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- W2790700814 abstract "We combine the approximate density-functional tight-binding (DFTB) method with unsupervised machine learning. This allows us to improve transferability and accuracy, make use of large quantum chemical data sets for the parametrization, and efficiently automatize the parametrization process of DFTB. For this purpose, generalized pair-potentials are introduced, where the chemical environment is included during the learning process, leading to more specific effective two-body potentials. We train on energies and forces of equilibrium and nonequilibrium structures of 2100 molecules, and test on ∼130 000 organic molecules containing O, N, C, H, and F atoms. Atomization energies of the reference method can be reproduced within an error of ∼2.6 kcal/mol, indicating drastic improvement over standard DFTB." @default.
- W2790700814 created "2018-03-29" @default.
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- W2790700814 date "2018-03-26" @default.
- W2790700814 modified "2023-10-03" @default.
- W2790700814 title "Generalized Density-Functional Tight-Binding Repulsive Potentials from Unsupervised Machine Learning" @default.
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- W2790700814 doi "https://doi.org/10.1021/acs.jctc.7b00933" @default.
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