Automated Diffraction Pattern Analysis for Identifying Crystal Systems Using Multiview Opinion Fusion Machine Learning

Jie Chen, Hengrui Zhang, Carolin B Wahl, Wei Liu, Chad Mirkin, Vinayak Dravid, Daniel W Apley, Wei Chen

Submission Track: Papers

Submission Category: Automated Material Characterization

Keywords: Crystal system, Electron diffraction patterns, Multiview opinion fusion, Machine learning

Abstract: A bottleneck in high-throughput nanomaterials discovery is the pace at which new materials can be structurally characterized. Although current machine learning (ML) methods show promise for the automated processing of electron diffraction patterns (DPs), they fail in high-throughput experiments where DPs are collected from crystals with random orientations. Inspired by the human decision-making process, a framework for automated crystal system classification from DPs with arbitrary orientations was developed. A convolutional neural network was trained using evidential deep learning, and the predictive uncertainties were quantified and leveraged to fuse multiview predictions. Using vector map representations of DPs, the framework achieves an unprecedented testing accuracy of 0.94 in the examples considered, is robust to noise, and retains remarkable accuracy using experimental data. This work highlights the ability of ML be used to accelerate experimental high-throughput materials data analytics.

Submission Number: 2