bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on monolayer h-BN cell strain effect vacancy stability
Authors: Serzhantova M V , Titov M A , Obvertkin I V 
Published: November 2019

Abstract
This article presents a research on Hexagonal Boron Nitride (h-BN) monolayer cell strain effect 2 % and 4 %. Structure of h-BN with nitrogen vacancy, with boron vacancy and with divacancy was considered for this. The calculations were carried out within framework of the density functional formalism with gradient corrections and using the VASP package. Vanderbilt Ultra-Soft Pseudopotential was used in the course of the calculations. It is possible to conclude that nitrogen vacancies are the most stable, regardless of monolayer deformation on the results obtained. Understanding of atomic scale stability and dynamics of defects in such systems is crucial for predicting their properties and applications in electronics.
Simulation of the ball mill loading movement and study of its operation modes depending on geometrical parameters of the lining
Authors: Fadin Y M , Khakhalev P A , Degtyarev P A 
Published: November 2019

Abstract
The article analyzes virtual experiments of the lining of a ball-type drum mill depending on a number of factors: the diameter of a mill, the diameter of grinding bodies, the number and height of liner lifters. The numerical experiment was performed using the EDEM software; a parametric model of the mill housing with variable liner lifters was created and imported, studies were performed using the virtual simulation method. A virtual experiment made it possible to study the grinding process without interacting the equipment which eliminates the risk of injury during and allows for more accurate research data. As a result of simulation of virtual experiments, values of the average kinetic energy of grinding bodies and the number of their collisions were determined.
Instability of the Ni-Al combustion wave in the Zeldovich-Barenblatt parameters
Authors: Gulyaev P , Dolmatov A , Jordan V 
Published: November 2019

Abstract
The study of the thermal structure of the combustion wave of self-propagating high-temperature synthesis using differential chronoscopy (DCS), using the example of the Ni-Al system, demonstrates the possibility of estimating the criterion of thermal diffusion instability of the front in accordance with the Zeldovich-Barenblatt model. The application of standard image recognition methods, in the form of a high-speed Trace-transform algorithm, to a 2D chronogram of the interframe difference in the coordinates of the combustion front, calculated from high-speed video recording of the propagation of a SHS wave as a DCS-map, demonstrates the ability to control the sustainability mode of the burning wave in situ.
Technological capabilities of direct-flow stabilizers in gas-piston engines
Authors: Bashmur K A , Petrovsky E A , Geraschenko Yu A , Makolov V A , Tynchenko V S , Shadchina Yu N 
Published: November 2019

Abstract
The present study describes problems related to the rational use of associated petroleum gas. In particular, the problem of effective gas flow stabilization at the gas-piston engine outlet is investigated. The analysis is applied to such kind of engine stabilizers and detailed studies revealed their major drawbacks. A hypothesis concerning the efficiency of using a direct-flow stabilizer (turbulizer/swirler) as a flow stabilizer is proposed. Simulation flow modeling in the direct-flow stabilizer is carried out. The simulation is carried out with the help of the SolidWorks Flow Simulation program for different profiles of the stabilizer flow section. The hypothesis on the efficient use of such units is confirmed. In terms of flow swirling the most effective flow section of the direct-flow stabilizer is revealed.
Intensification of the grinding process in vibration mills
Authors: Bogdanov V S , Bogdanov N E , Bogdanov D V , Samsonova P S 
Published: November 2019

Abstract
The paper deals with the problems of intensification of grinding in vibration mills with harmonic, biharmonic and polyharmonic vibrations. In particular, as one of the ways to solve this problem, it is suggested to use the adjustable amplitude-frequency characteristics of the movement of the vibrator with polyharmonic vibrations. The paper presents a new design of the vibration mill with polyharmonic vibrations, which has three vibratory drives mounted on the grinding chamber with the possibility of varying the frequency, direction of rotation, mass of unbalanced masses, as well as the geometric arrangement of the vibratory drives relating to the axes passing through the center of gravity of the vibration mill.
Simulation of manufacturing systems using BPMN visual tools
Authors: Vlasov A I , Gonoshilov D S 
Published: November 2019

