Browsing Приборы и методы измерений by Title

Now showing items 97-116 of 483

    • 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

    • Photospectral Data Obtaining with the Unmanned Aerial Spectrometry Vehicle 

      Lamaka, A. A.; Gutarau, A. V.; Shcherbakou, N. G.; Ivuts, P. V. (БНТУ, 2023)
      Study of the Earth’s surface objects reflectance characteristics with unmanned aerial vehicles is one of the most actual remote sensing trends. Aim of this work was to develop a method for obtaining of photospectral data using unmanned aerial spectrometry vehicle. An adaptation of the cameras spatial resolution evaluating technique based on a specialized target photographic ...
      2023-04-13

    • Possibilities of Using of Surface and Subsurface Waves’ Amplitude-Angle Characteristics for Control of Materials with Surface-Hardened Inhomogeneous Layer 

      Baev, A. R.; Asadchaya, M. V.; Mayorov, A. L.; Sergeeva, O. S.; Delenkovsky, N. V. (БНТУ, 2022)
      Improving the efficiency of ultrasonic control of hardened surface layers of metal products with a heterogeneous structure obtained using different technologies is a pressing problem of industrial production. The purpose of this work was to investigate the possibilities of measuring the depth of the surface inhomogeneous layer of steel objects on the basis of the use of amplitude ...
      2022-12-29

    • Prediction of Dynamic Characteristics of Thermocouples with Thin-Wire Sensing Elements 

      Safina, I. A.; Artemyeva, S. A. (БНТУ, 2022)
      Thermocouples dynamic characteristicsʼ prediction is one of the relevant directions in the field of dynamic measurements of non-stationary temperatures of liquid and gaseous media. Thermocouples dynamic characteristicsʼ prediction makes it possible to provide effective continuous correction in automatic control systems for non-stationary temperatures. The purpose of this paper ...
      2022-07-05

    • Probability of Erroneous Data Registration in a Single Photon Erasure-Type Communication Channel with a Receiver Based on a Photon Counter 

      Timofeev, A. M. (БНТУ, 2022)
      When measuring low-power optical signals, it is necessary to ensure the highest reliability of the received data, which is especially important for single-photon communication channels. This determines the expediency of using photon counters as receiving modules for such channels. They are highly sensitive, but are characterized by data recording errors. Therefore, the purpose ...
      2022-07-06

    • Pulsed KGd(WO4)2 Raman laser: towards emission linewidth narrowing 

      Savitski, V. G. (БНТУ, 2015)
      The linewidth of a KGd(WO4)2 pulsed Raman laser is analysed experimentally for different configurations of the Raman and pump resonators: with narrow and broadband pump emission profiles, with and without linewidth narrowing elements in the Raman laser resonator, with and without injection seeding into the Raman cavity. The benefits of a narrow linewidth pump source in combination ...
      2015-07-24

    • Rationale for the Choice of the Ellipsoidal Reflector Parameters for Biomedical Photometers 

      Bezuglaya, N.; Haponiuk, A.; Bondariev, D.; Poluectov, S.; Chornyi, V.; Bezuglyi, M. (БНТУ, 2021)
      Biomedical photometersʼ information-measuring systems with ellipsoidal reflectors have acceptable results in determining of biological tissues optical properties in the visible and near-infrared spectral range. These photometers make it possible to study the optical radiation propagation in turbid media for direct and inverse problems of light-scattering optics. The purpose of ...
      2021-12-21

    • Refractive index determination for a plane dielectric layer using the measurements of transmitted beam intensity 

      Serdyuk, V. M.; Titovitsky, J. A. (БНТУ, 2017)
      The aim of the present work is the theoretical justification of new refractive index determination technique for a homogeneous transparent plane dielectric layer. It uses intensity measurements for two polarizations of transmitting electromagnetic beam and does not take into consideration phase relationships and phase parameters of testing field at unknown thickness of a layer. ...
      2017-03-02

    • Research of Digital Camera Dynamic Range on the Imaging Processing Basis 

      Sutkowski, M.; Saukova, Ya. (БНТУ, 2017)
      Digital images provide to determine photometric and colorimetric properties of objects subject to validation all elements of a measuring channel (digital camera, software, display) and solve the problem of their limited dynamic ranges. The aim of the study was to explore the dynamic range of a digital camera for use in photometric and colorimetric measurements. The Laboratory of ...
      2017-09-04

    • Research of Surface Wear Resistance of Aluminum Alloy Modified with Minerals using Sclerometry Method 

      Skazochkin, A. V.; Bondarenko, G. G.; Zukowski, P. (БНТУ, 2019)
      Improving the wear resistance of the surface of metal parts used in various industries is one of the relevant areas of materials science. The aim of this work was a comparative study of the wear resistance of a sample of an aluminum alloy (EN AW-2024, an aluminum alloy of the Al-Cu-Mg system) modified with ultrafine particles of minerals using the sclerometry method, which makes ...
      2019-09-16

    • Research of ultrasonic sensing and mixing elements for control of magnetorheological fluids stability 

      Dragasius, E.; Jurenas, V.; Maciukiene, V.; Mazeika, D. (БНТУ, 2011)
      Using of magnetorheological fluids (MRF) can reduce energy costs and weight and increase the devices speed and lifetime. In order to fully use all the qualities of MRF properties one must from time to time mix them and measure their properties. These systems are still being designed and tested in the laboratories. There are many structures with rheological fluid, but in many ...
      2012-03-27

    • 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