Dissertations / Theses on the topic 'Моделювання фізичне'
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Козлов, Я. Р. "Дослідження властивостей напружень в рухомій рідині." Master's thesis, Сумський державний університет, 2020. https://essuir.sumdu.edu.ua/handle/123456789/82136.
Full textЄвсеєнко, Олег Миколайович. "Моделі та методи енергозберігаючого керування розподіленими тепловими об'єктами з використанням систем з прогнозуючим фільтром." Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/33815.
Full textThesis for granting the Degree of Candidate of Technical sciences (PhD degree) in specialty 05.13.03 «Management systems and processes» (151 – Automation and computer-integrated technologies) National Technical University «Kharkiv Polytechnic Institute» of Ministry of Education and Science of Ukraine, Kharkiv, 2018. The thesis is devoted to the analysis of distributed thermal objects control using prediction systems to determine their disadvantages and development of new energy-efficient heat control methods for administrative and office buildings. The problems of thermal objects energy-saving control development are considered. Distributed thermal objects are analyzed. The author suggests a classification of thermal objects according to the number of used energy sources, structure, working mode of the heating equipment. Existing synthesis methods of control systems for distributed thermal objects and thermal energy control systems are investigated. The main factors affecting temperature in premises are considered. The regulators with prediction are analyzed. The existing tendencies in the development of energy saving control methods applied in heat supply systems are explored. It has been found that existing temperature controllers with prediction maintain temperature in the premises in the range from +19 °C to +22 °C with accuracy ± 1 °C. It has also been demonstrated that regulators based on weather-dependent, PID-, on–off control laws reduce energy consumption by 15%, using regulators with prediction reduces power consumption by 25-35%. Perspective of energy-saving methods control of distributed thermal objects with prediction is substantiated. The author has carried out an analysis of the behavior and properties of distributed thermal control objects. The requirements for the synthesis of energy-saving thermal objects control laws are formulated. Feasible region, initial and boundary conditions at the initial stage of research, modeling of the object for finding an effective solution have been determined. Prerequisites and constraints for the development of methods of energy saving management are theoretically justified. A classification of distributed thermal objects regulators, depending on the ratio of the transport delay time to the time of transient processes, has been carried out. The author developed an algorithm for solving the problem of calculation the heat distribution inside an office premises. A model of the room in the ANSYS environment is created. The method of dividing the structure of the premises into n objects with lumped parameters with the same properties of space is developed. The basic problems of distributed thermal objects control are considered. The control method of thermal object with distributed parameters using a step function have been further developed. Formulas that allow to refuse from an object with lumped parameters control to an object with distributed parameters control has been developed. The author developed a method of thermal object with distributed parameters control using pulse-width modulation with prediction filter, where the target function vector is formed from the control error at the current time and the predicted mismatch error, that is defined as the difference between the given temperature and the temperature of the regulator model. A microcontroller system of heat supply control, that consists of a subsystem of getting information, a subsystem of issuing control influence, central controller and control panel have been developed. It has been established that in order to identify the refusal of the subsystem of information gathering and the issuance of controlling influence, they must be closed in the circle. The algorithms of diagnosing the data linesї efficiency, controlling the temperature of the object and recording the transient characteristics of the control object are developed. It is established that the implementation of control influence in the form of a stepped function can be carried out with the help of a parallel connection of heaters of various power. It is suggested to control the temperature of a thermal object with pulse-width modulation, in which the control element operates in key mode due to the disadvantages of implementing a control effect in the form of a stepped function. On the basis of measurements on a real object, a complete three-dimensional model of the room taking into account external contours and exact internal geometry was constructed. Volumetric netting of hexahedrons was built. Boundary conditions taking into account the heating system, ventilation system, heat conductivity of walls, the temperature of the outside air were specified. Transient curves of influence on the room of external temperature, ventilation with air temperature equal to 20 °C, a 1.75 kW power heater temperature were obtained. A program macro (udf file) on C language in the ANSYS environment for the experiment was created. The conditions for the simulation: the external temperature varies from minus 7 °C to plus 5 °C, depending on the time of day, the initial air temperature in the room +18 °C, the speed of intake and exhaust ventilation 0.018 kg/s, the temperature of the intake ventilation + 20 °C were specified. An experiment to maintain a setting daily temperature mode in the room: from 00:00 to 08:00 + 10 °С, from 9:00 to 17:00 + 18 °С, from 18:00 to 00:00 + 15 ° С was conducted. Method of PWM regulation with prediction to the most common: twoposition regulation with hysteresis ± 2 ° C, two-position regulation without hysteresis and PID-regulation were compared. According to the simulation results, the PWM control with prediction the highest accuracy was exhibited. The least effective method was two-position regulation with hysteresis equal to ± 2 °C, which due to the inertia of the thermal object exceeded the given temperature in the room. The total time of the heater operation during the day is obtained. The methods of temperature control with the PID regulation and PWM with prediction control roughly the same time of operation of the heater (39.89% vs. 39.24%) were showed. According to the monthly cost of 1 kW of electricity, the total operating time of t he heater, heater power for the heating costs for rooms with one-shift operating mode without a weekend for day and month modes were calculated. It has been established that the refusal of continuous operation of the heater and using regulator with prediction will reduce the operating time of the heating equipment by 56%: from 24 to 10.5 h. According to the simulation results, the temperature modes of the premises that give the source information in which points of the room it is necessary to place the temperature sensors are obtained. For experimental studies, a hollow steel rod with dimensions: length 35.5 cm, outer diameter 3.2 cm, internal diameter 2.8 cm, wound on one end with a heater length of 8.2 cm from the beginning of the tube with a resistance of 19 Ohms, and sterilizer GP-80 were selected. For a real experiment, an experimental installation based on the ATMega16 microcontroller, sensors DS18B20, microchip memory AT24C256B-PU was used. A program of the object temperature control on the ATMega16 microcontroller is written. For each of the selected control objects transition curves were obtained and experiments of maintaining the specified temperature conditions were carried out. The correctness of the theoretical prerequisites for the development of the hardware and software complex was confirmed by the results of the research. The problem of finding the optimal ratio of heater power parameters and forecasting interval using the least squares method is solved. It was found that to reduce the control error, the control impulse pulse should be made at the beginning of the program control interval, taking into account the amount of overshoot. The results of scientific research were introduced into the practice of designing systems for automatic control of thermal objects, technological processes of the enterprise VO OWEN (Kharkiv). The materials of the dissertation are used in lecture courses "Theory of automatic control" and "Software tools of control systems" at the department automation and control systems NTU "KhPI".
