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Academic literature on the topic 'Просторові гармоніки'
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Journal articles on the topic "Просторові гармоніки"
Плахтій, Олександр Андрійович, Володимир Павлович Нерубацький, Дмитро Андрійович Шелест, and Владислав Романович Цибульник. "Дослідження впливу скін-ефекту на втрати потужності в системах тягового електропостачання постійного струму." Інформаційно-керуючі системи на залізничному транспорті 26, no. 4 (December 14, 2021): 3–14. http://dx.doi.org/10.18664/ikszt.v26i4.247224.
Full textRomanyuk, A. S., and S. Ya Yanchenko. "Оцiнки апроксимацiйних характеристик i властивостi операторiв найкращого наближення класiв перiодичних функцiй у просторi." Ukrains’kyi Matematychnyi Zhurnal 73, no. 8 (August 18, 2021): 1102–19. http://dx.doi.org/10.37863/umzh.v73i8.6755.
Full textМішеніна, Тетяна Михайлівна. "Лінгвістична інтерпретація темпоральних металогічних образів в українському ідіописьмі (на прикладі творчості Ірини Жиленко)." Філологічні студії: Науковий вісник Криворізького державного педагогічного університету 15 (December 20, 2016): 222–36. http://dx.doi.org/10.31812/filstd.v15i0.179.
Full textTimenyk, Z. I. "Українські мислителі про філософсько-релігійні ідеї одкровення, преображення: методологічні засади." Науково-теоретичний альманах "Грані" 19, no. 11(139) (October 12, 2016): 93. http://dx.doi.org/10.15421/1716127.
Full textKovalevskii, S. B., and R. Ya Tatarchuk. "Колорит кам'янистих садів." Scientific Bulletin of UNFU 28, no. 11 (December 27, 2018): 14–17. http://dx.doi.org/10.15421/40281102.
Full textКучерук, О. "ТЕОРЕТИЧНИЙ ДОСВІД ОСМИСЛЕННЯ ЦІННОСТЕЙ У СОЦІАЛЬНО-ФІЛОСОФСЬКОМУ ВИМІРІ." Вісник Житомирського державного університету імені Івана Франка. Філософські науки, no. 1(89) (September 3, 2021): 128–37. http://dx.doi.org/10.35433/philosophicalsciences.1(89).2021.128-137.
Full textАндрієвська, Вікторія. "КОНЦЕПТУАЛЬНИЙ АНАЛІЗ ІНДИВІДУАЛЬНО-АВТОРСЬКОЇ КАРТИНИ СВІТУ У ФРАНКОМОВНОМУ ПІСЕННОМУ ДИСКУРСІ." Актуальні питання іноземної філології, no. 13 (June 22, 2021): 5–10. http://dx.doi.org/10.32782/2410-0927-2020-13-1.
Full textDuda, N. М., and O. М. Lobodynska. "Дослідження традицій у сучасній побутовій культурі українців: міждисциплінарний аспект." Scientific Bulletin of UNFU 29, no. 3 (April 25, 2019): 129–32. http://dx.doi.org/10.15421/40290327.
Full textFedorova, Alexandra. "Категорія «класичне» в масовому суспільному сприйнятті: історичний і сучасний погляд." Музичне мистецтво і культура, no. 26 (April 25, 2018): 52–62. http://dx.doi.org/10.31723/2524-0447-2018-26-52-62.
Full textКОЗЕЛЕЦЬ, Тетяна. "РОЛЬ ПАПЕРОВОЇ ПЛАСТИКИ В СУЧАСНОМУ ДИЗАЙНІ." Scientific papers of Berdiansk State Pedagogical University Series Pedagogical sciences 2, no. 2 (2020): 70–77. http://dx.doi.org/10.31494/2412-9208-2020-1-2-70-77.
Full textDissertations / Theses on the topic "Просторові гармоніки"
Шібан, Тамер. "Електромагнітний багатопараметровий перетворювач з просторово-періодичним полем для контролю циліндричних виробів." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41998.
