bluuebunny/crossref_metadata_2025_split huggingface dataset:
DrumCorr program for selecting volcanic earthquake multiplets based on cross-correlation analysis
Authors: Zavedevkin I A , Shakirova A A , Firstov P P 
Published: November 2021

Abstract
The DrumCorr program based on cross-correlation detection has been developed to identify multiplets of the volcanic earthquakes. The program is implemented in Python 3 and reads ASCII and MiniSEED seismic data formats. The article presents the algorithm of the program, describing the cross-correlation detector and an example of subsequent processing of seismic data. The program was applied to volcanic earthquakes of the «drumbeats» seismic regime and allowed to identify earthquake multiplets characterized by various wave forms. The article presents the algorithm of the program, describing the cross-correlation detector, the features of the weak volcanic earthquakes selection by the STA/LTA method. And the primary analysis of the values of the correlation coefficients with the calculation of their standard errors depending on different signal-to-noise ratios.
Applications of big data and communications to sustainable development of smart cities
Authors: Gayer A V , Chernyshova Y S , Mamai I B 
Published: November 2021

Abstract
The formation of a smart city is a dynamic process that involves the implementation of systemic steps that transform the city into a comfortable environment for living. Smart cities are evolving on the basis of a flexible telecommunications architecture for IoT devices. Existing sustainability technologies require a large amount of computing power to process IoT data. For effective detection and localization of dysfunctions of complex socio-technical systems of smart cities, it is proposed to use an approach based on a parametric representation of objects of interest. In order to eliminate the influence of the variability of the Internet of Things on the classification accuracy, it is proposed to use a combination of optimality principles, taking into account the parameters of energy consumption, processor and memory usage.
Formalizing and securing relationships on multi-task metric learning for IoT-based smart cities
Authors: Savelyev B I , Solodov S V , Tropin D V 
Published: November 2021

Abstract
The use of modern information and communication technologies is an essential condition for the formation of the transport infrastructure of a smart city. Scientific and methodological approaches are developed to effectively monitor the transport infrastructure of a smart city based on multi-channel metric learning in the Internet of Things. The proposed solutions provide invariance to the type and nature of the movement of objects. The principles of technical implementation of the proposed method are substantiated using the characteristics of unmanned aerial vehicles of a smart city. Adaptive automatic switching of transport infrastructure monitoring channels is implemented in the form of a neural network analyzer software.
Synthesis method of orthogonal encoding and decoding matrices based on integers, providing the implementation of code division of channels
Authors: Vinar P O , Rabin S V , Rabin A V 
Published: November 2021

Abstract
The method of code division of binary channels based on the arithmetic analogue of convolutional codes is investigated. The synthesis method of encoding and decoding matrices is proposed for implementing a code division of channels regardless of the number of users. The synthesis and implementation of theses pairs of matrices will significantly simplify the schemes for constructing encoding and decoding devices. Research results can be used in various communication technologies: in real-time systems, in distributed systems in on-board equipment complexes, to ensure reliable information transfer.
Computational approach to synthesis of the multiversion structure of distributed information decision-making support system
Authors: Kovalev I V , Testoyedov N A , Voroshilova A A , Kovalev D I , Borovinskii D V 
Published: November 2021

Abstract
The computational approach to synthesis of the multiversion structure of distributed information decision-making support system is presented. A formal model of the local information system is given. This system is intended to ensure the functioning of a complex control system based on the multiversion approach and consisting of a set of multiversion objects. The problem of distribution of objects by local information subsystems has been solved. For a set of valid queries in a distributed system, the answers for the decision maker are formed sequentially without repeating queries. To take into account certain requirements regarding the structure of a distributed system, it is necessary to formulate these requirements in formalized constraints and introduce them into the mathematical description of the problem. Note that the effectiveness of the targeted use of the system depends both on the results of synthesis (structure and parameters of the system) and on the correct organization of the subsystem for monitoring its technical condition during operation.
Residual life management of cyber-physical transport systems
Authors: Susarev S V , Orlov S P , Ja Kravets O , Ponkratova A S 
Published: November 2021

Abstract
The article deals with the problem of assessing the residual life of robotic agricultural vehicles. This problem is inextricably linked to the organization of effective vehicle maintenance. The robotic vehicle has a multifunctional remote diagnostics system, which makes it possible to assess the probability of component failure in real-time. In virtual commissioning, simulation is the most appropriate tool for researching and finding effective maintenance solutions. A simulation model based on timed colored Petri nets is proposed. The structure of the model is given, and its modules are described. Research is carried out by the method of statistical tests on a simulation model. An example of evaluating the delays in executing a production task, depending on the maintenance procedures and the probabilities of robotic vehicle unit failures, is given.
Mechanisms of power distribution: principles of kinematic and force analysis
Authors: Chajkin A P , Yu Dobretsov R , Sokolova V A , Tikhonov E A , Kalimullin M N , Latypov R M , Nuretdinov D I 
Published: November 2021

