2304-9782, 2618-8686, 2405-7223
St. Petersburg Polytechnic University Journal. Physics and Mathematics
1
141
2012
1-208
RAR
RUS
7-12
Plyastsov
Semyon
s.plyastsov@gmail.com
Andreeva
Nataliya
Filimonov
Alexey
Peter the Great St. Petersburg Polytechnic University
St. Petersburg, Russian Federation
Low-temperature surface piezoelectricity in strontium titanate ceramics via piezoresponse force microscopy
SrH0[3] ceramics has been investigated by piezoresponse force microscopy at low temperatures. Interesting behavior of ferroelectric properties was observed at temperature of antiferrodistortive phase transition and in the range of temperatures where Muller phase exists.
538.975: 620.22 - 022.53
ceramics
strontium titanate
ferroelectric properties
piezoresponse force microscopy
https://physmath.spbstu.ru/article/2012.14.1/
RAR
RUS
13-16
Maximov
Mikhail
maximov @beam.ioffe.ru
Korenev
Vladimir
korenev@spbau.ru
Savelyev
Artem
artem.savelyev@gmail.com
35379962200
Zhukov
Alexey
Ioffe Physical Technical Institute of the Russian Academy of Sciences
zhukov@beam.ioffe.ru
Russia, 194021, St.Petersburg, Polytechnicheskaya 26
Omelchenko
Alexander
avo-travel@yandex.ru
The model of simultaneous double-state losing in semiconductor QD lasers
We have provided theoretical investigation of the double-state lasing phenomena in InAs/InGaAs self-assembled quantum dot lasers. It is shown that the difference between electron and hole capture rates leads to decrease of output lasing power via QD ground states with increasing current. Taking into account this effect makes it possible to describe observed watt-ampere characteristic and its spectral components both qualitatively and quantitatively.
535.374
double-state lasing
qd lasers
capture rate ratio
inter-level relaxation
ground-state lasing quenching
watt-ampere characteristic
https://physmath.spbstu.ru/article/2012.14.2/
RAR
RUS
17-27
Zelikman
Mark
Peter the Great St. Petersburg Polytechnic University
marzelik@mail.ru
Potseluev
Kirill
The influence of structural factor on the configuration of linear vortex in the 3D-ordered Josephson medium
The systems of difference equations describing two possible current configurations of linear vortex in the 3D ordered Josephson medium based on the conditions of fluxoid quantization in the cells are obtained. The theoretical investigation was realized on the assumption that magnetic field in a cell is not homogeneous.
A method of exact solutions of the systems in case of both configurations of linear vortex for all values of parameters is proposed. The current configurations for linear vortex as well as the values of full energies of both configurations are calculated.
538.945
granulated superconductors
3d-ordered josephson medium
linear vortex
conditions of fluxoid quantization
https://physmath.spbstu.ru/article/2012.14.3/
RAR
RUS
27-36
Gritskevich
Mikhail
gritskevich@ymail.com
Garbaruk
Andrei
agarbaruk@mail.ru
Embedded large eddy simulation with the use of a volume source of turbulent fluctuations
A simple and effective method for computation of turbulent flows within the Embedded LES framework is proposed. The method is implemented in general purpose FLUENT code and its tests show that both attached and separated flows are predicted by the proposed method with a high accuracy.
532.517.4
eles
hybrid rans/les approaches
volume source of turbulent fluctuations
flows separated
https://physmath.spbstu.ru/article/2012.14.4/
RAR
RUS
37-41
Chizhova
Ekaterina
chizhova@sinstr.ru
Calculation of the micro-XRF spectrometer scheme geometry
This paper is devoted to optimization of the micro-XRF geometry scheme using a Monte-Carlo simulation. A brief description of the simulation algorithm is given, calculation of the metrological parameters of the microanalysis shows the optimization efficiency
543.427.4
micro-xrf analysis
scheme geometry
Monte-Carlo simulation
https://physmath.spbstu.ru/article/2012.14.5/
RAR
RUS
41-44
Chizhova
Ekaterina
chizhova@sinstr.ru
Ershov
Nikolai
ershov@sinstr.ru
Calculation of a primary X-ray radiation focusing system in the micro-XRF spectrometer
This work is devoted to optimization of a primary X-ray radiation formation system in the micro-XRF spectrometer. Some theoretical results are given. Calculations made it possible to simulate work of the X-ray tube — polycapillary X-ray lens system and to define parameters of the combination.
