Single sensor Adaptive complex group lasso 2 Complex group lasso 2 Damage detection 2 Frequency response 2 Global monitoring 2 Group lassos 2 Lower frequencies 2 Lowfrequency inspection 2 Sparse damage detection 2 Traditional approaches 2 adaptive complex Group Lasso 2 complex Group Lasso 2 lowfrequency inspection 2 sparse damage detection 2 Arbitrary direction 1 Article 1 Classification (of information) 1 Cost efficiency 1 Detection accuracy 1 Distributed sensor 1 Doppler radar 1 Energy-Efficiency 1 Frequency extraction 1 Gold standards 1 Human activities 1 Human activity recognition 1 Humans 1 Micro-Doppler 1 Obstructive sleep apnea 1