Browsing Сериальные издания by Title

Now showing items 124-143 of 7869

    • Ensuring Requirements for Emissions of Harmful Substances of Diesel Engines 

      Kuharonak, G. M.; Kapskiy, D. V.; Berezun, V. I. (БНТУ, 2020)
      The purpose of this work is to consider the requirements for emissions of harmful substances of diesel engines by selecting design and adjustment parameters that determine the organization of the workflow, and the exhaust gas cleaning system, taking into account the reduction of fuel consumption. Design elements and geometric characteristics of structures for a turbocharged diesel ...
      2020-08-04

    • Er,Yb:Ca3RE2(BO3)4 (RE=Y, Gd) – Novel 1.5 μm Laser Crystals 

      Gorbachenya, K. N.; Deineka, R. V.; Kisel, V. E.; Yasukevich, A. S.; Shekhovtsov, A. N.; Kosmyna, M. B.; Kuleshov, N. V. (БНТУ, 2019)
      The search for new crystalline host materials for the usage in lasers emitting in the eye-safe spectral range of 1.5–1.6 μm is an important task. The aim of this work was to study the growth technique, spectroscopic properties and laser characteristics of new active media – crystals Er3+,Yb3+:Ca3RE2(BO3)4 (RE=Y, Gd). Calcium-yttrium Er3+,Yb3+:Ca3Y2(BO3)4 (CYB) and calcium-gadolinium ...
      2019-03-15

    • Evaluation of Evaporative Degradation of Arc Torch Cathodes in Hydrocarbon-Containing Plasmas for Spraying, Thermal Protection Testing and Related Technologies 

      Gorbunov, A. V.; Gorbunova, V. A.; Devoino, O. G.; Petraconi, Filho G.; Halinouski, A. A. (БНТУ, 2022)
      Design of non-transferred DC electric arc plasma torches (EAPTs) operated with plasma gases containing alkane hydrocarbons, as a promising type of heaters for a number of technologies (thermal spraying, surface hardening, testing of thermal protection systems, etc.), requires taking into account the evaporation rate of surface cathode material (as one of the channels of its ...
      2022-06-09

    • Evaluation of Nonuniformity of Elastic Properties of Sheets Made from Closed-Сell Polyolefin Foams by Acoustic Method 

      Bogdan, O. P.; Zlobin, D. V.; Muraveva, O. V.; Molin, S. M.; Platunov, A. V. (БНТУ, 2021)
      The widespread use of polyolefin foams in strategically important industries is due to their high thermal, sound and vibration insulation properties. The aim of the work was to evaluate the non-uniformity of elastic properties over the area of sheets of polyolefin foams of various types using the acoustic non-contact shadow amplitude method of testing and confirmation by the ...
      2021-03-18

    • An Evaluation of Photovoltaic Systems MPPT Techniques under the Characteristics of Operational Conditions 

      Petrenko, Y. N.; Elzein, Imad A. (БНТУ, 2017)
      In this article an extended literature surveying review is launched on a set of comparative studies of maximum power point tracking (MPPT) techniques. Different MPPT methods are addressed with an ultimate aim of how to be maximizing the PV system output power by tracking Pmax in a set of different operational circumstances. In this paper maximum power point tracking, MPPT techniques ...
      2017-07-31

    • Evaluation of the Magnet Breakaway Force Measurement Accuracy of the NT-800 Sensors for Early Detection of Defects of Their Manufacturing 

      Kutsepau, A.; Kren, A.; Hnutsenka, Y. (БНТУ, 2021)
      Сontrol of mechanical stresses formed with the deposition of nickel coatings plays an important role in the diagnosis of coatings’ technical condition. Large internal stresses can lead to cracking or flaking of coatings which is completely unacceptable for critical parts and assembly units used, for example, in space technology for which reliability is of paramount importance. ...
      2021-10-18

    • Evaluation of the Magnet Breakaway Force Measurement Accuracy of the NT-800 Sensors for Early Detection of Defects of Their Manufacturing 

      Kutsepau, A.; Kren, A.; Hnutsenka, Y. (БНТУ, 2021)
      Сontrol of mechanical stresses formed with the deposition of nickel coatings plays an important role in the diagnosis of coatings’ technical condition. Large internal stresses can lead to cracking or flaking of coatings which is completely unacceptable for critical parts and assembly units used, for example, in space technology for which reliability is of paramount importance. ...
      2021-10-15

    • Exact and greedy algorithms of allocating experts to maximum set of programmer teams 

      Prihozhy, A. А. (БНТУ, 2022)
      The allocation of experts to programmer teams, which meet constraints on professional competences related to programming technologies, languages and tools an IT project specifies is a hard combinatorial problem. This paper solves the problem of forming the maximum number of teams whose experts meet all the constraints within each team. It develops and compares two algorithms: a ...
      2022-06-09