AbstractThe article considers the features of performing kinematic and power analysis of a controlled power mechanism for the transmission of wheeled transport and transport-technological machines. Such mechanisms are currently used mainly on cars in order to improve handling, stability, traction and dynamic properties in severe road conditions. Such mechanisms are not produced in Russia, but theoretical studies are currently being conducted, the results of which will allow determining the main parameters of the mechanism and synthesizing its kinematic scheme. The proposed approaches are based on the methods used in the kinematic and force analysis of planetary gears, but it is taken into account that the mechanism of power distribution during operation has two degrees of freedom. It is indicated that there is a structural and functional similarity between the power distribution mechanism of the car and the turning mechanism of the tracked vehicle. A method is proposed for calculating the gear ratio of the power distribution mechanism according to the condition of matching the minimum possible turning radius provided by the steering trapezoid kinematics and the calculated turning radius.
Design of a system for fastening the pipelines’ elements to be brazed of an automated gas metering unit
Authors: Tynchenko V S , Kukartsev V A , Kuzmin N V , Lysyannikov A V , Katargin S N , Stashkevich A E 
Published: November 2021

Abstract
The article discusses an automated measuring installation, and also analyzes the subject area. Some types of soldering are considered (capillary, diffusion, contact-reaction and others). The choice of induction brazing for the soldering of pipeline elements of an automated gas metering installation has been substantiated. The work presents the installation of induction heating, considering the required technological parameters. Based on this installation, the basic diagram of the Fitting and the schematic diagram of the connecting sleeve were corrected, which will allow the development of a mobile induction installation as well as collapsible inductors. Potential induction equipment and the developed designs can be used to connect pipelines in the oil and gas industry.
Effect of vibrations on the residual stress field formation during milling of high-strength aluminum alloys
Authors: Yu Nikolaev A 
Published: November 2021

Abstract
The authors examine the influence of high-speed milling on the distribution of residual stresses in parts made of structural high-strength aluminum alloys Al-Cu-Mg, which are the main structural materials in the aerospace industry. Milling was carried out at high cutting speeds. Different tool settings were used to balance the instrument. Plastic deformation occurred in the part’s surface layers. Residual stresses were measured by the X-ray method. It was found that high-speed milling creates residual compressive stresses that are favorable for the operation of the part. The depth of the residual stresses depends on the cutting mode. The article shows the relationship between residual stresses and the type of metalworking tool, processing conditions in structural parts made of high-strength aluminum alloys.
Security management of the functioning of a multi-node mobile cyber-physical system with a distributed registry based on an automatic model
Authors: Kravets Ja , Almusawi O A R , Doroshenko Ju N , Mamedov S N , Redkin Yu V 
Published: November 2021

Abstract
The problems and features of security management of the functioning of a multi-node mobile cyber-physical system with a distributed registry based on an automatic model are considered. The algorithm of the functioning of the system node allows for the possibility of increasing or decreasing its resources using various approaches. Models of stochastic automata with a variable structure are used to model such systems. The process of functioning of a node of a system with a distributed registry based on a chain of blocks in the form of a finite automaton with a variable structure and linear tactics is formalized, which ensures that the sequence of changing the variants of the node’s behaviour strategy depends on the conditions of the environment with which it interacts by constructing state matrices.
Energy model of transport machines with braking energy recovery
Authors: Solovev A A , Malkin D E , Melkomukov M A , Yakushevich I I , Kuguk A K 
Published: November 2021

Abstract
Most of the time, modern transport vehicles operate in unsteady modes. Undoubtedly, the reasons for the decrease in the efficiency of machines are fluctuations in speed and load, their deviations from the optimal values cause an increase in energy losses. Another reason for the increase in energy losses is the process of forced braking when it is necessary to stop the car. A class of vehicles with hybrid propulsion systems that can recover braking energy are currently being developed. Significant advantages among them are transport vehicles with a flywheel energy storage, which have a long service life. This article discusses the energy model of transport vehicles with the possibility of braking energy recuperation.
Study of the features of the characteristics of a hybrid airship turn
Authors: Borodkin S F , Kiselev M A , Shkurin M V 
Published: November 2021

