bluuebunny/crossref_metadata_2025_split huggingface dataset:
Method for assessing the diagnosis of the technical condition of an integrated microprocessor pulse generator of railway automation and telemechanics
Authors: Azizov Asadulla R , Shakirova Feruza F 
Published: May 2020

Abstract
The article discusses the question why we need an integrated microprocessor pulse generator and deals with the issue of determining the diagnosis of the technical condition of an integrated microprocessor pulse generator for automation and telemechanic systems in railway transport. The theoretical models of the operational failure rate for implementing a microelectronic unit are given in particular detail. All calculations that are given in the article for railway automation telemechanic’s code track transmitter plug mode.
Optimization of planned solutions based on network models for large-scale problems
Authors: Kondrashov Yu N , Ermakov A A 
Published: May 2020

Abstract
This article covers the development of the project planning algorithm based on network models for solving large-scale problems. The planning algorithm which brings the problem of plan optimization based on a network model down to a general problem of non-linear programming with the possibility of flexible formation of the goal function and constraints is completed by the iterative aggregation method for problems of non-linear programming which allows increasing the efficiency of solving large-scale problems.
Statistics on the use of mathematical modeling as a research tool
Authors: Galkina A I , Grishan I A 
Published: May 2020

Abstract
This article is devoted to mathematical modeling as a research tool. The article is based on statistics of the joint Fund of electronic resources “Science and education” for the period from 1998 to the present. The selection of information about developments in mathematical modeling and statistical processing is carried out automatically by the collector_stat program developed by the authors of the article. The reconstruction of the higher school, which started in 2013 and is one of the active participants in the development of science in the country, is the object of research by Ofernio. The subject of research is electronic and information developments on the topic of mathematical modeling. Methods of research are methods of statistics, expertise, content analysis.
Stress-strain state and structure of pure copper and Grade 4 titanium after free bending
Authors: Aksenov D A , Asfandiyarov R N , Raab G I , Raab A G , Janeček M 
Published: May 2020

Abstract
This paper investigates the stress-strain state and the features of structural transformation in materials with different types of crystalline lattices in the process of deformation by free bending of axis-symmetrical billets. As the materials for the study, we selected oxygen-free M00B Cu and Grade 4 CP Ti. Using mathematical modeling, we study the stress-strain state of the samples from the selected materials in the process of bending via different routes. We study the structure in the mesoscale and determine the features of structural transformation. It is found that in the process of bending of Cu, a refined surface layer with a thickness of 20-30 μm and a cell size of ≈1 μm forms already after 1 processing cycle. In the process of bending of Ti, twinning occurs in peripheral regions, and the efficiency of twinning via route C is higher than that via route A. The most efficient, in terms of strengthening, processing routes of bending are determined.
Mathematical model and numerical algorithm for studying suspension filtration in a porous medium considering the processes of colmatation and suffusion
Authors: Ravshanov N , Saidov U , Karshiev D , Bolnokin V E 
Published: May 2020

Abstract
Solution of an urgent problem related to technological process of filtering and dehydration of liquid solutions from fine particles and undesirable ionic compounds is discussed in the paper. There was developed a mathematical model and numerical algorithm taking into account the key factors and parameters that significantly affect considered processes. The problems related to the determination of the key parameters and their variation ranges are solved in the paper. Based on the analysis of conducted numerical experiments, the conclusions are formulated that serve as the basis for making appropriate management decisions.
Thermal calculation of the radiation chamber of an ethane pyrolysis furnace
Authors: Vafin D B , Sadykov A V 
Published: May 2020

