
Accepted papers
Using the finiteelement metod for visualization of the stressstrain state of fish
Y.P. Tolmacheva , A.V. Chmatkova, S.A. Zaides
Accepted: 20190301
Abstract
The development of virtual methods of reconstruction and functional modeling of anatomical structures has opened new opportunities for evolutionary and ontogenetic studies on the relationship of form and function. One of the main is the analysis of the mechanical properties of bone tissue, in particular, its stressstrain state and variability of shape under the influence of external forces. To study the issues of adaptive transformation of the jaw apparatus of fish, in this paper we have proposed one of the modern mathematical methods for calculating the stressstrain state of the object using the finite element method. Based on the data of the computer tomograph Gendex GXCB500 with the help of engineering design system Femap V 10, a 3D finite element model of the maxillary bone of the visceral skeleton of bony fish with a retractable type of oral apparatus was developed and analyzed. It is established that the maximum tension in the functioning of the jaw apparatus falls on the ascending processes of the premaxillary bone, which in turn is the cause of the reduction of the mouth extension in the plankto and ichthyophages. With the elongation of the jaws of the plankto and ichthyophages, the pressure on the ascending processes increases significantly, which causes their gradual reduction. Thus, the variability of bone shape, first of all, occurs in places of greatest stress, arising during the functioning of the jaw apparatus.
Evaluation of the dependency between the composer’s international concert tours and the development of cultural relations using scientific visualization and machine learning
Z.N. Kniaz, S.Yu. Danilov
Accepted: 20190301
Abstract
The conception of the “culture dialog” is crucial for a perception of foreign culture and creation of analytic models of the mutual influence of music schools of different countries. Operas reflect historical processes that occur in the social, political and cultural life of a country. Traditional approaches to research in the field of creative development and mutual influences of compositors in different countries include systematization and generation of catalogs and chronographs that include information about different aspects of compositor’s creative activity. Most of such information is available as descriptions, chronological lists and data tables. Such data representation is not suitable for the holistic perception of the “culture dialog” phenomenon. This paper is focused on the different methods for the visualization of music history data based on scientific visualization and machine learning. The proposed methods improve the perception of a holistic perspective on the “culture dialog” phenomenon and can help to find hidden dependencies and trends.
Shadow scheme with selective range of photoregistration in aerodynamic tests
S.I. Gerasimov, V.A. Kikeev, V.A. Kuzmin, K.V. Totyshev, A.P. Fomkin, R.V. Gerasimova
Accepted: 20190222
Abstract
The classical straightcut registration scheme has a high resolution and the absence of distortions associated with the use of optics. The principal drawback that does not allow the use of this scheme in the field – susceptibility to background radiation accompanying the experiment. Number of recorded processes are characterized by relatively small size of the objects being thrown, for example, in the problem of modeling the impact of space "debris" with given screens or in the problem of modeling the emergency expansion of fragments of the active material. Resolution of xrays is insufficient to render such particles, and their hypersonic speed and the corresponding ionization of the air result in the exposure of photographic film in an open straightcut scheme. Additional background highlights in such experiments are the emission of muzzle exhaust in the case of use for dispersal of ballistic barrel systems or the glow of the explosion products in the case of detonation accelerating devices. Meanwhile, opportunities of straightcut scheme can be expanded by spending experience in the twilight time of the day and protected from background radiation, for example, by raccord as a filter of large area. The paper describes a shadow scheme of photo registration, which includes a point light source and a wideformat film with a protective filter. The result of application of this scheme in aerodynamic tests accompanied by intense background illumination is presented.
Use of methods of visual analytics to obtain integrated indicator of the quality of biometric authentication using the mechanism gesture manipulation
Yu.E. Kozlov
Accepted: 20190222
Abstract
Employing multimodal authentication techniques in the mobile applications which use several interconnected parameters in their operation demands studying them from the point of view of reliability. One of widespread ways of defining characteristics of such techniques is defining types I and II errors, and receiving a integrated quality indicator which can be defined upon visualizing type I errors (FRR) and type II errors (FAR).
Joint construction of dependency charts of FRR and FAR on the threshold value is possible only when using computer modeling and tools of visual analytics allowing to be convinced of correctness of the drawn conclusions visually. Traditionally for biometric authentication systems having probability indicators of reliability, the parameter which characterizes the integrated quality indicator is the equal error rate (EER) which is at the intersection of FRR and FAR curves.
The given article offers the research which has allowed to compare visually efficiency of a number of algorithms when carrying out the authentication procedure and to define the most favorable ones for biometric authentication in mobile applications by means of the inair signature mechanism in the context of reliability.
