We describe a method to perform a constrained lithospheric-scale inversion of satellite gravity gradient data.The a priori constraints include:i)data covariance matrix;ii)prior model covariance matrix including a mode...We describe a method to perform a constrained lithospheric-scale inversion of satellite gravity gradient data.The a priori constraints include:i)data covariance matrix;ii)prior model covariance matrix including a model for spatial variability of mantle heterogeneity.展开更多
The inverse problem of seismology for media with attenuation is considered in this paper. Generalized Standard Linear Solid is used to describe viscoelastic media. In the numerical solution certain parameterizations c...The inverse problem of seismology for media with attenuation is considered in this paper. Generalized Standard Linear Solid is used to describe viscoelastic media. In the numerical solution certain parameterizations can be coupled, it means that true heterogeneity of the only one of parameters can be restored only as a perturbation of another. This is why important to investigate reliability of parameters recovery. By using method based on diffraction patterns it is possible to see whether the parameters are coupled. Singular value decomposition was used to study the possibility of recovering the parameters in practice. It was investigated the possibility of reconstructing of the density, impedances and attenuation properties. Coupling appears on the attenuation properties and impedances separately corresponding to the P-wave and S-wave. It is also should be noted that coupling decreases with increasing frequency range and the condition number.展开更多
In this paper, several approaches for calculation of the effective tensor coefficient for domains with inclusions have been proposed. The limits of the approaches using are found. The series of numerical experiments a...In this paper, several approaches for calculation of the effective tensor coefficient for domains with inclusions have been proposed. The limits of the approaches using are found. The series of numerical experiments are made on the different frequencies, for different inclusions location and boundary conditions for the contrast properties of the matrix and inclusion materials.展开更多
基金supported by the European Space Agency’s Support to Science Element program,project"3D Earth:A Living Dynamics Planet"performed at The Centre for Earth Evolution and Dynamics,University of Oslo,funded by the Research Council of Norway through its center of excellence funding scheme,project 223272IPG SB RAS Project AAAAA16-116122810045-9
文摘We describe a method to perform a constrained lithospheric-scale inversion of satellite gravity gradient data.The a priori constraints include:i)data covariance matrix;ii)prior model covariance matrix including a model for spatial variability of mantle heterogeneity.
文摘The inverse problem of seismology for media with attenuation is considered in this paper. Generalized Standard Linear Solid is used to describe viscoelastic media. In the numerical solution certain parameterizations can be coupled, it means that true heterogeneity of the only one of parameters can be restored only as a perturbation of another. This is why important to investigate reliability of parameters recovery. By using method based on diffraction patterns it is possible to see whether the parameters are coupled. Singular value decomposition was used to study the possibility of recovering the parameters in practice. It was investigated the possibility of reconstructing of the density, impedances and attenuation properties. Coupling appears on the attenuation properties and impedances separately corresponding to the P-wave and S-wave. It is also should be noted that coupling decreases with increasing frequency range and the condition number.
文摘In this paper, several approaches for calculation of the effective tensor coefficient for domains with inclusions have been proposed. The limits of the approaches using are found. The series of numerical experiments are made on the different frequencies, for different inclusions location and boundary conditions for the contrast properties of the matrix and inclusion materials.