Євсеєнко, Олег Миколайович. "Моделі та методи енергозберігаючого керування розподіленими тепловими об'єктами з використанням систем з прогнозуючим фільтром." Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/33812.
Full textThe thesis on Candidate Degree in Technical Sciences: Specialty 05.13.03 – management systems and processes. – National Technical University «Kharkov Polytechnic Institute», Kharkov, 2018. The thesis is devoted to the development and improvement of energy-efficient control methods of distributed thermal objects for using in heat supply systems. The thesis proposes a control method of thermal objects with distributed parameters with prediction filter, where the PWM signal is used as the control action. The method of controlling thermal objects with distributed parameters with prediction using the step function as control effect has been further developed. The paper presents a formalized description of predictive control methods that allow to control temperature of an object with distributed parameters instead of object with lumped parameters temperature control at n points with p heaters. A simulation room model based on measurements of the room and the finite element method in the ANSYS environment was constructed. Using developed predictive controller, experiments of maintaining the assigned daily temperature mode were carried out. The developed method of PWM predictive control with continuous control, two-position, PID-control was compared. Experiments of maintaining the set temperature of the steel hollow rod and the sterilizer chamber using the developed software and hardware complex, based on the microcontroller AtMega 16 and PWM with prediction control method, were carried out.
Велігоцький, Дмитро Олексійович. "Підвищення ефективності хіміко-технологічного процесу комплексної водневої термобарохімічної технології інтенсифікації видобутку вуглеводнів." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/46018.
Full textThe thesis for scientific Degree of the Candidate of Technical Sciences in the specialty 05.17.08 – Processes & Equipment of Chemical Technology (16 – Сhemical and bioengineering). – National Technical University "Kharkiv Polytechnic Institute", Ministry of Education and Science of Ukraine, Kharkiv, 2020. Analysis of modern technologies for increasing the production of hydrocarbons has shown that the most effective and promising techniques are those that have an integral effect on the production horizon by combining effective thermal, chemical and mechanical actions. One of the most promising technologies with an integral effect on the reservoir is that of complex hydrogen thermobaric-chemical effect (CHTBCE). Its chemical-technological process (CTP) is based on the effect of hydrogen activation of the processes of diffusion and fluid filtration in the rock porous medium of the production horizon during the complex exothermal reaction in the well. The objective of the dissertation is to improve the effectiveness of the IHTBCA chemical-technological process, in particular, its hydrogen stages by using physical and mathematical simulation. An experimental complex was developed to study the kinetics of thermobaric processes, and for physical simulation of the integral action, including the hydrogen one, on the alteration of rock porosity-permeability properties. The complex recreates the technological features of the chemical-technological process of the CHTBCE technology. The complex ensures its flow in conditions most closely approximating actual reservoir ones. It helps study not only the kinetics of the complex heterogeneous chemical reaction during CTP flow, but also allows determining the thermobaric and chemical effect of liquid and gaseous products of the reactions of combustible-oxidation compositions and hydroreacting substances (COC-HRS), including hydrogen, on the change of the filtration properties of rock core samples. A technique was developed for experimental research into CTP kinetics. It is based on mixing two process fluids in sequence in a reactor, and measuring and registering the basic parameters of the thermobaric-chemical process to recreate it most closely to the actual one in the well. Analysis of the experimental graphs of the key kinetic parameters of the CTP created by the process fluids with the basic chemical composition demonstrated the ineffectiveness of the CTP’s hydrogen stages and the need to conduct follow-up research to solve this problem. Techniques were suggested for influencing the character of the flow of the multistage CTP thermobaric-chemical action, in particular, its hydrogen stages. The continuance of the low-temperature stage was achieved by using a mixture of up to 50 % of passivated granules of the total amount of ammonium nitrate in the base COC-HRS system. The main types of fast-reacting HRS based on alkali metals, aluminium and sodium were determined. With account of the high chemical activity of these HRS, methods were suggested and developed for their practical application with the use of protective sheaths. Experiments confirmed that adding hydroreacting substances based on aluminium and sodium to basic process fluids produces hydrogen at the low-temperature stage of the process. This hydrogen acts as an activator of diffusion