字体系(Synchronous Digital Hierarchy,SDH)网络与VC-OTN(Virtual Container-Optical Transport Network)融合演进、分组传送网(Packet Transport Network,PTN)网络与切片分组网(Slicing Packet Network,SPN)网络的融合演进,打造一张高品质、高性能、低碳的极简传输网络。
文摘随着信息化程度的不断加深,对通信网络的信息传输、交换及处理能力提出了更高的要求。在此背景下,同步数字体系(Synchronous Digital Hierarchy,SDH)技术的应用与网络优化尤为重要。电力通信系统中,SDH技术的引入和网络的持续优化,显著提升系统的运行可靠性,同时有效控制信息通信成本。文章简要阐述SDH技术,探讨电力通信中SDH技术的应用,并提出优化SDH的网络结构、优化电力通信系统中的传输设备、优化接口配置等策略,以供参考。