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The use of modeling in the teaching of geometry and graphic disciplines at the University 2

The use of modeling in the teaching of geometry and graphic ...

2nd International Scientific and Practical Conference on Information Technologies and Intelligent Decision Making Systems, ITIDMS 2021

作者： Vanshina, Ekaterina A. Shevchenko, Olga N. Malikova, Olga N. Staselko, Oksana L. Shusharina, Irina V. Associate Professor of Department of Descriptive Geometry Engineering and Computer Graphics FSBEI Orenburg State University Pobedy Ave. 13 Orenburg460018 Russia Department of Descriptive Geometry Graphics FSBEIHE Industrial University of Tyumen UL. Lunacharskogo 2 Tyumen625001 Russia

1. Introduction: In connection with the introduction of new Federal state educational standards of higher education (FSES) to teachers of geometry graphic departments there was a problem with the revision of the contents and methodology of teaching disciplines "descriptive geometry", "engineering and computer graphics", foundations of engineering education aimed at formation of basic knowledge for studying of the subsequent disciplines used graphic representation of information. The analysis of special literature has indicated that, despite the significant number of scientific publications on the research topic, the use of modeling in teaching geometric-graphic disciplines requires separate research. 2. Materials and methods: Study and analysis of scientific, educational and special literature on the research topic, comparison, systematization, synthesis, generalization. 3. Results: To implement modern teaching methods in the educational process in the geometric-graphic disciplines, the author applied the functionality of the system KOMPAS-3D and developed by: electronic slides based on the modeling included in the evaluation funds for engineering and computer graphics;set a clear three-dimensional (3D) models of twenty-assemblies products intended for assignments on practical and laboratory lessons on the computer in the system KOMPAS-3D to create an Assembly and working drawings;set of individual tasks designed to practical assignments on the computer in this system to create 2D-models of assemblies (Assembly drawings) and 2D models details (working drawings), associated with their three-dimensional models. 4. Discussion and Conclusions: Design and creation of didactic materials based on three-dimensional and flat modeling tools, methods and algorithms of computer graphics in the system KOMPAS-3D, their use in teaching geometric-graphic disciplines, the inclusion in the evaluation funds on descriptive geometry, engineering and computer graphics, contributes to the

关键词： geometry

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Investigation of Microclimate Parameters in the Industrial Environments

Lecture Notes on Data Engineering and Communications Technol...

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Lecture Notes on Data engineering and Communications Technologies 2023年 180卷 448-457页

作者： Liaskovska, Solomiya Gumen, Olena Martyn, Yevgen Zhelykh, Vasyl Department of Artificial Intelligence Lviv Polytechnic National University Kniazia Romana Street 5 Lviv79905 Ukraine Department of Descriptive Geometry Engineering and Computer Graphics Peremohy pr National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" 37 Kyiv03056 Ukraine Department of Project Management Information Technologies and Telecommunications Lviv State University of Life Safety Kleparivska Street 35 Lviv79007 Ukraine Department of Heat and Gas Supply and Ventilation St. Bandery Lviv Polytechnic National University 12 Lviv13 79013 Ukraine

Researches on the organization and implementation of the project management of selection processes and the development of adequate models of interaction of many parameters of the microclimate of the technological process of raising the poultry meat breeds in industrial premises have been carried out. Actuality of the researches has been confirmed, the analysis and a choice of interaction of parameters research methods are proved. It is shown that the use of physical modeling with the involvement of the corresponding experimental equipment and the use of the experimental results obtained for geometric modeling on the basis of applied multidimensional geometry are effective. The significance of the study is in the established features of the nature of the heat exchange of air in the premises in view of the effectiveness of growing products and in various types of farming. The method of measuring the temperature in the room chosen in the process of geometric modeling allows to cover with lines of the same temperature all points of the living space of the production premises in which the bird is *** proposed method of research can be practically adapted for the processing of the results of studies on the microclimate parameters of agro-industrial objects of various intended uses. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.

关键词： Project management

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Improving efficiency energy systems-photovoltaic modules and solar collectors in construction 3

Improving efficiency energy systems-photovoltaic modules and...

