X-CHAR:一个基于概念的可解释的复杂人类活动识别模型
Jeya Vikranth Jeyakumar1, Ankur Sarker1, Luis Antonio Garcia2
1University of California Los Angeles, USA.
概括
X-CHAR提供可解释的人类活动识别 (HAR),而不需要精确的低级活动注释. 这种深度学习模型产生了可理解的概念序列和反事实,减少了专家的工作量,提高了对安全关键应用程序的信任.
科学领域:
- 计算机科学 计算机科学
- 人工智能的人工智能
- 机器学习 机器学习
背景情况:
- 人类活动识别 (HAR) 的深度学习模型对于安全关键应用至关重要,但往往缺乏可解释性.
- 现有的可解释的HAR方法需要广泛,精确的低级活动注释,增加专家工作量和错误潜力.
- 弥合高性能深度学习和可信,可解释的HAR之间的差距仍然是一个重大挑战.
研究的目的:
- 介绍X-CHAR,一个可解释的复杂人类活动识别模型.
- 开发HAR的深度学习方法,提供人类可以理解的解释,而不需要精确的低级活动注释.
- 减轻领域专家的负担,同时保持强大的预测准确度.
主要方法:
- X-CHAR将复杂的活动模型作为高级概念的序列.
- 使用连接式时间分类 (CTC) 损失来处理序列信息,而无需对低级注释进行确切的开始/结束时间.
- 以概念序列和反事实示例的形式生成解释.
主要成果:
- 对于时间序列数据,X-CHAR实现了与基线端到端深度学习模型可比的强大性能.
- 该模型成功地以可理解的高级概念的形式提供了解释.
- 一项机械土耳其研究证实,X-CHAR的解释比现有方法的解释更容易理解.
结论:
- X-CHAR为可解释复杂的 HAR 提供了可行的解决方案,减少了开发人员的负担并增强了模型的信任.
- 该方法有效地平衡了时间序列数据的可解释解释的预测准确性.
- 这项工作推动了可解释AI在安全关键的HAR应用领域的发展.
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