Abstract
The paper presents results of the methodology research related to simulation of manufacturing systems in the context of electronic product manufacturing using BPMN visual tools. Modern production of electronic equipment is a complex, distributed, multi-factor system, regarded as a socio-production system, which is a part of a more global socio-economic system. The authors provided the algorithm to synthesize integrated visual models of distributed socio-production systems. There is also a brief overview of main BPMN visual tools. Based on the research findings, the authors provided recommended applications of BPMN tools.
Radiation-resistant robotic manipulator controlled by 6-DoF haptic control device to perform technological tasks in hot cells
Authors: Prikhodko V V , Sobolev A A , Zhukov A V , Chavkin E M , Fomin A N , Levshchanov V V , Pavlov S V , Svetukhin V V 
Published: November 2019

Abstract
The paper describes the results of developing a radiation-hardened robotic complex including the following original constituting elements: a robotic manipulator with a 2-finger gripper, a 6-DoF control device with force feedback, control software. The implementation of rotational motion of joints of the robotic manipulator through coaxial gear shafts resulted in its high resistance to ionizing radiation of up to 107 Gy. The control device features high ergonomics similar to that of mechanical master-slave manipulators. The control software has a modular structure and contains both original and the state-of-the-art program components. A prototype of the robotic complex was built which demonstrated the capability of performing typical technological operations in a demo hot cell in both manual and automated modes.
Device for electropulse press-fitting of pipes into a tube sheet of shell-and-tube heat exchanger
Authors: Shalaurov R S , Tynchenko V S , Petrovsky E A , Bukhtoyarov V V , Kukartsev V V , Tynchenko V V 
Published: November 2019

Abstract
The article presents theoretical information about pulse methods of press-fitting pipes into the tube sheet of a shell-and-tube heat exchanger. The analysis of the existing designs of devices for electropulse press-fitting pipes in the tube sheet is made; the weaknesses of these devices are identified. The design of the device for press-fitting into the tube sheet by the electropulse method is developed, which is devoid of the disadvantages of the designs considered in this article. A distinctive design decision is the use of a reusable shank with a support flange. The shank is made of metal and is presented in the form of bellows compensator. The second distinctive decision is the use of a gap sealer between the device body and the pipe, which has no chemical affinity with the device body. The paper describes in detail the principle of operation of the proposed device. In addition the authors developed a drawing of the proposed design of the device for press-fitting pipes into the tube sheet of the shell-and-tube heat exchanger.
Hierarchical object recognition system in machine vision
Authors: Kokoulin A N , Yuzhakov A A , Kiryanov D A , Stanisavljevic N , Batinic B 
Published: November 2019

Abstract
Authors propose an efficient architecture of the hierarchical machine vision system and the multimedia transfer algorithm for a distributed client-server system which can adapt to mobile network speed variations. This algorithm is based on the wavelet transform of an input multimedia source and allows for data exchange using all the available bandwidth of the unstable mobile network. The main principle of the hierarchical recognition system is the distributed processing network utilizing the “coarse-fine” paradigm in computer vision. Each source of a video stream is processed in-place by the tiny SoC computer which acts as an Edge Computing Unit and detects the presence of an object fragment in a video frame and crops the bounds of the ROI. The resulting stream containing ROI is directed to the main server if the object is detected, reducing traffic and resource consumption.
Determination of the working area and singularity zones of the 3-RRR robot based on the non-uniform coverings method
Authors: Rybak L A , Gaponenko E V , Malyshev D I , Behera L 
Published: November 2019

