Blagoveshchensk, Russia
Blagoveshchensk, Russia

Amur State University is a university in Blagoveshchensk, Amur Oblast, Russia. Wikipedia.

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Maslovskaya A.G.,Amur State University | Barabash T.K.,Amur State University
IOP Conference Series: Materials Science and Engineering | Year: 2017

The article presents some results of fractal analysis of ferroelectric domain structure images visualized with scanning electron microscope (SEM) techniques. The fractal and multifractal characteristics were estimated to demonstrate self-similar organization of ferroelectric domain structure registered with static and dynamic contrast modes of SEM. Fractal methods as sensitive analytical tools were used to indicate degree of domain structure and domain boundary imperfections. The electron irradiation-induced erosion effect of ferroelectric domain boundaries in electron beam-stimulated polarization current mode of SEM is characterized by considerable raising of fractal dimension. For dynamic contrast mode of SEM there was revealed that complication of domain structure during its dynamics is specified by increase in fractal dimension of images and slight raising of boundary fractal dimension. © Published under licence by IOP Publishing Ltd.

Eremin E.L.,Amur State University | Shelenok E.A.,Pacific National University
2016 Dynamics of Systems, Mechanisms and Machines, Dynamics 2016 | Year: 2016

This article considers the problem of constructing an adaptive control system for nonlinear priori uncertain dynamic object with statement delay and relative order greater than one. As methods of solving the hyperstability criterion and high-speed self-tuning correction unit are used. © 2016 IEEE.

The results of modeling the dynamic charging processes that arise when ferroelectrics are under the action of an electron beam in a scanning electron microscope are presented. Implementation of the model is based on simultaneous solution of the continuity equation and Poisson equation with allowance for the radiation-stimulated intrinsic conductivity of the irradiated sample and with an initial charge distribution determined using the Monte Carlo method. The multidimensional boundary evolutionary problem is solved using grid methods. The model permits one to study the dynamics of the process of the electron-beam-induced charging of ferroelectrics. Estimates for the values of fields generated by charges accumulated during the irradiation process are presented for a set of modeling parameters corresponding to physical data obtained in experimental observations of the polarization switch for a ferroelectric lithium niobate crystal. © 2013 Pleiades Publishing, Ltd.

Kozin V.M.,RAS Institute of Metallurgy | Zemlyak V.L.,Amur State University
Proceedings of the International Offshore and Polar Engineering Conference | Year: 2012

The paper deals with the model experiments for studying wave resistance of a submarine moving under an ice sheet. It is known that the maximum values of wave resistance affecting a submerged body as a result of generating surface waves correspond to the wave mode of propagation in an ice sheet of the flexural gravity waves caused by the motion of a submarine. To study wave resistance, a series of experiments was conducted in a model-testing basin by toeing a model submarine under a model ice sheet with the help of a gravitation towing system. An elastic film was used to simulate the model ice. The wave resistance was found as the difference between complete resistances under small and large depths of submerging the model. The experiments showed that it was not the resonant velocity of the load motion but the velocity of the wave mode of the wave formation that corresponded to the peak of the wave resistance, and the value of the wave resistance caused by the model motion under the ice sheet was higher than that caused by the model motion under the free water surface. The diagrams showing the dependence of wave resistance from various ice conditions are given. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE).

Chibisov A.N.,Russian Academy of Sciences | Chibisova M.A.,Amur State University
Technical Physics | Year: 2011

The influence of Ti and Zr impurity atoms on the atomic and electronic structures of a mesoporous SiO2 matrix is ab initio simulated in a generalized gradient approximation. Energetically favorable positions of titanium and zirconium in the structure are revealed. The incorporation of Zr and Ti ions is shown to decrease the bandgap. © 2011 Pleiades Publishing, Ltd.

