no code implementations • 29 Jul 2022 • Jakub Rydzewski, Ming Chen, Tushar K. Ghosh, Omar Valsson
Despite routinely circumventing this issue using manifold learning to estimate CVs directly from standard simulations, such methods cannot provide mappings to a low-dimensional manifold from enhanced sampling simulations as the geometry and density of the learned manifold are biased.
no code implementations • 29 Sep 2021 • Jakub Rydzewski, Omar Valsson
Learning representations of physical systems is an important problem at the interface of statistical physics and machine learning.
1 code implementation • 13 Jul 2020 • Jakub Rydzewski, Omar Valsson
We introduce several new advancements to stochastic neighbor embedding methods that make MRSE especially suitable for enhanced sampling simulations: (1) weight-tempered random sampling as a landmark selection scheme to obtain training data sets that strike a balance between equilibrium representation and capturing important metastable states lying higher in free energy; (2) a multiscale representation of the high-dimensional feature space via a Gaussian mixture probability model; and (3) a reweighting procedure to account for training data from a biased probability distribution.
Chemical Physics Computational Physics