Abstract
the dynamics of aircraft motion is determined, as is well known, by the acting forces. When an airplane is flying, these forces include the total aerodynamic force, the thrust force of the propulsion system, and the force of gravity. Hybrid Airship differs from an aircraft by the presence, in addition to the above, of aerostatic force, the value of which depends, among other things, on the height of flight of the Hybrid Airship. The presence of aerostatic force affects the maneuverability of a Hybrid Airship. The proposed article analyzes the changes in the characteristics of a Hybrid Airship turn caused by the presence of aerostatic force.
Forecasting the life of a structure relative to the operating mode
Authors: Ogorelkov D A , Lukashuk O A 
Published: November 2021

Abstract
The question of forecasting the service life of transport machines designed by taking into consideration the load spectrum, that is close to the real one, is an important problem at the calculation. One of the ways to simulate real operating conditions at the design calculation is a method of randomization quasirandom loads. Methods of randomization are widely used in many areas of science and technique. In the article, the numeric comparison of different ways of randomization is shown at the calculation for determining the service time using two techniques: the use of a standardized function of randomization in the high-level programming language of the and the law of normal distribution at its different parameters. The use of the law of normal distribution makes the more exact fatigue calculation because it makes it possible to simulate the quasirandom process that corresponds to the real operation picture to a greater degree. The results presented in the work make it possible to fulfill the calculation of the service time of the metallic structure that is under cyclic asymmetric loads, at the well-known nature of the application of loading to it.
The general directions of development of longitudinally oscillating ultrasonic emitters for gaseous media
Authors: Khmelev V N , Shalunov A V , Bochenkov A S , Nesterov V A 
Published: November 2021

Abstract
The article is devoted to the development of a longitudinally oscillating emitter designed to influence gas-dispersed systems. The main methods and directions of modernization of radiators are proposed in order to increase the area of the radiating surfaces of the radiators, increase the uniformity of vibrations and reduce mechanical stresses.
Loss of radio waves energy on radio lines satellite-earth station
Authors: Samoylov A G , Samoylov V S , Nasir S A X 
Published: November 2021

Abstract
The main contribution of this paper is to study the influence of various natural factors on the conditions for the radio signals propagation on the satellite - Earth links. It is shown that the ionosphere practically does not interfere with satellite radio communications at frequencies above 5 GHz. The mathematical model is proposed for the numerical determination of the attenuation of the radio signal depending on the optical visibility during dust storms along the communication path.
Effect of tungsten nanoparticles on sintering of the Sn-Cu-Co-W powder material
Authors: Ozolin A V , Sokolov E G 
Published: November 2021

Abstract
The effect of tungsten nanoparticles on the kinetics of sintering of the Sn-Cu-Co-W powder material used as a binder in diamond tools was studied. The W16,5 grade tungsten powder was mechanically activated in the AGO-2U planetary centrifugal mill for 60 minutes at the carrier rotation frequencies of 800 RPM. The mixture of tungsten, tin, copper, and cobalt powders was compacted by static pressing in press dies and then sintered in vacuum at the temperature of 820°C. The morphology and sizes of powder particles, as well as the structure of the sintered samples, were studied by the methods of scanning electronic microscopy. It has been demonstrated that tungsten nanoparticles have a noticeable effect on the process of dissolution-reprecipitation of cobalt in liquid-phase sintering.
Development of improved technology of production of sewing products using equipment for moisture-heat treatment from a composite material
Authors: Nutfullaeva Lobar 
Published: November 2021

Abstract
The article covers the conditions of formation of package materials for outerwear. The developed new technology for the production of apparels using a new cushion of press equipment for moisture-heat treatment from a composite material has been described. The method of forming a package of clothes from a multilayer textile material has been substantiated. The results of the examination of the experimental wear of jackets made according to the existing and proposed technology are presented in order to conduct a comparative study of the appearance, comfort and wear resistance of products made under identical conditions. Because of theoretical and practical research, the required dimensional stability of outerwear parts has been achieved in the process of the new technology of moisture-heat treatment.
Investigation of the physical and mechanical characteristics of the applied corrosion-resistant powder coating
Authors: Dovbysh N S , Zhdanov A V 
Published: November 2021

Abstract
This article presents the results of experimental work on the development of a laser complex for micro-and nanomodification of metal surfaces using hybrid technologies. As an alloying material, a corrosion-resistant composite powder of the national brand was chosen, which is used in industry to prevent the occurrence of corrosion formations on the working surfaces of the executive parts of machines. One of the most used national grades of structural carbon steels was chosen as the substrate. The parameters of the laser radiation varied in two parameters: scanning speeds in the range of 12-15 mm/sec and radiation power in the range of 3-5 kW. As a result of the work carried out under various power modes, prototypes were obtained. On their basis, tabular data on the obtained values of microhardness, wear resistance and friction coefficients are compiled. The description of the obtained results is given and the direction of further work is indicated.
Digital model of the oil spill process on the Earth’s surface
Authors: Dorrer Georgy , Yarovoy Sergey 
Published: November 2021

