Наукові статті

Постійне посилання на фондhttps://repositary.knuba.edu.ua/handle/987654321/30

Переглянути

Результат пошуку

Зараз показуємо 1 - 2 з 2
  • Документ
    Development of models of the electromagnetic environment in buildings and urbanized areas
    (Технологічний центр, 2022-12-30) Levchenko, Larysa; Ausheva, Nataliia; Burdeina, Nataliia; Aznaurian, Iryna; Biruk, Yana; Kasatkina, Nataliia; Matvieieva, Iryna; Nazarenko, Vasyl; Nikolaiev, Kyrylo; Tykhenko, Oksana
    A set of measures and means to control the electromagnetic situation of the environment in the territories of urban development, in buildings and individual premises has been substantiated and developed. The simulation tools show the ability to rationalize the parameters of overhead lines with voltages of 220 kV and below, which will reduce the electromagnetic load in the territories. Modeling the propagation of fields from underground high-voltage lines has established that the values of magnetic fields compared to overhead lines are lower up to 30 times. Models of propagation of electromagnetic fields of very high and ultrahigh frequency were built. Sources of electromagnetic fields of non-production origin in industrial buildings have been investigated. Uncompensated currents in power networks with nonlinear electric consumers generate magnetic fields by induction of 0.35–1.20 μT, which exceeds the maximum permissible levels of operation of computer equipment. Leakage currents on grounded metal structures generate magnetic fields with 1.52–6.75 μT. Simulation of the propagation of electric and magnetic fields of components of personal computers of controlled ranges according to the MPRII standard was carried out. Models of propagation of the magnetic field of industrial frequency around electric motors and generators with their cross sections were built. On the basis of such models, design schemes for placing equipment in production areas are selected or places of safe stay and movement of personnel are selected. The expediency of using shielding to reduce field levels to safe values due to coating surfaces with liquid protective mixtures was shown. Metal-containing composition based on water-dispersion paint makes it possible to reduce the level= of magnetic field of industrial frequency by 2.5–2.6 times, electric field by 1.6–1.7 times, electromagnetic field of industrial frequency – by 1.2–1.3 times.
  • Документ
    Intelligent information technologies implementation to the process of professional self-identification
    (CEUR Workshop Proceedings, 2012-03) Aznaurian, Iryna; Yeremenko, Bohdan; Riabchun, Yuliia; Ploskiy, Vitalii; Mezzane, Daoud; Kryvinska, Natalia
    The latest learning technologies implementation, based on new approaches to the presentation and acquisition of knowledge, requires appropriate modern methods of assessment. The search for perfect methods for assessing the abilities of entrants and students at the present stage of information technology development is extremely important, because the objectification of the assessment process, providing feedback, provides an opportunity to coordinate the development of personality. The main attention in this paper is directed on the decision of questions of professional orientation by means of testing which assumes performance of game tasks of a professional direction. The research presents a conceptual model of a specialized intelligent system, which is designed to support the decision of the applicant to choose a specialty of higher education institution of construction profile. The paper also shows fragments of the system with professional game tasks, which reflect the level of spatial imagination of the individual and the ability to perform functional duties in accordance with the personnel requirements of different professions of construction. The formation scheme of the recommendatory conclusion on results of performance of these tasks is offered the mechanism of fuzzy inference of the recommendatory conclusion is shown. Clear and fuzzy criteria are proposed that can be used to justify the recommendation conclusion. The possibility of using the fuzzy artificial neural network Takagi-Sugeno-Kang to setup the parameters of the model used to reflect certain professional abilities of the individual is shown.