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Browsing Статті КАТ by Author "Gololobova, Oksana O."
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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, IvanENG: 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.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.Item Features of Electromagnetic Compatibility in Railway Transport(IEEE Publication Recommender, 2023) Serdiuk, Tetiana; 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.