Anna Kovalenko
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View article: Mathematical Modeling of the Influence of Equilibrium Coefficient Variation on the Steady-State Transport of a Binary Electrolyte in the Cross-Section of a Desalination Channel
Mathematical Modeling of the Influence of Equilibrium Coefficient Variation on the Steady-State Transport of a Binary Electrolyte in the Cross-Section of a Desalination Channel Open
This paper presents the first theoretical investigation of the effect of a variable equilibrium coefficient on the steady-state transport of a binary electrolyte in a desalination channel cross-section of the electrodialyzer. To address th…
View article: Mathematical Modeling of the Influence of Equilibrium Coefficient Variation on the Steady-State Transport of a Binary Electrolyte in the Cross-Section of a Desalination Channel
Mathematical Modeling of the Influence of Equilibrium Coefficient Variation on the Steady-State Transport of a Binary Electrolyte in the Cross-Section of a Desalination Channel Open
This paper theoretically investigates the effect of changes in the equilibrium coefficient on the steady-state transport of a binary electrolyte in a desalination channel cross-section of the electrodialysis apparatus using a mathematical …
View article: Modeling of Electrodialysis Plant at Water Treatment Facility Using Fuzzy Cognitive Map Theory
Modeling of Electrodialysis Plant at Water Treatment Facility Using Fuzzy Cognitive Map Theory Open
Water is a fundamental resource for sustainable demographic, social, and economic development. Today, water scarcity is a major challenge due to population growth, industrial expansion, pollution from human activities, and the limited avai…
View article: Mathematical Modeling of the Influence of Electrical Heterogeneity on the Processes of Salt Ion Transfer in Membrane Systems with Axial Symmetry Taking into Account Electroconvection
Mathematical Modeling of the Influence of Electrical Heterogeneity on the Processes of Salt Ion Transfer in Membrane Systems with Axial Symmetry Taking into Account Electroconvection Open
This article proposes a 3D mathematical model of the influence of electrical heterogeneity of the ion exchange membrane surface on the processes of salt ion transfer in membrane systems with axial symmetry; in particular, we investigate an…
View article: Mathematical Modeling of the Influence of Electrical Heterogeneity on the Processes of Salt Ion Transfer in Membrane Systems with Axial Symmetry Taking into Account Electroconvection
Mathematical Modeling of the Influence of Electrical Heterogeneity on the Processes of Salt Ion Transfer in Membrane Systems with Axial Symmetry Taking into Account Electroconvection Open
The article presents a 3D mathematical modeling of the influence of electrical inhomogeneity of the ion-exchange membrane surface on the processes of salt ion transfer in membrane systems with axial symmetry, in particular, an annular memb…
View article: Numerical Study of Salt Ion Transport in Electromembrane Systems with Ion-Exchange Membranes Having Geometrically Structured Surfaces
Numerical Study of Salt Ion Transport in Electromembrane Systems with Ion-Exchange Membranes Having Geometrically Structured Surfaces Open
This article is devoted to numerically modeling the effect of the geometric modification of the surfaces of ion-exchange membranes in electromembrane systems (EMSs) on the salt ion transport using a 2D mathematical model of the transport p…
View article: Investigation of the Boundary Value Problem for an Extended System of Stationary Nernst–Planck–Poisson Equations in the Diffusion Layer
Investigation of the Boundary Value Problem for an Extended System of Stationary Nernst–Planck–Poisson Equations in the Diffusion Layer Open
This article investigates the boundary value problem for an extended stationary system of Nernst–Planck–Poisson equations, corresponding to a mathematical model of the influence of changes in the equilibrium coefficient on the transport of…
View article: Prediction of Degradation of Concrete Surface Layer Using Neural Networks Applied to Ultrasound Propagation Signals
Prediction of Degradation of Concrete Surface Layer Using Neural Networks Applied to Ultrasound Propagation Signals Open
The aim of this article is the development of a new artificial intelligence (AI) system for the condition assessment of concrete structures. To study the process of concrete degradation, the so-called spatiotemporal waveform profiles were …
View article: Theoretical Study of Salt Ion Transport in EMS with Ion-Exchange Membranes Having Geometrically Structured Surfaces
Theoretical Study of Salt Ion Transport in EMS with Ion-Exchange Membranes Having Geometrically Structured Surfaces Open
