No 2.1 (2010)
- Year: 2010
- Articles: 15
- URL: http://journals.rudn.ru/miph/issue/view/523
Articles
The Asymptotic Behavior of Solutions of Two Problems of Dynamic of Exponentially Stratified Fluid
Abstract
This article is devoted to studying the components of solutions of two problems of dynamics. The problems describe the small fluctuations of the exponentially stratified and uniformly rotating fluid in the Cartesian system of coordinates (x1,x2,x3) rigidly connected with the rotating fluid. The fluid is stratified along the axis Ox3 coinciding with the axis of rotation: ρ0(x3) = Aexp(−2βx3), where β > 0 is a parameter of stratification. The asymptotics of the components of solution are constructed for both problems.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):5-10
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The Weak Zero-One Law for the Random Distance Graphs
Abstract
In this paper, the weak zero-one j-law is defined. The results for the random distance graphs similar to the statements for the zero-one law and random graphs are obtained.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):11-25
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The MAP/G/1/ Discrete-Time Queueing System with Inversive Service Order and Probabilistic Priority
Abstract
This paper considers a discrete-time queueing system MAP∕G∕1∕∞ that is determined as follows. Upon arrival into the system of a new customer its length is compared with the (remaining) length of the customer in the device and with some probability which depends only on this two lengths, a new arrival will occupy the server while pushing out a servicing customer to the first place in the queue, and with the supplemental probability, alternatively, the newly arrived one occupies the first position in the queue (inversive service order and probabilistic priority). The main stationary characteristics of such systems behavior have been found. A number of numerical examples are presented according to found analytical formulae.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):26-36
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On Two Queuing Systems with «Transparent» Calls Applying to the Multicast Network Analysis
Abstract
Two multicast service models with different users behavior are considered. We present corresponding mathematical models as queuing systems M|G|1|0|T with arbitrary distributed service times and transparent (T) calls. Calculation formulas for stationary probabilities of service customers and other characteristics are obtained.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):37-41
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A Method to Solve the Resource Allocation Problem in the Design of Virtual Private Networks with Unicast and Multicast Connections
Abstract
This paper is concerned with the resource allocation problem in the design of virtual private networks (VPNs) with unicast and multicast connections. The objective is to maximize the total network revenue that depends on blocking probabilities. Requests to set up connections are blocked if there is not enough available bandwidth on links of the infrastructure network, e.g. IP/MPLS (Multiprotocol Label Switching). We develop an approximate method to allocate bandwidth to VPNs based on revenue sensitivities calculation considering the implied costs - expected revenue loss due to capacity reduction when a new unicast or multicast connection is set up.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):42-53
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Mathematical Model of the Dynamic Behavior of RED-Like System Parameters
Abstract
In this paper a mathematical model of an autonomous system of three ordinary differential equations depending on parameters algorithm for active queue management such as Random Early Detection (RED) is constructed. The method for self-oscillation area evalution and critical (stationary) point selection is introduced. The patametric and phase portraits for systems with algorithms RED, GRED, DSRED and ARED are analyzed.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):54-64
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On the Solving of Stochastic Problem of Closure by Designings Method
Abstract
One of the inverse problems of dynamics - the closures problem by given properties of motion, no depending from velocities, into the class of stochastic differential Itos equations of second order is considered. The necessary and sufficient conditions of the existence of given integral manifold of constructed system of stochastic equations are received. The linear case of posed problem are separately investigated.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):65-71
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Stability of Program Manifold Single-Tuned System
Abstract
The single-tuned systems possessing by given program manifold are considered. The necessary and sufficient conditions of the programm manifolds absolute stability with respect to vector-function ω are obtained when the matrix of state has special structure.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):72-78
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On Some Aspects of Applying Polynorms on the Algebras in Physics
Abstract
In this article it is considered some opportunities of using in physics the pseudo-norms of degree above 2 (polynorms) on the hypercomplex algebras, first of all on the example of the biquaternion algebra. Due to above a new point of view on the number of the known questions appears. In particular it is shown that the 4-norm consideration in the field theory makes natural the transition from the Maxwells electrodynamics to the Born-Infelds nonlinear electrodynamics. Besides the algebraic approach shows naturalness of the addition the nonlinear term into the mezon Lagrangian of the nuclear forces offered by T. Skyrme what supposedly can improve some properties of the model. Thus the algebraic consideration allows to clear some intuitive findings in the nonlinear field theories, and also to bring in them some additional elements of rigidity.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):79-94
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Extension of Abelian Gauge Symmetry
Abstract
A generalization of the U(1) gauge symmetry group by permutation of the generator and the unity is proposed. Thus a commutative extension of the symmetry group is obtained. The two-dimensional matrix representation of this group contains matrices with determinants both 1 and −1. The aim of the present work consists in establishing the necessity of existence of so-called imaginary charges and electromagnetic fields with negative energy density. Some cosmological issues of the existence of such fields are discussed.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):95-100
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Computer Detection of Skin Fragments on Face Images
Abstract
The problem of the automatic skin fragments detection on images of the persons is considered. The algorithm and corresponding program were designed. The series of sample images on which one must to determine skin fragments are used as input data. C# language was used for realization of the program. Designed application has a good search speed and has the suitable user interface.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):101-103
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Solution of the Electromagnetic Waves Propagation Through a Stratified Medium Problem
Abstract
The problem of plane monochromatic linearly polarized electromagnetic wave diffraction through a stratified nonabsorbing medium is solved by means of general Maxwell equations solution expansion on fundamental solutions system for each layer, in case of isotropic media - for each separate polarization. In case of isotropic media for one (TE or TM) polarization the problem is equivalent to one of solving a linear algebraic equations system - two boarder equations on each boarder. In case of general monochromatic polarized electromagnetic wave the problem is equivalent to the solution of linear algebraic equations system with four equations on each boarder. In general the dimension of linear algebraic equations system is 4(m + 1), where m is the number of layers. In case of anisotropic media the problem must be solved for both TE and TM polarizations simultaneously, the coefficient matrix of differential equations system for each layer doesnt have zero blocks.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):104-106
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Automatic Leading Indicator Method in Macroeconomic Forecasting
Abstract
The Automatic Leading Indicator Method (ALI) is used for forecasting main macroeconomic indices of CIS countries.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):107-109
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On Stable Solution for a Mixed Boundary Value Problem for Laplace Equation with the Approximately Defined Boundary
Abstract
A non-stationary heat conduction equation treated as an incorrect Cauchy problem is considered. Temperature field is given on an arbitrary surface. The continuation of that temperature field toward heat sources is performed.
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):110-112
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Our authors
Abstract
Discrete and Continuous Models and Applied Computational Science. 2010;(2.1):113-114
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