543.427.4
polycapillary X-RAY lens
x-ray radiation
microprobe formation
https://physmath.spbstu.ru/article/2012.14.6/
RAR
RUS
45-53
Mironov
Vladimir
vladimir.mironov@ymail.com
An estimation of photon beams parameters in the remote radiation treatment from ionization matrices
A comparative estimation for inaccuracy in profile dependency of photon beams with the energy of 6 MeV has been considered using experimental data from ionization matrices and water phantom with ionization chambers. The regions of practicality for a matrix to test the photon 6 MeV beams quality under the clinical conditions were analyzed. The practical recommendations are given how to carry out the optimizing procedure of dosimetric experimental data during the analysis of therapeutic beam fields.
621.386.85, 66.085.3/.5, 53.088
quality control
radiation therapy
dosimetry
ionization matrices
profile inaccuracy
photon optimization algorithms
https://physmath.spbstu.ru/article/2012.14.7/
RAR
RUS
53-59
Elagin
Vladimir
vladimir.elagin@mail.ru
57197390995
Fotiadi
Alexander
Peter the Great St. Petersburg Polytechnic University
fotiadi@rphf.spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
The determination of ground ultraviolet radiation intensity from COME data
The authors propose a method for correction of the function of absorption of the solar energy stream (the ultraviolet) by ozone on the terrestrial surface and a method for the cloud cover account in the Bird's model used for reconstruction of biologically active ultraviolet radiation in the vicinity of the Earth surface from GOME data.
551.521.07; 535.3
ultraviolet
atmospheric ozone
absorption
gome
Ladenburg
https://physmath.spbstu.ru/article/2012.14.8/
RAR
RUS
60-67
Ushakov
Nikolai
nushakoff@gmail.com
Dorigo
Daniel
d.dorigo@tum.de
Kotov
Oleg
Peter the Great St. Petersburg Polytechnic University
kotov@rphf.spbstu.ru
Liokumovich
Leonid
Peter the Great St. Petersburg Polytechnic University
leonid@spbstu.ru
Technique of digital signal processing of Raman spectra for hydrocarbon lubricants condition diagnostics based on viscosity estimation
In the presented paper an ability of application of Raman spectroscopy and modern signal processing methods for hydrocarbon lubricants quality estimation has been considered. Principal component analysis and wavelet filtering methods were used for complex signal processing. On the basis of experimental spectra an ability of lubrication oils viscosity estimation was demonstrated.
51 9.237.8; 533.9.082.5; 535.375.55
raman spectroscopy principal component analysis
optical spectrum
wavelet filtering
classification
lubricant viscosity
https://physmath.spbstu.ru/article/2012.14.9/
RAR
RUS
68-73
Sominski
Gennadiy
sominski@rphf.spbstu.ru
Arkhipov
Alexander
Peter the Great St. Petersburg Polytechnic University
arkhipov@rphf.spbstu.ru
Dvoretskaya
Nataliya
nat@rphf.spbstu.ru
Kern
Stefan
stefan.kern@kit.edu
Louksha
Oleg
louksha@rphf.spbstu.ru
econstruction of energy spectra of electrons bombarding a solid target
A diagnostical method for reconstruction of electron energy distributions on the basis of bremsstrahlung X-ray spectra from electron beam device collector were tested in simulations and experiments. Applicability of the universal Kramers'es law for reconstruction of electron energy distributions has been numerically estimated for different data acquisition layout conditions.
537.533.9, 621.386.1
electron beam diagnostics
electron energydistribution
x-ray spectrometry
brake radiation
https://physmath.spbstu.ru/article/2012.14.10/
RAR
RUS
74-81
Arkhipov
Alexander
Peter the Great St. Petersburg Polytechnic University
arkhipov@rphf.spbstu.ru
Krel
Stanislav
8svyatoslav8@mail.ru
A simple model of facilitated field-induced electron emission from nanomaterials
A simple numerical model is proposed to describe the complex of phenomena associated with field-induced electron emission from nanostractured materials. The performed simulations demonstrated that many of the features of experimentally observed emission behavior of nanocarbonic films may be explained in the assumption of indirect (two-stage) mechanism of electron transfer to vacuum via intermediary states located by the emitter surface.
