Матеріали конференцій
Постійне посилання зібранняhttps://repository.lntu.edu.ua/handle/123456789/286
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Item type:Наукова стаття, Directed Formation of Quality, as a Way of Improving the Durability of Conjugated Parts of Friction Pairs(Springer, Cham, 2020) Tkachuk, Anatolii; Zablotskyi, Valentyn; Kononenko, Andriy; Moroz, Serhii; Prystupa, StanislavIn the article the research of possibilities of directed formation of indicators of quality is given, by selecting technological operations and appointment of corresponding processing regimes. Studied approach directed formation of quality, based on the elements of theories of technological inheritance and interference of quality, which can reduce the role of random factors and their complex combinations in the process of providing regulated quality indicators, which in turn reduces the field of dispersion values performance and improves the quality of processed details. It is noted that for implementation of directed formation it is necessary to determine technological parameters, with the help of changing the values of which, it is possible to control the values of their indicators, which evolve in the process of mechanical processing. This will completely eliminate or reduce the impact of those indicators that worsen the performance properties of parts. It was revealed that the nature of manifestations of technological heredity is influenced by the conditions of implementation and the type of technological operations. It is advisable to apply this approach in the initial machining operations in order to initialize the manifestations of those indicators that improve the performance of the parts in general.Item type:Матеріали конференцій, Application Design for Remote Control of Refrigeration Equipment in an IIoT Environment(2026) Komenda, Taras; Komenda, Nataliia; Yevsiuk, Mykola; Tkachuk, Anatolii; Yakymchuk, NataliaDespite the availability of modern refrigeration systems, many industrial enterprises still lack integrated solutions for automatic monitoring, fault prediction, and energy consumption optimization. This leads to overspending of resources, product losses, and reduced efficiency of production processes, especially in areas with increased requirements for temperature control (food industry, pharmaceuticals, logistics). The implementation of the Industrial Internet of Things helps optimize production processes, increase equipment efficiency, and reduce maintenance costs. The paper considers an industrial refrigeration equipment monitoring system aimed at food, pharmaceutical, and logistics enterprises. The system provides continuous data collection on temperature, energy consumption, and equipment status using sensors and power meters. It supports integration with cloud platforms and peripheral computing for rapid information processing. This allows for the timely detection of deviations, prediction of malfunctions, and minimization of the risk of product loss due to emergencies. The system is considered for use in production complexes with controlled conditions, refrigerated warehouses, and temperature-controlled transport systems. The use of wireless communication technologies and adaptive data storage mechanisms ensures its reliability even in the event of communication failures. The test results confirmed the effectiveness of the proposed solution, which allows enterprises to reduce operating costs, improve resource management, and increase the energy efficiency of production processes. Therefore, the use of industrial Internet technologies for monitoring refrigeration equipment ensures increased energy efficiency, reduced operating costs, and detection of deviations in system operation.Item type:Матеріали конференцій, Basic Stations Work Optimization in Cellular Communication Network(Springer International Publishing, 2021) Tkachuk, Anatolii; Zablotskyi, Valentyn; Zabolotnyi, Oleg; Cagáňová, Dagmar; Yakymchuk, NataliiaThe paper proposes an algorithm that automatically determines the test data amount, depending on the bandwidth of the network channel, so the measurement procedure eliminates operator error. This is especially true during daily measurements, which are carried out on different days of the week. Daily measurements allow to estimate the base station single sector workload, a small area or the entire network as a whole. It is necessary to analyse the network operation and to optimize its problem areas. According to the results of the research, the authors of the paper revealed the hours of maximum and minimum load and load extrema, which is characterized by the fact that the number of subscribers using the cellular network for voice calls or data transmission is the maximum. The regularity of cases when the subscriber terminal is registered in the network but it is impossible to make a voice call or transmit data is revealed. If such a case is isolated, there is no need to change the network or perform optimization. However, if the network overload occurs at certain intervals, it is recommended to optimize the problem area of the network by dynamic power control or installation of an additional transmitter. This method of adjusting base station receivers is suitable for use in 4G and 5G networks.Item type:Наукова стаття, Study of sapropel processing process in rotary disperser-mixer(Jelgava, 2025-05-21) Tsiz, Igor; Khomych, Serhiі; Tsyz, Tetiana; Holii, ValentynOrganic sapropel is a high-quality source of soil humus replenishment and is highly effective when applied to degraded and technogenically contaminated soils. The specific conditions of sapropel deposit formation result in a dispersed structure containing 92-98% water. To utilize sapropel as a solid organic fertilizer, its moisture content must be reduced to 60%, which requires significant energy input. One approach to utilizing organic sapropel in its natural moisture state is treating it with a weak alkaline (or acidic) solution to produce humic fertilizers. To ensure a high-quality reaction between sapropel and alkaline solution, a laboratory-scale rotary disperser-mixer was developed. This design facilitates micro-mixing of naturally moist sapropel with an alkaline solution in an annular channel formed between the rotor and stator. The aim of this study is to determine how the parameters of sapropel treatment in the developed disperser-mixer influence the activation of the humic complex. The study investigated the effects of the alkali solution concentration, the sapropel-to-alkali solution ratio, and the disperser-mixer rotor speed on the treatment process. To assess the effectiveness of the treated sapropel, a laboratory experiment was conducted, growing oil radish with varying fertilizer applications. A four-factor Box-Behnken experimental design was used to develop a mathematical model describing the effect of the treated sapropel on oil radish growth. The results indicate that sapropel processed using the developed rotary disperser mixer, compared to untreated sapropel, led to a 5-20% increase in oil radish plant height.