向可转移的经验价值债券:使经典力场变得有反应性
Alice E A Allen1,2, Gábor Csányi3
1Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
神经网络现在可以使用反应SMILES字符串预测经验价值键 (EVB) 模拟的参数. 这消除了对量子力学计算的需求,使得用经典力场进行反应性原子模拟成为可能.
科学领域:
- 计算化学是一种计算化学.
- 材料科学是一种材料科学.
- 化学物理 化学物理
背景情况:
- 经典力场对于原子学模拟是必不可少的,但对于模拟反应过程却很难.
- 经验价值键 (EVB) 技术将经典力场扩展到反应模拟中.
- EVB需要广泛的参数化,通常涉及计算上昂贵的量子力学计算或每个反应的实验数据.
研究的目的:
- 开发一种使用机器学习预测EVB参数的新方法.
- 为了消除在EVB参数化中需要量子力学计算的需要.
- 为了方便使用经典力场进行反应原子模拟.
主要方法:
- 一个神经网络模型被训练来预测EVB参数.
- 该模型使用SMILES字符串,一种化学符号,来描述化学反应.
- 预测的参数被整合到经典的力场模拟中.
主要成果:
- 神经网络成功地从反应SMILES字符串中预测了EVB参数.
- 这种方法避免了在参数化过程中进行量子力学计算的必要性.
- 该方法证明了使用机器学习用于EVB参数预测的可行性.
结论:
- 已经建立了一种新程序,使反应性原子模拟成为可能.
- 研究人员现在可以利用现有的经典力场进行反应模拟,而无需额外的量子计算.
- 这项工作为计算化学中更容易获得和更有效的反应模拟铺平了道路.
更多相关视频
08:54Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
Published on: January 25, 2020
10:52Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
相关概念视频
Valence Bond Theory
Valence Bond Theory and Hybridized Orbitals
A σ bond (single bond in a Lewis structure) is a covalent bond in which the electron density is...
MO Theory and Covalent Bonding
Introduction to Chemical Bonds
The electrons of the outermost energy level determine the energetic stability of the atom and its tendency to form chemical bonds with other atoms. The innermost electron shell has a maximum capacity of two electrons, but the next two electron shells can each have a maximum of eight electrons. This is known as the octet rule, which states that, with the exception of the innermost shell, atoms are most stable energetically when they have eight electrons in their valence shell, the...
Chemical Bonds
Atoms participate in a chemical bond formation to acquire a completed valence-shell electron configuration similar to that of the noble gas nearest to it in atomic number. Ionic, covalent, and metallic bonds are some of the important types of chemical bonds. Bond energy and bond length determine the strength of a chemical bond.
Types of Chemical Bonds
An ionic bond is formed due to electrostatic attraction between cations and anions. Often, the ions are formed by the transfer of electrons...
VSEPR Theory and the Basic Shapes
