Mathematical Modeling in Geophysics, № 10, 2005

The paper considers theory, methods and experiments aimed at creation of a monitoring system of active volcanos with the use of powerful vibroseismic sources. We propose a concept of creation of a system for studying the geometry of magma chambers, deep faults in the neighborhood of volcanos, dynamics of eruption...

One of essential attributes of the method of electromagnetic monitoring of geodynamic processes is that under the action of tectonic processes, electrical properties of a geological structure change. Electrical logging data give a large body of information for the study of rocks composing a section of formations of the Earth's...

In the given paper, a mathematical model for layered porous media is constructed. A series of numerical experiments is carried out. There is observed a weak dependence of the filtration velocity on the physical properties of a medium as compared to the boundary pressure value.

Nonlinear wave processes of radiation and propagation of elastic oscillations in complex subsurface geometries are analyzed in terms of their role in improving the quality of seismic monitoring of geodynamic processes. The efficiency of this approach is illustrated by measuring parameters of seismic waves and analyzing their temporal dynamics with...

The basic steps of the method of automatic location of borehole sources have been developed. This has been done by measuring the initial wave characteristics used to solve the inverse problem of determining the source coordinates and velocities of near-borehole media.

The problem of simulation of an industrial explosion for a vertically inhomogeneous medium has been considered in a general form. An algorithm to transform a wave field to a pulsed form, which uses a priori information about the space distribution of charges and delay times in a quarry explosion, is...

In non-homogeneous media with a variable wave propagation velocity it is not so easy to solve the boundary wave ray problem, i.e., to define a wave-ray, which connects two given points of the area. In this paper, an effective method for the wave-rays definition is proposed. The method does not...

A new attempt to the detection of the impact craters and other morphologic structures on the Earth's surface was made using high-tech computational methods. For detection and allocation of such structures, the fast two-dimensional wavelet transformation and the fast nonlinear multiparameter regression analysis for the digital elevation (DEM) data subsets...

The pulsed action on fluid-saturated nonlinearly deformed porous media is considered. A mathematical model of a nonlinear two-velocity medium was obtained on the basis of the method of conservation laws. The model is thermodynamically consistent and hyperbolic in the reversible approximation. The numerical model is based on Godunov's explicit scheme...

The inverse problem of wave scattering for a system of data collected at the observation surface with multiple coverage of sources and receivers is considered. It is shown that this redundant data system is equivalent to the configuration studied previously, in which the receiver point coincides with the source point...

A comparative analysis of the group aero- and armor ballistics of the ancient and modern poly-wedge arrows is made. The idea formulated is to use these arrows as components of warheads of the carrier rockets for the anti-asteroid defence of the Earth and the orbital stations.

We discuss a specific nature of the phase-synchronized-weighted (Synphase-Weighted) Median Filters when processing frequency-modulated (possibly, swip) signals recorded at a discrete time. It is shown that the response of the Synphase-Weighted Median Filters weaker depends on the filter length than the response of conventional median filters. The conclusions obtained are...