and filtration of the fluid in the rock. Using 0,7-0,95 % of polymer nitrile paracyanogen synthesised by a refined technology as an activator of the combustion process increases the temperature and duration of the flow of the high-temperature CTP stage to a level at which, with the presence of activated hydrogen, partial hydrocracking of heavy hydrocarbons occurs directly in the reservoir. A process line was restored for synthesis of paracyanogen from oxamide. Parameters of its synthesis were found that ensure the improvement of the chemical purity and specific amount of the final product. The synthesis process regulations were refined. A CTP effectiveness assessment method was developed. It is based on determining the impact of CHTBCE technologies with different CTP flow on the recovery of porosity and permeability properties of colmataged natural rock core samples. This method helps determine the most effective chemical-technological process for usage in wells whose productivity has dropped due to different reasons. In conditions close to reservoir ones, the experimental complex developed was used to treat core samples, preliminarily colmataged with a decompositionresistant water-petroleum emulsion, with liquid and gaseous reaction products formed in the reactor with different CTP flow profiles. Experiments established that the CHTBCE CTP, with activation by the polymer nitrile paracyanogen and HRS based on aluminium and sodium, is most effective because the return permeability of the treated core for the specific CTP was 1,05. This is indicative not only of permeability recovery, but also of its increase as compared to the initial one. The developed methods and techniques can be used for improving the controllability of CTP hydrogen stages. They can also be used for determining the effectiveness of introducing the CHTBCE technology at wells with different structural and geological-engineering characteristics, and for identifying the causes of production decrease. To increase technology introduction effectiveness, a method was suggested for refining the quality of computer 3D CHTBCE simulation. The model is based on solving a system of Navier-Stokes equations that describe the laws of conservation of momentum, mass and energy. This helps describe complex filtration problems and enables simulating the CHTBCE process in actual objects. The law of conservation of momentum in filtration problems, depending on the character of filtration, is presented as the Darcy law, the Forchheimer law and the Darcy law with account of diffusion (Fick’s law). All the equations of the system that describe filtration laws include the permeability coefficient. In contrast to the majority of filtration problems, in which permeability coefficients are constants, a technique was developed for refining the 3D computer model of the process of hydrogen thermobaric-chemical action on the well production horizons. The mathematical model accounts for the results of experimental research into the unsteady process of recovery of rock permeability due to the integral hydrogen thermobaric-chemical action. The computational values or the permeability constants in the mathematical model of filtration are replaced with the return permeability change function depending on the relative volume of CTP reaction products. The refined computer model was verified experimentally by comparative analysis of the following: the results of numerical simulation of the reaction products filtration process at the CHTBCE hydrogen stages; and the results of experimental research conducted with actual rock cores. The verification confirmed a significant increase in simulation accuracy. The refined and verified model describes with high accuracy the flow of filtration-diffusion and heat-andmass transfer processes in the actual CTP during the treatment of production formations, and helps estimating treatment results. The refined mathematical model served as the basis of the computer 3D model for stepwise CHTBCE computer simulation with account of CTP kinetics. Such an approach became especially relevant under the condition when, owing to the developed methods, it became possible to control the stages, especially the hydrogen ones, for duration and temperatures. A procedure was developed for preparing to implement the technology with account of physical and mathematical simulation results. The developed procedure enables determining the quantitative and qualitative indicators of the chemical compositions of process fluids that affect the CHTBCE CTP flow, especially those of its hydrogen stages, and the treatment designs required the treatment of each well with account of its individual structural and geological-engineering characteristics and colmatation causes. The developed procedure was applied to creating the treatment design used for pilot industrial implementation of the technology on wells in Ukraine, India, Georgia, and Turkey. The results have confirmed the high effectiveness of the refined and used CTP in both vertical and horizontal wells.
Велігоцький, Дмитро Олексійович. "Підвищення ефективності хіміко-технологічного процесу комплексної водневої термобарохімічної технології інтенсифікації видобутку вуглеводнів." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/45962.
