bluuebunny/crossref_metadata_2025_split huggingface dataset:
Time series forecasting using amplitude-frequency analysis of STL components
Authors: Chkalova D G 
Published: November 2021

Abstract
The problem of economic time series analysis and forecasting using amplitude-frequency analysis of STL decomposition is considered. An amplitude-phase operator was chosen as an apparatus for extraction the series harmonic components, the advantages of which (compared to the Fourier transform) are: calculations speed, result accuracy, simplicity and interpretability of software implementation. The forecast quality was carried out using the MAPE metric. Significantly higher prediction quality was achieved compared to Facebook Prophet forecasting package.
Intelligent information system for supporting design solutions in the conditions of multivariate selection
Authors: Sergeev M Yu , Sergeeva T I , Grebennikova N I , Popov D V 
Published: November 2021

Abstract
The modeling of multivariate choice problems in the design of products within the framework of an information and software system is considered. The typical elements and functions of the information and software system of multivariate choice are given. Models of optimization problems of forming acceptable sets of alternative solutions when choosing analogs of parts and components are proposed. The formation of the initial set of alternative solutions is carried out on the basis of an assessment of the design, technological, electrical and operational characteristics of the alternatives of choice. The formalization of the problem of the final selection of the composition of parts and components according to technical and economic indicators is given. The proposed models are based on the use of Boolean variables describing the alternatives of choice. The structure of a specialized database of bath rooms for storing the characteristics of parts and components and the results of intermediate and final selection of design solutions is also given.
Visualization of construction infrastructure objects
Authors: Zhadanov V I , Charikova I N , Shardakov V M 
Published: November 2021

Abstract
Building information modeling provides an integrated three-dimensional environment applied to the management of large-scale engineering projects, allowing you to reduce the cost and time for planning structures and requirements for the reliability of buildings. The purpose of this work is to develop a methodology for changing the layout and reliability factor during the visualization of three-dimensional models to improve the analysis of building plans. This approach will allow you to combine different analytical methods and approaches when planning different structures. The results of this work suggest new directions for future research in the field of information visualization for the construction complex. The system is compatible with portable and scalable mobile devices. The proposed system can also be used for pre-project architecture and augmented visualization, where proprietary developed methods are used to achieve the quality of photorealistic rendering.
Development of a system for analyzing and unloading road traffic using artificial intelligence
Authors: Akhmetov L M , Bikov D I , Khamidullin M R , Gareeva G A , Gabdullina G K 
Published: November 2021

Abstract
Every year, the growth rate of cars in Russia will continue to grow, which makes it extremely difficult to organize road traffic. To solve this problem, innovations in the automotive industry, such as smart traffic lights, are needed to more effectively regulate traffic on public roads. Therefore, an urgent issue is the development of a system for analyzing and unloading road traffic to improve the situation at intersections and subsequent automation through the introduction of artificial intelligence. The Arduino Uno was chosen as the layout for the organization of a smart traffic light.
Selection of neural network architecture and data augmentation procedures for predicting the course of cardiovascular diseases
Authors: Dorrer M G , Golovenkin S E , Nikulina S Yu , Orlova Yu V , Pelipeckaya E Yu , Vereshchagina T D 
Published: November 2021

Abstract
The article solves the problem of creating models for predicting the course and complications of cardiovascular diseases. Artificial neural networks based on the Keras library are used. The original dataset includes 1700 case histories. In addition, the dataset augmentation procedure was used. As a result, the overall accuracy exceeded 84%. Furthermore, optimizing the network architecture and dataset has increased the overall accuracy by 17% and precision by 7%.
Processing algorithms for finding the boundaries of areas of dangerous wind shear for on-board weather radar
Authors: Novikova Yu A , Ryzhikov M B 
Published: November 2021

Abstract
This report considers the results of the development of algorithms for processing radar data when working in the mode of detecting dangerous areas of wind shear, which use binary values of hazard signs in each direction of sensing as input parameters, are presented. The first of them implements data processing for each individual direction, and the second-joint processing in all directions. As a result of their work, it is possible to identify dangerous areas of wind shear that meet the spatial requirements of the international standards ARING-708A and DO-220.
Method of the optical recognition of technical documentation and the transformation of graphic information into machine-readable form for cognitive analysis
Authors: Dzyubanenko A A , Rabin A V 
Published: November 2021

