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UPB Scientific Bulletin, Series C: Electrical Engineering and computer science 2024年第2期86卷 61-72页

作者： Dorobăț, Ilie Cristian Posea, Vlad Boncea, Radu Dept. of Computer Science National University of Science and Technology POLITEHNICA Bucharest Romania National Institute for Research and Development in Informatics-ICI Bucharest Romania

The paper introduces the Cultural Leaf Semantic Portal whose aim is to provide a consolidated user-friendly solution for exploring the 36,132 Romanian artifacts and the 1,086 cultural entities that house them. Using the eCHO framework, the data collected from official sources are subjected to a transformation process through which they are sanitized, temporal expressions are normalized, thus reducing the number of forms in which the centuries and millennia are expressed from 1,733 to only 67, and then they are transformed into semantic structures. Finally, the resulting data is accessible via both a SPARQL endpoint and a semantic portal. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： Semantic Web

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Modeling the Vibrations of an Annular Membrane with a Nonsteady General Boundary Condition

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Russian Engineering research 2025年第1期45卷 92-96页

作者： Kostikov, Yu. A. Romanenkov, A.M. Moscow Aviation Institute Moscow Russia Federal Research Center "Computer Science and Control " Russian Academy of Sciences Moscow Russia

Abstract: The initial boundary value problem regarding vibrations of an annular membrane is considered. Nonsteady boundary conditions are specified, and there is no distributed load. This is a nonclassical formulation, since rigid attachment conditions at the edges are usually specified. By appropriate replacement of the function to be determined, the initial problem may be reduced to an inhomogeneous problem with trivial boundary conditions of general form. Application of the standard Fourier method then allows us to express the solution as a functional series based on linear combinations of Bessel functions of the first and second kinds. © Allerton Press, Inc. 2025.

关键词： Boundary value problems

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Solution of a One-Dimensional Parabolic Problem with a Nonlocal Boundary Condition

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Russian Engineering research 2025年第1期45卷 101-105页

作者： Danilina, I.A. Kostikov, Yu. A. Romanenkov, A.M. Moscow Aviation Institute Moscow Russia Federal Research Center "Computer Science and Control " Russian Academy of Sciences Moscow Russia

Abstract: For a one-dimensional boundary problem associated with a linear parabolic equation in the presence of a nonlocal spatial condition, necessary and sufficient conditions for the existence of a solution are established. Structural proof of the existence of a solution is presented. By means of Laguerre polynomials, a solution is explicitly constructed in the form of a functional series. © Allerton Press, Inc. 2025.

关键词： Boundary conditions

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Forced Resonant Damping Vibrations of a Viscoelastic Beam

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Russian Engineering research 2025年第1期45卷 88-91页

作者： Kostikov, Yu. A. Romanenkov, A.M. Skachkov, A.S. Moscow Aviation Institute Moscow Russia Federal Research Center "Computer Science and Control " Russian Academy of Sciences Moscow Russia

Abstract: The initial model boundary value problem regarding vibrations of a viscoelastic beam with damping of Voigt type is considered. A classical formulation of a mixed problem for a fifth-order linear partial differential equation is adopted. The equation includes a term with a mixed derivative: first-order with respect to the time and fourth-order with respect to the spatial variable. On the basis of integral assessment, the energy identity is established, and the presence of damping vibrations is qualitatively demonstrated. By Galerkin projection, an exact solution of this problem is obtained. An algorithm is determined for calculation of the exact solution as a functional series. An explicit resonant term is obtained in general form. © Allerton Press, Inc. 2025.

关键词： Maximum principle

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Motion of an Electrically Conducting Viscous Liquid at a Porous Wall with Liquid Injection

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Russian Engineering research 2025年第1期45卷 106-109页

作者： Vysk, N.D. Gurchenkov, A.A. Romanenkov, A.M. Moscow Aviation Institute Moscow Russia Federal Research Center "Computer Science and Control " Russian Academy of Sciences Moscow Russia

The motion of viscous electrically conducting incompressible liquid is investigated, in circumstances where the liquid rotates initially in a solid mass at constant speed together with a porous boundary wall (plate) until the instantaneous onset of longitudinal vibrations in the wall. The wall is at an arbitrary angle with respect to the axis of rotation. An unsteady flux is induced by the following factors: the longitudinal vibrations;injection (removal) of the liquid perpendicular to the surface of the porous wall;and a constant magnetic field perpendicular to the wall, which is also switched on instantaneously. Exact equations are derived for the velocity field and pressure field of the liquid. The magnetic field induced in the flux of electrically conducting liquid is determined. A hydrodynamic paradox is established on the basis of the results. © Allerton Press, Inc. 2025.

关键词： Magnetic fields

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Modeling the Growth of Household Savings with a Nonlocal Boundary Condition

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Russian Engineering research 2025年第1期45卷 97-100页

作者： Kostikov, Yu. A. Romanenkov, A.M. Parenkina, V.I. Moscow Aviation Institute Moscow Russia Federal Research Center "Computer Science and Control " Russian Academy of Sciences Moscow Russia

Abstract: A stochastic model of the growth of household (family) savings is considered. Conditions are identified such that there exists a solution to the mixed parabolic problem for the distribution density of households in terms of savings. Using Laguerre polynomials, a solution is constructed explicitly in the form of a functional series for an initial boundary value problem with a nonlocal boundary condition. An economic interpretation of this nonlocal condition is outlined. © Allerton Press, Inc. 2025.

