bluuebunny/crossref_metadata_2025 huggingface dataset:
Image enhancement with DAGNet-based artificial neural network
Authors: Veremeev D N , Obuhov P S , Kislov K V , Yaskevich O G
Published: May 2020

The article is devoted to an artificial neural network that increases image resolution. According to the meaning of the article, two parts can be distinguished. The first part of the article discusses the process of designing an artificial neural network using DAGNet technology, during which its main parameters and structure are described. The second part is devoted to assessing the quality of functioning of the developed artificial neural network. To evaluate the performance of ANNs a comparative analysis with the bicubic interpolation method was used.
Analysis of the temperature regime of basin geosystems of the Krasnoyarsk Territory using MODIS satellite images and ground-based data
Authors: Erunova M G , Yakubailik O E , Yakubaylik T V
Published: May 2020

With the availability of a highly sparse and even shrinking network of ground-based weather stations in recent years, satellite remote sensing is a worthy alternative to traditional methods of measuring temperature, which provides long-term homogeneous data series for the studied territories. This article addresses the problem of the applicability of MODIS satellite data for analyzing the temperature characteristics of the regions of the Krasnoyarsk Territory. The thermal regimes and effective heat sum of the territories using ground-based data from weather stations and satellite images have been compared. Statistical data on the temperature regime in the basin geosystems of the Krasnoyarsk Territory has been obtained.
Mapping retrieval method for academic publications in the field of aerospace technology safety
Authors: Serdechnyi A L , Goncharov A A , Ostapenko A G , Bataronov I L
Published: May 2020

The article presents result of the development and application of the Mapping retrieval method. The method is based on the construction, location in two-dimensional space and the analysis of the citation graph, which found in bibliographic databases. The method allows increase the speed and quality of the scientific research, as well as to review publications on a given topic. It is possible to identify the most authoritative co-authors communities in the field of topics of interest, as well as identify trends and predict the development of the topic. In addition, the Mapping retrieval method allows finding academic publications on related interdisciplinary research without known keywords that are needed for traditional text retrieval methods. The method is demonstrated by the example of constructing and analyzing the retrieval map in the field of safety of aerospace technologies, which made it possible to identify and track the development of thematic clusters. As a result of a mapping retrieval, a number of the most interesting academic publications were identified. Their brief review is presented in the article
A new algorithm of solving harmonic balance equations
Authors: Lantsov V N
Published: May 2020

The harmonic balance method is widely used for simulation of nonlinear radio circuits in electronic CAD systems. The main problems of algorithms and programs based on HB methods are significant requirements for computer memory and huge computational costs when simulate a complex circuits containing thousands of electronic components and hundreds of thousands of model equations. Methods of model order reduction have become popular in recent years and can significantly reduce the dimension and memory required for electronic circuit models for dynamic mode analysis. The main problems of low-order methods for simulation of electronic circuits are associated with very small reductions in computational costs (with a significant reduction in the dimension of the equations and the required memory for the model). A new method and algorithm of solving the equations of harmonic balance method used in electronic CAD systems is presented. The new algorithm is based on applying the ideas of model order reduction methods to harmonic balance equations. A new method replaces the vector (matrix) of equation unknowns by two matrices of small dimensions that are solved by iteratively (as into the standard harmonic balance method). The first system of equations reduces the number of harmonics in balance equations, and the second system of equations reduces the number of circuit nodes. These equations of small dimensions are solved sequentially, so this algorithm allows significantly reduce the size of computer memory for storing of model equations and reduce of computational costs. The simulation program was developed in the Matlab/Simulink system. The results of simulation test circuit with different number of electronic circuit nodes and the number of considered harmonics showed that the gain was obtained only for dimensions of problems more than one hundred (the number of nodes and the number of considered harmonics).
Internet of things networks predictive risk assessment method and security management
Authors: Bolgov A A , Ermakov S A , Parinova L V , Kostrova V N
Published: May 2020

The methodology of predictive security violation risk assessment based on the use of fuzzy logic is offered. Demonstrates one risk assessment methodology use for IoT-network in presence of data about protocols used in network wireless devices. Alternative methodology for risks predicting when at the initial stage experts estimate input parameters, with subsequent data processing using the hierarchical methodology based on fuzzy inference systems that can reduce the influence of subjective expert evaluations of the researched object is offered. Numerical estimates of risk, despite qualitative character of expert estimates of input parameters are received.
Indoor ultrasonic positioning system transceiver modules
Authors: Morohin D V
Published: May 2020

