bluuebunny/crossref_metadata_2025_split huggingface dataset:
Forecasting steppe fires using remote sensing data of time series
Authors: Goryaev V M , Basangova E O , Goldvarg T B , Bembitov D B , Djachnaeva E N , Lidzhi-Garyaev V V 
Published: February 2021

Abstract
In fire monitoring systems, Internet of Things sensors allow predicting the area of fire in combination with machine learning. This article provides an insight into the use of machine learning models in predicting steppe fires. The work uses statistical methods for forecasting time series, methods of regression analysis and forecasting techniques. This project explores a data mining approach for predicting steppe fires. Several different data mining methods are considered and at least five different special methods of feature selection (spatial, temporal, Fire Weather Index components, weather attributes and our own developed classes). At the moment, data mining software systems have been tested on real data collected in the southern regions of Kalmykia. The study used open data from meteorological stations, our own database time series collected over the past 3 years, tested various data mining methods and at least five meteorological inputs, which will allow predicting a burnt area of small and medium fires, an area of dust storms, etc. The results show that the k Nearest Neighbor model is the most appropriate choice for the steppe fire forecasting model. The chosen model takes into account both meteorological data and images for early forecasting of FIRMS fires.
Technology of spacecraft on-board equipment design support
Authors: Isaeva O S 
Published: February 2021

Abstract
The Technology is shown that combines knowledge bases, information and graphic resources into a set of automated software tools. Technology includes the methods of intellectual models’ building and the tools of scenario creation for measurement, data transmission, test results’ control and visualization. It is implemented in the software-mathematical model of the on-board equipment control system and the software of the testing equipment. Software is integrated into a technological platform for the design and testing of technical systems. Application of Technology reduces the time of the on-board equipment design and production, reduces import dependency of Russian space development and increases its competitiveness in the space systems’ market.
UWB locating system in semi-open space
Authors: Krasnov T V , Sharshavin P V , Baturin T N , Tokarev R I , Novikov A V 
Published: February 2021

Abstract
Simulation of the processing of navigation signals and estimation of the noise immunity of the receiver of an ultra-wideband positioning system in difficult conditions for receiving GNSS signals with dense taiga vegetation was performed. Experimental data were obtained on microwave interference and the conditions for the propagation of radio waves at real production facilities, including operating mountain taiga geophysical profiles.
Indoor ultrasonic positioning system for mobile objects
Authors: Morohin D V , Totsky A A 
Published: February 2021

Abstract
At present, automation of many types of works is widely distributed. When solving the automation problem, it is often necessary to use methods for determining the position of individual parts of an industrial or other system, as well as controlling the moving elements of such a system. In the paper, one of the variants of solving such a problem is considered. The determination of the object coordinates is calculating from the computed distances to known points. There are several ways to implement this method. Authors offer a solution that provides real-time control of the mobile device, automatic location control and delivery of the moving part of the system to a specified point with high accuracy. The system provides scalability for solving the problem of positioning in various rooms.
An algorithm for generating consistent decision rules for assessing template diagrams
Authors: Trebukhin Alexey G , Filatova Natalya N , Sidorov Konstantin V 
Published: February 2021

Abstract
The authors consider an algorithm for generating consistent decision rules for choosing a rational alternative from a set of automation system functional diagrams using the mathematical apparatus of fuzzy logic and rough set theory. The algorithm enables a multicriteria assessment of complex diagram variants without a noticeable increase in time complexity compared to the assessment of single-loop diagrams. The paper formulates the requirements for training sets of functional diagrams, taking into account the characteristics of their circuits and application areas. The use of the algorithm simplifies the development of automation diagrams for technological objects and allows improving the quality of their design solutions.
Stochastic regulation of the technological aggregates
Authors: Kosarevskaia S A , Shukalov A V , Zharinov I O , Zharinov O O 
Published: February 2021

Abstract
The problem of stochastic regulation used in technological units to control equipment is investigated. Stochastic control takes into account the random nature of the data sample that statistically characterizes the accuracy and stability of automatic processes. Stochastic regulation is performed in the working area of the technological unit and at the level of the cloud containing mathematical tools for analyzing signatures. Data exchange at various levels of control is implemented in a telecommunication network built on the principle of the wireless Internet of Things. The structure of the basic element (technological unit) of cyber production is given. The mechanisms of network communication of technological units and the principles of network-centric control that are relevant for stochastic control are described. It is shown that defect-free automatic control of cyber-production uses algorithms that form the basis of machine learning methods. The advantages of computer-synthesized control of the mechanization of cyber-production by means of communication tools of the Internet of Things are described.
Using genetic algorithms for operational planning of cement mills loading
Authors: Svetlichnaya V I , Savkova E O , Shumaieva O O , Chengar O V , Shevchenko V I 
Published: February 2021

