Smooth velocity models in reflection tomography for imaging complex geological structures

Imaging Within Complex Velocity Structures with

High frequency linearized inversion estimates a critical component of the earth's velocity eld from measurements of scattered acoustic waves captured in various acquisition geometries. The method partitions the velocity eld into two components: an assumed long scale velocity component and an unknown short scale velocity component. In strongly refacting (complex) velocity elds, several scatterin...

High Resolution Velocity Model for Imaging Complex Structures

Sutherland Models for Complex Reflection Groups

There are known to be integrable Sutherland models associated to every real root system – or, which is almost equivalent, to every real reflection group. Real reflection groups are special cases of complex reflection groups. In this paper we associate certain integrable Sutherland models to the classical family of complex reflection groups. Internal degrees of freedom are introduced, defining d...

Three-dimensional inversion of magnetotelluric data in complex geological structures

Int erp retation of magneto telluri c data over inhomogeneous geolog­ ical st ructures is st ill a challenging problem in geophysical exploration. We have developed a new 3-D MT inversion method and a computer code based on full nonlinear conjugate gradient inversion and quasi­ analyt ical approximation for forward modeling solut ion. Appli cat ion of the QA approximation to forward model ing a...

The Application of Tunnel Reflection Tomography in Tunnel Geological Advanced Prediction Based on Regression Analysis

In the tunnel construction, due to the limitation of the survey and design and the complex dynamics of tunnel surrounding rock geological conditions, so it is difficult for complex geology with the microscopic accurate grasp, often which caused by geological exploration data do not tally with the actual situation, often encountered in karst water inrush, large deformation in weak rock, cave-in ...