Vestnik KRAUNTS. Fiziko-matematicheskie nauki

14-19

Authors: M. Mamajonov, S.M. Mamajonov

This paper studies the methods of investigation of some boundary value problems for a class of parabolic-hyperbolic equations of the third order in the hexagonal concave areas that take advantage of the study of problems of mathematical physics in the magistracy.

33-48

Authors: O.Kh. Abdullaev

We study the existence and uniqueness of the solution of one boundary value problem for the loaded elliptic-hyperbolic equation of the second order with two lines of change of type in double-connected domain. Similar results have been received by D.M.Kuryhazov, when investigated domain is one-connected.

60-65

Authors: R.I. Parovik

We propose a model of a fractal oscillator with variable fractional order. Received and investigated by numerical solution of the model. The phase trajectory.

71-74

Authors: R.U. Siddikov

We consider a fuzzy-neural programming method in order to control the movement of the robot. The advantages of this method in comparison with the theory of fuzzy sets and neural networks considered separately.

81-85

Authors: V.S. Yakovleva

A simple and valid in-situ measurement method of effective diffusion coefficient of radon and thoron in soil and other porous materials was designed. The analysis of numerical investigation of radon and thoron transport in upper layers of soil revealed that thoron flux density from the earth surface does not depend on soil gas advective velocity and varies only with diffusion coefficient changes. This result showed the advantages of thoron using versus radon using in the suggested method. The comparison of the new method with existing ones previously developed. The method could be helpful for solving of problems of radon mass-transport in porous media and gaseous exchange between soil and atmosphere.

97-102

Authors: D.V. Makarov

We have made a global analysis of the market nanopowders. Based on the available data it can be concluded that the introduction of nano-powders in various spheres of high technologies will occur every year more intensively.