Вісник НТУУ «КПІ». Радіотехніка, радіоапаратобудування: збірник наукових праць
Постійне посилання на фонд
ISSN 2310-0389 (Online), ISSN 2310-0397 (Print)
Періодичність: 4 рази на рік
Рік заснування: 1956
Тематика: теоретична радіотехніка; електродинаміка; теорія та засоби телекомунікацій; антени та пристрої НВЧ діапазону; теорія та практика радіовимірювань; конструювання радіоапаратури; мікроелектронна та наноелектронна техніка; технологія радіоапаратобудування; засоби та методи мультимедіа; засоби захисту інформації; електронна побутова апаратура; цифрова та обчислювальна техніка; радіоелектроніка біомедичних технологій.
Офіційний сайт: http://radap.kpi.ua/radiotechnique
Рік заснування: 1956
Тематика: теоретична радіотехніка; електродинаміка; теорія та засоби телекомунікацій; антени та пристрої НВЧ діапазону; теорія та практика радіовимірювань; конструювання радіоапаратури; мікроелектронна та наноелектронна техніка; технологія радіоапаратобудування; засоби та методи мультимедіа; засоби захисту інформації; електронна побутова апаратура; цифрова та обчислювальна техніка; радіоелектроніка біомедичних технологій.
Офіційний сайт: http://radap.kpi.ua/radiotechnique
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Документ Відкритий доступ 77 ГГц радар для автомобіля(НТУУ «КПІ», 2012) Ляшук, О. М.; Lyashuk, O. M.; Ляшук, А. Н.Документ Відкритий доступ A Computational Model of Electrophysiological Properties of Cardiomyocytes(КПІ ім. Ігоря Сікорського, 2018) Ivanushkina, N. G.; Ivan’ko, E. O.; Prokopenko, Yu. V.; Redaelli, A.; Tymofieiev, V. I.; Visone, R.; Іванушкіна, Н. Г.; Іванько, К. О.; Прокопенко, Ю. В.; Редаеллі, А.; Тимофєєв, В. І.; Вісоне, Р.; Иванушкина, Н. Г.; Иванько, Е. О.; Прокопенко, Ю. В.; Редаэлли, А.; Тимофеев, В. И.; Висонэ, Р.Документ Відкритий доступ Advanced Edge Detection Techniques for Enhanced Diabetic Retinopathy Diagnosis Using Machine Learning(КПІ ім. Ігоря Сікорського, 2024) Basarab, M. R.; Ivanko, K. O.Diabetic retinopathy (DR) represents one of the most serious complications associated with diabetes mellitus, posing a significant threat to vision and leading to severe impairment and potential blindness if not diagnosed and treated promptly. The study investigates the integration of advanced edge detection techniques with machine learning algorithms to enhance the precision and effectiveness of DR diagnosis. By leveraging the APTOS 2019 Blindness Detection dataset, the research employs a combination of edge detection methods such as the Sobel operator and the Canny edge detector, alongside advanced preprocessing techniques and sophisticated feature extraction methods. The study reveals that the synergy between these edge detection techniques and machine learning significantly boosts the diagnostic accuracy of neural networks. Specifically, the accuracy for multiclass classification (spanning five categories: No diabetic retinopathy, Mild, Moderate, Severe, and Proliferative diabetic retinopathy) improved from 78.5% to an impressive 88.2%. This marked enhancement underscores the potential of these techniques in refining the diagnostic processes for early DR detection. By improving the accuracy of classification, this approach not only facilitates early intervention but also plays a crucial role in reducing the risk of severe vision loss among patients with diabetes. The findings of this study emphasize the importance of integrating advanced image processing techniques with machine learning frameworks in medical diagnostics. The improved outcomes demonstrated in this research highlight the potential for such technological advancements to contribute meaningfully to the field of ophthalmology, leading to better patient care and potentially transforming the standard of practice in DR diagnosis.Документ Відкритий доступ Analysis of Chi-Squared Divergence Changes by Filtering of Stego Images Formed According to UNIWARD Embedding Methods(КПІ ім. Ігоря Сікорського, 2019) Progonov, D. O.