bluuebunny/crossref_metadata_2025_split huggingface dataset:
Minimizing information security risks based on security threat modeling
Authors: Barankova I I , Mikhailova U V , Afanaseva M V 
Published: January 2020

Abstract
The well-elaborated models of information security threats (IST) allow for the optimal development of a protection plan. This plan will be based on current threats and will consider effective countermeasures that increase the level of information security (IS). The threat model is described using different automation methodologies of this process. It is also possible to visualize the structure of complex objects and processes them from the required angle and with sufficient granularity. Constructing various threat implementations as trees or attack graphs (AG) is one of the relevant directions in assessing the level of IS. The creation of a software application for automation and formalization of assessing the information security process of IS assets, and the localization of bottlenecks in the IS protection, is dealt with in the article. A distinctive feature of the application is the use of the Federal Service for Technology and Export Control of Russia (FSTEC of Russia) threat data bank for modeling the attack tree. The developed software application allows you to reduce time, simplify the process of assessing the security of an IS, and also visualizes the threat modeling process. The scope of the developed software product may be small and medium-sized businesses, as well as state-owned enterprises.
Applying intelligent systems of speech recognition for optimizing the algorithm of noise reduction in audio records
Authors: Ivanov A V , Fazluktinov P S , Kolesnev V A 
Published: January 2020

Abstract
The effectiveness of applying intelligent systems for speech recognition in speech intelligibility estimation is considered. The experiment with employing adaptive filtering to reduce ambient noise in audio records for further analysis of speech intelligibility with applying intelligent systems for speech recognition. Analysis of intelligibility with applying computer speech recognition is found to provide the intelligibility level close to a subjective method and differ not more than 6% averagely. The architecture of a Web service for automated noise reduction in audio records and automatised analysis of intelligibility for each result is designed. The recommendations on applying the obtained results to improve the speech security level and noise reduction are given.
About the methods of forming a test signal in the instrumental evaluation of speaker clearance
Authors: Trushin V A , Khitsenko V E 
Published: January 2020

Abstract
This work presents the analysis of the possibility of creating a speech-like test signal for formant methods of assessing speech intelligibility based on the tables of syllables and words, random selection of speech elements from the database, the synthesis of sound files. Experimental research of the synthesized speech spectra, as well as its probability density, has been carried out. It is shown that the spectral and statistical characteristics of the synthesized speech-like test signals of the three voices of “speech choir” type coincide with the similar characteristics of real speech signals. Articulation tests of speech intelligibility by using synthesized speech-like interference with different signal-to-noise ratios showed the possibility of reducing the integral level of interference by 12 ÷ 15 dB in comparison with noise-like interference. There is discussed the direction of further research of improving the efficiency of generation of speech-like interference.
Research and selection of methods for operational control of diffusion coefficient in block products made of capillary-porous materials
Authors: Belyaev V P , Varepo L G , Belyaev P S 
Published: January 2020

Abstract
For studies of heat and mass transfer in porous media, operational pulse methods are becoming increasingly common. Unlike most known methods, they eliminate the need for destruction of controlled products for preparing special samples of a given configuration. The metrological analysis of the methods providing the possibility of measuring the diffusion coefficient of polar solvents in block products made of porous materials without their destruction is performed. The areas of their preferred use are justified in the context of ensuring acceptable accuracy, in the presence of pronounced anisotropy of properties including.
New matrix for geometrical product specifications on coordinate basis
Authors: Glukhov V I , Varepo L G , Shalay V V , Grinevich V A 
Published: January 2020

Abstract
This study is devoted to the recent problem of quality assurance of technical products in the design process. However, it is impossible to solve this problem by using international standards ISO and geometrical product specifications developed by ISO technical Committee ISO/TC 213. They lack a reference system of geometrical characteristics, i.e. the coordinate systems of the products are not applied. On the other hand, the technical committee ISO/TC 184 – "Industrial automation systems and integration" introduced in their standards coordinate systems for the design of machine tools with numerical control, which made parts of products, 40 years ago, since neither design nor manufacture, nor the development of control programs or the control of parts after processing can be without coordinate systems. At the beginning of the XXI century, the same technical committee developed a series of international standards for the implementation of electronic geometrical 3D models of products, in the structure of which coordinate systems were introduced. Consequently, the coordinate system of products should be introduced in the standards for geometrical specifications ISO-GPS. With that study purpose, a new matrix of common GPS standards of a higher level on a coordinate basis was recommended.
Regular linear surfaces in architecture and construction
Authors: Korotkiy V A , Usmanova E A 
Published: January 2020

