Machine learning prediction of self-diffusion in Lennard-Jones fluids.

J Chem Phys

Department of Organic Materials Science, Albuquerque, New Mexico 87185, USA.

Published: July 2020

AI Article Synopsis

  • Different machine learning methods, specifically Random Forest (RF) and Artificial Neural Nets (ANN), were examined to predict self-diffusion in Lennard-Jones fluids using a database from molecular dynamics simulations.
  • The study highlighted the importance of feature engineering in enhancing the performance of the RF models.
  • Ultimately, the ANN models outperformed existing empirical relationships in accurately predicting diffusion in these fluids.

Article Abstract

Different machine learning (ML) methods were explored for the prediction of self-diffusion in Lennard-Jones (LJ) fluids. Using a database of diffusion constants obtained from the molecular dynamics simulation literature, multiple Random Forest (RF) and Artificial Neural Net (ANN) regression models were developed and characterized. The role and improved performance of feature engineering coupled to the RF model development was also addressed. The performance of these different ML models was evaluated by comparing the prediction error to an existing empirical relationship used to describe LJ fluid diffusion. It was found that the ANN regression models provided superior prediction of diffusion in comparison to the existing empirical relationships.

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http://dx.doi.org/10.1063/5.0011512DOI Listing

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