bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of parametric standardization in the calculation of rows of hydraulic cylinder diameters
Authors: Temasova G N , Leonov O A , Shkaruba N Zh , Vergazova Yu G , Golinitskiy P V 
Published: November 2021

Abstract
Currently, the ordering of standardization objects and their properties, optimization of the parameters of standardization objects, normalization of requirements for objects are the most important areas of standardization as a science. In this regard, the issues of choosing parametric series are very relevant. In order to increase the level of interchangeability and reduce the range of products and standard sizes of blanks, overall cutting tools, tooling, productivity, speed, speed, power, etc., used in a particular industry, as well as to create conditions for effective specialization and cooperation of plants, reduce the cost of products, the principle of preference is used in the unification and development of standards. There are two methods for choosing parametric series: the method of technical justification and the method of economic justification. The technical method is easier to use and is used to expand the technologies of unification of standard sizes of parts of homogeneous products. This method was used to calculate a number of diameters of hydraulic cylinders of broaching machines of the same series based on the mathematical dependence between the force developed on the hydraulic cylinder rod, which is formed by the initial parametric series laid down by the designers. As a result of technical optimization of the choice of the parametric series, a number of diameters of hydraulic cylinders R20/2(45-224) mm was installed, fully corresponding to the main functional parameter - a number of forces on the rod of broaching machines R10/2(0.63-16.0) kN.
Ensuring fire safety during the operation of oil and gas equipment based on the results of compact specimens tests
Authors: Samigullin G Kh , Samigullina L G 
Published: November 2021

Abstract
The paper considers the application of the test method of compact specimens to assess the degree of damage of steel elements of oil and gas equipment. According to experimental data, an analytical dependence was obtained linking the degree of damage to the index of the specific fracture work, intended to assess the possibility of safe operation of explosive and fire-hazardous equipment.
Purification of thermal power plant emissions from carbon dioxide by the liquefaction method as part of a turboexpander unit
Authors: Egorov A V , Kaizer Yu F , Lysyannikov A V , Kuznetsov A V , Bezborodov Yu N , Shram V G , Kuzmin N V , Tyukanov V L 
Published: November 2021

Abstract
The purpose of this work is to estimate the energy costs for the utilization of carbon dioxide generated by thermal power plants operating on various types of fuel by the liquefaction method as part of a turbo-expander installation, as well as a general assessment of the efficiency of the TPP during the utilization of carbon dioxide. The energy costs for the liquefaction of carbon dioxide in the turbo-expander unit from the combustion products of thermal power plants running on coal, natural gas and heating oil differ slightly and amount to about 5 MJ/kg of fuel burned. The practical application of purification of combustion products of thermal power plants from carbon dioxide by the liquefaction method as part of a turboexpander installation is possible as part of combined-cycle power plants with a simultaneous reduction in electrical efficiency by more than 10 % to a level of less than 50 %.
Optimal control of fluctuations of the “liquid substance - pipeline” system in terms of speed during transportation of a liquid substance
Authors: Sergeev S M , Provotorova E N , Lebedeva Y O , Borisoglebskaya L N , Kravets Ja 
Published: November 2021

Abstract
The process of transporting a liquid substance (oil, petroleum products, gas mixtures) the pipeline network and related engineering facilities, being a dynamically non-equilibrium physical system, are often carried out in extreme modes, which can form dangerous wave phenomena accompanied by various instabilities, generating undesirable consequences and even catastrophes. Similar phenomena can occur in technical devices and apparatuses containing in their design hydraulic networks for the transfer of continuous media (aircraft, energy objects). Eliminate (extinguish or reduce the intensity) such phenomena are possible in the shortest possible time by making additional structural changes to the pipeline network, which make it possible to use external devices for dynamic influence on the “liquid substance – pipeline” system and eliminate (or minimize) the possibility of negative wave effects. The paper is devoted to the problem of eliminating dangerous vibrations initiated by a liquid substance transported through a pipeline network, provided that time resources are spent minimally. A mathematical model of the wave process and the problem of optimal control over the speed of such a model are considered. The control effect on the “liquid substance-pipeline” system is carried out at the initial and final points of the pipeline network, while the necessary information about the state of the system is used in a finite number of points distributed along the entire length of the pipeline, which makes it possible to calculate external influences on the system. In order to simplify the presentation of the results, a linear carrier of a liquid substance is used (in applications, a pipeline without branches) and a one-dimensional wave equation – the length of the pipeline is much larger than its diameter.
Engineering of renewable fuels in the energy complex of the region
Authors: Nefedov D G , Ketova K V , Rusyak I G 
Published: November 2021