The article is devoted to the theoretical analysis of the effect of geometric modification of the surfaces of ion-exchange membranes in electromembrane systems (EMS) on the salt ion transport using a 2D mathematical model of the transport …
View article: Investigation Of The Boundary Value Problem For An Extended System Of Stationary Nernst-planck-poisson Equations In The Diffusion Layer
Investigation Of The Boundary Value Problem For An Extended System Of Stationary Nernst-planck-poisson Equations In The Diffusion Layer Open
The article investigates the boundary value problem for an extended stationary system of Nernst-Planck-Poisson equations, corresponding to a mathematical model of the influence of changes in the equilibrium coefficient on the transport of …
View article: Study of the Current–Voltage Characteristics of Membrane Systems Using Neural Networks
Study of the Current–Voltage Characteristics of Membrane Systems Using Neural Networks Open
This article is dedicated to the construction of neural networks for the prediction of the current–voltage characteristic (CVC). CVC is the most important characteristic of the mass transfer process in electro-membrane systems (EMS). CVC i…
View article: Study of the Current-Voltage Characteristics of Membrane Systems Using Neural Networks
Study of the Current-Voltage Characteristics of Membrane Systems Using Neural Networks Open
The aim of the investigation is the mathematical modeling of processes that take place in electro membrane systems (EMS). The article is devoted to the use of machine learning and artificial intelligence methods for a study of the current-…
View article: Analytical Solutions and Computer Modeling of a Boundary Value Problem for a Nonstationary System of Nernst–Planck–Poisson Equations in a Diffusion Layer
Analytical Solutions and Computer Modeling of a Boundary Value Problem for a Nonstationary System of Nernst–Planck–Poisson Equations in a Diffusion Layer Open
This article proposes various new approximate analytical solutions of the boundary value problem for the non-stationary system of Nernst–Planck–Poisson (NPP) equations in the diffusion layer of an ideally selective ion-exchange membrane at…
View article: Prediction of Degradation of Concrete Surface Layer Using Neural Networks Applied to Ultrasound Propagation Signals
Prediction of Degradation of Concrete Surface Layer Using Neural Networks Applied to Ultrasound Propagation Signals Open
To study the process of concrete degradation, the so-called spatiotemporal waveform profiles were obtained, which are sets of ultrasonic signals acquired by step-by-step surface profiling of the concrete surface. The recorded signals were …
View article: Analytical Solutions and Computer Modeling of a Boundary Value Problem for a Nonstationary System of Nernst-Planck-Poisson Equations in a Diffusion Layer
Analytical Solutions and Computer Modeling of a Boundary Value Problem for a Nonstationary System of Nernst-Planck-Poisson Equations in a Diffusion Layer Open
The article proposes various new approximate analytical solutions of the boundary value prob-lem for the non-stationary system of Nernst-Planck-Poisson (NPP) equations in the diffusion layer of an ideally selective ion-exchange membrane at…
View article: Theoretical Study of the Influence of Electroconvection on the Efficiency of Pulsed Electric Field (PEF) Modes in ED Desalination
Theoretical Study of the Influence of Electroconvection on the Efficiency of Pulsed Electric Field (PEF) Modes in ED Desalination Open
Pulsed electric field (PEF) modes of electrodialysis (ED) are known for their efficiency in mitigating the fouling of ion-exchange membranes. Many authors have also reported the possibility of increasing the mass transfer/desalination rate…
View article: Theoretical Analysis of the Influence of Spacers on Salt Ion Transport in Electromembrane Systems Considering the Main Coupled Effects
Theoretical Analysis of the Influence of Spacers on Salt Ion Transport in Electromembrane Systems Considering the Main Coupled Effects Open
This article considers a theoretical analysis of the influence of the main coupled effects and spacers on the transfer of salt ions in electromembrane systems (EMS) using a 2D mathematical model of the transfer process in a desalting chann…
View article: Investigating the Metabolism of Plants Germinated in Heavy Water, D2O, and H218O-Enriched Media Using High-Resolution Mass Spectrometry
Investigating the Metabolism of Plants Germinated in Heavy Water, D2O, and H218O-Enriched Media Using High-Resolution Mass Spectrometry Open
