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Nonlocal sparse model with adaptive structural clustering for feature extraction of aero-engine bearings

Nonlocal Sparse ModelSparse RepresentationEngineeringData SciencePattern RecognitionMechanical EngineeringFeature ExtractionMultilinear Subspace LearningAtomic DecompositionInverse ProblemsStructural OptimizationPrincipal Component AnalysisAdaptive Structural ClusteringUnsupervised Machine Learning