Visualization of highvoltage insulators defects on infrared images using computer vision methods
A.D. Zaripova, D.K. Zaripov, A.E. Usachev
Accepted: 20190222
Abstract
Image processing by using computer vision methods to extract information based on images is a very important task these days and finds its application in various applied fields. Systems for online monitoring of the equipment used in electrical substations and their condition are based on computer vision techniques that automatically detect and assess equipment defects.
This article describes the results of visualization of the main methods of computer vision for detecting insulator defects on the basis of an experiment with samples of infrared images of insulators. The results of a comparative analysis related to the methods of segmentation of infrared images can be considered as a basis for developing a program for an automated thermal imaging system for possible online monitoring of an electrical substation in real time.
New solutions for visualization of biomedical signals in telemedicine systems
Y.G. Gorshkov
Accepted: 20190222
Abstract
This article proposes new solutions for visualization of biomedical signals in development and operation of cardiodiagnostics telemedicine systems. Visual evaluation of bioparameters is based on multilevel wavelet analysis of recorded patient’s acoustic signals describing current state of the cardiovascular system, respiratory system and speech system. Proposed visualization solutions are implemented in form of ACUSTOCARD and ACUSTOMED telemedicine systems. Developed ACUSTOCARD telemedicine system being a set of software and hardware tools helps to find any cardiovascular diseases at earlier stages. ACUSTOMED is a further step of ACUSTOCARD telemedicine system, which additionally allows receiving acoustic sonograms of breath sounds and wavelet sonograms of speech signals to evaluate the level of patient’s emotional tension.
Scope of application of ACUSTOMED telemedicine system includes as follows: instant diagnostics of the cardiovascular system; operational monitoring of the heart state for patients after the cardiac surgery; pediatric cardiology; sports medicine; home telemedicine.
Experimental testing of biomedical signal visualization technology in cardiodiagnostics telemedicine systems confirms its high efficiency.
Plinius: A Visualization System of Costa Rica's Tectonic Plates
F. HernándezCastro , J. MongeFallas
Accepted: 20190210
Abstract
The Volcanological and Seismological Observatory of Costa Rica (OVSICORI) has been recording and archiving seismic activity data in Costa Rica since 1984.
We have designed and implemented a visualization tool, Plinius, to analyze the 3D location of 119 206 archived earthquakes occurring from 19842016, providing views from every desired angle and other specific needs of this scientific domain.
Using Plinius, OVSICORI seismologists can visualize the convergence of different tectonic plates in Costa Rica, detect new seismic activity, and facilitate necessary data management regarding the country’s geography. Most of the existing tools for this kind of task are 2D and do not have essential data filters for the domain; by contrast, Plinius enables scientists to analyze all the data in a 3D environment and to filter it in many different ways to derive better conclusions. This article describes Plinius and its potential.
SVMRBF Parameters Testing Optimization Using Cross Validation and Grid Search to Improve Multiclass Classification
F. Budiman
Accepted: 20190208
Abstract
The accuracy of using optimal parameter values in kernel functions is as a determinant to obtain maximum accuracy results on Image retrieval with Support Vector Machine (SVM) classification. Experiments conducted in this study aimed to obtain optimal Gaussian / Radial Basis Function (RBF) kernel function parameter values on non–linear multi class Support Vector Machine (SVM) method. Cross Validation and Grid Search methods were applied in analyzing and testing the optimization range of SVMRBF kernel parameter values to recognize the image of Indonesian traditional Batik which has geometric decorative patterns. In addition, a feature dataset of Batik images from the results of Discrete Wavelet Transform (DWT) level 3 db2 was used in this study. The feature dataset was used as training and test dataset. By using Cross validation and Grid Search, it resulted in the range value of parameter C = {2^{6.5}, 2^{6.75}, 2^{7}, 2^{7.25}, 2^{7.5}, 2^{7.75}, 2^{8}} and γ ={2^{14.5}, 2^{14.75}, 2^{15}, 2^{15.25}, 2^{15.5}, 2^{15.75}, 2^{16}}, and the accuracy value of maximum classification for parameter C = 2^{7} and γ=2^{15}. These range results of parameter values and optimal parameter values can be used as a reference in applying parameters on image recognition with geometric decorative motif texture using SVMRBF kernel classification.