Full textThe thesis for scientific Degree of the Candidate of Technical Sciences in the specialty 05.17.08 – Processes & Equipment of Chemical Technology. – National Technical University "Kharkov Polytechnic Institute", Ministry of Education and Science of Ukraine, Kharkiv, 2020. The dissertation is dedicated to solving a topical scientific-and-practical problem of increasing the effectiveness of the chemical-technological process for intensifying hydrocarbon production, which is based on an integrated usage of anomalous properties of hydrogen as an activator of diffusion and filtration processes. An experimental complex was developed to study the kinetics of thermobaric-chemical processes and for physical modelling of the integral effect, including the hydrogen one, on the change of flow properties and permeability of the rock. The complex recreates the technological features of the chemical-technological process and ensures its flow in conditions utmost close to those in real formation ones. Methods were suggested for affecting the character of flow of the multistage thermobaric-chemical process and increasing its effectiveness, in particular, its hydrogen stages. Experiments have proved that adding hydroreacting substances based on aluminium and sodium to basic process fluids helps produce hydrogen at the low-temperature stage of the process. Hydrogen acts as an activator of diffusion and filtration of the fluid in the rock. Using 0,7-0,95% of a polymer nitrile paracyanogen synthesised to a refined technology as an activator of the combustion process increases the temperature and duration of the high-temperature stage of the chemical-technological process. This is done to a level at which, with the presence of activated hydrogen, processes of partial hydrocracking of heavy hydrocarbons occur directly in the formation. A technique was developed for determining the most effective chemical-technological process for the technology of integrated hydrogen thermobaric-chemical effect. It is based on a comparative analysis of the results of action of chemical-technological processes, differing in nature, on the recovery of the permeability of colmataged rock cores. The computer 3D model of the multistage process of the hydrogen thermobaric-chemical effect on production horizons of wells was refined. Its refinement method accounted for the results of experimental study of the unsteady process of recovery of rock permeability due to the integrated hydrogen thermobaric-chemical action. The refined and verified model describes with high accuracy the flow of filtration-diffusion and heat-and-mass transfer processes in actual chemical-technological processes during the treatment of productive formations, enabling to make prognostic evaluations about treatment results. The algorithm developed for preparing to implement the technology with account of the results of physical and mathematical simulation was used in exploratory-industrial introductions of the technology at wells in Ukraine, India, Georgia, and Turkey. The results have confirmed the high effectiveness of the refined and used chemical-technological processes in both vertical and horizontal wells.
Войтешенко, І. С. "Фізичні чинники спіральності 2" - дезоксирибополінуклеотидів: квантово-механічне моделювання." Diss. of Candidate of Physical and Mathematical Sciences, КНУТШ, 2011.
Find full textОлефір, Л. А., and В. М. Базурін. "Застосування ІКТ для моделювання фізичних явищ." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/22561.
Full textЛобко, Андрій Валерійович. "Енергозберігаючі напівпровідникові перетворювачі для перспективних систем електропостачання." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22721.
Full textDissertation on competition degree of candidate of technical sciences of speсiality 05.09.12 – Semiconductor converters of electric energy. – National Technical University "Kharkov Politechnical Institute", Kharkov, 2016. Dissertation is devoted to development of high-performance and energy-saving semiconductor converters for applications in new and perspective power systems. Developed semiconductor converter with phase control method for forwardlooking FREEDM electrical system is presented. It is shown that that converter performs the same functions available in the converter of this system and allows to obtain the best energy performance by reducing switching loss using soft switching at the fundamental frequency 50 Hz. It is demonstrated that the proposed phase control method is based on the symmetric detuning of the resonance and the introduction of a controlled phase shift between the voltages at the input of the power semiconductor switch and the AC mains. In the dissertation a method of calculating the basic converter settings is proposed. The quality of his work is analyzed. With the help of computer simulations single and three phase converter circuit in different operating modes are studied. The methods of protection from emergency modes are proposed. Experimental studies on the physical model confirmed the accuracy of the theoretical results.
Лобко, Андрій Валерійович. "Енергозберігаючі напівпровідникові перетворювачі для перспективних систем електропостачання." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22720.
Full textDissertation on competition degree of candidate of technical sciences of speсiality 05.09.12 – Semiconductor converters of electric energy. – National Technical University "Kharkov Politechnical Institute", Kharkov, 2016. Dissertation is devoted to development of high-performance and energy-saving semiconductor converters for applications in new and perspective power systems. Developed semiconductor converter with phase control method for forwardlooking FREEDM electrical system is presented. It is shown that that converter performs the same functions available in the converter of this system and allows to obtain the best energy performance by reducing switching loss using soft switching at the fundamental frequency 50 Hz. It is demonstrated that the proposed phase control method is based on the symmetric detuning of the resonance and the introduction of a controlled phase shift between the voltages at the input of the power semiconductor switch and the AC mains. In the dissertation a method of calculating the basic converter settings is proposed. The quality of his work is analyzed. With the help of computer simulations single and three phase converter circuit in different operating modes are studied. The methods of protection from emergency modes are proposed. Experimental studies on the physical model confirmed the accuracy of the theoretical results.
Коробов, Є. А. "Моделювання фізичних процесів в електронних LR-фільтрах." Master's thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/76628.
Full textКругляк, М. В. "Моделювання фізичних процесів в електронних RC-фільтрах." Master's thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/76588.
Full textБезрукова, В. В. "Моделювання фізичних процесів в середовищі MS Excel." Thesis, Сумський державний університет, 2012. http://essuir.sumdu.edu.ua/handle/123456789/29338.
Full textЛитвиненко, Валерія Андріївна, and Valeriia Andriivna Lytvynenko. "Моделювання різних сторін підготовленості кваліфікованих спортсменів з хокею на траві." Master's thesis, СумДПУ імені А. С. Макаренка, 2021. http://repository.sspu.edu.ua/handle/123456789/12209.
Full textToday, sport occupies a central place, as competition in competitions of various levels increases and the significance of victory increases. An athlete or team must represent their country with dignity at competitions of various levels and be worthy competitors to leading teams. Improving the various training of athletes of different qualifications is possible in order to achieve and improve the training process in modern conditions of training for comprehensive development and improvement of results, increase the functional capabilities of the body. Modern requirements for competitive activities, which are put forward by society to the athlete and the team, necessitate the modernization of competitive activities by using the model of competitive activities at the stage of specialized basic training of girls field hockey players and is a relevant research topic. The paper identifies aspects of the training of qualified athletes in field hockey, developed models of versatile training of highly qualified athletes.
