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Knowledge-Augmented Explainable and Interpretable Learning for Anomaly Detection and Diagnosis

Martin Atzmueller, Tim Bohne, Patricia Windler

TL;DR

Knowledge-Augmented Explainable and Interpretable Learning for Anomaly Detection and Diagnosis addresses the need for transparent AI systems in anomaly detection across technical domains. It surveys three strands: knowledge-augmented pattern mining (notably subgroup discovery), learning and refining diagnostic scoring systems, and neuro-symbolic approaches that fuse knowledge graphs with neural models for explainable diagnosis. Concrete applications include an industrial logistics anomaly-detection use case and an automotive neuro-symbolic fault-diagnosis framework built on ontologies, SPARQL tooling, and time-series oscillogram classification. The chapter emphasizes how explicit knowledge representations, interactive refinement, and causal reasoning via knowledge graphs enhance interpretability, trust, and computational sensemaking, and highlights future work toward more integrated and generalizable neuro-symbolic architectures.

Abstract

Knowledge-augmented learning enables the combination of knowledge-based and data-driven approaches. For anomaly detection and diagnosis, understandability is typically an important factor, especially in high-risk areas. Therefore, explainability and interpretability are also major criteria in such contexts. This chapter focuses on knowledge-augmented explainable and interpretable learning to enhance understandability, transparency and ultimately computational sensemaking. We exemplify different approaches and methods in the domains of anomaly detection and diagnosis - from comparatively simple interpretable methods towards more advanced neuro-symbolic approaches.

Knowledge-Augmented Explainable and Interpretable Learning for Anomaly Detection and Diagnosis

TL;DR

Knowledge-Augmented Explainable and Interpretable Learning for Anomaly Detection and Diagnosis addresses the need for transparent AI systems in anomaly detection across technical domains. It surveys three strands: knowledge-augmented pattern mining (notably subgroup discovery), learning and refining diagnostic scoring systems, and neuro-symbolic approaches that fuse knowledge graphs with neural models for explainable diagnosis. Concrete applications include an industrial logistics anomaly-detection use case and an automotive neuro-symbolic fault-diagnosis framework built on ontologies, SPARQL tooling, and time-series oscillogram classification. The chapter emphasizes how explicit knowledge representations, interactive refinement, and causal reasoning via knowledge graphs enhance interpretability, trust, and computational sensemaking, and highlights future work toward more integrated and generalizable neuro-symbolic architectures.

Abstract

Knowledge-augmented learning enables the combination of knowledge-based and data-driven approaches. For anomaly detection and diagnosis, understandability is typically an important factor, especially in high-risk areas. Therefore, explainability and interpretability are also major criteria in such contexts. This chapter focuses on knowledge-augmented explainable and interpretable learning to enhance understandability, transparency and ultimately computational sensemaking. We exemplify different approaches and methods in the domains of anomaly detection and diagnosis - from comparatively simple interpretable methods towards more advanced neuro-symbolic approaches.

Paper Structure

This paper contains 25 sections, 7 figures, 1 table.

Figures (7)

  • Figure 1: Visualization SA:18 of the structure data graph (bill of materials information). Each node represents some material, with a node's size proportional to its degree. The color of a node tends to indicate its price in a traffic light scheme from green to yellow and red, where more inexpensive (basic) materials are colored in green and more expensive materials range from yellow to red. We refer to SA:18 for a more detailed discussion.
  • Figure 2: Visualization bohne:2023: Heatmap generation methods, cf. bohne:2023 for a more detailed discussion; the x-axis shows the respective sampling points, the y-axis the normalized voltage, see Figure \ref{['fig:example:signal:architecture']}.
  • Figure 3: Overview (adapted from bohne:2023) of the Neuro-Symbolic architecture.
  • Figure 4: Ontology bohne:2023 for capturing knowledge about On-Board Diagnostics (OBD).
  • Figure 5: Example bohne:2023: SPARQL query to retrieve components for DTC "P2563".
  • ...and 2 more figures