
Accepted papers
Visual cognitive control of space systems radiotechnical signals
Yu.G. Emelyanova, M.V. Khachumov
Accepted: 20200212
Abstract
The method of cognitive graphical information presentation is developed, allowing to classify radiotechnical signals and estimate the degree of noise. The method is based on the construction of a features set ordered by information significance. In turn, informativeness is determined by the formal contribution of the feature to the quality of signal type recognition. The construction of cognitive images is carried out in several stages: 1) determination of numerical characteristics of typical signals, 2) ranking and selection of the most informative characteristics, 3) construction of cognitive graphic images visualizing a multidimensional vector of signal features, 4) operator's interpretation of cognitive images.
The method of integral contour representation polar scan is used to construct cognitivegraphic images of signals. A total of forty informative parameters of the signal (features) are calculated. To increase the polar scan selectivity, the features are ranked in informativeness descending order by the Add and Del ìethods. The operation of signals subtraction defined over their informative parameters is introduced. With the goal to improve the visual recognition quality, monochrome halftones have been added to cognitive images. To perception improve of the contour representation of difference images introduced color components. The sensitivity of the cognitive images of substantial noise signals expressed in changing polar scan forms, tones and colorful presentation. The comparison of signals recognition quality by using metrics and polar scan visual recognition is provided. The recommendations are given to the decisionmaker operator on the type and noise degree of the radio signal in the final part.
Scientific publications bibliometric networks visualization on the human factor study in the nuclear power plants operation based on the bibliographic database Dimensions
A.Kh. Khakimova, O.V. Zolotarev, M.A. Berberova
Accepted: 20200212
Abstract
The need to take into account the human factor in the operation of nuclear power plants is justified by the fact that erroneous actions of personnel and operators of nuclear power plants can directly or indirectly lead to accidents. Therefore, the personnel reliability analysis allows you to identify the most likely erroneous NPP personnel actions and develop a measures to reduce them set. This paper discusses the visualization issues scientific publications bibliometric networks for the human factor in the operation of nuclear power plants study.
Shape visualization of magnetic anisotropy energy density of singledomain nanoparticles
R.A Rytov, N.A. Usov
Accepted: 20200131
Abstract
The key physical parameter determining the stationary directions of the magnetic moment of a singledomain ferromagnetic nanoparticle is the type of its effective magnetic anisotropy. The stationary directions of the magnetic moment of a particle change under the influence of an external magnetic field. For better understanding of a behavior of the magnetic moment of a nanoparticle in an external magnetic field, we proposed a simple method for visualization of the energy density of magnetic anisotropy of a singledomain magnetic nanoparticle has been developed. In a spherical coordinate system, the energy density of magnetic anisotropy is represented as a certain surface, which makes it possible to clearly demonstrate the presence of energy minima that determine the equilibrium directions of a single vector of magnetization of a nanoparticle in space. The cases of uniaxial, cubic, and combined magnetic anisotropy are considered in detail. The change in the total energy of a magnetic nanoparticle under the influence of an external uniform magnetic field is demonstrated.
Hierarchical Hidden Markov Models in Image Segmentation
M. Ameur, C. Daoui, N. Idrissi
Accepted: 20200131
Abstract
Hidden Markov Models have been extensively used in various fields, especially in speech recognition, biology, image and signal processing and digital communication. They are well known by their effectivenss in modeling the correlations between adjacent symbols, domains or events, but they often suffer from high dimensionality problems. In this work, we propose two approaches to reduce the execution time of Hidden Markov Chain with Independent Noise used in image segmentation. The ﬁrst one consists of dividing the image into blocks, each of them is treated independently of other. In the second approach, we have divided the observations into blocks, but the treatment of each block depends on its previous one. The obtained results, show that our approaches outperform standard one, and contribute efﬁciently to reduce the execution time and the number of iterations ensuring the convergence.
VISUALIZATION OF TORNADOLIKE STRUCTURES FOR THE PURPOSE OF IMPROVEMENT OF COOLIND SYSTEMS OF ELECTRICAL DEVICES
A.Yu. Varaksin, K.K. Denshchikov, M.V. Protasov, M.E. Romash
Accepted: 20200130
Abstract
The work is devoted to solving the problems of cooling of electrical devices and systems of kilovolt and megawatt ranges. Unsteady vortices can form in the flow around structural elements and components of electrical devices. Visualization and diagnostics of vortex structures arising during the movement of coolants through channels of complex geometry are urgent tasks.
