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Language : bengali Language : cherokee Language : german Language : gujarati Language : kabardian Language : russian Language : slavic languages Language : sorbian languages Language : ukrainian Publisher : peter the great st.petersburg polytechnic university

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Academic Journal

Description of polarization-maintaining fibers in analyzing the practical fiber-optic circuits using the Jones formalism

Authors : Temkina Valentina; Liokumovich Leonid; Archelkov Arseniy

Subjects: jones formalism; polarization-maintaining fiber; phase anisotropy

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 3 (2023)

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Academic Journal

Derivation of the Lorentz transformation for determination of space contraction

Authors : Khadka Chandra

Subjects: frame of reference; lorentz transformation; special relativity

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 3 (2023)

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Academic Journal

An antiplane crack emerging from the top of a composite functional gradient wedge

Authors : Tikhomirov Victor

Subjects: functionally graded wedge; interface crack of longitudinal shear; stress intensity factor

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 3 (2023)

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Academic Journal

Optimization of the microstructure of composite materials taking into account the constraints on their properties

Authors : Grishchenko Alexey; Ignatovich Igor; Ovanes Petrosian

Subjects: composite material; homogenization; finite element method

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 3 (2023)

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Academic Journal

Numerical study of the efficiency of modal filter method and observer method for implementation of modal control of vibrations of elastic systems

Authors : Fedotov Aleksandr; Belyaev Alexander; Polyanskiy Vladimir

Subjects: active vibration suppression; modal control; modal filters

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 3 (2023)

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Academic Journal

Formation of Mn4 Si7 films by magnetron sputtering and a wide range of their thermoelectric properties

Authors : Bekpulatov Ilkhom; Loboda Vera; Normuradov Muradulla

Subjects: magnetron sputtering; cleaning of silicon wafer; resistivity

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

The plasmon resonance in the cadmium selenide semiconductor nanocrystals with different doping types

Authors : Ipatov Andrei; Kupriianov Genrikh

Subjects: semiconductor nanocrystal; cadmium selenide; doping

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

Electric and thermoelectric properties of a coordination polymer based on phenazine ligands and silver

Authors : Tretyakov Artem; Kapralova Viktoria; Sapurina Irina

Subjects: polymer composite; nanocomposite; thermal properties

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

Machine learning models to determine unobservable centrality-related parameter values for a wide range of nuclear systems at the energy of 200 GeV

Authors : Lobanov Andrey; Berdnikov Yaroslav; Mitrankov Iurii

Subjects: machine learning; nuclei collisions; regression

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

Phase transitions of caesium nitrate embedded in nanoporous alumina films

Authors : Pavlov Aleksei; Stukova Elena; Baryshnikov Sergey

Subjects: ferroelectric; caesium nitrate; permittivity

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

Machine learning models to find unobservable centrality-related parameter values in collisions of different nuclei in the initial energy range from 40 to 200 GeV

Authors : Lobanov Andrey; Berdnikov Alexander; Mitrankova Maria

Subjects: machine learning; nuclei collisions; initial energy

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

Determination of conditions for obtaining radioactivity of nitrogen-13 isotope for medical use by NX2 dense plasma focus device

Authors : Nassif Alaa; Sahyouni Walid; Zeidan Ola

Subjects: ‎nitrogen-13 isotope; nx2 dense plasma focus device; radioactivity

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

Numerical identification of the chemical reaction rate constant in the ideal displacement model

Authors : Gamzaev Khanlar; Gamzaeva Nusaba

Subjects: chemical reactor of ideal displacement; chemical reaction rate constant; identification problem

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

Synthesis and PL study of Sr3 (VO4 ) 2 :Eu3+ phosphor for W-LED application

Authors : Nagpure Pankaj; Kherde Nivedita; Barde Waman

Subjects: strontium vanadate; co-precipitation; combustion

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

Emission, optical and electrical properties of GaInP/GaP nanofilms

Authors : Shirinov Ganjimurod; Donaev Sardor; Umirzakov Baltokhodja

Subjects: band gap; photoabsorption; energy-band parameter

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

A numerical algorithm for constructing polynomials deviating least from zero with a given weight

Authors : Berdnikov Alexander; Solovyev Konstantin

Subjects: minimax norm; chebyshev polynomial; optimal approximation

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 2 (2023)

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Academic Journal

Binding of caffeine with nicotinamide: A study by means of fluorescence quenching and UV-Vis spectroscopic techniques

Authors : Gebreyohanes Ataklti Abraha; Gemta Abebe Belay

Subjects: fluorescence quenching; binding constant; nicotinamide

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 1 (2023)