Abstract
The article discusses the solution to the problem of the integrated use of renewable fuels in order to minimize ecological damage to the environment. A mathematical model has been developed that operates with averaged values of stocks of raw materials and fuel requirements. It allows you to determine the optimal number of enterprises for the production of each type of fuel, while obtaining the final formulas characterizing the schemes for the optimal location of production, as well as the relationship between these indicators. Applied calculations were carried out on the example of the Udmurt Republic.
Optimal control of pulse compensators of oscillatory phenomena in a network oil and gas pipeline system
Authors: Tkachova S A , Maltsev A S , Fedotov A A , Gunkina A S , Kravets O Ja 
Published: November 2021

Abstract
Within the framework of oil and gas engineering, the problem of optimal control of pulse compensators that counteract harmful oscillatory phenomena in a continuous medium during transportation via network gas-hydraulic carriers is considered. Powerful compressor units that create high pressure in the carrier of a continuous medium, to a large extent contribute to the formation of undesirable oscillatory phenomena (pulsations) that occur at the output of these compressors. These ripples are transmitted to the network carrier environment, which significantly reduces the efficiency of compressor units and even causes accidents in the networks of gas and hydraulic carriers. The latter means that the software engineering of the oil and gas industry should include research in the direction of improving the reliability of operation of compressor units and gas-hydraulic carriers. In the presented study, the mathematical description of the oscillatory process of a continuous medium is carried out by formalisms of a differential-difference system of hyperbolic equations with distributed parameters on a graph. At the same time, the mathematical model contains a fairly accurate mathematical description of controlled pulse compensators. The problem of controlling pulse compensators of an oscillatory process is considered as the problem of a point control action on a controlled differential-difference system at the places where continuous medium vibration dampers are connected to a network carrier. This is a characteristic feature of the presented study, which is quite often used in practice when engineering the processes of transporting various kinds of continuous media through network oil and gas carriers. The study essentially uses the conjugate state and the conjugate system for a differential-difference system - the relations determining the optimal point control are obtained. The results of the work are applicable in the framework of oil and gas engineering to the study of issues of stabilization and parametric optimization.
Automated complex of intelligent monitoring of a solar power plant
Authors: Kuznetsov P N , Kotelnikov D Y 
Published: November 2021

Abstract
A solution for automated monitoring and diagnostics of photovoltaic modules of industrial solar power plants is proposed. The solution is based on the use of an unmanned aerial vehicle with a specialized payload and a ground-based intelligent information and control system to detect problem areas of the station, in particular partial shading and pollution. To perform the detection procedures, a neural network based on the Fast R-CNN architecture with the learning algorithm – Inception v2 (COCO) was used. The results of preliminary tests showed that the accuracy of detecting problem areas is at least 92%. The article presents a mathematical model that allows calculating the installed power monitored by the complex, depending on the type of station and UAV, meteorological parameters, and the performance of computing equipment. Numerical calculations have shown that when using the FIMI X8SE UAV and a computing device based on the RTX2080 GPU, the installed monitored power will be up to 7.5 MW.
Study of hydraulic resistance of tangential swirlers
Authors: Voinov N A , Zemtsov D A , Bogatkova A V , Deryagina N V 
Published: November 2021

Abstract
This article presents the results of experimental research and simulation of the hydraulic drag of tangential swirlers. Three types of swirler devices made with straight, profiled, and circular channel walls were studied within a wide range of design and process parameters. Simulation modelling on the Comsol Multiphysics platform was used to calculate hydraulic drag and determine the velocity and pressure fields. This allowed obtaining a dependence of the hydraulic drag coefficient of the investigated swirlers and identifying parameters affecting their hydraulic drag.
Prognostication of fire of oil and oil products storage tank farms and engineering and technical solutions
Authors: Zvyagintseva A V , Mezhova L A , Sazonova S A , Stenyukhin L V , Chertkov P V 
Published: November 2021

Abstract
The object of the study is «Severnaya oil depot of the Lipetsk region». This article defines the occurrence and development of a fire in the tank and the dependence of a number of factors, also indicates the type of flammable liquid, the presence of an explosive concentration inside the tank, the place of the fire, the design features of the tank, the presence and condition of fire protection systems. Also, an assessment of the object from the position of fire hazard was carried out, the calculation of forces and means ensuring their timely and effective connection in cases of fire. The necessity of using modern extinguishing means to eliminate the resulting fire is shown.
Obtaining a diesel fuel component from liquid products of oxidative pyrolysis of wood
Authors: Buryukin F A , Safin V A , Kositcyna S S 
Published: November 2021

Abstract
Recycling and rational use of wood-processing industry waste is an urgent task for the economy and industry. On the basis of experimental studies on the oxidative pyrolysis of Siberian pine and Downy birch, a basic technological scheme for components of motor fuels obtaining is proposed. It is shown that the main components of liquid products of wood pyrolysis in water vapor are aromatic and saturated hydrocarbons, as well as oxygen-containing compounds that need to be hydrogenated.
Processing of biomass in order to obtain energy components
Authors: Kolenchukov A , Petrovsky E A , Bashmur K A , Sinitskaya A Ye , Tynchenko Ya A 
Published: November 2021

