bluuebunny/crossref_metadata_2025_split huggingface dataset:
Innovative methods and technologies while examining equations of mathematical physics
Authors: Trofimets Elena 
Published: December 2022

Abstract
Teaching disciplines of physics and mathematics in the age of information technology requires innovative teaching methods application. These methods complement traditional forms; they are aimed at developing the systematic and creative thinking of students. The disciplines of the physical and mathematical profile include such discipline as “Equations of Mathematical Physics”. They help students develop skills in creating mathematical models of physical processes and phenomena. It is advisable to apply software packages to create computer models of situational problems when studying the discipline “Equations of Mathematical Physics”. The mathematical packages application makes it possible to take various situations by changing the input parameters of the model on the basis of computer models of physical processes. The problems of mathematical physics are based on the study of the second-order partial differential equations of three main types: hyperbolic, elliptic, and parabolic. The paper discusses the mathematical package MathCad application in the study of free and forced vibrations of a string. Mathematical models of free and forced oscillations are presented. The d’Alembert formula for solving equations of hyperbolic type is presented. The authors describe stages of the study of free vibrations of the membrane in MathCad. Bessel functions are constructed. Membrane surface animation has been created. Observations of membrane vibrations were carried out.
Creation and development of cyber-physical systems under condition of uncertainty interaction of subsystems
Authors: Korshunov Gennady I 
Published: December 2022

Abstract
The tasks of creation and development of cyber-physical systems are considered. Cybernetic and physical subsystems can be presented in digital and analog form. The physical subsystem that simulates nature is presented in an analog form. Physical subsystems and processes, both natural, in particular, and technogenic, can behave like “things in themselves.” Therefore, the processes of synchronization of analog processes with cybernetics are often difficult to formalize or are not performed correctly enough. This applies to both obvious cases in problem areas of ecology, mining, energy, and in computers under conditions of inappropriate behavior of programs, ensuring the reliability of testing. This leads to the emergence of uncertainties accompanying the integration of subsystems and control in the system as a whole. The nature of analog-to-digital and digital-to-analog conversion in the known representation requires taking into account the features at the level of this class of systems. These problems are considered at the levels of deterministic, stochastic and uncertainty. The well-known models of monitoring, control of a physical subsystem cannot be directly used for control. The development of correct control actions is considered from the standpoint of transforming such models. These models for dynamical systems are represented by differential equations. It is necessary to develop input-output models for the subsequent synthesis of controls.
Two approaches for modelling of digital technological innovation in achieving defect-free electronics production
Authors: Korshunov Gennady I 
Published: December 2022

Abstract
The issues of innovative development of high-tech industries are considered. The aim of this development is defect-free production. The achievement of the goal is due to the introduction of technological innovations within the framework of the concept of global technological changes, proposed by Carlotta Perez as a development of the theory of Kondratyev’s cycles. The article discusses the statistical and structural approaches for the implementation of technological innovation. A formalized representation of the formation and selection of functionally necessary and functionally sufficient structures is given. The above approaches are considered in relation to the processes of surface mounting of printed circuit boards. The elements of technology and the possibilities of their improvement in the context of digitalization of processes are considered.
On removal of one undetected paradox in foundations of probability theory
Authors: Iakovlev Serguei I 
Published: December 2022

Abstract
The paper points out a logical contradiction that arises in the modern approach to teaching the foundations of the probability theory. This contradiction is of the following form: 𝝎 = {𝝎}, where 𝝎 is an arbitrary elementary outcome. In modern mathematics the formation of expressions of the form 𝒙 = {𝒙} is unacceptable. Here {𝒙} is a unit set, i.e., a set whose sole element is some element 𝒙 of an arbitrary nature. This paradox 𝝎 = {𝝎} is a consequence of the fact that random events and between them also elementary outcomes 𝝎 are considered as some subsets in the set of all elementary outcomes. It is shown how this contradiction can be easily eliminated by applying the axiomatic method. It is based on the introduction of two simple axioms that impose restrictions on elementary outcomes and on the class of random events under consideration. In addition from these two axioms on the basis of strictly logical reasoning the authors derived the representation of an arbitrary random event in the form of a sum of elementary outcomes favorable to it. Moreover, another non-axiomatic approach to the elimination of this paradox is proposed. In the final part of the paper other variants of the second of the introduced axioms are considered as well.
Computational model of soldered details heating with considering the magnetic field distribution
Authors: Tynchenko Vadim S , Tynchenko Yadviga A , Rogova Daria V , Leonteva Anna A 
Published: December 2022

