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来自温度加速切片采样模拟的障碍物穿越事件的动力学
Sameer Saurav1,2, Debjit Das3, Ramsha Javed1
1Department of Chemistry, Indian Institute of Technology Kanpur (IITK), Kanpur 208016, India. nnair@iitk.ac.in.
Physical chemistry chemical physics : PCCP
|January 23, 2026
概括
这项研究引入了一种新协议,用于使用温度加速切片采样 (TASS) 模拟计算反应速率常数. 该方法准确地从自由能量数据中确定动力学,扩大了TASS在分子动力学中的应用.
科学领域:
- 计算化学和分子动力学
背景情况:
- 温度加速切片采样 (TASS) 是一种用于探索高维集体变量 (CV) 空间的增强采样技术.
- 塔斯利用制偏差,元动力学偏差和温度加速来实现详尽的采样.
- 从TASS模拟产生的自由能量数据中确定动速常数是一个重大挑战.
研究的目的:
- 开发和验证使用TASS计算障碍穿越事件的速率常数的新方案.
- 将TASS的适用性扩展到自由能源景观探索之外的动力分析.
- 解决从不同的TASS模拟切片中获得的自由能量数据中恢复动力学的挑战.
主要方法:
- 开发一个集成基于人工神经网络 (ANN) 的自由能源景观表示的协议.
- 使用罕见的元动力学与TASS模拟相结合.
- 将协议应用于计算分子系统的速率常数.
主要成果:
- 成功计算了真空中二的构造变化的准确速率常数.
- 获得了可靠的速率常数,用于从素中解脱扎米丁.
- 通过计算阿司匹林从β-cyclodextrin解结的速率常数来验证协议.
结论:
- 拟议的协议有效地从TASS生成的自由能源数据中恢复动力信息.
- 这一进步扩大了TASS对包括动力学在内的综合分子动力学研究的实用性.
- 该方法在各种分子系统和过程中证明了准确性.
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