Roemer_uli

Prof. Dr.-Ing. Ulrich Römer

Contact

work +49 531 391-62120
fax +49 531 391-7017

Work Schleinitzstraße 20
38106 Braunschweig

Parametric uncertainties play an increasingly important role within the simulation based design of electromagnetic components. Input parameters are modeled as random variables taking into account manufacturing imperfections and measurement errors. In this setting, fields are described by stochastic partial differential equations and their modeling and efficient solution is investigated in this research group.

Current research topics

  • Uncertainties in magnetoquasistatic problems with low-frequency applications
  • Modeling of stochastic magnetic materials and discretization techniques
  • Tensor methods for high-dimensional parametric problems
  • Stochastic spectral methods with adjoint error estimators
Jump to: 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010
Number of items: 69.

2019

Duque, David José ; Casper, Thorben ; Schöps, Sebastian ; De Gersem, Herbert ; Römer, Ulrich ; Gillon, Renaud ; Wieers, Aarnout ; Kratochvíl, Tomáš ; Götthans, Tomáš ; Meuris, Peter (2019):
Bond Wire Models.
In: Mathematics in Industry, 29, In: Nanoelectronic Coupled Problems Solutions, pp. 43-68, Cham, Springer, ISBN 978-3-030-30725-7,
DOI: 10.1007/978-3-030-30726-4_3,
[Book Section]

Casper, Thorben ; Römer, Ulrich ; De Gersem, Herbert ; Schöps, Sebastian (2019):
Coupled Simulation of Transient Heat Flow and Electric Currents in Thin Wires: Application to Bond Wires in Microelectronic Chip Packaging.
In: Computers & Mathematics with Applications, ISSN 0898-1221,
DOI: 10.1016/j.camwa.2019.10.009,
[Article]

Georg, Niklas ; Römer, Ulrich ; Schöps, Sebastian
Sievers, Denis (ed.) (2019):
Surrogate Modeling for Optical Gratings based on Polynomial Approximations and Conformal Maps.
30th Workshop on Advances in Electromagnetic Research - KWT 2019, Rietzlern, Austria, 24. August 2019, [Conference or Workshop Item]

Galetzka, Armin ; Bontinck, Zeger ; Römer, Ulrich ; Schöps, Sebastian (2019):
A multilevel Monte Carlo method for high-dimensional uncertainty quantification of low-frequency electromagnetic devices.
In: IEEE Transactions on Magnetics, 55 (8), pp. 1-12. IEEE, ISSN 0018-9464,
DOI: 10.1109/TMAG.2019.2911053,
[Article]

Schmitt, Nikolai ; Georg, Niklas ; Gauthier, Brière ; Loukrezis, Dimitrios ; Héron, Sébastien ; Lanteri, Stéphane ; Klitis, Charalambos ; Sorel, Marc ; Römer, Ulrich ; De Gersem, Herbert ; Vézian, Stéphane ; Genevet, Patrice (2019):
Optimization and uncertainty quantification of gradient index metasurfaces.
In: Optical Materials Express, 9 (2), pp. 892-910. OSA, DOI: 10.1364/OME.9.000892,
[Article]

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert (2019):
Assessing the Performance of Leja and Clenshaw-Curtis Collocation for Computational Electromagnetics with Random Input Data.
In: International Journal for Uncertainty Quantification, 9 (1), pp. 33-57. Begell House, ISSN 2152-5099,
DOI: 10.1615/Int.J.UncertaintyQuantification.2018025234,
[Article]

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian (2019):
Stochastic modeling of magnetic hysteretic properties by using multivariate random fields.
In: International Journal for Uncertainty Quantification, 9 (1), pp. 85-102. Begell House, ISSN 2152-5080,
DOI: 10.1615/Int.J.UncertaintyQuantification.2019025638,
[Article]

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert (2019):
Assessing the Performance of Leja and Clenshaw-Curtis Collocation for Computational Electromagnetics with Random Input Data.
In: International Journal for Uncertainty Quantification, 2019, pp. 1-25. [Article]

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert (2019):
Adaptive Interpolation and Regression Methods for Uncertainty Quantification in Computational Electromagnetics.
3rd International Conference on Uncertainty Quantification in Computational Sciences and Engineering (UNCECOMP 2019), Crete, Greece, 24.-26.06.2019, [Conference or Workshop Item]