    • 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

    • Experimental Determination and Comparative Analysis of the PPH030GP, ABS and PLA Polymer Strength Characteristics at Different Strain Rates 

      Zalohin, M. Yu.; Skliarov, V. V.; Dovzhenko, Ja. S.; Brega, D. A. (БНТУ, 2019)
      Nowadays the field of application of products made from polymer materials is constantly increasing. These products find their wide application in the most high-tech industries such as automotive, aerospace and medical industry. Modern trends in the development of the automotive industry predicts that 75 % of the total car mass will be replaced with polymer materials by 2020 and ...
      2019-07-04

    • 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

    • Features of Controlling Electropneumatic Valves of Actuator to Control its Clutch with Acceleration Valve 

      Yaryta, O. А.; Mychalevych, M. G.; Leontiev, D. N.; Klymenko, V. I.; Bogomolov, V. A.; Gritsuk, I. V.; Novikova, Y. B. (БНТУ, 2018)
      The article deals with one of the ways to control an actuator of the automated clutch control system. The aim is to design control of the electropneumatic actuator, to control its coupling with the acceleration valve on the basis of experimental research as well as to provide rational parameters of the automated clutch control system for the robotic transmission. The feature of ...
      2018-02-09

    • 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

    • Features of the Behavior of a Plane Axisymmetric Magnetic Fluid Drop in a Nonmagnetic Solvent and a Uniform Magnetic Field 

      Bashtovoi, V. G.; Reks, A. G.; Zahadskaya, A. A. (БНТУ, 2022)
      The work is devoted to an experimental study of the process of dissolution of a magnetic fluid in a nonmagnetic solvent under the action of a uniform magnetic field. It is experimentally established that in a volume of magnetic fluid surrounded by a miscible solvent fluid, under the action of a uniform magnetic field, a mechanical movement arises, triggering deformation of this ...
      2022-12-08

    • Features of Аpplication of a Сombined Аpproach to the Еvaluation of the Мeasurement Results Uncertainty 

      Serenkov, P. S.; Hurevich, V. L.; Тоlochko, Т. К. (БНТУ, 2020)
      The article exposes description of features of the combined approach application to the evaluation of measurement results uncertainty. The aim of this work is the justification and development of new science-driven approaches to achieve maximum efficacy of measurements on the criteria "accuracy/costs" at the stated level of confidence. It provides theoretical base for correctness ...
      2020-03-17

    • Filter Kalman for solving the problem of coordinates UAV 

      Arefyev, N. N. (БНТУ, 2019)
      Unmanned aerial vehicles (UAVs) are increasingly used in military and scientific research. Some miniaturized UAVs rely entirely on the global positioning system (GPS) for navigation. GPS is vulnerable to accidental or deliberate interference that can cause it to fail. It is not unusual, even in a benign environment, for a GPS outage to occur for periods of seconds to minutes. For ...
      2019-07-09

    • Finite Element Method Analysis of Centreless-Lunette Turning of Heavy Shafts 

      Vasilevich, Yu. V.; Dounar, S. S. (БНТУ, 2017)
      Dynamics of heavy lathe tool ta be renovated has been simulated in the paper. Original turning scheme concerns finish-machining of large rotor shafts. High-positioned parts and a milling head may create dynamic problems. For this very reason FEM-simulation has been carried in static, modal and harmonic arrangements. A carrying system for shaft support consists of a bed, a support, ...
      2017-05-29

    • Flight Path Control for Unmanned Aerial Vehicle 

      AL-Mashhadani, М. А. (БНТУ, 2014)
      Проведено исследование оптимизированного по заданному критерию закона управления беспилотного летательного аппарата при наведении его по траектории, заданной опорными точками в инерциальной системе координат. Приводится пример, иллюстрирующий работоспособность предложенных теоретических положений.
      2014-12-17

    • Forecasting the Risk of Bankruptcy in Poorly Formalized Processes 

      Gaibnazarova, Z. T.; Solieva, B. T.; Iminova, N. A. (БНТУ, 2024)
      There is a class of complex systems characterized by dynamism, multi-link structural elements, multi-stage, multi-linked chain of processes. Moreover, each of these processes occurs under conditions of stochastic and non-stochastic uncertainty in the initial information, internal and external environment, which predetermine the uncertainty of the nature of the development of the ...
      2024-02-06

    • Formalization of the problem of selection of automated system 

      Petukhov, A. V. (БНТУ, 2018)
      The results of many years of research in the field of formalizing the task of selecting automated systems for various areas of design and office activities are given. The purpose of the study is the development of methods for qualitative and quantitative evaluation when choosing an automated system, taking into accounts the operating conditions and customer requirements. Qualitative ...
      2018-06-12