Abstract
The article discusses the problem automating the construction of schedules for cement production. The necessity using a computer system for planning the loading of technological equipment is substantiated in order to develop the optimal use of available resources for the timely and high-quality execution production tasks. The essence of the problem is shown, which is to allocate resources (cement mills and produced brands of cement) the production system for a given target plan so as to exclude deviations the real plan from the target, as well as to reduce the number of mill switchings to a minimum. The formalization the task planning the loading the mills is carried out and those essential parameters of the process are given, which are selected as the initial data for solving the task planning the operation of grinding mills. The solution to the problem constructing schedules for the operation of cement mills is based on the use of a genetic algorithm, for which an implementation sequence is proposed. The results solving the problem are also presented, which confirm the correctness the chosen method and its implementation.
The main directions of smart lighting systems development as one of the ways to improve energy efficiency
Authors: Kolomiets V I 
Published: February 2021

Abstract
The aim of the research was to study and generalize the directions of smart lighting systems development as one of the ways to increase energy efficiency. To obtain statistical data, the Elsevier publisher’s Scopus database was used. In order to assess the relevance and significance of research in this area, the work provides statistics of publications over the past five years. As a result, the main directions of smart lighting systems development were identified, aimed at using smart lighting systems as the basis for organizing Smart City services.
On the identification of bearings of active interference sources
Authors: Trofimets E N , Mazakov E B , Trofimets V Ya 
Published: February 2021

Abstract
The features of bearing information processing in a two-position radar system are considered. It is shown that in these systems, due to the absence of redundant information, the identification of bearings is a multi-alternative problem of statistical selection of hypotheses, the solution of which is especially important when locating a significant number of sources of active interference. The analysis of the matrix of coordinates of intersections of azimuthal bearings is carried out, a rule for identifying possible hypotheses of identification is formulated. To reduce the a priori uncertainty in the identification of bearings, it is proposed to use the energy differences of interference signals.
The unit of cubic matrices in modeling of micro-relief
Authors: Belkin E A , Poyarkov V N , Markov O I 
Published: February 2021

Abstract
The apparatus of cubic matrices allows us to give a classification of the contiguous cuboid. Invariant theory is used for this purpose. A cubic matrix is a generalization of the concept of a square or rectangular matrix. Increasing the dimension of a square matrix by one requires a new definition of the product of three-dimensional matrices. It is necessary to search for new invariants for the operator of parallel transfer of the coordinate system and the operator of rotation around the origin. The contiguous cuboloid allows us to give a three-dimensional geometric model of the microrelief an order of magnitude more accurately than the contiguous paraboloid does. The geometrical structure of the contiguous coboloid is investigated by the method of sections. The curvature of the surface at the point of contact with the cuboid is estimated by the curvature tensor, which is analogous to the Riemann-Christoffel tensor. The curvature of the surface in the local area of the point of contact is estimated with certain assumptions. There is no more precise geometric object that defines the curvature of the surface.
Computer-aided manufacturing: Industry 4.0
Authors: Kurasov D A 
Published: February 2021

Abstract
The modernization of the Russian economy and its transition to an innovative development path are inextricably linked with the renewal of production and its material and technical base. In recent years, there has been a tendency to increase the economic potential of highly developed countries through scientific, technological and technological innovations, with the State playing an active role. There is a trend towards a digital industry based on the so-called Industry 4.0. This leads to massive implementations of cyber physical systems in production, to the automation of most production processes, the endowment of devices with artificial intelligence and the introduction of many other modern technologies. All this has a significant impact on increasing productivity and reducing the cost of production.
Numerical study of the combustion of a flat layer of methane gas hydrate
Authors: Davletshina M R , Gimaltdinov I K , Stolpovsky M V , Akchurina V A 
Published: February 2021