2018

Georg, Niklas ; Corno, Jacopo ; De Gersem, Herbert ; Zadeh, Shahnam Gorgi ; Römer, Ulrich ; Schöps, Sebastian ; Sulimov, Alexey ; van Rienen, Ursula (2018):
Uncertainty quantification for the fundamental mode spectrum of the European XFEL Cavities.
13th International Computational Accelerator Physics Conference (ICAP18), [Conference or Workshop Item]

Ion, Ion Gabriel ; Bontinck, Zeger ; Loukrezis, Dimitrios ; Römer, Ulrich ; Lass, Oliver ; Ulbrich, Stefan ; Schöps, Sebastian ; De Gersem, Herbert (2018):
Robust Shape Optimization of Electric Devices Based on Deterministic Optimization Methods and Finite Element Analysis With Affine Decomposition and Design Elements.
In: Electrical Engineering (Archiv für Elektrotechnik), ISSN 1432-0487,
DOI: 10.1007/s00202-018-0716-6,
[Article]

Georg, Niklas ; Loukrezis, Dimitrios ; Römer, Ulrich ; Schöps, Sebastian (2018):
Uncertainty Quantification for an Optical Grating Coupler with Adjoint-based Adaptive Collocation.
Maxwell in Motion, Workshop on Advances in Electromagnetic Research — KWT 2018, Rietzlern, Austria, [Conference or Workshop Item]

Bontinck, Zeger ; Ion, Ion Gabriel ; Loukrezis, Dimitrios ; Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert (2018):
Using Affine Decompositions and Design Elements for Geometric Parametrization.
Maxwell in Motion, Workshop on Advances in Electromagnetic Research — KWT 2018, Rietzlern, Austria, [Conference or Workshop Item]

Georg, Niklas ; Römer, Ulrich ; Schöps, Sebastian ; Schuhmann, Rolf (2018):
Uncertainty Quantification for an Optical Grating Coupler using Adaptive Stochastic Collocation.
SIAM Conference on Uncertainty Quantification 2018, [Conference or Workshop Item]

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian (2018):
Modeling uncertainties in the magnetic hysteresis and their impact on the field quality of a combined function magnet.
11th International Symposium on Electric and Magnetic Fields (EMF 2018), [Conference or Workshop Item]

Ion, Ion Gabriel ; Loukrezis, Dimitrios ; Römer, Ulrich ; Bontinck, Zeger ; Schöps, Sebastian ; Lass, Oliver ; Ulbrich, Stefan ; De Gersem, Herbert (2018):
Shape Optimization of Electric Devices Combining a Deterministic Optimization Method With Design Elements.
11th International Symposium on Electric and Magnetic Fields (EMF 2018), [Conference or Workshop Item]

Loukrezis, Dimitrios ; Römer, Ulrich ; Casper, Thorben ; Schöps, Sebastian ; De Gersem, Herbert (2018):
High Dimensional Uncertainty Quantification for an Electrothermal Field Problem using Stochastic Collocation on Sparse Grids and Tensor Train Decomposition.
In: International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 31 (2), ISSN 1099-1204,
[Article]

Römer, Ulrich ; Clénet, Stéphane ; Schöps, Sebastian (2018):
Duality Based Estimation of Linearization Errors in Stochastic Computations.
München, 89th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM 2018), [Conference or Workshop Item]

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert (2018):
A Hierarchical Interpolation Method for Approximating a Stern-Gerlach Magnet Model with Geometrical Uncertainties.
18th Biennial IEEE Conference on Electromagnetic Field Computation, Hangzhou, China, 28.-31.10.2018, [Conference or Workshop Item]

Ion, Ion Gabriel ; Bontinck, Zeger ; Loukrezis, Dimitrios ; Römer, Ulrich ; Lass, Oliver ; Ulbrich, Stefan ; Schöps, Sebastian ; De Gersem, Herbert (2018):
Robust Shape Optimization of Electric Devices Based on Deterministic Optimization Methods and Finite-Element Analysis with Affine Parametrization and Design Elements.
100, In: Electrical Engineering (Springer Verlag), 2018 (4), pp. 2635-2647. [Article]

