2304-9782, 2618-8686, 2405-7223
St. Petersburg Polytechnic University Journal. Physics and Mathematics
1
116
2011
RAR
RUS
7-11
Orlenko
Fedor
fadler@mail.ru
Zegrya
Georgiy
zegrya@theory.ioffe.ru
Metal — insulator transition in a nonmagnetic InSb crystal semiconductor in the magnetic field
A Hamiltonian of the exchange interaction in the spin representation is developed for the couples of particles with spins equal to 3/2. The ground antiferromagnetic state is degenerated in respect to the total spin of the acceptor couple. The degeneracy is removed by a strong magnetic field that induces a transition into a magnetic and (at the same time) a conducting state.
539.1(075.8)
hamiltonian of particle system
spin of 3/2
ground state fragmentation
removal of degeneracy
magnetic field
insulator - metal transition
https://physmath.spbstu.ru/article/2011.10.1/
RAR
RUS
11-18
Emelyanov
Victor
resso2003@bk.ru
Kalyuzhniy
Nikolai
nickk@mail.ioffe.ru
Mintairov
Mikhail
mamint@mail.ioffe.ru
Mintairov
Sergei
mintairov@scell.ioffe.ru
Shvarts
Maxim
Shvarts M.Z.
Lantratov
Vladimir
Lantratov V.M.
Optimization of the concentrator three-junctional solar cells
The influence of epilayer structure parameters of tandem GalnP/GalnAs/Ge solar cells on sunlight conversion efficiency has been investigated. The optimal choice of thicknesses and doping levels of emitters of GalnP and GalnAs subcells were shown to allow to improve efficiency of the solar cells up to 4 %.
621.383.8:537.313
solar cell
multijunction
simulation
optical concentrator
chromatic aberration
optimization
epilayer structure
https://physmath.spbstu.ru/article/2011.10.2/
RAR
RUS
18-25
Zelikman
Mark
Peter the Great St. Petersburg Polytechnic University
marzelik@mail.ru
Potseluev
Kirill
The influence of structural factor on the Meissner state in the 3D-ordered Josephson medium
The system of difference equations based on the conditions of fluxoid quantization in the cells is obtained. A method of solutions of the system for the Meissner configuration for all values of parameters is proposed. The current configurations as well as the critical field above which the Meissner configuration does not exist are calculated.
538.945
granulated superconductors
3D-ordered josephson medium
Meissner effect
conditions of fluxoid quantization
https://physmath.spbstu.ru/article/2011.10.3/
RAR
RUS
26-28
Nemov
Sergei
nemov_s@mail.ru
Filippov
Stanislav
stanislav.filippov@gmail.com
Calculation of parameters of tin impurity states in bismuth telluride using the Hall effect data
Basing on experimental temperature dependence of the Hall factor in telluride bismuth crystal doped with tin and iodine, chemical potential of holes and energy of two-electron impurity states of tin have been calculated within framework of two-band model at the temperature range of 77—330 K. Coefficient of temperature drift of tin two-electron level relatively the top of the valence band and value of Hubbard energy were estimated.
621/315.529
Hall effect
bismuth telluride
tin
correlation energy
impurity states
AVBV1
https://physmath.spbstu.ru/article/2011.10.4/
RAR
RUS
29-36
Ganin
Pavel
ganin-pavel@rambler.ru
Schmidt
Alexander
alexander.schmidt@mail.ioffe.ru
Theoretical estimation of the diameter of the droplets formed in a breakup of the largest droplets in the process vessel with stirring
In a liquid-liquid system with mechanical stirring a mechanism of fine droplets fraction formation doesn't have complete theoretical explanation. The paper presents a theoretical estimation of a diameter of the smallest daughter droplets formed in the process vessel in a breakup of largest droplets of polydispersed emulsion.
532.517.4:532.529.5
core of turbulent flow
breakup of droplets
fine fraction
mechanism of formation
https://physmath.spbstu.ru/article/2011.10.5/
RAR
RUS
36-44
Pletnev
Alexander
Peter the Great St. Petersburg Polytechnic University
AAPletnev@yandex.rii
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Talalov
Victor
vtalalov@phmf.spbstu.ru
Mathematical model of heat and mass transfer in the electric furnace molten slag bath
Both mathematical model and economical calculation algorithm for numerical simulation of the heat and mass transfer processes in the molten slag bath of the rectangular electric smelting furnace have been carried out. The high intensive operational conditions of the furnace are investigated.
