Browsing 2021 by Issue Date

Now showing items 1-20 of 38

    • Influence of Geometry and Boundary Conditions in Area of the Cohesion between Materials on the Reflection of an Ultrasonic Beam. Part 2. Features of Experimental Simulation 

      Baev, A. R.; Levkovitch, N. V.; Asadchaya, M. V.; Mayorov, A. L.; Razmyslovich, G. I.; Burnos, A. Y. (БНТУ, 2021)
      Improving the efficiency of diagnostics of objects with layered structure as applied to detection of poorly detectable material bonding defects is an important production task. The aim of the work was to experimentally simulate ultrasonic scattering by samples of proposed defect simulator designs with discretely and smoothly varying boundary conditions correlating with the phase ...
      2021-12-22

    • Impulsively-Laser Excitation and Propagation of Ultrasonic Waves through Nanomagnetic Fluid 

      Baev, A. R.; Mitkovets, A. I.; Asadchaya, M. V.; Mayorov, A. L. (БНТУ, 2021)
      Magnetic fluids belong to the class of nanomaterials with a high gain of light absorption, aggregative and sedimentation stability as well as controllability by external fields, which is of interest to use in the field of optoacoustics. The purpose of the work was to experimentally study the effect of the optoacoustic transformation in a magnetic fluid, depending on the concentration ...
      2021-10-18

    • Application of Electrical Impedance Measurements’ Method for Studies of Bubble Flows 

      Konovalov, I. A.; Chesnokov, A. A.; Barinov, A. A.; Dmitriev, S. M.; Khrobostov, A. E.; Makarov, M. A. (БНТУ, 2021)
      One of the important tasks in carrying out a computational justification of the reliability and safety of equipment that is part of the projected nuclear power plants today is the modeling of the bubbly regime of the coolant flow. In this regard the aim of this work is the use of extended methods of using matrix conductometric systems which are widespread in research practice for ...
      2021-10-14

    • Improving of Surface Quality of Metal Reflector Mirrors Machined by Single Point Diamond Turning 

      Gusakov, G. A.; Sharonov, G. V. (БНТУ, 2021)
      Improving the technology of diamond turning of aluminum alloys is of great importance for expanding the application areas of metal-optical products based on aluminum in aerospace technology. The aim of this work was to study the effect of surface inhomogeneities of the initial aluminum alloy substrates on their optical and mechanical characteristics and to determine ways of ...
      2021-07-08

    • High Power Diode-Pumped Erbium Laser Emitting at Near 1.5 μm 

      Gorbachenya, K. N.; Kisel, V. E.; Yasukevich, A. S.; Koporulina, E. V.; Volkova, E. A.; Maltsev, V. V.; Leonyuk, N. I.; Kuleshov, N. V. (БНТУ, 2021)
      Solid-state lasers emitting in the 1.5–1.6 μm spectral range are very promising for eye-safe laser range finding, ophthalmology, fiber-optic communication systems, and optical location. The aim of this work is the investigation of spectrosposcopic and laser properties of gain medium based on borate crystal for abovementioned lasers. Spectroscopic and laser properties of ...
      2021-07-06

    • Influence of Geometry and Boundary Conditions in Area of Cohesion between Materials on the Reflection of an Ultrasonic Beam. Part 1. Theoretical Research 

      Bayev, A. R.; Mayorov, A. L.; Levkovich, N. V.; Shavlovskiy, D. V.; Asadchaya, M. V. (БНТУ, 2021)
      The improvement of efficiency, reliability and productivity of ultrasonic testing of objects with cohesion between materials connected by welding, soldering, gluing, etc. is 'an important problem of the modern production technologies. The purpose of the paper is to determine in 3D space the conditions for increasing the sensitivity and reliability of the flaw detection in the ...
      2021-07-07

    • Deep Learning Automated System for Thermal Defectometry of Multilayer Materials 

