bluuebunny/crossref_metadata_2025_split huggingface dataset:
Induction brazing technology for pipeline connections of an automated gas metering unit
Authors: Kukartsev V V , Cherepanov A I , Dokshanin S G , Ezhemanskaya S N , Korpacheva L N , Yu Vaitekunaite P 
Published: November 2021

Abstract
The article discusses the connection of pipelines of an automated gas metering installation. Welding is considered as the main method of connecting pipelines and an induction pack of heating methods as proposed by the authors. In the work, a threaded connection is calculated according to the method of Anuryev V.I. On the basis of the calculations carried out by the authors using formulas from the designer’s handbook, a schematic diagram of the pipe fastening in the process of induction soldering is developed. A schematic diagram of a pipe bend is also being developed. The approach proposed by the authors will repeat the connection of pipelines of oil and gas equipment using induction packs and increase the reliability of brazed structures.
Relative positioning of UWB tags with deferred ranging
Authors: Krasnov T V , Tokarev R I , Zubicks A A 
Published: November 2021

Abstract
The aim of the work is to develop relative navigation systems based on ultrawideband signals. In a relative navigation system, measurements are transmitted not to the base station, but to mobile subscribers who solve the navigation problem. The work of the network with the SDS-TWR distance measurement protocol is shown and a method for reducing the load in the network of devices is proposed, in which delayed distance measurements are used.
Investigation of the parameters of direct laser growing and subsequent processing to obtain a defect-free structure of a material made of a heat-resistant EP648 alloy
Authors: Khakimov A M , Nikitin K V , Zhatkin S S 
Published: November 2021

Abstract
This paper presents the development of stable modes of additive technology of direct laser growing, using the starting material - a metal powder made of heat-resistant EP648 alloy of Russian production. The subsequent heat treatment of the manufactured samples was tested in order to avoid the formation of cracks in the structure of the material formed as a result of the presence of internal stresses after surfacing. Recommendations for further research are given.
The numerical optimization methods usage for choosing blisk trajectory during PVD coating deposition
Authors: Oleinik A , Vardanyan E 
Published: November 2021

Abstract
PVD coating deposition is a considerable way to prevent the gas turbine engine blade from erosive wear. However, the process for blisks is complicated by the part complex shape which leads to uneven film thickness. The research considers an approach for optimizing the blisk trajectory in a vacuum chamber. This approach reduced the calculated non-uniformity of the coating thickness from 4.3-10.8 to 6.2-10.4 μm.
Improving the accuracy of designing a delta robot for 3D printing
Authors: Zrazhevskiy A V , Mikhailov A V , Zalomskii A S , Kononenko V I , Sukmanov D A 
Published: November 2021

Abstract
Currently, there is a need in the industry for design changes to existing installations, such as conveyor lines, various machine tools, 3D printers, and so on. Designing delta robots for 3D printers reveals the advantages of using delta robots as working parts of printers compared to traditional designs. In this article, the direct and inverse problems of the kinematics of the delta robot are solved in a geometric way. Also, dependencies for the search for angular velocities and accelerations of the input links were obtained, which allows in the future to design more accurate working bodies of 3D printers. The research was carried out through mathematical modeling.
The Industry 4.0 technological and information processes cyber-modelling
Authors: Gurjanov A V , Zakoldaev D A , Zharinov I O , Zharinov O O 
Published: November 2021

Abstract
Cyber-modelling is the information models simulation process describing in a mathematical and formal logic languages (phenomenon models) how cyber-physical systems interaction mechanisms are united with different control laws and parameter values. The equation complexity represented in different levels of cyber-physical production systems hierarchy and non-equations of algebra, logic, end-subtraction, vector and matrices form in a discreet and uninterrupted times are defined with an aggregated number in the industrial automatics element control loop. The cyber-modelling is done for statistic and dynamic processes and equipment states being monitored in a virtual environment fixating actual in a time interval technological data. The cyber-modelling is done with integrated calculation equipment systems with parallel physical production processes of item manufacturing. The model time faster than physical processes let prognosticate the corrections modifying control signals and phase variables of cyber-physical systems united in an assembly conveyor. The cyber-modelling advantage is an expanded number of cycles to optimize the technological processes, which are calculated with integrated calculation systems using consecutive approximation method. They describe the cyber-modelling technology and propose the information models based on phenomenon cyber-physical production processes descriptions with general control theory terms, calculations and connection for hierarchy controlling structures.
Improving the quality parameters of a fibrous pulp in the process of knife milling
Authors: Zyryanov D E , Reshetova N S , Marchenko R A 
Published: November 2021

