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Optimal design methods of wind-solar hybrid power systems at the stage of investment feasibility study
P. 305–312.
Ермоленко Г. В., Ермоленко Б. В., Фетисова Ю. А.
The article is devoted to development of optimal design mathematical models for power systems using renewable energy sources (RES) on the stage of pre-investment feasibility study. Economic and social practicability of the carbon-free energy sector development in Russia is confirmed by calculated data of renewable energy sources potentials such as fuel, heat and power, resource saving and environmental (in tons of CO and CO2-equivalents) potentials. In order to increase the attractiveness of investing in renewable energy sector the optimal investment designing problem is defined and MILP economic and mathematical model is developed for ecological and economic optimization of decentralized wind-solar hybrid power supply investment projects. The macro structure of the model is considered. The basic mathematical relationships that form the region of feasibility are presented. Designed models can be used to justify the investment in distributed power systems.
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The development of musical abilities, including absolute pitch, musical memory, rhythm sense, and musicality, at a high degree is determined by a hereditary component (up to 68 %). The studies implementing a genome-wide linkage and association approach to musical aptitude have revealed more than 100 genetic loci. This spectrum is comprised of the genes encoding ...
Added: May 29, 2026
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The fourth energy transition requires determining the actual state of affairs in the electric power industry in terms of achieving grid parity in stages. The paper covers the debate in the scientific community on the theory and practice of 237 Конкуренция генераций с учетом социальных и экологических затрат (на примере США) determining the levelized cost ...
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This research discusses the method of dataset collection automatization for microwave filter synthesis by integrating machine learning techniques, thus reducing development time. Utilizing the 3D electromagnetic analysis software package, the study involves simulation and collecting geometric parameters and amplitude-frequency characteristics from three variants of passband highly selective microstrip tworesonator combined filters with stepped impedance resonators. ...
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Photocatalytic water splitting represents a promising approach for solar energy utilization, but its performance is primarily constrained by the sluggish water oxidation reaction, where the hole transfer at the solid/liquid interface plays a significant role. Despite extensive experimental and theoretical efforts, the hole trapping mechanism of TiO2, a widely used photocatalyst, in the aqueous environment ...
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Remote northern regions face unique energy challenges due to geographic isolation, harsh climates, and limited access to centralized power grids. In response to growing environmental and economic pressures, there is a rising interest in hybrid energy systems that integrate renewable and conventional sources. This study investigates sustainable and cost-effective energy supply strategies for off-grid northern ...
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Ekaterina V. Romanova, Evgeny I. Vdovkin, Geography, Environment, Sustainability 2025 Vol. 18 No. 1 P. 117–129
his study highlights the importance of understanding the geographical context of innovation processes in industries driven by tacit knowledge, with German wind energy as its object of investigation. The subject of the research is the spatial organization of innovation processes in the wind energy sector, focusing on the co-location of inventors, production facilities, and installed ...
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In innovation research, geographical proximity between actors plays a special role in identifying knowledge types. It is the types of knowledge that determine the spatial pattern of innovation activity, in particular, the degree and nature of its concentration. The prevailing type of knowledge in the innovation process depends on the stage of development of the ...
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In this paper, Grinin et al. survey general similarities and differences between biological and social macroevolution and phases of Big History. The comparison of biological and social evolution is an important but (regrettably) understudied subject. The authors have endeavored to make a systematic comparison between biological and social evolution at different levels of analysis and ...
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Molostvov V., Advances in Systems Science and Applications 2025 Vol. 25 No. 1 P. 1–11
A two-criteria vector optimization problem – finding Pareto-optimal solutions in linear systems with interval uncertainty of coefficients – is considered. The problem of resource allocation to multiple activities is investigated. The uncertainty-adjusted income is a bilinear function, linear by strategy under fixed uncertainty and by uncertain parameters under fixed strategy. Guaranteed income is a linear ...
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Error correction in the secret key is a mandatory step in quantum key distribution (QKD) protocols. Usually, modern error-correcting codes are used for its implementation. Imperfections of the hardware used in QKD systems lead to bit flipping errors in the channel. Moreover, such systems are characterized by an asymmetric distribution of such errors. Taking into ...
Added: June 3, 2025
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Modern academic literature has focused on technology adaptation and innovation in politics and public administration. At present, there is a large number of studies, the central object of which is such an actively developing phenomenon as public digital services. Despite the diverse range of theoretical approaches, there is no established methodological tradition of modelling the ...
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Cardiovascular diseases associated with high cholesterol (hypercholesterolemia) and low-density lipoproteins (LDL) levels are significant contributors to total mortality in developing and developed countries. Mathematical modeling of LDL metabolism is an important step in the development of drugs for hypercholesterolemia. The aim of this work was to develop and to analyze an integrated mathematical model of ...
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Objectives. A quick cold start of emergency and auxiliary power units based on diesel engines should be possible at any time without
problems and in the shortest possible time. The condition of the engine oil is one of the most important factors influencing the smooth
start-up of power plants. During diesel engine operation, engine oil accumulates soot ...
Added: February 26, 2025
Panos Pardalos, Valery Kalyagin, Mario R. Guarracino, Computational Management Science 2024 Vol. 21 No. 1 Article 35
Big data has become an integral part of modern networks. With the increasing amount of data generated by devices, machines, and applications, networks are constantly being challenged to handle and process this data in a timely and efficient manner. The size, complexity, and variety of data in networks are increasing rapidly, which requires new approaches ...
Added: February 22, 2025
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We propose a mathematical model of the human cardiovascular and respiratory systems. The cardiovascular segment of the model simulates the main heart rate, oscillating blood pressure, peripheral vascular resistance, and nonlinear dynamics of the autonomic control of circulation, namely α- and βsympathetic and parasympathetic control. The respiratory part includes central pattern generator, lungs, and a ...
Added: December 24, 2024
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Mathematical model for theoretical analysis of thermophysical processes of melt drops solidification is examined during their motion inside cooling gas, applying to granulation task. The heat exchange equations during granulation, taking into account convection, heat conductivity in solid phase and Stefan conditions on the boundary of phase transition, are presented. The relationships characterizing correlation of ...
Added: September 26, 2024
Molostvov V., Advances in Systems Science and Applications 2024 Vol. 24 No. 2 P. 103–115
This paper presents the development of computing tools for finding optimal structures of multi-currency deposits in terms of guaranteed risk under uncertain exchange rates. The approach utilizes Savage's minimax regret concept to calculate risk and guaranteed risk functions explicitly, assuming only the limits of possible changes in uncertain parameters are known. The Excel environment implements ...
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This study investigates the influence of digital technologies on conventional business processes and the competitive advantages of Kazakhstani companies in the FMCG sector. Additionally, it explores their contribution to innovativeness and productivity. A systematic literature review was conducted to achieve the research objective. The study results indicate that digital business processes possess unique characteristics, such ...
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