Гостєв, Е. С. "Моделювання зв'язаних фізичних полів у складеному середовищі з дефектами." Master's thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/73837.
Full textШевченко, О. В. "Моделювання зв'язаних фізичних полів у скінченій пластині з дефектами." Master's thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/73688.
Full textІгнатенко, Володимир Васильович, Владимир Васильевич Игнатенко, and Volodymyr Vasylovych Ihnatenko. "Математичне моделювання основних фізичних процесів при спрацюванні вибухоподавляючого пристрою." Thesis, Видавництво СумДУ, 2006. http://essuir.sumdu.edu.ua/handle/123456789/18831.
Full textДьоміна, Н. А., and М. В. Морозов. "Математичне комп'ютерне моделювання фізичних процесів при проведенні лабораторних занять." Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/39672.
Full textГришанов, С. В., and В. М. Базурін. "Характеристика Delphi як програмного забезпечення для моделювання фізичних явищ." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/22441.
Full textЦвик, С. О., and М. С. Якименко. "Ігровий рушій Unity як засіб демонстраційного моделювання динамічних фізичних явищ." Thesis, ЦНТУ, 2017. http://dspace.kntu.kr.ua/jspui/handle/123456789/7488.
Full textЄвсєєв, В. В., Н. П. Демська, and Ю. М. Олександров. "Моделювання виробничої лінії SMT-монтажу в кібер-фізичних виробничих системах." Thesis, Кременчуцький національний університет імені Михайла Остроградського, 2022. https://openarchive.nure.ua/handle/document/20422.
Full textСавченко, Лідія Митрофанівна, and Р. О. Тарасенко. "Застосування динамічної симуляції для моделювання роботи вітрогенератора." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/46031.
Full textСинельник, Ірина Василівна. "Комп'ютерне моделювання в курсі загальної фізики технічного университету." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/28182.
Full textФедоренко, Р. С. "Інформаційна система моделювання основного закону динаміки обертального руху." Thesis, Чернігів, 2020. http://ir.stu.cn.ua/123456789/21452.
Full textОб’єкт дослідження: інформаційна система моделювання фізичних законів. Мета роботи: створити інформаційну систему моделювання основного закону динаміки обертального руху у вигляді віртуальної лабораторної роботи. В кваліфікаційній роботі досліджується теоретична основа закону динаміки обертального руху та розглядається установка, яка практично показує роботу даного закону. Проводиться аналіз існуючих інформаційних систем моделювання фізичних процесів. Виконується вибір інструментів та технологій для реалізації системи, а також проектуються клієнтська та серверна частини системи. Розглядається реалізація клієнтської частини інформаційної системи. Наводяться результати тестування комп`ютерній системі.
The qualifying work consists of: 65 pages, 6 tables, 27 figures, 32 formulas, 18 sources used and 3 annexes. Object of research: the computer system for modeling physical laws. The purpose of the work: to create a computer system for modeling the basic law of the dynamics of rotational motion in the form of virtual laboratory work. In the thesis, the theoretical basis of the law of the dynamics of rotational motion is investigated and an equipment that practically shows the work of this law is considered. The analysis of existing computer systems for modeling physical processes is carried out. A selection of tools and technologies for the implementation of the system is carried out, and the client and server parts of the system are designed. The implementation of the client part of the computer system is considered. The results of testing the computer system are given.
Корогод, Г. О. "Комп’ютерне моделювання і дослідження логарифмічної функції перетворення із застосовуванням надлишковості." Thesis, Київський національний університет технологій та дизайну, 2021. https://er.knutd.edu.ua/handle/123456789/19322.
Full textЮрченко, Артем Олександрович, and Artem Oleksandrovych Yurchenko. "Моделювання фізичних основ функціонування інформаційних систем як метод формування ІКТ-компетентності майбутніх вчителів фізики." НПУ імені М. П. Драгоманова, 2014. http://repository.sspu.sumy.ua/handle/123456789/996.
Full textIn the thesis the necessity and the feasibility of modeling physical processes as a modern method of formation of ICT-competence of future teacher of physics.
Шоман, Ольга Вікторівна. "Загальний погляд на проблему геометричного моделювання процесів формоутворення." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/45354.
Full textОлефір, Л. "Завдання з моделювання фізичних явищ як один з шляхів реалізації дослідницького підходу у навчанні фізики." Thesis, Сумський державний університет, 2012. http://essuir.sumdu.edu.ua/handle/123456789/29334.
Full textШпірук, Максим Степанович. "Моделювання процедури пошуку комірки стільникової мережі 5G." Магістерська робота, Хмельницький національний університет, 2021. http://elar.khnu.km.ua/jspui/handle/123456789/11016.
Full textВасиленко, Олег Вадимович. "Удосконалення робочого процесу двотактного двигуна з іскровим запалюванням і безпосереднім вприскуванням палива." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21826.