Abstract
Pulp and paper products in the modern world are used in a variety of types and areas, due to which the issue of improving paper production technologies is relevant. The article presents the results of grinding fibrous semi-finished products using the knife method. A disc mill with an original knife set was used as the unit under study. For the most effective modes of grinding were selected to obtain raw materials with high quality indicators.
Development of technology for obtaining starch gluing modified with uzkhitan and hydrolyzed emulsion
Authors: Mardonov Salokhiddin , Shokirov Laziz , Rakhimov Khakim 
Published: November 2021

Abstract
In this article, in order to reduce the consumption of starch for gluing warp threads and reduce the cost of sizing materials used in sizing and improve the quality of threads, an effective gluing composition was created based on a hydrolyzed acrylic emulsion (GAE) and uzkhitan (chitosan and carboxymethyl cellulose), that is, corn starch polymer and studied their rheological properties. In the article, the main threads passing through the gluing process and moving at a certain speed, which are then impregnated with liquid gluing. Then they pass through a nip roller and a drying drum, are subjected to friction and form a layer of a certain thickness. A theoretical analysis of the surface of the warp threads is carried out to determine the change in the diameter of the threads when a layer of a certain thickness is formed on their surface.
Working in of roller ends and bars of cylindrical roller bearings at combined radial and axial loads
Authors: Klebanov I M , Murashkin V V , Kondratev M I , Adeyanov I E , Polyakov K A 
Published: November 2021

Abstract
The paper investigates the influence of the process of running-in the ends of rollers and sides of cylindrical roller bearings on the conditions of hydrodynamic contact of these parts: the formation of an oil film and friction. For this purpose, the results of finite element modeling of the stress-strain state of the bearing parts in contact: the inner ring, the side flange and a fragment of the axle of the wheelset, and the multi-mass simulation of the dynamics of the bearing operation are used. The influence of the yaw angle of the roller on the size and shape of the contact area on the side is investigated. The dependences for calculating the thickness of the oil film in the contact between the ends of the rollers and the flanges of the bearing rings are being refined, which now make it possible to take into account the misaligned position of these parts during their force interaction. The results are illustrated using the example of a roller bearing of standard size 232926.
Post-buckling behavior estimation of rigidly supported cylindrical composite panels in case shear
Authors: Mitrofanov O V , Osman M 
Published: November 2021

Abstract
We present the solution of the geometrically nonlinear problem of the shear-critical behavior of a thin composite cylindrical panel of small curvature of orthotropic structure. The obtained solution considers the conditions of all-round rigid support. The expression for determining the membrane stresses arising in the supercritical state is given. When considering a linear problem, expressions for determining the critical shear flow are given. A method for determining the nonlinear stress-strain state in the overcritical state for a given thickness and stacking of an orthotropic panel is presented. The obtained solutions can be used in the design of load-bearing cylindrical panels, as well as in the analysis of geometrically nonlinear behavior of defects such as delaminations.
Mathematical assessment of the depth of the passive method of induced polarization based on experimental data
Authors: Belolipetskii P V , Potylitsyn V S , Shajdurov G Y , Romanov V V 
Published: November 2021

AbstractThe article discusses a numerical model for assessing the depth for the passive method of induced polarization based on previously obtained experimental data at the Samson field (Republic of Khakassia). The model is based on the mathematical model of Komarov, who derived equations for the anomalous polarizability of a sphere observed on the Earth’s day surface, the proposed model for estimating the depth of the anomaly depends on the size of the proposed field and the induced polarization coefficient observed on the surface. In the course of the numerical assessment, it was shown that there is a convergence of data from field observations, exploration drilling and mathematical modeling.
Probabilistic nature of water and environmental standards
Authors: Rosental M , Sambursky G A 
Published: November 2021

Abstract
Determination of permissible concentrations of pollutants in relation to water bodies and water quality is the basis for further measures to form technological approaches to water treatment and wastewater treatment, to determine the standards of permissible exposure and technological indicators. The main standard, which is the basis for such calculations - the maximum permissible concentration (MPC) of pollutants or the approximate safe level of exposure (S), are threshold (deterministic) values. It is assumed that the establishment, for example, of the MPC for fisheries water bodies is based on the analysis of toxicological indicators. However, in fact, rationing is carried out on the basis of selective toxicological studies [1], which do not provide such determinism. The obtained data characterize only the influence of the selected levels of toxicant concentration on the studied organisms.
Reduction of the carbon footprint of cargo vehicles with pneumatic recovery of braking energy
Authors: Egorov A V , Kaizer Yu F , Lysyannikov A V , Zhelukevich R B , Kuznetsov A V , Shram V G , Pavlov A I , Smirnov M Yu 
Published: November 2021

