Global Geology 2017, 20(1) 40-45 DOI:   10.3969/j.issn.1673-9736.2017.01.05  ISSN: 1673-9736 CN: 22-1371/P

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Keywords
full waveform inversion
spectral conjugate gradient method
conjugate gradient method
steepest descent method
Authors
PubMed

Full waveform inversion with spectral conjugate gradient method

LIU Xiao, LIU Mingchen, SUN Hui, WANG Qianlong

College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China

Abstract

Spectral conjugate gradient method is an algorithm obtained by combination of spectral gradient me-thod and conjugate gradient method, which is characterized with global convergence and simplicity of spectral gradient method, and small storage of conjugate gradient method. Besides, the spectral conjugate gradient method was proved that the search direction at each iteration is a descent direction of objective function even without relying on any line search method. Spectral conjugate gradient method is applied to full waveform inversion for numerical tests on Marmousi model. The authors give a comparison on numerical results obtained by steepest descent method, conjugate gradient method and spectral conjugate gradient method, which shows that the spectral conjugate gradient method is superior to the other two methods.

Keywords full waveform inversion   spectral conjugate gradient method   conjugate gradient method   steepest descent method  
Received 2016-11-16 Revised 2017-01-07 Online:  
DOI: 10.3969/j.issn.1673-9736.2017.01.05
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