A structural model for two-dimensional silicide with structure ( 2/3 √3× 2/3 √3)-R30°, consisting of five layers (three layers of Mg and two layers of Si) with all Mg–Si fixed bonds, was proposed on the b...
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A structural model for two-dimensional silicide with structure ( 2/3 √3× 2/3 √3)-R30°, consisting of five layers (three layers of Mg and two layers of Si) with all Mg–Si fixed bonds, was proposed on the basis of EELS data. The observed redshift of EELS bulk plasmon on 0.8 eV is satisfactorily explained in the framework of the model by the reduction of carrier density and formation of fixed Mg–Si bonds.
In this paper we analyzed the properties of the approximating polynomials, obtained by the method of least squares. It was revealed that with increasing density and uniformity of the distribution of examples on the in...
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In this paper we analyzed the properties of the approximating polynomials, obtained by the method of least squares. It was revealed that with increasing density and uniformity of the distribution of examples on the interval of approximation, the criterion of minimum mean-square error indirectly brings to equality of the integral characteristics of the approximating polynomial and the approximated function. The method has been suggested to parameterize of the approximating polynomials on the basis of this, and the numerical experiments demonstrated advantages.
This paper presents the development of a free-surface three-dimensional oceanographic model, for the use on cluster computers. The s-coordinate, free surface model is based on full nonlinear primitive equations of the...
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This paper presents the development of a free-surface three-dimensional oceanographic model, for the use on cluster computers. The s-coordinate, free surface model is based on full nonlinear primitive equations of the ocean. Numerical integration procedure is based on time-splitting method with Robert-Asselin filtering. Parallelism is provided via high-level message-passing routines. The resulting numerical code allows an efficient use of a cash memory to minimize processor-memory data exchange.
The modes of dynamics of genetic structure and population size are investigated in this work. It is assumed that main population characteristics, such as reproductive potential and survival rate of reproductive part o...
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The modes of dynamics of genetic structure and population size are investigated in this work. It is assumed that main population characteristics, such as reproductive potential and survival rate of reproductive part of population in following years of life are determined on genetic level. Our research has shown that despite increasing of average population fitness is followed by arising of complicated dynamics of population size and of genetic structure, further growth of fitness is capable to stabilize the genetic structure of population and so only the population size will be fluctuating with regular or chaotic circling. The type of the final genetic equilibrium depends upon initial conditions in a very complicated way. Therefore the initial conditions play essential role for the evolution of natural population.
This work considers the results of optimal harvest with constant quota in population with two age-classes. It has been analytically shown that maximum of income is not achieved under the catch from both age-classes si...
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This work considers the results of optimal harvest with constant quota in population with two age-classes. It has been analytically shown that maximum of income is not achieved under the catch from both age-classes simultaneously. It has been shown that even if catch with constant quota is carried out from one age group independently of individual genotypes the type of genetic equilibrium in population can change.
The model considering influence of non-linear effects of metabolic regulation of phytoplankton's growth has been developed and investigated in this work. It has been shown by the model that metabolites that are pr...
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The model considering influence of non-linear effects of metabolic regulation of phytoplankton's growth has been developed and investigated in this work. It has been shown by the model that metabolites that are produced by the algae are capable to stabilize the phytoplankton's growth under conditions of abundant inflow of nutrients.
The sea surface merged charts of thermal structures in the form of dominant orientations of thermal contrasts (DOTCs) provide an information about surface circulation regularly. High correlation between DOTCs and flow...
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The sea surface merged charts of thermal structures in the form of dominant orientations of thermal contrasts (DOTCs) provide an information about surface circulation regularly. High correlation between DOTCs and flow directions makes it possible to use them for water eddy identification. A new method for automatic identification of eddies as arbitrary closed circulations is proposed. The method consists of three procedures: identification of an eddy and its center, computation of size and shape;construction of an eddy contour by minimization of DOTC "leaking" out of the contour;the analysis of constructed contours and screening off false detected objects. The main problem of the automatic eddy detection which is the possibility for generation of the false detected objects is considered. The screening algorithms are proposed, their effectiveness is demonstrated and the opportunities of automatic eddy tracing on a temporary chart sequence are estimated. The method has been tested on three month sequence of DOTC charts of Okhotsk sea region under heavy cloudy conditions.
New results for problem of matrices spectra computation and a methodology for study of observability, controllability and stability of dynamical systems under conditions of finite precision calculations are presented.
New results for problem of matrices spectra computation and a methodology for study of observability, controllability and stability of dynamical systems under conditions of finite precision calculations are presented.
A method for automatic monitoring of tropical cyclones (TC) has been developed. The method is based on a structure analysis of TC cloudiness on satellite imagery. It consists of three procedures: detection of cloudy c...
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A method for automatic monitoring of tropical cyclones (TC) has been developed. The method is based on a structure analysis of TC cloudiness on satellite imagery. It consists of three procedures: detection of cloudy cluster, computation of TC eye size and location, estimation of TC center and geometry of cloudy swirling. The main procedure of TC center estimation uses cloudy structure charts in a form of dominant orientation of thermal contrasts (DOTC). The DOTCs can be used as estimations of wind velocity directions. The procedure computes the TC center on the base of a model of circular movement. The method approbation on satellite images of Far-Eastern region for three year summer seasons has demonstrated high reliability (the centers have been computed almost always) and good correspondence with the results of Japan Meteorological Agency and Joint Typhoon Warning Center (USA). The TC tracks are used for automatic computation of typhoon warm core, humidity parameters and near surface wind velocity on the base of atmosphere profiles of temperature and humidity retrieved from ATOVS/NOAA radiometer measurements.
The paper describes a computer knowledge bank on medical diagnostics in the field of ophthalmology. The knowledge bank is developed as a web-based set of applications and can be used within the framework of cloud comp...
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The paper describes a computer knowledge bank on medical diagnostics in the field of ophthalmology. The knowledge bank is developed as a web-based set of applications and can be used within the framework of cloud computing technology.
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