Positioning systems allow you to determine the position of an object. Global positioning systems use signals from satellites for this purpose, and local (indoor) positioning systems use a wide range of physical phenomena that can transmit signals. In particular, one of these phenomena is ultrasonic. The author of this article propose a solution in the form of devices for emitting and receiving an ultrasonic pulse with high sensitivity and a wide solid angle of reception/emission of ultrasonic, which can be successfully applied in an indoor positioning system.
The language of left brackets as a morphism of a maximum prefix code
Authors: Melnikov B F , Korabelshchikova S Yu , Dang V V
Published: May 2020

We investigate the solvability of the equivalence problem in various subclasses of the class of context-free languages. Another fundamental problem necessary for the material in this paper is also the special binary relation for a set of finite languages. Combining these two topics, we obtain in this paper the necessary and sufficient conditions for the equality of two bracketed languages for the prefix-and-suffix case.
Regional socio-economic parameters modeling and system analysis by means of programming and computing suite
Authors: Ketova К V , Rusyak I G , Saburova E A , Vavilova D D
Published: May 2020

This paper presents a programming and computing suite which comprises regional socio-economic parameters database (gross regional product, physical capital, human capital and their investment volume), an analytical subsystem which renders mathematical models of parameters’ analysis and forecasting, as well as visual representation unit of modeling and forecasting results. In view of the results, a system research report is built, providing information on socio-economic condition of the region. The calculations are performed by the example of the Udmurt Republic.
Spacecraft onboard computers control automation
Authors: Tabakov E V , Zinina A I , Kosinskiy M Yu
Published: May 2020

This paper concerns the task of onboard spacecraft’s computers functioning analysis problem. Existing approach is analyzed. Criteria of onboard computers normative functioning and source data for analysis implementation are defined. As a result, telemetry analysis algorithm for forming decisions about onboard computer normative functioning is offered. Program based on it is developed.
On the formation of membership functions for fuzzy sets in the logical representation of knowledge
Authors: Serov Vladimir V
Published: May 2020

The problems of using characteristic membership functions to describe fuzzy knowledge in the form of a logical calculus of fuzzy first-order predicates are considered. Some possible types of functions and methods for their preparation are described. The possibility of using these methods for the development of expert and intelligent systems in various subject areas, such as enterprise management, recognition of the structures of polyatomic molecules, is shown.
Protection of information presented as pseudo-probabilistic display in the information exchange channels of UMV
Authors: Moiseev D V , Mashenko E N , Nikishin V V , Lukina L I
Published: May 2020

The work considers the fundamental possibility of using a pseudo-probabilistic form of information representation for its protection when transmitting over open communication channels. Data transmission is becoming one of the priorities for ensuring sustainable, continuous, operational and stealthy management of unmanned vehicles. This is due to the wide use of automation, digital information, integration of various systems and means of control, management, etc. Data traffic with a large number of video images increases in an avalanche, and it is necessary to transmit information with guaranteed delivery and minimal delays.
Debugging method for spacecraft’s equipment based on ARM processors
Authors: Tabakov E V , Zinina A I , Kireev D S
Published: May 2020

This paper concerns the problem of onboard spacecraft control system equipment debugging in the part of providing correct operation of onboard software. The disadvantages of existing software tools for debugging are considered. The new method of interaction with ARM processor-based microcontrollers is proposed. This method is based on using OpenOCD and QT tools and allows to avoid considered disadvantages. The new software is designed based on this method. The main modes of its operation are described.
Reservoir computing using high order synchronization of coupled oscillators
Authors: Velichko A A , Ryabokon D V , Khanin S D , Sidorenko A V , Rikkiev A G
Published: May 2020

We propose a concept for reservoir computing on oscillators using the high-order synchronization effect. The reservoir output is presented in the form of oscillator synchronization metrics: fractional high-order synchronization value and synchronization efficiency, expressed as a percentage. Using two coupled relaxation oscillators built on VO2 switches, we created an oscillator reservoir that allows simulating the XOR operation. The reservoir can operate as with static input data (power currents, coupling forces), as with dynamic data in the form of spike sequences. Having a small number of oscillators and significant non-linearity, the reservoir expresses a wide range of dynamic states. The proposed computing concept can be implemented on oscillators of diverse nature.
Development of autonomous software solutions based on geometric cores to create digital assembly models of machine tools
Authors: Yurov A N , Chizhov M I , Vetokhin V V , Lavlinskiy V V
Published: May 2020

The article considers approaches and solutions aimed at improving the productivity of engineering departments, where CAD software solutions are actively used. In the manufacture of parts of machinery there is a need in the design of tooling. Elements of machine tools can be prepared and distributed in electronic libraries, which in an auto-mated mode will create a set of parametric models of the required tooling of machine equipment. The accuracy and quality of modelling will be achieved by eliminating the human factor from the design process. The development of such software solutions is implemented by means and components of the open geometric kernel Open Cascade, which has great potential in the field of modelling and scientific calculations.
Automatic generation of methodological materials in the study of technical and engineering texts in a foreign language
Authors: Bronov Sergej , Stepanova Elena
Published: May 2020

