in order to avoid the “curse of
dimensionality” [3], and numerical simulations exploiting Finite Element Method (FEM)
have been carried out to build the database used to implement FIS. It has been subsequently
tested on experimental measurements, and obtained results have been compared to
simulations carried out by using ECTs and the same fuzzy-based procedure, in order to
validate the proposed heuristic process of inversion and to consider the reliability of UTs in
detection of deep flaws. Wavelet pre-processing as well as FIS implementation and test
have been carried out in Matlab© workspace. The paper is organized as follows: Section 2
describes the used NDT/NDE techniques and characteristics of the implemented database;
Section 3 describes the procedure exploited to implement and train FIS; Section 4 describes
retrieved results and, finally, some conclusions are depicted in Section 5.