Data abstraction models: sampling (parallel coordinates), filtering, clustering
D.V. Manakov
Accepted: 20190208
Abstract
When considering computer visualization as an independent discipline, it is necessary to build its mental space with its semantics, pragmatics and basis. Thus any two visualization specialists will be able to speak the same language. This basis is chosen from a sufficiently wide interdisciplinary field of knowledge. Verification of visualization in the spirit of fuzzy sets is defined in terms of the ratio of two basis functions of accuracy and completeness of visualization, it must ensure that the end user is offered a formally correct model of visualization or in other words that the developers of visualization systems have solved the task.
At the present stage of the development of computer visualization, the criterion of completeness is more important. First, it is necessary to form a mental space, and then, by clarifying the semantics, the pragmatics and the basis, replacing the mental space with a logical space, go to the verification of visualization. The construction of monotonically increasing basic functions, for example, the accuracy of visualization: statement of the problem, prototype, application, service, allows to view the classification as a continuous process. Possible statements of problems are considered as challenges and determine not only prospective directions of visualization development, but also their set produces a completeness function.
In the computer visualization sector of IMM UrB RAS, the possibility of developing online parallel computing services is considered. Based on the webvisualization constructor, one can implement standalone support for standard data abstraction models, in particular, filtering, clustering, and sampling. The main part of this paper contains an overview of these models. In order to identify common approaches, we develop a fuzzy verified classification that takes into account both the frequency of occurrence of models, structural units, informative features, and the mathematical level of data abstraction.
Since visualization becomes the environment of an automated analytical process, the directions related to selforganization, for example, dissipative systems, are of interest for visual analytics. From these positions, it is possible to clarify the notion of a structural unit of visual analysis, including data abstraction models. The structural units of the visual process include the visual paradigm, sensitivity analysis, refactoring, calibration, limited uncertainty, webvisualization. Building a logical space provides automatic verification. We propose considering the structural unit as a continuous mapping of the class of subsets of data to a logical space.
Building and Visualization of Sleek 3D Surfaces without Misplaced Extremes
K.V. Ryabinin, K.A. Matkin
Accepted: 20190208
Abstract
The paper is devoted to the visualization of functional dependencies expressed as y= f(x,z) by building sleek 3D surfaces based on discrete sets of points. The criteria of sleek surface quality are formulated taking into account the needs of scientific visualization and visual analytics. The most important criterion is the absence of misplaced extremes and oscillations on the result surface, because such artifacts can deliver false information about the process being represented by the visualized data. The methods of building smooth surfaces in the most popular scientific visualization software are examined against the formulated criteria and it is discovered that the misplaced extremes are an issue in modern visualization tools. To tackle this problem the new approach of building sleek surfaces is proposed. This approach is based on the previously developed algorithm of building smooth 2D curves that was generalized to the threedimensional case.
The developed surface building algorithm consists of the following main steps. Assuming to have the input data as a regular grid of 3D points, which correspond to the tabledefined function y= f(x,z), we first propose to build the set of smooth 2D curves along X and Z axes. Afterwards, we propose to build bicubically blended Coons patches for all quads bounded by each 4 neighbor points from the original data set. Then we discretize each Coons patch by emitting new points to reach needed surface resolution. Next, we triangulate the created set of points and calculate vertex normals using smoothing groups algorithm. Last, we smooth the field of normals using Gaussian blur function.
The proposed algorithm meets the formulated criteria and ensures high visual quality of result surfaces. It was integrated into multiplatform charting library NChart3D and scientific visualization system SciVi, where it proved its correctness and stability by solving realworld scientific visualization tasks.
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.
A Method for Topology Optimization Results Estimation Based on the Analysis of Raster Images of the Material Distribution
P.A. Alekhin, A.O. Glebov, S.V. Karpov, S.V. Karpushkin
Accepted: 20190114
Abstract
Topology optimization is widespread technique in modeling the stressstrain state, thermal conductivity, electromagnetism, etc. As a rule, tasks are solving with SIMP method using the finiteelement analysis. The efficiency of the SIMP method depends on the discretization of the computational domain into finite elements, the initial distribution of the material and the filtration procedures of the results obtained. In the previous papers about topology optimization the estimation of the calculated results is based only on the visual analysis of results material distribution. In this paper, we propose a method for estimation of results based on the analysis of raster images of the material distribution fields. The method involves calculation of ratio of pixels that characterize the presence of material and belong to the transition region by the total number of pixels of the calculation area. The method is universal, independent of the main calculation equations, and can be used for qualitative and quantitative comparison of the results of solving twodimensional problems of topology optimization.
