Abstract The aim of this study is to develop coupled matrix formulations characterize the dynamic interaction between vehicle, track, and tunnel. vehicle–track system established in light dynamics theory. physical characteristics mechanical behavior tunnel segments rings are modeled by finite element method, while soil layers vehicle–track–tunnel (VTT) as an assemblage 3-D mapping infinite elem...

Rail joints have a shorter service life than most other railway track components. The discontinuity between rail ends turns the rail joint into a weak spot, and consequently, into a track component demanding more frequent maintenance measures, which result in high maintenance costs. Moreover, difficulties are often found when assessing the damage condition of rail joints since damage conditions...

The goal of sensor fusion is to take observations of an environment from multiple sources and combine them into the best possible track picture. For simplicity, this is usually done by sending all measurements to a single node whose sole task is to fuse measurements into a coherent track picture. This paper introduces a new framework, Distributed Fusion Architecture for Classification and Track...

We show that for every n there are two simple curves on the torus intersecting at least n times without the two curves folding or spiralling with respect to each other. On the other hand, two simple curves in a punctured plane that intersect at least n times (and do not create any empty bigons) must either form a spiral of depth d or a fold of width cn/(d + 1) − 1, where c only depends on the n...

The prevalence and characteristics of mentorship among junior faculty in clinician-scientist and clinician-educator tracks were evaluated. Comprehensive improvement strategies are needed.