bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of machined wheel profile geometry on cutting force
Authors: Kanatnikov N V , Pashmentova A S , Radchenko S Y 
Published: June 2021

Abstract
The mechanisms based on standard geometry gears have reached their technological limits. To meet the needs of the market, it is necessary to meet new and new, often conflicting operational requirements. At the same time, it is necessary to reduce the mass of the node and increase the maximum torque, in addition, the noise level and increase the axial load must be reduced. To achieve the increasing requirements for the operational characteristics of mechanisms gears with specially designed tooth geometry are used. A tool for cutting such gears must be specially designed and manufactured for each new gear pair, given into account its design features. The introduction of a new tool in the technological processes of machining gear profiles leads to the fact that the surface quality decreases and tool wear increases. At present, the concept of this problem is scattered and composed of the experience of individual researchers. The work reveals the dependencies connecting physical phenomena accompanying the cutting process and the geometric parameters of the profile of the bevel gear. Based on the results of the project, it is possible to calculate the optimal profile parameters based on the technological parameters of the process.
Classification of mechanical engineering products at the stages of their life cycle
Authors: Bazrov B M 
Published: June 2021

Abstract
The article analyzes the classification of mechanical engineering products; it is shown that in the overwhelming majority of classifications, products are considered as objects of operation and there are practically no classifications of products as objects of production (except for the classification of parts) and objects of disposal, which negatively affects the efficiency of machine-building production. A methodological approach is proposed to construct a classification of products as objects of operation, items of production and disposal objects.
Model of analysis of the results of geometry scanning of turbine nozzles
Authors: Yu Pechenina E , Pechenin V A , Bolotov M A 
Published: June 2021

Abstract
The paper presents a mathematical model to perform computer calculation for open flow area of turbine nozzles. The model is used to work with objects in *.stl format when processing data after scanning. Using the developed model, calculations of the part quality parameters will not depend on the controller qualifications, and the proposed approach will not require unique adjustment, costly repair and storage of reference patterns for all sizes of nozzle devices. The calculation was performed in three sections, which improves accuracy while reducing labor intensity and cost of measurement. Increasing the number of sections practically does not affect the labor intensity of calculations, so there are no significant restrictions on performing virtual measurements in four or more sections. The model was implemented in the mathematical package MATLAB. The model was tested with the example of STL processing of the turbine nozzle blades sector.
Choosing a statistical method for predicting a quantitative indicator
Authors: Vlasov R G , Korobov Yu S 
Published: June 2021

Abstract
The aim of the study is to find a machine learning method that allows achieving the maximum accuracy of the forecast when training on a specific data set. The article provides a comparative overview of strategies for choosing the optimal machine learning method. The process of training sample preparation is considered, the necessity of its modification is justified. The search for the optimal machine learning method was carried out in the statistical computing environment “R” using the package “CARET”. The graphical results of training 96 algorithms that implement various statistical methods are presented, and the choice of the best one is justified on the basis of the proposed methodology.
The motor brake of a compressor type
Authors: Verbitsky Viktor V , Pogosyan Vladimir M 
Published: June 2021

Abstract
The accident rate in road transport remains very high and it is necessary to consider all the factors that affect this process to reduce it. In this regard, special attention should be paid to the process of long-term braking, the negative manifestations of which require the development of additional braking systems (retarding retarders) for vehicles operating in mountainous areas, primarily in the sphere of passenger transport. Transmission retarder brakes, which provide sufficient braking performance, have a number of disadvantages that hinder their use. The existing motor brakes-retarders show insufficient retardation and Kuban State Agrarian University conducted researches to improve their effectiveness. The compressor brake mode was experimentally studied after the theoretical analysis, in which an increased pressure was created in the inlet collector, and at the end of the compression stroke, the air from the cylinder was released through a special valve back into the system, which created the braking effect. The experiments have confirmed the possibility of a significant increase in the braking torque of the engine in the compressor brake mode, when both flaps are closed - the exhaust flap after the exhaust collector and the inlet collector before the carburetor, and compressed air is supplied to the inlet collector at different pressures. Then the braking torque increases in comparison with the engine braking more than 3 times.
Functional product map design in lifting and transportation machine building digitalization conditions
Authors: Prilutskaya M A , Murukina A D , Podoliak O O 
Published: June 2021

