Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Christopher G. Albert"'
Autor:
Markus Markl, Philipp Ulbl, Christopher G. Albert, Clemente Angioni, Rico Buchholz, Martin F. Heyn, Sergei V. Kasilov, Winfried Kernbichler, Wolfgang Suttrop, Matthias Willensdorfer, the ASDEX Upgrade Team
Publikováno v:
Nuclear Fusion, Vol 63, Iss 12, p 126007 (2023)
The correlation between the bifurcation of resonant magnetic perturbations (RMPs) to the unshielded state and edge localized mode (ELM) suppression in ASDEX Upgrade is studied using a kinetic plasma response model numerically and analytically. For th
Externí odkaz:
https://doaj.org/article/fc6446b275514d0eb48e84f669cbf6de
Publikováno v:
Entropy, Vol 24, Iss 2, p 231 (2022)
We present a case study for Bayesian analysis and proper representation of distributions and dependence among parameters when calibrating process-oriented environmental models. A simple water quality model for the Elbe River (Germany) is referred to
Externí odkaz:
https://doaj.org/article/4cd5d3e995944ff69a0ffee1f4e694f8
Gaussian Process Regression for Data Fulfilling Linear Differential Equations with Localized Sources
Autor:
Christopher G. Albert, Katharina Rath
Publikováno v:
Entropy, Vol 22, Iss 2, p 152 (2020)
Specialized Gaussian process regression is presented for data that are known to fulfill a given linear differential equation with vanishing or localized sources. The method allows estimation of system parameters as well as strength and location of po
Externí odkaz:
https://doaj.org/article/8f9f319d5347437091b0c80f531cf403
Autor:
Christopher G. Albert
Publikováno v:
Proceedings, Vol 33, Iss 1, p 5 (2019)
A method to reconstruct fields, source strengths and physical parameters based on Gaussian process regression is presented for the case where data are known to fulfill a given linear differential equation with localized sources. The approach is appli
Externí odkaz:
https://doaj.org/article/5ae097b5665141219bec1a94cd946b0f
Autor:
Christopher G. Albert, Rico Buchholz, Sergei V. Kasilov, Winfried Kernbichler, Katharina Rath
Publikováno v:
Journal of Plasma Physics
We present orbit classification schemes for use as fast metrics for fusion alpha particle losses implemented in the symplectic guiding-centre code SIMPLE. Two variants respectively based on conservation of the parallel adiabatic invariant, and topolo
Autor:
Katharina Rath, David Rügamer, Bernd Bischl, Udo von Toussaint, Cristina Rea, Andrew Maris, Robert Granetz, Christopher G. Albert
Publikováno v:
Journal of Plasma Physics
Journal of plasma physics 88(5), 895880502 (2022). doi:10.1017/S0022377822000769
Journal of plasma physics 88(5), 895880502 (2022). doi:10.1017/S0022377822000769
Journal of plasma physics 88(5), 895880502 (2022). doi:10.1017/S0022377822000769
Published by Cambridge Univ. Press, London
Published by Cambridge Univ. Press, London
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a81048ba33810424f920b9009877eb91
https://hdl.handle.net/21.11116/0000-000C-357F-B21.11116/0000-000C-3581-6
https://hdl.handle.net/21.11116/0000-000C-357F-B21.11116/0000-000C-3581-6
Publikováno v:
The 40th International Workshop on Bayesian Inference and Maximum Entropy Methods in Science and Engineering.
Dynamics of many classical physics systems are described in terms of Hamilton’s equations. Commonly, initial conditions are only imperfectly known. The associated volume in phase space is preserved over time due to the symplecticity of the Hamilton
Publikováno v:
Albert, C.; Callies, U.; von Toussaint, U.: Surrogate-Enhanced Parameter Inference for Function-Valued Models. In: Physical Sciences Forum. Vol. 3 Basel: MDPI, 2021. 1, 11. (DOI: /10.3390/psf2021003011)
We present an approach to enhance the performance and flexibility of the Bayesian inference of model parameters based on observations of the measured data. Going beyond the usual surrogate-enhanced Monte-Carlo or optimization methods that focus on a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb06a41bb765343777ed7f63edde9328
https://publications.hzg.de/id/50300
https://publications.hzg.de/id/50300
Publikováno v:
Journal of Plasma Physics
Accelerated statistical computation of collisionless fusion alpha particle losses in stellarator configurations is presented based on direct guiding-centre orbit tracing. The approach relies on the combination of recently developed symplectic integra
Publikováno v:
Physics of Plasmas
A numerical integration method for guiding-center orbits of charged particles in toroidal fusion devices with three-dimensional field geometry is described. Here, high order interpolation of electromagnetic fields in space is replaced by a special li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b95ac83d067b6bd52c5a45a4d9890a3
https://hdl.handle.net/21.11116/0000-0007-CBDB-E21.11116/0000-0007-CBDD-C21.11116/0000-0007-D335-F
https://hdl.handle.net/21.11116/0000-0007-CBDB-E21.11116/0000-0007-CBDD-C21.11116/0000-0007-D335-F