Analysis of urban subway construction collapse disaster chain and research on chain breaking and disaster reduction

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(3), P. e0318269 - e0318269

Published: March 26, 2025

In recent years, China ‘s major cities set off a climax of subway construction, but also brought an endless stream safety accidents. order to analyze the impact evolution process urban construction collapse disaster on residents ‘ life and social economy, by collecting typical cases disaster, combined with chain complex network theory, model is constructed, key node events propagation paths are analyzed. Based this, targeted chain-breaking reduction measures proposed. The results show: can be divided into early, middle late stages evolution. Through destruction collapse, underground pipeline rupture, road damage, affecting lives building damage other nodes or cut → traffic paralysis, technology not standardized equipment failure effects significant. relevant research provide knowledge map for effectively coping identify paths, establish strategies emergency response reduction.

Language: Английский

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Optimizing Metro-Based Logistics Hub Locations for Sustainable Urban Freight Distribution

Sustainability, Journal Year: 2025, Volume and Issue: 17(10), P. 4735 - 4735

Published: May 21, 2025

The fast growth of global e-commerce has made cargo transportation and package delivery more important in cities. However, the limited resources for urban road traffic have logistics distribution less efficient. movement toward green sustainability, energy conservation, emission reduction heightened awareness necessity to enhance mobility transportation. This work further investigates optimization hub locations based on subway systems, informed by research modes current state underground logistics. presents two unique models: a metro-integrated evaluation model location model, aimed at identifying ideal station establishing center with minimal total costs. A heuristic method, jellyfish search algorithm (JS) particular, is carefully explained order find good answer model. From an empirical perspective, district Chaoyang Beijing, China, was taken as case simulate progress metro city hub, minimizing logistical results indicate that system can be used deliveries, proposed method are very useful improving hubs city. Consequently, when facilities allow, we should fully utilize extensive capacity transit efficient, environmentally friendly, sustainable advancement

Language: Английский

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A Robust Optimization Model for Emergency Location Considering the Uncertainty and Correlation of Transportation Network Capacity

Systems, Journal Year: 2024, Volume and Issue: 12(8), P. 277 - 277

Published: July 31, 2024

Emergencies often lead to the impairment of infrastructure systems, including transportation systems. It is necessary analyze uncertainty and correlation network capacity caused by emergencies, aiming at problems emergency facilities’ location matching in contexts. This study introduces novel concepts, such as flow distribution betweenness centrality (FD-BC) transport effect coefficient (TC-EC). Furthermore, we introduce ellipsoidal set characterize uncertainties capacity. We construct a multi-criteria decision-making (MCDM) model multi-strength elitist genetic algorithm (multi-SEGA) ensure lower limit between demand points while minimizing costs. By designing an uncertain scenario example, perturbation ratio level on robust model. The following results were drawn: (1) Indicators FD-BC TC-EC effectively indicated importance each section network. (2) optimal value model’s objective function changed more significantly increased. (3) After reaching certain level, with became conservative than box set, which lacked practical significance. research guarantee robustness support system conditions.

Language: Английский

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Modeling Resilience of Metro-Based Urban Underground Logistics System Based on Multi-Layer Interdependent Network

Sustainability, Journal Year: 2024, Volume and Issue: 16(22), P. 9892 - 9892

Published: Nov. 13, 2024

The metro-based underground logistics system (M-ULS) has been identified as an effective solution to urban problems resulting from the expansion of freight traffic. However, there is a paucity current research that examines resilience M-ULS in context unexpected events during operations. Therefore, this paper presents methodology for assessing M-ULS. method considers propagation paths various failures multi-layered, interdependent network includes topology, functionality, facilities, and information, well performance indicators based on flow timeliness. effectiveness demonstrated using case Nanjing Metro. results show type disruption, duration, direction train travel all have significant impact proposed provides scientific basis assessment optimization also offers new insights into use rail transit promote sustainable development logistics.

Language: Английский

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