bluuebunny/crossref_metadata_2025_split huggingface dataset:
On some methods for generating extremely multistable systems
Authors: Burkin I M , Kuznetsova O I 
Published: November 2019

Abstract
A multistable dynamic system can demonstrate solutions with fundamentally different behavior depending on the choice of their initial conditions, which poses a threat to its use in practical engineering applications. On the other hand, the system’s multistability may be its undisputed advantage when it is used, for example, to hide information in communication systems and audio encryption schemes to improve the performance of secure communications, since in this case a special choice of initial conditions can play the role of a “secret key”. In this paper, we propose some approaches to the generation of extremely multistable systems containing an infinite number of attractors using mathematical models of systems in Lurie form.
Numerical simulation of high-speed AIIIBV photodetectors within drift-diffusion approximation
Authors: Pisarenko I V , Ryndin E A 
Published: November 2019

Abstract
This paper is focused on a fundamental scientific and technical problem of research and development of high-performance on-chip interconnections for next-generation integrated devices of micro-, nano- and microwave electronics. Previously we proposed an injection laser with functionally integrated optical modulator and double heterostructure, which can be used as an efficient source of light for on-chip optical interconnections. To detect short laser pulses generated by the laser-modulator, a high-speed and technologically compatible photodetector is required. In this paper we develop the non-stationary drift-diffusion model of transient processes in high-speed photodetectors, algorithms of its numerical implementation and applied software intended for one- and two-dimensional simulation of photosensitive optoelectronic devices with various structures. According to the obtained results of drift-diffusion numerical simulation, it is reasonable to research the methods of carrier lifetime reduction in the active regions of photodetectors for on-chip optical interconnections.
Simulation of thermoelectric processes in the semiconductor structure of a solar cell
Authors: Hodakov A M , Smirnov V I , Sergeev V A , Gavrikov A A 
Published: November 2019

Abstract
The paper describes a solar cell thermoelectric model with taking into account the nonlinear temperature dependence of the thermal power density. The temperature distribution in the structure and dependence of the p–n junction overheating on the heating current are reviewed. The results obtained by the modeling and the results obtained with the original apparatus for measuring the thermal resistance of solar cell are compared.
On the results of processing of the telemetry data received from the “AIST” small satellite constellation
Authors: Ivanushkin M A , Tkachenko I S , Safronov S L , Kaurov I V , Volgin S S 
Published: November 2019

Abstract
The article presents the result of the processing of the telemetry data obtained from the “AIST” small satellite constellation. The results of processing telemetry data, obtained during emergency situations on board of the satellites were presented. The influence of the light-dark cycle on the power balance of the satellites was analyzed. The factors affecting the thermal regime of a spacecraft were considered. As a result, the simulation of the thermal conditions of the small satellites was carried out. Then a comparison of the results obtained with the telemetry data was carried out. Thus, the most suitable coating for the processing of honeycomb panels was determined, which reduced systematic overheating, then the imperfection of the procedure for conducting thermal vacuum tests was identified, and finally, recommendations for improving the thermal performance of small satellites “AIST” were formulated.
Mathematical modeling of a multistage electrolysis plant for producing heavy and light water
Authors: Alexandrov R A , Laguntsov N I , Tikhonov S N 
Published: November 2019

Abstract
The work is devoted to the simulation of a multi-stage separation cascade of electrolyzers, designed to produce heavy water as the main product while producing light water as a by-product. The calculation is based on the model of an ideal countercurrent separation cascade without mixing at the entrance to each stage, in which one of the cut coefficients can be chosen arbitrarily in the range of its allowable values, and the value of which is an optimization parameter. It is assumed that taking into account the optimization of the design of the electrolyzer and taking into account energy recovery, the cost of light water will be about $ 0.09/kg, and the cost of heavy water about $ 945/kg.
Influence of radiation defects in a semiconductor structure on the electric field distribution in the air gap of the gas-discharge chamber
Authors: Petrov M A , Phylonin O V , Galanin A A 
Published: November 2019

Abstract
We have proposed and analyzed a theoretical model of the influence of a semiconductor structure both without radiation defects and with their presence on the EMI profile in the air gap of the gas-discharge chamber near the surface of the structure. We have carried out mathematical modeling and comparison of the electric field distribution in the gap for the “ideal” structure (without defects) and structures with a single defect at different depths of its occurrence. A transistor was chosen as the semiconductor structure. We have demonstrated a possibility in principle of using the simulated process for diagnosing radiation defects in electronic equipment under space conditions.
Some features of computer network modelling in the OMNeT++ environment
Authors: Polukarov D Y , Bogdan A P 
Published: November 2019

