2304-9782, 2618-8686, 2405-7223
St. Petersburg Polytechnic University Journal. Physics and Mathematics
3
83
2009
1-119
RAR
RUS
7-10
Kuzmenko
Vladimir
Amur state university
evanina@yandex.ru
Ignatyevskoye Highway, 21, Blagoveshchensk, 675027
Vanina
Elena
evanina@yandex.ru
The simulation of radiation induced phase transition in alumina ceramics
The simulation model of substance flow on the basis of the theory of cellular automatic devices is described. The model for radiation induced phase transition in alumina ceramics is considered.
538.911
alumina ceramics
celluar automatons
simulation
neutron fluence
https://physmath.spbstu.ru/article/2009.4.1/
RAR
RUS
11-16
Ustinov
Alexander
Peter the Great St. Petersburg Polytechnic University
ustinov@physics.spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Petrov
Vladimir
Peter the Great St. Petersburg Polytechnic University
petrov@physics.spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Local magnetic properties of metal surfaces obtained by spin-polarized Auger electron spectroscopy
The local magnetic properties of Fe3O4(110)-Bi h FeNi3(110)-Au surfaces were studied by spin polarized Auger electron spectroscopy (SPAES). The problems of magnetic moments of bivalent and trivalent ions of iron on the surface of Fe304 (110) crystal are discussed.
538.9
spin
magnetism
auger spectroscopy
spintronics
polarization
https://physmath.spbstu.ru/article/2009.4.2/
RAR
RUS
17-23
Ganin
Pavel
ganin-pavel@rambler.ru
Probability of gas bubbles breakup in a single test in an appratus with stirring and aeration
The theoretical estimation of probability of gas bubbles breakup in a core of a turbulent flow of liquid in a single test is offered. The estimation is obtained for homogeneous and isotropic turbulence conditions and for an apparatus with mechanical stirring where distribution of energy dissipation rate is essentially heterogeneous.
532.517.4
core of turbulent liquid flow
gaz bubbles
breakup
probability
single test
https://physmath.spbstu.ru/article/2009.4.3/
RAR
RUS
24-30
Podlivayev
Alexey
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russia, 115409, Moscow, Kashirskoe shosse 31
Katin
Konstantin
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russia, 115409, Moscow, Kashirskoe shosse 31
Simulation of unharmonic processes and decay of small atomic clusters at low temperatures
A new modification of Metropolis algorithm, which allows exploring thermodynamic species of seldom thermal fluctuations of small atomic clusters, has been proposed. Based on this algorithm, a new hybrid molecular dynamics with Monte-Carlo method was combined. It allows to simulate thermal decay of small atomic clusters at low temperatures, where conventional molecular dynamics method is unavailable.
538.911
fullerene
molecular dynamics
Monte–Carlo method
activation energy
frequency factor
https://physmath.spbstu.ru/article/2009.4.4/
RAR
RUS
30-34
Lyashin
Andrey
Trajectory construction for mobile robot motion based on analysis of geodesics on a surface of revolution
The problem of mobile robot path planning to avoid an obstacle, which is modeled by a surface of revolution, is considered. The approach is based on geodesies analysis on this smooth surface. The problem can be treated as a base task for the algorithm of smooth trajectory motion control of the mobile robot in the environment with the obstacles approximated by smooth surfaces with elliptic horizontal sections.
51-73; 519.688
3D path planning
obstacle avoiding trajectory
geodesics
surface of revolution
https://physmath.spbstu.ru/article/2009.4.5/
RAR
RUS
35-40
0000-0003-0309-5917
Berdnikov
Yaroslav
Peter the Great St. Petersburg Polytechnic University
berdnikov@spbstu.ru
Golovin
Alexey
Spirin
Denis
ssdenis@mail.ru
Application of the clustering algorithm to elements identification in tomography
Fuzzy clustering algorithm has been suggested to be introduced in dual energy method being used in X-ray tomography. Shown that this way allows to improve accuracy of element structure identification.
539.1.06; 51-72
clustering algorithm
dual energy method
tomography
https://physmath.spbstu.ru/article/2009.4.6/
RAR
RUS
41-56
Ipatov
Andrey
Peter the Great St. Petersburg Polytechnic University
andrei_ipatov@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Relaxation of collective excitations in metallic clusters
A theoretical study of relaxation processes of collective excitations in metallic clusters is presented. The lifetimes of the plasmon excited states are calculated within the theoretical model based on separation of center of mass motion and internal excitations. The relaxation lifetimes corresponding to surface and volume phonon modes are calculated for sodium clusters of different size.
