Application of the kernel method to the inverse geosounding problem

  • Authors:
  • Hugo Hidalgo;Sonia Sosa León;Enrique Gómez-Treviño

  • Affiliations:
  • CICESE, Km. 107 Carr. Tijuana-Eda., Ensenada 22860, Mexico;Departamento de Matemáticas, Universidad de Sonora, Hermosillo, Son. 83000, Mexico;CICESE, Km. 107 Carr. Tijuana-Eda., Ensenada 22860, Mexico

  • Venue:
  • Neural Networks - 2003 Special issue: Neural network analysis of complex scientific data: Astronomy and geosciences
  • Year:
  • 2003

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Abstract

Determining the layered structure of the earth demands the solution of a variety of inverse problems; in the case of electromagnetic soundings at low induction numbers, the problem is linear, for the measurements may be represented as a linear functional of the electrical conductivity distribution. In this paper, an application of the support vector (SV) regression technique to the inversion of electromagnetic data is presented. We take advantage of the regularizing properties of the SV learning algorithm and use it as a modeling technique with synthetic and field data. The SV method presents better recovery of synthetic models than Tikhonov's regularization. As the SV formulation is solved in the space of the data, which has a small dimension in this application, a smaller problem than that considered with Tikhonov's regularization is produced. For field data, the SV formulation develops models similar to those obtained via linear programming techniques, but with the added characteristic of robustness.