https://elib.bsu.by:443/handle/123456789/170187 NPCS Vol.19, no.1, pp. 1-106 (2016) Mon, 20 Apr 2026 08:06:11 GMT 2026-04-20T08:06:11Z https://elib.bsu.by:443/handle/123456789/170490 Заглавие документа: Application of Antijamming Robust Analysis Method for Selenocentric Reference Net Building Авторы: Nefedyev, Y. A.; Bezmenov, V. M.; Demin, S. A.; Andreev, A. O.; Demina, N. Y. Аннотация: The solution of the problem about defining some physical, geometrical, biological, economical etc parameters from measurements involves a lot of data processing. These data arrays are formed by modern technologies and measurement systems during space and ground physical and biological experiments; photogrammetric, geodetic, astrometric, navigation measurements and others. This paper presents the possibility of using antijamming analysis for long time series of selenodetic observations. Development of this method is caused by active exploration of the Moon that involves creation of precession coordinate-time provision to build navigation selenocentric coordinate system and to create digital lunar maps. Using the alternative approaches to solve estimation problem of the parameters – classic least square method and antijamming analysis – we present the results of comparative analysis for dynamical coordinates of 10 craters on lunar surface. Fri, 01 Jan 2016 00:00:00 GMT https://elib.bsu.by:443/handle/123456789/170490 2016-01-01T00:00:00Z https://elib.bsu.by:443/handle/123456789/170489 Заглавие документа: Stable States of Ferroelectric Smectic C* Liquid Crystal Confined between Patterned Surfaces Авторы: Kudreyko, Aleksey A.; Migranov, Nail G.; Migranova, Dana N. Аннотация: In this study we consider equilibrium states in a monolayered sample of ferroelectric smectic C∗ confined between two differently patterned substrates with strong anchoring under the applied electric field. By using the continuum theory for a "bookshelf" aligned sample of ferroelectric liquid crystal, we obtain elliptic sine-Gordon equation. It is shown that due to the patterned structure of the substrates, competing boundary conditions in the thin film generate a specific alignment of liquid crystals, which can be controlled by the electric field. This theoretical finding is described as a system with harmonically coupled atoms with an external potential within the framework of the Frenkel-Kontorova model. Fri, 01 Jan 2016 00:00:00 GMT https://elib.bsu.by:443/handle/123456789/170489 2016-01-01T00:00:00Z https://elib.bsu.by:443/handle/123456789/170488 Заглавие документа: Lepton Pair Production and Two Boson Mechanism Авторы: Gilewsky, V. V. Аннотация: Resent interest to the so called two-photon mechanism of lepton pair production in pp collision forced this investigation. Using computer algebra system the Drell-Yan-like lepton pair production is analyzed in e+e−-annihilation and then in quark-antiquark subprocess. In Standard model the two-boson mechanism is in the next order of perturbation scheme and gives negligible correction to lowest order tree diagrams. So, only very special kinematics, which is not pointed by authors of publications, can draw attention to the two-boson mechanism. Fri, 01 Jan 2016 00:00:00 GMT https://elib.bsu.by:443/handle/123456789/170488 2016-01-01T00:00:00Z https://elib.bsu.by:443/handle/123456789/170487 Заглавие документа: Parametric Resonance in the Logistic Equation with Delay under a Two-Frequency Perturbation Авторы: Bykova, N. D.; Glyzin, S. D.; Kaschenko, S. A. Аннотация: The logistic equation with delay feedback circuit and with periodic perturbation parameters is considered. Parameters of the problem (coe cient of linear growth and delay) are chosen close to the critical values at which cycle is bifurcated from equilibrium point. We assume that these values have double-frequency relation to the time and the frequency of action and doubled frequency of the natural vibration are close. Asymptotic analysis is performed under these assumptions and leads to a two-dimensional system of ordinary di˙erential equations. Linear part of this system is periodic. If the parameter that defines frequency detuning of an external action is large or small we can apply standard asymptotic methods to the resulting system. Otherwise numerical analysis is performed. Using results of numerical analysis, we clarify the main scenarios of phase transformations and find the region of chaotic oscillations. It is main conclusion that in the case of parametric resonance the dynamics of the problem with double-frequency perturbation is more complicated than dynamics of the problem with single-frequency perturbation. Fri, 01 Jan 2016 00:00:00 GMT https://elib.bsu.by:443/handle/123456789/170487 2016-01-01T00:00:00Z