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert (2018):
Approximation of Scattering Parameters for Broadband Waveguide Models with Random Inputs using Adaptive Sparse Grids.
Darmstadt, 11th International Symposium on Electric and Magnetic Fields (EMF), Darmstadt, Germany, 10.‐12.04.2018, [Conference or Workshop Item]

Loukrezis, Dimitrios ; Römer, Ulrich ; Casper, Thorben ; Schöps, Sebastian ; De Gersem, Herbert (2018):
High-dimensional uncertainty quantification for an electrothermal field problem using stochastic collocation on sparse grids and tensor train decompositions.
In: International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2018, pp. 1-8. [Article]

Briere, Gauthier ; Genevet, Patrice ; Schmitt, Nikolai ; Lanteri, Stéphane ; Scheid, Claire ; Georg, Niklas ; Loukrezis, Dimitrios ; Römer, Ulrich (2018):
High Efficiency Gradient Index GaN Metasurfaces.
Nanophotonics and Micro/Nano Optics International Conference, Rom, Italy, 01.-03.10.2018, [Conference or Workshop Item]

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert (2018):
Adaptive Sparse Interpolation Methods for Electromagnetic Field Computation with Random Input Data.
2018 SIAM Conference on Uncertainty Quantification, Garden Grove, USA, 16.-19.04.2018, [Conference or Workshop Item]

2017

Bontinck, Zeger ; Corno, Jacopo ; De Gersem, Herbert ; Kurz, Stefan ; Pels, Andreas ; Schöps, Sebastian ; Wolf, Felix ; De Falco, Carlo ; Dölz, Jürgen ; Vázquez, Rafael ; Römer, Ulrich (2017):
Recent Advances of Isogeometric Analysis in Computational Electromagnetics.
In: ICS Newsletter (International Compumag Society), 3, [Article]

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian
Schäfer, Michael (ed.) (2017):
Modeling uncertainties in the magnetic hysteresis and their impact on the field quality of a combined function magnet.
Darmstadt, Germany, 4th International Conference on Computational Engineering (ICCE 2017), Darmstadt, Germany, [Conference or Workshop Item]

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian
Dyczij-Edlinger, Romanus (ed.) (2017):
Determining Bond Wire Temperatures in Electronic Devices by a 1D-3D Coupling Approach.
Miltenberg, URSI Kleinheubacher Tagung (KHB 2017), Miltenberg, [Conference or Workshop Item]

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian
Schäfer, Michael (ed.) (2017):
On the Simulation of Thin Wires in a Coupled 1D-3D Setting.
Darmstadt, Germany, 4th International Conference on Computational Engineering (ICCE 2017), Darmstadt, Germany, [Conference or Workshop Item]

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian (2017):
Modeling Uncertainties in the Magnetic Hysteresis and their Impact on the Field Quality of a Combined Function Magnet.
Workshop on Advances in Electromagnetic Research — KWT 2017, [Conference or Workshop Item]

Georg, Niklas ; Römer, Ulrich ; Schöps, Sebastian (2017):
Uncertainty Quantification for a Plasmon Waveguide using Stochastic Collocation.
Workshop on Advances in Electromagnetic Research — KWT 2017, [Conference or Workshop Item]

Römer, Ulrich ; Schmidt, Christian ; van Rienen, Ursula ; Schöps, Sebastian (2017):
Low-Dimensional Stochastic Modeling of the Electrical Properties of Biological Tissues.
In: IEEE Transactions on Magnetics, 53 (6), pp. 1-4. ISSN 0018-9464,
DOI: 10.1109/TMAG.2017.2668841,
[Article]

Römer, Ulrich ; Casper, Thorben ; Schöps, Sebastian (2017):
Uncertainty Quantification for a Singular Electrothermal Coupled Problem with Error Control.
Rhodes Island, Greece, UNCECOMP 2017, Rhodes Island, Greece, [Conference or Workshop Item]

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian
Jung, Hyun-Kyo (ed.) (2017):
The Impact of Spatial Uncertainties in the Magnetic Reluctivity on the Field Quality of a Combined Function Magnet.
Daejeon, Korea, 21th Conference on the Computation of Electromagnetic Fields, Daejeon, Korea, [Conference or Workshop Item]