Abstract
Using our own application package that implements the differential method of thermal calculation of furnaces, we calculated the temperature fields in the radiation chamber and the distribution of heat fluxes along the tubular reactors in a ethane pyrolysis furnace. The interconnected combustion processes of fuel gas, the turbulent flow of combustion products, radiant-convective heat transfer are described by two-dimensional equations of transport and motion. Wall burners are installed in eight horizontal rows on both walls of the radiation chamber. The combustion products of fuel gas in the air leaving the nozzles 128 of the burner create complex fields of flow velocities and temperatures in the radiation chamber of the furnace. Heat fluxes to the reaction pipes are formed due to the radiations of flue gases, soot particles and hot lined surfaces of the walls of the combustion chamber.
Assessment of the industrial load impact on the ambient air state
Authors: Sheveleva Oksana B , Slesarenko Ekaterina V , Vagina Nina D , Mishchenko Vladimir V 
Published: May 2020

Abstract
The importance of monitoring the ambient air state by business entities and the state is due to the fact that air acts as a vital component of the environment, an adverse change of which can adversely affect changes in climatic conditions, increase environmental stress, and reduce quality of life of the population. Information and analytical programs for environmental monitoring of enterprises allow accelerating the adoption of environmentally-friendly decisions, and an assessment of the industrial load impact on the quality of air makes it possible to identify factors contributing to the deterioration of the environmental situation on a global and national scale. Due to the fact that the main pollutants of air by harmful substances and greenhouse gases in the Russian Federation are oil and gas, coal, metallurgical and energy industries, one of the ways to reduce the environmental burden in commodity-dependent regions is the need to diversify production, as well as increase environmental responsibility of owners and management of industrial enterprises.
Application of the information uncertainty measure when comparing planned and actual commercial losses of electricity
Authors: Dulesova N V , Dulesov A S , Karandeev D J , Malykhina A V 
Published: May 2020

Abstract
The paper considers methods for processing data on commercial losses in electric networks with subsequent analysis of the obtained results. The information processing tools included methods for determining the amount of divergence of electric power losses when comparing planned and actual data. Comparing the planned and actual values of electric power losses, a method is proposed that in the classical theory of information is called “Kullback-Leibler divergence”. The rationale for its use is based on the possibility of applying a measure of information uncertainty, where information entropy is taken as a measured value. Comparing the planned and actual values of electric power losses, discrepancies between these distributions are obtained based on the application of the Kullback-Leibler model. The obtained results not only confirmed the importance of the applicability of this method of information processing, but also allowed us to draw attention to the adequacy of the planned losses to the actual ones.
Simulation method of the low-Re flows in the packed bed technological equipment
Authors: Khomyakov A P , Mordanov S V , Lavrov A S , Grinyov D I 
Published: May 2020

Abstract
The paper shows the semiempirical method of a numerical simulation of the low-Re flows in the packed bed technological apparatus. The proposed method is based on the Navier-Stokes equations modification by the linear momentum sources equations in the packed bed zones. It is found that the simulation error of the proposed method is not more than 6.2% for low-density finite element meshes. The average value of the simulation error is about 3.0% for all shown cases. It was found that the proposed method simulation error almost independents on the mesh density. In the main, the simulation error is determined by the linear momentum sources equations approximation error.
Investigation of a small river ecosystem to calculate the risk of quantitative and qualitative depletion of watercourse
Authors: Nafikova E V , Ismagilov A A , Alexandrov D V 
Published: May 2020

Abstract
Economic development of catchment areas, where the flow of large and small rivers forms, leads to irreversible environmental changes and the disappearance of small rivers. Flowing through the areas of residential and industrial development of cities, towns and other settlements, they are exposed to the most intense anthropogenic pollution, resulting in a sharp deterioration of water quality and depletion of water resources. The aim of this study is to test the methodology of integrated assessment of watercourse pollution according to hydrochemical indicators. When calculating the risk of quantitative depletion of water resources it is necessary to take into account the peculiarities of territory use: arable land, woodiness, artificially created areas, etc. The method has been tested in alignments of small rivers of the Republic of Bashkortostan (Russia). At a complex estimation quantitative and qualitative risks of the small river depletion for the long-term period have been defined. The hydrological scheme of zoning on size of geoecological risk of qualitative and quantitative depletion of water resources of studied alignments of small rivers, in a zone of influence of the mining and processing enterprise is drawn up.
Electrodeposition of zinc plating from zincate electrolyte using galvanostatic mode of pulse electrolysis
Authors: Kireev S Yu , Yangurazova A Z , Kireeva S N 
Published: May 2020

