中国物理B ›› 2023, Vol. 32 ›› Issue (9): 96101-096101.doi: 10.1088/1674-1056/acd7d0

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Classification and structural characteristics of amorphous materials based on interpretable deep learning

Jiamei Cui(崔佳梅)1, Yunjie Li(李韵洁)1, Cai Zhao(赵偲)1, and Wen Zheng(郑文)1,2,†   

  1. 1 Institute of Public Safety and Big Data, College of Data Science, Taiyuan University of Technology, Jinzhong 030600, China;
    2 Shanxi Engineering Research Center for Intelligent Data Assisted Treatment, Changzhi Medical College, Changzhi 046000, China
  • 收稿日期:2023-03-03 修回日期:2023-05-17 接受日期:2023-05-23 发布日期:2023-09-01
  • 通讯作者: Wen Zheng E-mail:zhengwen@tyut.edu.cn
  • 基金资助:
    Project supported by National Natural Science Foundation of China (Grant No. 11702289), the Key Core Technology and Generic Technology Research and Development Project of Shanxi Province, China (Grant No. 2020XXX013), and the National Key Research and Development Project of China.

Classification and structural characteristics of amorphous materials based on interpretable deep learning

Jiamei Cui(崔佳梅)1, Yunjie Li(李韵洁)1, Cai Zhao(赵偲)1, and Wen Zheng(郑文)1,2,†   

  1. 1 Institute of Public Safety and Big Data, College of Data Science, Taiyuan University of Technology, Jinzhong 030600, China;
    2 Shanxi Engineering Research Center for Intelligent Data Assisted Treatment, Changzhi Medical College, Changzhi 046000, China
  • Received:2023-03-03 Revised:2023-05-17 Accepted:2023-05-23 Published:2023-09-01
  • Contact: Wen Zheng E-mail:zhengwen@tyut.edu.cn
  • Supported by:
    Project supported by National Natural Science Foundation of China (Grant No. 11702289), the Key Core Technology and Generic Technology Research and Development Project of Shanxi Province, China (Grant No. 2020XXX013), and the National Key Research and Development Project of China.

摘要: Defining the structure characteristics of amorphous materials is one of the fundamental problems that need to be solved urgently in complex materials because of their complex structure and long-range disorder. In this study, we develop an interpretable deep learning model capable of accurately classifying amorphous configurations and characterizing their structural properties. The results demonstrate that the multi-dimensional hybrid convolutional neural network can classify the two-dimensional (2D) liquids and amorphous solids of molecular dynamics simulation. The classification process does not make a priori assumptions on the amorphous particle environment, and the accuracy is 92.75%, which is better than other convolutional neural networks. Moreover, our model utilizes the gradient-weighted activation-like mapping method, which generates activation-like heat maps that can precisely identify important structures in the amorphous configuration maps. We obtain an order parameter from the heatmap and conduct finite scale analysis of this parameter. Our findings demonstrate that the order parameter effectively captures the amorphous phase transition process across various systems. These results hold significant scientific implications for the study of amorphous structural characteristics via deep learning.

关键词: amorphous, interpretable deep learning, image classification, finite scale analysis

Abstract: Defining the structure characteristics of amorphous materials is one of the fundamental problems that need to be solved urgently in complex materials because of their complex structure and long-range disorder. In this study, we develop an interpretable deep learning model capable of accurately classifying amorphous configurations and characterizing their structural properties. The results demonstrate that the multi-dimensional hybrid convolutional neural network can classify the two-dimensional (2D) liquids and amorphous solids of molecular dynamics simulation. The classification process does not make a priori assumptions on the amorphous particle environment, and the accuracy is 92.75%, which is better than other convolutional neural networks. Moreover, our model utilizes the gradient-weighted activation-like mapping method, which generates activation-like heat maps that can precisely identify important structures in the amorphous configuration maps. We obtain an order parameter from the heatmap and conduct finite scale analysis of this parameter. Our findings demonstrate that the order parameter effectively captures the amorphous phase transition process across various systems. These results hold significant scientific implications for the study of amorphous structural characteristics via deep learning.

Key words: amorphous, interpretable deep learning, image classification, finite scale analysis

中图分类号:  (Disordered solids)

  • 61.43.-j
64.60.aq (Networks) 47.57.-s (Complex fluids and colloidal systems) 64.60.at (Convolution)