Browsing Приборы и методы измерений by Title

Now showing items 89-108 of 490

    • 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 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

    • 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

    • 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

    • Modeling of an Impact of Thin Insulating Film on the Electrode Surface on Discharge Ignition in Mercury Illuminating Lamps at Low Ambient Temperatures 

      Bondarenko, G. G.; Fisher, M. R.; Kristya, V. I.; Zukowski, P. (БНТУ, 2019)
      The mixture of argon and mercury vapor with temperature-dependent composition is used as the background gas in different types of gas discharge illuminating lamps. The aim of this work was to develop a model of the low-current discharge in an argon-mercury mixture at presence of a thin insulating film on the cathode and to investigate the influence of film on the discharge ignition ...
      2019-03-15

    • Monte Carlo Simulation of Flash Memory Elements’ Electrophysical Parameters 

      Zhevnyak, O. G.; Borzdov, V. M.; Borzdov, A. V.; Petlitsky, A. N. (БНТУ, 2022)
      Operation of modern flash memory elements is based on electron transport processes in the channel of silicon MOSFETs with floating gate. The aim of this work was calculation of electron mobility and study of the influence of phonon and ionized impurity scattering mechanisms on the mobility, as well as calculation of parasitic tunneling current and channel current in the conductive ...
      2022-12-29

    • Nanostructured Coatings Based on Langmuir–Blodgett Films of Perfluorodecanoic Acid for Flexible Sensors for the Analysis of Lead Ions in Water 

      Melnikova, G. B.; Sapsaliou, D. V.; Tolstaya, T. N.; Korolkov, I. V.; Chizhik, S. A.; Zhumanazar, N. N.; Baranova, A. S.; Zdorovets, M. V. (БНТУ, 2024)
      As a result of anthropogenic activities, the environment is polluted by heavy metals. The most important task is to find methods to control their content in water. Track-etched membranes (TeMs) can be relatively easily modified by nanometer layers of functional materials with using the Langmuir‒Blodgett technique, which makes it possible to specifically change the structural, ...
      2024-05-23

    • Negative Ion Beam Emittance Calculations 

      Turek, M.; Wegierek, P. (БНТУ, 2020)
      Computer simulations are commonly used to support design and optimisation of powerful negative ion sources for the needs of future thermonuclear reactors like e. g. ITER. The aim of the paper was to study changes of produced beam quality (described by its emittance and brightness) with the geometry of the extraction system as well as extraction voltage. A two-dimensional ...
      2020-03-17

    • Non-Additive Quantity Measurement Model 

      Romanchak, V. M.; Serenkov, P. S. (БНТУ, 2022)
      This work considers a model for measuring non-additive quantities, in particular a model for subjective measurement. The purpose of this work was to develop the measurement theory and form of a measurement model that uses the corrected S. Stevens measurement model. A generalized structure was considered that included an empirical system, a mathematical system, and a homomorphism ...
      2022-11-11

    • 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

    • Numerical simulation of electric characteristics of deep submicron silicon-on-insulator MOS transistor 

      Borzdov, A. V.; Borzdov, V. M.; Dorozhkin, N. N. (БНТУ, 2016)
      На сегодняшний день субмикронные МОП-транзисторные структуры кремний-на-изоляторе (КНИ) широко используются в различных электронных устройствах, а также могут применяться в качестве сенсорных элементов. Разработка приборов с заданными характеристиками на основе этих структур невозможна без компьютерного моделирования их электрических свойств. Для глубокосубмикронных транзисторных ...
      2016-09-11

    • Optimization of the Emitting Coil of a Hardware-Software Complex for Study of Low-Frequency Electromagnetic Radiation’s Shielding Effectiveness 

      Kanafyev, O. D.; Trukhanov, A. V.; Zubar, T. I.; Chizhik, S. A.; Grabchikov, S. S. (БНТУ, 2021)
      Optimization of the radiation coil of the hardware-software complex for studying the effectiveness of shielding of low-frequency electromagnetic radiation will make it possible to assess the effectiveness of shielding coatings at a higher level. This fact will make it possible to develop coatings with improved characteristics. The purpose of this work was to determine the optimal ...
      2021-03-18

    • Output Characteristics of Graphene Field Effect Transistors 

      Mishchenka, V. N. (БНТУ, 2020)
      The use of graphene, which has high mobility of charge carriers, high thermal conductivity and a number of other positive properties, is promising for the creation of new semiconductor devices with good output characteristics. The aim was to simulate the output characteristics of field effect transistors containing graphene using the Monte-Carlo method and the Poisson equation. ...
      2020-12-18

    • Parametric amplification of the signals in the electrostatic graviinertial sensor 

      Gilavdary, I.; Mekid, S.; Riznookaya, N. (БНТУ, 2017)
      The challenges of designing simple, reliable, and high sensitivity graviinertial sensors are investigated. The sensor comprises a proof mass (PM) and is fixed with the housing by the elastic torsion suspension. PM makes small rotations under the action of gravitational forces or inertial forces. The distinctive features of the sensor are that the differential electrostatic system ...
      2017-06-09

    • A passively modelocked Cr4+: forsterite laser with electronically controlled output characteristics for novel imaging and manipulation systems 

      Zolotovskaya, S. A.; Wilcox, K. G.; Abdolvand, A.; Livshits, D. A.; Rafailov, E. U. (БНТУ, 2011)
      Applicability of electronic control of laser output parameters to bulk solid-state laser sources is demonstrated. A single laser source with variable pulse duration for novel imaging and manipulation systems is presented. Stable passive mode-locking of a Cr4+:forsterite laser using a voltage controlled p-n junction quantum dot saturable absorber was achieved. Output shortening ...
      2012-03-26

    • Peculiarities of Optoacoustic Excitation and Propagation of Plate Waves in Thin-Walled Оbjects 

      Baev, A. R.; Metskovets, A. I.; Mayorov, A. L.; Asadchaya, M. V.; Vorobey, A. V. (БНТУ, 2023)
      Increasing the efficiency of non-destructive control of lamellar materials with single and double-layer structure is an urgent scientific and technical task. The aim of the work was to investigate the peculiarities of excitation and reception of plate waves (PW) in single-layer and two-layer materials by pulsed laser radiation in relation to detection of cracks in them and ...
      2023-12-12