Документ Відкритий доступ Analysis of the Efficiency of the Kalman-Type Correlation Algorithm for Tracking of a Small UAV in the Presence of Uncorrelated(КПІ ім. Ігоря Сікорського, 2021) Herasymenko, A. O.; Zhuk, S. Ya.The article shows the relevance of the problem of development and analysis of algorithms for tracking small-sized UAVs according to video surveillance. A Kalman-type correlation algorithm for tracking of a small-sized UAV in the presence of spatially uncorrelated interference, which is the most common in practice, is synthesized. In the obtained algorithm, the UAV motion parameters are estimated independently along the axes of a rectangular coordinate system. Positioning accuracy analysis using the correlation algorithm, as well as the correlation algorithm for tracking UAVs based on the Kalman filter, was carried out by statistical modeling in the Matlab programming environment.Документ Відкритий доступ Application of the «Endless Train» Method for the SDN Controller OpenDayLight(КПІ ім. Ігоря Сікорського, 2017) Скулиш, М. А.; Skulysh, M. A.; Скулыш, М. А.Документ Відкритий доступ Automated Precision Amplitudes and Phases Measurement of Polyharmonic Eddy Current Signals of Non-destructive Testing(КПІ ім. Ігоря Сікорського, 2023) Bazhenov, V. G.; Kalenychenko, Yu. O.; Ratsebarskiy, S. S.; Gloinik, K. A.The development of electronic systems like Field-Programmable Gate Array (FPGA) made them available for mass commercial use. This created conditions for the development and application of software and technical tools implemented on FPGA algorithms for fast processing of digital signals. Such solutions, in turn, opened up new opportunities for the spread of multi-frequency eddy current systems (МFЕС) for non-destructive testing (NDT) in the form of systems for simultaneous processing of digital signals of different frequencies, which allows MFEC to effectively compete with pulsed eddy current systems (PEC). This work presents a new algorithm for accurate digital measurement of the MFEC amplitude and phase of harmonic components of polyharmonic signals, which is implemented in hardware and software on FPGA. The measurement of the amplitude and phase of harmonic components is based on the method of orthogonal processing of digital signals, to increase the accuracy of which the necessity of fulfilling the condition of multiplicity of the sampling sequence to the size of the digital signal period has been proved. Compliance with this condition is achieved by adjusting the length of the sampling sequence, which in the proposed algorithm is performed before orthogonal processing. The influence of inaccuracy in setting the length of the sampling sequence on the size of measurement errors when determining the amplitude and phase of the harmonic components of the signal is simulated. As a result of the simulation, it was established that when the multiplicity condition is met, the measurement error significantly decreases, which indicates the high efficiency of our algorithm. The achieved accuracy of measuring the amplitude of harmonic components and the phase of polyharmonic signals due to the given hardware and software implementation of the algorithm makes it possible to create inexpensive, compact, scalable automated digital systems, the measurement data of which can be used both to determine the individual characteristics of the object and to reconstruct three-dimensional images, i.e. in tomographic systems.Документ Відкритий доступ Calculation Model for Optoelectronic Remote Sensing System’s Radiometric Resolution at Arbitrary Viewing Angles(КПІ ім. Ігоря Сікорського, 2017) Kolobrodov, V. H.; Lykholit, M. I.; Mykytenko, V. I.; Tiagur, V. M.; Dobrovolska, K. V.; Колобродов, В. Г.; Лихоліт, М. І.; Микитенко, В. І.; Тягур, В. М.; Добровольська, К. В.; Колобродов, В. Г.; Лихолит, Н. И.; Микитенко, В. И.; Тягур, В. Н.; Добровольская, Е. В.Документ Відкритий доступ CJFET Differential Pairs Constructions and Characteristics for Design of CBiCJFet Differential Amplifiers and Differential Difference Amplifiers(КПІ ім. Ігоря Сікорського, 2019) Savchenko, E. M.; Drozdov, D. G.; Rodin, V. G.; Grushin, А. I.; Dukanov, P. А.; Prokopenko, N. N.