Enhanced Whale Optimization Algorithm for Improved Transient Electromagnetic Inversion in the Presence of Induced Polarization Effects

Ruiheng Li, Yi Di, Qiankun Zuo, Hao Tian () and Lu Gan
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Ruiheng Li: School of Information Engineering, Hubei University of Economics, Wuhan 430205, China
Yi Di: School of Information Engineering, Hubei University of Economics, Wuhan 430205, China
Qiankun Zuo: School of Information Engineering, Hubei University of Economics, Wuhan 430205, China
Hao Tian: School of Information Engineering, Hubei University of Economics, Wuhan 430205, China
Lu Gan: School of Information Engineering, Hubei University of Economics, Wuhan 430205, China

Mathematics, 2023, vol. 11, issue 19, 1-20

Abstract: The transient electromagnetic (TEM) method is a non-contact technique used to identify underground structures, commonly used in mineral resource exploration. However, the induced polarization (IP) will increase the nonlinearity of TEM inversion, and it is difficult to predict the geoelectric structure from TEM response signals in conventional gradient inversion. We select a heuristic algorithm suitable for nonlinear inversion—a whale optimization algorithm to perform TEM inversion with an IP effect. The inverse framework is optimized by opposition-based learning (OBL) and an adaptive weighted factor (AWF). OBL improves initial population distribution for better global search, while the AWF replaces random operators to balance global and local search, enhancing solution accuracy and ensuring stable convergence. Tests on layered geoelectric models demonstrate that our improved WOA effectively reconstructs geoelectric structures, extracts IP information, and performs robustly in noisy environments. Compared to other nonlinear inversion methods, our proposed approach shows superior convergence and accuracy, effectively extracting IP information from TEM signals, with an error of less than 8%.

Keywords: transient electromagnetic method; nonlinear inversion; heuristic algorithm; electromagnetic imaging; whale optimization algorithm (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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