Masters, postgraduate students, engineers and scientists in Russia should study new areas of knowledge in a foreign language, for example, in English. But they have a double task arises: 1) learning English for a specific professional field; 2) studying the professional field using the acquired knowledge of the English language. The main requirement here is the minimum time for training. The purpose of the training process under consideration is to develop knowledge and skills for reading texts in a specific area of knowledge. At this stage the problem of active English language proficiency, i. e. writing your own articles or speaking is not considered. The student does not have the similar material in Russian. The material studied contains new concepts that are not known to the student. In standard university textbooks simple material is used that is already known to the student in Russian. Therefore, the student can understand the meaning of the content which significantly simplifies the learning process. But in this case the situation is different. Automation of training material’ design within the framework of the situation is carried out in two stages: the analysis of the studied materials and the synthesis of training materials. At this stage the existing software such as Microsoft Word and Excel together with Visual Basic for Application (VBA) can be used. The corresponding algorithms are applied for each operation. The automated development of training materials’ proposed technology for mastering a foreign language in a narrowly specialized field of knowledge enables to increase the effectiveness of subsequent training in a foreign language.
Self-configuring genetic programming algorithm for solving symbolic regression problems
Authors: Karaseva T S , Mitrofanov S A
Published: May 2020

In most cases, the only way to study and solve practical problems is to investigate them with the help of models. However, this method is also to be a complicated problem where a significant part of the effort is aimed at finding the functional dependencies between input and output variables. But a great number of methods of numerical identification solve problems by developing a model that, in fact, is a black box. The reduction different types of problems to the problem of symbolic regression allow us to overcome the lack of these methods. The algorithm of genetic programming is applied for solving the problems of symbolic regression. The given paper considers an algorithmic complex that includes a genetic algorithm and an algorithm for genetic programming for solving symbolic regression problems. The uniform crossover operator is applied for these methods; it ensures the flexibility of the algorithm due to the greater diversity of structures resulting from crossover. The opportunity for selection two or more parents for recombination is realized. To automate the selection of the algorithms parameters a self-configuring procedure at the population level is realized and the efficiency of its application is proved for test problems of symbolic regression. The practical implementation of algorithms for solving classification problems and differential equations is carried out.
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

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

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

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

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.
Analysis of self-starting of own needs of heat power plants
Authors: Egonsky Alexander A , Kovalenko Igor V
Published: May 2020

This article presents the results of the analysis of self-start of asynchronous engines of the existing power plant, it`s based on the research conducted at the Department of Power Plants and Electric Power Systems of Siberian Federal University.
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

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

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

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

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

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

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

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

The 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

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

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

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

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

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

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

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

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

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

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

The 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

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.
Effect of methanol use in the engine on the workflow
Authors: Anfilatov A A , Chuvashev A N
Published: May 2020

In the Vyatka GSHA for a number of years, research has been conducted on the conversion of internal combustion engines to work on methanol. The purpose of our research is to improve the efficiency and environmental friendliness of the 2CH 10.5/12.0 diesel engine when working on methanol using a dual-fuel feed system (DST) and the use of a multi-jet nozzle for feeding a portion of diesel fuel (DT) by improving the mixing, combustion and heat generation processes. The implementation of a method for using methanol by feeding it directly into the combustion chamber and igniting it from the igniting part of the DT provided for the installation of two fuel systems, including two high-pressure fuel pumps of type 2UTNM and two injectors for each cylinder. At the same time, an additional hole was drilled in the head, located in the same vertical plane as the standard nozzle, to install the nozzle that feeds the DT.
Risk-based approach for industrial environmental control during the construction of the main gas pipeline
Authors: Glebova E V , Artanova M V , Ivanova M V , Korobov A V
Published: May 2020

Based on the analysis of acts of industrial environmental control and the content of the Register of Environmental Violations of the General Contractor, the distribution of categories of documentary and natural violations by frequency of occurrence was revealed. Based on the analysis of the legislation of the Russian Federation, the severity of potential environmental consequences, translated into point values, is determined. On the results of the established parameters, the final score is calculated. It is proposed to supplement the Company Register with this parameter.
The formation of soot on the walls of the diesel combustion chamber and its effect on heat transfer in the cylinder
Authors: Devetyarov R R
Published: May 2020

The presence of soot particles in the volume of the combustion chamber significantly increases the radiation of the flame and leads to an increase in local temperatures in the volume of the KS. Therefore, the presence of soot particles has a strong effect on the dynamics of heat generation in a diesel cylinder, especially at high load conditions. And an understanding of the mechanisms of its formation allows you to choose a way to reduce the soot content in the exhaust gas.
Numbrigal simulation of a thermodynamic process to decompose gas hydrate in a gas production well using, radiofrequency electromagnetic radiation
Authors: Fatykhov M A , Akchurina V A , Stolpovsky M V
Published: May 2020

