可转移和透明的基于能量分解的机器学习模型用于计算精确的反应动力学
Carlos R Jacinto-Mejía1, Loriano Storchi2, Giovanni Bistoni1
1Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia 06123, Italy.
Journal of chemical theory and computation
|October 29, 2025
概括
本研究介绍了一种机器学习框架,以改善密度函数理论 (DFT) 的反应能量. 该方法使用能量分解和线性回归,大大提高了准确性并保持了可解释性.
科学领域:
- 计算化学计算化学
- 机器学习在化学中的应用
- 量子化学 是一个量子化学.
背景情况:
- 密度函数理论 (DFT) 广泛用于化学反应能量计算.
- 标准的DFT方法可能受到精度限制.
- 提高这些计算的精度对于预测化学行为至关重要.
研究的目的:
- 开发一个机器学习框架,以提高DFT反应能量精度.
- 创造一种可转移,可解释和模块化的方法.
- 为标准的DFT和复杂的神经网络提供强大的替代方案.
主要方法:
- 将DFT反应能量分解为具有物理意义的,化学直观的贡献.
- 训练使用这些分解能描述器的线性回归 (LR) 模型.
- 使用随机森林 (RF) 分类器来动态选择最佳的LR模型.
- 使用具有物理意义的能量分解描述符.
主要成果:
- 与未经纠正的DFT相比,一个通用LR模型可将平均绝对百分比误差 (MAPE) 降低高达63%.
- 专门的LR模型进一步提高了特定反应类型的准确性.
- 无线电/无线电管道实现了高达123个百分点的MAPE减少.
- 该框架在分布之外的数据上表现出强的表现,包括过渡金属复合物.
结论:
- 开发的机器学习框架显著提高了DFT反应能量精度.
- 该方法是可转移的,可解释的,并且在未见的数据上保持性能.
- 该方法为准确的化学反应能量预测提供了可靠和可解释的替代方案.
相关概念视频
Energy Transfer in Chemical Reactions
10.6K
Chemical reactions require sufficient energy to cause the matter to collide with enough precision and force that old chemical bonds can be broken and new ones formed. In general, kinetic energy is the form of energy powering any type of matter in motion. Imagine a person building a brick wall. The energy it takes to lift and place one brick on top of another is the kinetic energy—the energy matter possesses because of its motion. Once the wall is in place, it stores potential energy.
10.6K
Energy Diagrams, Transition States, and Intermediates
19.9K
Free-energy diagrams, or reaction coordinate diagrams, are graphs showing the energy changes that occur during a chemical reaction. The reaction coordinate represented on the horizontal axis shows how far the reaction has progressed structurally. Positions along the x-axis close to the reactants have structures resembling the reactants, while positions close to the products resemble the products. Peaks on the energy diagram represent stable structures with measurable lifetimes, while...
19.9K
Predicting Reaction Outcomes
10.0K
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
10.0K
An Introduction to Free Energy
10.8K
How can we compare the energy that releases from one reaction to that of another reaction? We use a measurement of free energy to quantitate these energy transfers. Scientists call this free energy Gibbs free energy (abbreviated with the letter G) after Josiah Willard Gibbs, the scientist who developed the measurement. According to the second law of thermodynamics, all energy transfers involve losing some energy in an unusable form such as heat, resulting in entropy. Gibbs free energy...
10.8K
Activation Energy
86.2K
Activation energy is the minimum amount of energy necessary for a chemical reaction to move forward. The higher the activation energy, the slower the rate of the reaction. However, adding heat to the reaction will increase the rate, since it causes molecules to move faster and increase the likelihood that molecules will collide. The collision and breaking of bonds represents the uphill phase of a reaction and generates the transition state. The transition state is an unstable high-energy state...
86.2K
Types of Chemical Reactions: Anabolic and Catabolic
18.8K
The first law of thermodynamics holds that energy can neither be created nor destroyed—it can only change form. An organism's essential function is to consume (ingest) energy and molecules in the foods we eat, convert some of it into fuel for movement, sustain our body functions, and build and maintain our body structures. There are two types of reactions that accomplish this: anabolism and catabolism.
Anabolism is the process of combining smaller, simpler molecules into larger, more...
Anabolism is the process of combining smaller, simpler molecules into larger, more...
18.8K