Abstract
The main purpose of the software application is to simulate the temperature field in the process of induction pack of elements of machine-building structures of the fuel profile, which will further improve the quality of connections. The program simulates the flange heating process during the induction brazing process. The purpose of the developed module is to provide experimental studies of the induction soldering process. The program provides graphic information during the technological process, provides the ability to adjust the technological parameters, and allows the development of the technological process.
Cyber-physical systems control principles and congregation of resources for a centralized and decentralized artificial intelligence
Authors: Gurjanov Andrey V , Babenkov Valery I , Zharinov Igor O , Zharinov Oleg O 
Published: December 2022

Abstract
The cyber-physical systems control task is being studied and their congregations based on artificial intelligence calculation resources. An artificial intelligence made with virtual environment including a digital regulator (control functions) and control object digital twins. An artificial intelligence is viewed as an independent control subject, which could be permitted to be placed in cyber-physical production computing resources (clouds) for a centralized or a decentralized cyber-physical production. There is a scheme and description given of a control system based on an artificial intelligence, which could be applied in practice to regulate horizontal chains of quasi-autonomous cyber-physical systems and production combines of factories being functioned in the Industry 4.0 infrastructural conditions.
Simulation modeling of gas exchange processes based on physical factors and effects with the implementation that uses big data analysis methods
Authors: Skovpin Nikolay , Parinov Maksim 
Published: December 2022

Abstract
The paper presents models that allow calculating and optimizing decompression parameters based on the physical description of gas exchange processes. The main feature of the work is the correction of the known tabular data not only based on the user’s decision, but also using physical models that describe a gas exchange in the body. This can significantly improve the quality of decompression planning. The result is achieved since the difference in decompression processes is primarily described not by physiological, but by physical factors. The work presents a detailed diagram of the modules included in it, describes the principles of their functioning. The following modules are described: a heat loss module, a gas exchange module, a module for optimization of decompression profiles, a microbubble corrections module, a decompression prediction module that calculates decompression risks based on a distributed analysis and data processing. The decompression risk prediction is based on the calculation of the critical safety level, for which a distributed analysis and data processing technique has been created. The implementation of this technique allows forming a detailed idea of the possibilities of its use in other subject areas.
Theoretical study of a new forging technology with additional macroshift using fem simulation in deform
Authors: Lezhnev Sergey , Panin Evgeniy , Stepankin Igor , Kuis Dmitry 
Published: December 2022

Abstract
In this paper the finite element method is used to simulate the process of forging round-section blanks in strikers of a new design. It is shown that the use of a radial joint of the faces has a positive influence on the hydrostatic pressure distribution along the entire length of the metal-tool contact. The comparative research of models with various values of flat zones inclination angles showed that the best variant is the tool with an angle value 30°. In this case a deep strain distribution over the cross section occurs in the billet with a significantly lower deformation force than when using tool with an angle value 0°. The simulation of the sequence of technological forging operations was also carried out. Two first compressions were performed with the workpiece turning at 90° to close possible internal defects. Then the angle of the turning is lowered to 45° and 30° in order to bring the cross-section shape closer to the round one.
Development of the compressor impeller configuration algorithm
Authors: Yu Pechenina Ekaterina , Pechenin Vadim A , Bolotov Michael A 
Published: December 2022

Abstract
The article addresses the improvement of compressor impeller configuration methods. One of the key parameters of compressor blade assembly quality is the uniform tension in the blade shroud joint. The authors have developed an algorithm for arranging the blades in the compressor impeller, which allows reducing the tension and ensures its uniform distribution. The algorithm kernel is based on a mathematical model developed for calculating shroud tension areas on the suction side and pressure side based on controlled deviations of the airfoil and shroud. The computed areas are used to sort the blades by the increasing tension area on the suction side and the decreasing one on the pressure side. At the final stage, the blades are arranged by their successive choice from among two rows and each next blade from the rows is installed in the casing, next to the pre-installed blades, with the change in the bypass direction. The algorithm is written in Python; 1,000 computing experiments were made to simulate the deviation of the parameters for 84 blades in the set. The algorithm function was compared to the arbitrary arrangement of the blades. As a result, the root-mean-square deviation of the originating tensions decreased from 0.54 mm2 to 132 mm2.
Processing of aerial photographs in geoinformation systems for constructing models of possible flooding zones in a flood-prone period
Authors: Trofimets Elena , Kochina Valeria , Zhebo Sergey , Chashin Alexander , Trofimets Valery 
Published: December 2022