Tornadolike structures (nonstationary vortices) were generated over the underlying surface (aluminum sheet) due to the creation of unstable stratification of air when it was heated from below. To visualize the generated wallfree nonstationary vortex structures the micrometer magnesia particles were applied, which were deposited in a thin layer on the underlying surface before the experiments.
Framebyframe viewing of records obtained by direct video filming at various thermal conditions made it possible to conduct a qualitative analysis of the spacetime structure of unsteady vortices and obtain information on a number of their important integral parameters (visible height, diameter, lifetime, number of vortices, vortex funnel velocity, etc.).
The basics of processing of pictures obtained by the particle image velocimetry (PIV) using by the POLIS velocimeter (Institute of Thermophysics, SB RAS) to restore the instantaneous velocity fields of vortex structures have been considered.
The results of visualization of wallfree nonstationary vortices obtained by using of direct video filming and vector fields of instantaneous velocities in the cross section of the vortex obtained by using of PIV are presented.
The study of methods for analysis burning torch infrared images
I.A. Berg, S.V. Porshnev
Accepted: 20200130
Abstract
The paper describes the results of the study of methods for analysis burning torch infrared images obtained by an infrared camera in the band of electromagnetic wavelengths of 1.55.1 μm. It was shown that the known infrared image analysis methods cannot provide the quantitative parameters extraction that could describe combustion process. In addition, it was figured out that the known methods are timeconsuming and cannot run in real time. As a result, nowadays the combustion control system that uses optical control of torch parameters in infrared band cannot be designed.
In our study we analyzed the pixels quantity distribution density in the range of [520,560] relative Celsius degrees on each frame of the initial infrared sequence of burning torch. It was shown, that the pixels quantity distribution has the bimodal distribution law and can be described by three local extremes coordinates: two maximums and a minimum located between them. The pixels that have relative degrees values in the range from 520 degrees to the value of the minimum’s abscissa and from the value of the minimum’s abscissa to 560 degrees relatively form two separate zones on the burning torch visualization.
It was demonstrated that timedomain series constructed from framebyframe calculated local extremes coordinates of the P(T) distributions are stationary random sequences. This result allows to use these timedomain series as quantitative parameters of the torch combustion. It was shown that the local minimum’s abscissa value of the P(T) distribution with a relative error of 2.8 % is a constant value equal to 536.3 relative degrees. This allows to count the pixels quantity of each of the separate zones without using timeconsuming Rosenblatt – Parzen estimation and run data processing in real time.
Virtual training and research laboratory of technological processes of chemicaltechnological systems
V.A. Nemtinov, Y.V. Nemtinova, I.M. Manaenkov
Accepted: 20200129
Abstract
The article examines the issues related to development of methods for creating a virtual training and research laboratory for chemical and technological systems on the example of technological processes of batch production of organic dyes. The vAcademia programming environment is used as the base software environment for the laboratory prototype. Tools of various systems were used to create laboratory elements: two and threedimensional design systems: SketchUp, AutoCAD, COMPASS3D; graphic and video editors: Adobe Photoshop, The GIMP, Photoscape, Windows Movie Maker, SONY Vegas Pro; visual modeling tool for discrete dynamic systems SIMUL8; software for working with texts and tables Microsoft Office. The main purposes of the laboratory are to study the processes of chemical and technological systems, to model them using SIMUL8 modeling system, as well as to create a communicative educational environment that facilitates improving quality of education, exchange of opinions, mutual consultation and, thus, formation of network scientific communities.
3D Visualization of geological and construction data for mine shaft equipping using arcgis tools as an element of informationanalytical system “construction  geological environment”
P.A. Krasilnikov
Accepted: 20200121
Abstract
Emergency situations periodically arise at various complex engineering objects, which could have been avoided if there is complete and reliable information about the structure and the geological layer that is the base of the object or its environment. The author believes that for the technical services serving the structure, it is necessary to create and constantly update informational and analytical models of the “structuregeological environment” system, containing the technical characteristics of engineering structures and indicators characterizing the geological structure.