537.533.2
autoelectronic emission
field-induced electronic emission
two-stage model
nanocarbon
numeral simulation
https://physmath.spbstu.ru/article/2012.14.11/
RAR
RUS
82-85
Pikul
Olga
pikoul2008@gmail.com
Goncharova
Polina
p_lopatina@mail.ru
Krishtop
Victor
krishtop@festu.khv.ru
Sui
Alexander
fizika@festu.khv.ru
Tolstov
Evgeniy
fizika@festu.khv.ru
The electro-optical control of nonmonochromatic light in a system of two anisotropic crystals
The spectral characteristics of emission transmitted through a system of two anisotropic crystals and three polarizers are given. The emission in the system has been demonstrated to be modulated spectrally (it passed through maxima and minima alternating over a wavelength). Resiting maxima and minima in one crystal somebody can get the effective emission intensity modulation at the output of such an optical system. The electro-optical modulator using a light diode of more than ten nanometers spectral wide as a radiation source had a modulation index beyond 80 percent.
535.5
modulation
electro-optical effect
nonmonochromatic emission
anisotropic crystal
spectral characteristic
https://physmath.spbstu.ru/article/2012.14.12/
RAR
RUS
86-92
Martsenyuk
Mikhail
Fufachev
Mikhail
The formation of medium with artificial optical activity
For the purpose of the formation of local chiral surrounding of a given medium point the orbit method of symmetry group is proposed. Gyration tensor is calculated by Discrete Dipole Approximation (DDA) method. The dependence of gyration tensor on cross dipole-toroidal polarizability tensor is established. Examples of computation of the rotation polarization angle which is considered as a function of local environment structure parameters are given.
537.226.5
artifical gyrotropic media
chirality of medium
gyration tensor
axial toroidal moment
discrete dipole approximation
rotation of polarization plane
computation of rotation polarization angle
https://physmath.spbstu.ru/article/2012.14.13/
RAR
RUS
93-100
Troshev
Anton
antonanton@mail.ru
Krasnov
Dmitry
dkrasnov88@mail.ru
Shourygina
Nataliya
shurygina_n@mail.ru
Scherbachenko
Liya
Donskoy
Victor
victor.donskoy@mail.ru
Karnakov
Vladimir
vak@admin.isu.ru
Electrical phenomena at interfaces in heterogeneous poly mineral systems dispersed
The problems of phenomena taking place in electrically active heterogenious systems dispersed have been considered. The presence of electric forces which cause the self-potential gradients of the internal electric field was revealed at the interface of liquid and solid phases. That field is able to maintain the circulation of currents in such systems. The influence of the double electric layer typical for such systems on forming structure was registered experimentally. The mechanism for electric processing at interfaces of two different polar dielectrics was established.
538.945
portland cement
dielectric polarization
double electric layer
electret
cluster structure
electric potential
structure formation
https://physmath.spbstu.ru/article/2012.14.14/
RAR
RUS
100-107
Sarakuz
Oleg
Goryainov
Georgiy
12784708700
Kapralova
Victoria
Peter the Great St. Petersburg Polytechnic University
kapralova2006@yandex.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Slutsker
Alexander
New segmented cross-linked poly(esterurethansiloxane) elastomers for medical implants
New cross-linked segmented poly(esterurethansiloxane) elastomers have been synthesized for implants of increased strength and durability. It is possible to change the cross-linking density in elastomers by varying of chain segments molecular mass and ratio and chemical structure of a hardening agent.
620.22(075.8): 615.462
elastomers
implants
poly(esterurethanesiloxane)
https://physmath.spbstu.ru/article/2012.14.15/
RAR
RUS
108-112
Petrichenko
Mikhail
Peter the Great St. Petersburg Polytechnic University
fonpetrich@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Serov
Dmitry
dimusum@yandex.ru
Typical limiting problems for the Crocco equation
It is proved that monotone solutions of the limiting problem for the Crocco equation are tantamount to the Cauchy problem with delta-parameter that controls the transport on the left border of an interval of integration.
517.9
ordinary differential equation
limiting problem
asymptotic decomposition
diffeomorphism
https://physmath.spbstu.ru/article/2012.14.16/
RAR
RUS
113-117
Zubov
Vsevolod
ddemidova@mail.ru
Zubov
Sergei
Strecopitova
Maria
ddemidova@mail.ru
Strecopitov
Ivan
The problem of construction of controls over a mechanical system controlled
The paper is devoted to investigation of a guided mechanical goulonom system described by a set of Lagrange's equations of the first kind. The theorems of construction of control over this system are given. They make it possible to construct controls in such a way that the system is asymptotically robust integral manifold.
