数据集在机器学习原子间潜能算法之间的可转移性
Samuel P Niblett1, Panagiotis Kourtis2, Ioan-Bogdan Magdău2
1Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
Journal of chemical theory and computation
|June 5, 2025
概括
在机器学习模型之间传输训练数据加速了基础机器学习原子间潜力 (FMLIP) 的发展. 虽然人为设计的数据集传输很好,但自动生成的数据集没有,这突显了需要系统特定数据来进行准确的分子模拟的需要.
科学领域:
- 计算化学的计算化学
- 材料科学 材料科学 材料科学
- 机器学习 机器学习
背景情况:
- 基础机器学习原子间潜力 (FMLIP) 模型需要大量的数据进行训练.
- 在不同的机器学习 (ML) 架构之间传输数据可以加速模型微调.
- 优化一个ML方法的训练数据,并将其用于另一个方法,可以减少昂贵的代训练.
研究的目的:
- 检查FMLIP不同ML架构之间的训练数据的可重复使用性.
- 评估训练数据配置对各种ML算法的模型性能的影响.
- 用最小的计算力度为分子液体模型提供增强训练集的原则.
主要方法:
- 在feedforward神经网络 (深潜在模型) 和消息传递网络 (MACE) 之间比较训练数据的可传输性.
- 使用普通电池电解质溶剂作为测试案例.
- 提出并应用一个简单的指标来评估模型性能和概括性.
主要成果:
- 即使使用简单的训练集,MACE模型也表现出良好的性能,与需要代训练的简单架构不同.
- 人类直观的数据配置在算法之间有效地传输,而自动生成的配置没有.
- 与预训练的FMLIP相比,系统特定的培训数据被证明是实现现实的模型性能所必需的.
- 对于微小的分子形状变化,模型稳定性保持不变,但对于功能化学的变化,则没有.
结论:
- 训练数据属性显著影响MLIP的行为.
- 战略数据集增强可以加速使用FMLIPs模拟新的化学系统.
- 仔细考虑数据可转移性和系统特异性对于高效准确的MLIP开发至关重要.
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