Detection of Weak Zones by Inversion of 2-D Electrical Imaging Data Using Neural Network

P058 ABSTRACT DETECTION OF WEAK ZONES BY INVERSION OF 2- D ELECTRICAL IMAGING DATA USING NEURAL NETWORK HO TRONG LONG GAD EL-QADY KEISUKE USHIJIMA Department of Earth Resources Engineering Graduate School of Engineering Kyushu University Hakozaki 6-10-1 Higashi-ku Fukuoka 812-8581 Japan There is increasing interest particularly for environmental and engineering studies of nearsurface areas. Electrical Imaging or electrical tomography is a survey technique developed for the investigation of areas of complex geology where the use of resistivity sounding and other techniques is unsuitable. Inversion techniques of Electrical Imaging data normally done using least-squares method (e.g. Sasaki 1989 1992 Loke et