bluuebunny/crossref_metadata_2025_split huggingface dataset:
Probabilistic finite modeling of stochastic estimation of image inter-frame geometric deformations
Authors: Tashlinskii A G , Safina G L , Kovalenko R O 
Published: November 2019

Abstract
The paper proposes an approach to probabilistic finite modeling of the process of stochastic estimation of the parameters of interframe geometric deformations of images. As the quantities characterizing the state of the stochastic procedure at each iteration of the estimation, the demolition probabilities of the formed parameter estimates (improvements, deterioration, or no change in the vector of estimates in the parameter space) are used. At the same time, the models of images and noises are given by probability distribution densities and autocorrelation functions. This made it possible to simplify the description of a complex set of factors influencing the formation of estimates. The use of adaptive limitation of the parameter space used for modeling reduces the computational cost several times while maintaining the adequacy of the model. In practice, probabilistic modeling can be used to find the accuracy and probability characteristics of stochastic algorithms for estimating interframe deformations of images for a given number of iterations.
Visual product recommendation using neural aggregation network and context gating
Authors: Demochkin K V , Savchenko A V 
Published: November 2019

Abstract
In this paper we focus on the problem of user interests’ classification in visual product recommender systems. We propose the two-stage procedure. At first, the visual features are learned by fine-tuning the convolutional neural network, e.g., MobileNet. At the second stage, we use such learnable pooling techniques as neural aggregation network and context gating in order to compute a weighted average of image features. As a result we can capture the relationships between the products images purchased by the same user. We provide an experimental study with the Amazon product dataset. It was shown that our approach achieves a F1-score of 0.90 for 15 recommendations, which is much higher when compared to 0.66 F1-measure classification of traditional averaging of the feature vector.
Subjective modeling of image shape
Authors: Chulichkov A I 
Published: November 2019

Abstract
The paper presents two approaches to subjective modelling incomplete and uncertain information about possible shape of images. The shape is understood as a set of images of the scene, recorded under all possible conditions (lighting, exposure, etc.). To simulate the likelihood, the measure of likelihood introduced by Yu.P. Pytyev is used. This measure is a function defined on a set of statements and ordering them according to plausibility. The obtained subjective models of shapes allow using the theory of optimal strategies for solving morphological problems.
Promotion of Russian scientific journals into the international databases through the example of the Computer Optics journal
Authors: Zhilavskaya I V 
Published: November 2019

Abstract
The article is devoted to the issues of promoting Russian scientific journals in the international research area, it describes the historical prerequisites for the recognition of the Russian scientific school by the world scientific community, and provides some characteristics of the national peculiarities of the Russian research culture. Particular attention is paid to the difficulties associated with the fact that some Russian researchers underestimate the necessity for the Russian scientific journals to enter the international databases, the need to increase the citation index of scientists and publish their works in English. The result of this situation is a certain scientific isolationism and Russia’s lagging behind the world trends. The relevance and effectiveness of international scientific integration is shown through the example of the Computer Optics journal. The fundamental points are emphasized that allowed this journal to gain high prestige among the scientists working in the field of computer optics and image processing all over the world. These points include, in particular, compliance with the international standards for reviewing the articles and with the rules of publication ethics, high level of scientific publications, compliance with the requirements for the format of articles and the openness policy. All the above, together with the strategic planning, efficient organization and regulation of the publishing process allowed the journal to achieve good performance in the international scientometric databases Scopus and Web of Science.
Application of spinning electrodynamic tether system in changing system orbital parameters
Authors: Lu H , Zabolotnov Y M , Li A 
Published: November 2019

Abstract
Spinning electrodynamic tether system is known to be promising in many applications, including space debris removal, transportation missions, changing orbital parameters of spacecrafts and so on. Feasibility of spinning electrodynamic tether system for changing system orbital parameters is analysed in this paper. The main advantage of spinning electrodynamic tether system is the stability of its movement under the action of perturbations. However, when the conductive tether spins in a magnetic field, the Lorentz force constantly changes its direction, which leads to the need to develop special control methods that ensure desired change in system orbital parameters. In this paper, control laws are proposed for changing the semi-major axis and the eccentricity of the orbit, which take the change of tether spatial position into account. To change the semi-major axis, the current is regulated by the cosine law. To change the eccentricity of the orbit, the onboard power system provides a given amount of current when the system is near the apogee and perigee of the orbit. The combination of executing both manoeuvres at the same time is also studied. The numerical results show that the proposed laws enable spinning electrodynamic tether system to change the parameters of the orbit to the desired values.
Status of creation of hardware-software complex of automatic control of the insulin delivery
Authors: Tutubalin P , Novikova S , Semenova A , Komissarova E , Arutyunova N , Sotnikov S , Alexandrov A 
Published: November 2019