      Momot, A. S.; Galagan, R. M.; Gluhovskii, V. Yu. (БНТУ, 2021)
      Currently, along with growth in industrial production, the requirements for product quality testing are also increasing. In the tasks of defectoscopy and defectometry of multilayer materials, the use of thermal nondestructive testing method is promising. At the same time, interpretation of thermal testing data is complicated by a number of factors, which makes the use of traditional ...
      2021-07-07

    • Designing a Planar Fluxgate Using the PCB Technology 

      Kolomeitsev, A. A.; Zatonov, I. A.; Pischanskaya, M. I.; Baranov, P. F.; Ilyaschenko, D. P.; Verkhoturova, E. V. (БНТУ, 2021)
      The development of novel methods, scientific devices and means for measuring magnetic fields generated by ultra-low current is among promising directions in the development of medical equipment and instruments for geodetic surveys and space exploration. The present work is to develop a small sensor capable of detecting weak magnetic fields, which sources are biocurrents, radiation ...
      2021-07-07

    • Series of Photovoltaic Converters Based on Semiconductors with Intrinsic Photoconductivity 

      Vorobey, R. I.; Gusev, O. K.; Zharin, A. L.; Pantsialeyeu, K. U.; Svistun, A. I.; Tyavlovsky, A. K.; Tyavlovsky, K. L.; Shadurskaya, L. I. (БНТУ, 2021)
      One of the ways to solve multiple problems of optical diagnostics is to use photovoltaic converters based on semiconductors with intrinsic photoconductivity slightly doped with deep impurities which form several energy levels with different charge states within the semiconductor′s bandgap. Peculiarities of physical processes of recharging these levels make it possible to construct ...
      2021-07-07

    • Измерение вероятности стирания двоичного символа «0» в однофотонном асинхронном канале связи с приёмником на основе счётчика фотонов 

      Тимофеев, А. М. (БНТУ, 2021)
      При измерении маломощных оптических сигналов приёмные модули каналов однофотонной связи должны обеспечивать наименьшие потери передаваемой информации. В этой связи целесообразно использовать счётчики фотонов, которые являются высокочувствительными, однако характеризуются ошибками регистрации данных. Поэтому цель работы – исследовать влияние интенсивности регистрируемого оптического ...
      2021-07-08

    • Nonlinear Pulse-Time Conversion in Radioisotope Devices: Analysis and Application Possibilities 

      Vodovozov, A. М. (БНТУ, 2021)
      The paper considers the operation of radioisotope measuring devices under dynamic conditions, when the Poisson pulse flux at the output of the radiation detector becomes unsteady and the nonlinearity of the calibration curve of the device, the stochasticity of the radiation signal and the inertia of the meter significantly complicate the task of estimating the measured physical ...
      2021-07-08

    • Структурные решения, обеспечивающие увеличение динамической точности волнового твердотельного гироскопа 

      Малютин, Д. М. (БНТУ, 2021)
      Разработка волновых твердотельных гироскопов (ВТГ) является одним из перспективных направлений развития гироскопических датчиков угловой скорости. ВТГ с позиций технологии изготовления, системы настройки и управления, а также точностных характеристик имеет ряд преимуществ по сравнению с другими видами гироскопов. При разработке ВТГ стремятся уменьшить собственный уход гироскопа, ...
      2021-07-08

    • Expanding of Excimer Laser Photoablation’s Functionality in Ophthalmology 

      Alekseev, V. A.; Kostin, V. G.; Usoltseva, A. V.; Usoltsev, V. P.; Yuran, S. I. (БНТУ, 2021)
      One of the significant weaknesses of excimer laser-based vision correction devices is the difficulty of achieving a required change in the refractive properties of the cornea to sharply focus the image on the retina with distance from the working area (ablation zone) center to the periphery due to a change in the laser beam incidence angle. The study is aimed at improving the ...
      2021-10-14

