Source: https://ntv.ifmo.ru/en/summary/967/summary.htm
Timestamp: 2019-04-21 00:44:01+00:00

Document:
TO THE ANNIVERSARY OF ALEXANDER LVOVICH FRADKOV	Nikiforov Vladimir O, Bobtsov Alexey Alexeevich, Matveev A. S., Proskurnikov A.V., Andrievsky Boris R.
DEPENDENCE OF SPECTRAL CHARACTERISTICS OF SEMICONDUCTOR AND SOLID STATE LASERS OF VISIBLE RANGE ON ACTIVE ENVIRONMENT TEMPERATURE Adamov Anton A. , Baranov Mikhail S. , Khramov Vladimir N.
SPECTRAL SENSITIVITY STABILITY ESTIMATION OF DIGITAL COLOR CAMERAS Pushchin Alexey V.
ENEGETIC EFFICIENCY ASSESSMENT OF SPECTRAL COHERENCE TOMOGRAPH OPTICAL-ELECTRONIC SYSTEM	Gurov Igor P, Pimenov Aleksey Yu.
Subject of Research.The paper considers the methods of optical coherence tomography (OCT) based on illuminating a sample by optical radiation with subsequent determination of light reflection degree through a sample depth. Illumination method defines basic characteristics of OCT system such as sensitivity and speed in studies of biological samples. In mechanical scanning-free OCT systems, line- and full-field illumination methods are applied utilizing object illumination by laser source with tunable wavelength. The study is aimed at energetic efficiency quantitative assessment of line-field OCT system with tunable radiation source and in comparison of line-field illumination method with full-field one. Method. Based on the model of OCT optical system, ray tracing has been carried out, and spatial distribution of energy reflected from a sample and registered by photo detector has been determined. Photoelectrical signal and signal-to-noise ratio have been evaluated.Main Results. It has been shown that line-field OCT system providessignificantly higher sensitivity (97 dB) compared to full-field system (78 dB). In addition, line-field system allows obtaining B-scan without moving of mechanical parts. Original scheme of lighting channel has been proposed providing uniform illumination spatial distribution along lighting line without sensitivity decay near edges of image field. Practical Relevance.The obtained results can be applied for creation of compact real-time spectral OCT system.
ADAPTIVE ROBUST DISTURBANCE COMPENSATION IN LINEAR SYSTEMS WITH DELAY Paramonov Alexey V.
ROBUST STABILIZATION OF TWIN-ROTOR MIMO PLANT	Zimenko Konstantin Alexandrovich, Kremlev Artem Sergeevich, Polyakov Andrey E., Efimov Denis V.
POROUS STRUCTURE AND FUNCTIONAL PROPERTIES OF HIGHLY-PERMEABLE POLYPROPYLENE FILMS Kuryndin Ivan S. , Ivchenko Svetlana I. , Nikolaev Oleg O. , Elyashevich Galina K.
FABRICATION OF ACTIVE ADDITIVE TO SHAMPOOS BASED ON DIFFERENT NATURE NANOPARTICLES Zhukov Mikhail V, Ampilogova Elena A. , Volkova Anzhelika V. , Marchenko Maxim A. , Ishmuratov Danil M. , Korovaytseva Anastasiya E.
LASER SYNTHESIS OF SELENIUM NANOPARTICLES IN LIQUID MONOMERS	Zulina Natalia A, Fokina Maria I, Cherkashina Elizaveta G. , Nosenko Tatiana N.
DESIGN CONCEPTS FOR DIGITAL PROJECT AND PRODUCTION COMPANIES OF INDUSTRY 4.0 STANDARD Guryanov Andrey V, Zakoldaev Danil A., Zharinov Igor Olegovich, Nechaev Vladimir A.
MATRIX-ITERATIVE SOLUTION METHOD FOR SYSTEM OF LINEAR EQUATIONS AND ITS APPLICATION IN SPACE TOMOGRAPHY SCANNING USING RADAR	Samoilenko Marina V.
CROSS-DOMAIN WEB AUTHOR IDENTIFICATION	Vorobeva Alisa A. , Pozvolenko Vitaliy A. , Korobitsyna Anastasiya S. , Sharafiev Azamat A.
The paper is devoted to the cross-domain web author attribution (identification), where user's messages are obtained from several sources (web-sites). We focused on the problem of one web-site user identification by his messages from another web-site. We found that there is a stylistic difference between the texts of messages created by one user on different web-sites. The possibility of a single feature space forming for texts received from various sources was determined providing sufficient accuracy of linguistic identification. Two subtasks were studied: 1) mixed sources – training and test datasets include messages from mixed sources (web-sites); 2) separated sources – the text messages sources of the training and test datasets do not intersect; training dataset includes texts from one source, test dataset includes texts from another.The experiment results showed that identification accuracy in mixed sources task is 0.82. The accuracy in separated sources task is 0.74. It is concluded that there is a stylistic difference between texts created by one user, but on the various web-sites. But at the same time, it is possible to form a single feature space for text messages received from various web-sites, ensuring sufficient identification accuracy.
FACE RECOGNITION SYSTEM FOR PAYMENT PROCESS ON MOBILE DEVICES AND WEB-APPLICATIONS	Ivanko Dmitriy V.
