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The Bulletin of the Adyghe State University, the series “Natural-Mathematical and Technical Sciences” |
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#4 / 2023MathematicsTlyachev V.B., Ushkho D.S.On limit cycles of quadratic differential systems having two focuses**
Sufficient conditions are obtained for the absence of limit cycles in quadratic systems having two and only two simple equilibrium states in the phase plane, if these equilibrium states are focuses. With the help of affine transformations of phase variables, criteria are determined that allow us to distinguish from the set of all quadratic systems a class of systems having two and only two simple equilibrium states. Examples confirming the formulated statements are given.
Technical SciencesBuchatskiy P.Yu., Teploukhov S.V., Onishchenko S.V., Lisov D.N., Vorobeva I.N.Assessment of the impact of the introduction of renewable energy sources on the cost of electricity in the region
The use of various types of renewable energy sources (RES) around the world is becoming more widespread every year, as many countries adhere to energy transformation policies that include many different points, the main of which is to maximize the level of carbon-free energy and transition to cleaner types of energy. For a long time, many people has been skeptical about the use of renewable energy as the main types of energy production due to their high cost in comparison with traditional energy. However, the development of energy conversion technologies has made it possible to increase the efficiency of energy converters and reduce the cost of their production, as a result of which, over the past few years, there has been a decrease in the cost of energy produced using alternative energy sources. It may be noted that in countries that have exhausted their reserves of hydrocarbons resources, or have them in limited quantities, the cost of renewable energy is lower compared to traditional energy. The situation is somewhat differ-ent in countries with vast reserves of hydrocarbon resources, which, in particular, includes Russia. In this regard, a study has been carried out that made it possible to assess the impact of the integration of RES into the general energy system of the region on the process of forming elec-tricity tariffs. The Republic of Adygea was chosen as the region for the study, since this region is energy-deficient and has large generation stations based on the use of alternative energy located on its territory. To conduct an empirical study, data on the amount of electricity tariffs before the commissioning of the stations and after their launch were used, various types of regressions and clustering methods were considered as methods. The results of the study showed that there is a strong relationship between the process of involving RES in the energy system of the region and the formation of prices, as a result of which there is a change in the trend of tariff growth.
Overview and comparison of ways to implement the interface of iOS applications
The main methods of interface layout in mobile applications for the iOS system, selection of criteria for their comparison are considered. A comparative analysis of the existing layout methods was carried out according to the selected criteria. Based on practical experience, a brief description of each discussed method of creating an interface for the iOS application is also given.
Algorithm and convergence analysis of the federated learning model of flight a drone swarm
The purpose of this study is to review and analyze the application of a relatively new and well–proven machine learning methodology for a distributed information collection and processing system – federated model training used to fly a swarm of drones as a group of agents in terms of transferring accumulated data and training an artificial intelligence model. The scheme of federal training for a group of unmanned aerial vehicles (UAV) is described. Special attention is paid to the concept of convergence in machine learning.
Climate change as a factor of regional changes in energy consumption (natural gas, electricity)
The work is devoted to the analysis of climatic data and data of heat and electric power of enterprises on the example of the Labinsky district of the Krasnodar Territory. The article identifies trends in the dynamics of the useful supply of natural gas and electricity to consumers of the Labinsk region, determines the relationship and prospects of energy consumption, taking into ac-count, both in general, with regional climate changes, and in the context of seasons, taking into account local climatic features of the area under consideration. Long-term data, based on the results of the analysis of which conclusions were drawn, were directly collected: on the surface air temperature in the Krasnodar VS FSUE (hereinafter KVS) and at the Labinsk Weather Sta-tion of the North Caucasian UGMS branch of the North Caucasian UGMS FSUE (hereinafter MS Labinsk); on vacation, gas and electricity consumption, private sector consumers and to le-gal entities, in the Municipal Unitary Enterprise of Labinsk “Thermal Networks”, in the Labinsk branch of JSC Gazprom Gas Distribution Krasnodar, in the Labinsk branch of JSC NESK, in the Labinsk branch of PJSC Rosseti Kuban. As a result of the analysis, it was found that climate change leads to ambiguous changes in the dynamics of energy consumption (consumption). With an increase in surface air temperature, there is a steady tendency to save resources in the district’s thermal power industry, at the same time it is questionable for the electric power industry.
Conceptual bases for realization of human-machine interaction
The paper presents an overview of research in the field of organization of human-machine systems, defines a possible scheme for building system intelligence as an instrument for implementing decision-making processes in complex information systems with many different intellectual agents, implying a complex interaction of various types of intelligence depending on the existing level of non-certainty in the system at a specific stage of its functioning.
The methodology of forecasting and probabilistic statistical analysis of environmental risks in alternative energy in the mountainous region
For analyze the possible impact of environmental risks on generator sets using renewable ener-gy sources in mountainous conditions, a methodology for forecasting (using a stochastic matrix) and probabilistic analysis (using the Monte Carlo method) of environmental risks in alternative energy is proposed. An algorithm for the implementation of a methodology for probabilistic analysis of the influence of external factors on a generator set is presented, which allows predicting measures to reduce the influence of negative factors, thereby improving the energy possibilities of improving the quality of life and life safety in remote mountainous regions.
MemoryBuchatskaya V.V., Buchatsky P.Y., Shopin A.V., Teploukhov S.V., Onishchenko S.V.Simankov Vladimir Sergeevich (1947 – 2023)
Emtyl Zaurkan Kamboletovich (1945 – 2023)
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