Abstract
In the Industry 4.0. mechanical engineering is undergoing major changes. Combining industry and digital technologies for the flexible and efficient production creating is a main idea of the Fourth Industrial Revolution. The article proposes a high-tech product functional map designing approach based on the author’s functions classification, taking into account the specifics of products designed within the Industry 4.0 framework. Based on the warehouse floor transport market trends study, as well as the forklifts consumers survey results, a functional map of a product designed at the Russian lifting and transport engineering enterprise was proposed.
Synthesis of the control loop for the coordinate of the horizontal plane of the quadcopter information-measuring and control system
Authors: Ba Phuong Dinh 
Published: June 2021

Abstract
The article discusses the translational motion of a quadcopter on a horizontal plane. Based on the analysis of this movement, a control loop for the horizontal plane coordinate of the information-measuring and control system of quadcopters was synthesized. The results obtained provide a stable flight of the quadcopter, a decrease in the influence of wind disturbances and monitoring of various objects when performing special tasks.
The study of the welding relief shape influence on the linear friction welding process
Authors: Gatiatullin I M , Galimov V R , Medvedev A U , Karetnikov D V 
Published: June 2021

Abstract
The study of the welding process of asymmetric parts made of Ti-6A1-4V alloy was made to expand the field of application of the process of linear friction welding and to improve the use of technology of existing assemblies. During of the study, it was found that the process of welding T-joints has features in a longer duration of the unsteady stage and an increase in the amplitude value of the shear force during the steady state. Welded joints do not contain seam flaws over the area of the welded joint, which it made unnecessary to assign an allowance along the perimeter of the welded section. The change in conditions at the joint is expressed in an increase in the microhardness of the welded seam in comparison with the Ti-6A1-4V joints, which are produced by the traditional technology more than 50 HV.
Automated control system functions for complex structured technological processes
Authors: Korneev A M , Smetannikova T A , Lavrukhina T V , Al-Saeedi F A 
Published: June 2021

Abstract
A system for determining the optimal technology and process control has been developed. The system provides identification of global and local technologies, flexible management of end-to-end technology with the issuance of appropriate recommendations about the further progress of the production process. The data obtained during the operation of the system is recorded by the report generation subsystem for further analysis. The developed system allows you to implement optimal process control, both at the level of an individual product and for a batch of products. The system provides the ability to adapt to changing production conditions. A procedure for selecting the most effective optimization method for managing local technology has been developed.
Machine learning in the development of regulators: the specifics of data preparation and the choice of the ML model algorithm
Authors: Staroverova N A , Shustrova M L , Fatykhov M Z 
Published: June 2021

Abstract
The article considers the stages of regulators development based on machine learning. Machine learning, like a fuzzy logic, is used in PID regulators in two ways: it is able to build the regulator or a unit for adjusting its coefficients. A feature of machine algorithms is the “learning” ability which allows you to transfer the experience of an expert to the system. The presence of a learning procedure distinguishes the configuration of regulators based on machine algorithms from the classical approach. The publication analyzed the possibility of using regression machine algorithms (models) of the Scikit-learn library (Python) to solve control problems using the example of a level regulator. The search for an effective data processing model led to the construction of ensemble algorithms based on stacking. The high degree of compliance between predicted and test data confirms the accuracy and stability of the results. The results presented in the article can be used in a simulating or in developing a controller based on a machine algorithm.
Model reproduction of non-equilibrium thermodynamics principles as a means to provide software self-development
Authors: Kol’chugina E A 
Published: June 2021

Abstract
Further evolution of technologies in material sciences, hardware and software demands reproduction of self-organization as a manifestation of non-equilibrium thermodynamics principles in new artificial environment. This is especially actual for software engineering, where reproduction of non-equilibrium thermodynamics principles will allow enhancing speed and quality of development process. In this article we reveal, list and analyze principles to be reproduced in artificial systems to provide capabilities for self-development, self-healing and self-improvement. It is shown that self-development process is impossible without reproducing the metaphor of electric charge with its abilities for attraction and repulsion. But this metaphor is usually avoided in computer models. We propose and consider a method to reproduce the metaphor of electric charge in computer models by means of UNIX/Linux operating system tools. The obtained results provide the basis to establish an artificial physics, a new research area dedicated to adequate reproduction of principles of physics in the artificial environment of computer models.
Hardware-software complex of a speech-like interference generator for speech information protection
Authors: Alekseev V V , Yakovlev A V , Moiseeva M V , Tikhomirova A A 
Published: June 2021