Full textThe dissertation presents the scientific and technical results of the study of the electromagnetic multi-parameter transducer for the cylindrical metal products parameters determining, which principle is based on the allocation of the amplitude and phase of the spatial harmonics of a nonuniform magnetic field presented in the form of a Fourier series. The object of the study is in the full extent described in the scientific literature. It is shown that further increase of information parameters controlled by one transducer can be carried out in several ways. For example, the use of different frequency to power the transducers, signal filtering and separation of amplitude and phase at each frequency. Such implementation of multiparameter sensors is quite complicated and does not always give the true picture of the processes taking place in the controlled object due to the different depth of field penetration (skin effect). It has been shown that the application of the study results provides an opportunity to obtain more information about the studied object that could not be obtained by using traditional methods. Therefore, the application of the developed method is promising. The physic-mathematical model of an electromagnetic transducer with non-uniform distribution of an electromagnetic field for a conductor with a current located along the lateral surface of a cylindrical product at a distance d from the center of a metallic cylinder of radius a. The spatial problem of the distribution of a magnetic field variable in time is solved and expressions allowing calculating the functions for any spatial harmonic are obtained and it is possible to make a picture of the distribution of the field in any area (inside the product, between the product and conductor with current, as well as beyond this conductor). Mathematical expressions are obtained to determine the intensity of the magnetic field for r-th and φ-th components, generated by the current of one conductor (or pole with finite angular dimensions). The thickness of the pole with a total current is taken into account, which leads to the replacement of r quantity in the formulas for field strength by effective radius. Mathematical expressions are obtained to determine amplitude and phase of transducer’s signal n-th spatial harmonics, which are generated in the measuring windings located along the surface of the cylindrical object with the angular coordinate φ on a circle of radius d. Experiments have been carried out to confirm the adequacy of the transducer’ proposed model, which showed the difference between the calculated and experimentally obtained values of the EMF of the transducer’ output signal. For instance, for measuring windings with angular coordinates φ = 0° і φ = 180° difference of voltage values is less than 5% and for measuring windings with angular coordinates φ = 30°, 60°, 300° і 330° difference is less than 10%. Methods and algorithms of allocating the necessary spatial harmonics and eliminating harmonics with high numbers are offered also. The latter allows us to reduce the influence of the higher spatial harmonics down to 1%. To exclude from the spatial distribution of the field odd or even harmonics it is suggested to use a system of conductors with the same and opposite directions of currents in them. The universal transformation functions for the amplitude and phase of the n-th harmonic component for the transducer are obtained. Method is developed for simultaneous testing electrical (σ), magnet (μr) and geometrical (а) parameters of cylindrical objects, by the use of transducer with on magnetizing pole considering 1-st and 2-nd spatial harmonics, which allows unambiguously solve the task of multi-parameter testing for a wide variety of products, various designs and modes of operation of transducers. The method based on the electromagnetic transducer with two magnetized poles and a different direction of current is developed. The universal functions of conversion with use of 1-st and 3-rd spatial harmonics are obtained, also the algorithm of realization of cylindrical wares’ parameters multi-parameter control is offered. The sensitivity of the method is determined and rational modes of transducer operation are found. The calculation is performed and the effect of the higher harmonics of the field on the output signals of the transducer is shown. For example, for a transducer with one excitation wire, the rejection of the 3-rd harmonic will result in an error of the resulting EMF calculation equal to 5%, and for a transducer with two excitatory wires, when the 5-th harmonic is rejected, it is 1.5%. A layout of a laboratory unit with an electromagnetic transducer with a spatial-periodic field structure was developed and experimental studies were carried out to determine μr σ, and а with simulation samples of different sorts to confirm the adequacy of the developed method. The construction of an electromagnetic transducer with two excitation poles and a different direction of the magnetizing current with the use of the amplitude of the 1-st and 3-rd spatial harmonics and the 1-st harmonic phase is presented. As soon as direct estimation of error of testing μr, σ and а for the developed multi-parameter transducer is quite complicated, in the work the measurements of these parameters were carried out by control methods. So, to estimate а of the studied sample micrometer with a diameter measuring range (50 ± 0,01) mm was used, to estimate σ of a cylindrical sample, a contact electric method was used based on the potentiometer of direct current Р363-3 (R363-3), having accuracy class of 0,005, to estimate μr the method of an ammeter – voltmeter for a ring sample was used. It is shown that implementation of the developed transducer allows to receive the most complete information about the condition of electric power lines, that is to define μr, σ, and a of cylindrical wires, as well as the mechanical load, temperature, magnitude of the current flowing in the line correlated with them and the determination of specific electrical losses during the diagnosis of the state of electric power lines, as evidenced by the implementation act dated 18.12.2015 (agreement № 377551 dated 27.07.2015 between NTU “KhPI” and PJSC “Ukrhydroproekt” city of Kharkiv).
