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The Bulletin of the Adyghe State University, the series “Natural-Mathematical and Technical Sciences” |
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#4 / 2009MathematicsD.K. Mamiy, A.V. Lavrent’ev, M.H. UrtenovIterative methods of solution of the Fredholm singular perturbed functional equations Special iterative methods of solving the Fredholm singular perturbed functional equations are offered. The current approximation is defined completely from resolvability of the equation for the next approximation in the case when the similar equation has a nontrivial solution. Estimations of convergence velocity have been obtained.
Dynkin’s coefficients of the Adams cohomological operations In the paper, topological characteristics of the Adams cohomological operations are studied. Dynkin’s co-efficients have been found for the virtual Adams notions.
On stabilization of two-dimensional linear discrete-time systems In the paper, an elementary proof of the theorem of stabilization of linear discrete single-input and single-output system of second order by periodic feedback is given.
Qualitative research of polynomial differential systems and some applications of the straight isoclines theory The paper examines applications of the straight isoclines theory to qualitative research of independent cu-bic and quadratic differential systems. The authors give the new proof of Berlinsky theorem about a number of special points of the second group of quadratic system.
Determination of gas reservoir parameters on the basis of a solution of an inverse problem of the filtration theory In this paper, the filtrational and capacity parameters of gas reservoir are determined. The method of solving this problem is based on the solution of inverse problem of filtration theory. In this case the modulating functions method is used.
Development of an algorithm for a numerical solution of an inverse problem of the filtration theory by modulating function method The paper suggests the algorithm for determining filtrational and capacity parameters of gas reservoir. This algorithm is based on the solution of an inverse problem of the filtration theory by modulating function method. A numerical solution of the problem stated is given as well.
PhysicsD.V. Zagulyaev, S.V. Konovalov, V.E. GromovInfluence of low magnetic fields on aluminum creep The paper gives the results of experimental research of the influence of low constant magnetic field (B=0 – 500 mTl) on aluminum creep at the room temperature. The authors show the dependence of speed of creep on the magnetic influence.
Invariant tensors of small valences in the mixed quantum systems The distribution by Young symmetry types was obtained for invariant, concerning affixed representation of the Lie group SL (n, C), covariant 5-, 6-valence tensors.
Linear polarization of a charge radiation in the plane wave electromagnetic field for the case when the polarization vector is directed along velocity of charge movement The paper examines instant and average degrees of linear polarization of global charge radiation in the field of the elliptically polarized electromagnetic wave for the case when the polarization vector is directed along velocity of charge movement.
Influence of orographical perturbation on ozone reallocation in an aerosphere around Kislovodsk The software package was developed in the programming language “MATLAB”, allowing research of the air stream flowing over the topography of any form. The nonlinear, three-layer, hydrodynamical analytical model of a flow is used. On the basis of this model research was made on influence of orographic perturbations on the ozone redistribution in the atmosphere of the Kislovodsk region.
Natural SciencesM.A. Beloglazova, A.R. Tuguz, N.G. Sharipova, V.Yu. SamuseikoThe immune status of workers contacting for a long time with harmful production factors The workers contacting for a long time (from 17 to 32 years) with harmful production factors (lead and its compounds, organic solvents) show deviations from the normative parameters in the general analysis of blood and the immune status. The most significant changes are marked in a cellular part of the immune system: the leucocytary formula, phagocytic part, correlations of T-lymphocyte subpopulations: Ò-supressors (Òs) and Ò-helpers (Òh). Decrease of the immune-regulator index (Òs/Òh) is caused by increase of contents of T-supressors. Microbicidal activity is suppressed on a background of decreased totality of segment-core neutrophils. Deviations in content of IgÀ (decrease) and IgÌ (increase) from the norm have been revealed in humoral part of the immune system. This results in suppression of protective properties of physiological barriers of a skin, mucous membranes of a gastroenteric path and hematoencephalitic barrier and as a whole reduces stability of an organism to infectious diseases.
Adequacy assessment of educational and exercise stresses taking account of age and sexual features of 5-6-form pupils The paper discusses an assessment of adequacy of various kinds of loads for the organism of pupils of 5-6 forms training with the use of different technologies. The significance of various pressure index ranges was compared to analyze the level of vegetative regulation. Despite certain convention of the chosen borders, their application allows revealing vegetative regulation depending on the age, sex and the education curriculum.
Fish parasites as bioindicators of a sanitary condition of fresh water reservoirs The paper examines the fish parasite fauna of reservoirs in the Maikop and the Giaginsky regions located in flood-lands of the Ulka, Giaga and Belaya rivers. Sixty-four species of parasites the majority of which are with a direct cycle of development have been revealed. The parasitological investigation was made for the Tshchiksky water basin fishes whose specific structure differs in the greatest specific diversity. The author has revealed the alteration of specific structure of parasites at the change of a hydrobiological mode of Adygheya Republic reservoirs. This has enabled the author to define parasites reacting sensitively on negative influences of the anthropogenic factors of environment.
History and biology of a noble deer in the Kuban variant The work provides the analysis of all published researches concerning a noble deer in the Kuban variant. The authors consider natural habitat, annual migrations of a deer, a feed, duplication. Recommendations for preservation and restoration of a livestock of a noble deer and methods of hunting are given.
Technical SciencesK.S. ShuryginDevelopment of an algorithm of speech phonetic analysis on the basis of the information theory of speech perception The paper examines the problem of speech phonetic analysis on the basis of the information theory of speech perception. The author suggests a new algorithm of classification and gives results of practical research of optimum parameters.
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