Issue 49

S. Djaballah et alii, Frattura ed Integrità Strutturale, 49 (2019) 291-301; DOI: 10.3221/IGF-ESIS.49.29 295 Diagnosis of defects by time and frequency analysis Seven time indicators   T peak RMS Ku ImF CF TALAF THIKAT Three spectral descriptors T fouter finner fball x x x     (3) Hence, the input vector of the RNA, composed of 10 indicators, is given by T fouter finner fball peak RMS Ku ImF CF TALAF THIKAT x x x     (4) Case 1: 4 output neural network Figure 5 : RNA structure {10 10 4 }. Case 2: 10 output neural network Figure 6 : RNA structure {10 10 10 }. Feature RN Feature RN