Abstract
The process of electrodeposition of zinc plating in the galvanostatic mode of pulse electrolysis is studied. Having analyzed periodical and reference literature, we selected zincate electrolyte containing ECOMET C1 brightening additive as the research object. Based on the analysis of experimental data, we have revealed dependences of cathode current efficiency of zinc and the deposition rate of coatings on the values of current density in pulse, frequency and duty cycle of a pulse current, temperature, and the concentration of sodium hydroxide and zinc ions in solution. Using the galvanostatic mode of pulse electrolysis made it possible to increase the current density by 25%, and to reduce the concentration of brightening additives with a constant coating quality, in comparison with the stationary mode. Based on the conducted research, the modes of forming high-quality zinc plating at a speed of up to 40 μm/h are recommended.
Investigation of the ignition delay period in the diesel combustion chamber when working on an alcohol-fuel emulsion
Authors: Likhanov V A , Lopatin O P 
Published: May 2020

AbstractThe ignition of the fuel compression in the cylinder of a diesel engine is a complex and multistage character. The addition of alcohol has no significant effect on the ignition delay period and only leads to a slight change in its value. At the same time, if we assume that the evaporated alcohol is evenly distributed throughout the air charge, then the question remains about the amount of alcohol that burns in the first phase of combustion and determines the value of dynamic indicators. In the paper we propose a scheme of the evaporation and combustion of drops of the alcohol-fuel emulsion.
Multi-motor drive with common inverter for pumping unites
Authors: Khamudkhanov M M , Sapaev Kh B , Umarov Sh B 
Published: May 2020

Abstract
This paper presents the results of a research of a multi-motor drive with the electric coupling and a common grid-controlled inverter for pumping facilities of pumping irrigation systems. This system is the most preferable in compliance with the requirements for a controlled electric drive of water-lifting pumping facilities, in which a group of water-pumping sets works in parallel in a common hydraulic pressure circuit. In addition, this electric drive system can be used in multi-motor electric drives of the general purpose industrial grades that do not require absolutely strict coordination of the rotational speeds of their drive of the wound-rotor induction motor, depending on the requirements of the process conditions. In addition, a clear advantage of this system is that it is characterized by a high efficiency compared to other known systems of controlled electric drive, since it only converts the slip energy of the drive motors.
Three-dimensional thermal calculations of the radiation chamber of a cylindrical heating tube furnace
Authors: Sadykov A V , Vafin D B 
Published: May 2020

Abstract
The paper briefly describes the method of thermal calculations of radiation chambers of tube furnaces on the basis of modelling interconnected processes taking place in the furnace by three-dimensional differential energy equations, the transfer of momentum components, mass concentrations of methane and air, continuity, a two-parameter model of turbulence and the equation of energy transfer by radiation. A software package using this method is applied to carry out numerical analysis of the spatial temperature distribution, the averaged values of velocities of the combustion products turbulent flow in the combustion chamber of a cylindrical heating tube furnace of the oil-processing industry. A furnace diagram with diffusion burners on the radiation chamber floor and differential equations describing physical processes taking place in the furnace are given. Methods for solution of the initial equations are described. The obtained distributions of the surface densities of heat fluxes to the coils along the chamber perimeter at different heights of the furnace are demonstrated. Graphs of the temperature change of the combustion products and the tubular reactor walls for different values of the angular coordinate are given.
Analysis of autoparametric oscillations in three-phase electro-ferromagnetic circuits
Authors: Tovboev A , Ibodulaev M , Baranova M , Grishina I 
Published: May 2020