Abstract
In the work in a flat-one-dimensional formulation, a mathematical model and the results of modeling the combustion process of a gas hydrate as a result of its ignition with a mixture of methane and an oxidizer are presented. It was assumed that the rate constant of a chemical reaction depends on temperature according to the Arrhenius law. The solution was carried out by a numerical method based on the method of catching the phase transition front into the nodes of the spatial grid. On the basis of the obtained solutions, the distributions of the main parameters of the system, as well as the dependences of the highest temperature of the gas mixture and the rate of decomposition on time, were constructed.
The use of airlift during drilling of technological wells
Authors: Karmanov T D , Kaliyev B Z , Assanov N S 
Published: February 2021

Abstract
The article describes new drilling methods recognized as testing works in the drilling company “Volkovgeologiya” JSC. A special feature of this method of drilling is the introduction of the airlift principle. The proposed technology differs in that it is applicable during well drilling and does not require investments for reconstruction, which is significantly reflected in the number of repair and restoration works. With a wide application of this method, the possibility of providing a huge economic effect in the operation of technological wells is described.
Influence of the initial turbulence of the air suspension flow on the speed and limits of flame propagation
Authors: Egorov A G 
Published: February 2021

Abstract
The paper presents experimental data on the effect of the initial turbulence of the air suspension flow of aluminum particles on the speed and limits of flame propagation. It was found that when installing the grate, depending on the diameter of the chamber and the size of the aluminum particles, the flame propagation speed can either increase or decrease. In the flow of air suspension of aluminum particles ASD-1, a simultaneous increase in the intensity and scale of turbulence leads to an increase in the flame velocity and expansion of the flame propagation limits.
The prospects of using of flywheel energy accumulators in the lifting and transport industry
Authors: Barbashov N N , Barkova A A 
Published: February 2021

Abstract
The increase in the energy consumption of lifting and transport machines in transient operating mode requires the creation of mathematical models and, on their basis, the development of recommendations for increasing economy. Important reasons for reducing the economy of lifting machines are changes in speed and load, deviations from the optimal value and causes an increase in energy dissipation. Another reason for the increase in lost energy is the process of machines with a loss of kinetic energy during their shutting-off. Increasing the economic showings of machines is possible by reducing its nominal power, which leads to a deterioration in dynamic qualities. A promising method of increasing the economy of machines is using of braking energy recovery, its accumulation and using during further acceleration. In this case, the increase of efficiency occurs without reducing the dynamic qualities and showings of the machine.
Improving the construction of grinding disk mill for producing fibrous semi-finished products
Authors: Vititnev A Yu , Alashkevich Yu D , Chistova N G , Marchenko R A 
Published: February 2021

Abstract
The article states that grinding is the most important process; it determines the efficiency characteristics of the fibrous semi-finished product and the properties of the products made of it. The effectiveness of this process is influenced by some factors, but a tackle is of the most importance. Recently, the issues of selecting and creating the tackle design for wood fibers preparing, in contrast to cellulose and waste fibers, remain significant. In this regard, a scientific approach to solving the issue of creating the tackle design is required for the effective preparation of high-quality wood fibrous semi-finished product. The article presents theoretical studies for efficient evaluation of the existed structures for grinding wood fibers in disk mills. It has been a basis for developing a new geometry of the tackle and predicting its efficiency along with numerous preliminary studies and investigations carried out by various authors. The results of the experimental studies of the grinding process applying the existing structure and the results of the simulated experiment with the developed geometry of the tackle are presented. A comparative analysis of the influence of the design features of various types of tackles on the dimensional and efficiency characteristics and fractional composition of the semi-finished wood fibers was carried out. It was carried out on the basis of the theoretical and experimental studies, as well as the results of other authors studies concerning a grinding process and the influence of the of the semi-finished product features in the preparation of a fibrous semi-finished product in a disk mill.
Magnetic fluid phase separation in an electric field
Authors: Vegera Zh 
Published: February 2021

Abstract
The phase separation and structural organization of a thin layer of a magnetic fluid under the influence of a constant electric field are investigated. It is shown that the action of an electric field leads to the appearance of labyrinth structures in a thin layer of a magnetic fluid, which subsequently leads to the formation of a free charge at the boundary of this layer with the rest of the liquid volume. The results of the study of the current strength on the shear rate dependence made it possible to estimate the value of the surface charge density and the time of its formation in the near-electrode space. By artificially increasing the electrical conductivity of the initial magnetic fluid, it is shown that the formation of labyrinth structures in a magnetic fluid in an electric field occurs at a certain critical value of its electrical conductivity.
Modeling of electrochemical machining by point electrode tool with a jump anode potential change
Authors: Zhitnikov V P , Zaytsev A N , Sherykhalina N M , Zhitnikova N I 
Published: February 2021