Abstract
Reducing carbon dioxide emissions by passenger vehicles allows you to achieve the use of electric power plants and hybrid power plants made on the basis of thermal internal combustion engines and electric machines. However, the application of the above-mentioned approach for trucks is associated with significant difficulties due to the low specific capacity of the chemical current sources currently used. The recovery of braking energy of cargo vehicles in the pneumatic form is constrained by the need to achieve a high speed of switching on the pneumatic recuperator. In order to minimize the energy losses of the pneumatic recuperator during acceleration and steady-state. Without changing the design and reducing the reliability of the internal combustion engine, it is possible to supply air to its inlet at pressures not exceeding 350 kPa. When air is supplied to the internal combustion engine inlet at pressures of 200 and 300 kPa, it is possible to reduce specific carbon dioxide emissions by 16 and 37 % per unit of generated mechanical energy, respectively, compared to air supply under normal atmospheric conditions.
Counter-rotating electric generator for wind power plants with liquid metal energy transfer
Authors: Egorov A V , Kaizer Yu F , Lysyannikov A V , Kuznetsov A V , Shram V G , Pavlov A I , Smirnov M Yu , Kuznetsova P A 
Published: November 2021

Abstract
The problem of creating effective structures that ensure mutual rotation of the rotor and stator of an electric generator. The wide practical application of counter-rotor wind-electric generators, which provide a significant increase in specific power, is hindered by the disadvantages and low reliability of existing systems for removing electric energy from the windings of a rotating counter-rotor, due to the dry friction mode. It is possible to increase the reliability of the contact removal of electrical energy from the counter rotor (rotating stator) by replacing solid brushes with liquid metal contact groups, which will lead to a certain increase in the resistivity of the contact group, compensated by the contact area of the liquid metal with the contact ring. It is most advisable to use liquid metal contact groups based on gallium, which will raise the permissible temperature limit of operation by about 2 times compared to the achieved level to 275 °C and, thereby, additionally raise the specific power of the electric generator.
Study of the operation features of CHP cooling tower in conditions of forced air supply
Authors: Medyakov A A , Sadovin D N , Ostashenkov A P , Bashmakova A N , Lastochkin D M 
Published: November 2021

Abstract
In our country, at thermal and nuclear power plants, tower cooling towers built in 1960-1975 are still in operation. At the same time, the construction of new facilities and the modernization of existing installations requires a high-quality mathematical study of technical solutions. As part of the work, it is proposed to simulate the operation of a tower cooling tower, subject to additional forced air supply. Using the equations of heat and material balance for the cooling tower, a mathematical model of the operation of the cooling tower was developed in Microsoft Excel. The modelling of the operation of the cooling tower in the design conditions of the city of Yoshkar-Ola, as well as when installing additional fans of various capacities, has been carried out.
Kinetic scheme of the synthesis of butadiene rubber on a modified lithium catalytic system taking into account its polycentricity
Authors: Garifullina E V , Bronskaya V V , Aminova G A , Manuyko G V , Kharitonova O S , Ignashina T V , Balzamov D S 
Published: November 2021

Abstract
A mathematical simulation of the synthesis of butadiene rubber in a batch reactor under the action of an organolithium catalytic system in the presence of a modifier and with the addition of toluene to a solvent is carried out. A kinetic scheme of the process is proposed and the velocity constants of the elementary stages are determined on the basis of the developed model.
Phospholipids from plant materials as a corrosion inhibitor in oil production
Authors: Lesik E I , Buryukin F A , Vaganov R A 
Published: November 2021

Abstract
The article presents the assessment results of carbon steel corrosion rate in 15% hydrochloric acid (aqueous solution) in the presence of phospholipids at 60 °C. The corrosion intensity was estimated from the rate of weight loss; the intensity of electrochemical corrosion was determined from the value of the corrosion current density. Phospholipids were isolated from vegetable oil waste. Surfactants of various operating principles were used as samples for comparison and enhancing the additives efficiency. It was found that the use of phospholipids under experimental conditions made it possible to provide protective properties up to 86.5% for phospholipids individually and up to 95% in a 50:50 mixture with a cationic surfactant.
On the use of products of the organic matter extraction from coal as a component of fuels
Authors: Kositsyna S S , Safin V A , Buryukin F A 
Published: November 2021

Abstract
Extraction of the coal organic mass under the influence of organic dissolvent is a method of conversing coal into liquid products. The need for the further development of this technology is associated with the need to search for alternative direct liquefaction and gasification technologies for obtaining alternative fuel products. The paper presents the analysis results of hydrocarbon fractions 112-400 °C, obtained by joint heat treatment of coal and catalytic cracking heavy gas oil according to some quality indicators of traditional fuels. In general, according to some indicators this product is close to boiler fuels. But aromatic hydrocarbons and olefins predominate in the extraction products if we take into account chemical structure. So, it requires their hydrogenation improving.
Analysis of subharmonic oscillations in multi-phase ferroresonance circuits using a mathematical model
Authors: Tovboyev A N , Mardonov D Sh , Mamatazimov A X , Samatova S S 
Published: November 2021