Abstract
The article describes a model of a speech-like interference generator based on a system analysis of ways to solve the problem of protecting speech information in office-type premises. The results of the effectiveness of the model application are presented.
Face recognition using multitasking cascading convolutional networks
Authors: Musikhin A G , Yu Burenin S 
Published: June 2021

Abstract
The face recognition has many applications in such areas like intelligent security and access control, biometrics, safeguard, verification, attendance accounting, machine vision, etc. Identification of a personality by the face has a number of advantages over other methods: the person does not need to be contacted physically, which is the most acceptable way for mass applications and no complicated or expensive equipment is required. This article discusses the problem of recognition and identification of a person’s face using convolutional neural networks that process frames from a camera in real time or from a recorded video file with the subsequent entry of the identified person into the database. Multitasking Cascade Convolutional Neural Network (MTCNN) has three convolutional networks (P-Net, R-Net, and O-Net) and is capable of outperforming many face detection tests while maintaining real-time performance. The proposed method for human face recognition was developed as a software product, tested and showed the probability of correct recognition in real time 96.02%.
Determination of natural gas content of coal
Authors: Kenetayeva A A , Usupayev Sh E , Zhurov V V , Rabatuly M , Baymuldin M K , Balniyazova G M 
Published: June 2021

Abstract
The main provisions of the laboratory work are as follows. Purpose - to determine the gas content of coal, which characterizes the actual gas content in coal, and is also the main parameter for predicting gas release into existing mine workings. The gas content is determined in laboratory conditions, and the gas pressure can be determined indirectly on the basis of sorption isotherms, which are characteristic of the corresponding different types of coal. Terms and Definitions. Gas bearing capacity, gas content is the volume of gas contained in the mass [m3/t] of coal. Depending on the composition of the gas, the gas content can be divided, for example, into methane content and carbon dioxide content. Since methane is the main constituent of gas in most cases, the term “gas content” is usually used to mean “methane content”. The value of gas content is usually taken in normal conditions (273 K and 1013.25 hPa).
Methods of improving the power supply reliability of industrial site
Authors: Khismatullin A S , Bashirov M G 
Published: June 2021

Abstract
Ensuring reliability is one of the most important problems in the creation and operation of any technical system. It is especially relevant for complex systems such as power supply systems. A modern industrial site from the power supply point of view is a complex technical system of hazardous industrial facilities, the technological processes continuity and safety of which directly depends on the power supply reliability. Electricity receivers of the considered industrial site in terms of power supply reliability belong to the second category. The task of ensuring the power supply reliability includes a whole range of technical, economic and organizational measures aimed at reducing damage from disruption of the electricity consumers’ normal operation. In addition, in modern market conditions, the power supply reliability is inextricably linked with the economic performance and industrial enterprises energy security. The paper proposes to modernize the industrial site power supply circuit, using the existing standby diesel power plant, which would automatically provide the industrial site power supply in automatic mode in case of disappearance, decrease, increase in voltage level, phase failure, and the phase sequence violation of the three-phase supply voltage on the busbar sections TP-1, TP-2 site. It is obvious that with the existing power supply scheme of the industrial site, the manual switching sequence, control over the backup diesel power plant operation, the normal power supply scheme restoration, it takes an average of 2.5 hours, which is not desirable, especially in winter. Therefore, it is necessary to introduce at the industrial site production control devices for the reserve automatic transfer, which ensure the power supply restoration to the industrial site in automatic mode.
Assessment of the contribution of phase transformations to the space-time distributions of the temperature of the filtering oil
Authors: Efimova G F , Levina T M 
Published: June 2021

Abstract
The solution of the problem of filtration of paraffinic oil by asymptotic methods in the form of endless sequence of boundary value problems for the expansion coefficients of the required solution in the Maclaurin series is obtained. Estimation formulas were used to calculate the space-time temperature distributions in the first approximation for the vibrational motion of viscous oil and the contribution of phase transformations of paraffin wax. The results can be used for theoretical substantiation and further development of thermal methods for influencing oil-bearing reservoirs, as well as for predicting temperature processes in the bottomhole zone.
Exploring of an open hammer die life with an expanding gutter using information technologies
Authors: Khaimovich I N , Elistratov D A 
Published: June 2021