Abstract
The paper considers the optimization algorithms applied to define the working area of a flat 3-RRR-mechanism. The system of inequalities considering the acceptable range of an argument of driving angles arcsine was used to define the working area. The condition of equality of Jacobian matrixes to zero for the first and second type of singularities was used to define special positions. The paper presents the results of modeling for eight combinations of rotation angles of driving pairs. The received results can be used to choose the geometrical parameters of a 3-RRR mechanism setting the boundaries of the working area through the technological process and to plan the movement trajectory of an output link to avoid uncontrollable mobility or jamming of the mechanism in special positions.
New methods for manufacturing composite materials
Authors: Zagorodnuk L Kh , Lesovik V S , Elistratkin M Y , Sumskoy D A , Makhortov D S , Zolotykh S V 
Published: November 2019

Abstract
The law of affinity of structures developed by the authors is based on basic properties and regularities inherent in the basic and bonding material and the combination of properties that ensure properties of the contact layer for reliable and durable construction operation. In recent decades, new composites with a number of required physical, mechanical and operational properties have been developed. To produce modern efficient materials which would be uniform, strong and durable, it was proposed to apply the law of affinity of structures.
Correlation analysis of the dependence of the properties of steel on its composition based on the processing of reference information
Authors: Evdokimov R A , Derbisher E V , Derbisher V E , Germashev I V 
Published: November 2019

Abstract
In the article the possibility of identification of grade steel properties on the platform “structure - properties” dependence by the linear correlation analysis of information from standard reference books is considered. Clearly significant coefficients of correlation are found for a number of the alloying elements. The results can be used for forecasting of physic and mechanical properties of alloys with the alloying additives.
Plasma hardening of medium carbon steels
Authors: Safonov E N , Mironova M V 
Published: November 2019

Abstract
The structure, size and hardness of the zone of hardening of pre-annealed steels (30XHMA, 34XH1M, 35XH2Φ, 38XΓH, 40XHMA, 40XH2MA, 45) was studied after treatment with a plasma arc of direct polarity. It was shown that plasma hardening forms a thin layer of martensitic-austenitic structure with variable composition and hardness on the treated steel surface. The zone subjected to hardening was represented by marten site of different dispersion and ferrite veins. Between the quenching zone and the base metal there was a transition zone with a gradient structure of plate perlite and elements of perlite-ferrite base, the share of which was gradually increasing. The structural-phase structure of this zone provided a smooth transition of mechanical properties from the hardened layer to the base metal. Dependences for management of a structural condition, hardness and depth of a zone of hardening were determined.
Method for studying mixed problems in modeling structurally inhomogeneous materials with coatings
Authors: Pavlova A V , Telyatnikov I S 
Published: November 2019

Abstract
The paper investigates steady-state oscillations of an elastic medium of a layered structure, containing internal defects such as flat cavity-cracks and coating, using the differential factorization method. Systems of integral equations that describe relations between stresses and displacements in the planes of layer separation with jumps of displacements on the crack faces are constructed. The authors obtain solutions of the resulting integral equation systems for particular cases of areas occupied by defects in the final form using the Wiener-Hopf integral factorization methods or the methods of fictitious absorption.
Reactivity of dispersed schungite to bitumen
Authors: Vysotskaya M A , Kuznetsov D A , Lukash E A , Kharlamov E V 
Published: November 2019

Abstract
Some aspects of the use of schungite mineral powder to obtain effective compositions based on bitumen are considered in this paper. The high reactivity of dispersed schungite to bitumen is shown. The studies are performed by studying the water extracts from suspensions, as well as the state of the surface of the powders and the concentration of active surface centers using the indicator method of fixing the distribution of adsorption sites (DAS) in the spectrophotometric version. Based on the analysis of the results obtained it is concluded that the molecules of organic substances contained in bitumen can actively interact with the surface of schungite. At the interface between the binder and schungite the processes take place that are accompanied by the formation of a strong adsorption layer which is necessary for the formation of a high-quality and durable composite. The presented studies of asphalt binders confirm the conclusions and show that asphalt concrete pavements using shungite mineral powder will be able to work in a wider temperature range both for high summer and low winter temperatures.
Radioactive and non-radioactive aerosol permeability through two types of analytical filters
Authors: Khalaf H N B , Mostafa M Y A , Zhukovsky M 
Published: November 2019