Such a model is analogous to BIMmodeling and will be able to provide technical services specialists with reliable and timely information at all stages of the construction life cycle. An essential element of this model is the threedimensional visualization of data, which allows for a new level to control the design decisions made and to make timely changes when errors are detected.
The paper proposes an approach to threedimensional data visualization of a technically complex engineering object (a shaft), located inside the geological environment, using ArcGis tools. The proposed approach is implemented on the example of the sinking of two shafts of the Verkhnekamskoye potassium and magnesium salts deposit. The main simulation results, visualized both in twodimensional and threedimensional form at specific points in time, are given. Using the ArcGis environment allows not only to carry out a spatial analysis of existing data, but also to prepare a presentation material in a dynamic form (animation).
Visualization of the process of neutronphysical calculation of a nuclear reactor
A.O. Bukalin, A.M. Zagrebaev, V.N. Samanchuk
Accepted: 20191216
Abstract
This article describes a computer program for visualization of the process of solving the diffusion equation by the source iteration method. This method is used in the overwhelming majority of software systems for calculation of VVER and RBMK reactors. This program allows you to demonstrate visually the process of obtaining the neutron field micro and macrostructure (macrofield) in the iterative solution of the equation. Visualization of the iterative process allowed us to establish the fact of the rapid appearance of the microstructure of the solution at the first iterations and the slow appearance of the macrofield of the neutron flux density. This fact made it possible to propose a new approach to solving the diffusion equation, namely, to extract the lowfrequency component in the initial data of macroscopic interaction cross sections using digital filtering methods, first to perform the calculation with filtered macroconstants on a coarse grid, and then finally to perform the calculation on a fine grid.
The studies have shown that even on a onedimensional model the calculation of reactor is accelerated several times, which means that when solving a threedimensional problem, the solution speed will increase by two orders of magnitude. This is important when solving optimization problems and «online» calculating emergency situations.
Visualization of the interconnection between dynamics of the system and its basic characteristics
G.V. Kreinin, S.Yu. Misyurin, A.P. Nelubin, N.Yu. Nosova
Accepted: 20191216
Abstract
The paper presents a dimensionless mathematical model of the dynamics of the drive complex and the visualization of the solution of this model, which allows to obtain comparative estimates (characteristics) of the solutions obtained in the first approximation.
The authors proposed an original control system for the drive complex of two hydraulic actuators to lift the load in parallel mode. A distinctive feature is the adopted control circuit of the complex through three hydraulic switchgears, which are responsible for regulating the overall lifting (and/or lowering) speed of the object and maintaining the horizontal position of the object within the specified accuracy in the presence of disturbing factors of different nature. The difference in displacements of the hydraulic actuator rods from some initial (basic) position at a given time is a sign of deviation of the object from the horizontal position. The mathematical model of the object obtained is investigated in dimensionless variables, which greatly simplifies the visual synthesis of the object.
Modeling the development of KelvinHelmholtz instability in problems of high energy density physics
N.V. Zmitrenko, P.A. Kuchugov, M.E. Ladonkina, V.F. Tishkin
Accepted: 20191201
Abstract
The results of mathematical modeling of the development of KelvinHelmholtz instability in the conditions of irradiation of flat targets using an OMEGA laser facility are presented in this work. he vortex growth rate is compared with available experimental data. Taking into account the simplifications made in the numerical formulation of the problem, the various data are in satisfactory agreement with each other. The visualization of the flow made it possible to fully analyze its structure, determine the sizes of the characteristic vortices, and also reveal the differences between the 3D and 2D variants associated with the relaxation of the flow in transverse directions.
Visualization of CAEsolutions of partial problems of ice navigation. Icebreaker sitting and propulsion ability
V.A. Lobanov
Accepted: 20191121
Abstract
The article is devoted to ice navigation with particular emphases on the operation of icebreaking that ensures efficiency and safety of ice transport services. The ice transport services are distinguished by a wide range of necessary operations, actions, maneuvers, the modes and dynamic working methods. It reserves a burning relevant a problem of assessment of ice performances in special operating conditions. In this work CAE modeling of the movement in continuous ices, ice cakes and small ice cakes of the multishaft shallowdraft icebreaker ship of the project 1191 is considered. The different combinations of its draft, a list and a trim are investigated. Qualitative features of influence based on the nature of interaction of the vessel with the ice environment are described. Comparative analysis of experimental data of ice loads on the hull and a propulsion, as well as the steering complex are made. Quantitative assessments of ship based on its total ice resistance are given.