Abstract
The article discusses issues related to the prospects for the implementation of the idea of creating a hardware-software complex for automated regulation of insulin delivery. Today, there are drugs that allow people to live relatively comfortable even with the m ost serious types of diabetes. The m ain difficulty of insulin therapy is the need for consistency (at any time, day or night) of carrying out the control and regulation the infusion of the drug into the patient’s body. Unfortunately, not all patients are able to perform it properly. The ideal solution could be a system that performs all these actions automatically without the participation of the patient. Therefore, the implementation of the idea of creating a hardware-software system for automatic regulation of insulin delivery using the program-adaptive control scheme is relevant. The article forms the general requirements for an approach capable of providing safe medical care for people with type 1 diabetes. There are requirements for the hardware-software complexes of automatic regulation of insulin delivery must correspond are formulated. Also the block diagram is presented.
Structures of absolutely invariant measuring systems and conditions for their physical realizability
Authors: Nesterov V N , Li A R 
Published: November 2019

Abstract
The synthesis method for creating invariant measuring transducers and systems is presented. The method is based on the principle of double channeling, which was proposed by academician Petrov B.N. The advantage of this method is that it allows compensating disturbing influences. The system is influenced by disturbing factors through two symmetrical channels. The efficiency of this method is illustrated by dual-channel Nesterov measuring bridge. Moreover, the entire class of dual-channel measuring transducers was designed based on this method. This class of dual-channel measuring transducers includes measuring bridges and voltage dividers. Dual-channel systems have significant advantages over their standard equivalents.
Nutational oscillations suppression in attitude dynamics of spacecraft by relative motion of its movable module
Authors: Doroshin A V , Eremenko A V 
Published: November 2019

Abstract
Attitude dynamics of a spacecraft with a movable module on retractable beams are considered. The movable module is attached to the main body of the spacecraft by retractable beams of variable length. The spacecraft main body contains a simple jet-engine with constant thrust. The retractable beams can tilt the movable module relatively the main part of the spacecraft, which shifts the position of the mass center. The control scheme of the nutation oscillations suppressing is constructed. This control scheme uses the impulses of the jet-engine on intervals of positive values of the equatorial component of the spacecraft angular velocity at the constant angular displacement of the movable unit. The main aim of this work is to develop the simplest control algorithm, which can be applied in cases of simple constructional forms of the small spacecraft with primitive equipment, including nano-satellites, that is economically profitable and can be used in more space missions.
Representation and simulating of extended Markov chains over a finite field with a predefined precision
Authors: Eminov B F , Zakharov V M , Shalagin S V 
Published: November 2019

Abstract
A method is proposed for representing and simulating the extended Markov chains of a defined type by minimal polynomials over finite field GF(q). Simulation problem is being solved as a problem of constructing the minimal polynomial over field GF(q) using the Berlekamp-Massey algorithm. The polynomial produces a sequence of the length of N. A stochastic matrix relevant to that sequence approximates the given stochastic matrix of an extended Markov chain with a predefined precision proportional to the 1/N value. The polynomial constructed defines unambiguously the structure of a q-ary linear shift register for simulating extended Markov chains. The method allows constructing the implementations of this class of Markov sequences on linear q-ary shift registers with a pre-defined “linear complexity” defined by the value of N.
The van der Pol oscillator under hysteretic control: regular and chaotic dynamics
Authors: Semenov M E , Reshetova O O , Sobolev V A , Solovyov A M , Meleshenko P A , Bogaychuk A N 
Published: November 2019

Abstract
In this work we provide the novel hysteretic approach to control the chaotic dynamics of the van der Pol oscillator under periodic excitation. Using the phenomenological Bouc-Wen model, as well as in the frame of the small parameter approach we investigate the influence of the hysteretic control to the dynamical characteristics of this system. Based on the analysis of numerical results in the form of bifurcation diagrams and Lyapunov exponents, the efficiency of the stabilizing role of the hysteretic control element is established. In addition, we investigate the synchronization of oscillations in the system of coupled van der Pol oscillators (with “simple” linear coupling, as well as under hysteretic control). The stabilizing role of the hysteretic control in this case is also demonstrated.
The simulation results of the operation of a small spacecraft motion control system with an electrothermal microdrive
Authors: Belousov A I , Sedelnikov A V , Gorozhakina A S 
Published: November 2019

