用主动学习加速炸药性能预测,突破化学空间探索瓶颈。
Active Learning for Generalizable Detonation Performance Prediction of Energetic Materials
- 结合量子计算与神经网络,主动筛选高潜力分子
- 构建超大数据库,性能预测准确率R²超0.98
- 揭示氧平衡是性能关键,指导未来合成方向
新含能材料的发现对国防及民用技术至关重要,但实验成本高、计算需精确输入,难以高效预测爆炸性能。本文提出一种主动学习策略,融合密度泛函理论、热化学建模、消息传递神经网络与贝叶斯优化,构建高通量工作流,通过有目标地选择新分子,平衡化学空间探索与高性能候选者挖掘。该方法从超过700亿候选分子中生成目前最大公开的CHNO类炸药数据库,并建立通用性极强的代理模型,可精准预测爆炸性能(R² > 0.98)。特征重要性分析表明,氧平衡是主导因素,局部电子结构、密度及特定官能团亦有贡献。化学信息学分析显示,性能相近的材料在化学空间中聚集,为后续合成研究提供明确指引。整体成果为跨多样化、未探索化学区域的高通量筛选与定向发现提供了坚实基础。
原文摘要 · Abstract (English)
The discovery of new energetic materials is critical for advancing technologies from defense to private industry. However, experimental approaches remain slow and expensive while computational alternatives require accurate material property inputs that are often costly to obtain, limiting their ability to efficiently predict detonation performance across a vast chemical space. We address this challenge through an active learning strategy that integrates density functional theory calculations, thermochemical modeling, message-passing neural networks, and Bayesian optimization. The resulting high-throughput workflow iteratively expands the training dataset by selecting new molecules in a targeted manner that balances the exploration of broad chemical space with the exploitation of promising high-performing candidates. This approach yields the largest publicly available database of potential CHNO explosives drawn from an initial pool of more than 70 billion candidates and a generalizable surrogate model capable of accurately predicting detonation performance (R$^2$ > 0.98). Feature importance analysis on this largest-to-date dataset reveals that oxygen balance is the dominant driver of detonation performance, complemented by contributions from local electronic structure, density, and the presence of specific functional groups. Cheminformatics analysis highlights how energetic materials with similar performance metrics tend to cluster in distinct chemical spaces offering a clearer direction for future synthesis studies. Together, the surrogate model, database, and resulting chemical insights provide a valuable foundation for high-throughput screening and targeted discovery of new energetic materials spanning diverse and previously unexplored regions of chemical space.
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