The paper deals with the problem of users' identity authentication during payment transactions with the use of mobile devices and web applications. Standard methods of users' identification are considered at performing a payment transaction. The subjects of discussion are the main criteria for the effectiveness of user identification systems in mobile devices and web applications, such as the identification accuracy of the modern systems, time and computational costs, the ability to distribute computations and user convenience. Particular attention is paid to computational and time costs, as they are the most significant for users who make use of practically applicable client-server mobile and web applications. The advantages and disadvantages of face recognition systems application for users' identification and verification are pointed out. Each system element participating in secure banking transaction is described in the course of the payment transaction. A new client-server model is presented for interaction of the face recognition system for security assurance while shopping with the use of mobile devices or web applications. Experimental estimates of the face recognition systems effectiveness are also given. The developed architecture gave the possibility to reduce the time spent by the client for the transaction by an average of 47%, compared with application of standard user authentication tools.
MODELING OF ETHERNET NETWORKS IN OMNET ++ INET FRAMEWORK MEDIUM	Khabarov Sergey P.
Subject of Research. The paper considers one of the possible approaches to the study of Ethernet networks by simulating them in the OMNeT ++ environment with the use of the INET framework. The possibility of studying network models is shown in both the step-by-step execution mode and the mode of obtaining generalized statistical characteristics of their operation. Method. When presenting the proposed approach, the method of sequential complication of network models was used, taking into account the features of existing standard protocols and network implementations. The simplicity of the proposed approach is shown, which is based on a wide range of ready-made components for the description of various network elements within the INET framework. This fact gives the possibility to form quite complex network models by means of only the graphic editor and the built-in NED network description language. A brief description of INET framework main components is given that makes it possible to form the structure of the network under research in the graphical editing mode. Main Result. The paper presents technique for creation of network simulation models with a sufficiently detailed description of the main modeling stages. The simplest methods for launching the network model into work and analyzing the results are considered. The work shows the possibility of creating custom component modules in the INET framework projects, which, being ready-made components, can be used in models of more complex network structures. Based on the generated approach, models were built of both basic and mixed Ethernet topologies that gave the possibility to carry out a sufficiently detailed analysis for each of these topologies. Practical Relevance. The described toolkit makes it possible to carry out research on the justification of design solutions for design of distributed computer networks, as well as for creation of tools supporting the automated design of infocommunication systems and networks.
STUDY OF COMPUTER VISION ALGORITHMS FOR SPACE TRACKING SYSTEMS IN TYPICAL MODES OF THEIR FUNCTIONING	Zakharova Maria V. , Grygoriy Shmyhelskiy, Grigoriev Valeriy V.
AN ALGORITHM FOR COMPACT FIXED-POINT IMPLEMENTATION OF DIGITAL CONTROLLERS Karimov Timur I. , Solnitsev Remir I. , Denis N. Butusov , Ostrovskiy Valeriy Yu.
SIMULATION MODEL FOR MULTICHANNEL PRIORITY SERVICE OF REDUNDANT DATA TRANSFER SYSTEM Slastikhin Ivan A.
PLATFORM ARCHITECTURE FOR DEVELOPMENT OF MOBILE APPLICATIONS WITH OUTDOOR-QUESTS Mokretsov Roman M. , Zaslavskiy Mark M.
Subject of Research. The paper presents the review of existing platforms for development of mobile applications with outdoor-quests. A method for automation design and planning of outdoor-quests is proposed. The principles for development automation of mobile applications containing such quests are described. Method. The novelty of the proposed approach lies in procedural quest generation based on a set of limitations. The architecture combines the usage of open technologies with quests generation and includes special tools for automated creation of outdoor quest templates on various subjectsas well as customizable application templates. Main Results. Experimental research was carried out for evaluation of the proposed architecture features. By implementing quest generator and application templates a demo Android application was created. The application consisted of two quests: manually created and generated one. The generated quest was made by quest generator and extended by human. The application was published at Play Market Store. The experiment goal was to measure how long will it take for application users to find different quest object and how long will it take to pass the quest all over in order to determine the differences in generated and manually created quests. As a result of comparative measurements a conclusion was made about allowable difference between quests because it was less than attention cycle duration for humans. This fact demonstrates that generated quests can be used in the same manner as manually created ones. Practical Relevance. The proposed quest generator can be used for wide range of topics because quest object selection is based on keyword search and quest route geometry criterion application. The solution also has practical significance because mobile applications developed with the use of the proposed architecture can be adapted to different domain areas. Wherein mobile application development time is reduced owing to automation and customizable templates usage.
STABILITY OF VISCOUS FILM ON SURFACE OF SLIGHTLY INCLINED ROTATING VERTICAL CYLINDER	Melikhov Ivan F.
MATHEMATICAL MODEL OF RESONATOR CHAINS IN EXTERNAL MAGNETIC FIELD Melikhova Alina S.
Subject of Research.The paper considers a spectral problem for chains of weakly coupled ball-shaped resonators under the action of an external magnetic field. Two basic geometries are studied composed of identical resonators: the chain with a single kink and the one with symmetric branching. The vector of magnetic field induction is assumed to be perpendicular to the plane including the centers of resonators that are forming the chain. The delta-like potentials with the same intensity are applied to all contact points. Method. The mathematical model of the chain consisting of identical resonators interacting with each other via a single point is constructed in the framework of the theory of self-adjoint extensions of symmetric operators. The modification of Neumann formulas was used for adjoint operator description. Both systems have a periodicity in parts and the model itself is constructed in such way that it becomes possible to use the transfer matrix approach to obtain the spectrum of the model Hamiltonian. Main Results. The structure of the spectrum for both chains is analytically described; namely, all equations and inequalities are obtained, which give the possibility to find the bands of the continuous spectrum, as well as the energy values ​​related to the discrete spectrum. Numerical simulation clearly demonstrates the structure of the continuous spectrum of the systems depending on the model parameters. Practical Relevance. Since the model has different variable parameters, it can be used to construct real systems that have certain spectral properties. The geometries considered in this paper are the basic elements for the construction of more complex systems.

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