Abstract
AFA analytical filter is the most used one of Petryanov filters in health protection and radiometric and analytical measurements. Therefore, the properties of this filter like efficiency and the permeability of the non-radioactive and radioactive aerosol particles are more important for accurate estimation and protection. AFA Petryanov filters (RSP-20 and RMP-20) are the most popular filters in Russia. In this work, an experimental setup has been constructed to estimate the permeability of the non-radioactive and radioactive aerosol particles through these two type of analytical filters. A standard radon chamber (2 m3), at Ural federal university is used to create radioactive aerosol. Non-radioactive aerosol or ambient aerosol is considered from ambient indoor air. Aerosol diffusion spectrometer (ADS) is used to measure aerosols concentration and number size distribution with range from 1 nm to 10 μm. The activity size distribution is determined with screen diffusion battery and the AIP-2 cascade impactor with range (0.5-20μm). The measurements are repeated before and after filters to study the PFs filters dispersion and permeability for non-radioactive and radioactive aerosols. ADS filter is used to measure the aerosol concentration and number size distribution before and after filters in ambient air with spatial construction. The effect of size modes of the non-radioactive and radioactive aerosols penetrating the filters is studied. At low aerosol concentration, the filters catch all free unattached radon decay products (RDPs) (1-5 nm) and the most collected activity with active median thermodynamic diameter, AMTD, ∼ 20 nm. In the radon chamber at high aerosol concentration, the activity of RDPs free unattached fraction nearly removed. The collected activity with AMTD ∼ 20-40 nm is more significant.
Improvement of operational properties of parts permanent joints with ultrasound technologies use
Authors: Prikhodko V , Karelina M , Sundukov S , Sukhodolya A , Moiseev V 
Published: November 2019

Abstract
The authors consider the improvement of producing permanent joints technology issue due to ultrasonic vibrations use. As a result of main problems the analysis which arising during the permanent joints performance, and effects that occur in liquid and solid bodies under the ultrasound action, options were proposed for using ultrasonic vibrations in technologies for producing welded, riveted, adhesive and press joints. The complex of experimental studies was carried out, which showed using vibrations effectiveness in considered permanent joints. Ultrasonic technology use allows improving obtained joints performance properties and intensifying the processes that ensure assembly quality.
Determination of output link positioning error of tripod module using numerical method
Authors: Gaponenko E V , Malyshev D I , Behera L 
Published: November 2019

Abstract
The article presents a method for the determination of the tripod module output link positioning error, which is part of a robotic complex with relative manipulation mechanisms. The method of non-uniform coverings is used to solve this problem, which allows approximating the set of solutions of systems of equalities or inequalities describing the working tool position. The algorithm of approximation of the tripod module output link positioning error depending on the errors of the drives has been synthesized. As a result of modeling, an approximated error was obtained and graphically shown. The results can be used to select the geometric parameters of the tripod module and determine the accuracy of manufacturing robot parts, providing the technological errors of the working tool positioning specified by technological processes.
Modulation method for measuring thermal resistance of solar batteries and its practical implementation
Authors: Smirnov V I , Sergeev V A , Gavrikov A A 
Published: November 2019