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian
Jung, Hyun-Kyo (ed.) (2017):
An Electrothermal 1D-3D Coupling Approach for Thin Wires in Microelectronic Chip Packages.
Daejeon, Korea, 21th Conference on the Computation of Electromagnetic Fields, Daejeon, Korea, [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert (2017):
A Defect Corrected Finite Element Approach for the Accurate Evaluation of Magnetic Fields on Unstructured Grids.
In: Journal of Computational Physics, 335, pp. 688-699. DOI: 10.1016/j.jcp.2017.01.041,
[Article]

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian (2017):
Modeling of Spatial Uncertainties in the Magnetic Reluctivity.
In: COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 36 (4), pp. 1151-1167. ISSN 0332-1649,
[Article]

Galetzka, Armin ; Bontinck, Zeger ; Römer, Ulrich ; Schöps, Sebastian (2017):
Multilevel Monte Carlo Simulation of the Eddy Current Problem With Random Parameters.
In: 2017 International Applied Computational Electromagnetics Society Symposium,
IEEE, 2017 International Applied Computational Electromagnetics Society (ACES) Symposium, [Conference or Workshop Item]

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert (2017):
Leja-Based Adaptive Sparse Grids for High-Dimensional Uncertainty Quantification in Scattering Parameter Simulations.
Proceedings of the 4th International Conference on Computational Engineering, [Conference or Workshop Item]

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert (2017):
Leja-Based Adaptive Sparse Grids for Uncertainty Quantification in High-Frequency Electromagnetics.
Kleinheubacher Berichte, [Conference or Workshop Item]

2016

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian (2016):
Determination of Bond Wire Failure Probabilities in Microelectronic Packages.
pp. 39-44, Budapest, 22nd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC), Budapest, 21-23 Sept. 2016, DOI: 10.1109/THERMINIC.2016.7748645,
[Conference or Workshop Item]

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian
Belahcen, Anouar ; Demenko, Andrzej ; Pietrowski, Wojciech (eds.) (2016):
Stochastic Modeling of an Inhomogeneous Magnetic Reluctivity Using the Karhunen-Loève Expansion and the Hierarchical Matrix Technique.
In: XXIV Symposium Electromagnetic Phenomena in Nonlinear Circuits - Proceedings EPNC 2016, Poznań, PTETiS Publishers, ISBN 978-83-62712-04-05,
[Book Section]

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian (2016):
Efficient Evaluation of Bond Wire Fusing Probabilities.
SIAM Conference on Uncertainty Quantification 2016, [Conference or Workshop Item]

Loukrezis, Dimitrios ; Römer, Ulrich ; Casper, Thorben ; Schöps, Sebastian ; De Gersem, Herbert (2016):
Application of High Dimensional Uncertainty Quantification Methods to Electrothermal Field Problems.
10th International Symposium on Electric and Magnetic Fields (EMF 2016), [Conference or Workshop Item]

Maten, E. Jan W. ter ; Schöps, Sebastian ; Duque, David ; Casper, Thorben ; De Gersem, Herbert ; Römer, Ulrich (2016):
Nanoelectronic COupled problems solutions - nanoCOPS: modelling, multirate, model order reduction, uncertainty quantification, fast fault simulation.
In: Journal of Mathematics in Industry, 7 (2), Springer, ISSN 2190-5983,
[Article]

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2016):
Stochastic Modeling and Regularity of the Nonlinear Elliptic curl-curl Equation.
In: SIAM/ASA Journal on Uncertainty Quantification, 4 (1), pp. 952-979. SIAM, ISSN 2166-2525,
[Article]

2015

Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert (2015):
An Adjoint Approach for Uncertainty Quantification of Magnetoquasistatic Field Problems.
International Conference on Electromagnetics in Advanced Applications (ICEAA) 2015, [Conference or Workshop Item]

Lass, Oliver ; Römer, Ulrich ; Schöps, Sebastian (2015):
Robust Shape Optimization of Accelerator Magnets.
PIERS Progress In Electromagnetics Research Symposium (PIERS) 2015, [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert (2015):
A Defect Correction Scheme for the Accurate Evaluation of Magnetic Fields on Unstructured Grids.
Proceedings of the 20th Conference on the Computation of Electromagnetic Fields, [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2015):
Magnetoquasistatic Simulation with Uncertainties and Applications in Magnet Design.
URSI AT-RASC 2015, [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian (2015):
Stochastic Modeling and Regularity of the Nonlinear Elliptic-Parabolic Magnetoquasistatic Equation.
Lecce, 86th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM 2015), [Conference or Workshop Item]

