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arXiv 2211.15420cond-mat.mtrl-scics.LG
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晶体结构的等变网络

Equivariant Networks for Crystal Structures

McGill University(麦吉尔大学);Mila - Quebec Artificial Intelligence Institute(米拉-魁北克人工智能研究所)

Sékou-Oumar Kaba, Siamak Ravanbakhsh

摘要:

基于深度模型的监督学习在材料科学中具有巨大的应用潜力。最近,图神经网络已被用于这方面,从分子模型中获得直接灵感。然而,材料通常比分子结构化得多,这是这些模型没有利用的特征。在这项工作中,我们介绍了一类模型是等变的结晶对称群。我们通过定义消息传递操作的一般化来实现这一点,这些操作可以与更一般的置换群一起使用,或者可以被视为在晶体图上定义表达卷积操作。从经验上讲,这些模型在属性预测任务上具有最先进的竞争力。

英文摘要:

Supervised learning with deep models has tremendous potential for applications in materials science. Recently, graph neural networks have been used in this context, drawing direct inspiration from models for molecules. However, materials are typically much more structured than molecules, which is a feature that these models do not leverage. In this work, we introduce a class of models that are equivariant with respect to crystalline symmetry groups. We do this by defining a generalization of the message passing operations that can be used with more general permutation groups, or that can alternatively be seen as defining an expressive convolution operation on the crystal graph. Empirically, these models achieve competitive results with state-of-the-art on property prediction tasks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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