Abstract
There are many currently available tools for computer network simulation. However, all of these are intended for use by network engineers and are not designed for research tasks. Such simulation models have insufficient flexibility and degree of parameter variability to be used for research purposes. Here, it is proposed to create a simulation model for modern computer networks which allows for the research experimentation. It is proposed to use one of the open packages available which facilitate computer network simulation modelling (for example, OMNeT++) as a base platform. Open-architecture packages allow the researcher to create specialized simulation models. With the help of models created specifically for the needs of research, it will be possible to conduct properly rigorous experiments. This paper utilizes one of the existent implementations of the Barabashi-Albert model for generating computer network topologies. This simulation model can be run and tested within the OMNeT++ discrete event simulator.
Acceleration of calculations using block algorithms for the difference solution of the heat equation
Authors: Golovashkin D L , Yablokova L V , Reznik I D 
Published: November 2019

Abstract
In this paper, we propose taking into account the architectural features of the processor at the stage of constructing the numerical method itself. This idea is illustrated by the example of the synthesis of a new difference scheme for the heat conduction equation, which has traditionally been the object of testing innovations in the theory of difference schemes. The architectural feature hierarchical structure of the computer memory chosen led to considerable communication costs even when a single hardware computational flow was used for organising the calculations. This feature is accounted for in computational linear algebra by using block algorithms, and in the theory of difference schemes, by using the technique of programming ‘tiling’. However, for the two-layer difference schemes of block algorithms for solving grid equations, prior to the proposed work, it was not known because of the impossibility of organising block calculations by using the existing schemes. Here, we propose a new method of constructing two-layer difference schemes and a mixed scheme with a shift as an example of the application of this method. In the course of the experiments, a five-fold acceleration of calculations according to this scheme was demonstrated relative to the traditional explicit model, with the same computational complexity.
Solution of overdetermined systems of equations using the conforming subsystem selection
Authors: Fursov V A , Kotov A P , Goshin Ye V 
Published: November 2019

Abstract
Within this research, we consider an overdetermined system of equations generated on a small number of observations. The degrees of freedom of the overdetermined system and the number of observations are roughly equal. We propose a modification of the Conformed Estimates Method (CEM). The method improvement consists of the usage of an auxiliary system, which is formed from the initial system by reducing the columns. The estimates can be obtained on the higher-level auxiliary subsystem, which is the freest from noise. We consider our method in the problem of computing Rational Polynomial Coefficients (RPCs) from well-established Ground Control Points (GCPs).
Information model and software architecture for the implementation of the digital twin of the turbine rotor
Authors: Bolotov M A , Pechenin V A , Ruzanov N V , Grachev I A 
Published: November 2019

Abstract
The manufacturing errors of the turbine rotor lead to the occurrence of vibrations that limit the acceptable modes of operation of aircraft engines. In order to reduce such vibrations, the current manufacturing technology of the rotor contains a complex procedure for balancing it. Creating a digital twin of the turbine rotor will allow to abandon the balancing procedure and reduce the cost of manufacturing parts. This paper presents such stages of creating a digital twin as the determination of typical errors in the manufacture of a turbine rotor, the construction of a digital twin of a part taking into account the errors in manufacture and the determination of its key characteristics. Analysis of the properties of the twin allows to optimize its parameters and to reduce vibration of the entire engine.
Real-time fatigue features detection
Authors: Gaidar A I , Yakimov P Y 
Published: November 2019

Abstract
Fatigue detection is a very important goal because often tired people lose control of a certain task. So the driver falls asleep during a long trip. Driver’s state is very important because one of the main reasons for motor vehicular accidents is related to driver’s fatigue. To prevent accidents a driver fatigue monitoring and control system that works in real time is required. The main purpose of this study to build a base for developing the drowsiness control system. The article presents drowsiness features study, such as the closed eye, the yawn are required for building the system.
Intelligent OFDM telecommunication system. Part 1. Model of complex and quaternion systems
Authors: Labunets V G , Ostheimer E 
Published: November 2019