Römer, Ulrich (2015):
Numerical Approximation of the Magnetoquasistatic Model with Uncertainties and its Application to Magnet Design.
Darmstadt, Technische Universität,
[Ph.D. Thesis]

Römer, Ulrich ; Schöps, Sebastian (2015):
Adjoint Error Estimation for a Pseudo-Spectral Approach to Stochastic Field-Circuit Coupled Problems.
15, In: Proceedings in Applied Mathematics and Mechanics, pp. 711-714, Wiley, [Book Section]

Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert (2015):
An Adjoint Approach for Uncertainty Quantifcation of Magnetoquasistatic Field Problems.
In: Proceedings of the International Conference on Electromagnetics in Advanced Applications, [Book Section]

2014

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2014):
A Spline Based Shape Derivative Approach for the Nonlinear Magnetostatic Interface Problem.
13th International Workshop on Optimization and Inverse Problems in Electromagnetism (OIPE2014), [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2014):
A Defect Correction Method for the Accurate Local Evaluation of Magnetic Fields.
URSI Kleinheubacher Tagung (KHB 2014), [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2014):
Methods for the Quantification of Uncertainties in Nonlinear Material Laws in Electrical Engineering.
6th International Conference on Advanced COmputational Methods in ENgineering (ACOMEN), [Conference or Workshop Item]

Jansen, Lennart ; Römer, Ulrich ; Schöps, Sebastian (2014):
Abstract Differential-Algebraic Equations in Electrical Engineering.
Erlangen-Nürnberg, 85th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM 2014), [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2014):
First Order k-th Moment Analysis for the Nonlinear Eddy Current Problem.
SIAM Conference on Uncertainty Quantification 2014, [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2014):
Approximation of Moments for the Nonlinear Eddy Current Model with Material Uncertainties.
In: IEEE Transactions on Magnetics, 50 (2), [Article]

2013

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2013):
Approaches for the Quantification of Uncertainies in Stochasic Magnet Design.
Beam Dynamics meets Magnets in the EuCARD2 XBEAM-XRING Network, [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2013):
A First Order k-th Moment Method for the Nonlinear Magnetoquasistatics Problem with Material Uncertainties.
Kleinheubacher Tagung 2013, [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2013):
Second Moment Analysis of the Nonlinear Eddy Current Model with Material Uncertainties.
19th International Conference on the Computation of Electromagnetic Fields COMPUMAG, [Conference or Workshop Item]

Klimek, Mariusz ; Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2013):
Discretization of Maxwell Equations in Geometric Algebra Setting.
URSI EMTS 2013, [Conference or Workshop Item]

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2013):
On Uncertainties in Low-Frequency Electromagnetics.
URSI Commission B Workshop, [Conference or Workshop Item]

Klimek, Mariusz ; Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2013):
Space-Time Discretization of Maxwell's Equations in the Setting of Geometric Algebra.
In: Proceedings of the URSI International Symposium on Electromagnetic Theory, pp. 1-24, [Book Section]

Bartel, Andreas ; De Gersem, Herbert ; Hülsmann, Timo ; Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2013):
Quantification of Uncertainty in the Field Quality of Magnets Originating from Material Measurements.
In: IEEE Transactions on Magnetics, 49 (5), pp. 2367-2370. [Article]

2012

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas (2012):
On Uncertainties in Low-Frequency Electromagnetics.
Seminar in Numerical Analysis, [Conference or Workshop Item]

2011

Claßen, Christoph ; Gjonaj, Erion ; Römer, Ulrich ; Schuhmann, Rolf ; Weiland, Thomas (2011):
Modeling of Field Singularities at Dielectric Edges Using Grid Based Methods.
In: Advances in Radio Science, 9, pp. 39-44. [Article]

2010

Römer, Ulrich ; Gjonaj, Erion ; Weiland, Thomas (2010):
A Discontinous Galerkin Method with Locally Singular Basis Functions.
Proceedings of the 10th International Workshop on Finite Elements for Microwave Engineering, [Conference or Workshop Item]

This list was generated on Fri Nov 26 09:50:24 2021 CET.