Abstract
Linear surfaces are widely used in engineering, architecture and construction, which is explained by their simplicity and adaptability. The linear surface is formed by the movement of a straight line sliding along curvilinear guides. The shape of the guides is determined by the architect-designer and depends on the geometric boundary conditions. At the same time, the surface must meet certain aesthetic criteria. As a result, the shape of the curved guides may be overly complex, and the designed surface becomes irregular, that is, it does not have an exact analytical description. For visualization of the irregular surface, two-dimensional spline approximation methods (Koons surface, Bezier, NURBS surfaces) are used. The technology for making such a surface is, as a rule, extremely complicated. The article proposes a simplified graphical algorithm for constructing a regular linear surface, given by flat guides of arbitrary shape. The algorithm is based on approximation of the guide lines by arcs of curves of the second order. To build a linear surface that passes through given guides, the method of dividing the chords into proportional parts is used. In the general case, a proportional or projective correspondence is established between the points of the chords. The points of division are transferred to curvilinear guides by the method of central or parallel projection, after which the corresponding points are connected by segments of straight lines. In addition to general surfaces, the article considers oblique transition surfaces and wedge-shaped surfaces. The surface of an oblique transition rests on arcs of circles of the same radius. The wedge-shaped surface contains one or two rectilinear guides. The use of such surfaces in the practice of architectural and construction design allows to create a variety of forms while ensuring good technological conditions for the manufacture of the supporting framework of the designed surface.
Construction of a discrete planar contour by fractional rational Bezier curves of second order
Authors: Panchuk K L , Myasoedova T M , Odinets M N 
Published: January 2020

Abstract
A solution to the problem of formation of a smooth closed curve given an array of points is proposed. For the curve, a spline consisting of fractional rational Bezier curves of second order is taken. It is shown that upon appropriate reparametrization, the standard form of representation of this Bezier curve can be reduced to a more simple form. This form is convenient in construction of a closed spline from said segments, which are connected in the process of formation according to the second order of smoothness. Depending on the calculated value of control parameter in the proposed form of representation of fractional rational Bezier curve, it is possible to construct a closed spline of segments of certain curves of second order.
Early detection of the beginning of a gradual change in properties insulating materials
Authors: Pavlov V I , Gribkov A N , Selivanova Z M , Belousov O A , Belyaev M P , Nagornova I V 
Published: January 2020

Abstract
Procedure of early detection of a gradual change in insulating materials properties (disorder) is developed on the basis of thermal conductivity degradation under the hostility exposure. In the procedure of Bayesian statement development for early detection of a gradual disorder beside the initial data in which the disorder is searching it is proposed to use the additional information from indicators indirectly proofing a possible disorder. The simulated results showed that the value of delay in the detection of gradual change beginning of thermal conductivity in various insulating materials is reduced by an average of 20% in comparison with the existing procedures. The worked out procedure is meant for implementation in information-measuring systems of materials properties and process characteristics control.
Improving the accuracy of geometric model to the mark out networks for high-rise buildings
Authors: Shekhovtsov G A , Zhilina N D , Pavlov A S , Raskatkina O V 
Published: January 2020

Abstract
This article describes the various options for using angular and linear-angular triangulation to create the mark out networks on the floors for high-rise buildings construction. A polynomial addition of geometric data is proposed to obtain an estimate of accuracy. The method for estimating the accuracy of geometric constructions using gradients of directions, angles and distances is considered. The numerical example shows the simplicity and high efficiency of this method. The calculations were performed using spreadsheets.
Approximation of distribution law of experimental test data to assess reliability of information-measuring and control systems
Authors: Zyryanov Yu T , Ryazanov I G , Naumova A Yu , Muromtsev D Yu , Chernyshov N G , Trapeznikov E V 
Published: January 2020

Abstract
Methods of approximation for the distribution law of experimental data find wide application in problems of reliability assessment in tests of both hardware and software of software modules of information-measuring and control systems (SM IMCS). Thus, the main task is to solve the problem of increasing the accuracy of the approximation and simplify experimental data processing. In this paper various modification types of Pearson distribution for data taking both positive and negative values, and for data taking only positive values are considered. The described modifications allow one to solve a range of problems related to the existing distributions, as well as to improve the simplicity of the approximation procedure. Pearson logarithmic distributions are proposed for experimental data that take only positive values.
Deformation of flexible gear of harmonic drive
Authors: Baris A V , Vanag Yu V 
Published: January 2020

Abstract
Harmonic drives have high load capacity, kinematic accuracy, and small weight and dimensions’ parameters, compared to other transmissions. Due to the variable stiffness in the areas of the teeth and tooth sockets, the toothed rim of the harmonic drive during bending takes the shape of a polyhedron. This effect most strongly appears when the gear ratio is less than 60. For this reason the geometric synthesis of harmonic drives with gear ratios of less than 60 is an important task. In this paper, the law of deformation of the flexible gear is given by harmonic oscillations of the inner angles of the polygon. The dependences which allow the teeth of a rigid gear to be profiled, taking into account the effect of the “polyhedron” of the toothed rim of the flexible gear are obtained. The proposed dependences are the basis of the geometric synthesis of harmonic drive elements.
Survivability assessment of damaged rod-type vibration systems
Authors: Filippova Yu F , Doronin S V 
Published: January 2020