Abstract
The paper presents mathematical models for the analysis of autoparametric oscillations at the frequency of subharmonic oscillations in three-phase electro-ferromagnetic circuits, which are developed taking into account the main factors and conditions for obtaining subharmonic oscillations in which the process under consideration occurs. With an increase in the degree of adequacy of the mathematical model, its form and algorithmization of problems on PC become more complicated.
Study of the relation between the modes of contour anti-erosion tillage of slope agricultural landscapes and the spatial location of the machine-tractor aggregate
Authors: Vasilyev S A , Zatylkov N I , Rechnov A V , Portnov M S , Vasiliev A A 
Published: May 2020

Abstract
The article deals with the study of the relation between the modes of contour anti-erosion tillage of slope agricultural landscapes and the spatial location of the machine-tractor aggregate. Within anti-erosion technologies for the cultivation of agricultural crops on limited areas of slope lands cut by ravines we propose an original approach to contour tillage with the use of active working parts. The main conditions determining the angles set when tilling the underlying surface by a tractor that are necessary to control active working parts of agricultural machines are considered. It is noted that contour tillage with a zero deviation of technological furrows does not require additional agro-technical and hydro-technical anti-erosion melioration measures.

A post-publication change was made to this article on 9 Jun 2020 to correct an author name.
Increasing efficiency of technological steam consumption at oil and gas enterprise
Authors: Balzamov D S , Balzamova E Yu , Bronskaya V V , Oykina G I , Kharitonova O S , Shaikhetdinova R S , Khairullina L E 
Published: May 2020

Abstract
One of the most common energy carriers in the petrochemical industry is water vapor, which is mainly used as a heating medium in process plants. The effective functioning of steam supply, condensate collection and return systems is one of the criteria that affect the cost of production. Improper organization of the steam supply system leads to overuse of heating steam, uneven operation of the steam system and emergency situations. This paper analyzes possible problems in steam supply systems in the absence or incorrect operation of steam traps. The specific indicators of the object of study, circuit solutions and the economic efficiency of the use of steam traps are calculated.
Obtaining medium molecular characteristics of cation copolymerization of isobutylene and isoprene
Authors: Dmitricheva R R , Antonova I O , Manuyko G V , Aminova G A , Bronskaya V V , Shaikhetdinova R S , Balzamov D S , Kharitonova O S 
Published: May 2020

Abstract
Synthetic rubber has been interesting since the first days of research. Commercial isobutylene polymers are homopolymers and copolymers containing a small amount of isoprene. Isoprene has the great technical importance in connection with the production of synthetic rubbers that are close in structure and properties to natural rubber. These days, chlorinated and brominated butyl rubber derivatives have the highest sales volume. Butyl rubber is one of the synthetic rubber which is produced in quite large quantities on the world market. Commercial butyl rubber that is a copolymer of isobutylene and ˜1.5 %mol isoprene, is produced by carbocationic methods. There is a mathematical model of periodic isothermal process of copolymerization of isobutylene and isoprene using AlCl3 catalyst in the solution of CH3Cl in a periodic reactor consisting of four reactions, that are chain growth, two chain transfer reactions to solvent and reinitiation, in this article Nowadays, the cation polymerization for the synthesis of new materials of commercial interest rapidly develop and have the widespread use. One of such materials is butyl rubber, which is produced at -98°C in an inert methylchloride diluent in the presence of the AlCl3 initiator.
Calculation of the soot content in the diesel cylinder with turbocharge 4CHN 11,0/12,5 when working on natural gas
Authors: Likhanov V A , Rossokhin A V 
Published: May 2020

