Results 21 to 30 of about 99,906 (242)
Ballast bed resistance characteristics based on discrete-element modeling
Advances in Mechanical Engineering, 2018 In this study, in situ experiments were conducted to study the changing characteristics of the lateral and longitudinal resistance of a ballast bed, and a three-dimensional model for the ballast bed and sleeper was constructed based on the discrete ...
Zhiping Zeng +5 more
doaj +1 more source
Eletrônica de Potência, 2008 This paper presents a simple configuration, based on the integration of two flyback converters, to supply high intensity discharge (HID) lamps with a low frequency square waveform (LFSW), in order to avoid the occurrence of the acoustic resonance (AR ...
Tiago B. Marchesan +4 more
doaj +1 more source
A review of test protocols for assessing coating performance of water ballast tank coatings [PDF]
, 2014 Concerns on corrosion and effective coating protection of double hull tankers and bulk carriers in service have been raised especially in water ballast tanks (WBTs).
Guy, Alan +4 more
core +3 more sources
Journal of Marine Science and EngineeringActive substance-based Ballast Water Management Systems (BWMS) can generate disinfection by-products (DBPs) by reacting with dissolved organic matter (DOM). However, current IMO G9-based assessments often overlook qualitative DOM variations.
Hyung-Gon Cha +6 more
doaj +1 more source
Analysis of a typical railway turnout sleeper system using grillage beam analogy [PDF]
, 2012 A simplified grillage beam analogy was performed to investigate the behaviour of railway turnout sleeper system with a low value of elastic modulus on different support moduli.
Aravinthan, Thiru +3 more
core +1 more source
Journal of Marine Science and EngineeringBallast water management systems (BWMSs) using active substances (AS) have been subjected to land-based tests with artificially increased dissolved organic matter (DOM) and cultured species according to the International Maritime Organization G9 ...
Hyung-Gon Cha +6 more
doaj +1 more source
Sampling Methodologies and Approaches for Ballast Water Management Compliance Monitoring
Promet (Zagreb), 2011 The human-mediated transfer of harmful organisms via shipping, especially via ballast water transport, has raised considerable attention especially in the last decade due to the negative associated impacts.
Stephan Gollasch, Matej David
doaj +1 more source
Experimental and Numerical Investigation on Ballast Flight from Perspective of Individual Particles
Applied Sciences, 2019 Ballast flight significantly affects the safe operation of high-speed railway. A wind tunnel experiment and computational fluid dynamics simulation were performed to investigate the occurrence and development mechanism of ballast flight from the ...
Hao Yin, Liang Gao
doaj +1 more source
Applied Sciences, 2017 Transition zones in railway tracks are the locations with considerable changes in vertical support structures, e.g., near bridges. Due to possible water flow constrictions in transition zone structures, there is frequently an increased moisture level in ...
Haoyu Wang +3 more
doaj +1 more source
Analysis of mesoscopic mechanical dynamic characteristics of ballast bed with under sleeper pads
Railway Engineering Science, 2023 The meso-dynamical behaviour of a high-speed rail ballast bed with under sleeper pads (USPs) was studied. The geometrically irregular refined discrete element model of the ballast particles was constructed using 3D scanning techniques, and the 3D dynamic
Xiong Yang +5 more
doaj +1 more source