arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.02006cs.AIcs.LG
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P2ExNet:基于补丁的原型解释网络

P2ExNet: Patch-based Prototype Explanation Network

Technische Universität Kaiserslautern(凯泽斯劳滕工业大学);German Research Center for Artificial Intelligence (DFKI)(德国人工智能研究中心(DFKI))

Dominique Mercier, Andreas Dengel, Sheraz Ahmed

摘要:

深度学习方法在多个领域取得了巨大成功,因为它们能够有效地处理大量数据,能够解决复杂的分类、预测、分割和其他任务。然而,它们具有不可解释性的固有缺点,限制了它们的适用性和可信度。虽然存在解决这一问题的工作,但由于直观和突出的概念,大多数现有方法仅限于图像模态。相反,时间序列领域的概念更复杂,也更不全面,但这些概念和对网络决策的解释在医疗、金融或工业等关键领域至关重要。为了满足可解释方法的需求,我们提出了一种新的可解释网络方案,旨在内在地使用受人类认知启发的可解释推理过程,而不需要额外的事后可解释性方法。因此,使用类特定的补丁,因为它们覆盖与分类相关的局部概念,以揭示与同类样本的相似性。此外,我们引入了一个新的损失有关的可解释性和准确性,限制P2ExNet提供可行的解释数据,包括相关的补丁,他们的位置,类的相似性和比较方法,而不影响准确性。对八个公开的时间序列数据集的结果分析表明,P2ExNet在提供可理解和可追溯的决策的同时,与其同行相比达到了相当的性能。

英文摘要:

Deep learning methods have shown great success in several domains as they process a large amount of data efficiently, capable of solving complex classification, forecast, segmentation, and other tasks. However, they come with the inherent drawback of inexplicability limiting their applicability and trustworthiness. Although there exists work addressing this perspective, most of the existing approaches are limited to the image modality due to the intuitive and prominent concepts. Conversely, the concepts in the time-series domain are more complex and non-comprehensive but these and an explanation for the network decision are pivotal in critical domains like medical, financial, or industry. Addressing the need for an explainable approach, we propose a novel interpretable network scheme, designed to inherently use an explainable reasoning process inspired by the human cognition without the need of additional post-hoc explainability methods. Therefore, class-specific patches are used as they cover local concepts relevant to the classification to reveal similarities with samples of the same class. In addition, we introduce a novel loss concerning interpretability and accuracy that constraints P2ExNet to provide viable explanations of the data including relevant patches, their position, class similarities, and comparison methods without compromising accuracy. Analysis of the results on eight publicly available time-series datasets reveals that P2ExNet reaches comparable performance when compared to its counterparts while inherently providing understandable and traceable decisions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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