Abstract
The article considers ways to reduce the soot content in the exhaust gases of motor-tractor diesels (smoke) by using an alternative fuel-compressed natural gas. The influence of gas engine fuel on the parameters of the combustion process and soot content in the cylinder and in the exhaust gases of a high-speed diesel D-245.12C with a dimension of 4CHN 11,0/12,5 (turbocharged, liquid-cooled) is considered. The results of experimental and theoretical studies are presented, which allow us to draw a conclusion about the efficiency and feasibility of using this fuel to reduce the smoke content of exhaust gases.
Controls of the modes of operation of the pumping station with application of frequency-controlled electric drive
Authors: Khamudkhanov M M , Abdullabekov I A , Khamudkhanova N B , Dusmatov R K , Fayzullayev B KH 
Published: May 2020

Abstract
The article describes the developed system of automatic control of technological process of water supply of a pumping station, providing mainly for potable, technical and circulating water supply stable maintaining constant the required pressure in their main delivery pipe when the probabilistic nature of water consumption through a smooth frequency start and further regulation of productivity and pressure develop any of the parallel pump units on the steps for power regulation.
Investigation of automatic electric drives balancing transformers with lead control angles
Authors: Sidorenko E V , Kozhin A S , Danilov A D , Burkovsky V L , Gusev K Yu 
Published: May 2020

Abstract
Analysis were carried out of power rectifiers’ commutation in balancing transformers at lead control angles, positive effect of shielding angle against surge voltage on the equipment main performance indicators was established, equations and experimental characteristics of this component operation were provided. As a result of theoretical and experimental investigations of the surge protection device operation, a significant positive effect on the quality of switching power rectifiers in the balancing transformer in case of lead control angles was detected. The relationship between the degree of reduction of overvoltage in the input phase voltage of the converter and the capacitance values of the capacitor, the angle of the first switching stage and the lead control angle of the converter were determined. A further study of the unit operation is to establish practically applicable quantitative relations between the specified values.
Engineering solutions in the field of digital transformation of the electric power industry
Authors: Gibadullin A A , Ryabinina E V , Morkovkin D E , Sodikov K A , Trifonov P V , Kirpicheva M A , Kokurina A D 
Published: May 2020

Abstract
In the framework of this study, engineering solutions in the field of digital transformation of the electric power industry are analyzed. In the work, the main advantages of the introduction of digital technologies in the electric power complex were identified. The study presents measures that will allow the full transition of the electric power industry to digital solutions in the field of ensuring the reliability, stability and security of the energy sector. At the end of the work, the simplest typical architecture of digital control of the electric power complex was presented.
Regulating characteristics of a diesel engine working on natural gas
Authors: Grebnev A V , Likhanov V A , Skryabin M L , Kochurova O M 
Published: May 2020

AbstractThe article presents regulating characteristics of a diesel engine according to the fuel injection advance angle during the work of engine on a gas-diesel process. Currently, for many manufacturers the task of reducing production costs is a key priority. In agriculture the essential expenditure item is made up of costs for mobile power facilities fuel. One way to decrease these costs is to use alternative, cheaper fuels. Natural gas is one of them. Diesel is the most common type of engine in agriculture. Though a lot of research on converting diesel engines to natural gas have been carried out, the problem of transition of high performance diesel engines of low dimension to natural gas is still understudied. Diesel D-245.7 (4CHN11/12.5) was taken as the object for the research. The aim of study is converting diesel to a gas-diesel process. Carrying out bench tests with recording regulating characteristics according to the fuel injection advance angle was one of the research stages. As the result of the bench tests there have been established the parameters of the combustion process, heat release characteristics, and effective indicators at different fuel injection advance angles when working on diesel and gas-diesel process.
Annual temperature variation reliably identifies different sites in a large water basin
Authors: Erunova M G , Yakubailik O E , Sadovsky M G 
Published: May 2020

Abstract
Spatial database of morphometric features based on basin approach is developed for Krasnoyarsk region. The water basins are ranged into four levels. The digital model of hydrography network developed by VSEGEI was used, in combination to Whitebox GAT, QGIS and ArcGIS software. The average climate features are calculated due to this digital model, and spatial analysis supported with advanced non-linear statistics is provided.