Results 31 to 40 of about 9,576 (292)

Diffusion Spectrum Imaging Maps Early Axonal Loss and a Unique Progressive Signal in Neuronal Intranuclear Inclusion Disease

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To delineate specific in vivo white matter pathology in neuronal intranuclear inclusion disease (NIID) using diffusion spectrum imaging (DSI) and define its clinical relevance. Methods DSI was performed on 42 NIID patients and 38 matched controls.
Kaiyan Jiang   +10 more
wiley   +1 more source

The application of track deflection measurements made by the video gauge [PDF]

open access: yes, 2018
This paper presents direct track deflection data measured by the Video Gauge (VG), (a Digital Image Correlation method) that is used to remotely determine track stiffness characteristics. Two cases are discussed.
Maria Gallou (1253472)   +3 more
core   +1 more source

Assessing the Impact of Sand-Induced Ballast Fouling on Track Stiffness and Settlement

open access: yesGeotechnics
This study investigates the impact of sand-induced ballast fouling on railway track performance, focusing on track stiffness (modulus), settlement, and overall degradation.
Mohammed A. Alzhrani   +2 more
doaj   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

open access: yesInternational Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam   +2 more
wiley   +1 more source

Review of Trackside Monitoring Solutions: From Strain Gages to Optical Fibre Sensors

open access: yesSensors, 2015
A review of recent research on structural monitoring in railway industry is proposed in this paper, with a special focus on stress-based solutions. After a brief analysis of the mechanical behaviour of ballasted railway tracks, an overview of the most ...
Georges Kouroussis   +5 more
doaj   +1 more source

Dynamic Damage Quantification of Slab Tracks—Finite Element Models on Winkler Soil and Finite-Element Boundary-Element Models on Continuous Soil

open access: yesCivilEng, 2022
Train passages over intact or damaged slab tracks on different soils were calculated by two methods. The finite element method (FEM) uses a Winkler soil under the track model by adding a thin “soil layer”.
Lutz Auersch, Jiaojiao Song
doaj   +1 more source

New sensor for measuring tracking accuracy, tracker vibration, and structural deflection [PDF]

open access: yesAIP Conference Proceedings, 2012
In this paper we describe the development and measurement results of a high accuracy sensor which is able to examine the precision of tracking systems in relation to the sun. Such trackers are used in many concentrator photovoltaic (CPV) applications.
T. Missbach, J. Jaus
openaire   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo   +3 more
wiley   +1 more source

Simulations in the Analysis of Experimental Data Measured by BM@N Drift Chambers

open access: yesEPJ Web of Conferences, 2018
The drift chambers (DCH’s) are an important part of the tracking system of the BM@N experiment designed to study the production of baryonic matter at the Nuclotron energies.
Fedorišin Ján
doaj   +1 more source

Experience in Railway Track Testing for Validation of Theoretical Dynamic Analysis

open access: yesCommunications, 1999
The objective of this paper is to present some experimental approaches in dynamic testing of the railway track structure. The load - deflection track characteristics are particularly important in the design, in the evaluation of serviceability of ...
Milan Moravcik
doaj   +1 more source

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