Mozhaisky Military Space Academy

Saint Petersburg, Russia

Mozhaisky Military Space Academy

Saint Petersburg, Russia
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Goncharenko V.A.,Mozhaisky Military Space Academy
SPIIRAS Proceedings | Year: 2016

In this article we consider an approach to representation of distributions of probabilities in the form of the two-level composition of an integral kernel and a phase function which is generalization of the concept of density of random parameter distribution. Possibilities of giper-delta approximation of the phase function and its interrelation with the formation of phase-type distributions are shown. The method of approximating distributions formation on the basis of the arbitrary phase function by the method of derivatives is offered.

Gnidko K.O.,Mozhaisky Military Space Academy
SPIIRAS Proceedings | Year: 2016

In this paper, we propose a formal model of individual and group behavior based on p-adic coordinate system. The model developed allows description and prediction of behavioral reactions of the personnel of critically important objects under conditions of external destructive informational impacts.

Parshutkin A.V.,Mozhaisky Military Space Academy | Maslakov P.A.,Mozhaisky Military Space Academy
SPIIRAS Proceedings | Year: 2017

This article considers the model of impact of non-stationary interference on the satellite communications channels of standard DVB-S and DVB-RCS, and also on the channels with frequency-hopping spread spectrum. The results of the impact of unintentional nonstationary interference on the satellite communications channels, which occurs from stationary and mobile sources of interference with the same average power, were compared. The bit error probability is used as a measure of noise immunity of satellite communications channels. In the article the term time coefficient of the disturbance noise existence was introduced. Its essence is to substantiate the degree of noise energy concentration in some time area of the desired signal. As an indication, characterizing noise immunity of data lines to the influence of unsteady noises the bit-error probability was chosen. It depends on the time coefficient of the disturbance noise existence. In the definite period of time coefficient of the unsteady noise existence for low signal-to-noise ratio they can have a more dangerous effect on data lines with FHSS than the continuous disturbance noise increasing the bit-error possibility.

Sadin D.V.,Mozhaisky Military Space Academy | Lyubarskii S.D.,Mozhaisky Military Space Academy | Gravchenko Y.A.,Mozhaisky Military Space Academy
Technical Physics | Year: 2017

We have reported on the results of a numerical simulation of the inflow of an underexpanded pulsed gas-dispersed jet with a high particle concentration onto a rigid obstacle unbounded in the transverse direction. The characteristic features of such interaction, in particular, the anomalous formation of the shock-wave structure of the two-phase flow at the subsonic velocity of the carrier gas and the evolution of self-sustained oscillations, have been investigated. © 2017, Pleiades Publishing, Ltd.

Novikov P.A.,Saint Petersburg State University | Khomonenko A.D.,Saint Petersburg State University | Yakovlev E.L.,Mozhaisky Military Space Academy
ACM International Conference Proceeding Series | Year: 2015

Indoor Mobile navigation systems are becoming more widespread in many areas (transport, public institutions, logistics and others.). It is becoming popular navigation based on fingerprint radio access points Wi-Fi. As a mechanism for storing and processing the radio fingerprint is often considered a model of artificial neural networks (ANN). The paper examines the main issues related to the creation of complex programs for indoor mobile navigation using neural networks. We justify the choice of AAN learning algorithms for an indoor mobile navigation system. © 2015 ACM.

Gorshkov A.S.,Polytechnic University of Mozambique | Rymkevich P.P.,Mozhaisky Military Space Academy | Vatin N.I.,Polytechnic University of Mozambique
Magazine of Civil Engineering | Year: 2014

This paper shows the influence of mortar joints on the thermal resistance of external walls made of autoclaved aerated concrete blocks. Due to the fact that the thermal conductivity of cement mortars and adhesives is significantly higher than the thermal conductivity of autoclaved aerated concrete products, their effect must be considered when designing the walling. The article contains a table of thermotechnical uniformity coefficients of aerated concrete walls depending on the thickness and thermal conductivity of mortar joints. The work describes the simulation of heat transfer in stationary and non-stationary conditions. In the case of unsteady heat transfer, the influence of masonry joints on the thermal resistance of the enclosing structure was considered. Thermal resistance was characterized by the range of temperatures and the estimated damping of range of temperatures. There was calculated a correction value for the effect of mortar joints on the complex damping coefficient of estimated range of temperatures.

Zhukov V.Y.,Mozhaisky Military Space Academy | Shchukin G.G.,Mozhaisky Military Space Academy
Journal of Communications Technology and Electronics | Year: 2016

The specific features of meteorological radiolocation and its state of the art are discussed. The characteristics of weather radars manufactured by all companies leading in this field are compared. The problems facing weather radars and possible methods of their solution are determined. The further trends inherent to the development of the given field of science and technology are outlined. © 2016, Pleiades Publishing, Inc.

Markov E.,Mozhaisky Military Space Academy
Journal of Applied Remote Sensing | Year: 2016

Unmanned aerial vehicles (UAVs) have become used increasingly in earth surface observations, with a special interest put into automatic modes of environmental control and recognition of artificial objects. Fractal methods for image processing well detect the artificial objects in digital space images but were not applied previously to the UAV-produced imagery. Parameters of photography, on-board equipment, and image characteristics differ considerably for spacecrafts and UAVs. Therefore, methods that work properly with space images can produce different results for the UAVs. In this regard, testing the applicability of fractal methods for the UAV-produced images and determining the optimal range of parameters for these methods represent great interest. This research is dedicated to the solution of this problem. Specific features of the earth's surface images produced with UAVs are described in the context of their interpretation and recognition. Fractal image processing methods for extracting artificial objects are described. The results of applying these methods to the UAV images are presented. © 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).

Sadin D.V.,Mozhaisky Military Space Academy | Aleksashov V.Y.,Mozhaisky Military Space Academy | Varvarskii V.M.,Mozhaisky Military Space Academy | Dobrolyubov A.N.,Mozhaisky Military Space Academy
Technical Physics Letters | Year: 2014

The motion of microparticles interacting with a free molecular gas flow escaping from an orifice has been numerically simulated with allowance for asymptotic properties of the flow. Specific features of collective properties of the ensemble of microparticles and the evolution of uncertainty in the initial conditions of a separate particle are considered. © 2014 Pleiades Publishing, Ltd.

Eremeev M.A.,Mozhaisky Military Space Academy | Gorbachev I.E.,Mozhaisky Military Space Academy
Automatic Control and Computer Sciences | Year: 2015

This paper presents an approach for the information security analysis of automated systems. The random behavior of new vulnerabilities that occur in the automated system in the process of operation is investigated. The formalization required to evaluate information security, which is based on the methods of the stochastic indication theory, is presented. © 2015, Allerton Press, Inc.

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