Abstract
The work simulates the operation of the motion control system of a small spacecraft. The main Executive body of this system is the engine-flywheel. It is proposed to use an electrothermal micro-motor to reduce the kinetic moment of the flywheel motor. In emergency situations, it can be used as the main Executive body of the management system. A comparative analysis of the advantages and disadvantages of using magnetic actuators and electrothermal micro-motor to reduce the kinetic moment of the flywheel motor. Conclusions are drawn on the feasibility of their application for various small spacecrafts.
Method for modeling of Spacecraft onboard apparatus and building of consistent control logic with limited onboard resources
Authors: Tyugashev A A , Sygurov Yu M 
Published: November 2019

Abstract
The paper is devoted to the method for building consistent spacecraft onboard control logic in case of limited available resources. The consistent onboard control logic is extremely important for the success of a space mission. The special aspect of the complexity of control logic related to limited available onboard resources – electric energy, computer power, etc. The paper introduces the mathematical models for onboard resources, equipment and devices, and their working modes. Also, we present some prototypes of software tool allowing automated checking of control logic whether they violate the resource constraints as well as the design of new control logic from scratch
The effect of climber initial velocity on orbital space elevator dynamics
Authors: Aslanov V S , Ledkova T A 
Published: November 2019

Abstract
This research is devoted to the problem of delivering a small payload to the Earth from the orbit using an orbital space elevator, which consists of two space stations connected by a massless tether and a passive climber moving along the tether. The aim of the work is to study the possibility of transferring the climber from one end of the orbital elevator to the other end due to its initial velocity. The mathematical model of the mechanical system is constructed using the Lagrange equation of the second kind. An analytical expression, which depends on the parameters of the mechanical system and determines the required initial velocity, was found using a simplified mathematical model that does not take into account the bending of the tether. The validity of the expression was verified using the mathematical model. The analysis of the system motion was carried out, and recommendations on its mass-geometric parameters choice were given.
An approach for generating and detecting the signals with the given orbital angular momentum for wireless communication systems
Authors: Grakhova E P , Meshkov I K , Abdrakhmanova G I , Bagmanov V Kh , Vinogradova I L , Gizatulin A R , Kuk I A , Sultanov A Kh 
Published: November 2019

Abstract
The paper is devoted to the development of methods for increasing the efficiency of wireless communication channels via the usage of multiplexing by the orbital angular momentum (OAM). This wave property allows us to form an additional basis of orthogonal functions for the simultaneous independent transmission of several signals. In particular, we propose the uniform circular antenna array (UCA) operating in the 77 – 78.5 GHz frequency range designed to generate radio beams with various orders of the OAM without changing its configuration. The important points in the UCA’s design process were ensuring the minimum divergence of the beam during the propagation and obtaining the maximum gain. Regarding the OAM radio beams receiver, we propose a solution for detecting an OAM signal in case of misalignment between transmitting and receiving antennas. An antenna array consisting of two perpendicular dipoles is employed as a receiving device, providing the OAM signal reception from any direction. An important point of signal detection is the preservation of the information about the phase of the received signal. Finally, we demonstrate the simulation results of OAM signal transmission and reception.
Development of a mathematical model of molecular-selective gas transfer in a hybrid membrane-adsorption oxygen concentrator
Authors: Tishin A A , Gurkin V N 
Published: November 2019

Abstract
Most modern oxygen concentrators use sorption air separation technology. The development of a hybrid membrane-sorption separation technology can improve the energy efficiency of the process. The paper considers a mathematical model of molecular-selective gas transfer in a hybrid oxygen concentrator consisting of adsorption and membrane units combined into a circulation loop. The considered hybrid model has based on a model of equilibrium isothermal sorption with linear isotherms without longitudinal mixing for numerical calculation of the adsorption unit of the system and a model of ideal displacement in the high-pressure cavity with perpendicular outflow in the low-pressure cavity to calculate the system membrane unit. In the course of the study, the high adequacy of the model was obtained with an experiment in the range of oxygen concentrations up to 90%, and a comparison was made with previously obtained results. A new model has been proposed that can take into account the equalization and countercurrent blowing stages.
The influence of the ignition conditions of the SH-synthesis of intermetallic compounds on the combustion parameters of the Ti-15.82wt.%Al composition: computer simulation and computing experiments
Authors: Jordan V I , Shmakov I A 
Published: November 2019

