Zobrazeno 1 - 10
of 171
pro vyhledávání: '"Andrea Walther"'
Autor:
Olga Weiß, Andrea Walther
Publikováno v:
Surveys in Mathematics and its Applications, Vol 17 (2022), Pp 139-179 (2022)
We investigate optimization problems with a non-smooth partial differential equation as constraint, where the non-smoothness is assumed to be caused by Nemytzkii operators generated by the functions abs, min and max. For the efficient as well as robu
Externí odkaz:
https://doaj.org/article/1f5e9a20611c423fa4dc81c516724481
Autor:
Varadarajan Rengaraj, Sebastian Jost, Franz Bethke, Christian Plessl, Hossein Mirhosseini, Andrea Walther, Thomas D. Kühne
Publikováno v:
Computation, Vol 11, Iss 5, p 95 (2023)
Predicting the chemical stability of yet-to-be-discovered materials is an important aspect of the discovery and development of virtual materials. The conventional approach for computing the enthalpy of formation based on ab initio methods is time con
Externí odkaz:
https://doaj.org/article/cb25653f6c1c4bb3ad00cc7cfb244259
Autor:
Andreas Griewank, Andrea Walther
Publikováno v:
Algorithms, Vol 13, Iss 7, p 166 (2020)
For piecewise linear functions f : R n ↦ R we show how their abs-linear representation can be extended to yield simultaneously their decomposition into a convex f ˇ and a concave part f ^ , including a pair of generalized gradients g ˇ ∈ R n
Externí odkaz:
https://doaj.org/article/ae9e0c1e1dd84ce8980d2d383b89f5f6
Autor:
Davide Ravasio, Silvia Carlin, Teun Boekhout, Marizeth Groenewald, Urska Vrhovsek, Andrea Walther, Jürgen Wendland
Publikováno v:
Fermentation, Vol 4, Iss 1, p 15 (2018)
Fungi produce a variety of volatile organic compounds (VOCs) during their primary and secondary metabolism. In the beverage industry, these volatiles contribute to the the flavor and aroma profile of the final products. We evaluated the fermentation
Externí odkaz:
https://doaj.org/article/2d4c79b203fa4138bb3a6dae12dd3773
Autor:
Benjamin Jurgelucks, Leander Claes, Andrea Walther, Bernd Henning, Veronika Schulze, Lars Meihost, Nadine Feldmann
Publikováno v:
tm - Technisches Messen. 88:294-302
The progress in numerical methods and simulation tools promotes the use of inverse problems in material characterisation problems. A newly developed procedure can be used to identify the behaviour of piezoceramic discs over a wide frequency range usi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbc6b9831adf178cfe0666b07b878809
https://doi.org/10.1515/teme-2020-0096
https://doi.org/10.1515/teme-2020-0096
Publikováno v:
Applicable Analysis. 101:225-240
We present and analyze the solution of nonsmooth optimization problems by a quadratic overestimation method in a function space setting. Under certain assumptions on a suitable local model, we show...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::325b776d583b236c216000d07d628144
https://doi.org/10.1080/00036811.2020.1738397
https://doi.org/10.1080/00036811.2020.1738397
Publikováno v:
International Series of Numerical Mathematics ISBN: 9783030793920
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3af74d1d94fbadafc3d1d20c80d02db7
https://doi.org/10.1007/978-3-030-79393-7_15
https://doi.org/10.1007/978-3-030-79393-7_15
Algorithmic differentiation of an industrial airfoil design tool coupled with the adjoint CFD method
Publikováno v:
Optimization and Engineering. 21:1221-1242
Computer Aided Design (CAD) systems and tools are considered essential for industrial design. They construct and manipulate the geometry of a certain component with an arbitrary set of design parameters. However, it is a challenging task to incorpora
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::266b98779be3d9e87dbcb9f7507002f7
https://doi.org/10.1007/s11081-019-09474-x
https://doi.org/10.1007/s11081-019-09474-x
Autor:
Andreas Griewank, Andrea Walther
Publikováno v:
SIAM Journal on Optimization. 29:1473-1501
Functions defined by evaluation programs involving smooth elementals and absolute values as well as the max and min operators are piecewise smooth. They can be approximated by piecewise linear func...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::154bc8415362df0a3ce7e07122241e9f
https://doi.org/10.1137/17m115520x
https://doi.org/10.1137/17m115520x
Autor:
Andrea Walther, Andreas Griewank
Publikováno v:
SIAM Journal on Optimization. 29:262-289
In the paper [Optim. Methods Softw., 31 (2016), pp. 904--930] we derived first order (KKT) and second order (second order sufficiency condition (SOSC)) optimality conditions for functions defined b...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::715bfb6e06799ce4286f7664c307155c
https://doi.org/10.1137/17m1157623
https://doi.org/10.1137/17m1157623