Abstract
The natural and geological conditions of the Khabarovsk Territory determine the specificity of any region, characterized by the annual occurrence of spring mash phenomena, their gradual transition to the summer-autumn flood-hazardous period and the departure into winter with a high water level. Forecasting the scale of possible flooding of territories is the basis for early response of the forces and means of the Unified State System for the Prevention and Response of Emergency Situations (RSChS) The paper discusses the professional experience of specialists from the Crisis Management Center of the Main Directorate of the EMERCOM of Russia for the Khabarovsk Territory in preparing models of possible flooding of settlements applying the QGIS geographic information system during the flood-prone period of 2021 in the Khabarovsk Territory. The authors identify peculiarities of the unmanned aerial vehicles used to predict areas of possible flooding such as the need for early aerial photography of human settlements; dependence of the quality of orthophotomaps on the experience of specialists performing aerial photography; variability of coastline relief; dependence on weather conditions; short period, favorable for aerial photography; inaccessibility of settlements; location of settlements in the border area. The matching of models obtained with the help of QGIS with the actual situation developed during the 2021 flood crest was identified. Also, some peculiarities and disadvantages were defined despite the positive experience of forecasting by modeling flood zones (flooding).
Non-destructive testing operations simulation in virtual reality environment
Authors: Kovshov Evgeny E , Kuvshinnikov Vladimir S 
Published: December 2022

Abstract
This article considers the prerequisites for creating virtual educational simulators for non-destructive testing teaching. Currently, virtual reality technologies are most widely used in the training process of engineers and workers directly engaged in production during complex and responsible operations, including the control of products and materials. Approaches to the creation and application of virtual reality in the development and use of a digital radiography simulator for non-destructive testing of materials and products are announced. It is noted that the developed software and algorithmic solutions allow to judge their effective applicability in industry as the results of R&D and various computational experiments. Constructing and processing images technology of digital twins’ samples, which allows to obtain image close to the results of metal samples’ X-ray film is considered. Basic physical principles underlying the developing of a digital model are formalized. The results of obtaining digital X-ray images are presented. Prospects for expanding the applicability range of virtual reality software and hardware solutions in non-destructive testing educational process are touched upon.
Improvement of the process of control of the geometric characteristics of assembly parts with spatially complex surfaces
Authors: Matsur German , Mironenko Vladislav , Savelyeva Anastasia , Votyakov Kirill , Karabontseva Nadezhda 
Published: December 2022

Abstract
Significant improvements have been made to measurement systems to meet changing market requirements. Such a rapid change and development of measuring technology is primarily due to the requirements for accuracy and accuracy in aerospace and other manufacturing industries. Coordinate-measuring machines (CMM) gave a new impetus in the field of geometric and dimensional metrology. CMM in the industrial environment has become an important resource for quality systems, monitoring production processes, reducing errors in the production process, checking product specifications and constantly improving quality. Although modern CMMs can better meet the needs of rapidly growing customer requirements, there are still many opportunities to improve and develop CMM. The globalization of production has led to the development of many complex products and the automation of mechanical components. Therefore, there is a need to develop a technique for controlling the thickness of the residual web for parts with geometrically complex surfaces. Using the creation of measurement map templates in the CAD system, scanning scans in the standard laser tracker software, as well as creating appropriate leaders with subsequent loading into the CAD system.
Modeling the contact curves of leather squeezing machines
Authors: Khurramov Sh R , Khalturaev F S , Kurbanova F Z 
Published: December 2022

Abstract
The article is devoted to the analytical description of contact curves leather squeezing machines. The expressions for the ratio of strain rates during roller squeezing of the skin are determined when the deformation of the leather and the cloth is given as a power function. It has been established that changes in skin moisture during the squeezing process do not affect the model of contact curves when the deformation of the skin and cloth are given by power functions.
Method of preparation of heterogeneous height standards for measurements by means of interferometry
Authors: Antsyferov S S , Maslov V G , Rusanov K E , Fazilova K N 
Published: December 2022

Abstract
The results of the practical implementation of a method for preparing calibration standards based on magnetron sputtering of a chromium film on the surface of the standard are presented. This film is an electrically conductive layer that preserves the topography of relief elements and allows scanning without charge accumulation in the sample. The results obtained showed that the sputtering of thin chromium films on the surface of height standards, the relief elements of which have different reflection coefficients, makes it possible to measure the heights of such standards with a fairly low error.
The use of digital intelligent technologies in predicting failures of automotive and tractor equipment
Authors: Dorokhov A S , Kataev Yu V , Tishaninov I A , Gradov E A 
Published: December 2022

