arXiv:2501.06099cs.LGcs.AI2025-01被引 26

通过关注上下文相关数据,提升能耗异常检测的解释一致性。

Explaining Deep Learning-based Anomaly Detection in Energy Consumption Data by Focusing on Contextually Relevant Data

  • 基于上下文选择背景数据,结合特征重要性和相似度筛选关键信息
  • 在5个数据集上使解释变异性平均降低约38%
  • 适合需要可解释性且关注稳定性的能源管理场景

能耗异常检测对发现能源浪费、设备故障及保障高效能源管理至关重要。尽管机器学习特别是深度学习在异常检测中表现优异,但其黑箱特性缺乏透明性与可解释性。现有解释方法如SHAP存在计算复杂度高或结果不稳定的问题。本文提出一种聚焦上下文相关数据的可解释性方法,结合SHAP变体、全局特征重要性及加权余弦相似度,为每个异常点选择上下文相关的背景数据集。通过聚焦上下文与最相关特征,有效缓解了解释算法的不稳定性。在10种不同机器学习模型、5个数据集和5种XAI技术上的实验表明,该方法显著降低了解释变异性,统计分析证实其鲁棒性:跨多个数据集平均变异性降低约38%。

原文摘要 · Abstract (English)

Detecting anomalies in energy consumption data is crucial for identifying energy waste, equipment malfunction, and overall, for ensuring efficient energy management. Machine learning, and specifically deep learning approaches, have been greatly successful in anomaly detection; however, they are black-box approaches that do not provide transparency or explanations. SHAP and its variants have been proposed to explain these models, but they suffer from high computational complexity (SHAP) or instability and inconsistency (e.g., Kernel SHAP). To address these challenges, this paper proposes an explainability approach for anomalies in energy consumption data that focuses on context-relevant information. The proposed approach leverages existing explainability techniques, focusing on SHAP variants, together with global feature importance and weighted cosine similarity to select background dataset based on the context of each anomaly point. By focusing on the context and most relevant features, this approach mitigates the instability of explainability algorithms. Experimental results across 10 different machine learning models, five datasets, and five XAI techniques, demonstrate that our method reduces the variability of explanations providing consistent explanations. Statistical analyses confirm the robustness of our approach, showing an average reduction in variability of approximately 38% across multiple datasets.

异常检测可解释性能耗分析SHAP

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