Full textThesis to obtain scientific degree of Candidate of Engineering sciences on the speciality 05.05.03 – engines and power plants. National Technical University "Kharkiv Polytechnic Institute", Kharkov, 2015. The dissertation is devoted to improving environmental and economic performance two-stroke internal combustion engines with spark ignition by the use of direct fuel injection. Determined that a promising way of internal mixing with direct fuel injection is the organization layered fuel-air charge, providing improved environmental and economic performance. The criterion L, which characterizes the stratification of the fuel-air charge, can qualitatively assess the effect of mixing process on the performance of the engine as a whole. A factor Z, which is deter-mined using indicator efficiency two-stroke engine with external mixture formation, which takes into account only that fuel which is involved in the combustion cylinder engine. The use of direct injection petrol bundle of fuel-air charge modes for loading characteristic at n = 3000 rev/min enabled the reduction in fuel con-sumption of 1.83 times at the effective efficiency rjfmax = 0,31, 7-10 times lower harmful substances (CO, CH) in exhaust gases, the use of gasoline-ethanol blends ensured stable operation of the engine in all load range and a high economic and environmental performance than when using carburetor system power.
Михальчук, Вадим Олегович. "Моделювання фізичного низхідного каналу для мобільного зв'язку п'ятого покоління." Магістерська робота, Хмельницький національний університет, 2021. http://elar.khnu.km.ua/jspui/handle/123456789/11015.
Full textБазурін, В. М. "Завдання на моделювання фізичних явищ як приклад реалізації дослідницького підходу у навчанні інформатики майбутніх учителів математики і фізики." Thesis, Сумський державний університет, 2012. http://essuir.sumdu.edu.ua/handle/123456789/29296.
Full textНіжевський, Ілля Вікторович. "Удосконалення методів модернізації і контролю параметрів заземлювального пристрою міських підстанцій." Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/32565.
Full textDissertation for the degree of Ph.D., specialty 05.14.02 – power stations, networks and systems. – National Technical University "Kharkiv Polytechnic Institute", Kharkov, 2017. The dissertation is devoted to the actual and practical problem of search and development of new methods for measurement of resistance of the grounding devices; developments of new designs of the grounding devices allowing to simplify reconstruction of substations; creation and enhancement of mathematical models and programs for calculation of electric characteristics of the grounding devices of any designs. The analysis of the results of the inspection of existing grounding devices of substations revealed serious violations that lead to deviation of parameters from the norm and to the need for modernization of grounding devices of substations. It is shown that the modernization of grounding devices leads to the restoration of its normalized parameters. Mathematical models of grounding devices of simple two-level structures of horizontal or ring electrodes are developed. As a result of the investigation of the electric field, it is revealed that the potential on the surface of the ground above the center of the square grounding electrode can be higher than above the electrode. The mathematical model of complex two-level grounding devices of substations is enhanced. The method of its electrical characteristics calculating is developed. The influence of the depth of the grid of the upper level of the grounding devices of the substations, the thickness of the humidification layer, the drying or freezing of the soil and the design of the grounding devices on its electrical characteristics was studied. Based on the theoretical substantiation of the method, a technique for measuring the resistance of grounding devices of substations in conditions of dense building of the territory is developed. The method is applicable for any kind of ground heterogeneity, any size and configuration of grounding devices and arbitrary placement of measuring electrodes without finding a zero potential point. Electric characteristics two-level the grounding devices of substations are experimentally researched by method of physical modeling in an electrolytic bathtub. The received results showed good coincidence to results of calculations.
Ніжевський, Ілля Вікторович. "Удосконалення методів модернізації і контролю параметрів заземлювального пристрою міських підстанцій." Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/32563.
Full textDissertation for the degree of Ph.D., specialty 05.14.02 – power stations, networks and systems. – National Technical University "Kharkiv Polytechnic Institute", Kharkov, 2017. The dissertation is devoted to the actual and practical problem of search and development of new methods for measurement of resistance of the grounding devices; developments of new designs of the grounding devices allowing to simplify reconstruction of substations; creation and enhancement of mathematical models and programs for calculation of electric characteristics of the grounding devices of any designs. The analysis of the results of the inspection of existing grounding devices of substations revealed serious violations that lead to deviation of parameters from the norm and to the need for modernization of grounding devices of substations. It is shown that the modernization of grounding devices leads to the restoration of its normalized parameters. Mathematical models of grounding devices of simple two-level structures of horizontal or ring electrodes are developed. As a result of the investigation of the electric field, it is revealed that the potential on the surface of the ground above the center of the square grounding electrode can be higher than above the electrode. The mathematical model of complex two-level grounding devices of substations is enhanced. The method of its electrical characteristics calculating is developed. The influence of the depth of the grid of the upper level of the grounding devices of the substations, the thickness of the humidification layer, the drying or freezing of the soil and the design of the grounding devices on its electrical characteristics was studied. Based on the theoretical substantiation of the method, a technique for measuring the resistance of grounding devices of substations in conditions of dense building of the territory is developed. The method is applicable for any kind of ground heterogeneity, any size and configuration of grounding devices and arbitrary placement of measuring electrodes without finding a zero potential point. Electric characteristics two-level the grounding devices of substations are experimentally researched by method of physical modeling in an electrolytic bathtub. The received results showed good coincidence to results of calculations.