Abstract
This article presents a classification of existing types of biofuels obtained from biomass. Pyrolytic methods of biomass processing are characterized. An experimental setup for producing hydrogen and carbon nanomaterials is presented. The purpose of the experiment was to determine the amount (liters) of produced biohydrogen per unit of time (hour). With an increase in the temperature of the process, the yield of finished products increased. The choice of the appropriate catalyst also plays an important role.
The paper-forming properties of hemp fire peroxide cellulose in combination with wood sulphate cellulose
Authors: Marchenko R A , Pen R Z , Shapiro I L , Ambrosovich Y A 
Published: November 2021

Abstract
Hemp fire (Cannabis sativa) was delignified with the reaction mix “acetic acid - hydrogen peroxide - sulfuric acid catalyst - water” under sulfuric acid concentration of 0.45%, liquid module of 6, and temperature of 85 ° C. The cellulose was ground to 34 … 36°SHR and mixed in different ratios in compliance with the simplex-centroid experimental design with bleached sulfate softwood and hardwood pulp. The influence of the mixed composition formulations on the main strength properties of paper castings has been studied. It has been concluded that technical cellulose obtained from hemp fire applying this method, can be used for paper products manufacturing in combination with sulphate cellulose from coniferous and deciduous wood.
Experimental testing of the effectiveness of novel hydrocyclones for separation of impurities in biofuels
Authors: Petrovsky E A , Bashmur K A , Kolenchukov O A , Kachaeva V A , Sinitskaya A Ye 
Published: November 2021

Abstract
This paper investigates the potential sources of renewable energy, in particular biofuels. Biofuels tend to contain multiple harmful impurities that need to be separated if the biofuel is to have good energy performance, and the systems that run on it to produce electricity or heat are to operate more reliably. The paper discusses use of hydrocyclones as the most productive and reliable biofuel purification method. It dwells upon the factors that negatively affect separation of mixtures in a hydrocyclone, which are attributable to the complex hydrodynamics of the flow in such a unit. In order to eliminate these factors, the authors hereof have developed two hydrocyclone designs. An experimental test bench was designed and made to test these designs. Parts of the units were 3D printed from an environmentally friendly material. For testing, we used a biodiesel made from waste cooking oil with an impurity content of 23%. Experiments showed a maximum separation rate of 94.2%. The proposed solutions did improve the effectiveness of biodiesel mixture separation. These designs can be effectively used to separate non-homogeneous mixtures.
Group control of air-cooled gas apparatuses
Authors: Hoshimov U H , Ishnazarov O Kh 
Published: November 2021

Abstract
The paper considers the possibility of reducing electric power consumption by aircooled gas apparatus of a gas compressor station. The authors propose a system with breakdown of ventilators into IV groups with five ventilators in each group. Comparison of operation modes of a traditional cooling system and a grouped one with fans speed regulation on the basis of a frequency converter showed that the grouped handling system saved up to 40% of electric power.
Methods of reduction of interference signals in electromagnetic conductors that measure fluid flow
Authors: Amirov Sulton F , Ataullaev Aminjon O , Sayidov Muzaffar K , Togayev Islomjon B 
Published: November 2021

Abstract
The pressure in the fluid flow, especially in the pipes of closed water supply systems, is generated mainly by pumps, and the water flow is usually pulsating. Electromagnetic transducers used to measure such nonstationary and pulsating fluid flow rates must have low inertia and high dynamic accuracy. In such cases, the frequency characteristics of electromagnetic transducers that measure fluid flow are their main parameters. It should be noted that the performance of the converters used to measure the flow rate of pulsating fluids should not depend on the change in the distribution profile of the flow velocities, otherwise additional measurement errors will occur. It is used in measuring non-stationary and pulsating fluid flow rates in controlled and controlled technological processes.
Microwave solid fuel ignition
Authors: Kondratev R V 
Published: November 2021

