Results 41 to 50 of about 38,260 (156)
On suspicious tracks: machine-learning based approaches to detect cartels in railway-infrastructure procurement [PDF]
arXiv, 2023 In railway infrastructure, construction and maintenance is typically procured using competitive procedures such as auctions. However, these procedures only fulfill their purpose - using (taxpayers') money efficiently - if bidders do not collude.
arxiv
Modelling railway delay propagation as diffusion-like spreading [PDF]
arXiv, 2021 Railway systems form an important means of transport across the world. However, congestions or disruptions may significantly decrease these systems' efficiencies, making predicting and understanding the resulting train delays a priority for railway organisations.
arxiv
Recent advances in embedded technologies and self‐sensing concrete for structural health monitoring
Structural Concrete, EarlyView.Abstract Fully embedded and spatially diffuse sensors are central to the advancement of civil and construction engineering. Indeed, they serve as an enabling technology necessary for addressing the current challenges associated with through‐life management and structural health monitoring of existing structures and infrastructures. The need to identify
Marco Civera +2 more
wiley +1 more source
Dynamics of active filaments in porous media
, 2019 The motion of active polymers in a porous medium is shown to depend critically on flexibilty, activity and degree of polymerization. For given Peclet number, we observe a transition from localisation to diffusion as the stiffness of the chains is ...
Mokhtari, Zahra, Zippelius, Annette
core +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Mycorrhizal symbiosis, specifically arbuscular mycorrhiza, is one of Earth's oldest and most widespread symbiosis. Existing evidence suggests that plant species differ in their associations with mycorrhizal partners, with different species reported to be always ...
Kadri Koorem +9 more
wiley +1 more source
A Survey on Future Railway Radio Communications Services: Challenges and Opportunities [PDF]
IEEE Communications Magazine, 2015, 2020 Radio communications is one of the most disruptive technologies in railways, enabling a huge set of value-added services that greatly improve many aspects of railways, making them more efficient, safer, and profitable. Lately, some major technologies like ERTMS for high-speed railways and CBTC for subways have made possible a reduction of headway and ...
arxiv
Railway Operation Rescheduling System via Dynamic Simulation and Reinforcement Learning [PDF]
arXiv, 2022 The number of railway service disruptions has been increasing owing to intensification of natural disasters. In addition, abrupt changes in social situations such as the COVID-19 pandemic require railway companies to modify the traffic schedule frequently. Therefore, automatic support for optimal scheduling is anticipated.
arxiv
Sorry for any Inconvenience Caused: Why Britain Messed up High Speed Rail
The Political Quarterly, EarlyView.Abstract High Speed 2—the planned new railway from London to the north of England—is one of the largest and most controversial public sector investment projects Britain has attempted in decades. Much has been written about the huge cost overruns that the project has suffered, and why this led to the eventual cancellation of the line beyond its first ...
Iain Docherty, Jon Shaw
wiley +1 more source
An Optimal Energy Management Algorithm Considering Regenerative Braking and Renewable Energy for EV Charging in Railway Stations [PDF]
arXiv, 2023 This paper proposes a novel optimal Energy Management System (EMS) algorithm for Electric Vehicle (EV) charging in smart electric railway stations with renewable generation. As opposed to previous railway EMS methods, the proposed EMS coordinates the combined Regenerative Braking Energy (RBE), renewable generation, electric railway demand and EV ...
arxiv
Complex delay dynamics on railway networks: from universal laws to realistic modelling [PDF]
EPJ Data Science 2018 7:35, 2017 Railways are a key infrastructure for any modern country. The reliability and resilience of this peculiar transportation system may be challenged by different shocks such as disruptions, strikes and adverse weather conditions. These events compromise the correct functioning of the system and trigger the spreading of delays into the railway network on a
arxiv +1 more source