Visualization of EEG signal entropy in schizophrenia
I.E. Kutepov, A. V. Krysko, V.V. Dobriyan, T.V. Yakovleva, E.Yu. Krylova, V.A. Krysko
Accepted: 20191022
Abstract
This paper describes the visualization of the study of signal entropy in two groups of subjects. Brain activity signals were obtained using electroencephalogram (EEG). Two groups of adolescents – a schizophrenic group and a control group – were the subjects of the study. For each of the participants in both groups, 16 channels were recorded. Multiscale entropy, model entropy, and approximated entropy were analyzed for signal complexity. The results of the entropic assessments were compared in the form of topographic images. Topographic images of the head surface were obtained based on a spherical spline. The activity of brain hemispheres for both groups was compared using the mean values of the crosscorrelation function.
The study showed that the visualization of EEG signals could be a useful tool for classification of patients with schizophrenia and control groups. The analysis may be considered useful for the psychiatric examination of patients with schizophrenia.
On the other hand, the proposed approach is useful to extend the functionality of the educative robotics. Identification of schizophrenic subjects in the group of students provided by the robotic complex on the fly helps to avoid possible antisocial behavior while applying adequate training methods.
Using Big Data Analysis Instruments to Tackle the Problem of Simulation Results Visualization in Large Scale Gas Dynamics
V.I. Reshetnikov, Å.À. Golubchikov, A.V. Pyatlin, A.K. Kuzin, V.A. Kiev, N.N. Shabrov, A.S. Zhuravlev, E.K. Guseva
Accepted: 20191009
Abstract
The article is dedicated to the development of the software for fast visualization of simulation results of gas dynamics problems on large meshes. Kitware ParaView, which is popular software among engineers and scientists, was selected as a graphical frontend. Within the framework of the project, an interaction between ParaView client and server is used. The key feature of the work is the usage of Apache Hadoop and Apache Spark systems for distributed loading of the data into ParaView. The results are stored on the cluster in Hadoop Distributed File System (HDFS) and are provided to ParaView server by means of data processing tool Apache Spark.
Algebraic methods for coloring cubic graphs
S.V. Kurapov, M.V. Davidovsky, A.V. Tolok
Accepted: 20191009
Abstract
This article considers algebraic methods for coloring cubic graphs based on the results of the Tate theorem. To formally describe the coloring of a cubic graph, the authors use a fourthorder Klein group transform. For the transition to the coloring of the graph, the edges of the basis cycles are respectively colored. Overall, the mathematical framework for describing topological graphs is described in the article. Based on the coloring of the edges, the formation of colored disks and the mathematical description of the operation of rotating colored disks with subsequent recoloring of the edges are considered. It is shown that the operation of rotating color disks can be presented as a ring sum (addition modulo 2) of cycles. For an unambiguous description of the representation of colored disks by means of basic cycles, the concept of embeddability of colored disks is introduced. In the article, the authors provide examples illustrating the application of the operation of colored disks rotation. The relation between the system of induced cycles generated by the rotation of graph vertices and the coloring of 2factors of the cubic graph is established. It is shown that the ring sum of all cycles included in the colored 2factors of the graph is an empty set. The article also addresses the issues of coloring nonplanar cubic graphs. The relationship between basic cycles and a rim in a nonplanar cubic graph and a ring sum of colored 2factors is shown in the article. The relationship between the color rotation of the vertices of a flat cubic graph and the closed Heawood paths is explicitly indicated in the article.
