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Mainournal ArchiveYear 2025 / № 1

Issue: #1 (118)

DOI 10.18698/1812-3368-2025-1

Mathematics and Mechanics

Calculation of the Asymptotic Covariance Matrix of the Generalized Exponential Autoregressive Model for the Least Absolute Deviations Method
Authors: Goryainov V.B., Masyagin M.M.  

Category: Mathematics and Mechanics | Chapter: Mathematical Simulation, Numerical Methods and Software Packages

  
Keywords: generalized exponential autoregressive model, least absolute deviations method, asymptotic covariance matrix, Taylor series expansion
Numerical Analysis of the Thermal Stress State of a Transverse Isotropic Heat Shield of the Aerospace Vehicle
Authors: Leonov V.V., Zarubin Vl.S.  

Category: Mathematics and Mechanics | Chapter: Mathematical Simulation, Numerical Methods and Software Packages

  
Keywords: сomposites, structurally sensitive material, anisotropic material, transversely isotropic material, thermal stress state, heat shield
Hybrid Characteristic Method based on the Discontinuous Galerkin Method for Solving Gas Dynamics Problems
Authors: Lukin V.V.  

Category: Mathematics and Mechanics | Chapter: Mathematical Simulation, Numerical Methods and Software Packages

  
Keywords: gas dynamics, hyperbolic systems, solution transfer along the characteristics, two-dimensional problems, Galerkin method
Analysis of the Governing Relations of the Endochronic Theory of Plasticity of Orthotropic Materials
Authors: Rakhimov D.R.  

Category: Mathematics and Mechanics | Chapter: Mathematical Simulation, Numerical Methods and Software Packages

  
Keywords: endochronic theory of plasticity, orthotropic materials, composite materials, nonlinearity, relaxation time, deformation curve
Opposition based Russian Ice Hockey Optimization Algorithm for Power Loss Lessening and Stability Amplification
Authors: Kanagasabai L.  

Category: Mathematics and Mechanics | Chapter: Computational Mathematics

  
Keywords: optimal, reactive, transmission loss, Russian ice hockey, chaotic, opposition based

Physics

Numerical Study of Heat Exchange Processes in Channels of Small-Sized Panel-Radiant Heating Systems of Premises
Authors: Grishin Yu.M., Khandramay N.A.  

Category: Physics | Chapter: Thermal Physics and Theoretical Heat Engineering

  
Keywords: natural convection, base-board heating system, vertical channel, heat transfer coefficient, thermal power

Chemistry

Synthesis of Nanosized Zinc Phosphate Stabilized with Biologically Active Substances
Authors: Blinova А.А., Rehman Z.A., Kastarnova E.S., Blinov A.V., Lapin V.A., Pirogov M.A.  

Category: Chemistry | Chapter: Inorganic Chemistry

  
Keywords: zinc phosphate nanoparticles, quantum chemical modeling, essential amino acids, lysine, chemical rigidity, scanning electron microscopy, elemental analysis, X-ray phase analysis
Development of Technology for Obtaining Bayerite from Kaolin Clays from the Chashma-Sang Deposit in the Republic of Tajikistan
Authors: Naimov N.A., Mirsaidov U.M., Mirpochaev Kh.A., Aslonov A.A., Shokarimov S.M.  

Category: Chemistry | Chapter: Inorganic Chemistry

  
Keywords: aluminium sulphate, kaolin clay, Chashma-Sang deposit, sulphatisation, aluminium hydroxide, bayerite, iron hydroxide, burkeite