Abstract
The paper proposes the implementation of the method of optical recognition of technical documentation and the transformation of graphic information into a machine-readable form available for cognitive analysis, which is based on the methods of binarization and alignment of images, text segmentation and recognition. The use of the proposed method will provide a dramatic reduction in the costs of cataloging, checking the completeness and inventory of documentation, as well as an increase in design quality due to the semantic analysis of documentation using a knowledge base that is updated automatically. The article presents the development of the algorithm for optical recognition of a document, preparation of an image for optical recognition of a document, an example of the application of the Sauvola method for binarization of an image, and an analysis of the research results. The proposed implementation allows the text recognition on scanned/photographed documents.
The problem of choosing the optimal performance in the multiprocessor computer system design
Authors: Efimov S N , Terskov V A , Yu Sakash I , Molokov V V , Nikiforov D L 
Published: November 2021

Abstract
The article presents the formulation of the problem of optimizing the structure of multiprocessor computing systems designed to solve control problems in real time. The features of this problem, which influence the choice of optimization methods, have been studied. It is concluded that this problem can be effectively solved using evolutionary methods of optimization. The considered models for finding performance can be used to optimize the architecture of multiprocessor computing systems. Besides, it should be taken into account that the resources allocated for the development and operation of computing systems are always limited. Therefore, it is advisable to consider the problem of optimizing the structure of a computing system as multi-criterial one: one criterion is the performance, and the other one is the cost of development and operation of the system. Acquired results can be used in development of multiprocessor computing systems for real-time systems, which is going to reduce the cost of development and operation of these control systems.
Information system for calculating paper-forming indicators of fibrous semi-finished products based on regression models
Authors: Marchenko R A , Yarovoy S V , Shurkina V I 
Published: November 2021

Abstract
The paper presents an information system for calculating the main paper-forming parameters of the pulp for given technological and design parameters of the grinding plant. The operation of the system is based on mathematical regression models of the processes that were obtained in the course of experimental studies of knife sets of various types. As input parameters in these models, the rotor speed, knife gap, concentration and degree of grinding of the mass are used. The output parameters are the grinding time, water retention capacity and average fiber length. The developed information system is a network web application with a modular structure. The modules are united by the main interface for the user. Each module implements a regression model for a specific type of headset. At the moment, the system has two modules for calculating the parameters of a percussion type headset and a headset with a curvilinear shape of knives. In the future, it is planned to add the ability to calculate indicators for headsets of other designs. It will also add the ability to solve optimization problems by finding the minimum or maximum value of the output parameters.
Method of analytical synthesis of coording control systems
Authors: Filimonov A B , Filimonov N B 
Published: November 2021

Abstract
The problems of coordinating control are discussed. The method of analytical synthesis of coordinating automatic systems is proposed. Their purpose of control is formulated in the form of the task of control relations between the state variables of a multichannel object or a group of objects. The problem of coordination is studied in a different formulation compared to the classical papers. Control processes are formed by means of two multi-dimensional contours: the contour of aggregate control by the dynamics of the object as a whole, and the contour of regulation of inter-coordinate relations. The autonomy of the second contour plays a key role in the proposed solutions. The procedures for calculating the control contours are based on the devise of the transfer matrices apparatus.
Synthesis method of circulant polynomial encoding matrices for the implementation of code-division multiplexing
Authors: Vinar P O , Rabin S V , Rabin A V 
Published: November 2021

Abstract
The method of the synthesis of circulant polynomial matrices for the implementation of the operation of code combining of channels on the transmitting side of the communication system has been developed. The structure of these matrices is the basis for reducing the complexity of encoder schemes and, consequently, the radiated power of radio transmitters of subscriber devices. The research results can be applied in communication systems with multiple access, with a wide coverage area, high quality of data transmission, high noise immunity, stability of communication channels from interception and eavesdropping.
On the application of a discharge with liquid electrodes for polishing metal surfaces
Authors: Kh Tazmeev B , Tsybulevsky V V 
Published: November 2021

Abstract
The work investigates the electrical parameters of the discharge plasma with a liquid cathode and a combined porous anode. The discharge is carried out in the vertical position of the plasma column, has a volumetric multichannel structure with a pronounced diffuse structure of the electrode spots. The influence of the porous element on the stabilization of the discharge characteristics is revealed. Discharges with a liquid electrolyte cathode continue to be of great interest from the point of view of practical application and are studied in a wide range of changes in physical and geometric characteristics [1 - 4]. Discharge plasma with a liquid cathode can be most effectively used for cleaning, polishing, with simultaneous removal of fractured and relief layers, hardening, gas saturation, surface activation, improvement of mechanical and other characteristics of agricultural machinery parts. In this work, for plasma polishing, parts of the bearing assemblies of disc harrows were selected.
Research of soil compaction process in area of contact with a wheel mover
Authors: Kokieva G E , Troyanovskaya I P , Orekhovskaya A A , Kalimullin M N , Dzjasheev A-M S , Ivanov A A , Sokolova V A 
Published: November 2021

