Browsing by Author "Gololobova, Oksana O."

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    Analysis and Research of the Causes and Course of Degradation of Lithium Batteries
    (EDP Sciences-Web of conferences, 2024) Buriak, Serhii Yu.; Gololobova, Oksana O.; Havryliuk, Volodymyr I.; Serdiuk, Tetiana M.; Voznyak, Oleh M.; Manachyn, Ivan O.
    ENG: Energy storage devices based on lithium technology are confidently leading the respective market due to their significant advantages over other technologies in the industry. Despite their relatively recent history of appearance, they managed to undergo many modifications of both physical and chemical components. One of the constant goals of all research in this field is the formation of knowledge about the degradation processes occurring inside a given chemical current source, and ways to influence them. Systematization and identification of the fundamental reasons for the decrease in the performance of lithium batteries still remains a topical issue of today, and therefore is considered in this article. And no matter how studied this issue looks, taking into account the existing many long-term experimental data of a huge number of scientists and a number of different types of companies, but still, optimization of work is impossible without identifying and eliminating as many destructive factors as possible in battery operation. The difficulty of this process lies also in the fact that, taking into account all the high-tech production processes in the world, there are no two identical lithium current sources. On the example of a single battery, the ability to maintain high performance, close to nominal, was demonstrated from a source that, due to its lifetime, should not have had them. The data obtained during the experiment, which confirmed the high performance, show once again that the issue of degradation of lithium current sources can and should be studied further.
  • Thumbnail Image
    Item
    Evaluation and Control of Data Relevance in Information Systems of the Transport Industry Management
    (Dnipro University of Technology, Dnipro, Ukraine, 2023) Klius, Yu. I.; Prodanchuk, M. A.; Gololobova, Oksana O.; Halan, L. V.; Varhatiuk, M. O.
    ENG: Purpose. Analysis of data coming to the information systems (IS) of the transport area (TA) and development of proposals for verification of their relevance to ensure reliability and efficiency of management. Development of the evaluation and control method of data relevance in information systems of the TA. Methodology. Special and general methods of scientific knowledge are used: critical analysis to establish scenarios of the impact of data relevance on the level of effective interaction of the elements of the system and its management; content analysis for stratification of requirements for data from IS and management decisions at the stage of analysis; mathematical formalization for the development of the data evaluation method and control of their relevance, which is proposed as the mathematical base of the algorithm; method of sequential selection for automatic detection of functional dependence, which describes data with a smaller value of standard error. Findings. Proposals to ensure data relevance have been developed. Data and management decision stratification has been proposed which will allow avoiding common errors due to non-normalization of data presentation. The scenarios of the impact of data relevance on the level of effective interaction of the elements of the transport system and its management have been established. For permanent data control, an algorithm for detecting deviations in consecutive data sets, automatic analysis of specified deviations, and detection of univariate and multivariate nonlinear patterns that cause deviations has been proposed. In case of inconsistencies of data with the identified non-linear patterns, the information is checked by the method of evolutionary programming. The effectiveness of the proposed methods is demonstrated using the example of analysis of the cargo turnover of seaports whose trends are characterized by significant changes over time and across ports. These trends may even have opposite characteristics. Originality. The method of data evaluation and control of their relevance, which is based on the methods of evolutionary (“genetic”) programming, is developed. Practical value. Proposals for evaluation and control of data relevance in information systems of the TA will increase the efficiency of management activities.
  • Thumbnail Image
    Item
    Features of Electromagnetic Compatibility in Railway Transport
    (IEEE Publication Recommender, 2023) Serdiuk, Tetiana M.; Buriak, Serhii Yu.; Serdiuk, Svitlana; Gololobova, Oksana O.; Serdiuk, Kseniia; Skalko, Viktor; Voznyak, Oleh M.
    ENG: The paper is devoted to the study of the causes of electromagnetic interference on railways, methods for their determination and combating them. Various approaches to studying the influence of interfering influences in the operating conditions of railway transport are considered. The actual permissible values of the level of interference from various sources currently operating on the railways of Ukraine are given.
  • Thumbnail Image
    Item
    Selection of Optimal Lithium Battery Technology for Backup Power Supply of Automatics Systems in Railway Transport
    (Printing House “Technologija”, Kaunas, Lithuania, 2024) Buriak, Serhii Yu.; Gololobova, Oksana O.; Serdiuk, Tetiana M.; Voznyak, Oleh M.; Yehorov, Oleh I.; Manachyn, Ivan O.; Radzikhovskyi, Kostiantyn
    ENG: The article presents the results of the research into batteries based on lithium technology. An analysis of all the most widely represented lithium battery technologies was carried out with an assessment of their main parameters. The research was aimed at studying the performance characteristics of the six most common technologies for the production of chemical power sources using lithium, which are currently the most developed and are manufactured on a mass production scale. A comparative analysis showed that the features of each of them should be taken into account in order to optimize the choice of parameters for batteries with different technologies when solving various industrial and household problems, since this approach will make it possible to further use their differences with the greatest efficiency. The most suitable areas for practical application of each type of lithium battery are given, taking into account the individual characteristics of their performance. Also, from a practical point of view of highly efficient use of electrical energy storage devices, as a constant consumer of especially large volumes of energy carriers, the transport industry is considered, which has a great interest in improving technologies in order to improve the quality of equipment, increase the safety of the transportation process and the economic efficiency of the type of activity being carried out. This analysis was carried out using the example of their use in backup power supply systems for railway automatics devices. The advantages of replacing backup power sources based on the traditional method of storing electrical energy using lead-acid batteries with batteries made using lithium technology are shown. At the same time, to determine the appropriate technology, the specifics of the application conditions were first taken into account, since this type of energy source belongs to the category of guaranteed energy supply. The research results obtained allow us to compare lithium batteries to identify selection criteria for specific tasks based on their performance characteristics.