Abstract
The article about solution of system of nonlinear differential equations that are almost impossible to solve by analytical methods by constructing a mathematical model of nonlinear oscillations occurring in three-phase ferroresonance circuits. A system of nonlinear differential equations was formed by approximating the volt-ampere characteristics of a ferromagnetic element in a ferroresonance circuit. Mathematical models for solving technical problems characterizing subharmonic oscillation processes in three-phase ferroresonance circuits and systems using the finite-difference method are expressed in the form of differential equations without appropriate initial conditions. Amathematical model of a system of equations representing subharmonic oscillations in ferroresonance connections depending on the value of the selected parameters in the field of change of any variable is considered.
Conceptual models of information production cycles and optimal management of environmental pollution and health risks
Authors: Balter B M , Balter D B , Egorov V V , Romanova E Yu , Podzorova M I , Faminskaya M V 
Published: November 2021

Abstract
In this paper, variants of the theoretical formalism are presented, which allow one to quantify the information flows in the optimal control system. The fundamental role of feedback is substantiated: observation ↔ control: information circulation through the feedback loop, when the information embedded in the object through its control, at the next time step, returns to the controlling subject in the form of information contained in observations of the object.
The ability of natural gas to reduce soot content in diesel exhaust gases
Authors: Rossokhin A V , Vasiliev A O , Valiev A R , Gordeev A A , Kazakov Yu F , Alatyrev A S 
Published: November 2021

Abstract
In accordance with the priority directions of development of the motor transport complex of the RF, the use of NGV fuel in transport should expand and by 2035 reach 50% of the total number of trucks and buses in large cities. This is due to a number of factors. The paper presents the results of studies confirming the effectiveness of using natural gas to reduce soot emissions with exhaust gases. In particular, the dynamics of the formation and burnout of soot particles by the angle of rotation of the crankshaft at the working operating mode is considered.
Antifriction properties of ceramic materials under high-speed sliding process
Authors: Alisin V V 
Published: November 2021

Abstract
The issues of tribology of a composite cermet material under high-speed short-term dry sliding friction process are discussed in this article. The possibility of reducing the friction coefficient due to the processing of cermet with selenium vapor is substantiated. Model experiments were carried out on a laboratory friction machine according to the pin-on-disk test at sliding speeds up to 100 m/s. Experimental dependences of the coefficient of friction on speed, load and the effect of mechanical properties on friction and wear of a friction couple are analyzed. These studies were based on the assumption about the possibility of reducing the friction coefficient of cermet by processing in chalcogen vapor and restoring the antifriction properties of the resulting lubricating film with an increase in temperature from friction heating of friction surfaces. It is proposed to carry out processing in chalcogen vapors of thermal protection ceramic coatings of the housings of the axial machines gas path, in particular, in aircraft engines. This technological process in conditions of emergency contact of the housing with the blades of the rapidly rotating disk will reduce the risk of engine destruction with catastrophic consequences.
Methodology for estimating the resource of the friction vibration damper of a freight car trolley
Authors: Cherepov Oleg , Antropov Aleksandr , Karmatskiy Vitaliy , Arkhipov Andrey , Lapshin Vasiliy 
Published: November 2021

Abstract
The concept of digitalization of railway transport and the introduction of digital technologies provides for the creation of a “Digital Railway” based on a “Digital Twin”, including a “Digital Twin” of a car, which implements a number of information and organizational measures aimed at assessing the current technical condition of a real car during its operation; reducing the cost of the life cycle of the car; increasing the reliability of assemblies and parts (increasing the overhaul life); reduced maintenance costs; creation of a service maintenance system for freight cars throughout the life cycle. However, the wear of vibration damper parts is the most important parameter that determines the turnaround time, the volume of repairs and the dynamic qualities of the car, which requires more detailed and reliable scientific substantiation. The assessment of the wear of vibration damper parts (friction bar, friction wedge, bolster) is carried out in two ways - by direct examination of them in operation (in this case, wear is estimated by changing the linear dimensions, i.e., in mm over the service life) and according to the results of bench tests of models of vibration damper or testing samples on friction machines (in this case, wear is estimated by the mass of the worn-out material). The proposed method for predicting the wear of parts of frictional vibration dampers implements the Archard friction model, takes into account the variability of loads acting on the working surfaces, for which a method for determining the friction path under various driving conditions has been developed. The developed methodology makes it possible to evaluate their service interval at the design stage of the car’s running gears.