Application of a parameter-shifted grey wolf optimizer for earthquake dynamic rupture inversion

Zhenguo Zhang1,2; Yuchen Zhang2

2021

10.29382/eqs-2021-0049

EARTHQUAKE SCIENCE   影响因子和分区

1674-4519

1867-8777

Global optimization is an essential approach to any inversion problem. Recently, the grey wolf optimizer (GWO) has been proposed to optimize the global minimum, which has been quickly used in a variety of inversion problems. In this study, we proposed a parameter-shifted grey wolf optimizer (psGWO) based on the conventional GWO algorithm to obtain the global minimum. Compared with GWO, the novel psGWO can effectively search targets toward objects without being trapped within the local minimum of the zero value. We confirmed the effectiveness of the new method in searching for uniform and random objectives by using mathematical functions released by the Congress on Evolutionary Computation. The psGWO algorithm was validated using up to 10,000 parameters to demonstrate its robustness in a large-scale optimization problem. We successfully applied psGWO in two-dimensional (2D) synthetic earthquake dynamic rupture inversion to obtain the frictional coefficients of the fault and critical slip-weakening distance using a homogeneous model. Furthermore, this algorithm was applied in inversions with heterogeneous distributions of dynamic rupture parameters. This implementation can be efficiently applied in 3D cases and even in actual earthquake inversion and would deepen the understanding of the physics of natural earthquakes in the future.

grey wolf optimizer dynamic rupture inversion non-linear inversion earthquake rupture

ESCI

英语

第一

National Natural Science Foundation of China["41 922 024","42 174 057"] ; Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology[ZDS-YS2019090209 3007855] ; Shenzhen Science and Technology Program[KQTD20170810111725321]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000871986000003

KEAI PUBLISHING LTD

Web of Science

1.Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology, Southern University of Science and Technology
2.Department of Earth and Space Sciences, Southern University of Science and Technology

Zhenguo Zhang,Yuchen Zhang. Application of a parameter-shifted grey wolf optimizer for earthquake dynamic rupture inversion[J]. EARTHQUAKE SCIENCE,2021,34(6).

Zhenguo Zhang,&Yuchen Zhang.(2021).Application of a parameter-shifted grey wolf optimizer for earthquake dynamic rupture inversion.EARTHQUAKE SCIENCE,34(6).

Zhenguo Zhang,et al."Application of a parameter-shifted grey wolf optimizer for earthquake dynamic rupture inversion".EARTHQUAKE SCIENCE 34.6(2021).