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arXiv 2103.03208physics.chem-ph
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基于机器学习的经典分子模拟力场优化

Machine Learning Directed Optimization of Classical Molecular Modeling Force Fields

Bridgette J. Befort, Ryan S. DeFever, Garrett M. Tow, Alexander W. Dowling, Edward J. Maginn

摘要:

精确的力场是预测性分子模拟所必需的。然而,开发精确再现实验性质的力场是具有挑战性的。在这里,我们提出了一种用于力场参数化的机器学习指导的多目标优化工作流程,该工作流程评估了数百万个潜在的力场参数集,同时只需要其中一小部分进行分子模拟测试。我们证明了该方法的一般性,并确定多个低误差参数集两个不同的测试用例:模拟氢氟碳化合物(HFC)的汽液平衡(VLE)和高氯酸铵(AP)的结晶相。我们讨论了我们的力场优化工作流程的挑战和影响。

英文摘要:

Accurate force fields are necessary for predictive molecular simulations. However, developing force fields that accurately reproduce experimental properties is challenging. Here, we present a machine learning directed, multiobjective optimization workflow for force field parameterization that evaluates millions of prospective force field parameter sets while requiring only a small fraction of them to be tested with molecular simulations. We demonstrate the generality of the approach and identify multiple low-error parameter sets for two distinct test cases: simulations of hydrofluorocarbon (HFC) vapor-liquid equilibrium (VLE) and an ammonium perchlorate (AP) crystal phase. We discuss the challenges and implications of our force field optimization workflow.

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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