Опанасюк, Анатолій Сергійович, Анатолий Сергеевич Опанасюк, Anatolii Serhiiovych Opanasiuk, Олександр Анатолійович Доброжан, Александр Анатольевич Доброжан, Oleksandr Anatoliiovych Dobrozhan, and П. С. Данильченко. "Моделювання фізичних процесів у напівпровідникових сонячних елементах на основі гетеропереходів n-ITO(ZnO)/n-CdS(n-ZnS, ZnSe)/p-CZTS." Thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67813.
Full textШепотько, Д. Ю. "Удосконалення фізичної підготовленості спортсменів 11-12 років на етапі попередньої базової підготовки у спортивно-бальних танцях." Master's thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/71778.
Full textВ работе рассмотрены вопросы совершенствования физической подготовки спортсменов, специализирующихся в спортивно-бальных танцах на основе рационального построения учебно-тренировочного процесса. Получены новые данные о функциональных показателях, и их влияние на развитие физической подготовки у спортсменов-танцоров 11-12 лет. Представлены модели развития двигательных качеств спортсменов-танцоров, для повышения их физической и технической подготовленности. Материалы исследования могут быть использованы для повышения квалификации тренеров-преподавателей ДЮСШ, преподавателей физического воспитания высших учебных заведений, специалистов отрасли физической культуры и спорта.
The article discusses the issues of improving the physical training of athletes specializing in sports and ballroom dancing, based on the rational construction of the educational process. New data on functional indicators and their impact on the development of physical culture among athletes-dancers 11-12 years old were obtained. Models of the development of motor skills of dancers are presented to increase their physical and technical readiness. Scientific materials can be used to improve the qualifications of coaches and teachers of the Children's and Youth Sports School, teachers of physical education in higher educational institutions and specialists in the field of physical culture and sports.
Молошний, Олександр Миколайович, Александр Николаевич Молошный, and Oleksandr Mykolaiovych Moloshnyi. "Вплив конструкції підвідного пристрою герметичного моноблочного насоса з порожнистим валом на його робочий процес та характеристики." Thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/75137.
Full textThe work is focused on the pump construction, which ensures high performance correlated with the safety aspects. It leads to the application of the pump, where the likelihood of the failure of the unit is minimal. The double entry pumps are commonly used due to the reduction of the hydraulic forces and also hermetic units, with closed, seal-less construction. The thesis presents a new solution to the scientific problem, which focuses on the improvement of the design of a sealless double entry close coupled centrifugal pump with a hollow shaft. In this conception, the inside of the hollow shaft is an axial inlet device, which consists of a straight part and diffuser. The design of a sealless close coupled centrifugal pump has been developed. Conducted analyses are based on the results of the investigation of the influence of axial inlet device geometrical features on pump working process in order to achieve minimal energy losses in the flowing part of the pump. The mutual influence of the construction of plain bearings and forces acting on the motion elements of the pump was elaborated. The rotating parts are loaded with the hydrodynamic, magnetic and gravity forces, which are the preliminary design data of bearing. On the other hand, the construction of bearing is severely acting on the mentioned above forces, which leads to the crucial design problem. Conducted numerical simulations made it possible to estimate the flow structure in the flowing part of the pump. In detail, the influence of the axial inlet device with rotating walls and the diffuser before the impeller inlet on the performance of the pump was recognized. The range of optimum values of axial inlet device diameters is also determined in terms of minimum hydraulic losses in the axial inlet device and electric losses in the rotor magnetic circuits of the motor under the condition of a hollow pump shaft with specific speed (ns) in the range from 60 to 70. Moreover, the flow structure at the impeller inlet, the parameters of the distribution of the absolute velocity components and the cavitation processes in the axial inlet device and the impeller were investigated. It is established that the first appearance of the cavitation was observed in the impeller. The reduction of the axial inlet device diameter leads to the change in the locations of the cavitation zones and the direction of their distribution. The methodical recommendations for the design of sealless close-coupled pump with a hollow shaft and the influence of the geometric parameters of the axial inlet device on the structural features of the leading edge of the blades of the impeller were developed. The results obtained by the numerical simulation were experimentally confirmed.
Білянін, Роман Володимирович. "Тепловий контроль технічного стану індукційних установок для виробництва мідної катанки." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41338.
Full textThe thesis for a Candidate of Engineering Sciences degree by specialty 05.11.13 – devices and methods of control and determination of composition of substances. – National technical university "Kharkov polytechnic institute", Kharkiv, 2019. The thesis solves the important scientific task to improve methods of control of the technical condition of induction installations for the production of high-quality copper rod using the mathematical modeling of electrothermal processes in copper melt and multi-layer thermal insulation, with taking into account its degradation and temperature distribution on the installation surface, which is essential for the development of cable industry. A new method of non-destructive control of the technical condition of induction installations for the production of copper rod for power cables of energy value is developed, in which in addition to measuring the reactive and active resistances of the inductor and the reduction of the water temperature in the cooling system, the degree of degradation of multilayer thermal insulation is additionally determined by comparing the calculated distribution of the current temperature in the volume of melt and insulation on a three-dimensional mathematical model of the installation with practical measurement of temperature in local areas (in the work they were 72) of the surface of the furnace casing. This makes it possible to more accurately predict the furnace's profile and to detect the modes of its operation in a timely manner close to the emergency. A new technical solution for improving the multilayer thermoinsulation of induction installations has been developed in order to reduce their energy consumption and increase the resource. It consists in applying instead of the third thermal insulation layer of light-weight brick of three layers: monolithic refractory concrete, lightweight brick and refractory paper, with the preservation of the overall thickness of the insulation. The implementa-tion of the developed lining structure improvement at PJSC " YUZHCABLE WORKS" in the UPCAST US20X-10 induction installation for copper rod in the cable industry in Ukraine has yielded positive results in a 20°C decrease in the temperature of the furnace casing, a reduction of 5-15% of the specific cost Electricity for 1 ton of production and improvement of quality of copper rod, by reducing the percentage of foreign impurities and ensuring copper content in it 99,99%.