621.365.23:534.24.001.57
electric smelting furnace
mathematical model
charge
intensification of melting process
https://physmath.spbstu.ru/article/2011.10.6/
RAR
RUS
44-55
Snegirev
Aleksandr
a.snegirev@phmf.spbstu.ru
Sazhin
Sergei
Talalov
Victor
vtalalov@phmf.spbstu.ru
A model and computational algorithm for heat exchange and evaporation of droplets of dispersed liquid
The model of unsteady nonisothermal droplet vaporization of atomized liquid is formulated, taking into account the temperature gradient and liquid recirculation inside the droplet. An efficient and absolutely stable algorithm is developed for further use in numerical simulations of turbulent evaporating sprays.
536.423
droplet evaporation
liquid spray
simulation
liquid dispersed
https://physmath.spbstu.ru/article/2011.10.7/
RAR
RUS
55-60
Krivtsun
Alexander
a.krivtcun@gmail.com
Seteikin
Alexey
An analysis of light propagation process in biological media using graphics processing units technique
A number of issues arising when solving task of numerical simulating of light propagation process has been considered. Numerical results for media with different sets of optical properties are presented and validated against other groups. A new approach towards increasing of calculating performance is presented.
519.245, 535.34, 535, 36
Monte-Carlo method
voxel
optical properties
scattering
photon
statistical weight
https://physmath.spbstu.ru/article/2011.10.8/
RAR
RUS
61-70
Verkhovtsev
Alexei
MBN Research Center at Frankfurt Innovation Center of Biotechnology
verkhovtsev@mbnexplorer.com
Frankfurt am Main, Germany
Polozkov
Roman
polozkov@tuexph.stu.neva.ru
M-5766-2013
57192222016
0000-0002-3584-4583
Ivanov
Vadim
Peter the Great St. Petersburg Polytechnic University
Ivanov@physics.spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Korol
Andrei
MBN Research Center at Frankfurt Innovation Center of Biotechnology
korol@mbnexplorer.com
Frankfurt am Main, Germany
7003387326
0000-0003-1602-6144
Solov'yov
Andrei
MBN Research Center at Frankfurt Innovation Center of Biotechnology
solovyov@mbnresearch.com
3 Altenhöferallee, Frankfurt am Main, 60438, Germany
An investigation of the electronic structure of noble gas endohedral fullerenes
The results of the first self-consistent calculation of the electronic structure of endohedral compounds He@C60, Ne@C60 and Ar@C60 within the Hartree—Fock approximation are presented. The influence of the exchange electron-electron interaction on the hybridization process is studied.
538.915, 539.19, 544.183.2
endohedral fullerene
noble gas
Hartree-Fock approximation
central field approximation
jellium model
orbital
hybridization
https://physmath.spbstu.ru/article/2011.10.9/
RAR
RUS
71-77
Kozlov
Vladimir
Trofimov
Pavel
fizmattrofimov@mail.ru
Akimov
Alexei
akimov_ia@mail.ru
The inverse Hankel transformation for the mixed boundary value problem in the closed interval
The formula of the inverse Hankel transformation for the mixed boundary value problem for requirements of the first and the third sort is gained. Connection with a solution of the mixed problem for requirements of a first labour is considered.
517.444
Hankel transform
Bessel functions
transformation kernel
boundary condition
thermal conductivity
https://physmath.spbstu.ru/article/2011.10.10/
RAR
RUS
78-81
Ivanov
Yuri
Nevskiy
Sergei
nevskiy_sa@physics.sibsiu.ru
Konovalov
Sergey
Gromov
Victor
The influence of electrical potential on changing a dislocation substructure of aluminium at a stress relaxation
Aluminium samples tested for stress relaxation both under normal conditions and under electrical potential have been investigated using transmission diffraction electron microscopy. An essential change of dislocation substructure parameters was revealed.
539.8
aluminium
stress relaxation
dislocation substructure
electrical potential
flexural extinction countour
https://physmath.spbstu.ru/article/2011.10.11/
RAR
RUS
82-87
Elizarova
Marina
melizl@yandex.ru
Mironov
Vladimir
vladimir.mironov@ymail.com
An estimation of inaccuracy in dosimetric data smoothing when installing the remote radiation therapy planning system
Smoothing errors of dosimetric data due to preparation for radiation therapy treatment planning system are considered. Parametrization and numeric estimation of those errors are performed. Practical recommendations concerning smoothing procedure during experimental dosimetric data preparation are given.
34.49.29, 61:539.1.074,53:088
photon beams dosimetry
smoothing algorithms
radiation therapy
remote radiation treatment planning system
error analysis
https://physmath.spbstu.ru/article/2011.10.12/
RAR
RUS
88-93
Charikov
Yuri
y.charikov@yandex.ru
Sklyarova
Elena
sklyarova.mhd@mail.ioffe.ru
The concept of the origin of thermal flares on the Sun
The paper formulates the main items underlying the concept of the origin of thermal flares on the Sun which generate X-rays in the 1-8 A range with a power not above 10~ Вт/м. An analysis of the data amassed for the 0.5.07.2009 flare provides convincing support for the concept proposed.