539.19/196.5
cluster
plasmon
excited state
relaxation
line width
electron-phonon interaction
https://physmath.spbstu.ru/article/2009.4.7/
RAR
RUS
56-62
Shpakovsky
Alexey
Saint Petersburg Electrotechnical University LETI
Russia, 197376, St.Petersburg, Professor Popov street, 5
Glinsky
Gennady
Saint Petersburg Electrotechnical University LETI
Russia, 197376, St.Petersburg, Professor Popov street, 5
Lattice node representation in quantum dots theory
A new quantum dot structures spectra calculation method has been proposed. Energy states of electrons in InAs/GaAs quantum dots were calculated.
621.315.592, 538.915
lattice node representation
quantum dots
simulation
https://physmath.spbstu.ru/article/2009.4.8/
RAR
RUS
62-66
Gubanov
Alexander
Saint Petersburg Electrotechnical University LETI
Russia, 197376, St.Petersburg, Professor Popov street, 5
Glinsky
Gennady
Saint Petersburg Electrotechnical University LETI
Russia, 197376, St.Petersburg, Professor Popov street, 5
Small hydrogen-like centers and excitons in structures with single quantum wells
A new variational method of calculation of donor and exciton spectra in structures with quantum wells is proposed. The first states were calculated in structures with GaAs/AlGaAs quantum wells.
621.315.592, 538.915
shallow hydrogen–like impurities
excitons
quantum wells
simulation
https://physmath.spbstu.ru/article/2009.4.9/
RAR
RUS
67-72
Voronina
Ellina
Kuban State Technological University
Russia, 350072, Krasnodar, Moskovskaya st., 2
7006335646
Privalov
Vadim
Peter the Great St. Petersburg Polytechnic University
kafedra@physics.spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Shemanin
Valery
Kuban State Technological University
vshemaniii@iibkstu.org.ru
Russia, 350072, Krasnodar, Moskovskaya st., 2
Iodine molecules sensing by fluorescent lidar from outer space
The fluorescent lidar equation computer simulation has been fulfilled and the iodine molecules lidar sensing from the outer space potential possibilitiy estimations have been made for the near–Earth atmospheric layer from orbit height up to 600 km and molecules concentration level about 1010 cm-3.
504.064.3+621.373.826
lidar
laser radiation
fluorescence
iodine molecule
atmosphere
https://physmath.spbstu.ru/article/2009.4.10/
RAR
RUS
73-82
Alekseenko
Sergei
sn-alekseenko@yandex.ru
Shemyakina
Tatiana
sh_tat@mail.ru
The construction of the extended characteristic system for a special case of Frankl equations of the elliptic type
In an effort to investigate the system of two quasi-linear differential partial equations of the first order the method of additional argument was mainly used; in so doing the extended characteristic system with additional argument was obtained. It has been proved that at the special value of that argument a solution of the extended characteristic system gives the solution of the original one.
517.956
differential partial equations of first order
method of additional argument
extended characteristic system
https://physmath.spbstu.ru/article/2009.4.11/
RAR
RUS
83-88
Kniazkov
Anatoly
akniazkov@mail.ru
The holographic method of the induced absorption measurement of the optical medium
The matrix analysis of the holographic method of the induced absorption measurements in the optical medium for the transmitted and reflected geometry has been done. The analytic expressions for the diffraction effectuality of the gratings system and output beam intensity were obtained.
535.421
matrix analysis
induced absorption
transmitted and reflected geometry
https://physmath.spbstu.ru/article/2009.4.12/
RAR
RUS
88-94
Ostanin
Sergey
Altai State University
ostanin1963@mail.ru
Russia, 656049, Barnaul, Lenina avenue 61
Semyonov
Georgy
Federal State Budgetary Educational Institution of Higherl Educationс
Russia, 196601, Saint-Petersburg, Pushkin, Petersburg, 2, sh.
