Математика и физика. Mathematics & Physics. 2019 12 (6)

 

Ресурсы коллекции

  • Synthesis of the Radio-navigation Signals Parameters Measured by an Exploded Antenna Elements 

    Tyapkin, Valery N.; Dmitriev, Dmitry D.; Kremez, Nikolay S.; Tyapkin, Igor V.; Тяпкин, Валерий Н.; Дмитриев, Дмитрий Д.; Кремез, Николай С.; Тяпкин, Игорь В. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    Modern GNSS navigation equipment has a significant drawback — low noise immunity. To solve this problem, they are based on phased array antennas using adaptive signal processing algorithms. The final effect of such ...

  • Electromechanical Properties and Anisotropy of Acoustic Waves Characteristics in Single Crystals YAl₃(BO₃)₄ 

    Turchin, Pavel P.; Burkov, Sergey I.; Turchin, Vladimir I.; Yurkevich, Sergey V.; Sukhodaev, Pavel O.; Raikova, Irina S.; Турчин, Павел П.; Бурков, Сергей И.; Турчин, Владимир И.; Юркевич, Сергей В.; Суходаев, Павел О.; Райкова, Ирина С. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    Velocity of bulk acoustic waves in base and rotated cuts have been measured by the ultrasonic pulse-echo method and values of CE ijkl and eijk in single crystals YAl3(BO3)4 have been calculated. The value of dijk piezoelectric ...

  • Physical Basis of Quasi-optimal Seismoacoustic Pulse Generating for Geophysical Prospecting in Shallow Water and Transit Zones. Part 1. Theoretical foundations 

    Kudinov, Danil S.; Maykov, Oleg A.; Balandin, Pavel V.; Кудинов, Данил С.; Майков, Олег А.; Баландин, Павел В. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    Despite the development of alternative energy, hydrocarbon raw materials is one of the most important energy resources in the world. The discovery of new deposits today is an urgent task. Long-term prospects for the ...

  • Features of the Metallization Influence on Phase Velocities of Acoustic Waves in Piezoelectric Plates 

    Zolotova, Olga P.; Burkov, Sergey I.; Золотова, Ольга П.; Бурков, Сергей И. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    The paper presents an analysis of the influence of the load represented by two metal layers on the change in the phase velocity of the dispersion modes of the elastic Lamb and SH-waves in "Me/ZnO/Me" and "Me/AlN/Me" ...

  • Postulating the Theory of Experience and Chance 

    Vorobyev, Oleg Yu.; Воробьев, Олег Ю. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    The aim of the paper is the axiomatic justification of the theory of experience and chance, one of the dual halves of which is the Kolmogorov probability theory. The author’s main idea was the natural inclusion of ...

  • On Determinability of a Quotient Divisible Abelian Group of Rank 1 by Its Automorphism Group 

    Vildanov, Vadim K.; Timoshenko, Egor A.; Вильданов, Вадим К.; Тимошенко, Егор А. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    A criterion for determinability of a quotient divisible Abelian group of rank 1 by its automorphism group in the class of quotient divisible Abelian groups of rank 1 is considered in the paper

  • On Domains of Convergence of Multidimensional Lacunary Series 

    Tuychiev, Taxir T.; Туйчиев, Тахир Т. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    This paper is devoted to multidimensional analogues of the Fabry and P˙olya theorems on lacunary series. Domains of convergence of lacunary Hartogs series and series in homogeneous polynomials are studied in this paper. ...

  • Magnetic Behavior and Nexafs-spectroscopy of Bi₂BaNb₂₋₂ₓСo₂ₓO₉₋δ 

    Rychkova, Lubov V.; Nekipelov, Sergey V.; Makeev, Boris A.; Belyy, Vladimir A.; Beznosikov, Dmitriy S.; Zhuk, Nadezhda A.; Рычкова, Любовь В.; Некипелов, Сергей В.; Макеев, Борис А.; Белый, Владимир А.; Безносиков, Дмитрий С.; Жук, Надежда А. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    The samples of solid solutions of Bi₂BaNb₂₋₂ₓСo₂ₓO₉₋δ composition at x 0:04 were synthesized by the solid-phase method. The electron state and the nature of the exchange interactions of cobalt atoms in the samples ...

  • Fictitious Domain Method for Equilibrium Problems of the Kirchhoff-Love Plates with Nonpenetration Conditions for Known Configurations of Plate Edges 

    Lazarev, Nyurgun P.; Everstov, Vladimir V.; Romanova, Natalya A.; Лазарев, Нюргун П.; Эверстов, Владимир В.; Романова, Наталья А. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    New models are investigated in this paper, that describe equilibrium states of plates with Signorini type nonpenetration conditions. In these models, it is assumed that under appropriate loading, plates have special ...

  • Positive Fixed Points of Cubic Operators on R² and Gibbs Measures 

    Eshkabilov, Yusup Kh.; Nodirov, Shohruh D.; Эшкабилов, Юсуп Х.; Нодиров, Шохрух Д. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    One model with nearest neighbour interactions of spins with values from the set [0; 1] on the Cayley tree of order three is considered in the paper. Translation-invariant Gibbs measures for the model are studied. Results ...

  • Influence of the Thermophysical Properties of a Liquid Coolant on Characteristics of the 3D Flows with Phase Transition 

    Bekezhanova, Victoria B.; Goncharova, Olga N.; Бекежанова, Виктория Б.; Гончарова, Ольга Н. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    Regimes of the joint flows of the evaporating liquid and gas – vapor mixture induced by the action of a longitudinal temperature gradient in a three-dimensional channel of a rectangular cross-section in the terrestrial ...

  • Elementary nets (carpets) over a discrete valuation ring 

    Koibaev, Vladimir A.; Койбаев, Владимир А. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    Elementary net (carpet) σ = ( σij) is called closed (admissible) if the elementary net (carpet) group E(σ ) does not contain a new elementary transvections. The work is related to the question of V. M. Levchuk 15.46 ...

  • On Analytical Complexity of Antiderivatives 

    Stepanova, Maria A.; Степанова, Мария А. (Сибирский федеральный университет. Siberian Federal University, 2019-12)
    It is shown that the class of all functions of two variables of finite analytical complexity is not closed under integration. It also follows that the class of all functions of finite analytical complexity in the case of ...