Veranstaltungen
- Donnerstag, 23.05.2024, 14:00 Uhr (WIAS-ESH)
- Seminar Numerische Mathematik
Alfonso Caiazzo, WIAS Berlin:
Multiscale modeling of elastic materials & overview of applications in the assimilation of biomedical data
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
Abstrakt
The first part of the talk will describe our recent work concerning the modeling of biphasic tissues composed of an elastic matrix (2D or 3D) and fluid inclusions of co-dimension 2 (0D or 1D, respectively). The model is based on a finite element immersed method where the effect of the fluid is accounted via proper singular terms. The dimensionality reduction is achieved using a reduced Lagrange multipliers formulation of the resulting PDE. The second part of the talk is dedicated to an overview of applications (past, present, and upcoming) in quantitative biomedicine focusing on the role of mathematical modeling and scientific computing for data assimilation problems.
Weitere Informationen
Numerical mathematics seminars
Veranstalter
WIAS Berlin
- Mittwoch, 22.05.2024, 14:15 Uhr (WIAS-ESH)
- Berliner Oberseminar „Nichtlineare partielle Differentialgleichungen” (Langenbach-Seminar)
Prof. Dr. Jürgen Sprekels, WIAS Berlin:
Necessary and sufficient optimality conditions in the sparse optimal control of singular Allen--Cahn systems with dynamic boundary conditions
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
Weitere Informationen
Berliner Oberseminar “Nichtlineare partielle Differentialgleichungen” (Langenbach-Seminar)
Veranstalter
Humboldt-Universität zu Berlin
WIAS Berlin
- Mittwoch, 22.05.2024, 11:30 Uhr (WIAS-405-406)
- Seminar Interacting Random Systems
Emmanuel Jacob, ENS Lyon, Frankreich:
tba
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
Weitere Informationen
Seminar Interacting Random Systems (Online Event)
Veranstalter
WIAS Berlin
- Mittwoch, 22.05.2024, 10:00 Uhr (WIAS-406)
- Forschungsseminar Mathematische Statistik
Prof. Dr. Vladimir Spokoiny, WIAS Berlin:
Gaussian variational inference in high dimension
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Weierstraß-Hörsaal (Raum: 406)
Abstrakt
We consider the problem of approximating a high-dimensional distribution by a Gaussian one by minimizing the Kullback-Leibler divergence. The main result extends Katsevich and Rigollet (2023) and claims that the minimiser can be well approximated by the Gaussian distribution with the mean and variance as for the underlying measure. We also describe the accuracy of approximation and the range of applicability for such approximation in terms of efficient dimension. The obtained results can be used for analysis of various sampling scheme in optimization.
Weitere Informationen
Der Vortrag findet auch via Zoom statt: https://hu-berlin.zoom-x.de/j/69268586742?pwd=bDZJQTk5TGdnUkVCUk9RWGdsWC9vdz09 Meeting-ID: 692 6858 6742, Passwort: 021844
Veranstalter
Humboldt-Universität zu Berlin
Universität Potsdam
WIAS Berlin
- Dienstag, 21.05.2024, 13:30 Uhr (WIAS-ESH)
- Seminar Numerische Mathematik
Dr. Christian Merdon:
Pressure-robustness in Navier--Stokes simulations
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
Veranstalter
WIAS Berlin
- Dienstag, 21.05.2024, 10:15 Uhr (WIAS-ESH)
- Seminar Nichtlineare Optimierung und Inverse Probleme
Dr. Wim van Ackooij, Electricité de France R&D:
A bilevel perspective on optimization with probability constraints
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
Abstrakt
In this talk we will discuss optimization problems involving probability constraints and discuss how in some cases these can be reformulated as bilevel optimization problems. We will show, how under some assumption, an exact penalization scheme can then be set up and derive an algorithm for its solution.
Veranstalter
WIAS Berlin
- Dienstag, 21.05.2024, 09:30 Uhr (WIAS-406)
- Continuation methods
WIAS workshop: Working with continuation methods
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Weierstraß-Hörsaal (Raum: 406)
Abstrakt
The aim of this WIAS workshop is to explore applications and mathematical research topics at WIAS that utilize or further develop continuation methods, particularly in the context of stationary solutions of dynamical systems. This involves the inversion of parameter-dependent nonlinear problems emerging from ODEs, PDEs and delay differential equations. Key aspects of the meeting will include showcasing mathematical research questions, identifying relevant applications, and exploring the development of numerical methods and the use of existing software.
Veranstalter
WIAS Berlin
- 21. – 24. Mai 2024 (ZIB-SEM)
- Workshop/Konferenz: QUANTUM OPTIMAL CONTROL From Mathematical Foundations to Quantum Technologies
mehr ... Veranstaltungsort
Zuse-Zentrum für Informationstechnik (ZIB), Takustr. 7, 14195 Berlin, Seminarraum
Abstrakt
This workshop is part of the Thematic Einstein Semester “Mathematics for Quantum Technologies” (Summer 2024) funded by the Cluster of Excellence MATH+ and the Einstein Foundation Berlin. A central objective of the workshop is to promote an exchange between mathematicians, physicists and engineers across disciplines on the subject of optimal control of quantum systems.
Veranstalter
Freie Universität Berlin
WIAS Berlin
Technische Universität Berlin
Zuse Institute Berlin