The correlative search method of hidden periodicities in dynamics of laser generation
The search for the periodical fragments has been carried out using statistic characteristics of the signal under study: excesses of subarrays and variances of subarrays of its autocorrelation functions, variances of subarrays power of its spectra. Models testing is applied to differential equations system of Lorentz-Haken.
53.087/.088
open dynamic system
intermittency mode
excess
autocorrelation function
determined chaos
periodic signal
https://physmath.spbstu.ru/article/2009.4.13/
RAR
RUS
95-99
Meshcheryakov
Yury
Institute of Problems in Mechanical Engineering of Russian Academy of Siences
Russia, 199178, St. Petersburg, V.O., Bol'shoy prospect, 61
Atroshenko
Svetlana
Saint-Petersburg State University
Russia, 199034, St.Petersburg, Universitetskaya embankment, 7/9
Divakov
Alexander
Institute of Problems in Mechanical Engineering of Russian Academy of Siences
Russia, 199178, St. Petersburg, V.O., Bol'shoy prospect, 61
Titovets
Yury
Peter the Great St. Petersburg Polytechnic University
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Naumova
Natalya
Institute of Problems in Mechanical Engineering of Russian Academy of Siences
Russia, 199178, St. Petersburg, V.O., Bol'shoy prospect, 61
Spall stability of ductile high-strength steels in rotation plasticity regime
Three kinds of armor steel were tested under uniaxial strain conditions within impact velocity range from 200 to 500 m/s. It is shown that maximum of spall strength is realized when velocity variation is equal to velocity defect on the compression pulse plateau which corresponds to the so-called Kolmogorovs universal statistical equilibrium regime in turbulence theory.
579.374
strain rate
rotation structure
shock loading
spall strength
https://physmath.spbstu.ru/article/2009.4.14/
RAR
RUS
100-102
Astapov
Ivan
Institute of Materials of Far Eastern Branch of the Russian Academy of Sciences
Russia, 680042, Khabarovsk, Tikhookeanskaya street, 153
Vanina
Elena
evanina@yandex.ru
Filimonov
Alexey
Peter the Great St. Petersburg Polytechnic University
filimonov@rphf.spbstu.ru
St. Petersburg, Russian Federation
Microdistortions of VK8-alloy surface layer after electrospark alloying with titanic-alloy elements
VK8-alloy surface layer was obtained after electro-spark alloying with Ti-alloys. Microdistortions have been investigated by method of crystal imperfections diffuse scattering of X-rays. Masstransport kinetics and alloying time for basic material are reported. Advice is given.
621.9.048.4
electro–spark alloying
alloys
method of crystal imperfections diffuse scattering of X-rays
https://physmath.spbstu.ru/article/2009.4.15/
RAR
RUS
103-107
Ilyichev
Igor
Ioffe Physical Technical Institute of the Russian Academy of Sciences
Russia, 194021, St.Petersburg, Polytechnicheskaya 26
Toguzov
Nikolay
Ioffe Physical Technical Institute of the Russian Academy of Sciences
Russia, 194021, St.Petersburg, Polytechnicheskaya 26
Shamray
Alexander
Ioffe Physical Technical Institute of the Russian Academy of Sciences
Russia, 194021, St.Petersburg, Polytechnicheskaya 26
Optimal configuration of integrated optical thin film polarizer on lithium niobate substrate
Thicknesses of dielectric buffer layer and metal film are key parameters which determine the optical characteristics of integrated optical thin film polarizer. An optimum polarizer configuration is found for single mode channel optical waveguides matched to a standard optical fiber (SMF-28). A suggested polarizer consists of a metal (al) film and a dielectric (Al2O3) buffer layer.
535.318
integrated optics
polarizers
lithium niobate
plasmon polaritons
https://physmath.spbstu.ru/article/2009.4.16/
RAR
RUS
107-110
Golovkina
Maria
Povolzhskiy State University of Telecommunications and Informatics
algol61@mail.ru
Russia, 443010, Samara, L. Tolstogo street, 23
The function of losses in layered waveguide structure with metamaterial slab
The influence of attenuation on features of electromagnetic waves propagation in rectangular two-layered waveguide (which has metamaterial slab with negative refractive index, dielectric slab and thin resistive film) is investigated.
621.372.8
waveguide
metamaterial
attenuation
losses
electromagnetic waves
https://physmath.spbstu.ru/article/2009.4.17/