Журнал СФУ. Математика и физика. Journal of SibFU. Mathematics & Physics: Новые ресурсы

Отображаемые элементы 21-40 из 1189

    • Analysis of the Influence of Porosity and Non-Uniform Polarization of Piezoelectric Ceramics on the Efficiency of a Bridge Transducer as Sensor and Actuator 

      Nasedkin, Andrey V.; Nasedkina, Anna A.; Наседкин, Андрей В.; Наседкина, Анна А. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-04)
      Flexible piezoelectric transducers, and the transducers with bridge shaped end-caps in par- ticular, have found wide application as acoustic emitters and energy harvesting devices. In this paper, we investigate the ...

    • On the Velocities of Rayleigh Surface Waves Propagating along Boundaries of Generalized Continua 

      Erofeev, Vladimir I.; Antonov, Artem M.; Malkhanov, Alexey O.; Ерофеев, Владимир И.; Антонов, Артем М.; Мальханов, Алексей О. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-04)
      It is demonstrated that mathematical models of gradient-elastic medium and reduced Cosserat medium, in contrast to the model of classical deformable solid, allow one to describe experimen- tally observed dispersion of ...

    • Influence of Coupling of Thermokinetic and Mechanical Processes on the Composite Synthesis on the Substrate 

      Knyazeva, Anna G.; Kryukova, Olga N.; Князева, Анна Г.; Крюкова, Ольга Н. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-04)
      A coupled mathematical model for the process of a composite synthesis from a powder mixture under laser heating conditions is presented. The model takes into account two phenomena that are neglected in traditional models ...

    • A Classical Aspect of the Dirac Equation in the Context of Conformable Fractional Derivative 

      Ilyas Haouam; Ильяс Хауам (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-04)
      In this article, in the context of the conformable fractional derivative (CFD) and employing Ehrenfest’s theorem, we investigate the classical limit of the Dirac equation within conformable fractional quantum mechanics. ...

    • Elastoplastic Ice Model with Dynamic Damage for Simula- tion of Non-linear Processes During a Low-speed Impact 

      Guseva, Evgeniya K.; Golubev, Vasily I.; Petrov, Igor B.; Epifanov, Viktor P.; Гусева, Евгения К.; Голубев, Василий И.; Петров, Игорь Б.; Епифанов, Виктор П. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-04)
      Estimation of ice deformations during dynamic loading plays a primary role in understanding many processes occurring in the Arctic region. However, the problem of choosing the most suitable model is complicated due to ...

    • Another Proof of Puiseux’s Theorem on Algebraic Functions 

      Buzurnyy, Maxim I.; Lopatin, Ilya A.; Бузурный, Максим И.; Лопатин, Илья А. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-04)
      The paper gives a simpler proof of Puiseau’s theorem on the algebraic function for polyno- mials of a special form

    • Properties of mH-compact Sets in Hereditary m-Spaces 

      Ahmad Al-Omari; Takashi Noiri; Ахмад Аль-Омари; Такаши Ноири (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-04)
      Let (X, m, H) be a hereditary m-space. A subset A of X is said to be H-compact relative to X if for every cover U of A by m-open sets of X, there exists a finite subset U0 of U such that A \ ∪ U0 ∈ H. We obtain several ...

    • Physically Nonlinear Deformation of the Shell Using a Three-field FEM 

      Klochkov, Mikhail Yu.; Nikolaev, Anatoly P.; Pshenichkina, Valeria A.; Vakhnina, Olga V.; Andreev, Aleksandr S.; Klochkov, Yuri V.; Клочков, Михаил Ю.; Николаев, Анатолий П.; Пшеничкина, Валерия А.; Вахнина, Ольга В.; Андреев, Александр С.; Клочков, Юрий В. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-04)
      A method has been developed for implementing an algorithm for determining the stress- strain state (SSS) of a thin shell based on the finite element method (FEM) in a three-field formulation under step loading. A ...

    • Weighted Analogue of LBB Conditions for Solving the Stokes Problem with Model Boundary Conditions in a Domain with Singularity 

      Rukavishnikov, Alexey V.; Рукавишников, Алексей В. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      In the paper the concept of a Rν -generalized solution for the Stokes problem with model boundary conditions in a domain with a corner singularity is defined. Weighted analogue of the Ladyzhenskaya-Babuska-Brezzi conditions ...

    • On some Commutative and Idempotent Finite Groupoids Associated with Subnets of Multilayer Feedforward Neural Networks 

      Litavrin, Andrey V.; Moiseenkova, Tatyana V.; Литаврин, Андрей В.; Моисеенкова, Татьяна В. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      The work studies commutative and idempotent finite groupoids that are associated with subnetworks of multilayer feedforward neural networks (hereinafter simply neural networks). Previously, the concept of a neural network ...

