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of 17
pro vyhledávání: '"Christian Küchler"'
Autor:
Hai Le-The, Christian Küchler, Albert van den Berg, Eberhard Bodenschatz, Detlef Lohse, Dominik Krug
Publikováno v:
Microsystems & Nanoengineering, Vol 7, Iss 1, Pp 1-11 (2021)
Abstract We report a robust fabrication method for patterning freestanding Pt nanowires for use as thermal anemometry probes for small-scale turbulence measurements. Using e-beam lithography, high aspect ratio Pt nanowires (~300 nm width, ~70 µm len
Externí odkaz:
https://doaj.org/article/1d555342cadb4d078bf78b4d362cdb1f
Publikováno v:
New Journal of Physics, Vol 24, Iss 11, p 113010 (2022)
In windy conditions, the air is turbulent. The strong and intermittent velocity variations of turbulence are invisible to flying animals. Nevertheless, flying animals, not much larger than the smallest scales of turbulence, manage to maneuver these h
Externí odkaz:
https://doaj.org/article/a4deaa0a9dbb4a3a88ab024fb6dc141d
Autor:
Christian Küchler, Eberhard Bodenschatz, Detlef Lohse, Albert van den Berg, Hai Le-The, Dominik Krug
Publikováno v:
Microsystems & Nanoengineering, Vol 7, Iss 1, Pp 1-11 (2021)
Microsystems and Nanoengineering, 7(1):28. Nature Publishing Group
Microsystems and Nanoengineering, 7(1):28. Nature Publishing Group
We report a robust fabrication method for patterning free-standing Pt nanowires for the use as thermal anemometry probes for small-scale turbulence measurements. Using e-beam lithography, high aspect ratio Pt nanowires (~300 nm width, ~70 $\mu$m leng
The energy spectrum of incompressible turbulence is known to reveal a pileup of energy at those high wavenumbers where viscous dissipation begins to act. It is called the bottleneck effect. Based on direct numerical simulations of the incompressible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7e9a89072ff6bc06af41740d3ebd6bb
http://arxiv.org/abs/1812.01370
http://arxiv.org/abs/1812.01370
Autor:
Christian Küchler, Stefan Vigerske
Publikováno v:
Optimization. 59:401-415
Publikováno v:
Journal of Industrial & Management Optimization. 4:363-384
Polyhedral discrepancies are relevant for the quantitative stability of mixed-integer two-stage and chance constrained stochastic programs. We study the problem of optimal scenario reduction for a discrete probability distribution with respect to cer
Autor:
Christian Küchler
Publikováno v:
SIAM Journal on Optimization. 19:952-968
We study the quantitative stability of linear multistage stochastic programs under perturbations of the underlying stochastic processes. It is shown that the optimal values behave Lipschitz continuously with respect to an $L^p$-distance. In order to
Autor:
Christian Küchler, Peter Bank
Publikováno v:
Stochastic Processes and their Applications. 117(9):1357-1371
We give a new and comparably short proof of Gittins’ index theorem for dynamic allocation problems of the multi-armed bandit type in continuous time under minimal assumptions. This proof gives a complete characterization of optimal allocation strat
Autor:
Christian Küchler
Publikováno v:
Stability, Approximation, and Decomposition in Two-and Multistage Stochastic Programming ISBN: 9783834809216
Many stochastic optimization problems of practical interest do not allow for an analytic solution, and numerical approaches require the underlying probability measure to have finite support. Whenever the initial probability measure does not meet thes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b135b5ec27db9b6e4d56f1bd912515d6
https://doi.org/10.1007/978-3-8348-9399-4_2
https://doi.org/10.1007/978-3-8348-9399-4_2