Visualization of quality of 3D tomographic images in construction of digital rock model
A.S. Kornilov, I.A. Reimers, I.V. Safonov, I.V. Yakimchuk
Accepted: 20191006
Abstract
Various types of tomography are widely employed in oil and gas industry for studying inner structure of rocks. Using Xray or FIBSEM tomography, a 3D model of a core sample is constructed for mathematical simulations of fluid flow in porous media and evaluation of physical characteristics of rock. Since images have various defects and distortions, there is a problem of selection of a fragment with the best quality from the initial 3D image. At the moment this operation is made manually on the basis of an expert’s personal opinion and takes significant time. In this paper, we investigate applicability of existing referenceless quality metrics for evaluation of tomographic images and propose the approach for visualization of spatial change of 3D image quality. The method includes the construction of central crosssection; plotting graphs of quality and similarity indices for each layer over the crosssection; generation of combined heat map of quality of cubic fragments with various size. The proposed approach significantly accelerates and makes less subjective selection of the best region for further simulations in digital rock workflow. The choice of colour scale is considered to facilitate the analysis of graphical information for people with colour vision deficiency.
The research of the stereoscopic characteristics of virtual reality helmets
A.I. Vinokur, N.V. Kondratiev, Yu.N. Ovechkis
Accepted: 20190727
Abstract
Individual stereoscopic virtual reality devices have become very popular all over the world. Their advantages in comparison with traditional means of presenting stereo images are to provide a large viewing angle, taking into account the location and movement of the observer, binding the image to the direction of his gaze. To obtain a highquality and comfortable visualization system, it is necessary to achieve a certain ratio of technical parameters. In this paper, we consider the limitations of the depth of a threedimensional image reproduced in helmets of virtual and augmented reality, due to the stereoscopic nature of its formation. Methods and results of the estimated calculations of the boundary distances for different conditions for the demonstration of threedimensional stereoscopic images are given. Experimental studies of the overall parameters of optical circuits of seven different types of virtual reality helmets have been carried out. It is shown that most of them, especially the most accessible as cheaper and often used in a social environment, are not suitable for demonstrating deep scenes of the surrounding visual environment. Recommendations for their modernization are given.
Spin Diode Based Microwave Registration and Holographic Visualization of Wave Front Scattering for an Autonomous Driving System
K.A. Zvezdin, D.R. Leshchiner, A.F. Popkov, P.N. Skirdkov, A.G. Buzdakov, G.N. Chepkov
Accepted: 20190607
Abstract
In the paper, we discuss the scheme and the prospects of holographic visualization of scattering objects using microwave registration based on spin diodes to identify obstacles to movement for the car’s autonomous driving system. With wavelength decrease, the resolution of the holographic system grows, but the recording capacity at a given level of irradiating signal and diode noise decreases. We give an algorithm for the numerical reconstruction and visualization of obstacles. Estimates for the resolution and the reliability of object identification, depending on the distance to the obstacle, obtained by numerical modeling. We show that there is an optimal wavelength achieving the maximum range of microwave recording, taking into account the system resolution and the acceptable signal level. Highly sensitive spin diodes, feasible for the 230 cm wavelength range, approach the optimum range, which is ~ 0.51 cm for Schottky diodes, in their holographic visualization ability. Based on the Kotelnikov theorem for the sampling frequency of a harmonic signal, and on numerical experiments, the requirements for the placement density of the receiving elements of the recorder antenna array were determined depending on the distance to the object, the number of sensors and the recording window size. We show that a microwaverecording device based on spin diodes can be promising for an autonomous driving system at conditions of constrained movement with poor visibility and high noise.
Generating a topological drawing of the flat part of a nonplanar graph
S.V. Kurapov, M.V. Davidovsky, A.V. Tolok
Accepted: 20190201
Abstract
In this paper, we consider the issues of the diakoptic approach to constructing a topological drawing of the flat part of a nonplanar graph. It is shown that the first stage of constructing a topological drawing is based on the matroid properties of the set of graph isometric cycles. The authors propose a method for constructing a topological drawing of the flat part of a nonplanar graph using the methods of structure numbers algebra. The initial information for the solution is based on the set of graph isometric cycles, which makes it possible to reduce the solution to discrete optimization methods. The second stage of joining the cycles is based on the methods of vector algebra of intersections. The necessary mathematical concepts and structures for solving the problem of constructing a flat topological drawing of a nonplanar graph are considered in the paper. The presentation of the stuff is confirmed by illustrative examples.


