This study reveals a possible correlation between splashing morphology and the normalized impact force exerted by an impacting drop on a solid surface. This finding is obtained from a newly proposed feature extraction method and a subsequent interpretation of the classification of splashing and non-splashing drops performed by an explainable artificial intelligence (XAI) video classifier. Notably, the values of the weight matrix elements of the XAI that correspond to the extracted features are found to change with the temporal evolution of the drop morphology. We compute the rate of change of the contributions of each frame with respect to the classification value of a video as an important index to quantify the contributions of the extracted splashing and non-splashing features at different impact times to the classification of the XAI model. Remarkably, the rate computed for the extracted splashing features is found to closely match the profile of the normalized impact force, where the splashing features are most pronounced immediately after the normalized impact force reaches its peak value. This study has provided an example that clarifies the relationship between the complex morphological evolution of a splashing drop and physical parameters by interpreting the classification of an XAI video classifier.

通过解释性人工智能（XAI）视频分类器对飞溅和非飞溅滴体进行分类并计算每帧对于分类值的贡献变化率的方法，本研究揭示了飞溅形态与滴体对固体表面冲击力之间的可能相关性，进而提供了飞溅滴体复杂形态演化与物理参数之间关系的示例。

Correlation between morphological evolution of splashing drop and
  exerted impact force revealed by interpretation of explainable artificial
  intelligence

通过可解释的人工智能解析，揭示飞溅液滴形态演化与施加冲击力之间的相关性