Extracting Structural Motifs from Pair Distribution Function Data of Nanostructures Using Explainable Machine Learning
Abstract
Characterization of material structure with X-ray or neutron scattering using e.g. Pair Distribution Function (PDF) analysis most often rely on refining a structure model against an experimental dataset. However, identifying a suitable model is often a bottleneck. Recently, new automated approaches have made it possible to test thousands of models for each dataset, but these methods are computationally expensive, and analysing the output, i.e., extracting structural information from the resulting fits in a meaningful way is challenging. Our Machine Learning based Motif Extractor (ML-MotEx) trains an ML algorithm on thousands of fits, and uses SHAP (SHapley Additive exPlanation) values to identify which model features are important for the fit quality. We use the method for 4 different chemical systems including disordered nanomaterials and clusters. ML-MotEx opens for a new type of modelling where each feature in a model is assigned an importance value for the fit quality based on explainable ML.
Cite
Text
Anker et al. "Extracting Structural Motifs from Pair Distribution Function Data of Nanostructures Using Explainable Machine Learning." NeurIPS 2022 Workshops: AI4Mat, 2022.Markdown
[Anker et al. "Extracting Structural Motifs from Pair Distribution Function Data of Nanostructures Using Explainable Machine Learning." NeurIPS 2022 Workshops: AI4Mat, 2022.](https://mlanthology.org/neuripsw/2022/anker2022neuripsw-extracting/)BibTeX
@inproceedings{anker2022neuripsw-extracting,
title = {{Extracting Structural Motifs from Pair Distribution Function Data of Nanostructures Using Explainable Machine Learning}},
author = {Anker, Andy Sode and Kjær, Emil Thyge Skaaning and Juelsholt, Mikkel and Christiansen, Troels Lindahl and Skjærvø, Susanne Linn and Jørgensen, Mads Ry Vogel and Kantor, Innokenty and Sørensen, Daniel Risskov and Billinge, Simon J. L. and Selvan, Raghavendra and Jensen, Kirsten Marie Ørnsbjerg},
booktitle = {NeurIPS 2022 Workshops: AI4Mat},
year = {2022},
url = {https://mlanthology.org/neuripsw/2022/anker2022neuripsw-extracting/}
}