关键词： Boundary value problems

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Fault-Tolerant Self-Timed Counters

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Russian Microelectronics 2024年第8期53卷 798-802页

作者： Zatsarinny, A.A. Stepchenkov, Yu. A. Diachenko, Yu. G. Khilko, D.V. Orlov, G.A. Diachenko, D. Yu. Institute of Informatics Problems Federal Research Center "Computer Science and Control" of Russian Academy of Sciences Moscow119333 Russia

Abstract: The article studies the fault-tolerant self-timed (ST) counter design problem. Combinational ST circuits have a higher fault tolerance in comparison with synchronous counterparts due to redundant information coding and mandatory acknowledgment of all initiated circuit cells’ switch completion. Sequential ST circuits, including counters, are more sensitive to soft errors because a soft error can change a state stored by their memory cells. For their fault-tolerant implementation, special circuitry methods, namely DICE and Quatro, are used. They are similar to the data processing channel duplication, but use transistor cross-connection in the circuit cells. This approach significantly reduces the likelihood of a change in the counter bit’s state due to a soft error. The article proposes DICE-type and Quatro-type ST counter cases, compares their features, and resumes recommendations for the fault-tolerant ST counter implementation. © Pleiades Publishing, Ltd. 2024.

关键词： Combinatorial circuits

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Data-driven output regulation control for constrained linear systems

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science China(Information sciences) 2025年第3期68卷 338-353页

作者： Chaoyu XIA Yi DONG Chaoli WANG Shengyuan XU Shanghai Research Institute for Intelligent Autonomous Systems Tongji University College of Electronic and Information Engineering Shanghai Research Institute for Intelligent Autonomous SystemsTongji University Department of Control Science and Engineering School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and Technology Department of Automation Nanjing University of Science and Technology

This study introduces a data-driven approach for state and output feedback control addressing the constrained output regulation problem in unknown linear discrete-time systems. Our method ensures effective tracking performance while satisfying the state and input constraints, even when system matrices are not available. We first establish a sufficient condition necessary for the existence of a solution pair to the regulator equation and propose a data-based approach to obtain the feedforward and feedback control gains for state feedback control using linear programming. Furthermore, we design a refined Luenberger observer to accurately estimate the system state, while keeping the estimation error within a predefined set. By combining output regulation theory, we develop an output feedback control strategy. The stability of the closed-loop system is rigorously proved to be asymptotically stable by further leveraging the concept of λ-contractive sets.

关键词： output regulation constrained system data-driven.

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Data Augmentation for Medical Image Classification Based on Gaussian Laplacian Pyramid Blending With a Similarity Measure

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IEEE Journal of Biomedical and Health Informatics 2025年第6期29卷 3886-3893页

作者： Kumar, Abhinav Sharma, Anshul Singh, Amit Kumar Singh, Sanjay Kumar Saxena, Sonal Department of Computer Science and Engineering Varanasi221005 India National Institute of Technology Patna Department of Computer Science and Engineering Patna800005 India Indian Veterinary Research Institute Division of Veterinary Biotechnology Izatnagar243122 India

Breast cancer is a devastating disease that affects women worldwide, and computer-aided algorithms have shown potential in automating cancer diagnosis. Recently Generative Artificial Intelligence (GenAI) opens new possibilities for addressing the challenges of labeled data scarcity and accurate prediction in critical applications. However, a lack of diversity, as well as unrealistic and unreliable data, have a detrimental impact on performance. Therefore, this study proposes an augmentation scheme to address the scarcity of labeled data and data imbalance in medical datasets. This approach integrates the concepts of the Gaussian-Laplacian pyramid and pyramid blending with similarity measures. In order to maintain the structural properties of images and capture inter-variability of patient images of the same category similarity-metric-based intermixing has been introduced. It helps to maintain the overall quality and integrity of the dataset. Subsequently, deep learning approach with significant modification, that leverages transfer learning through the usage of concatenated pre-trained models is applied to classify breast cancer histopathological images. The effectiveness of the proposal, including the impact of data augmentation, is demonstrated through a detailed analysis of three different medical datasets, showing significant performance improvement over baseline models. The proposal has the potential to contribute to the development of more accurate and reliable approach for breast cancer diagnosis. © 2013 IEEE.

关键词： computer aided diagnosis

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Self-Timed Circuit Emulation on FPGA

Self-Timed Circuit Emulation on FPGA

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2024 International Russian Automation Conference, RusAutoCon 2024

作者： Stepchenkov, Yuri Diachenko, Yuri Tyurin, Sergei Institute of Informatics Problems Frc 'Computer Science and Control' of Ras Moscow Russia National Research Polytechnic University Perm Russia

Field programmable gate arrays (FPGAs) serve as a convenient tool for prototyping and debugging developed digital circuits. Their circuitry is optimized for synchronous unit implementation. computer-aided design systems for digital circuits on FPGAs are also focused on synchronous projects. However, one can also use FPGAs for prototyping self-timed (ST) circuits in the mode of emulating a single-stage representation of some logical and indication cells. The paper analyzes the ST circuit indication cell implementations on the FPGAs and proposes a technique for emulating ST circuits on typical FPGAs. The paper estimates a hardware redundancy of the ST circuit implementations on FPGAs and the results of prototyping an ST unit multiplying two operands with subsequent third operand addition and subtraction without intermediate rounding on the Intel Cyclone and Arria families FPGAs. © 2024 IEEE.

关键词： Field programmable gate arrays (FPGA)

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