Шібан, Тамер. "Електромагнітний багатопараметровий перетворювач з просторово-періодичним полем для контролю циліндричних виробів." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41997.
Full textDissertation for the degree of candidate of technical sciences (doctor of philosophy) in specialty 05.11.13 – instruments and methods of substance composition control and determination. National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2019. The physic-mathematical model of an electromagnetic transducer with non-uniform distribution of an electromagnetic field for a conductor with a current located along the lateral surface of a cylindrical product at a distance d from the center of a metallic cylinder of radius a. Mathematical expressions are obtained to determine the intensity of the magnetic field for r-th and φ-th components, generated by the current of one conductor (or pole with finite angular dimensions). The thickness of the pole with a total current is taken into account, which leads to the replacement of r quantity in the formulas for field strength by effective radius. Mathematical expressions are obtained to determine amplitude and phase of transducer’s signal n-th spatial harmonics, which are generated in the measuring windings located along the surface of the cylindrical object with the angular coordinate φ on a circle of radius d. Experiments have been carried out to confirm the adequacy of the transducer’ proposed model, which showed the difference between the calculated and experimentally obtained values of the EMF of the transducer’ output signal. For instance, for measuring windings with angular coordinates φ = 0° і φ = 180° difference of voltage values is less than 5% and for measuring windings with angular coordinates φ = 30°, 60°, 300° і 330° difference is less than 10%. The method based on the electromagnetic transducer with two magnetized poles and a different direction of current is developed. The universal functions of conversion with use of 1-st and 3-rd spatial harmonics are obtained, also the algorithm of realization of cylindrical wares’ parameters multi-parameter control is offered.
Гетьман, Андрій Володимирович. "Аналіз та синтез структури магнітного поля технічних об'єктів на основі просторових гармонік." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/39623.
Full textDissertation for the degree of Doctor of Technical Sciences in the specialty 05.09.05 – theoretical electrical engineering (141 – electric power engineering, electrotechnics and electromechanics). – National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2019. The dissertation is devoted to solve the actual scientific problem of the development of theoretical bases, analysis and synthesis methods and means of the spatial structure of the stationary magnetic field of technical objects on the basis scalar potential’s of elongated spheroidal, spherical, flattened-spheroidal, and cylindrical harmonics. In the thesis substantiated practical application principles of spatial harmonic analysis of the magnetic field near the technical objects (TO) surface, taking into account their forms peculiarities. To use as a theoretical basis for the synthesis of magnetic fields current sources, the generalized vector’s potential representation is obtained in the form of its interrelation with elongated-spheroidal, spherical and oblate-spheroidal harmonics of the scalar potential of the magnetic field. The experimental determination method of amplitude coefficients of spatial harmonics, based on the generalized representation of spherical and spheroidal harmonics of the magnetic field, is developed for practical determination of the spatial structure of the magnetic field near the surface of technical objects, using a single experimental-methodical basis. The method for practical determination of the values of the 24 amplitude coefficients of spherical harmonics of a magnetic field by means of a system of circular contour windings using, in the mathematical processing of rotational signatures, the property of reducing the relative contribution to the measured magnetic flux from the harmonics of the higher power magnetic field when moving away from the surface of TO is developed. The method of experimental determination of multipole magnetic moments, based on integral processing of pass-through characteristics of three magnetics induction projections, fixed near the technical object, with its linear displacement, is developed. The classification of methods and means of experimental spherical harmonic’s determination of technical object’s magnetic field is fulfilled. The principles of system’s construction for experimental determination of spatial harmonics of magnetic field TO are substantiated. An analytical electromagnet’s model of the magnetic field, based on a cylindrical harmonic analysis of the inductive magnetization of its ferromagnetic core, was developed to find cylindrical electromagnet’s parameters with a maximum-created magnetic moment. To create a quadrupole electromagnet with the given quality of the magnetics field spatial structure, a method for minimizing the contributions of nonquadrupture intermediate-integral lengths of the magnetic induction coefficients in the aperture, based on their found relationship with the parameters of the floors yarn construction and the superconducting current winding, was developed.