Mikhailov M.M.,Tomsk State University | Neshchimenko V.V.,Amur State University | Yuryev S.A.,Tomsk State University
Radiation Physics and Chemistry | Year: 2016

This study carried out an in situ and external investigation on the reflective spectra of micro- and nanopowders titanium dioxide before and after irradiation by 30keV electrons. The particle sizes range from 60-240nm. It was established that the decrease in the particle size leads to an increase in intrinsic defects. The particles with intrinsic defects are then transformed into absorption centers during irradiation as a result of optical degradation of TiO2 powders. High radiation stability has particle sizes range from 80-160nm. © 2015 Elsevier Ltd.

Krasnikov I.,Amur State University
Journal of biophotonics | Year: 2011

Continuous-wave laser micro-beams are generally used as diagnostic tools in laser scanning microscopes or in the case of near-infrared (NIR) micro-beams, as optical traps for cell manipulation and force characterization. Because single beam traps are created with objectives of high numerical aperture, typical trapping intensities and photon flux densities are in the order of 10(6) W/cm(2) and 10(3) cm(-2) s(-1), respectively. The main idea of our theoretical study was to investigate the thermal reaction of RBCs irradiated by laser micro-beam. The study is supported by the fact that many experiments have been carried out with RBCs in laser NIR tweezers. In the present work it has been identified that the laser affects a RBC with a density of absorbed energy at approximately 10(7) J/cm(3), which causes a temperature rise in the cell of about 7-12 °C. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Loseva O.V.,Russian Academy of Sciences | Rodina T.A.,Amur State University | Ivanov A.V.,Russian Academy of Sciences
Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya | Year: 2013

The interaction of freshly precipitated binuclear zinc dithiocarbamate [Zn2{S2CN(iso-C3H7) 2}4] with solutions of AuCl3 in 2 M HCl is studied. The heterogeneous reaction includes the chemisorption of gold(III) and gold(III), coordination compound (H3O[Au3{S 2CN(iso-C3H7)2}6] [ZnCl4]2 · H2O) n (I), are determined by X-ray diffraction analysis. Compound I includes three complex cations [Au{S2CN(iso-C3H7)2} 2]+, two of which (noncentrosymmetric, A) are structurally nonequivalent with respect to the third cation (centrosymmetric, B). The structural self-organization of compound I includes the formation of linear trinuclear fragments [Au3{S2CN(iso-C3H 7)2}6]3+ by three cations (2A and B) due to nonsymmetric secondary Au.S bonds. The interaction between the [Au 3{S2CN(iso-C3H7)2} 6]3+ fragments results in the formation of zigzag polymer products of the thermal transformations are metallic gold and ZnS. © 2013 Pleiades Publishing, Ltd.

Maslovskaya A.,Amur State University | Barabash T.,Amur State University
Ferroelectrics | Year: 2013

The paper describes the results of dynamic simulation of electron beam-induced polarization reversal process in ferroelectrics with a focus on a fractal approach. The methods of fractal analysis were used to estimate the scaling characteristics of TGS-domain structure images and polarization switching current obtained with the SEM. The computer simulation results of domain configuration geometry and corresponding form of switching current are presented. Using modified Kolmogorov-Avrami model, the polarization current was determined taking into account differential equation with fractional derivative. The main features of simulation curve of polarization switching current correspond to experimental data observed. Copyright © Taylor & Francis Group, LLC.

Kezina T.V.,Amur State University
Stratigraphy and Geological Correlation | Year: 2011

The Wuyun deposit of brown coal is situated on the right bank of the Amur River in the People's Republic of China, 35-60 km away from the Arkhara-Boguchan brown coal deposit. The Belaya Gora stratotype of the latter and the southwestern flanks of the Raichikhinsk brown coal field (Russia) have been studied previously when the author analyzed in detail the Danian and Selandian-Thanetian palynoassemblages from the Upper Tsagayan Subformation. A section of the Wuyun Formation was studied at the eponymous deposit in 2002 and 2004. Based on new palynological results and analysis of data from earlier publications, two palynoassemblages distinguished there in the Paleocene coal-bearing succession enable correlation between sections of relevant deposits on the right and left banks of the Amur River. Data on the taxonomic composition of palynoassemblages are considered, and their basic and characteristic taxa are figured in paleontological plates. © 2011 Pleiades Publishing, Ltd.

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