Abstract
Computational experiments (CEs) have been carried out to simulate the propagation of the combustion wave of the SH-synthesis process in a package of alternating layers of nanoscale crystal lattices of Ti and Al atoms by molecular dynamics method. The interatomic interaction potential in the embedded atom model (EAM) was used in the LAMMPS package. Using the LAMMPS configuration with parallel computing, the following results of CEs were obtained: sets of temperature profiles along the layers of the structure at successive instants of time (up to 16 ns) and the corresponding sets of snapshots (vertical cross-sections of the atomic arrangement along the layers), as well as a tables with the number and percentage of the content of various types of elementary cells (fcc, hcp, bcc, other) at the same instants of time. The influence of the initiation’s conditions of the SH-synthesis of intermetallic compounds on the combustion parameters of the nanoscale layered Ti-15.82wt.%Al composition was showed. The ignition conditions of SHS that are provided the stable motion of the combustion wave in the SHS-sample were determined. And the ignition conditions of SHS with dominance of either TiAl or Ti3Al phase formation in the SHS products was also determined.
Modeling of phonon diffusion using a Monte-Carlo method based on physics of phonon
Authors: Khvesyuk V I , Qiao W , Barinov A A 
Published: November 2019

Abstract
Modern studies of heat transfer in semiconductor and dielectric structures (integrated circuits, etc.) are based on the analysis of the interaction of quasi-particles called phonons – quanta of elastic waves propagating inside the crystal lattice. In this paper, it is shown that to describe the diffusion it requires a detailed analysis of the physics of phonons interactions. Firstly, we formulated a method to perform a phonon diffusion calculations which takes into account the peculiarities of phonon interaction. Secondly, we developed a brand-new algorithm, which allow to carry out a computer simulation of phonon diffusion. Obtained results are necessary both for a deeper understanding of the processes of heat transfer, and for future calculations of the contact thermal resistances and phonon scattering on the boundaries – the relevant problems of heat transport in nanostructures.
Development of a mathematical model of operation forming with discounting assumption about the flat-deformed state
Authors: Demyanenko E G , Kosolapova A Yu 
Published: November 2019

Abstract
For development and improvement, technological processes are a necessary strict analysis of the maximum numbering factors most strongly influencing the deformation process and flat-deformed strain state procurement blank. When determining the strained and deformed conditions of blank lead the admission about the flat-deformed state, which ensures the minimal thickness variation thin-walled detail by forming process. In this article, the complex method of researches including the theoretical analysis and check of the entered condition in the program ANSYS complex is used.
Model for discrete optimal control of the enterprise’s financial processes
Authors: Orlova E V 
Published: November 2019

Abstract
We consider a problem of financial resources planning where the processes of financial flows coordination of an enterprise under uncertainty are described with the discrete optimal control approach and methods of dynamic programming. We give a critical survey of theoretical and methodological approaches for financial resources planning problem. The financial flows dynamics is modelled with using the methods of system analysis, control theory, optimal control and methods of data processing under uncertainty. The model for the financial flows distribution has been developed. It uses the principles of optimal dynamic control under the criterion of cumulative non-payment risks and transaction and opportunity costs minimizing. The practical significance of the developed model is in its application for the financial planning in the enterprises that allows to improve its financial planning quality and to increase its management and operational efficiency.
Modeling of brightness temperature in biological tissue
Authors: Polyakov M , Levshinskii V , Khoperskov A 
Published: November 2019

Abstract
Microwave radiothermometry is a passive and non-invasive technique which is used to measure the depth temperature of biological tissue. The method of microwave radio thermometry is based on measuring the intensity of the own electromagnetic radiation of the internal tissues of the patient in the ultra-high frequency range. The temperature measured by the instrument is called brightness. Modeling the brightness temperature is carried out to research the effectiveness of the method of medical diagnostics based on microwave radiothermometry data. A mathematical model of the distribution of the electromagnetic and temperature fields in the mammary gland was built. A numerical simulation of the electromagnetic and temperature fields for models differing in internal structure was carried out. The structure of the mammary gland is a multicomponent, heterogeneous environment and consists of the following types of biological tissues: skin, adipose tissue, muscle tissue, milk lobules, blood flow. The contribution of the electromagnetic field to the formation of the brightness temperature was determined. The dependence of the brightness temperature on the radius of the tumor is presented.
Numerical optimization of geometric configuration of large space structure
Authors: Anshakov G P , Salmin V V , Peresypkin K V , Chetverikov A S , Tkachenko I S 
Published: November 2019

Abstract
The paper considers a development project of an observation satellite with diffractive optical system. The problem of stable orientation of the optic system elements is being solved. The design layout suggested by the authors earlier is used for the purpose. The authors studies influence of geometrical parameters on stiffness of the design. With the help of numerical optimization optimal values of design parameters are found, optimized for minimum of mass.