Mass spectrometry has been an essential technique for the investigation of the metabolic pathways of living organisms since its appearance at the beginning of the 20th century. Due to its capability to resolve isotopically labeled species,…
View article: Mathematical Modeling of Single and Phase Autowaves in a Ferrocolloid
Mathematical Modeling of Single and Phase Autowaves in a Ferrocolloid Open
This paper describes a mathematical model of an autowave process in a cell with a ferrocolloid. The model is a system of differential coupled equations of the second order and differs from the previously presented model in terms of its ori…
View article: Untargeted Lipidomics after D2O Administration Reveals the Turnover Rate of Individual Lipids in Various Organs of Living Organisms
Untargeted Lipidomics after D2O Administration Reveals the Turnover Rate of Individual Lipids in Various Organs of Living Organisms Open
The administration of low doses of D2O to living organisms was used for decades for the investigation of metabolic pathways and for the measurement of the turnover rate for specific compounds. Usually, the investigation of the deuterium up…
View article: Mathematical Modeling of the Influence of the Karman Vortex Street on Mass Transfer in Electromembrane Systems
Mathematical Modeling of the Influence of the Karman Vortex Street on Mass Transfer in Electromembrane Systems Open
In electromembrane systems, the transfer of ions near ion-exchange membranes causes concentration polarization, which significantly complicates mass transfer. Spacers are used to reduce the effect of concentration polarization and increase…
View article: Experimental and Theoretical Study of Forced Synchronization of Self-Oscillations in Liquid Ferrocolloid Membranes
Experimental and Theoretical Study of Forced Synchronization of Self-Oscillations in Liquid Ferrocolloid Membranes Open
A ferrocolloid is a suspension of nanometer-sized ferromagnetic particles (magnetite) in a carrier liquid (kerosene). A unique feature of a ferrocolloid is the fact that layers consisting of densely packed particles are formed near the ele…
View article: Theoretical Analysis of Electroconvection in the Electrodialysis Desalination Channel under the Action of Direct Current
Theoretical Analysis of Electroconvection in the Electrodialysis Desalination Channel under the Action of Direct Current Open
The development of electroconvection in electromembrane systems is a factor that increases the efficiency of the electrolyte solution desalination process. The desalination of the solution, manifested by a change in the distribution of the…
View article: Theoretical Investigation of the Phenomenon of Space Charge Breakdown in Electromembrane Systems
Theoretical Investigation of the Phenomenon of Space Charge Breakdown in Electromembrane Systems Open
At present, it is customary to consider the overlimit operating modes of electromembrane systems to be effective, and electroconvection as the main mechanism of overlimiting transfer. The breakdown of the space charge is a negative, “destr…
View article: Algorithm for Optimization of Inverse Problem Modeling in Fuzzy Cognitive Maps
Algorithm for Optimization of Inverse Problem Modeling in Fuzzy Cognitive Maps Open
Managerial decision-making is a complex process that has several problems. The more heterogeneous the system, the more immeasurable, non-numerical information it contains. To understand the cognitive processes involved, it is important to …
View article: Design and optimization of structured cables systems for automation of production processes of the enterprise
Design and optimization of structured cables systems for automation of production processes of the enterprise Open
The object of research is the process of improving the network architecture of enterprises in order to further optimize production processes. The subject of research is the design and optimization of structured cabling systems to automate …
View article: APPLICATION FOR ADSORPTION MODELS TO DESCRIBE EQUILIBRIA IN THE «CA2+ — VEGETABLE SORBENT» SYSTEM
APPLICATION FOR ADSORPTION MODELS TO DESCRIBE EQUILIBRIA IN THE «CA2+ — VEGETABLE SORBENT» SYSTEM Open
A comparison of the applicability of adsorption models to describe experimental isotherms of adsorption of calcium cations by a natural sorbent and constants and parameters of the equations corresponding to these models are studied and det…
View article: Experimental and Theoretical Study of an Autowave Process in a Magnetic Fluid
Experimental and Theoretical Study of an Autowave Process in a Magnetic Fluid Open
Magnetic fluid (MF) is a colloidal system consisting of ferromagnetic particles (magnetite) with a diameter of ~10 nm suspended in a dispersion medium of a carrier fluid (for example, kerosene). A distinctive feature of magnetic fluid is t…