523.985.3
sun
solar activity
flares
X-RAYS
temporal structure
https://physmath.spbstu.ru/article/2011.10.13/
RAR
RUS
94-98
Nesterenok
Alexander
alex-nlO@yandex.ru
Naidenov
Victor
alex-n10 @yandex.ru
The simulation of propagation of cosmic rays nucleonic component in the Earth's atmosphere
The paper is devoted to statistical simulation of propagation processes of secondary cosmic rays and its interaction with the Earth's atmosphere. We present the simulation results of integral and differential fluxes of cosmic rays nucleons. The comparison between our results and experimental data is done.
524.1
cosmic rays
nucleon1c component
cosmogen1c nuclides
atmospere
earth
https://physmath.spbstu.ru/article/2011.10.14/
RAR
RUS
99-105
Kropotina
Yuliya
Kropotina Yu.A.
Gustov
Maxim
Krasil’shchikov
Alexander
kra@astro.ioffe.ru
Levenfish
Kseniya
ksen@astro.ioffe.ru
Pavlov
Georgiy
pavlov@astro.psu.edu
Multiprocessor 3D-hybrid code for astrophysical plasma modeling
An original multiprocessor 3D divergence-free hybrid code is presented. The code allows for efficient modeling of collisionless processes in plasma on the scale of ion gyroradii. An example of resonant electromagnetic ion-ion instability simulation is provided.
533.9
hybrid modeling
astrophys1cal plasma
divergence-free algorithm
parallel programming
https://physmath.spbstu.ru/article/2011.10.15/
RAR
RUS
106-110
Bykov
Andrey
yk@astro.ioffe.ru
Gladilin
Petr
peter.gladilin@gmail.com
Osipov
Sergey
osm2004@mail.ru
Pavlov
Georgiy
pavlov@astro.psu.edu
A new class of galactic X-ray sources resulting from interaction of stellar wind with a supernova remnant
A model of energetic particle acceleration in the vicinity of expanding supernova shell and of young massive star having powerful stellar wind has been considered. The source was shown to be characterized by unusually hard spectral energy distribution in X- and gamma-ray energy bands.
524.3-17, 524.354
interstellar medium
supernova remnants
particles acceleration at shock waves
stellar wind
https://physmath.spbstu.ru/article/2011.10.16/
RAR
RUS
111-115
0000-0003-4292-0959
Golovitski
Alexander
Peter the Great St. Petersburg Polytechnic University
alexandergolovitski@yahoo.com
The low-current low-pressure glow discharge in the electronegative gases
The physical mechanisms of the existence of two stages of glow discharge in the electronegative gases have been analysed. The electron attachment is shown to be the main mechanism of electron decay at the low-current stage, whereas the diffusion-aided removing — to be that at the high-current stage.
533.9
glow discharge
electronegative gases
electron attachment
plasma modeling
https://physmath.spbstu.ru/article/2011.10.17/
RAR
RUS
116-122
Nguyen
Van
thangspbstu@mail.ru
Forces and moments acting on a rapidly rotating floating bearing with allowance of lubrication hydrodynamics and centrifugal force
The problems of theoretical representation of questions of forces and moments acting on a rapidly rotating floating bearing with allowance of centrifugal force and oil hydrodynamics. The basic results are given with reference to research of short bearing.
621.822.171-251
centrifugal forces
stability
Reynold's equations
moment
short bearing
https://physmath.spbstu.ru/article/2011.10.18/
RAR
RUS
122-129
Zhgutov
Vladimir
abc.kitezh@gmail.com
Mathematical models, the research algorythm and the ribbed shells steadiness analysis at finite bending flexure
The mathematical deformation models and the algorithm of the elastic ribbed shells research accounting geometrical nonlinearity, shifting and bending rigidity of the ribs, and the transverse shifts are proposed. The examples of the solutions for the metal, organic-glass and concrete shells are given. The critical load for the elastic behavior of the material is estimated.
539.3
elastic ribbed shells
geometrical nonlinearity
shifting and bending rigidity of the ribs
transverse shifts
steadiness
critical load
https://physmath.spbstu.ru/article/2011.10.19/
RAR
RUS
130-140
Kesamanly
Fagam
Andrey Dmitrievich Sakharov (on the occasion of his 90th birthday)
https://physmath.spbstu.ru/article/2011.10.20/