The influence of density of the calculated finite element mesh on the quality of the results of topology optimization of stationary heat conduction of a flat metal plate investigated. The method of moving asymptotes was chosen as an optimization method. The duration of calculations was examined; the optimal density value of a mesh was found and justified.
Concept of a visualization method for earth’s gravity field on plain maps
M.A. Boyarchuk, I.G. Zhurkin, V.B. Nepoklonov
Accepted: 20190114
Abstract
Currently in the study of Earth’s physical fields vector field components are represented as separate scalar fields. Moreover, application of GIStechnologies within a framework of physical scalar fields' mapping has increased recently. Digital representation of those fields is based on either regular grids or TINnetworks. Based on the analysis of existing geophysical field representation methods, a new method of Earth physical vector fields’ visualization that allows for simultaneous visualization for all components of a three dimensional vector on a plane map is presented. Application of quaternions for representation and visualization of vector fields is a distinctive feature of this method, which allows for an effective way for coordinate system transformations, finding of a resultant field and interpolation. À ruleset for converting quaternions’ components into color system coordinates is described as well as an example of vector components restoration from color image. Also, an illustrating experiment is presented. Described visualization method can be used in GIS for more complete and detailed representation of Earth’s physical fields. Moreover, quaternion representation may find its uses in navigation. The research was supported by Russian Foundation for Basic Research (RFBR, grant 160500720).
Simulation and visualization of the flow around blunted body in the wake of supersonic ejecting pellet
Ya.V. Khankhasaeva, A.L. Afendikov, A.E. Lutsky, I.S. Menshov, V.S. Nikitin
Accepted: 20181125
Abstract
The visual and physical features of the flow forming around spherically blunted cylinder during pellet (millimetersized solid body) injection towards the flow with supersonic speed are considered. The structure of this time dependent flow is very complicated and new ideas are used in the study.
Numerical simulation of moving bodies is made by the free boundary method (version of immersed boundary method) on multilevel Cartesian grids with local adaptation based on the wavelet analysis.
Dynamics of a moving body interaction with the bow shock, formation of the reverse flow region between bodies, its deformation and disappearance, and subsequent establishment of a stationary flow are studied. Reduction of main body drag to the level of 20% of the original is obtained.
In this process, several specific stages can be found. When the front part of the pellet is in the subsonic flow behind the front bow shock wave it has little effect on the outside flow. Then pellet interacts with the bow shock wave and deforms it. Recirculation zone forms between bodies. It grows to a certain size, after which, because of the pellet wake intensity lessening due to the pellet's increasing distance from the main body, it begins to decrease and is eventually blown away from the front part of the main body. Stationary flow close to the initial one (i.e., before pellet injection) is established around the main body.
Flow dynamics are illustrated by a series of images and animations which show the distribution of density and pressure, stream lines and mesh structure.
Technology optimization in the question of assessing the quality of learning tests
E.A. Volkova, M.V. Maschenko
Accepted: 20181117
Abstract
This article describes the results of the work in the area of visualization of quality assessment of training tests. The detailed description of the algorithm of operation, interface and components of the automated system that visualizes the structure and pedagogical characteristics of the training test is given.
The presented system is based on the technology of multiparameter assessment, which is currently one of the most effective methods of identifying the final judgment about the feasibility of using the test material in the educational process.
The result was a software application in the programming language Delphi, which creates a collection of highquality educational tests with the output of the visual component, which reflects all the properties and educational capabilities of the test material.
Experimental testing of visualization technology in assessing the quality of training tests in their design, as well as in trial use confirmed its high efficiency.
Visualization software for Hydrophobicpolar protein folding model
R. Mavrevski, M. Traykov
Accepted: 20181115
Abstract
The simplest and most used models of protein folding is the HydrophobicPolar (HP) model. The HP model labeling the amino acids as Hydrophilic (H) or Polar/ydrophilic (P). The folding of amino acids sequence is configured as selfavoiding walks on the 2D or 3D lattice, where the optimal conformation has maximum number of contacts between H amino acids (HH contacts) that are not adjustment in amino acid sequence. In this paper, we develop and present software for visualization of HP protein folding problem under the HP model on the 2D square lattice. For the development of HP folding visualization software, we used MS Visual Studio, .NET Framework 2.0 and C# language. If we have HP sequence and folding results for this sequence, obtained by optimization software as CPLEX or GUROBI, then using the 2D visualization software we can visualize the obtained results in square lattice. This visualization software is a valuable tool for the study of HP folding and is a great pedagogic instrument. All figures of HP folding included in this paper are actual screenshots of our visualization program.
