Searched for: subject:"Degradation"
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document
Sadri, M. (author), Lu, T. (author), Steenbergen, M.J.M.M. (author)
This study addresses the contribution of spatial variance in the railway track support stiffness to the expected long-term track degradation. Hereto, a novel frequency-domain model is developed with a double periodicity ‘layer’, capable of dealing with both sleeper periodicity and arbitrary non-uniformity in track properties. The model...
journal article 2019
document
Lu, G. (author)
Luminous flux maintenance and color stability are two important factors to evaluate the lighting quality. Where a significant amount of research efforts are performed on the former and even some standards have been generated for lumen decay acceleration, research activities and achievements on the latter are lagging behind. DOE Energy Star...
doctoral thesis 2017