Документ Відкритий доступ Comparison of Monopolar and Bipolar Cox-Maze Ablation Based on Clinical Data and Mathematical Modeling(КПІ ім. Ігоря Сікорського, 2020) Stasiuk, Y. P.; Sychyk, M. M.; Maksymenko, V. B.; Kravchuk, B. B.Документ Відкритий доступ Comprehensive Reliability Assessment Technique of Telecommunication Networks Equipment with Reducible Structure(КПІ ім. Ігоря Сікорського, 2020) Mogylevych, D. I.; Kononova, I. V.; Kredentser, B. P.; Karadschow, I.Документ Відкритий доступ Computer Modelling Technologies of Optical System of Polarizing Thermal Imager(КПІ ім. Ігоря Сікорського, 2020) Kolobrodov, V. H.Документ Відкритий доступ Control of the Modified Chaotic Chua’s Circuit Using Threshold Method(КПІ ім. Ігоря Сікорського, 2018) Rusyn, V. B.; Pribylova, L.; Dimitriu, D.-G.Документ Відкритий доступ Controlled Brewster effect in the scattering of electromagnetic waves on pseudo-rotating lattices of dielectric resonators(КПІ ім. Ігоря Сікорського, 2023) Trubin, O. O.Various conditions for the occurrence of anomalous scattering, in which most of the power is emitted by the lattice only in the direction of propagation of the incident wave, are analyzed. An analytical model for the scattering of plane electromagnetic waves on arrays of pseudo-rotating dielectric resonators (DRs) of cylindrical and rectangular shape is developed. New analytical relations are derived for the functions that determine the coupling between the field of a plane wave and the main types of magnetic oscillations of the rotated DR. The angles between the axis of the DR and the directions of propagation of plane waves, at which the coupling between the DR and the incident wave reaches extreme values, are studied. The conditions of non-resonant scattering and scattering with the absence of a reflected petal, known as the Brewster effect, were established. The general relations between the angles of inclination of DRs, polarization and the angles of incidence of waves on lattices, which lead to special cases of scattering, were found. There is a similarity between non-resonant scattering and the known Malyuzhynets effect, which describes the passage of waves through lattices of other types. Scattering models for lattices of rotated cylindrical and rectangular DRs were built. The difference between the classical Brewster effect and the petal-free cases of scattering on lattices built on the basis of the use of pseudo-rotating DRs was noted. In particular, it’s shown that, unlike other methods of realizing metasurfaces of this class, cases of scattering without petals on lattices of pseudorotating resonators are possible when the angles of incidence are changed in a wider band. The obtained theoretical results allow us to propose a new class of devices built on the basis of the use of pseudo-rotating DRs, to significantly reduce the calculation time and to optimize complex multi-resonator structures. New types of lattices built on pseudo-rotating DRs can be used to design a wide class of antennas, as well as multiplexing devices in terahertz, infrared, and optical wavelength range communication systems.Документ Відкритий доступ Coupling coefficients of different cylindrical dielectric resonators in the open space(КПІ ім. Ігоря Сікорського, 2016) Trubin, A. A.Документ Відкритий доступ Coupling Coefficients of Different Disk Microresonators with Whispering Gallery Modes(КПІ ім. Ігоря Сікорського, 2017) Trubin, A. A.Документ Відкритий доступ Coupling coefficients of the disk dielectric microresonators with whispering gallery modes(НТУУ «КПІ», 2015) Trubin, A. A.Документ Відкритий доступ Coupling coefficients of the Spherical dielectric microresonators with whispering gallery modes(НТУУ «КПІ», 2015) Trubin, A. A.Документ Відкритий доступ Criteria and Procedures for Estimating the Informativity and Feature Selection in Biomedical Signals for their Recognition(КПІ ім. Ігоря Сікорського, 2016) Shulyak, A. P.; Shachykov, A. D.; Шуляк, О. П.; Шачиков, А. Д.; Шуляк, А. П.; Шачиков, А. Д.Документ Відкритий доступ Design, modeling and research of the new non-autonomous chaotic generator(КПІ ім. Ігоря Сікорського, 2019) Rusyn, V. B.; Pavlyukevich, I.; Pribylova, L.; Skiadas, H. Ch.