Abstract
In this paper, we aim to investigate the superiority and practicability of many-parameter transforms (MPTs) from the physical layer security (PHY-LS) perspective. We propose novel Intelligent OFDM-telecommunication systems based on complex and quaternion MPTs. The new systems use inverse MPT (IMPT) for modulation at the transmitter and MPT for demodulation at the receiver. The purpose of employing the MPT is to improve: 1) the PHY-LS of wireless transmissions against to the wide-band anti-jamming and anti-eavesdropping communication; 2) the bit error rate (BER) performance with respect to the conventional OFDM-TCS; 3) the peak to average power ratio (PAPR). Each MPT depends on finite set of independent parameters (angles). When parameters are changed, many-parametric transform is also changed taking form of a set known (and unknown) orthogonal (or unitary) transforms. For this reason, the concrete values of parameters are specific “key” for entry into OFDM-TCS. Vector of parameters belong to multi-dimension torus space. Scanning of this space for find out the “key” (the concrete values of parameters) is hard problem. MPT has the form of the product of the Jacobi rotation matrixes and it describes a fast algorithm for MPT. The main advantage of using MPT in OFDM TCS is that it is a very flexible anti-eavesdropping and anti-jamming Intelligent OFDM TCS. To the best of our knowledge, this is the first work that utilizes the MPT theory to facilitate the PHY-LS through parameterization of unitary transforms.
Intelligent OFDM telecommunication system. Part 4. Anti-eavesdropping and anti-jamming properties of the system, based on many-parameter and fractional Fourier transforms
Authors: Labunets V G , Martyugin S A , Chasovskikh V P , Smetanin J G , Ostheimer E V 
Published: November 2019

Abstract
In this paper, we aim to investigate the superiority and practicability of many-parameter Fourier transforms (MPFT) from the physical layer security (PHY-LS) perspective. We propose novel Intelligent OFDM-telecommunication system (Intelligent-OFDM-TCS), based on MPFT. New system uses inverse MPFT for modulation at the transmitter and direct MPFT for demodulation at the receiver. The purpose of employing the MPFTs is to improve the PHY-LS of wireless transmissions against to the wide-band anti-jamming communication. Each MPFT depends on finite set of independent parameters (angles), which could be changed independently one from another. When parameters are changed, multi-parametric transform is also changed taking form of a set known (and unknown) orthogonal (or unitary) transforms. We implement the following performances as bit error rate (BER), symbol error rate (SER), the Shannon-Wyner secrecy capacity (SWSC) for novel Intelligent-MPWT-OFDM-TCS. Previous research has shown that the conventional OFDM TCS based on discrete Fourier transform (DFT) has unsatisfactory characteristics in BER, SWSC and in anti-eavesdropping communications. We study Intelligent-MPWT-OFDM-TCS to find out optimal values of angle parameters of MPFT optimized BER, SWSC, anti-eavesdropping effects. Simulation results show that the proposed Intelligent OFDM-TCS have better performances than the conventional OFDM system based on DFT against eavesdropping.
Stochastic parallel algorithm of structural evolution of large Morse clusters
Authors: Kovartsev A N , Popova-Kovartseva D A 
Published: November 2019

Abstract
The formation of large Morse atomic clusters is a complex and time-consuming task, especially when the cluster stiffness equals 14. Currently, optimal cluster conformations are known for sizes up to 240 atoms. The article proposes a parallel stochastic algorithm for the structural evolution of Morse clusters, which makes it possible to find the optimal conformations of large atomic clusters. A significant number of problems associated with the complexity of the task are resolved using the proposed algorithm for optimizing the cluster structure. The results of optimization of Morse clusters for N> 240 are given.
The problem of neural networks communication
Authors: Leontev M Iu , Islenteva V Iu , Mikheev A V , Sviatov K V , Sukhov S V 
Published: November 2019

Abstract
In spite of the successful application of artificial neural networks (ANNs) for the solution of multiple problems (forecasting, language translation, image classification, voice recognition etc.), ANNs are still autonomous entities incapable of communication or exchange of their knowledge. Meanwhile, the ability to communicate is critical for further development of methods of artificial intelligence. We propose and test several methods of communication and knowledge fusion of ANNs. These methods do not require the presence of the initial training data and use only the internal parameters of ANNs. We propose generative iterative and non-iterative methods of ANNs communication. Noniterative methods show the classification accuracy similar to that provided by an ensemble of ANNs. The accuracy of generative methods is similar to a network trained on the joint dataset.
Study of lattice systems separability with the use of parametric identification methods for three-dimensional crystal lattices
Authors: Kirsh D V 
Published: November 2019

Abstract
The paper deals with the problem of lattice systems overlapping, arising in structural identification of crystal lattices in three-dimensional space. The problem leads to a crucial decrease in the accuracy of structural identification and is most evident for four types of lattice systems: orthorhombic, trigonal, tetragonal and cubic. The search for separation boundaries of these systems is based on the use of three parametric identification methods (Bravais unit cell parameters, Wigner-Seitz cell volumes and distances between isosurfaces) and evaluation of several similarity measures for the estimated parameters. Computational experiments were carried out on a large set of simulated reference lattices, by which the type of the distorted lattice was identified. Research results confirmed the existence of the problem of separability for the specified lattice systems, even in the case of ideal lattices (without any distortion). However, the main result was the determination of the parameters distortion range (5% for the edges and 3% for the angles), within which the lattice type is identified correctly.
Blur-robust image registration and stitching
Authors: Donon Y , Paringer R , Kupriyanov A , Goshin Y 
Published: November 2019

