Zobrazeno 1 - 10
of 2 892
pro vyhledávání: '"A. Wollner"'
In this paper we consider the free-form optimization of eigenvalues in electromagnetic systems by means of shape-variations with respect to small deformations. The objective is to optimize a particular eigenvalue to a target value. We introduce the m
Externí odkaz:
http://arxiv.org/abs/2407.11703
Autor:
Simon, Nicolai, Wollner, Winnifried
In this work, we consider optimality conditions of an optimal control problem governed by an obstacle problem. Here, we focus on introducing a, matrix valued, control variable as the coefficients of the obstacle problem. As it is well known, obstacle
Externí odkaz:
http://arxiv.org/abs/2405.20074
Autor:
Uihlein, Andrian, Wollner, Winnifried
Based on techniques by (S.J. Wright 1998) for finite-dimensional optimization, we investigate a stabilized sequential quadratic programming method for nonlinear optimization problems in infinite-dimensional Hilbert spaces. The method is shown to achi
Externí odkaz:
http://arxiv.org/abs/2312.14801
Autor:
Hehl, Andreas, Khimin, Denis, Neitzel, Ira, Simon, Nicolai, Wick, Thomas, Wollner, Winnifried
Within this chapter, we discuss control in the coefficients of an obstacle problem. Utilizing tools from H-convergence, we show existence of optimal solutions. First order necessary optimality conditions are obtained after deriving directional differ
Externí odkaz:
http://arxiv.org/abs/2307.00869
This paper describes a class of shape optimization problems for optical metamaterials comprised of periodic microscale inclusions composed of a dielectric, low-dimensional material suspended in a non-magnetic bulk dielectric. The shape optimization a
Externí odkaz:
http://arxiv.org/abs/2306.13248
Microstructure reconstruction is an important and emerging aspect of computational materials engineering and multiscale modeling and simulation. Despite extensive research and fast progress in the field, the application of descriptor-based reconstruc
Externí odkaz:
http://arxiv.org/abs/2306.08316
Autor:
Wollner, Gregor1 (AUTHOR) gregor.wollner@meduniwien.ac.at, Hruska, Florian1 (AUTHOR), Koenig, Felix R. M.2 (AUTHOR), Haider, Thomas1 (AUTHOR), Negrin, Lukas L.1 (AUTHOR)
Publikováno v:
Journal of Clinical Medicine. Sep2024, Vol. 13 Issue 18, p5557. 9p.
Within this work, we present a novel approach to fracture simulations based on shape optimization techniques. Contrary to widely-used phase-field approaches in literature the proposed method does not require a specified 'length-scale' parameter defin
Externí odkaz:
http://arxiv.org/abs/2210.05502
Within the last years pressure robust methods for the discretization of incompressible fluids have been developed. These methods allow the use of standard finite elements for the solution of the problem while simultaneously removing a spurious pressu
Externí odkaz:
http://arxiv.org/abs/2209.08916
We present a novel method for mixed-integer optimization problems with multivariate and Lipschitz continuous nonlinearities. In particular, we do not assume that the nonlinear constraints are explicitly given but that we can only evaluate them and th
Externí odkaz:
http://arxiv.org/abs/2208.06444