Abstract
Practice of operating heavy wheeled machines (T-150K, K-700, K-701) and experimental data show that even if the average pressure of a wheel on soil is maintained, degree of its compaction increases. To explain this phenomenon, in our opinion, it is necessary to develop a mathematical model of interaction process of a deformable pneumatic with an elastic-plastic medium, which is considered to be soil subject to modern processing. Working parts of agricultural machines process a wide variety of materials, number of which is increasing, in addition, method of processing the same material is often changed in an effort to improve agricultural technology. This forces us to create new mechanisms for agriculture that were known before. Use of replaceable toothed working parts on flat-cut cultivators helps to reduce energy consumption and improve quality of non-moldboard soil cultivation. Article proposes a method for mathematical description of distribution of machine load over contact surface of a wheeled mover with deformable soil. At the same time, several assumptions and conditions were adopted, namely: volume of skeletal part of deformable soil element remains constant, independent of deformation; contact surface is a curve of two radii - in the load zone (Rl) and in the unloading zone (Ru), tire operating in driven mode has no skids; deformable soil is uniform in depth; wheel load is constant; tire radial stiffness along tread portion width is also constant in magnitude and direction; lateral pressure along deformable soil depth is small and is not taken into account in calculation.
Providing statistical stability of qualimetric studies on the basis of geochronological tracking
Authors: Ivakin Ya A , Semenova E G , Ruchev A G , Smirnova M S 
Published: November 2021

Abstract
Geochronological tracking has received wide recognition as an appropriate scientific and methodological tool and an effective information technology of qualimetric research in the interests of ensuring high quality of transport services, transportation efficiency, analysis of the facts of insufficient meeting the needs of the population with spatially remote services, etc. On the basis of geochronotracking, a procedure has been developed for statistical verification of research hypotheses about stable trends in changes in the quality of various spatio-temporal processes. The reliability and validity of accepting a particular hypothesis in the framework of a qualimetric research is determined by the representativeness of the volume of initial data on geographical movements, considered as a selection from the general population. This article is devoted to the analysis of this dependence and the development of an algorithm for assessing the specified stability (significance).
Mathematical model for assessing lateral stability of articulated tracked vehicles
Authors: Chajkin A P , Yu Dobretsov R , Sokolova V A , Teterina I A , Kamenchukov A V , Tikhonov E A , Bazykin V I 
Published: November 2021

Abstract
The article considers the problem of increasing transport productivity, operational reliability and safety during cargo transportation by using articulated tracked vehicles and road trains with active trailers. The influence of the introduction of an electromechanical drive, the modernization of the propulsion unit and the steering control system on the lateral stability of an articulated tracked vehicle is analyzed. A mathematical model is described for calculating the lateral stability of the chassis of articulated tracked vehicles used in the regions of the Far North, Arctic and Antarctic. The model is based on developments carried out for the chassis of an articulated wheeled vehicle. The model allows calculating to determine the key geometric and kinematic parameters of the rotation, taking into account the action of external forces. The use of holonomic constraints in determining the critical speed of movement is determined by the physical picture of the beginning of overturning, which corresponds to the achievement of the critical folding angle of the sections. This approach makes it possible not to use empirical coefficients when assessing the instantaneous position of the center of gravity of the system, the center of rotation, the radius of rotation of the center of mass, and the critical speed of the chassis. The moment of the beginning of the rollover is determined by the disappearance of the normal reaction under the link caterpillar. The onset of lateral sliding is determined by the lateral force exceeding the lateral adhesion limit.
Design of energy efficient inductors for connecting pipelines of oil and gas equipment
Authors: Kukartsev V A , Cherepanov A I , Kukartsev V V , Kuznetsov A V , Minkin A N , Egorov A V 
Published: November 2021

Abstract
The article deals with the problem of soldering the installation connections of equipment using induction heating methods. The analysis of the subject area has been carried out. Methods for obtaining permanent connections of oil and gas equipment are considered. A comparison of the characteristics of energy sources for welding is carried out, and the characteristics of the efficiency of methods for obtaining permanent joints are also given. Induction brazing is considered as an alternative method for obtaining permanent joints, namely, an inductor for soldering fittings and flanges. The calculations of the required power of the equipment, used for soldering the field connections of the equipment, have been made. As a result of the work, the authors calculated the main parameters of the inductor for soldering the flanges of the fittings and designed sets of inductors with a diameter of Dy
= 40 mm, Dy
= 50 mm, Dy
= 80 mm for soldering the flanges of the fittings.
Analysis of approaches for creating pipe connections in oil and gas equipment
Authors: Bashmur K A , Kukartsev V A , Tynchenko V S , Kravcova E G , Kuznetsov A V , Egorov A V 
Published: November 2021

