Results 41 to 50 of about 21,361 (314)
Evaluating rail transit criticism [PDF]
, 2010 This report evaluates criticism of rail transit. It examines claims that rail transit is ineffective at improving transportation system performance, that rail transit investments are not cost effective, and that transit is an outdated form of ...
Litman, Todd
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Fully 3D‐Printed Wave‐Wound Electromagnetic Motors
Advanced Materials Technologies, EarlyView.This work presents the first fully 3D‐printed wave‐wound electromagnetic motors, which are created using conductive nanoparticle inks, carbon‐filled nylon polymers, and surface mount components. These motors can achieve a stall torque of 7.62N·mmA−1$7.62 \nobreakspace N{\cdot }mm A^{-1}$ and efficiency of 28.2 %, which approaches the performance of ...
Joseph Schwalbe +4 more
wiley +1 more source
Method for Evaluating Bolt Competitive Failure Life Under Composite Excitation
Chinese Journal of Mechanical Engineering, 2023 In this study, the competitive failure mechanism of bolt loosening and fatigue is elucidated via competitive failure tests on bolts under composite excitation.
Guangwu Yang +5 more
doaj +1 more source
Effectiveness of rapid rail transit system in Beijing
PLOS ONE, 2017 The effectiveness of rapid rail transit system is analyzed using tools of complex network for the first time. We evaluated the effectiveness of the system in Beijing quantitatively from different perspectives, including descriptive statistics analysis, bridging property, centrality property, ability of connecting different part of the system and ...
Hui-Min Cheng +4 more
openaire +5 more sources
Improving regional passenger rail services [PDF]
, 2014 This report reviews the options available for upgrading existing passenger train services, drawing from local and international case studies to inform the conclusions.
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Contact Force Estimation in the Railway Vehicle Wheel-Rail Interface [PDF]
, 2011 Increased patronage of railways in the UK in the past 20 years has put demands on rolling stock to operate at peak availability with reduced time available for maintenance.
Ward, Christopher P. +10 more
core +1 more source
Waveguide Geometry–Driven Trade‐Offs in Resonant Cavity Sensor Performance
Advanced Optical Materials, EarlyView.Waveguide geometry governs the interplay between sensitivity, intrinsic Q‐factor, and wavelength noise in silicon nitride resonant sensors. Contrary to intuition, higher sensitivity does not ensure superior performance. Low‐noise, high‐Q ridge resonators achieve the lowest detection limits, revealing that detection is ultimately constrained by noise ...
Mohammad Talebi Khoshmehr +6 more
wiley +1 more source
The economics of crowding in rail transit [PDF]
Journal of Urban Economics, 2017 Abstract We model trip-timing decisions of rail transit users who trade off crowding costs and disutility from traveling early or late. With no fare or a uniform fare, ridership is too concentrated on timely trains. Marginal-cost-pricing calls for time-dependent fares that smooth train loads and generate more revenue than an optimal uniform fare. The
de Palma, André +2 more
openaire +2 more sources
A decision support system to improve service quality in multimodal rapid rail systems: A bayesian perspective [PDF]
, 2011 Copyright @ 2011 International Conference on Computers and Industrial EngineeringIn this study, the accessibility of the rail transit stations in a multimodal network formed by a trunk line and its feeder lines are defined. Connectivity between lines and
Aktas, E, Topcu, I, Ugurlu, S
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3D‐Printing Aided Rapid Prototyping of Pretensioned Tensegrity Structures for Robotic Applications
Advanced Robotics Research, EarlyView.Printing, injection molding, and assembly (PMA) is a method for rapid prototyping mesoscale, topologically complex, and tensioned tensegrity structures. In combination with PMA method, two mold design strategies: modular mold and compact channel layout, enable efficiency and scalability for tensegrity fabrication.
Yi Sun +3 more
wiley +1 more source