Results 31 to 40 of about 20,851 (255)

Reliability Analysis of Switches and Crossings – A Case Study in Swedish Railway [PDF]

International Journal of Railway Research, 2017
It is reported that switches and crossings (S&C) are one of the subsystems that cause the most delays on Swedish Railways while accounting for at least 13% of maintenance costs.
Behzad Ghodrati, Alireza Ahmadi, Diego Galar   +2 more
doaj  

Headway Optimisation for Metro Lines Based on Timetable Simulation and Simulated Annealing

Journal of Advanced Transportation, 2022
To improve the capacity of metro systems, it is important to evaluate and minimise headway, which is defined as the time interval calculated from “head to head” between two successive trains in this paper.
Yong Cui, Qing Yu, Chenyang Wang
doaj   +1 more source

New Insights from Multibody Dynamic Analyses of a Turnout System under Impact Loads

Applied Sciences, 2019
A railway turnout is an essential infrastructure for managing railway traffic flexibility. In contrast, it imposes restrictions on train operations such as lower operational speeds through the turnout due to the complex movements of trains over the ...
Mehmet Hamarat, Sakdirat Kaewunruen, Mayorkinos Papaelias, Mika Silvast   +3 more
doaj   +1 more source

Auto-Resonant Detection Method for Optimized ZVS Operation in IPT Systems With Wide Variation of Magnetic Coupling and Load

IEEE Open Journal of the Industrial Electronics Society, 2021
In wireless charging systems, the H-bridge converter's switching frequency is set close to the system's natural resonance for achieving optimized zero voltage switching (ZVS). Variations to the system's natural resonance are commonly
Francesca Grazian, Thiago Batista Soeiro, Peter J. van Duijsen, Pavol Bauer   +3 more
doaj   +1 more source

Simple realizability of complete abstract topological graphs simplified

, 2019
An abstract topological graph (briefly an AT-graph) is a pair $A=(G,\mathcal{X})$ where $G=(V,E)$ is a graph and $\mathcal{X}\subseteq {E \choose 2}$ is a set of pairs of its edges.
Kynčl, Jan
core   +1 more source

Dynamic Measurement of Switch and Crossing Geometry

Civil-Comp Conferences
The reliability of many switches & crossings plays a vital role in guaranteeing traffic stability. Regular checks on their geometry, particularly specific dimensions, are traditionally done using geometric rulers or via measuring train, that take the above measurements in a ”dynamic” way. However, compared to traditional static techniques, this dynamic
R. Acosta Suñé, P. Fisette, N. Docquier, Sixth International Conference on Railway Technology: Research, Development and Maintenance   +3 more
openaire   +2 more sources

Automated Construction of Mesoscopic Railway Infrastructure Models Supporting Station Throat Capacity Assessment

IEEE Access, 2023
Assessment of the traffic capacity of a rail infrastructure involved within railway stations is one of the basic components of the rail transport planning process.
Petr Vesely, Antonin Kavicka, Pavel Kryze   +2 more
doaj   +1 more source

Controlled parity switch of persistent currents in quantum ladders

, 2017
We investigate the behavior of persistent currents for a fixed number of noninteracting fermions in a periodic quantum ladder threaded by Aharonov-Bohm and transverse magnetic fluxes $\Phi$ and $\chi$.
Bardyn, Charles-Edouard, Filippone, Michele, Giamarchi, Thierry   +2 more
core   +2 more sources

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

96-Channel on-chip reconfigurable optical add-drop multiplexer for multidimensional multiplexing systems

Nanophotonics, 2022
The multi-dimensional multiplexing technology is very promising for further increasing the link capacity of optical interconnects. A 96-channel silicon-based on-chip reconfigurable optical add-drop multiplexer (ROADM) is proposed and demonstrated for the
Zhao Weike, Peng Yingying, Cao Xiaoping, Zhao Shi, Liu Ruoran, Wei Yihui, Liu Dajian, Yi Xiaolin, Han Shangtong, Wan Yuanjian, Li Kang, Wu Guangze, Wang Jian, Shi Yaocheng, Dai Daoxin   +14 more
doaj   +1 more source