6G.P.Singh and S. Udpa. The role of digital signal processing in NDT. NDT International,June 1986, Volume 19, Issue 3, Pages 127-130.
7Warren T, Ni J W. An automated radiographic NDT system for weld inspection[J].NDT&E International, 1996, 29(3):150-159.
8Ziegler, M. A new method for belt condition diagnosis with early recognition on the early recognition of violent damages and on the automatic assessment of belt condition of steel wire conveyor belts[J]. VDI Berichte, 2006(1918): 15-29.
9G.P. Singh and S. Udpa. The role of digital signal processing in NDT. NDT International,June 1986.
10Warren T, Ni J W. An automated radiographic NDT system for weld inspection[J].NDT&E International, 1996,3.