Abstract
This paper addresses the functioning of a new key point detection method for images. Such methods are useful in applications as image reconstructions, object signature recognition or video stabilization. The method, Blurred Image Matching (BIM), is based on the comparison of large areas of interest in images. BIM uses a process of blurring and shape comparison that makes the approach unique and in the vast majority of tested cases results in higher performances than other approaches. Among BIM’s key features are the amount of points used for comparison, 19 to 129 times fewer than other methods and of higher quality, allowing faster processing. Another of its key features is a high efficiency in the comparison of images, with a success rate higher than the average of existing methods by 13% to 36%, depending on the images’ characteristics. The method is still in a development stage and will significantly improve, however the results obtained so far are extremely promising, its task solving approach is new and makes a new range of applications necessiting key point detection possible. All this allows us to foresee BIM as a future standard among such methods.
65-year anniversary of Jakov Ye Takhtarov
Authors: Sokolov V O 
Published: November 2019

Abstract
The author briefly tells about the creative activities of the commissioning editor of the journal “Computer Optics”, the leading designer of the Image Processing Systems Institute of Russian Academy of Sciences (IPSI RAS) Jakov Ye. Takhtarov - known specialist in scientific publishing. The article analyses the contribution of jubilee in the formation of the image of scientific and educational institutions of Samara and design of scientific results of the IPSI RAS.
Numerically thermal analysis of a turbine vane at high temperature
Authors: Prapamonthon P , Yooyen S , Sleesongsom S 
Published: November 2019

Abstract
Using conjugate heat transfer, thermal analysis of a turbine vane coated with thermal barrier coating (TBC) at a high temperature is presented. Numerical results are carried out at two turbine inlet temperatures (T
∞) i.e. 783 K (low) and 1566 K (high) under two turbulence intensities (Tus) i.e. 8.3% and 16.6%. The main findings of this research are that for both Tus, the metal surface temperature reduction at the high temperature is higher than that at the low temperature because of the lower heat-flux ratio at the higher temperature. Based on the metal temperature reduction, the increasing inlet temperature has a greater influence than the increasing turbulence intensity. The results also indicate that at T
∞ = 783 K, on the pressure side (PS) the metal surface temperature reduction at Tu = 8.3% is lower than that at Tu = 16.6%, while on the suction side (SS) no significant difference happens when Tu increases. Interestingly, an inverse phenomenon happens for both PS and SS, that is the metal surface temperature reduction at Tu = 8.3% increases above that at Tu = 16.6% when T
∞ increases. This discrepancy may suggest the instability of the surface heat-flux ratio due to complex heat convection at the different inlet temperatures.
Modeling Ice Melting with Selective Absorption of Radiation
Authors: Sleptsov S D , Savvinova N A , Grishin M A 
Published: November 2019

Abstract
Numerical simulation of the melting of an ice layer on a vertical substrate heated by long-wave radiation in a single-phase formulation of the Stefan problem is carried out. A simple model for taking into consider a thin film of water on the irradiated surface is proposed. Ice is presented as selectively absorbing material with two absorption bands. Calculations shows satisfactory agreement with the experiment.
Analysis of power and energy management system for new energy dining car
Authors: Guo Yun , Ouyang Yeyu , Gao Yufei , Wei Bingde 
Published: November 2019

Abstract
Mobile dining car is very popular in Europe and USA because of its advantages of convenient and fast. However, most of dining cars still use traditional power and energy systems, which is not good for the environment. In recent years, the mobile dining car is developing towards light, convenient, and multi-functional. In large and medium-sized cities where business is concentrated, it is worth studying how to make the dining car cleaner and lower carbon, and make it a kind of green and healthy diet culture. In this paper, the green energy is introduced into the dining car power system and cooperated with the flywheel to realize the effective use of photovoltaic cells, achieve zero emission of the dining car, and put an end to the environmental pollution from the source. The social value and the actual effect will be great. Based on the analysis of the actual operating conditions of the dining car, the key parameters such as electrical equipment and motor load of the dining car are obtained, and then the matching calculation of the power system of the new energy dining car is carried out, including the power generation of photovoltaic cells and the storage capacity of flywheel batteries. Then, according to the unique working mode of the dining car, the energy distribution strategy and control system are analysed. Finally, a mathematical model is established and simulated with MATLAB to verify the effectiveness of the design. The results show that the system can complete the day work of the dining car.