Results 11 to 20 of about 99,906 (242)
Shear resistance of rubber-ballast composites in simulated water and acid soaked conditions [PDF]
, 2016 Ballast is one of the main structures for the railway tracks. It can resist the lateral movement under dynamic loading transferred by the passing trains with repeatedly.
Chan, Chee Ming, SM Johan, Siti Farhanah
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High frequency electronic ballast provides line frequency lamp current [PDF]
, 2001 Most electronic ballasts for fluorescent lamps provide a sinusoidal lamp current at the switching frequency. The high-frequency current flowing through the lamp can generate significant radiated noise, which is unacceptable in noise-sensitive ...
Santi, Enrico +2 more
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Applied Mechanics, 2023 The article solves the problem of theoretically determining the deformable characteristics of railway ballast, considering its condition through mathematical modeling. Different tasks require mathematical models with different levels of detail of certain
Dmytro Kurhan +3 more
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Thermal Management of Led Luminaires Based on Computational Fluid Dynamic
Eletrônica de Potência, 2015 Large LED (light-emitting diodes) clusters are currently designed to replace the lamps commonly used in parks, roadways, tunnels and street lighting. However, the success of these designs is heavily dependent on the performance of the thermal management.
Odirlan Iaronka +2 more
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A dynamic conductance model of fluorescent lamp for electronic ballast design simulation [PDF]
, 2005 A Spice-compatible dynamic conductance model of a fluorescent lamp for use in electronic ballast simulation is presented. The time-dependent conductance of the fluorescent lamp is derived from a plasma ionization balance equation that uses simplified ...
Devonshire, R. +3 more
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Rapid analysis & design methodologies of High-Frequency LCLC Resonant Inverter as Electrodeless Fluorescent Lamp Ballast [PDF]
, 2007 The papers presents methodologies for the analysis of 4th-order LCLC resonant power converters operating at 2.63 MHz as fluorescent lamp ballasts, where high frequency operation facilitates capacitive discharge into the tube, with near resonance ...
Ang, Y A +3 more
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Integrated Zeta - Flyback Converter To Supply Hid Lamps
Eletrônica de Potência, 2008 This paper proposes a Metal Halide (MH) lamp electronic ballast based on the integration of Zeta and Flyback converters working in discontinuous conduction mode, in order to provide the ballast power factor correction and to stabilize the lamp current ...
Tiago B. Marchesan +3 more
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Aquaculture and Fisheries, 2019 Previous studies have found differences between communities of benthic macroinvertebrates living in constructed tidal flats compared with natural ones.
Junzeng Xue +4 more
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Railway track condition assessment at network level by frequency domain analysis of GPR data [PDF]
, 2018 The railway track system is a crucial infrastructure for the transportation of people and goods in modern societies. With the increase in railway traffic, the availability of the track for monitoring and maintenance purposes is becoming significantly ...
Fontul, Simona +3 more
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Experimental Study on Settlement Behavior of Ballasted Tracks with Polymer Compound-Coated Gravel
Applied Sciences, 2022 The ballast used in ballasted railway tracks transmits load from the rails and ties to the subgrade during train travel, and directly affects the overall track support performance and elastic behavior of the ballasted track.
Jung-Youl Choi
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