Abstract
The distribution of the electric field in the electrolyte near the contact point of two detail parts with different values of the anode potential is investigated. The problem is relevant in connection with the development of technologies for welds machining in order to dissolve material layers that retain residual tension and do not create new tension. The methods of the theory of functions of a complex variable are used to solve the problem, since a stationary electric field with the properties of solenoidality and potentiality is considered. A singularity of the complex potential at the contact point is found by the method of conformal mappings. The solution of the problem is sought as the sum of a known function with a singularity and a function without singularities, which is defined as a power series with unknown coefficients. The coefficients are determined numerically by the collocation method, i.e. the problem is reduced to solving of equations system. The Gauss method is used for this purpose. The problems with the specified dependence of the anode potential on the current density is solved. The errors estimates have shown that by the developed method allows determining the desired parameters with sufficient accuracy. The distributions of the anode potential and components of strength on the surface of the detail are found. The resulting forms of stream lines allowed us to adequately describe the electric field which is the result of the superposition of the field of a point source and the field arising from the potential difference in different parts of the detail.
Impact of CVD-synthesis parameters and film thickness on growth rate of single-crystal diamond
Authors: Maslov A L , Polushin N I , Laptev A I , Martynova T V , Grechikhina A M 
Published: February 2021

Abstract
The widespread use of CVD-reactors of various constructions and the influence of many factors on the formation of energy-saturated reaction zone has led to the fact of significant difference of technological parameters optimal for each reactor even of one brand. An economically important parameter, in addition to the quality of the obtained single-crystal diamond layer, is the growth rate, which depends on many factors: the flow rate and chemical composition of gases, pressure in the reaction chamber, substrate temperature, the shape of the formed plasma cloud, dimensions and shape of molybdenum substrate holders and et al. This work is devoted to the experimental determination of the single-crystal CVD-diamonds growth rate across various synthesis conditions on Ardis 300. In research, we shown the effect of the thickness of the synthesized diamond layer on the rate of formation of subsequent diamond layers, which is associated with a change in the degree of misorientation between the crystallographic plane (100) and direction [100]. Also, this can be associated with an increase in the roughness of the growing surface, leading to an increase in the specific number of active centers thermodynamically favorable for carbon deposition during the formation of the crystal structure of diamond.
RES-powered charging stations for electric vehicles
Authors: Volkov S , Sidorova V , Orlov A , Ostashenkov A 
Published: February 2021

Abstract
The paper provides a comparative analysis of the structure of energy consumption and production in the countries of the European Union and Russia. It is shown that Russia is a promising country for the effective development and implementation of renewable energy sources. A block diagram of a charging station for electric vehicles, which will be powered by photovoltaic panels, is proposed. Unclaimed electricity in this case can be sold to the external network or smooth the load curve of the nearest transformer substation.
Effect of deposition current density on the Co–Ni/SiO2 alloy composite coatings using scanning jet electrodeposition
Authors: Jiang Wei , Qiu Mingbo , Shen Lida , Lou Guibin , Yang Xuegeng , Eckert Kerstin , Tian Zongjun 
Published: February 2021

Abstract
Co–Ni/SiO2 alloy composite coatings were electrodeposited on copper substrate by scanning jet electrodeposition at various current densities to study its effect on the morphologies, texture orientation, microhardness, adhesion force, wear resistance, and corrosion resistance of Co–Ni/SiO2 alloy composite coatings. The structure and performance of the material were characterized using a scanning electron microscope, XRD diffractometer, nanoindentation, scratch tester, friction and wear tester, and electrochemical methods. The morphologies of the Co–Ni/SiO2 alloy composite coatings changed from sparse and slender structures to dense starfish structures with an increase in current density. A part of Co precipitated in the form of a face-centered cubic structure and formed a solid solution with Ni, while another part of Co precipitated in the structure of the composite coating in the form of a hexagonal close-packed structure. The Co–Ni/SiO2 alloy composite coating exhibited excellent adhesion force, wear resistance, and corrosion resistance when the deposition current density was 130 A dm−2. Once the current density was exceeded, some microcracks appeared on the surface of the composite coating, after which the adhesion force and corrosion resistance decreased. The present study suggests that current density at 130 A dm−2 is more suitable than low current density for jet electrodeposition to prepare high-density and high-quality composite coating.