The damped least squares inversion principle is applied to the transient electromagnetic one-dimensional inversion of electrical sources,and a new model is obtained by continuously iterating the initial model,thereby ...The damped least squares inversion principle is applied to the transient electromagnetic one-dimensional inversion of electrical sources,and a new model is obtained by continuously iterating the initial model,thereby fitting the observed transient electromagnetic response,and performing one-dimensional inversion through induced electromotive force play.In this paper,in the damped least squares inversion,constraints are added to the Jacobian matrix,and simultaneous constraint equations and conventional inversion equations are solved.By weighting the constraint parameters,the difference between adjacent resistivities and layer thicknesses is minimized.Finally,K-type and H-type theoretical models were used to verify the reliability of the algorithm,and compared with the conventional transient electromagnetic damping least squares inversion.展开更多
基金sponsored by geological Survey Project of China Geological Survey(DD20189210).
文摘The damped least squares inversion principle is applied to the transient electromagnetic one-dimensional inversion of electrical sources,and a new model is obtained by continuously iterating the initial model,thereby fitting the observed transient electromagnetic response,and performing one-dimensional inversion through induced electromotive force play.In this paper,in the damped least squares inversion,constraints are added to the Jacobian matrix,and simultaneous constraint equations and conventional inversion equations are solved.By weighting the constraint parameters,the difference between adjacent resistivities and layer thicknesses is minimized.Finally,K-type and H-type theoretical models were used to verify the reliability of the algorithm,and compared with the conventional transient electromagnetic damping least squares inversion.
