As the scale of urban rail transit(URT)networks expands,the study of URT resilience is essential for safe and efficient operations.This paper presents a comprehensive review of URT resilience and highlights potential ...As the scale of urban rail transit(URT)networks expands,the study of URT resilience is essential for safe and efficient operations.This paper presents a comprehensive review of URT resilience and highlights potential trends and directions for future research.First,URT resilience is defined by three primary abilities:absorption,resistance,and recovery,and four properties:robustness,vulnerability,rapidity,and redundancy.Then,the metrics and assessment approaches for URT resilience were summarized.The metrics are divided into three categories:topology-based,characteristic-based,and performance-based,and the assessment methods are divided into four categories:topological,simulation,optimization,and datadriven.Comparisons of various metrics and assessment approaches revealed that the current research trend in URT resilience is increasingly favoring the integration of traditional methods,such as conventional complex network analysis and operations optimization theory,with new techniques like big data and intelligent computing technology,to accurately assess URT resilience.Finally,five potential trends and directions for future research were identified:analyzing resilience based on multisource data,optimizing train diagram in multiple scenarios,accurate response to passenger demand through new technologies,coupling and optimizing passenger and traffic flows,and optimal line design.展开更多
The construction of integrated energy systems can help improve energy efficiency and promote global energy transi-tion.However,in recent years,the occurrence of extreme natural disasters has brought certain threats to...The construction of integrated energy systems can help improve energy efficiency and promote global energy transi-tion.However,in recent years,the occurrence of extreme natural disasters has brought certain threats to the safe and stable operation of the integrated energy system.Thus,it is necessary to improve the ability of the integrated energy system to resist disasters,reduce disaster losses,and restore energy supply as soon as possible,i.e.,improve its resil-ience.Considering the influence of pre-disaster prevention measures and disaster-time operational measures on sys-tem disaster resilience and the correlation between the two,this paper proposes a system hardening strategy based on three-layer robust optimization.The upper layer formulates the optimal hardening strategy of the system before the disaster event occurs,the middle layer identifies the failed elements in the worst disaster situation,while the lower layer realizes the system operational optimization by coordinating the energy storage charging and discharging plan of each subsystem.The strategy can reduce the total supply shortage of the integrated energy system and improve the flexibility of the system in the pre-disaster prevention and disaster resistance integration stages.展开更多
基金supported by the National Natural Science Foundation of China(72288101,72331001,and 72071015)the Research Grants Council of the Hong Kong Special Administrative Region(PolyU 15222221)+1 种基金the 111 Center(B20071)an XPLORER PRIZE.
文摘As the scale of urban rail transit(URT)networks expands,the study of URT resilience is essential for safe and efficient operations.This paper presents a comprehensive review of URT resilience and highlights potential trends and directions for future research.First,URT resilience is defined by three primary abilities:absorption,resistance,and recovery,and four properties:robustness,vulnerability,rapidity,and redundancy.Then,the metrics and assessment approaches for URT resilience were summarized.The metrics are divided into three categories:topology-based,characteristic-based,and performance-based,and the assessment methods are divided into four categories:topological,simulation,optimization,and datadriven.Comparisons of various metrics and assessment approaches revealed that the current research trend in URT resilience is increasingly favoring the integration of traditional methods,such as conventional complex network analysis and operations optimization theory,with new techniques like big data and intelligent computing technology,to accurately assess URT resilience.Finally,five potential trends and directions for future research were identified:analyzing resilience based on multisource data,optimizing train diagram in multiple scenarios,accurate response to passenger demand through new technologies,coupling and optimizing passenger and traffic flows,and optimal line design.
基金supported in part by Key Project of Shanghai Science and Technology Committee(18DZ1100303).
文摘The construction of integrated energy systems can help improve energy efficiency and promote global energy transi-tion.However,in recent years,the occurrence of extreme natural disasters has brought certain threats to the safe and stable operation of the integrated energy system.Thus,it is necessary to improve the ability of the integrated energy system to resist disasters,reduce disaster losses,and restore energy supply as soon as possible,i.e.,improve its resil-ience.Considering the influence of pre-disaster prevention measures and disaster-time operational measures on sys-tem disaster resilience and the correlation between the two,this paper proposes a system hardening strategy based on three-layer robust optimization.The upper layer formulates the optimal hardening strategy of the system before the disaster event occurs,the middle layer identifies the failed elements in the worst disaster situation,while the lower layer realizes the system operational optimization by coordinating the energy storage charging and discharging plan of each subsystem.The strategy can reduce the total supply shortage of the integrated energy system and improve the flexibility of the system in the pre-disaster prevention and disaster resistance integration stages.
