Browsing Сериальные издания by Title

Now showing items 234-253 of 7869

    • Mathematical modelling of the unmanned aerial vehicle dynamics 

      Stepanov, V. Y. (БНТУ, 2018)
      The article gives a classification of the main components of unmanned aerial vehicle (UAV) systems, gives the areas in which the application of UAVs is actual in practice today. Further, the UAV is considered in more detail from the point of view of its flight dynamics analysis, the equation necessary for creating a mathematical model, as well as the model of an ordinary dynamic ...
      2018-06-12

    • Maximum power point tracking system for photovoltaic station : a review 

      Elzein, Imad A. (БНТУ, 2015)
      В последние годы проявляется растущий интерес к использованию возобновляемых источников энергии, среди которых особое положение занимает солнечная энергия благодаря неисчерпаемости своих запасов. Тем не менее фотоэлектрические станции характеризуются большими капитальными затратами и низкой эффективностью преобразования. Кроме того, вольтамперные характеристики солнечных элементов ...
      2015-12-01

    • Measurement of Steel Structure Elements in the Specialized Module of the IMAGE-SP Image Processing Software 

      Anisovich, A. G. (БНТУ, 2020)
      Grain size is one of the most important characteristics of the microstructure of metals and alloys. Determination of the grain size of steel is regulated by Standart 5639-82 "Steels and alloys. Methods for detection and determination of the grain size". Standart includes determining the grain score by comparison with reference scales, as well as manual measurement methods. The ...
      2020-12-18

    • Measurement of the amplitude of periodic signals using the Fibonacci method 

      Petrushak, V. S. (БНТУ, 2018)
      Development of new methods and high-rate means for converting the amplitude of high-frequency periodic signals into a binary code with high speed for solving problems of industrial tomography, radar, radio navigation, during measurements of amplitude-frequency characteristics, measurement of the amplitude of signal generators is relevant in scientific terms and useful in practical ...
      2018-06-18

    • Measurement of vibration parameters of the waveguide for medical treatment 

      Palevicius, A.; Bubulis, A.; Minchenya, V. (БНТУ, 2011)
      Methods allowing investigation of vibrations of the stainless steel waveguide by combining noncontact techniques with the state-of-the-art multiphysics software are developed. The vibrations of the waveguide, used in nowadays surgery are examined by the aids of the holographic interferometry technique, vibrometer based on Doppler shift of backscattered laser light and the ...
      2012-03-28

    • Measurement stand for study properties of isolation materials using polarization method 

      Zukowski, P.; Koltunowicz, T.; Kozak, Cz.; Kierczynski, K.; Rogalski, P. (БНТУ, 2014)
      The article presents measurement stand, which is used to measure polarization and depolarization currents, using PDC method, in wet transformer oil-impregnated cellulose isolation. Maximum resolution of measured currents reaches 10-15 A. The accuracy of thermal stabilization, in three-electrode capacitor system, comes to 0,001 °C.
      2014-08-25

    • Measurement Stand, Method and Results of Composite Electrotechnical Pressboard-Mineral Oil Electrical Measurements 

      Rogalski, P. (БНТУ, 2020)
      The paper presents a measuring stand designed and built for testing direct and alternating current properties of power transformers basic insulation component i.e. electrotechnical pressboard impregnated with transformer oil. Measurements of direct and alternating current parameters are performed using the frequency domain spectroscopy and polarization depolarization current ...
      2020-09-18

    • Measurements of Periodic Signals Phase Shifts with Application of Direct Digital Synthesis 

      Gula, I. V.; Polikarovskykh, O. I.; Horiashchenko, K. L.; Karpova, L. V.; Melnychuk, V. M. (БНТУ, 2019)
      The development of new methods and high-bit instruments for measuring phase shifts of high-frequency periodic signals with high speed for radar and radionavigation tasks is an actual task. The purpose of this work is to create a new phase shift meter for high-frequency periodic signals based on the double-matching method using direct digital frequency synthesis. On the basis of ...
      2019-06-27

    • Measuring of depth profile of defects of hot rolled steel sheet by imaging the grating on sheet surface 

      Marukovich, E. I.; Branovitsky, A. M.; Dementjev, V. A.; Maksimovich, Yu. V.; Lebedinsky, Yu. A. (БНТУ, 2011)
      The approach to measure defect of mill products during their rolling is considered. The performance of supposed scheme is analyzed for real time conditions.
      2014-07-02

    • Measuring Setup for Investigation and Visualization of the Percolation Phenomenon in Non-Оrdered Models of Metal-Dielectric Nanocomposites 

      Okal, P. (БНТУ, 2020)
      The study uses the phenomenon of high voltage partial discharge to investigate the phenomenon of percolation and visualisation of the percolation channel. The phenomenon of partial discharges is very similar to the quantum tunneling phenomenon observed in metal-dielectric nanocomposites. In both cases the flow of alternating current occurs in the absence of direct contact between ...
      2020-09-18