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3rd IEEE KhPI Week on Advanced Technology, KhPI Week 2022

作者： Martynov, Viacheslav Ploskyi, Vitalii Sergeychuk, Oleg Virchenko, Gennadii Usenko, Valery Tereschuk, Mykola Kyiv National University of Construction and Architecture Department of Architectural Constructions Kyiv03037 Ukraine National Technical University of Ukraine «igor Sikorsky Kyiv Polytechnic Institute» Department of Descriptive Geometry Engineering and Computer Graphics Kyiv03056 Ukraine National University «yuri Kondratyuk Poltava Polytechnic» Department of Construction and Civil Engineering Poltava36040 Ukraine

ISBN: (数字)9798350399202

ISBN: (纸本)9798350399202

A method is proposed for increasing the efficiency of using energy systems (photovoltaic modules, solar collectors) due to the optimal location on the building envelope. A mathematical and graphical model has been developed, the Gelioopt program has been developed to determine the optimal orientation and area parameters for photovoltaic modules. A method is proposed for a quick graphical determination of the amount of converted solar energy by photovoltaic modules, and solar collectors, depending on the spatial orientation of solar receivers using building drawings. The proposed developments make it possible to simplify the calculation procedure and increase the determining of optimal parameters speed for solar receivers and is a proposed new type of geometric models. © 2022 IEEE.

关键词： Solar power generation

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Investigation of Industrial Bearing Fault Diagnosis Based on 1D-Cnn-Lstm

Investigation of Industrial Bearing Fault Diagnosis Based on...

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International Conference on Industrial engineering, Applications and Manufacturing (ICIEAM)

作者： Eduard Muratbakeev Diana Novak Yuriy Kozhubaev Department of Descriptive Geometry and Graphics Empress Catherine II Saint Petersburg Mining University Saint Petersburg Russia Department of Informatics and Computer Technologies Empress Catherine II Saint Petersburg Mining University Saint Petersburg Russia Department of Electrical Power Engineering and Electromechanics Empress Catherine II Saint Petersburg Mining University Saint Petersburg Russia

ISBN: (数字)9798331512194

ISBN: (纸本)9798331512200

This paper investigates a hybrid model method based on one-dimensional convolutional neural network (1DCNN) and long short-term memory (LSTM) network for fault diagnosis of industrial bearings. Based on a bearing dataset provided by Southeastern University, feature extraction and fault classification based on vibration signal data under different operating conditions were performed. The 1D-CNN module extracts local features from the signal in the time domain, while the LSTM module additionally captures the time dependence of the signal to improve the accuracy of fault diagnosis. Experimental results show that the model can effectively distinguish different types of bearing faults, exhibits good classification performance on the test set, and is highly robust to noise. This method provides an effective deep learning-based solution for industrial bearing fault diagnosis and has good application prospects.

关键词： Fault diagnosis Vibrations Training Accuracy Memory management Feature extraction Data models Stability analysis Convolutional neural networks Long short term memory

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Fault Diagnosis of Mining Machine Gearboxes Based on Continuous Wavelet Transform and Machine Learning

Fault Diagnosis of Mining Machine Gearboxes Based on Continu...

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International Conference on Industrial engineering, Applications and Manufacturing (ICIEAM)

作者： Eduard Muratbakeev Yuriy Kozhubaev Cheng Haodong Department of Descriptive Geometry and Graphics Empress Catherine II Saint Petersburg Mining University Saint Petersburg Russian Federation Department of Electrical Power Engineering and Electromechanics Empress Catherine II Saint Petersburg Mining University Saint Petersburg Russian Federation Institute of Computer Science and Cybersecurity Peter the Great St. Petersburg Polytechnic University Saint Petersburg Russian Federation

ISBN: (数字)9798331512194

ISBN: (纸本)9798331512200

This paper proposes a gearbox fault diagnosis method based on CWT-CNNN-LSTM. Continuous wavelet transform (CWT) transforms the original 1D vibration signal into a 2D time-frequency diagram with richer fault feature information. The 2D time-frequency diagram is then input into the convolution layer to complete the automatic feature extraction, and then the extracted features are input into the LSTM model for fault classification. After verification by the gearbox dataset published by Southeast University of China, this method can identify the fault type and load transformation of the gearbox with high accuracy, which has certain practical significance. With the acceleration of the intelligentization and automation of coal mines, motors and gearboxes are indispensable equipment in coal production, and the stability of their operating status is directly related to the safety and efficiency of coal production. However, as one of the common industrial equipment, the gearbox is more likely to fail due to various reasons during long-term operation compared to the motor. Once such a failure occurs, if it is not discovered and handled in time, it will cause damage to the mining equipment, thus affecting the entire coal mining process. Therefore, real-time fault prediction of gearboxes has important practical significance.