517.929
control
system controlled
Lagrange's equations
integral manifold
asymptotical stability
https://physmath.spbstu.ru/article/2012.14.17/
RAR
RUS
118-128
Pavlov
Fedor
The calculation of spin-dependent structure function of a deuteron in a formal description of the light cone
The paper views a relativistic deuteron as a system of two intensively interacting nucleons (a dinucleon approach) in a formal description of the light cone. A procedure for consistent calculation of relativistic nuclear corrections to the mean helicity of the proton in the deuteron and the spin-dependent structure g[1]{D}(x,Q{2}) function of the deuteron is shown.
539.125.4, 539.143.42
deuteron
helicity
nucleon
proton
spin
light cone
spin-dependent structure functions
bonn wave function
https://physmath.spbstu.ru/article/2012.14.18/
RAR
RUS
128-137
Kisel
Vasiliy
Ovsiyuk
Elena
e.ovsiyuk@mail.ru
Veko
Olga
vekoolga@mail.ru
Red'kov
Victor
v.redkov@dragon.bas-net.by
Quantum mechanics for a vector particle in the magnetic field on four-dimensional sphere
Quantum-mechanical wave equation for a particle with spin 1 is investigated in presence of external magnetic field in spaces with non-Euclidean geometry with constant positive curvature. The separation of the t, r, cp, z variables is performed; differential equations in the r variable are solved in hypergeometric functions. The study of z-dependence of the wave function has been reduced to a system of three linked ordinary differential 2-nd order equations; till now the system is not solved.
539.12
spherical Riemann space
Duffin - Kemmer equation
magnetic field
hypergeometric function
quantization rule
https://physmath.spbstu.ru/article/2012.14.19/
RAR
RUS
137-145
Ovsiyuk
Elena
e.ovsiyuk@mail.ru
Veko
Olga
vekoolga@mail.ru
Kisel
Vasiliy
Red'kov
Victor
v.redkov@dragon.bas-net.by
New problems in quantum mechanics and the Heun equation
The system of equations for electromagnetic field in the Lobachevsky space is transformed into a single equation which formally coincides with an 1-dimensional Schrodinger equation with an effective potential; on this base, analysis of ideal mirror properties of the medium sumulated by the Lobachevsky geometry is performed. The problem of a spin 1 particle in the Coulomb field is reduced to the Heun equation and to a special class of the Heun functions.
539.12
non-euclidean geometry
quantum mechanics
field theory
Heun equation
https://physmath.spbstu.ru/article/2012.14.20/
RAR
RUS
146-151
Bozhokin
Sergei
bsvjob@mail.ru
Lykov
Sergei
spectrumist@yandex.ru
Continuous wavelet transformation
An annalytical expression of continuous wavelet-transformation for the elementary nonstationary signal which represents work bending around Gauss forms on sine wave function is found. The complex nonstationary signal is represented in the form of superposition of the elementary nonstationary signals. The formula for restoration of a signal on known value of continuous wavelet transformation is resulted, as well as expressions for local density of a spectrum of energy of a signal and spectral integrals are obtained.
519.6
nonstationary signals
continuous wavelet transformation
parent Morlet wavelet
https://physmath.spbstu.ru/article/2012.14.21/
RAR
RUS
152-155
Baranov
Alexey
Ermak
Sergey
Semenov
Vladimir
Peter the Great St. Petersburg Polytechnic University
vladimir_semenov@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Orientation light shift suppression in alkali atoms microwave standards with laser pumping
This work presents analytical studies of the orientation and light frequency shifts in microwave standards with regard to tensor component. It was shown that modulation technique application not only allows eliminating light shift but also provides significant reduction of the frequency errors introduced by external magnetic field orientation fluctuations while pumping alkali atoms with either D, or D[2] line.
