CAJ | 학술논문

如何得到快速稳定的反演结果和更清晰地重建地下电阻率结构等问题仍然是当前大地电磁反演研究的一个重点。在构制目标函数中采用正则化方法，使不适定反演问题具有稳定的反演结果，并改善解的稳定性和非唯一性；将光滑约束模型和近似灵敏度矩阵求解方法应用于反演过程中，快速稳定地构建地下电阻率结构。理论模型试算的结果表明光滑约束正则化反演方法是可行的，并能合理地重建地下三维电阻率结构。
여하득도쾌속은정적반연결과화경청석지중건지하전조솔결구등문제잉연시당전대지전자반연연구적일개중점。재구제목표함수중채용정칙화방법，사불괄정반연문제구유은정적반연결과，병개선해적은정성화비유일성；장광활약속모형화근사령민도구진구해방법응용우반연과정중，쾌속은정지구건지하전조솔결구。이론모형시산적결과표명광활약속정칙화반연방법시가행적，병능합리지중건지하삼유전조솔결구。
How to get the rapid and stable inversion results and reconstruct the clear subsurface resistivity structures is a focus problem in current magnetotelluric inversion. A stable solution of an ill-posed inverse problem was obtained by the regularization methods in which some desired structures were imposed to stabilize the inverse problem. By the smoothness-constrained model and approximate sensitivity method, the stable subsurface resistivity structures were reconstructed. The synthetic examples show that the smoothness-constrained regularized inversion method is effective and can be reasonable to reconstruct three-dimensional subsurface resistivity structures.