    • On Weakly Contractions Via w-distances 

      Hossein Lakzian; Sedigheh Barootkoob; Nicola Fabiano; Stojan Radenovi´c; Хоссейн Лакзиан; Седигех Барооткуб; Никола Фабиано; Стоян Раденович (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      In this article, we will check whether the known results remain valid if the metric d is replaced by the w-distance p. we show that in some contractive conditions where w-distance p participates instead of metric d, ...

    • On the Aris-Amundson model 

      Kytmanov, Alexander M.; Khodos, Olga V.; Кытманов, Александр М.; Ходос, Ольга В. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      The work is devoted to the study of the real roots of the system of transcendental Aris– Amundson equations. It is shown that the number of real roots is related to the number of real roots of some entire function ...

    • On Spectra and Minimal Polynomials in Finite Semifields 

      Kravtsova, Olga V.; Kuzmin, Ilya K.; Кравцова, Ольга В.; Кузьмин, Илья К. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      We apply the notion of a one-side-ordered minimal polynomial to investigations in finite semifields. A proper finite semifield has non-associative multiplication, that leads to the anomalous properties of its left and ...

    • Existence of Bianchi type Cosmological Phantom universe with Polytropic EoS Parameter in Lyra’s Geometry 

      Suryanarayana Kornu; Rajamahanthi Santhikumar; A. Lakshmana Rao; M. Ramanamurty; P. Sudheer Kumar; K. Seetharam; B. Divya; Сурьянараяна Корну; Раджамаханти Сантикумар; А. Лакшмана Рао; М. Раманамурти; П. Судхир Кумар; К. Ситхарам; Б. Дивья (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      This study explores the Bianchi type-V cosmological model with in the frame work of general relativity, featuring a perfect fluid governed by the polytropic equation in Lyra’s Geometry, expressed p = αρ + kρn, as proposed ...

    • Model of Receiving Channels of an Adaptive Antenna Array to Assess the Impact of Differences in their Characteristics on the Efficiency of Interference Suppression 

      Tyapkin, Valery N.; Dmitriev, Dmitry D.; Shtro, Pavel V.; Luferchik, Pavel V.; Tyapkin, Igor V.; Mikhov, Evgenii D.; Тяпкин, Валерий Н.; Дмитриев, Дмитрий Д.; Штро, Павел В.; Луферчик, Павел В.; Тяпкин, Игорь В.; Михов, Евгений Д. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      The article proposes a mathematical model that allows us to evaluate the impact of differences in the characteristics of reception channels on the quality of noise suppression in radio devices equipped with antenna ...

    • A Novel Protocol for Cell Nanomechanical Assay combined with Rapid Protein Profiling Via AFM-LSM Pattern Colocalization 

      Shmelev, Mikhail E.; Kravchenko, Anna K.; Kumeiko, Vadim V.; Шмелев, Михаил Е.; Кравченко, Анна К.; Кумейко, Вадим В. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      The cell mechanical assay has emerged as a powerful approach to studying cellular behav- ior and protein dynamics. This work presents the novel protocol that combines cell nanomechanical assay with rapid protein expression ...

    • Solving Cauchy Problem for Elasticity Equations in a Plane Dynamic Case 

      Senashov, Sergei I.; Savostyanova, Irina L.; Cherepanova, Olga N.; Сенашов, Сергей И.; Савостьянова, Ирина Л.; Черепанова, Ольга Н. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      Equations of elasticity in a plane dynamic case are considered in this paper. The system of equations is replaced by system of first-order differential equations with the same solution. The solution-equivalent system is ...

    • Characteristic Determinant of a Perturbed Regular Third-order Differential Operator on an Interval 

      Imanbaev, Nurlan S.; Иманбаев, Нурлан С. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      The spectral problem for a third-order operator with an integral perturbation of one of the boundary value conditions are considered in the paper. Conditions are regular and at the same time strongly regular. A feature ...

    • Wave Propagation in a Blocky-layered Medium with Thin Interlayers 

      Efimov, Evgenii A.; Sadovskii, Vladimir M.; Ефимов, Евгений А.; Садовский, Владимир М. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      In this paper, a mathematical model of a blocky-layered medium is studied. Deformable elastic blocks and thin elastic and viscoelastic interlayers are considered. Viscoelasticity is taken into account to describe wave ...

    • Global Solvability of a Kernel Determination Problem in 2D Heat Equation with Memory 

      Durdiev, Durdumurod K.; Nuriddinov, Zhavlon Z.; Дурдиев, Дурдимурод К.; Нуриддинов, Жавлон З. (Journal of Siberian Federal University. Сибирский федеральный университет, 2025-02)
      The inverse problem of determining two dimensional kernel in the integro-differential heat equation is considered in this paper. The kernel depends on the time variable t and space variable x. Assuming that kernel function ...