关键词： Fault diagnosis Vibrations Time-frequency analysis Continuous wavelet transforms Accuracy Production Feature extraction Motors Convolutional neural networks Long short term memory

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On the Wear Intensity Ratio of a Striker under Dynamic and Static Conditions

On the Wear Intensity Ratio of a Striker under Dynamic and S...

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2019 International Science and Technology Conference on Earth Science, ISTCEarthScience 2019

作者： Bolobov, V. Chupin, S. Binh, Le Thanh Department of Mechanical Engineering Saint Petersburg Mining University Saint Petersburg Russia Department of Descriptive Geometry and Engineering Graphics Saint Petersburg Mining University Saint Petersburg Russia

The results of experiments on determination of the cylindrical part mass loss of the cone-shaped strikers made of 38XM (AISI P20), 8 (AISI W1-A), and X12MFA (AISI D2) steels, which have been subjected to heat treatment applied by the striking tools manufacturers, and additional cold treatment, with their friction and abrasive wear on granite, are presented. It was found that the strikers made of steel X12MFA with all types of heat treatment show the greatest wear resistance under the wear conditions (static conditions), while the strikers made of 38XM have the lowest wear resistance. Cryogenic treatment and, to a lesser extent, cold treatment increase the wear resistance of all materials. The comparison of set values of wear resistance I st and hardness HV of the strikers, as well as the analysis of their microstructure allows to conclude that wear resistance of a tool depends not only on its hardness, but also on the type, volume, shape of carbides forming the structure of material used for tool manufacturing. For this reason, after the cryogenic treatment, the tool made of X12MFA steel shows the greatest wear resistance, because its material has the highest content of carbon (∼1.5%) and alloying elements (∼13%), which provides up to 10.8% increase in the number of fine carbide particles in its structure, that ensure wear resistance increase, after the cold treatment. The results obtained for I st are compared with the earlier obtained data on wear resistance of the same striker at striking upon granite (in dynamic conditions). The conclusion about similarity of the wear mechanisms of the analyzed strikers in dynamic and static conditions is made. © Published under licence by IOP Publishing Ltd.

关键词： Wear resistance

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Modeling of Influence of Shupe Effect on Fiber-Optic Goniometer with different coil winding types 3

Modeling of Influence of Shupe Effect on Fiber-Optic Goniome...

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3rd IEEE KhPI Week on Advanced Technology, KhPI Week 2022

作者： Ivanov, Sergiy Oliinyk, Pavlo Virchenko, Gennadii Vanin, Volodymyr Tereschuk, Mykola Research and Development Institute of Telecommunications National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute' Kyiv Ukraine National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute' Department of Descriptive Geometry Engineering and Computer Graphics Kyiv Ukraine National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute' Faculty of Physics and Mathematics Kyiv Ukraine Kyiv National University of Construction and Architecture Department of Architectural Constructions Kyiv Ukraine

ISBN: (数字)9798350399202

ISBN: (纸本)9798350399202

One of key errors of the classic interference-type fiber-optic goniometer is the thermo-optical zero shift. Its caused by the non-uniform change of temperature of different fiber sections in the loop under the influence of temperature;as a result of that, counter-rotating waves get different phase incursions during stretching of fiber in the loop, thus creating thermo-optical zero shift (Shupe effect). Difference of the phase incursions of counter-rotating waves is the bigger the higher speed of fiber length change is, and the higher difference of delay time of those waves. The current study is focused on the modeling of influence of the Shupe effect on on the precision of the fiber optic goniometer. The key features of the goniometer mentioned are use of the copper coil carcass and compound with high thermal conductivity (use of nanotubes is desired). Different coil winding types (simple, dipole quadrupole, modified quadrupole, bifilar, octupole) are considered from the point of view of minimizing the thermo-optical zero shift under self-heating and influence of the ambient temperature changes. Analysis is based on the transient thermal analysis of finite element model of the goniometer performed in ANSYS environment with subsequent data import and integration of phase incursion, calculated based on temperature data, along the fiber length. Study results show that best results during self-heating gives the use of quadrupole winding, at that goniometer's zero shift changes insignificantly (about 0.08°, compared to 1,35° for the simple winding). Change of ambient temperature for a given design has almost no influence on the zero shift, as device is heated uniformly. One should note that as during modeling not all factors could be taken into account, the result obtained should be checked and qualified during FOG tests. © 2022 IEEE.

