Results 51 to 60 of about 3,319,079 (328)
Counting Strings, Wound and Bound [PDF]
, 2013 We analyze zero mode counting problems for Dirac operators that find their origin in string theory backgrounds. A first class of quantum mechanical models for which we compute the number of ground states arises from a string winding an isometric ...
Ashok, Sujay K. +2 more
core +2 more sources
Visual Measurement System for Wheel–Rail Lateral Position Evaluation
Sensors, 2021 Railway infrastructure must meet safety requirements concerning its construction and operation. Track geometry monitoring is one of the most important activities in maintaining the steady technical conditions of rail infrastructure.
Viktor Skrickij +5 more
doaj +1 more source
On geometry of tracks in dielectric nuclear track detectors [PDF]
Nuclear Instruments and Methods, 1971 Abstract Dielectric nuclear track detectors are now being utilized in a variety of research applications involving registration of heavily ionizing charged particles. Many situations call for the identification of particle charge Z , energy E , and possibly the mass M 1,2 ).
Henke, R.P., Benton, E.V.
openaire +2 more sources
Fully three-dimensional analysis of high-speed traintracksoil-structure dynamic interaction [PDF]
, 2010 In this paper, a general and fully three dimensional multi-body-finite element-boundary element model, formulated in the time domain to predict vibrations due to train passage at the vehicle, the track and the free field, is presented.
Domínguez Abascal, José +2 more
core +1 more source
Quality Behaviour of Turnouts: Comparison, Problem Specification and Recommendation of Measures
Applied Sciences, 2023 For future requirements, asset management of turnouts needs to rely on data-based assessment tools. These tools must enable the quantification of quality behaviour of turnouts and identify causes of poor behaviour.
Markus Loidolt +5 more
doaj +1 more source
Detection of high-speed railway subsidence and geometry irregularity using terrestrial laser scanning [PDF]
, 2014 Subsidence and geometry deformation monitoring are essential for safe transportation on a high-speed railway. Terrestrial laser scanning (TLS) is able to collect dense three-dimensional point data from the survey scene and achieve highly accurate ...
Li, Nan +3 more
core +1 more source
Performance of a Large-area GEM Detector Read Out with Wide Radial Zigzag Strips
, 2015 A 1-meter-long trapezoidal Triple-GEM detector with wide readout strips was tested in hadron beams at the Fermilab Test Beam Facility in October 2013. The readout strips have a special zigzag geometry and run along the radial direction with an azimuthal ...
Bhopatkar, Vallary +8 more
core +1 more source
Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, 2020 In recent years, significant studies have focused on monitoring the track geometry irregularities through measurements of vehicle dynamics acquired onboard.
Anna De Rosa +6 more
semanticscholar +1 more source
Journal of Materials Research and Technology, 2023 Selective laser melting (SLM) is a common technique categorized as one of the metal Additive Manufacturing (AM) processes to efficiently manufacture complex geometries.
Zhiqiang Yan +7 more
doaj +1 more source
Prediction of railway track geometry defects: a case study
Structure and Infrastructure Engineering, 2020 The aim of this study has been to develop a data-driven analytical methodology for prediction of isolated track geometry defects, based on the measurement data obtained from a field study.
I. Soleimanmeigouni +3 more
semanticscholar +1 more source