Browsing 2020 by Submit Date

Now showing items 21-32 of 32

    • Determination of Flow Characteristics in Technological Processes with Controlled Pressure 

      Reader, T.; Tenenev, V. A.; Chernova, A. A. (БНТУ, 2020)
      Assessment of the environmental and economic performance of a safety valve requires information about the flow of the substance through the valve when it is actuated. The goal of this paper was to determine the flow rate of the discharged substance and the mass flow rate of the substance entering the safety valve when it is actuated. Proposed a mathematical model to describe the ...
      2020-09-18

    • Features of Measuring the Hardness of a Metal Surface Modified with Ultrafine Particles of Minerals 

      Skazochkin, A. V.; Bondarenko, G. G.; Zukowski, P. (БНТУ, 2020)
      One of the important characteristics of the surface properties of metal parts subjected to friction is hardness. Hardness measurements are important for determining the operational characteristics of parts and monitoring the technological regimes of surface modification. However, hardness measurements of thin modified layers made by different methods can lead to differences in ...
      2020-09-18

    • Determination of Parameters of Electrode Metal Transported Drops by Simulation and Visualization 

      Ilyaschenko, D. P.; Kryukov, A. V.; Lavrova, E. V.; Kuznetsov, M. A.; Verkhoturova, E. V. (БНТУ, 2020)
      The nature of the molten electrode metal melting and transfer is the main process parameter of manual metal arc welding (MMA) with coated electrodes. It significantly affects the efficiency of the welding process. For this reason the relevant task is to identify the parameters of the transferred molten electrode metal drops and their further transfer into the weld pool with maximum ...
      2020-09-18

    • Application of Two-Channel Principle in Measuring Devices to Compensate for Disturbing Influences of Unknown Physical Nature 

      Nesterov, V. N.; Li, A. R. (БНТУ, 2020)
      The article notes the advantages of the method of constructing absolutely invariant measuring transducers for working in conditions with disturbing influences. However, this method is not universal. Its limitations are due to the impossibility of "symmetric" transmission of all disturbing influences into parallel measuring channels. A broader interpretation of the two-channel ...
      2020-09-18

    • Analysis of Requirements and the Feasible Limit for Error Reduction in Two-Parameter Magnetic Determination of Steels’ Hardness 

      Sandomirski, S. G. (БНТУ, 2020)
      All measurements of mechanical properties of materials in the magnetic structural analysis are indirect and relationships between the measured parameters are correlated. An important physical parameter of steel is hardness. An increase in the correlation coefficient R and a reduction in the standard deviation (SD) are achieved when controlling the hardness of steels with two-parameter ...
      2020-09-18

    • Контраст изображения объекта, наблюдаемого в условиях задымления, при поляризационной фильтрации излучения, рассеянного частицами дыма 

      Кицак, А. И. (БНТУ, 2020)
      Целью работы являлось исследование контраста изображения объекта, наблюдаемого в задымленной среде, с применением поляризационной фильтрации излучения, рассеянного частицами дыма в сторону наблюдателя, и сопоставление данного контраста с контрастом изображения, формируемого без фильтрации, для оценки возможности разработки комплекта оптических принадлежностей пожарного-спасателя, ...
      2020-09-18

    • In-Band Pumped Continuous-Wave Lasers Based on Ho:KY(WO4)2 Crystal and Ho:KGdYbY(WO4)2 Epitaxial Layer 

      Dernovich, O. P.; Gusakova, N. V.; Kisel, V. E.; Kravtsov, A. V.; Guretsky, S. A.; Pavlyuk, A. A.; Kuleshov, N. V. (БНТУ, 2020)
      2 μm lasers are in demand for a number of practical applications, such as environmental monitoring, remote sensing, medicine, material processing, and are also used as a pump sources for optical parametric generators. Crystals of double potassium tungstates doped with ions of rare-earth elements were shown to be promising materials both for the creation of classical solid-state ...
      2020-12-18

    • Smartphone-Based Automated Non-Destructive Testing Devices 

      Petryk, V. E.; Protasov, A. G.; Galagan, R. M.; Muraviov, A. V.; Lysenko, I. I. (БНТУ, 2020)
      Currently, non-destructive testing is an interdisciplinary field of science and technology that serves to ensure the safe functioning of complex technical systems in the face of multifactorial risks. In this regard, there is a need to consider new information technologies based on intellectual perception, recognition technology, and general network integration. The purpose of ...
      2020-12-18

    • 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

    • 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

    • 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

    • Возможности зондирования вариаций плотности верхней атмосферы и сейсмоорбитальных эффектов с помощью малоразмерных космических аппаратов 

      Тертышников, А. В. (БНТУ, 2020)
      Миниатюрные космические аппараты обладают высоким баллистическим коэффициентом, что выгодно для разрешающей способности зондирования плотности верхней атмосферы. Цель данной работы – показать новые возможности «метода падающих сфер» на основе миниатюризации космических аппаратов. «Метод падающих сфер» используется для зондирования вариаций плотности верхней атмосферы. Рассмотрено ...
      2020-12-18