Results 71 to 80 of about 18,850 (212)
Relative dimension of morphisms and dimension for algebraic stacks
, 2013 Motivated by applications in moduli theory, we introduce a flexible and powerful language for expressing lower bounds on relative dimension of morphisms of schemes, and more generally of algebraic stacks.
Osserman, Brian
core
Journal of Geophysical Research: Oceans, Volume 130, Issue 11, November 2025.Abstract Submesoscale processes are important contributors to the global heat budget and generally support upward heat transport through restratification. However, in salinity‐stratified regions, such as the northern Gulf of Mexico with its influx of freshwater from the Mississippi‐Atchafalaya river system, temperature can act like a passive tracer and
James P. Hilditch +12 more
wiley +1 more source
机车电传动, 2023 The electrified railway catenary generates wind deflection and vibration under wind load. The longitudinal wind deflection affects the current collection quality of the contact wire and the pantograph, and causes contact force fluctuations and pantograph-
CHU Wenping
doaj
Frontiers in Mechanical EngineeringAs train operating speeds increase, the quality of pantograph-catenary current collection deteriorates, sometimes even resulting in contact loss. To ensure stable current collection during high-speed operation, it is crucial to optimize the design ...
Zongfang Zhang, Maoyou Zhang
doaj +1 more source
Study on lifecycle management of high-speed rail catenary system under the MDD-APC theory [PDF]
Railway SciencesPurpose – The rapid development of China’s railway construction has led to an increase in data generated by the high-speed rail (HSR) catenary system. Traditional management methods struggle with challenges such as poor information sharing, disconnected ...
Rui Li, Ping Li, Chenkang Wu, Xue Zhang
doaj +1 more source
Research on Rail Transit Current Receiving Characteristics of Pantograph/Flexible Catenary System
机车电传动, 2016 In order to improve the current receiving quality of pantograph/ flexible catenary system, the pantograph/flexible catenary operation simulation test rig was established to study the influence of rail transit catenary parameters on the contact force of ...
LI Amin +3 more
doaj
Assessment of energy and emissions saving solutions in urban rail-based transport systems [PDF]
, 2019 Global warming and climate change are indisputable theories. Since the Industrial Revolution, the mean temperature of the planet has increased by 1°C. Now, temperatures are approaching a higher stage of +1.5°C and the attention is on both CO2 emissions
Davoudi Zavareh, Mohammad Hassan +1 more
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Evaluation of tramway overhead line system in city of Osijek
MATEC Web of Conferences, 2018 Overhead line system is a vital element of any electrified railway infrastructure. Its performance reflects to all vital parameters such as traction, reliability, availability and safety of railway infrastructure.
Haladin Ivo +2 more
doaj +1 more source
Study of Vehicle Pantograph-catenary Dynamic Performance Based on ADAMS
机车电传动, 2018 Pantograph-catenary dynamics performance determined the current receiving quality. The pantograph-catenary dynamics model was built according to CED160D pantograph and simple chain contacting catenary with ADAMS. The operating state of the train was used
LIU Nan
doaj
Numerical Treatment of Catenary Systems [PDF]
PAMM, 2004 AbstractSimulation is of great importance in the development of railway cable systems. Mathematical models and numerical methods for the computation of both static equilibria and dynamic oscillations of railroad catenaries are being derived. These cable systems form a complex network of string and beam elements and lead to coupled partial differential ...
openaire +1 more source