Abstract
From the point of view of dynamics, structural damage manifests as a decrease of stiffness of the material of structural elements or a decrease of their masses (removal from the system due to destruction). The effect of damage on the behavior of vibration systems consists in redistribution of stiffnesses and masses and manifests as a change in natural frequencies and vibration modes. The survivability of damaged vibration systems is viewed as the sensitivity of their natural frequencies and vibration modes to various types of damage. The survivability analysis technology consists in a multivariate modal analysis of the structure with variation in its damage. The article considers the results of numerical simulation of frequencies and modes of natural vibrations of a high-pressure xenon tank mounted on the hull’s primary structure after various types of damage to the latter. The tank is a part of the electric propulsion engine of a spacecraft. The results allow assessment of the sensitivity of dynamic characteristics of the tank to damage to the primary structure.
Mathematical model of the working process of the road sweeping machine as a complex dynamic system
Authors: Korytov M S , Shcherbakov V S , Titenko V V , Ignatov S D , Tsekhosh S I 
Published: January 2020

Abstract
The article is devoted to the urgent problem of improving the roadway cleaning efficiency. To achieve maximum cleaning efficiency, an optimal pressing force of the brush equipment to the surface being cleaned should be provided. A schematic diagram of a sweeping machine working process as a complex dynamic system was constructed including a basic machine, brush and running equipment, a hydraulic drive, a road surface, as well as a microrelief control device reflecting the effect of the microrelief on the vertical coordinate of the working equipment. A mathematical model of the working process of a sweeping machine is presented. The simulation was carried out using the MATLAB software, Simulink extension. As a result, the dependences of the vertical coordinates and the pressing force of the brush equipment were established. In most cases, the brush positioning control is provided by a standard hydraulic drive; however, when the dimensions of a pothole are large enough, the standard hydraulic pump does not guarantee the required speed of the control device so that the deviations of the vertical coordinate could be compensated. To improve the speed of the brush positioning control device, the standard hydraulic pump was supplemented with an additional pump switching on only at particular periods of time.
Hydroelastic Response of an End Wall Interacting with a Vibrating Stamp via a Viscous Liquid Layer
Authors: Popov V S , Popova A A , Christoforova A V 
Published: January 2020

Abstract
The mathematical modelling of a vibrating stamp interaction with a flexible restrained end wall (bellows) of a narrow channel via a viscous incompressible fluid is carried out. The narrow channel formed by two parallel walls and filled with a viscous liquid is investigated. The liquid motion in the channel is considered as a laminar one. The bottom channel wall is absolutely rigid, and the top one is the absolutely rigid vibrating stamp. At the right edge of the channel, the end wall with flexible restraint (bellows) is installed, and at the left one, there is a free liquid flow. The problem of longitudinal hydroelastic vibrations of the channel end wall is formulated and solved analytically. The distribution laws of velocities and pressure in the fluid layer along the channel are found. The motion law of the channel end wall is determined. The amplitude frequency and phase frequency responses of the end wall for steady-state harmonic oscillations are constructed. The mathematical modelling has shown the possibility of damping the channel end wall (bellows) vibrations by changing the distance between the channel walls or by changing the liquid viscosity in the channel.
The influence of the vertical cantledge mass on the vibratory drum vibrations during the material compaction
Authors: Tarasov V N , Boyarkina I V , Boyarkin G N , Serebrennikov V S 
Published: January 2020

Abstract
The road roller vibratory drum is considered as a three-mass vibration system consisting of the eccentric weight mass m
1, vibratory drum mass m
2, additional mass m
3, which is transmitted to the vibratory drum axis through the roller frame. Differential equations of vertical vibrations were formulated, they were solved, analytical expressions were obtained of the amplitude A
1 of the vibrator drum vertical vibrations and of the amplitude A
2 of the additional mass m
3 vibrations, rigidly connected with the road roller frame. The dependences of the vertical vibration amplitudes A
1 and A
2 on the vibration frequency, mass ratio (m
1 + m
2) and m
3, stiffness factors and viscous friction factors of the soil and rubber-metal shock absorbers have been established. The additional mass m
3 is considered as an additional shock absorber that protects the roller frame from vibration. The differential equation of the additional mass m
3 vertical vibrations has been obtained, which are excited by the harmonic inertia force. The analytical dependence conclusion for the determination of the dynamic factor Kd
as the ratio of the dynamic and static vibration amplitudes of the additional mass m
3 of the vibratory drum have been specified. The specified dependence of the driving force transfer factor K determination on mass m
3 to the roller frame has been obtained. The diagrams of the dependence of Kd
and K factors on the frequency ratio of forced and natural vibrations of the mass m
3 are constructed.
Prediction of cracks growth in the main pipeline based on the elastoplastic model
Authors: Vansovich K A , Aistov I P , Beselia D S , Nakhlestkin A A 
Published: January 2020

