Banca de QUALIFICAÇÃO: JERBESON DE MELO SANTANA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : JERBESON DE MELO SANTANA
DATE: 09/03/2022
TIME: 14:00
LOCAL: videoconferência https://www.youtube.com/channel/UCCBwJxTIfyeGmQSqDLK6duw
TITLE:

Using the Sobel Operator to Improve the Spatial Resolution of the Cross Gradient Constraint

KEY WORDS:

Cross-gradient; Joint Inversion; Sobel Operator; Smoothness Constraint; Total Variation constraint.

PAGES: 36
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUMMARY:

In order to improve the structural resolution in the joint inversion using the cross-gradient link, proposed by Gallardo and Meju, and to reduce the artifacts generated in the joint inversions, we suggest making changes both in the spatial formulation of the gradient calculation and in the of softness. In this work, this was done in two steps: in step E1, we replace both the cross gradient calculation and the finite difference calculation by the spatial formulation of the Sobel operator, in step E2, we replace the smoothness constraint, which is the stabilizer of the objective function with cross-gradient binding to be minimized, by the total variance binding. To demonstrate the effects suggested by steps E1 and E2, we made inversions using two synthetic 2D models.

BANKING MEMBERS:
Interno - 349684 - WALTER EUGENIO DE MEDEIROS
Externo ao Programa - 1298588 - RENATO RAMOS DA SILVA DANTAS
Externo à Instituição - JESSÉ CARVALHO COSTA - UFPA