Pavlovskiy Posad, Russia
Pavlovskiy Posad, Russia

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Kulikovskikh I.M.,Samara National Research University
Computer Optics | Year: 2017

This paper considers a problem of improving the accuracy of identifying human activity in buildings based on an ecological feature space. To solve this problem a model of logistic regression was implemented on the assumption of the unstable estimation of logistic regression parameters for near linearly separable classes. To reach a compromise between the presence of outliers and the accuracy of recognition an algorithm of anomaly detection was proposed. Computational experiments confirmed the effectiveness of the algorithm and its theoretical consistency. © 2017, Institution of Russian Academy of Sciences. All rights reserved.

Belokonov I.V.,Samara National Research University
Proceedings of the International Astronautical Congress, IAC | Year: 2016

Samara State Aerospace University (SSAU) is the Russian national research university, leading in the field of aerospace technology. Now students from 52 countries are studying at SSAU. SSAU implements technology project-based education "teaching through research" in which students are involved in the educational process via participation in real projects Over the past five years in SSAU actively developing directions designing and creating of scientific and educational micro/nanosatellites and GNSS technologies. Now in orbit there are two scientific micro satellites AIST-1, launched in 2013 by Samara carrier rocket "Soyuz". SSAU has ground control center that operates the group of micro satellites by students and young researchers. In SSAU designed CubeSat 3U platform, complete with its own on-board subsystems, created the first nanosatellite SamSat-218D, which will be orbited in April this year during the first launch from the new Russian cosmodrome Vostochny. At present, work on the second nanosatellite SamSat-QB50 in the framework of the international project QB50 is being completed. In the future will be designed nanosatellite for Earth observation and constellation of nanosatellites for monitoring of the Earth's ionosphere, maneuvering unit for implementation of formation flight mission. With the support of the Samara Region Government established a Center for testing and developing of nanosatellites. This activity is supported by a two-year master's program "Space Information Systems and Nanosatellites" and the International Summer Space School "Future Space Technologies and Experiments in Space" in which involved young people from developing countries. Since 2005 SSAU carried out space experiments in the field of GNSS technologies. Currently implemented two GNSS master's programs in the English language, as well as PhD training mainly for students from developing countries. In February, at the session of the Scientific and Technical Subcommittee of UNOOSA in Vienna SSAU has made some proposals to expand the opportunities for students from developing countries to participate in research and educational activities in the field of GNSS technologies and nanosatellites. Copyright © 2016 by the International Astronautical Federation (IAF). All rights reserved.

Sobolev V.,Samara National Research University
Journal of Physics: Conference Series | Year: 2017

The aim of the paper is to describe the special critical case in the theory of singularly perturbed optimal control problems. We reduce the original singularly perturbed problem to a regularized one such that the existence of slow integral manifolds can be established by means of the standard theory. We illustrate our approach by an example of control problem. © Published under licence by IOP Publishing Ltd.

Shchepakina E.,Samara National Research University
Journal of Physics: Conference Series | Year: 2017

The paper deals with the problem of a construction of global stable/unstable slow integral manifolds of the singularly perturbed systems in critical cases. In addition to the well-known critical cases a novel scenario of the stability change of the slow integral manifold is considered. All three critical cases leading to the change of the stability are discussed via the Hindmarsh-Rose dynamic model. It is shown that the suitable choice of the additional parameters of the system yields the slow integral manifold with multiple change of its stability. © Published under licence by IOP Publishing Ltd.

Mezhenin A.V.,Samara National Research University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2017

The two-level generation model has been applied to analyze the dependence of power efficiency of chemical oxygen-iodine laser (COIL) and electric oxygen-iodine laser (EOIL) on three dimensionless similarity criteria: residence-to-extraction time ratio γd, gain-to-loss ratio ∏ and relaxation-to-excitation rate ratio Γ. Power efficiency is represented as the product of two factors - the medium extraction efficiency and the extraction efficiency of resonator - each being a function of the ∏. The dependences of the similarity criteria γd and ∏ optimal values on the kinetic and optical losses have been found. At low kinetic and optical losses, it is expedient to work with high values of γd and ∏ respectively. It has been found that maximum power efficiency is achieved when ∏=3-8 for COIL and ∏=9-17 for EOIL at the typical γd and optical losses rate. © 2017 SPIE.

Denisova A.,Samara National Research University
Communications in Computer and Information Science | Year: 2017

This article continues studies of probability anomaly detector method which was presented in author’s previous works. Here two implementations of this method are introduced. The implementations are based on different vector quantization algorithms. Description of both algorithms and results of experimental research of their parameters are provided. Both implementations are compared with well known RX anomaly detector on synthetic hyperspectral images. © Springer International Publishing AG 2017.

Kuznetsov A.,Samara National Research University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

Copy-move attack is one of the most popular digital image forgery attacks. The main problem is that existing studies do not provide high detection accuracy with low computational complexity. High complexity of existing feature based solutions makes impossible to use them for large remote sensing snapshots analysis. In this paper there is proposed a copy-move detection algorithm based on perceptual hash value calculation. Hash values are evaluated using the result of binary gradient contours computation. The proposed solution showed high detection accuracy and low computational complexity for copy-move detection in remote sensing data. © Springer International Publishing AG 2016.

Blatov V.A.,Samara National Research University
Structural Chemistry | Year: 2016

A method for analysis of geometrical and topological properties of crystal structures, which contain one-periodic (chain-like) structural units, is proposed and implemented as a computer procedure into the program package ToposPro. The method is based on representation of the set of parallel chains as two kinds of two-periodic nets: rod net, which characterizes the way of linking the chains with each other, and rod packing net, which describes the method of spatial arrangement of the chains irrespective of their interconnections. The geometrical (Domains method) and topological criteria are formulated to construct rod nets and rod packing nets from the initial crystallographic data. It is shown that rod packing net formalizes earlier classifications of rod packings in crystals. Examples are presented, which demonstrate the applications of the method to one-periodic coordination polymers, metal–organic frameworks, and hydrogen-bonded molecular crystals. © 2016 Springer Science+Business Media New York

Frolov V.,Samara National Research University
MATEC Web of Conferences | Year: 2016

The paper presents an overview of results for wing-body interference, obtained by the author for varied wing-body combinations. The lift-curve slopes of the wing-body combinations are considered. In this paper a discrete vortices method (DVM) and 2D potential model for cross-flow around fuselage are used. The circular and elliptical cross-sections of the fuselage and flat wings of various forms are considered. Calculations showed that the value of the lift-curve slopes of the wing-body combinations may exceed the same value for an isolated wing. This result confirms an experimental data obtained by other authors earlier. Within a framework of the used mathematical models the investigations to optimize the wing-body combination were carried. The present results of the optimization problem for the wing-body combination allowed to select the optimal geometric characteristics for configuration to maximize the values of the lift-curve slopes of the wing-body combination. It was revealed that maximums of the lift-curve slopes for the optimal mid-wing configuration with elliptical cross-section body had a sufficiently large relative width of the body (more than 30% of the span wing). © 2016 The Authors, published by EDP Sciences.

Blatov V.A.,Samara National Research University
Structural Chemistry | Year: 2016

A short introduction is given to the special issue dedicated to Academician Vladimir Ya. Shevchenko on the occasion of his 75th birthday. The guest editor tells briefly about his first meeting and subsequent long, close, and fruitful collaboration with Prof. Shevchenko. The main scientific interests and achievements of Prof. Shevchenko are outlined. © 2016 Springer Science+Business Media New York

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