    • Mesh network development project in Great Stone industry park 

      Пинг, Пей; Петренко, Ю. Н. (БНТУ, 2016)
      Беспроводная ячеистая сеть (WMN) все чаще становится популярным решением из-за низкой стоимости как альтернатива проводной сети для предоставления широкополосного доступа для пользователей. Беспроводная ячеистая сеть (WMN) представляет собой коммуникационные сети, состоящие из радио узлов, организованных в топологии сети. Беспроводные сети состоят из сети клиентов, сетевых ...
      2016-03-27

    • Mesh network simulation 

      Pei, Ping; Petrenko, Y. N. (БНТУ, 2015)
      A Mesh network simulation framework which provides a powerful and concise modeling chain for a network structure will be introduce in this report. Mesh networks has a special topologic structure. The paper investigates a message transfer in wireless mesh network simulation and how does it works in cellular network simulation. Finally the experimental result gave us the information ...
      2015-10-30

    • Method for Increasing of Lens Gluing Technological Process Efficiency and a Reliable Evaluation of Output Controlled Parameters 

      Fiodоrtsev, R. V.; Metelskaya, E. A.; Marchik, V. A.; Kuznetsov, A. V.; Makarevich., A. E. (БНТУ, 2022)
      The use of glued lens components in optical devices improves the image quality of telescopic and photographic lenses or inverting systems by eliminating a number of aberrations, and also reduces light losses in the optical system of the device. The traditional production process of lenses gluing involves the sequential execution of a set of technological operations and takes a ...
      2022-04-06

    • Method for variable low-density-parity check encoding 

      Shiman, D. V.; Patsei, N. V. (БНТУ, 2014)
      Предложен метод для динамического изменения параметров кодов низкой плотности проверок на четность в соответствии с показателем качества канала связи. Рассмотрено устройство для хранения, динамического выбора проверочной матрицы и корректирующего кодирования. Представлены результаты моделирования характеристик низкоплотностных кодов с переменными параметрами, которые доказывают ...
      2015-07-24

    • Method of estimation of frequency variation relying on estimation of shift of spectral peaks 

      Kechik, D. A.; Aslamov, Y. P.; Davydov, I. G. (БНТУ, 2021)
      Problem of estimation of variated frequency of components of polyharmonic signals has been arose. Three-dimensional time-frequency representation of signals is usually used to resolve this problem. But simple and reliable method of instantaneous frequency tracking is needed. Frequency tracking method based on estimation of shifts of peaks of spectrogram has been proposed in this ...
      2021-04-21

    • Methodics and tools of cough sound processing on basic of neural net 

      Vishniakou, U. А.; Shaya, B. H. (БНТУ, 2023)
      The purpose of the article is to analyze the methods and means of processing cough sounds to detect lung diseases, as well as to describe the developed system for classifying and detecting cough sounds based on a deep neural network. Four types of machine learning and the use of convolutional neural network (CNN) are considered. Hypermarkets of CNN are given. Varieties of machine ...
      2023-07-19

    • Methodology for Determining the Effective Thickness of the Cemented Layer of Steel 

      Sergei, G. S.; Aleksandr, L. V.; Sergej, P. R. (БНТУ, 2023)
      Highly loaded transmission gears are cemented and hardened. An important parameter of the hardened cemented layer is its effective thickness hef . Metal banding and the unavoidable instrumental error in hardness measuring have a great influence on the reliability of hef determination. The purpose of this article was to develop a methodology to improve the reliability of determining ...
      2023-08-15

    • Methodology of Defining of the Radiation Therapy Components for Various Methods of Patients’ Treating Using Medical Linear Accelerators and Gamma-Therapeutic Devices 

      Titovich, E. V.; Piatkevich, M. N.; Makarava, N. I. (БНТУ, 2020)
      One of the main factors affecting the effectiveness of radiation therapy is the constancy of the patient’s position on the treatment table created by immobilization devices of various designs and held throughout the entire irradiation procedure, which guarantees the accuracy of the delivery of the prescribed dose distribution. The purpose of the work was to establish the numerical ...
      2020-12-18

    • Methods for Accuracy Increasing of Solid Brittle Materials Fracture Toughness Determining 

      Lapitskaya, V. A.; Kuznetsova, T. A.; Chizhik, S. A.; Warcholinski, B. (БНТУ, 2022)
      Method for determining of the fracture toughness of brittle materials by indentation is described. The critical stress intensity factor KIC quantifies the fracture toughness. Methods were developed and applied to improve the accuracy of KIC determination due to atomic force microscopy and nanoindentation. It is necessary to accurately determine parameters and dimensions of the ...
      2022-04-06

    • Micro-joule cavity-dumped wavelength-tunable semiconductor disk laser 

      Savitski, V. G.; Calvez, S.; Dawson, M. D. (БНТУ, 2010)
      We report on cavity-dumping of a semiconductor disk laser as a method to generate energetic wavelength-tunable nanosecond pulses with repetition rates ranging from 0.1 to 4MHz. Experimentally, emission of 24ns pulses with peak output power of 41W in a single beam output (and of 30ns with peak power of 57W in a combined beam output) with wavelength tuning from 1045–1080nm was ...
      2012-03-23