Abstract
The paper provides information on the causes of failures in automotive equipment and shows the ways to determine failures using digital technologies introduced into the diagnostic process. The implementation of forecasting as a separate stage in the process of diagnosing automotive equipment using machine learning technologies in the form of neural networks is analyzed. The results of the study reflect that the neural network while analyzing a huge amount of data received during remote diagnostics is able to more reliably predict failures of automotive equipment.
Automatic control of reactive power compensation using a solid state voltage relays
Authors: Kh Abduraimov E 
Published: December 2022

Abstract
The article discusses the issues of research & innovation of a gadget for automatic reactive power compensation, for automatic control of power supply system operating modes, based on the developed non-contact a solid state voltage relay with an adjustable return coefficient, which is shows its transience by the required strength and speed of action, including a part that reacts to changes in electrical parameters and high power executive body. A diagram with descriptions of the principle of operation, experimental characteristics and oscillograms are given. The invented device is proposed for application in reactive energy compensating devices of power supply systems as an automated power regulator of capacitive installations depending on voltage.
Invention of a contactless voltage relay with an adjustable reset ratio
Authors: Kh Abduraimov E , Kh Khalmanov D 
Published: December 2022

Abstract
The purpose of this article is to apply the relay effect observed in semiconductor circuits to create a contactless relay voltage with an adjustable return coefficient, connected in one device sensitivity to the input voltage and switching of powerful loads to high currents. A dynamic circuit is investigated, consisting of an adjustable semiconductor, in series with a parallel circuit of a capacitor and a resistor, which is one of the parts of the proposed relay device with a sinusoidal frequency of voltage fluctuations on the load. To study the operating modes and analyze the device circuits, it is recommended to use numerical methods using computer technology.The principle of operation and experimental characteristics of the developed device are presented.
Optimization of the radial bearing geometry by the dimensional analysis
Authors: Khakimzyanov Rustam R , Mashtakov Alexander P , Mickiewicz Vadim G 
Published: December 2022

Abstract
In order to improve the working capacity and life of bearing units, the dimensional analysis of the inner geometry of a cylindrical radial bearing was carried out. The assembly component, composed by the outer diameter dimensions of the raceway of the inner race, the inner diameter of the outer race and the two diameters of the rollers, was considered as a dimension chain. It is recommended, in order to reduce wear and friction losses, to produce the diametrical dimensions of the roller according to the fifth accuracy degree. It is established that the cause of the axial clearance between the roller and the double-flanged race is the distance between the contact points on the right and left flanges with the horizontal position of the roller, as well as the diagonal distance. Tolerances for ring dimensions, for such a combination, are recommended to accept with respect to accuracy degree 6.
Justification of the use of wear-out digital micrometer in repair production
Authors: Leonov O A , Zh Shkaruba N , Temasova G N , Vergazova Yu G 
Published: December 2022

Abstract
Issues related to the evaluation of the results of direct multiple measurements with a worn digital micrometer have considered. It had determined that the total error of the device used in operation exceeds the limit of permissible error indicated in the passport by 1.25 times and is equal to 5 μm. But in the field of control of parts in repair production, the passage of mandatory verification by measuring instruments is not required, and the calibration operation is advisory in nature. Based on the obtained value, we can conclude that the device can be used to measure the dimensions of parts with a tolerance of at least 15 µm.
Research of the stable equilibrium position of a dissipative system
Authors: Opalikhina O V , Zhelavskiy M A 
Published: December 2022

Abstract
The article deals with the issue of checking the stability of a trivial solution of a fourth-order differential equation describing a dissipative feedback system. Systems with feedback have found wide use in automatic control devices and robotic complexes. The article presents an algorithm for quickly calculating the stability of the system according to the Lienard-Chipart criterion, supplemented by solving the inequality that determines the permissible values of the controlled parameters and constructing a curve of a D-partitions. Comparative analysis of Routh-Hurwitz’s and Lienard-Chipart’s stability criterions is given. The nature of the change in the kinematic characteristics of the control object under different positioning modes is investigated. The balancing simulation of studied object’s control surfaces is carried out in the Wolfram Mathematica computer environment. The program codes for evaluating the stability of the feedback system are written in C++.