## TangShang earthquake: analysis of the data of electromagnetic monitoring

An attempt is made to use the data of monitoring of electromagnetic precursors of earthquakes for reconstructing the time dynamics of some characteristics of the medium in the regions under observation. The results obtained show that, although the data are designed for statistical analysis, some parameters of the medium associated...

## A mathematical model of determining the stress field and dilatant zones by geodetic data

An inverse problem to determine the location of acting equivalent forces to geodetic data on the surface of the Earth's crust is considered within the framework of the quasistatic model for the elastic isotropic half-space with the sources of point type. It uses the data of monitoring for deformations of...

## On the multidisciplinary approach to determination of an integral earthquake precursor

A physical-mathematical model and approaches to the measurement of the integral earthquake precursor proposed in the form of a theoretical scheme are developed by authors in previous papers. This model can probably reduce the acuteness of contradictions which often take place between precursors of different physical nature when a multidisciplinary...

## Concentrated force in a porous half-space

The formulas for calculation the displacement of an elastic porous body, strains and pressure for simple forces using the Galerkin vector are obtained.

## Physical-mathematical simulationin design of technological processes

The present paper is an attempt to develop a technology of fertilizer production with optimal output of nutrients (humates, macro- and microelements) on the basis of physical-mathematical simulation using vibroaction. An empirical formula relating the basic technological parameters, such as the frequency of vibroaction, time and temperature of the process...

## An inverse problem of electromagnetoelasticity: simulteneous determination of elastic and electromagnetic parameters and the unknown source of elastic oscillations.

This paper describes a numerical method for the solution to the inverse problem for the equations of electromagnetoelasticity. We consider the case when electromagnetic waves are generated by elastic deformations. At the same time, we neglect the reverse influence of the electromagnetic field on the elastic oscillations.

We focus our...

## Estimation of physical properties of bottom sedimentary deposits using seismic data

In this paper, a technique for estimating diverse physical properties of bottom deposits is discussed. The methodology is based on the evaluation of reflection coefficients of stratigraphic boundaries using the amplitudes of bottom and multiple acoustic reflectors by the so-called quotient method in combination with the regression equations of Hamilton...

## Application of the Laguerre integral transforms for solving dynamic seismic problems

When solving the forward seismic problems in inhomogeneous media it appeared effective to use algorithms based on a combination of finite integral Fourier, Fourier-Bessel or Legendre transforms along one or two spatial coordinates with the finite difference technique along the remaining coordinate. The development of such an approach for vertically...

## Forward seismic modeling based on combination of finite Fourier transforms with matrix decomposition method

This paper is the latest version of the numerical-analytical algorithm for solving the forward seismic problem and migration. The main concept of the algorithm is in splitting of 2D and 3D seismic problems to a series of 1D problems with the help of the finite integral Fourier, Fourier-Bessel or Legendre...

## On an algorithm of domain decomposition based on finite integral Fourier-Bessel transforms

The paper presents an algorithm of domain decomposition when solving the forward dynamic seismic problem in the polar coordinate system. The new algorithm is based on combination of the method of direct and of finite integral Fourier transforms. As seen from the studies conducted, if on some sites of the...

## On the need for creation of a computer bank and cadaster for data on peat. Recommendations on processing

Rational utilization of raw materials and effective control of their use calls for creation of computer data banks on the state of natural resources. The necessity of creation of a data bank on peats is obvious.

First, Russia occupies a highly important place in the world's resources of peat. The...

## The influence if vibroaction on the structure and activation of substances

Differences and regularities of the behavior of quartz under the action of the both methods make it possible to conclude that vibroaction is a promising and highly effective method of activation of substances. It allows (given the deformation of the structure is small without reconstruction) a considerable increase of the...

## Reconstruction of tsunami initial form via water level oscillation

The paper is devoted to reconstruction of the movement of the ocean bottom when the water elevation is known at the finite set of points. For this ill-posed problem the technique using r-solutions is suggested; it is based on the singular value decomposition of the compact operator. The dependence of...