539.194
light shift
orientation shift
laser pumping
microwave standard
https://physmath.spbstu.ru/article/2012.14.22/
RAR
RUS
156-160
Baranov
Alexey
Ermak
Sergey
Smolin
Roman
Semenov
Vladimir
Peter the Great St. Petersburg Polytechnic University
vladimir_semenov@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Radio-optical resonance frequency light shift in selective optical pumped rubidium vapor
Theoretical research results of alternative selective optical pumped absorption cell with Rb85 and filter cell containing atoms of Rb87 are presented. And the calculated light frequency shifts for lamp- and laser-pumping are compared.
539.194
light shift
radio-optical resonance
frequency standard
selective optical pumping
https://physmath.spbstu.ru/article/2012.14.23/
RAR
RUS
160-164
Shatsky
Alexander
iskandar2003@mail.ru
Shatskaya
Liudmila
ludmilad@rambler.ru
Diffraction attenuation of the ultrasonic ray of the cylindrical waveguide created by the end face
The calculation of diffraction attenuation of an ultrasonic ray in "a piston radiator - a cylindrical waveguide - the investigated environment" system is carried out. It is shown that spatial dispersion presence in an acoustic waveguide leads to the considerable oscillations of diffraction attenuation unlike a field of a piston radiator and also to origin of areas with the negative value of diffraction attenuation.
534.6: 534.232
ultrasound
excitation of ultrasonic waves
diffraction attenuation of waves
ultrasonic measurements
https://physmath.spbstu.ru/article/2012.14.24/
RAR
RUS
164-177
Kryachko
Alexander
alex_k34.ru@mail.ru
Romanova
Valentina
romanova@mail.ru
Fedorova
Larisa
Lara.940@mail.ru
Diffraction of electromagnetic waves by heterogeneity of the plasma waveguide
The analytical model of the processes accompanying dispersion of electromagnetic waves by heterogeneity of a semi-infinite plasma waveguide has been considered. The electromagnetic field extending along a plasma waveguide was led to a system of the pair equations integrated which was transformed to a boundary problem for functions, analytical in planes of the complex variable. Results of the simulation performed have shown a possibility of the account of the contribution of various types of waves in a resultant absent-minded field. Dispersive characteristics for different types of waves were calculated. The expressions were obtained, allowing to estimate a radiation field in a distant zone on the basis of a stationary phase method.
537.874
plasma waveguide
boundary problem
dispersive equation
stationary phase method
simulation
https://physmath.spbstu.ru/article/2012.14.25/
RAR
RUS
177-183
7006360562
Cherepanov
Andrey
Peter the Great St. Petersburg Polytechnic University
hsapst@spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
The excitation of surface waves by an elementary dipole
The problem of excitation of surface waves by elementary dipole disposed on metallized dielectric slab has been solved. It was shown that dipole radiates surface waves most effectively in the direction along the dipole axis. If electric thickness of dielectric slab is large then the major portion of power is radiated in the form of surface wave.
537.86
electrodynamics
radiation
surface wave
elementary dipole
metallized dielectric
https://physmath.spbstu.ru/article/2012.14.26/
CHR
RUS
184-187
Vasil'eva
Maria
Gavricova
Tatiyana
Ilyin
Vladimir
The Xlllth All-Russian Young-People Conference on Semiconductor Physics and Nanostructures, Semiconductor Opto- and Nanoelectronics
The article reviews the work of 'The XHIth All- Russian Young-People Conference on Semiconductor Physics and Nano-stractures, Semiconductor Opto- and Nanoelectronics' held in Saint-Petersburg, on November 21 — 25, 2011. The titles of students' and post-graduate students' reports diplomaed at the conference are presented.
62(051)
young-people conference
semiconductor physics
nanostructures
optoelectronics
student
post-graduate student
https://physmath.spbstu.ru/article/2012.14.27/
RAR
RUS
188-191
7006360562
Cherepanov
Andrey
Peter the Great St. Petersburg Polytechnic University
hsapst@spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Sochava
Alexander
sochava@radio.rphf.spbstu.ru
The scientific conference of Russian undergraduates specializing in radiophysics
The information on 'The XVth All-Russian Conference of Undergraduates Specializing in Radiophysics' held in Pet-rodvoretz, on December 6 — 7,2011, at educational center of Saint-Petersburg State University has been represented. The students' and post-graduate students' reports diplomaed and awarded by prizes at the conference were outlined. The contents of three reports were briefly described.
62(051)
radiophysics
conference
student
post-graduate student
acoustic wave
radiometer
wired metamaterial
https://physmath.spbstu.ru/article/2012.14.28/