Abstract
A method is proposed for predicting the growth of surface cracks in the wall of a main pipeline under the action of exploitative forces. An elastoplastic model for the growth of surface cracks under biaxial loading is described using steel 20 as an example. Using the ANSYS program, a crack growth modeling algorithm has been developed which takes into account residual stresses. The forms and magnitudes of crack opening for variable cycles of pipeline loading are determined. The influence of the stress state before the crack tip at variable loads on the growth rate of cracks has been established. The effect of overload cycles on crack growth is researched. A method for predicting the development of cracks according to the internal diagnostics of the pipeline and monitoring their loading is described.
Technology of thermo-mechanical hardening of rotary carbide tools
Authors: Vasil’ev E V , Rauba A A , Abakumov A N , Zakharova N V , Sergeev V A 
Published: January 2020

Abstract
Improving physical and mechanical properties of tool materials is a complex scientific and technical problem. Application of thermo-mechanical hardening of monolithic carbide tools allows increasing the microhardness of at least 30%, which has a significant impact on the tool operating life. The use of the developed device allows for thermo-mechanical hardening of rotary carbide blanks for the manufacture of cutting tools, with high productivity and stability of the results.
Classification of crops by multispectral satellite images of sentinel 2 based on the analysis of vegetation signatures
Authors: Khamdamov R , Saliev E , Rakhmanov Kh 
Published: January 2020

Abstract
This article describes crop recognition methods from multispectral satellite imagery of Sentinel 2. The feature space includes taking into account parameters such as brightness and color of optical images over the entire channel of Sentinel 2 spectrozonal satellite imagery. The signs of multispectral images for various terrain classes in satellite images are analyzed. A comparative analysis of the classification results by the methods of “Expectation Maximization” and “k -means” has been compiled.
Computer modeling of filtration processes with piston extrusion
Authors: Kurbonov N , Aminov S 
Published: January 2020

Abstract
In this work, computer simulation of filtration processes based on the laws of hydrodynamics is considered. The adequacy of the developed models was verified by conducting a series of computational experiments. Created mathematical and software serves the purpose of research, forecasting and decision-making in the development and design of oil and gas fields.
Software for the computational experiment “Synthesis of the topological structure of the cognitive model”
Authors: Lozhnikov V , Marenko V 
Published: January 2020

Abstract
There is a great number of applications used today to support decision-making in socio-economic sphere. Various approaches and tools are used to implement the applications. The article provides the overview of scientific publications developing software algorithms based on cognitive modeling and fuzzy logic. The authors develop the software tool to conduct simulation experiments to synthesize the topological structure of a cognitive model for socio-economic facilities and objects. The results from the simulation experiment aimed to study the structure of the cognitive model taken as an example, are presented as a digraph “Impact of the Media on Mass Audience”. The software uses the programming language Java, JavaFX.
Definition of line formula on images
Authors: Narzillo Mamatov , Abdurashid Samijonov , Nilufar Niyozmatova , Musokhon Dadakhanov , Erkin Rahmonov 
Published: January 2020

Abstract
The article considers the problem of determining line formulas in a monochrome image. To solve this problem, a scheme, method and algorithm for determining the line coefficients using a finite difference are proposed. Based on the proposed method, it is also possible to solve the problems of approximation and interpolation.
On generic NP-completeness of the graph clustering problem
Authors: Rybalov Alexander 
Published: January 2020

Abstract
Generic-case approach to algorithmic problems was suggested by Miasnikov, Kapovich, Schupp and Shpilrain in 2003. This approach studies behavior of an algorithm on typical (almost all) inputs and ignores the rest of inputs. In this paper, we study the generic complexity of the problem of clustering graphs. In this problem the structure of relations of objects is presented as a graph: vertices correspond to objects, and edges connect similar objects. It is required to divide a set of objects into disjoint groups (clusters) to minimize the number of connections between clusters and the number of missing links within clusters. We prove that the graph clustering problem is NP-hard with respect to generic analog of polynomial Turing reduction. Supported by Russian Science Foundation, grant 18-71-10028.
Deep learning neural networks in fuzzy modeling
Authors: Sotvoldiev D , Muhamediyeva D T , Juraev Z 
Published: January 2020

Abstract
Deep learning neural networks have achieved remarkable success in various fields of application of artificial intelligence. This technology, which grew out of studies of artificial neural networks, has shown superior performance compared to other machine learning algorithms in areas such as image and voice recognition, natural language processing, and others. The use of deep learning neural networks in the construction of a fuzzy model is proposed.