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arXiv 2406.00441physics.chem-phcs.AIcs.LG
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神经极化:通过扩展等变网络获取分子电子密度

Neural Polarization: Toward Electron Density for Molecules by Extending Equivariant Networks

Korea Institute of Science and Technology (KIST)(韩国科学技术院)

Bumju Kwak, Jeonghee Jo

AI总结:

针对现有SO(3)等变模型无法表示分子电子密度及低估极化效应的问题,提出Neural Polarization方法,将原子嵌入为固定与移动点对,能提升模型预测性能并增强数学表达能力和等变性。

摘要:

近期的SO(3)等变模型将分子嵌入为三维空间中固定的单个原子集合,类似于球棍模型视图。该视角提供了原子排列的简洁视图,但无法表示周围的电子密度,其极化效应可能被低估。为克服这一局限,我们提出Neural Polarization(神经极化),这是一种通过将每个原子嵌入为固定点和移动点对来扩展等变网络的新方法。受密度泛函理论启发,与球棍模型视图不同,Neural Polarization将分子表示为包含电子密度的空间填充视图。它可灵活应用于大多数现有等变模型类型。我们表明,Neural Polarization能在广泛的目标上提升现有模型的预测性能。最后,我们从数学层面验证了该方法可提高表达能力和等变性。

英文摘要:

Recent SO(3)-equivariant models embedded a molecule as a set of single atoms fixed in the three-dimensional space, which is analogous to a ball-and-stick view. This perspective provides a concise view of atom arrangements, however, the surrounding electron density cannot be represented and its polarization effects may be underestimated. To overcome this limitation, we propose \textit{Neural Polarization}, a novel method extending equivariant network by embedding each atom as a pair of fixed and moving points. Motivated by density functional theory, Neural Polarization represents molecules as a space-filling view which includes an electron density, in contrast with a ball-and-stick view. Neural Polarization can flexibly be applied to most type of existing equivariant models. We showed that Neural Polarization can improve prediction performances of existing models over a wide range of targets. Finally, we verified that our method can improve the expressiveness and equivariance in terms of mathematical aspects.

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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