Abstract
Currently, open dies with a parallel bridge are widely used. The design of such stamps is carried out according to proven methods. However, the dimensions of the bridges obtained do not always provide a sufficiently high durability of the dies. The decrease in the durability of the dies caused by the overestimated resistance of the bridge is especially noticeable in the manufacture of simple forgings that do not have complex cavities filled by extrusion. Thus, industries need more durable tooling that can provide a large number of stamped parts, as well as save money on the development, design and manufacture of a new stamp. To this end, in this paper, an analysis of the application of an expanding burr groove in a tool is considered. Practical experience of how the tooling is worn out with the number of stampings, the geometry of the tooling is measured, an analysis is carried out, and a mathematical model of the behavior of wear based on the experiment is presented. The same equation was obtained using Excel, which indicates that the mathematical model was obtained correctly. In addition, the paper considers the value of individual parameters of the tool geometry on the overall tool life.
Development of an automated information system to support computational procedures for scheduling
Authors: Lopateeva O N 
Published: June 2021

Abstract
One of the most important problems of the high-quality organization of the educational process in a higher educational institution is the task of forming a high-quality educational timetable. This task is the main one in the activities of the dispatching service of the university. A well-designed timetable should ensure an even workload of student groups and faculty in the next semester. Therefore, much attention is paid to researching and analyzing the operation of existing alternative means, formalizing and solving problems of optimal scheduling. In this paper, it is assumed that the problem of drawing up an effective university schedule can be effectively solved within the framework of an automated information system. The tasks of optimizing the curriculum at the University are being solved, which will help to take into account the current sanitary and epidemiological rules and norms through the introduction of the information system “University Schedule”. The paper presents diagrams of use cases and a diagram of the databases of the future system. The goal is to improve the level and quality of the preparation of the curriculum through the introduction of the system “University Schedule”. The software tool created as a result of the project will be used directly by the teachers who are the people responsible for scheduling.
Analysis of the state and prospects of application of the plasma sputtering method for obtaining wear-resistant coatings
Authors: Bondareva G I , Toigambayev S K , Tambovsky N M 
Published: June 2021

Abstract
The analysis of the properties of structural materials according to the wear resistance criterion is carried out. The prospects for the application of the plasma spraying method for obtaining wear-resistant coatings are given. Practice shows that methods of increasing the wear resistance of parts by applying on them thin coatings of ceramic, cermet and other highly wear-resistant materials by surfacing, vapor deposition, detonation and plasma spraying are very effective.
Switching strategies for a multi-level inverter
Authors: Moldakhmetov S S , Ivel V P , Gerasimova Y V , Petrov P A , Kaliaskarov N B 
Published: June 2021

Abstract
The article examines the methods of switching the stages of a multi-level inverter in order to reduce the harmonic factor of the output voltage of the inverter. These methods use pulse-width modulation for switching, which is obtained by comparing a reference sinusoidal signal and a sequence of triangular pulses. The article describes the algorithms for obtaining the control sequence of pulses and simulates each of the strategies. The dependence of the nonlinear distortion factor on the frequency of the carrier wave for different switching strategies is obtained based on the simulation results. The influence of the LPF on the quality of the output voltage of the inverter is also investigated. In addition, an experimental study of a six-level inverter was carried out. The waveforms and spectrograms of the inverter were obtained using the Fluke 434-II electrical energy analyzer. The harmonics of the output voltage, which are distinguished by power from the entire spectrum, were identified.
Investigation on pitting resistance of Sn-containing ferritic stainless steel with solution simulation method
Authors: Tan Yanliang , Sun Yangting , Lei Longlin , Liu Yuanyuan , Li Jin , Jiang Yiming 
Published: June 2021

Abstract
In this study, Sn2+ solution simulation method is used to investigate the effect of Sn on pitting corrosion behavior of tin-containing ferritic stainless steel 430LX. It is found that the correlation between Epit and [Sn2+] is opposite to the correlation between critical potential temperature (CPT) and [Sn2+]. After potentiostatic polarization at a specific potential, the correlations become the same. The CPT experiment after a series of potentiostatic steps proves that Sn2+ exhibits positive influence only when the pH and potential is within a certain range. All the complicated phenomena can be explained by the under-potential deposition mechanism. SnO2 passivation film that enhances the corrosion resistance is only produced when under-potential deposition occurs.