Abstract
The article continues the study of the effect of microwave exposure on solid fuel. On the basis of the experimental studies, the dependences of changes in the temperature and humidity fields of the fuel on the time of microwave exposure, to arson, have been established. The possibility of using the microwave electromagnetic field to automate the process of burning solid fuel in a boiler plant, afterburning unburned fuel residues is considered. The mechanism and basic conditions of these processes are presented. The influence of this technology on the intensification of the fuel ignition process, its homogenization, an increase in energy characteristics and a change in the elemental composition, an increase in the efficiency of a boiler plant, a decrease in chemical, mechanical underburning and harmful emissions of a boiler plant is considered. The main conditions of the applied technology are: placement of the microwave generator on the combustion device of the boiler unit, the size of the solid fuel samples or its contacting pieces should be less than the wavelength of the microwave electromagnetic field (12.4 cm), the moisture content - within the range from 10 to 95%. The intensification of the process of burning solid fuel also depends on the type of fuel, its physical and chemical properties (various types of coal, wood fuel, including wood waste, peat, and others). Modernization of boiler plants using this technology is possible by unifying projects that take into account the correspondence of microwave generators to the thermal power of boiler units.
Simulation of the process of current distribution in a traction rail network
Authors: Isaicheva A G , Basharkin M V , Zolkin A L , Malikov V N , Saradzheva V 
Published: November 2021

Abstract
The article synthesizes a simulation model of a section of a traction rail network, analyzes the norms of permissible asymmetry current, at which a choke-transformer is able to function with a set quality. The simulation of the current distribution process that occurs in the traction rail network during the movement of trains of increased weight and length has been carried out. The graphs of the dependence of the asymmetry current on the traction current consumed by the electric rolling stock have been obtained, and the simulation of the dynamics of changes in the traction current in each of the rail lines has been carried out when the train was moving along a section of the traction rail network. Conclusions about the need to monitor the state of traction rail network elements, the service life of which in heavy traffic conditions is significantly reduced both due to dynamic loads and due to overheating due to the passage of increased traction currents have been made.
Creation of a software and hardware product of a real-time system for collecting, accounting and managing data transmission of an intelligent transport system in context of the IoT
Authors: Zolkin A L , Munister V D , Lavrov E A , Aygumov K G , Saradzheva V 
Published: November 2021

Abstract
Some aspects of the functioning of modern microcontrollers of the Internet of Things in conditions that are close to real-time systems are reviewed in the article. Attention is paid to the aspects of the theory of physical data transmission, the significance of the delay metrics in the data transmission path is substantiated and emphasized. These delays (in view of the generalization of measurement results) determine the control accuracy and controllability of the data processing system as a whole, and also affect the reliability of the results. The process of formalization of the architectural template of a data collecting and accounting system for a control device (which is widespread in intelligent transport systems and the Internet of things) is described. The practical application of the approach in synchronous control through the implementation of a web interface and a control language in a microprocessor system (which can be possible at low traffic transmission rates) is substantiated. In conclusion, a generalization of the scope of application of the developed specialized computer system in transport field is given.
Improving the safety of train lighting devices in curves
Authors: Frolov N O , Elkin E M 
Published: November 2021

Abstract
The article presents a system for correcting the direction of the light beam of a rolling stock searchlight in curved sections of the track. The dependence of the angle of deviation of the axis of the light beam of the searchlight on the angle of inclination of the trolley is determined. The principle of correction of the light beam of a rolling stock searchlight using a matrix LED searchlight is described.
Results of calculations of soot formation in a tractor diesel engine running on biofuel
Authors: Yurlov A S , Medvedev V I , Yunusov G S , Lopatin O P , Novikov A M 
Published: November 2021

Abstract
When burning fuel in a diesel internal combustion engine, soot is an undesirable product. To reduce the soot content in the exhaust gases, it is necessary to know the physical and chemical bases of the process of soot formation and soot burnout. Due to the determining role of acetylene in the formation of polycyclic aromatic hydrocarbons in rich mixtures in the low-temperature zone and the key role of acetylene in the surface growth of a particle in the high-temperature zone, it is concluded that the rate of surface growth of a particle is proportional to the concentration of acetylene in the reaction zone, which can be determined by the gas-kinetic method, numerically solving a system of differential equations for the components of the gas mixture under consideration.
Parametric synthesis of stabilizing neurocular control of a technological module
Authors: Sizykh Viktor , Daneev Aleksei , Oboltin Roman 
Published: November 2021

Abstract
The article proposes a new approach to combined parametric synthesis (synthesis in real or accelerated time) of neuroregulators of multidimensional and multi-connected physical systems and technological processes based on the application of the velocity gradient method in differential form and the theory of sliding modes.
Automatic target adjusting braking of a shunting stock with an adaptive control law
Authors: Kruglov S P , Kovyrshin S V , Ivanov P Yu , Korsun A A , Kovshin A S 
Published: November 2021

Abstract
The article deals with the problem of automation of target adjusting braking of a shunting stock. It is proposed to build it on the basis of an adaptive control algorithm capable of functioning under the current uncertainty of the parameters of the control object. It is based on a scheme with a current parametric identification assigned by an implicit reference model and using “simplified adaptivity conditions”. For the synthesis of the control, the approach implemented in a standard locomotive system for automatic braking control to maintain the target speed of movement depending on the distance to the target point is used. The results of simulation modelling are presented.