Abstract
The Fourth Industrial Revolution currently taking place has an impact on human interaction with the environment, which must move to a new level, ensuring the harmonization of the needs of mankind. Cyber-physical systems can play an important role in the environmental sphere. The possibility of creating a digital model of the process of oil spills with their penetration into the ground and the adjacent water body, which causes significant damage to the environment and the economy, especially in the northern regions, is being considered. An approach to solving this problem is proposed, based on the representation of the soil contamination area in the form of a set of flat layers, each of which is calculated by the method of movable grids.
Analysis of the issue of the selection, operation and improvement of thermal insulation materials for pipelines of heating networks
Authors: Balzamova E Yu , Balzamov D S , Bronskaya V V , Minnegalieva Ch B , Khairullina L E , Khabibullina G Z , Ignashina T V , Kharitonova O S 
Published: November 2021

Abstract
Improving the energy efficiency of thermal energy generation, transportation and consumption systems is one of the priority tasks of the modern development of the fuel and energy complex of Russia. The climatic conditions of Russia determine the heat supply systems as an energy-intensive industry that consumes up to 40% of the primary energy resources of country. Russia is characterized by a high level of centralized heat supply, mainly from sources of combined generation of heat and electric energy, which led to the creation of an extensive pipeline system with a length of more than 250 thousand km with a diameter of 57 to 1400 mm. In practice, the following methods of laying pipelines are used: canal, canal-free, aboveground. The heat losses of pipelines of thermal networks amount to 324 million gcal/year, which is approximately 16% of the heat released to consumers, this indicates significant reserves of saving thermal energy. The successful solution of the problem of reducing heat losses during the transportation of the heat transfer agent can be achieved by using modern materials and developing highly efficient porous thermal insulation structures, as well as improving the methods of calculating heat networks and the optimal choice of thermal insulation materials for the required operating conditions.
Technological assurance of reliability of centrifugal pumps for pumping biomass processing products based on adaptive dampers
Authors: Kolenchukov O A , Kozhukhov E A , Petrovsky E A , Bukhtoyarov V V , Kachaeva V A 
Published: November 2021

Abstract
In almost every mechanical system, moving mechanisms slide over stationary parts, creating friction and, as a result, unwanted energy losses. In engineering, sliding or rolling bearings are most often used as supports. However, any system can benefit from a greater reduction in friction between components. As will be shown in this article, the stability problem can be solved by blocking vibrations in the radial direction. The latest technological advances in the field of manufacturing magnetic materials make it possible to integrate magnetic bearings with permanent magnetization (hereinafter - MBPM) into a larger number of mechanical systems. This blocking of radial movement is carried out without the use of a mechanical sliding bearing, chosen for its simplicity and ease of integration. To facilitate the integration of the MBPM into the overall system of the device, it is important to know the mechanical properties of magnetic bearings, namely stiffness and damping, as well as the performance characteristics and limits of their operation. This article examines the possibility of using an adaptive damper in centrifugal pumps to ensure the technological reliability of the equipment. Alternating permanent magnets in the direction of their movement is the most optimal option, leading to large and smooth hysteresis loops of force - displacement. The proposed arrangement of magnets ensures the adaptability of the device with the determination of its optimal size, and also takes into account the edge and surface effects in the design of the damper. In addition, the article discusses theoretical and technical issues of levitation - free floating of bodies. Magnetic suspension can be used to study only those processes where mechanical connections are undesirable. The use of magnetic suspension for balancing centrifugal pumps during transportation of biomass processing products, supports of mixing devices in reactors in biomass processing reactors and other machine components opens up wide opportunities.
Reduction of soot carbon in the exhaust gases of a tractor gas-diesel engine
Authors: Akimov A P , Lekomtsev P L , Likhanov V A , Lopatin O P , Vasiliev A O 
Published: November 2021

Abstract
The rate of oxidation of carbon (including its dispersed forms) has a value much higher than the rate of gasification. Therefore, in the initial part of the flame, when oxygen is still contained in the gas phase, the oxidation of soot will be the process on which the change in the size and concentration of dispersed carbon particles mainly depends. The intensity of oxidation and gasification of dispersed carbon in the flame largely depends on the development of the mixing process, determined by the aerodynamics of the fuel and air jets. The paper presents an analysis of the influence of mixing processes on the oxidation and gasification of dispersed carbon in a natural gas flame in the study of homogeneous flames and mixing of turbulent jets. The results of industrial studies of the mixing of fuel and air in a diffusion torch are taken into account. The results allow us to evaluate the influence of various aerodynamic factors on the processes occurring in the glowing flame of natural gas in the combustion chamber of gas diesel.