关键词： 3D modeling

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Study of Thermomechanical Behavior of Electrically Conductive Tubular Elements During Magnetic Impulse Processing

Study of Thermomechanical Behavior of Electrically Conductiv...

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International Conference on Perspective Technologies and Methods in MEMS Design (MEMSTECH)

作者： Roman Musii Nataliya Melnyk Veronika Dmytruk Inga Svidrak Beata Kushka Hanna Shayner Department of Mathematics Lviv Polytechnic National University Lviv Ukraine Department of Software Lviv Polytechnic National University Lviv Ukraine Department of Applied Mathematics Lviv Polytechnic National University Lviv Ukraine Department of Descriptive Geometry and Engineering Graphics Lviv Polytechnic National University Department of Foreign Languages Lviv Polytechnic National University Lviv Ukraine

ISBN: (纸本)9798350396812

The mathematical model of the thermo-stressed state of an electrically conductive tubular element influenced by a nonstationary electromagnetic field of impulse type has been proposed. The initial boundary value problems are formulated, and their general solutions are obtained for the key functions, which are the axisymmetric terms of the vector of magnetic field strength, the radial component of the displacement vector, and the temperature. A numerical study of the thermo-mechanical behavior of the considered element influenced by the action of an electromagnetic impulse is performed.

关键词： Micromechanical devices Magnetoelasticity Electromagnetic interference Thermomechanical processes Force Behavioral sciences Steel

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Application of binary classification of magnetic resonance therapy images to detect the threat of the disease due to COVID-19 3

Application of binary classification of magnetic resonance t...

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3rd IEEE KhPI Week on Advanced Technology, KhPI Week 2022

作者： Zalevska, Olga Vanin, Volodymyr Sydogenko, Julia Finogenov, Oleksii Demydenko, Olga Yablonskyi, Petro Ladogubets, Tetyana Oliinyk, Yurii Miroshnichenko, Ivan National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute' Department of Automation of Power Processes and Systems Engineering Kyiv Ukraine National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute' Department of Descriptive Geometry Engineering and Computer Graphics Kyiv Ukraine National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute' Department of Computer-Aided Science and Data Processing Systems Kyiv Ukraine National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute' The Department of Theory Practice and Translation of English Kyiv Ukraine National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute' Deprtament of Applied Mathematics Kyiv Ukraine

ISBN: (数字)9798350399202

ISBN: (纸本)9798350399202

The paper considers the use of a neural network for the binary classification of magnetic resonance imaging images to establish a possible disease of COVID-19. Processing of input data and their reduction to one format is provided, and neural network software for binary classification is developed and its training based on about 60,000 open patient images. The using of developed software is universal for medical doctors or ordinary Internet users and does not require additional training. © 2022 IEEE.

关键词： Magnetic resonance imaging

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Directions for Improving the Efficiency of Forest Clear Cutting on the Territories of Reservoirs and Waterworks under Construction 5

Directions for Improving the Efficiency of Forest Clear Cutt...

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5th Pan-Russian Scientific Technical Conference on Forests of Russia: Policy, Industry, Science and Education, FR 2020

作者： Kalyashov, V. Iliin, A. Shuvalova, S. Leonova, O. Shvetsova, V. Department of Descriptive Geometry and Engineering Graphics Saint Petersburg State University of Architecture and Civil Engineering 4 2nd Krasnoarmeiskaya Street Saint Petersburg190005 Russia Department of Water Energy and Ecological Feasibility JSC Lenhydroproject Ispitateley prospect 22 Saint Petersburg197227 Russia

The article deals with the issues of increasing the forest resources use extent on the forested areas of reservoirs' flooded territories of hydroelectric power stations (HPPs) - both projected and under construction- in multi-forest areas of the Russian Federation. The necessity of forest clear cutting and forest clearing carrying out on flooded territories and the importance of these measures for ensuring favorable environmental conditions in the area of hydro construction and in the water area of reservoirs are substantiated. The estimation of the wood volume cut in the process of reservoirs creation is presented and the reasons for leaving wood to be flooded are considered. The factors and circumstances that affect the indicators of economic efficiency of forest clear cutting are described. A comparative assessment of the applied technologies of forest clear cutting is made, ways to increase its profitability are outlined, and the impact of profitability on decision making on leaving wood to be flooded in the process of reservoirs' territory preparation is estimated. © Published under licence by IOP Publishing Ltd.

关键词： Reservoirs (water)

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