The formation of gas hydrate deposits on the inner surface of gas production equipment is a frequently occurring type of complication in gas production, leading to a significant decrease in the useful section of pipes and gas pipelines. The intensity of their formation can lead to a complete overlap of the lifting pipes and annular channels in the annulus in certain areas, which necessitates repair work to clean the wells of gas hydrates. Based on the analysis of methods for cleaning wells from gas hydrate deposits, it was revealed that in some cases one of the effective methods of preventing their formation and combating them is to use the energy of high-frequency and superhigh frequency electromagnetic fields. The article explores the processes of heating and decomposition of gas hydrate deposits in the wellbore. About 30% of the thermal energy released in the wellbore interacting with the electromagnetic field is consumed to heat the medium surrounding the well. The need for timely removal of the gas-water mixture formed in the annulus for the decomposition of gas hydrate along the entire length of the well is established.
Effect of electromagnetic field on water-in-oil emulsion and calcium carbonate crystallization
Authors: Alimbekova S R , Dokichev V A
Published: May 2020

The investigation was devoted to the effect of electromagnetic field on crystallization of calcium carbonate, structure of CaCO3 crystals generated from oversaturated aqueous solutions, and water-in-oil emulsion (crude oil) properties. XRD demonstrated that electromagnetic field caused a decrease in mean size of CaCO3 particles by 30 μm and prevalent aragonite formation. We detected that electromagnetic field application leads to decreased apparent viscosity of water-in-oil emulsion and inhibits influence of a non-ionogenic surfactant on stability and viscosity properties of crude oil. As a matter of practice, the method demonstrated its efficiency to prevent scale deposits in oil production wells.
Increasing the uniformity of distribution of the oscillations of the disc ultrasound radiators for gas media
Authors: Khmelev V N , Nesterov V A , Shalunov A V
Published: May 2020

The article is dedicated to the research of the influence made by secondary modes of oscillations on the uniformity of distribution of the oscillations produced by the ultrasound disk radiators. The article considers the reasons for emergence of the secondary oscillation modes and the ways of mitigating the influence of the secondary modes on the final distribution of the oscillations of the ultrasound disc radiator. It is pointed out that the difference between the working mode frequency and the secondary flexural mode should be 500 Hz or above, and the minimum difference between the working mode and the secondary radial mode frequencies should be 2 kHz. The article also presents the results of the studies of the disc radiators with anisotropic mechanical properties. It suggests a method for modernization of the disc radiators featuring anisotropic mechanical properties in various ways.
Influence of main chain transmitters and cross-growth reaction on characteristics of SDRC rubber
Authors: Bronskaya V V , Aminova G A , Manuyko G V , Ignashina T V , Bashkirov D V , Kharitonova O S , Balzamov D S
Published: May 2020

The study and modeling of the SDRC rubber synthesis process under the conditions of chain transmission and cross reactions are carried out. The influence of the main chain transmitters and the cross reaction on the characteristics of the resulting product is studied.
The mutual influence of electromagnetic and mechanical processes in dynamic modes of inertial vibrating electric drives
Authors: Mirsadov M M , Fayzullayev B KH , Abdullabekov I A , Kupriyanova A S , Kurbanbayeva D I , Boqijonov U A
Published: May 2020

To conduct studies on the mutual influence of electromagnetic and mechanical transient processes of starting inertial vibration drives with an asynchronous motor (IVD-AD), a mathematical model is developed in this work. For this, the analytical dependence of the dynamic mechanical characteristics of the vibrator is determined for various values of the acceleration of the rotor, significantly different from the standard moments of resistance. In the mathematical model, the dynamic mechanical characteristic of an induction motor is used as a torque. Studies on a mathematical model showed that one of the disturbing effects on the dynamic mode of the IVD-AD is a change in the load parameters during operation, another disturbance is a change in the acceleration of the rotor, which leads to a shift in the resonance curves, which must be taken into account when choosing methods and means of tuning control in resonance.
Investigation of corona-resistant coatings for the dielectric surface in a plasma-chemical ozone generator on the base of dielectric barrier discharge
Authors: Andreev V V , Kravchenko G A , Pichugin Yu P
Published: May 2020

The results of the study on the development of corona-resistant coatings for dielectric barriers in plasma-chemical ozone generators on the base of dielectric barrier discharge are presented. The influence of the binder and filler material on the service life of the dielectric barrier is studied. The best corona resistance result was achieved using an organosilicon binder. Inorganic fillers are effective for increasing the corona resistance of the coating: Al2O3 powders, talc and others. The studies were performed in air at atmospheric pressure.