Гетьман, Андрій Володимирович. "Аналіз та синтез структури магнітного поля технічних об'єктів на основі просторових гармонік." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/39626.
Full textDissertation for the degree of Doctor of Technical Sciences in the specialty 05.09.05 – theoretical electrical engineering (141 – electric power engineering, electrotechnics and electromechanics). – National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2019. The dissertation is devoted to solve the actual scientific problem of the development of theoretical bases, analysis and synthesis methods and means of the spatial structure of the stationary magnetic field of technical objects on the basis scalar potential’s of elongated spheroidal, spherical, flattened-spheroidal, and cylindrical harmonics. In the thesis substantiated practical application principles of spatial harmonic analysis of the magnetic field near the technical objects (TO) surface, taking into account their forms peculiarities. To use as a theoretical basis for the synthesis of magnetic fields current sources, the generalized vector’s potential representation is obtained in the form of its interrelation with elongated-spheroidal, spherical and oblate-spheroidal harmonics of the scalar potential of the magnetic field. The experimental determination method of amplitude coefficients of spatial harmonics, based on the generalized representation of spherical and spheroidal harmonics of the magnetic field, is developed for practical determination of the spatial structure of the magnetic field near the surface of technical objects, using a single experimental-methodical basis. The method for practical determination of the values of the 24 amplitude coefficients of spherical harmonics of a magnetic field by means of a system of circular contour windings using, in the mathematical processing of rotational signatures, the property of reducing the relative contribution to the measured magnetic flux from the harmonics of the higher power magnetic field when moving away from the surface of TO is developed. The method of experimental determination of multipole magnetic moments, based on integral processing of pass-through characteristics of three magnetics induction projections, fixed near the technical object, with its linear displacement, is developed. The classification of methods and means of experimental spherical harmonic’s determination of technical object’s magnetic field is fulfilled. The principles of system’s construction for experimental determination of spatial harmonics of magnetic field TO are substantiated. An analytical electromagnet’s model of the magnetic field, based on a cylindrical harmonic analysis of the inductive magnetization of its ferromagnetic core, was developed to find cylindrical electromagnet’s parameters with a maximum-created magnetic moment. To create a quadrupole electromagnet with the given quality of the magnetics field spatial structure, a method for minimizing the contributions of nonquadrupture intermediate-integral lengths of the magnetic induction coefficients in the aperture, based on their found relationship with the parameters of the floors yarn construction and the superconducting current winding, was developed.
Рябчиков, Микола, and Анастасія Нікуліна. "Об'ємно-просторові засоби дизайн-діяльності." Thesis, Київський національний університет технологій та дизайну, 2018. https://er.knutd.edu.ua/handle/123456789/10019.
Full textThe essence of the volumetric and spatial structure of the composition that provides spatial conditions for the realization of the design process is characterized. In the course of the study, volumetric and spatial means of design activity are determined, which allow harmonious shaping of design objects. The basic processes of organization of the external and internal form of the costume are revealed.
Гетьман, Андрій Володимирович. "Досвід забезпечення магнітної сумісності вітчизняних космічних апаратів за допомогою просторових гармонік магнітного поля." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/26071.
Full textРубан, Анатолій Іванович, Анатолий Иванович Рубан, Anatolii Ivanovych Ruban, Ольга Володимирівна Прокопчук, Ольга Владимировна Прокопчук, and Olha Volodymyrivna Prokopchuk. "Аналіз режимів збудження просторових гармонік дифракційно-черенковського випромінювання в середовищі з різною діелектричною проникністю." Thesis, Сумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/45824.
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