Results 71 to 80 of about 3,319,079 (328)

Optimisation of railway tamping scheduling

Heliyon
This research was devoted to optimising opportunistic tamping scheduling to present a cost-effective approach that considers both preventive and corrective tamping activities.
Mahdi Khosravi, Alireza Ahmadi, Ahmad Kasraei, Arne Nissen   +3 more
doaj   +1 more source

Monitoring of the Track Geometry Quality Around the Portals of New Tunnel Construction Turecky Vrch - Preliminary Results

Communications, 2014
At the beginning, the contribution deals with the characteristics of conventional structure (track skeleton placed in the ballast) and unconventional structure (slab track) of railway superstructure.
Libor Izvolt, Janka Sestakova, Michal Smalo, Zuzana Gocalova   +3 more
doaj   +1 more source

Optimal opportunistic tamping scheduling for railway track geometry

Structure and Infrastructure Engineering, 2020
This study has been dedicated to the optimization of opportunistic tamping scheduling. The aim of this study has been to schedule tamping activities in such a way that the total maintenance costs and the number of unplanned tamping activities are ...
Hamid Khajehei, M. Haddadzade, A. Ahmadi, I. Soleimanmeigouni, A. Nissen   +4 more
semanticscholar   +1 more source

Does Long‐Term Lower Extremity Strength Training in Adults With Knee Osteoarthritis and Varus Alignment Reduce Knee Joint Loading During Gait?

Arthritis Care &Research, EarlyView.
Objective We examined whether 18 months of strength training in individuals with knee varus alignment and medial tibiofemoral osteoarthritis (OA) reduced knee joint loads during walking compared to an attention control group. Methods This study was a secondary analysis of a randomized clinical trial that compared the effects of strength training to a ...
Stephen P. Messier, Matthew N. Vigliotti, Paige E. Rice, Brian Pietrosimone, Shannon L. Mihalko, Edward H. Ip, Richard F. Loeser, David J. Hunter, Ali Guermazi, Ryan Hill, Santiago Saldana, Kim L. Bennell, Paul DeVita   +12 more
wiley   +1 more source

Deep Learning for Track Quality Evaluation of High-Speed Railway Based on Vehicle-Body Vibration Prediction

IEEE Access, 2019
Track quality evaluation is fundamental for track maintenance. Around the world, track geometry standards are established to evaluate track quality. However, these standards may not be capable of detecting some abnormal track geometry conditions that can
Shuai Ma, Liang Gao, Xiubo Liu, Jing Lin
doaj   +1 more source

Modelling and analysis of FSO ground-to-train communications for straight and curved tracks [PDF]

, 2013
In this work, a free space optical (FSO) link for the ground-to-train communications is proposed. Analytical analysis is carried out for the case of the straight as well as curved rail tracks.
Ghassemlooy, Zabih, Leitgeb, Erich, Paudel, Rupak, Poliak, Juraj   +3 more
core  

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source

A New Approach for Inspection of Selected Geometric Parameters of a Railway Track Using Image-Based Point Clouds

Sensors, 2018
The paper presents the results of testing a proposed image-based point clouds measuring method for geometric parameters determination of a railway track. The study was performed based on a configuration of digital images and reference control network.
Grzegorz Gabara, Piotr Sawicki
doaj   +1 more source

Arching Detection Method of Slab Track in High-Speed Railway Based on Track Geometry Data

Applied Sciences, 2020
During the long-term service of slab track, various external factors (such as complicated temperature) can result in a series of slab damages. Among them, slab arching changes the structural mechanical properties, deteriorates the track geometry ...
Zhuoran Ma, Liang Gao, Yanglong Zhong, Shuai Ma, Bolun An   +4 more
semanticscholar   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source