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Academic Journal

Dielectric spectroscopy of perfluorosulfonic membranes in proton- and terbium-substituted forms

Authors : Lapatin Nikolay; Castro Arata Rene Alejandro; Karulina Elena

Subjects: perfluorosulfonic membrane; dielectric spectroscopy; proton

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 1 (2023)

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Academic Journal

The ways to form midi-fullerens structure exemplified by С22, С24 and С26 isomers

Authors : Matvienko Aleksandra

Subjects: isomer; periodic system; fusion reaction

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 1 (2023)

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Academic Journal

The two-temperature effect on a semiconducting thermoelastic solid cylinder based on the modified Moore – Gibson – Thompson heat transfer

Authors : Kaur Iqbal; Singh Kulvinder

Subjects: semiconducting media; two temperature effect; modified moore – gibson – thompson heat transfer

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 1 (2023)

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Academic Journal

Radiation of high-energy electrons when channeling in the bent silicon and germanium monocrystals

Authors : Haurylavets Viktar; Korol Andrei; Sushko Gennady

Subjects: ultrarelativistic electron; bent monocrystal; silicon

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 1 (2023)

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Academic Journal

Nanosized vertical nanosheets made of molybdenum disulphide: Electrical and optoelectronic properties

Authors : Alexandrov Sergey; Hattab Yossef

Subjects: chemical vapor deposition; molybdenum disulphide; vertical nanosheet

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 1 (2023)

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Academic Journal

The permittivity – thickness relationship of a PMN (111) single crystal

Authors : Vakulenko Aleksandr; Vakhrushev Sergey; Koroleva Ekaterina

Subjects: ferroelectric; relaxor; lead magnoniobate

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 1 (2023)

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Academic Journal

An electrodynamic model for determining the distribution function of particles by size for blood cells in vivo

Authors : Golovitskii Alexander; Kontsevaya Vera; Kulikov Kirill

Subjects: laser technology; tikhonov's regularization method; t-matrices method

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 1 (2023)

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Academic Journal

Theoretical justification of natural frequency identification in the FDD (Frequency Domain Decomposition) method

Authors : Andrianova Elena; Novitskii Dmitrii; Onischuk Valeriy

Subjects: frequency domain decomposition; damping coefficient; spectral density matrix

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 16, Iss 1 (2023)

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Search Results

Your Filters

Description of polarization-maintaining fibers in analyzing the practical fiber-optic circuits using the Jones formalism

Derivation of the Lorentz transformation for determination of space contraction

An antiplane crack emerging from the top of a composite functional gradient wedge

Optimization of the microstructure of composite materials taking into account the constraints on their properties

Numerical study of the efficiency of modal filter method and observer method for implementation of modal control of vibrations of elastic systems

Formation of Mn4 Si7 films by magnetron sputtering and a wide range of their thermoelectric properties

The plasmon resonance in the cadmium selenide semiconductor nanocrystals with different doping types

Electric and thermoelectric properties of a coordination polymer based on phenazine ligands and silver

Machine learning models to determine unobservable centrality-related parameter values for a wide range of nuclear systems at the energy of 200 GeV

Phase transitions of caesium nitrate embedded in nanoporous alumina films

Machine learning models to find unobservable centrality-related parameter values in collisions of different nuclei in the initial energy range from 40 to 200 GeV

Determination of conditions for obtaining radioactivity of nitrogen-13 isotope for medical use by NX2 dense plasma focus device

Numerical identification of the chemical reaction rate constant in the ideal displacement model

Synthesis and PL study of Sr3 (VO4 ) 2 :Eu3+ phosphor for W-LED application

Emission, optical and electrical properties of GaInP/GaP nanofilms

A numerical algorithm for constructing polynomials deviating least from zero with a given weight

Binding of caffeine with nicotinamide: A study by means of fluorescence quenching and UV-Vis spectroscopic techniques

Dielectric spectroscopy of perfluorosulfonic membranes in proton- and terbium-substituted forms

The ways to form midi-fullerens structure exemplified by С22, С24 and С26 isomers

The two-temperature effect on a semiconducting thermoelastic solid cylinder based on the modified Moore – Gibson – Thompson heat transfer

Radiation of high-energy electrons when channeling in the bent silicon and germanium monocrystals

Nanosized vertical nanosheets made of molybdenum disulphide: Electrical and optoelectronic properties

The permittivity – thickness relationship of a PMN (111) single crystal

An electrodynamic model for determining the distribution function of particles by size for blood cells in vivo

Theoretical justification of natural frequency identification in the FDD (Frequency Domain Decomposition) method

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