Results 11 to 20 of about 68,289 (259)
IET Intelligent Transport Systems, 2021 This paper proposes an analytical delay propagation model for single railway lines based on the max‐plus algebra theory. The scheduling measures taken by dispatchers, including re‐timing and re‐ordering, will be incorporated into our delay propagation ...
Junfeng Ma +4 more
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Aerospace, 2023 Complex network theory, in conjunction with metrics able to detect causality relationships from time series, has recently emerged as an effective and intuitive way of studying delay propagation in air transport.
Luisina Pastorino, Massimiliano Zanin
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Data-Driven Modeling of Systemic Air Traffic Delay Propagation: An Epidemic Model Approach
Journal of Advanced Transportation, 2020 To better understand the mechanism of air traffic delay propagation at the system level, an efficient modeling approach based on the epidemic model for delay propagation in airport networks is developed.
Shanmei Li +4 more
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Assessing Interdependencies and Congestion Delays in the Aviation Network
IEEE Access, 2020 Concerning air traffic delays, air transport networks appear to have variable performance and stochastic nature. A delay incident in one airport may affect the operational efficiency of others and generate various side effects to the whole aviation ...
Georgia Lykou +3 more
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A Spatial–Temporal Network Perspective for the Propagation Dynamics of Air Traffic Delays
Engineering, 2021 Intractable delays occur in air traffic due to the imbalance between ever-increasing air traffic demand and limited airspace capacity. As air traffic is associated with complex air transport systems, delays can be magnified and propagated throughout ...
Qing Cai, Sameer Alam, Vu N. Duong
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Aerospace, 2023 Exploring the delay causality between airports and comparing the delay propagation patterns across different airport networks is critical to better understand delay propagation mechanisms and provide effective delay mitigation strategies.
Jiawei Kang +4 more
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Neglecting complex network structures underestimates delays in a large-capital project
Journal of Physics: Complexity, 2023 Completing large-scale projects on time is a daunting challenge, partly due to the intricate network of dependencies between a project’s activities. To support this challenge, existing theory focuses on predicting whether a delay in completing a single ...
C Ellinas, D Avraam, C Nicolaides
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Propagation Delay in the Atmosphere [PDF]
Radio Science, 1972 Calculations of the propagation delay due to the atmosphere in satellite‐to‐earth communication are reported for the frequency range 1 to 15 GHz. A spherically symmetric, smoothly varying model is assumed for the atmosphere, and the techniques of geometrical optics are employed.
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Uncertainty Management at the Airport Transit View
Aerospace, 2018 Air traffic networks, where airports are the nodes that interconnect the entire system, have a time-varying and stochastic nature. An incident in the airport environment may easily propagate through the network and generate system-level effects.
Álvaro Rodríguez-Sanz +4 more
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Stochastic Delay Cost Functions to Estimate Delay Propagation Under Uncertainty
IEEE Access, 2022 We provide a mathematical formulation of flight-specific delay cost functions that enables a detailed tactical consideration of how a given flight delay will interact with all downstream constraints in the respective aircraft rotation.
Jan Evler +3 more
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