Comparative Study on Semi-Supervised Learning Applied for Anomaly Detection in Hydraulic Condition Monitoring System

Y Dong, K Chen, Z Ma - 2023 IEEE International Conference on …, 2023 - ieeexplore.ieee.org
Condition-based maintenance is becoming increasingly important in hydraulic systems.
However, anomaly detection for these systems remains challenging, especially since that …

Sparse Representation With Gaussian Atoms and Its Use in Anomaly Detection

DC Ilie-Ablachim, A Băltoiu… - IEEE Open Journal of …, 2023 - ieeexplore.ieee.org
We propose sparse representation and dictionary learning algorithms for dictionaries whose
atoms are characterized by Gaussian probability distributions around some central atoms …

Harnessing Intra-group Variations Via a Population-Level Context for Pathology Detection

PB Githinji, X Yuan, Z Chen, I Gul, D Shang… - arXiv preprint arXiv …, 2024 - arxiv.org
Realizing sufficient separability between the distributions of healthy and pathological
samples is a critical obstacle for pathology detection convolutional models. Moreover, these …

Angle-Based Dictionary Learning for Outlier Detection

DC Ilie-Ablachim, B Dumitrescu - 2023 IEEE Third International …, 2023 - ieeexplore.ieee.org
We propose an extension of the Angle-Based Outlier Detection (ABOD) technique by
combining it with a Dictionary Learning (DL) problem. The ABOD method benefits from this …

Reduced Kernel Dictionary Learning

DC Ilie-Ablachim, B Dumitrescu - 2022 30th European Signal …, 2022 - ieeexplore.ieee.org
In this paper we present new algorithms for training reduced-size nonlinear representations
in the Kernel Dictionary Learning (KDL) problem. Standard KDL has the drawback of a large …