Білянін, Роман Володимирович. "Тепловий контроль технічного стану індукційних установок для виробництва мідної катанки." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41340.
Full textThe thesis for a Candidate of Engineering Sciences degree by specialty 05.11.13 – devices and methods of control and determination of composition of substances. – National technical university "Kharkov polytechnic institute", Kharkiv, 2019. The thesis solves the important scientific task to improve methods of control of the technical condition of induction installations for the production of high-quality copper rod using the mathematical modeling of electrothermal processes in copper melt and multi-layer thermal insulation, with taking into account its degradation and temperature distribution on the installation surface, which is essential for the development of cable industry. A new method of non-destructive control of the technical condition of induction installations for the production of copper rod for power cables of energy value is developed, in which in addition to measuring the reactive and active resistances of the inductor and the reduction of the water temperature in the cooling system, the degree of degradation of multilayer thermal insulation is additionally determined by comparing the calculated distribution of the current temperature in the volume of melt and insulation on a three-dimensional mathematical model of the installation with practical measurement of temperature in local areas (in the work they were 72) of the surface of the furnace casing. This makes it possible to more accurately predict the furnace's profile and to detect the modes of its operation in a timely manner close to the emergency. A new technical solution for improving the multilayer thermoinsulation of induction installations has been developed in order to reduce their energy consumption and increase the resource. It consists in applying instead of the third thermal insulation layer of light-weight brick of three layers: monolithic refractory concrete, lightweight brick and refractory paper, with the preservation of the overall thickness of the insulation. The implementa-tion of the developed lining structure improvement at PJSC " YUZHCABLE WORKS" in the UPCAST US20X-10 induction installation for copper rod in the cable industry in Ukraine has yielded positive results in a 20°C decrease in the temperature of the furnace casing, a reduction of 5-15% of the specific cost Electricity for 1 ton of production and improvement of quality of copper rod, by reducing the percentage of foreign impurities and ensuring copper content in it 99,99%.
В, В. Ковалишин В. М. Ковальчик. "Математичне і фізичне моделювання гасіння пожеж інертними газами в кабельному тунелі." Thesis, 2015. http://hdl.handle.net/123456789/2702.
Full textМатросенков, Олексій Володимирович. "Типи моделей та принципи моделювання фізичних об’єктів у фізиці твердого тіла." Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/3776.
Full textUA : Робота викладена на 77 сторінках друкованого тексту, містить 2 таблиці, 32 рисунки, було використано 25 літературних джерел. Об’єкт дослідження – тверде тіло як об’єкт моделювання. Мета роботи – всебічний аналіз найбільш розповсюджених і вдалих моделей, які використовуються для опису властивостей атомів, молекул твердих тіл. Метод дослідження – емпіричний, теоретичний. Вперше систематизовано і зібрано воєдино широкий клас моделей, необмежених якою-небудь вузькою областю фізики. Робота дає змогу зрозуміти який тип моделювання слід використовувати при спробі змоделювати тверде тіло з бажаними властивостями. Результати роботи рекомендується використовувати для знаходження максимально ефективного способу моделювання об’єктів та процесів у твердих тілах. Також результати можуть бути використані в подальшій науково-дослідній роботі на кафедрі та факультеті. Проведено оригінальну класифікацію моделей за різними ознаками. Розглянуто класичні та квантово-механічні моделі атомів, молекул, кластерів та твердих тіл, зазначені їхні переваги, недоліки й області застосування.
EN : The work is presented on 77 pages of printed text, 2 table, 32 figures, was used 25 literary sources. The object of study is solids as an object of modeling. The aim of the work is a comprehensive analysis of the most common and successful models used to describe the properties of atoms, molecules and solids. Research methods - empirical, theoretical. For the first time, a wide class of models unrestricted by any narrow field of physics was systematized and brought together. The work makes it possible to understand what type of modeling should be used when trying to model solids with the desired properties. It is recommended to use the results to find the most effective way to model objects and processes in solids. Also, the results can be used in further research work at the department and faculty. The original classification of models on various grounds is carried out. Classical and quantum-mechanical models of atoms, molecules, clusters and solids are considered, their advantages, disadvantages and areas of application are indicated.
Чебан, І. С. "Розвиток споживчого кредитування в умовах економічної циклічності." Thesis, 2018. http://dspace.oneu.edu.ua/jspui/handle/123456789/8094.
Full textThe purpose of the thesis is to substantiate theoretical and methodological, methodical and applied principles of consumer lending and develop practical recommendations for its improvement.