Fig. 3
THz time-domain signal of the hollowing deterioration samples. The corresponding hollowing sample parameters as follows: d_1 = 2 mm, d_2 = 0 ~ 4 mm, d_3 = 6 mm
Fig. 3 | Heritage Science
THz time-domain signal of the hollowing deterioration samples. The corresponding hollowing sample parameters as follows: d_1 = 2 mm, d_2 = 0 ~ 4 mm, d_3 = 6 mm