    • Calculation of the Effective Energy Release Centerʼs Position of Inorganic Scintillation Detectors for Calibration at Small “Source–Detector” Distances 

      Lukashevich, R.; Fokov, G. (БНТУ, 2021)
      Inorganic scintillation detectors are widely used to measure of dose rate in the environment due to their high sensitivity to photon radiation. A distinctive feature when using such detectors is the need to take into account of the position of the effective energy release center. This peculiarity is actual when using measuring instruments with inorganic scintillation detectors ...
      2021-10-15

    • Low-Frequency Admittance of Capacitor with Working Substance “Insulator – Partially Disordered Semiconductor – Insulator” 

      Poklonski, N. A.; Anikeev, I. I.; Vyrko, S. A. (БНТУ, 2021)
      The study of the electrophysical characteristics of crystalline semiconductors with structural defects is of practical interest in the development of radiation-resistant varactors. The capacitance-voltage characteristics of a disordered semiconductor can be used to determine the concentration of point defects in its crystal matrix. The purpose of this work is to calculate the ...
      2021-10-15

    • Autonomous Streaming Space Objects Detection Based on a Remote Optical System 

      Baranova, V. S.; Saetchnikov, V. A.; Spiridonov, A. A. (БНТУ, 2021)
      Traditional image processing techniques provide sustainable efficiency in the astrometry of deep space objects and in applied problems of determining the parameters of artificial satellite orbits. But the speed of the computing architecture and the functions of small optical systems are rapidly developing thus contribute to the use of a dynamic video stream for detecting and ...
      2021-12-22

    • Application of the Correlation Measurement Method for Reconstructing of the Velocity Profile with Spatial and Temporal Discretization in Studies of the Hydrodynamics of Turbulent Flows Based on the Matrix Conductometry Method 

      Dmitriev, S. M.; Khrobostov, A. E.; Solncev, D. N.; Barinov, A. A.; Chesnokov, A. A.; Konovalov, I. A.; Makarov, M. A.; Zyryanova, T. K. (БНТУ, 2021)
      The correlation method for measuring of the coolant flow rate is used in the operation of nuclear power plants and is widespread in research practice including study of turbulent flows hydrodynamics. However the question of its applicability and possibilities in studies using the matrix conductometry method remains open. Earlier the algorithm for determining of the correlation ...
      2021-12-22

    • Design of Peltier Element Based on Semiconductors with Hopping Electron Transfer via Defects 

      Poklonski, N. A.; Vyrko, S. A.; Kovalev, A. I.; Anikeev, I. I.; Gorbachuk, N. I. (БНТУ, 2021)
      The study of thermoelectric properties of crystalline semiconductors with structural defects is of practical interest in the development of radiation-resistant Peltier elements. In this case, the spectrum of energy levels of hydrogen-like impurities and intrinsic point defects in the band gap (energy gap) of crystal plays an important role. The purpose of this work is to analyze ...
      2021-03-18

    • Experimental Installation for Determination of Attenuation Coefficient of Permanent Magnetic Field by Protective Materials 

      Fedosyuk, V. M. (БНТУ, 2021)
      The permanent magnetic field in addition to electromagnetic radiation has a significant effect on performance of devices. This is particularly true for highly sensitive precision measuring equipment, such as, for example, magnetometers or photomultiplier tubes. In this regard a new high-performance materials for protection against permanent fields and electromagnetic radiation ...
      2021-03-18

    • Фемтосекундная лазерная система с импульсной накачкой генератора и усилителя при использовании одного силового блока 

      Тихомиров, С. А. (БНТУ, 2021)
      Уже на протяжении нескольких десятилетий развитие методов генерации сверхкоротких импульсов является самостоятельной актуальной научно-технической задачей. Идёт постоянное совершенствование как способов получения импульсов, так и методов их использования. Целью данной работы являлось исследование возможности реализации согласованной работы двух принципиально разных типов лазеров ...
      2021-03-18