Application of Business Intelligence instrumental tools for visualization of key performance indicators of an enterprise in telecommunications
V.D. Kolychev, À.À. Shebotinov
Accepted: 20181108
Abstract
The article represents the experience of practical application of visual analytics tools that allow to make deliberated and reasonable managerial decisions based on the visualization of large volume of information using Business Intelligence tools. The key feature of the proposed approach is the development of visual models of key performance indicators (KPI) at the strategic level of management of the enterprise. The developed models are considered as a tool for justification of managerial decisions, building business models of hightech companies, measuring the efficiency of functioning and evaluating the effectiveness of the development of the selected activities. The Business Intelligence tool was used to build a number of visual models for a hightech enterprise in telecommunications. The novelty of the proposed approach lies in the application of intensively implemented in both Russian and Western companies performance management and management decision making technologies which are aimed at improving competitiveness, import substitution, cost reduction and optimization of business processes. The requirements of a dynamically changing environment, shortening the products' life cycles, global competition with the necessity lead to create specialized visual situational business models built on the basis of powerful automated systems of business planning and graphics, data analysis and processing of information arrays.
Estimation of the Meridional Heat and Mass Transport in the South Atlantic by Using the Joint Atmosphere and Ocean Circulation Model with Data Assimilation and Visualization Facilities
K.P. Belyaev, A.A. Kuleshov, N.P. Tuchkova
Accepted: 20181019
Abstract
The joint oceanEarthatmosphere model of the Max Planck Institute for Meteorology with application of original data assimilation methods are used to estimate the meridional heat and mass flows. The CTDsections of temperature and salinity across the Atlantic Ocean for 1991—1995 obtained in the course of the WOCE (The World Ocean Circulation Experiment) international experiment are used as observation data. The sections contain about 650 stations; each of them provides from 100 to 3000 measurements from the sea surface to the bottom. In our study both the control estimates for the velocities of currents and those with assimilation of the data of these experiments are obtained. Using visualization facilities, we have shown how data assimilation changes the model characteristics, including velocities of currents and temperature fields at different sea levels. The graphs demonstrate the influence of the change in the initial field after data assimilation on the results of the model calculations after 6 and 11 months of integration for both the observed model characteristics and those which are not observed directly. The Generalized Kalman Filter (GKF) method which coincides in a particular case with the classical Ensemble Kalman Filter (EnKF) is used as the data assimilation method. The results of calculations of the heat and mass flows are analyzed and compared with those of control calculations with no data assimilation. The calculations were performed on the supercomputers “Mistral” in DKRZ (Deutsches Klimarechenzentrum, Hamburg, Germany) and “Lomonosov2” in the Lomonosov Moscow State University.
This work was supported by the Russian Science Foundation, project no. 141100434.
A method for visualizing the drawing of a nonplanar graph
S.V. Kurapov, M.V. Davidovsky, A.V. Tolok
Accepted: 20180725
Abstract
In this paper, we consider the issues related to the representation of a nonplanar graph drawing. We propose a new method for constructing a topological drawing of the flat part of a nonplanar graph. The initial information used for the solution is basically the set of graph isometric cycles, which makes it possible to reduce the solution to discrete optimization methods. The necessary concepts and structures for solving the problem of constructing a nonplanar topological graph drawing are considered.
Construction of linear structure of a skeleton for the closed path of complex geometry on the basis of the method of functional voxel modeling
A.B. Tolok, M.A. Loktev, N.B. Tolok, N.D. Zhilina, M.B. Lagunova
Accepted: 20180420
Abstract
In this paper the way of construction of straight skeleton for complex closed contours described by means of a mathematical apparatus of Rfunctions is proposed. Applied asystem for the Rfunctional of description of the circuit and shown the results of the function at various values of the ratio a. Shows the transition from the organization of separate extreme points of Rfunctional surfaces to the organization of the linear structure of the skeleton of the zero contour. Here we describe the principle of Mimages constructing on the basis of the method of functional voxel modeling (FVM). FVMmethod, is the organizing principle of symbolicgraphic information, combining the analytic form of the description of a multidimensional model with a voxel representation of its local geometric characteristics. Selected class of Mimages allows to automate the definition of the points and lines making a skeleton structure on the basis of delimitation of color transition. Such approach is based on preliminary representation of graphic information as a functional voxel model and allows to considerably simplify the computational process of search for solutions. Also we make the comparative analysis of a classical way of construction of straight skeleton with the offered computer graphic approach.