Abstract
This paper describes a modulation method of measuring the thermal impedance of power solar batteries. The analysis of the dependence of thermal impedance on modulation frequency allows determining thermal impedance components corresponding to the structural elements of a battery. The apparatus used for the experiments, its principles, functional diagram and experiment conditions are described. It is experimentally shown that the magnitude of the variable component of junction temperature is mostly independent of the value of the heating power. This is explained by current crowding, that is a non-uniform distribution of the current through the junction and formation of local heating areas of the semiconductor. The formation of local heating areas is confirmed by the experimentally detected thermal resistance component, which takes place due to the temperature difference between local heating areas and the other part of a semiconductor of a solar battery. Another confirmation of the local heating areas is a sharp thermal resistance decrease with an increase of the heating current. The experiments confirm the possibility of the apparatus, which uses the modulation method, to measure the thermal resistance of power (up to 500W) solar batteries.
Mathematical modelling of the “Pipeline – pressure sensor” system
Authors: Velmisov P A , Pokladova Yu V 
Published: November 2019

Abstract
A mathematical model of a mechanical system for measuring the pressure of the working medium in an engine is proposed. The system includes an axisymmetric pipe with fluid and a fluid pressure sensor. An integro-differential equation of the dynamics of the elastic element of the sensor is obtained, which relates its deformation to the pressure and temperature of the medium at the entrance to the pipeline (for example, at the exit from the engine combustion chamber). A numerical-analytical method for solving this equation is proposed and examples of numerical calculations of the element dynamics are given.
Rolled stock structure and surface condition factor for quality of automobile fasteners insurance
Authors: Pachurin G V , Filippov A A , Nuzhdina T V , Matveyev Yu I , Mukhina M V 
Published: November 2019

Abstract
Initial blank for the production of calibrated rolled stock is hot-rolled steel, ductility of which is largely determined by the structure and quality of the rolled stock surface. Hot-rolled steel should have a high degree of surface cleanliness and defect-free cross-section. In this paper, using the example of hot-rolled steel 40X, it is shown that the structural condition and quality of the rolled stock surface largely determine the further quality of calibrated rolled stock for automobile long length bolt products made from it. In this case, the mechanical characteristics, which are the most widely used indicators of the steel quality, are largely determined by plastic and heat treatment, which change the structure at the macro- and microscopic level.
3D simulation of aggregation of red blood cells for the study of the optoacoustic response
Authors: Kravchuk D A , Starchenko I B 
Published: November 2019

Abstract
The paper presents mathematical modeling of the distribution of different shapes of red blood cells in plasma. The obtained two-dimensional and three-dimensional tissue models are designed to simulate acoustic response as a result of optoacoustic effect and to calculate the number of red blood cells and determine their shape. The results of mathematical modeling allow preparing the model solutions of blood using polystyrene microspheres. Red blood cells produce quasi-spherical assemblies in different pathologies that occupy a large part of volume (from 30 % to 50 %). The purpose of the research was to simulate spherical aggregates without intersections with the same parameters and unique spatial distribution determined by the structural factor. The main benefit of presented method was investigation of different aggregate compactness with the same size of aggregates containing erythrocytes of different shapes. In the result of 3D computer simulation the total maximum volume fraction of cells was 16 %. The procedure of cells distribution account in aggregates allowed obtaining maximum aggregate compactness ϕi
= 40 %.
Directivity of hydroacoustic systems with parametric array in marine conditions
Authors: Kirichenko I A , Starchenko I B 
Published: November 2019

Abstract
The paper presents the results of generalization of theoretical and experimental studies of the influence of hydrophysical inhomogeneities on the directional characteristics of the parametric array in the framework of problem solution of improving the efficiency of directional properties of adaptive hydroacoustic systems with parametric emitting arrays. The results of calculations of the directional characteristics of the parametric array obtained on the basis of the Khokhlov-Zabolotskaya-Kuznetsov model are compared with the results of experimental measurements of the directional properties of the parametric array. The normalized dependence of the width of parametric array beam pattern was obtained on the reduction of the difference frequency relative to the central frequency of the pump waves from 5 to 16 times. The influence of the sound velocity change on the direction properties of the parametric array was estimated. The normalized dependence of the width of beam pattern of the parametric array on the value of the sound velocity at the surface of the pump transducer was obtained.