Abstract
The article deals with the problem of connecting pipelines in the oil and gas industry. One of the connection methods is resistance welding. Often, the use of this approach shows muted efficiency as it depends on the qualifications of the welder. A technique for creating flange (plane) connections with a pipe in the oil and gas industry is considered. The necessary equipment and types of welds within the considered area are considered. Thus, it is necessary to conduct a literature-patent review to find an alternative method for creating welded joints in oil and gas pipelines in order to increase the reliability of such joints and reduce the cost of production. The analysis of the subject area and the search for possible solutions to the problem posed were carried out. Various welding methods (manual electric arc, automatic submerged-arc welding, induction brazing, etc.) are considered and a comparison of the main welding methods is given, as well as the rationale for the use of electron beam welding to create such pipe joints.
Study of gold-bearing ores material and mineralogical composition in Lower Angara region
Authors: Gron V A , Medved N V , Galayko A V , Gron M S 
Published: November 2021

Abstract
In connection with the involvement in new deposits exploitation, represented by refractory oxidized ores with a fine-dispersed phase and valuable component low content, there have been trends in the processing of this type of raw material. The alluvial gold-bearing sands of Lower Angara region are of practical interest. The results of the material and mineralogical composition of gold-bearing ores made it possible to establish that most rock fragments are quartz-mica schists, which are dilapidated by weathering up to 15% of the sample mass and clay inclusions. Ore by 61.5% is presented with grain size of more than 20 mm. Gold is distributed almost evenly by size class. Basically, gold is found in intergrowths with quartz, mica, pyrite, and clay components. The size of the gold grains ranges from 0.03 to 0.05 mm to several microns. The content of the valuable component was about 3-5%. The result of gravity concentration of the original ores showed the possibility of obtaining gravity concentrates with a metal content of 220-250 g/t, with extraction up to 93-95% and obtaining tailings from 0.3-0.5 g/t, followed by leaching of cyanide and sulfur-alkaline solutions. The extraction of the valuable component into the solution was 80% and 98%, respectively. The results obtained indicate the possibility of processing these types of ores in Lower Angara region.
Device for connecting elements of main oil and gas pipelines using electron beam welding
Authors: Kravcova E G , Kaizer Yu F , Tynchenko V S , Ch Mongush S , Katargin S N , Yu Vaitekunaite P 
Published: November 2021

Abstract
The article deals with the problem of connecting pipelines in the oil and gas industry. To improve the quality of welds on the oil pipeline, the article proposes an alternative method of welding and venting the beam into the atmosphere. This method includes a mobile installation for electron beam welding, in which, in manual mode, it is possible to adjust the seam speed, penetration depth, change the trajectory of the weld and the position of the installation relative to the pipe axis. Guns with a plasma cathode, which allow welding products in the atmosphere, are considered. The power of the generators is also calculated, and the generators are selected corresponding to the put forward requirements. In the course of the work, the authors are designing an electron beam welding unit, which in the future is planned to be developed as a mobile one. The mobile installation includes: a generator directing the belt to the pipe, a horizontal displacement motor, a welding positioner, an electron gun with a plasma cathode.
Experience in the application of the non-destructive method of acoustic emission in the production of titanium billets and products of transport engineering
Authors: Yu Remshev E , Olehver A I , Voinash S A , Sokolova V A , Ivanov A A , Malikov V N , Vagizov T N 
Published: November 2021

Abstract
The article discusses the issue of using the non-destructive method of acoustic emission at the stage of blank production. So, due to the violation of the heat treatment modes, various defects are formed in the starting material, which affects the operational properties of the finished products. To eliminate this problem, the stages of production of titanium blanks and products of transport engineering were studied, such as: heat and mechanical treatment, ultrasonic quality control, determination of the level of mechanical properties and control of the structure. In the course of the research, a method of acoustic emission control was developed and tested. The experiment on setting the locations of defects was carried out on ingots of VT22 titanium alloy during cooling. The reliability of the developed method is confirmed by the existing method of ultrasonic flaw detection. It has been established that this method can be effectively used to control workpieces and machined workpieces for the manufacture of particularly critical mirrors for searching for inhomogeneous inclusions and increasing the efficiency of the technological process by eliminating machining of VT1-0 titanium surfaces with inhomogeneous inclusions. In addition, this method can be used to search for defects commensurate with the grain size of the ingot, as well as significantly smaller sizes.