Mathematics: Недавние поступления
Отображаемые элементы 121-140 из 236
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Methods of Fuzzy Multi-Criteria Decision Making for Controlling the Operating Modes of the Stabilization Column of the Primary Oil-Refining Unit
(Mathematics, 2023)Many technological systems are characterized by fuzzy initial information, necessary for the development of their models, optimization and control of operating modes. Therefore, the purpose of this study is to formulate decision making problems for optimizing and controlling operating modes of such systems in a fuzzy environment and to develop methods for solving them. ...2024-12-18 -
Methods for secure cloud processing of big data
(Indonesian Journal of Electrical Engineering and Computer Science, 2021)We study new methods of secure cloud processing of big data when solving applied computationally-complex problems with secret parameters. This is one of the topical issues of secure client-server communication. As part of our research work, we model the client-server interactions: we give specific definitions of such concepts as “solvable by the protocol”, “secure protocol”, ...2024-12-18 -
Methodology for International Transport Corridor Macro-Modeling Using Petri Nets at the Early Stages of Corridor Development with Limited Input Data
(Modelling, 2024)International transport corridors (ITCs) are intricate logistical networks essential for global trade flows. The effective modeling of these corridors provides invaluable insights into optimizing the transport system. However, existing approaches have significant limitations in dynamically representing the complexities and uncertainties inherent in ITC operations and at the ...2024-12-18 -
Metal-Supported Solid Oxide Fuel Cells: A Review of Recent Developments and Problems
(Energies, 2023)The design of metal-supported solid oxide fuel cells (MS-SOFCs) has again aroused interest in recent years due to their low cost of materials, strength, and resistance to thermal cycling, as well as the advantages of manufacturability. MS-SOFCs are promising electrochemical devices for hydrogen energy. Compared to SOFCs, where ceramic electrodes or electrolytes are used as a ...2024-12-18 -
Maximal Regularity Estimates and the Solvability of Nonlinear Differential Equations
(Mathematics, 2020)We study a type of third-order linear differential equations with variable and unbounded coefficients, which are defined in an infinite interval. We also consider a non-linear generalization with coefficients that depends on an unknown function. We establish sufficient conditions for the correctness of this linear equation and the maximal regularity estimate for their solution. ...2024-12-18 -
Mathematical Models for Oil Production Optimization in Fuzzy Environments: Well Stock Forecasting and Regulation
(Mathematical Modelling of Engineering Problems, 2024)The relevance of this study is the importance of investigating mathematical models and systems to optimize oil production in forecasting and regulating well stock in fuzzy environments. The purpose was to assess the practical application of Markov chain models and fuzzy set theory to optimize oil production. This study specifically analyzed operating and idle well stocks ...2024-12-18 -
MATHEMATICAL MODELLING OF THE PROCESS OF NATURAL GAS TRANSPORTATION VIA PIPE NETWORKS USING CROSSING-BRANCH METHOD
(JMMCS, 2024)This research is among the most relevant research on the problems of natural gas transportation via pipe networks. The increased demand for natural gas in Kazakhstan is associated with a greater level of environmental friendliness; as a result, many power-generating stations use natural gas as their main source of energy. Modernization of existing thermal power plants is ...2024-12-18 -
LUMINESCENCE EFFICIENCY OF CERIUM-DOPED YTTRIUM ALUMINUM GARNET CERAMICS FORMED BY RADIATION ASSISTED SYNTHESIS
(Eastern-European Journal of Enterprise Technologies, 2021)The variety of applications of yttriumaluminum garnet (YAG)-based luminescent materials and the morphology necessary for these purposes required the development of many technologies for their synthesis. All synthesis technologies used are complex. The structural phase of yttrium-aluminum garnet is formed with any technology, at temperatures exceeding 1.500 °C. The ...2024-12-18 -
Late Time Attractors of Some Varying Chaplygin Gas Cosmological Models
(Symmetry, 2021)The goal of this paper is to study new cosmological models where the dark energy is a varying Chaplygin gas. This specific dark energy model with non-linear EoS had been often discussed in modern cosmology. Contrary to previous studies, we consider new forms of nonlinear non-gravitational interaction between dark matter and assumed dark energy models. We applied the phase space ...2024-12-18 -
Kinetic Axion f (R) Gravity Phase Space
(Symmetry, 2023)Oikonomou, V.K.; Fronimos, F.P.; Razina, O.; Tsyba, P. Kinetic Axion f(R) Gravity Phase Space. Symmetry 2023, 15, 1897. https://doi.org/10.3390/ sym151018972024-12-18 -
Kernel oper ernel operators and their boundedness fr ors and their boundedness from weighted Sobole om weighted Sobolev space to weighted Lebesgue space
(Turkish Journal of Mathematics, 2019)In this paper, for a wide class of integral operators, we consider the problem of their boundedness from a weighted Sobolev space to a weighted Lebesgue space. The crucial step in the proof of the main result is to use the equivalence of the basic inequality and certain Hardy-type inequality, so we first state and prove this equivalence.2024-12-18 -
ON GENERALIZED SINGULAR NUMBER OF POSITIVE MATRIX OF τ MEASURABLE OPERATORS
(Journal of Mathematical Inequalities, 2023)2024-12-18 -
INTEGRAL OPERATORS WITH TWO VARIABLE INTEGRATION LIMITS ON THE CONE OF MONOTONE FUNCTIONS
(Journal of Mathematical Inequalities, 2019)2024-12-18 -
A NEW GENERALIZATION OF BOAS THEOREM FOR SOME LORENTZ SPACES Λq(ω)
(Journal of Mathematical Inequalities, 2018)2024-12-18 -
Iterated discrete Hardy-type inequalities with three weights for a class of matrix operators
(Bulletin of the Karaganda University. Mathematics Series, 2023)2024-12-18 -
INTERPRETATION OF LABORATORY RESULTS THROUGH COMPREHENSIVE AUTOMATION OF MEDICAL LABORATORY USING OPENAI
(Eastern-European Journal of Enterprise Technologies, 2023)In modern medicine, laboratory tests play an important role in the diagnosis, treatment and monitoring of patients. However, the volume and complexity of the data obtained can create challenges for interpreting the results. In this paper, we present a study on the application of integrated automation of a medical laboratory using OpenAI for a more accurate and ...2024-12-18 -
INTEGRABLE TOLKYNAY EQUATIONS AND RELATED YAJIMA-OIKAWA TYPE EQUATIONS
(Ufa Mathematical Journal, 2023)We consider some nonlinear models describing resonance interactions of long waves and short-waves (shortly, the LS waves models). Such LS models were derived and proposed due to various motivations, which mainly come from the different branches of modern physics, especially, from the fluid and plasma physics. In this paper, we study some of integrable LS models, namely, the ...2024-12-18 -
Integrable Kuralay Equations: Geometry, Solutions and Generalizations
(Symmetry, 2022)In this paper, we study the Kuralay equations, namely the Kuralay-I equation (K-IE) and the Kuralay-II equation (K-IIE). The integrable motion of space curves induced by these equations is investigated. The gauge equivalence between these two equations is established. With the help of the Hirota bilinear method, the simplest soliton solutions are also presented. The nonlocal ...2024-12-18 -
Information system for monitoring of urban air pollution by heavy metals
(Indonesian Journal of Electrical Engineering and Computer Science, 2021)The authors of the article formulated the information monitoring system of Almaty city (The Republic of Kazakhstan). One of the urgent problems of the modern world is the ecological safety of the urban environment. The wellknown unfavorable natural and anthropogenic factors of the Almaty city include the following: geographical and climatic features of the area, the lack ...2024-12-18