no code implementations • 11 Jan 2023 • Johannes G. Hoffer, Sascha Ranftl, Bernhard C. Geiger
We consider the problem of finding an input to a stochastic black box function such that the scalar output of the black box function is as close as possible to a target value in the sense of the expected squared error.
no code implementations • 26 Sep 2022 • Sascha Ranftl
The central limit theorem then suggests that NNs can be constructed to obey a physical law by choosing the activation functions such that they match a particular kernel in the infinite-width limit.
no code implementations • 21 Feb 2022 • Sascha Ranftl, Malte Rolf-Pissarczyk, Gloria Wolkerstorfer, Antonio Pepe, Jan Egger, Wolfgang von der Linden, Gerhard A. Holzapfel
Then to assess the uncertainty in the output stress distribution due to this stochastic constitutive model, a convolutional neural network, specifically a Bayesian encoder-decoder, was used as a surrogate model that maps the random input fields to the output stress distribution obtained from the FE analysis.
no code implementations • 11 Jan 2021 • Sascha Ranftl, Wolfgang von der Linden
In the process, the contribution of the uncertainties of the surrogate itself to the simulation output uncertainties are usually neglected.
Methodology Data Analysis, Statistics and Probability