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    Wyświetlanie 1-31 z 31
    Tytuł:
    Recombination nearby N-n GaSb/GaInAsSb Staggered Lineup Heterojunction
    Autorzy:
    Popov, A. A.
    Imenkov, A. N.
    Kolchanova, N. M.
    Yakovlev, Yu. P.
    Piotrowski, T. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1877143.pdf
    Data publikacji:
    1995-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.20.Nz
    Opis:
    The recombination nearby large band-offset staggered lineup N-GaSb/n-GaInAsSb heterojunction was investigated by means of the electroluminescence and carrier lifetime measurements. It was demonstrated that the nature of recombination, tuning rate as well as relation between radiative and non-radiative recombination strongly depend on the N-n band-offset and that its increase improves the carrier localization on the N-n interface.
    Źródło:
    Acta Physica Polonica A; 1995, 87, 2; 559-562
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-Euclidean geometry and differential equations
    Autorzy:
    Popov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1359528.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    In this paper a geometrical link between partial differential equations (PDE) and special coordinate nets on two-dimensional smooth manifolds with the a priori given curvature is suggested. The notion of G-class (the Gauss class) of differential equations admitting such an interpretation is introduced. The perspective of this approach is the possibility of applying the instruments and methods of non-Euclidean geometry to the investigation of differential equations. The equations generated by the coordinate nets on the Lobachevsky plane $Λ^2$ (the hyperbolic plane) take a particular place in this study. These include sine-Gordon, Korteweg-de Vries, Burgers, Liouville and other equations. They form the so-called $Λ^2$-class (the Lobachevsky class). The theorems on the mutual transformation of solutions of $Λ^2$-class equations are formulated. On the base of the developed approach a transformation allowing one to construct global solutions of Liouville type equations from solutions of the Laplace equation is established. Natural generalizations of the well-known nonlinear PDE from the non-Euclidean geometry point of view are proposed. The possibility of the applications of the discussed formalism in the phase spaces theory is stressed.
    Źródło:
    Banach Center Publications; 1996, 33, 1; 297-308
    0137-6934
    Pojawia się w:
    Banach Center Publications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kontaktnaja prochnost' zubchatykh muft s prodol'no modificirovannymi zub'jami
    Contact strength of gear couplings with longitudinal teeth modification
    Autorzy:
    Popov, A.
    Savenkov, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/76360.pdf
    Data publikacji:
    2011
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2011, 13 A
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some constructive applications of $Λ^{2}$-representations to integration of PDEs
    Autorzy:
    Popov, A.
    Zadadaev, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1207978.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    discrete net
    $Λ^{2}$-representations of PDEs
    Lobachevsky (hyperbolic) geometry
    pseudospherical metric
    Opis:
    Two new applications of $Λ^{2}$-representations of PDEs are presented: 1. Geometric algorithms for numerical integration of PDEs by constructing planimetric discrete nets on the Lobachevsky plane $Λ^{2}$. 2. Employing $Λ^{2}$-representations for the spectral-evolutionary problem for nonlinear PDEs within the inverse scattering problem method.
    Źródło:
    Annales Polonici Mathematici; 2000, 74, 1; 261-274
    0066-2216
    Pojawia się w:
    Annales Polonici Mathematici
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Propagation of pulsed sound signals on a shelf of free tidal sea: effects from coastal eddies and internal waves
    Autorzy:
    Mikryukov, A.
    Popov, O.
    Serebryany, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/331674.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    pulsed sound signal
    Black Sea
    hydroacoustic
    Opis:
    A long term experiment on studying fluctuations of the parameters of pulsed sound signals in a shallow sea was carried out in the region of the northeastern coast of the Black sea in autumn, 2004. the data were collected on a 1.2-km fixed propagation pathat a 2-km distance from the coastline. During the entire experimentation, observations of temperature fluctuations near the receiving point were performed by the using the line temperature sensor. Fluctuations of the shape, energy and propagation time of the pulsed signals were studied. an attempt of their relation to the hydrodynamic processes on the shelf was taken. The change in the shape and the energy levelof the signal was analyzed for the moment of passing the anticyclonic topographic eddy over the coastal zone. It was shown that the fluctuations of the propagation time were sometimes as high as 17.6 ms. An enhanceof the short-period acoustic fluctuations accompanying the internsification of the internal waves was observed.
    Źródło:
    Hydroacoustics; 2008, 11; 279-288
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustical observation of internal waves on the shelf of the Black Sea
    Autorzy:
    Mikryukov, A.
    Popov, O.
    Serebryany, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/332808.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    hydroacoustics
    acoustical observation
    Black Sea
    Opis:
    In October, 2007, the Acoustics Institute performed complex acoustical and oceanological studies on a fixed experimental path in the Black Sea, near the Golubaya Bay. Sound signal with linear frequency modulation were used in the experiment. The processing of the experimental records consisted in computing the envelope of the correlation function of the received and transmitted signals and the time dependence of the correlation maxima. A characteristic change in arrival times of the rays is observed for the period of the income of cold near-bottom waters on the path. The quasi-harmonic variation in the arrival times of the ray groups allows one to correctly define the parameters of short-period internal waves accompanying the bore.
    Źródło:
    Hydroacoustics; 2009, 12; 153-158
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opredelenie parametrov ehlementov stroitelnykh konstrukcijj c uchetom zadannojj verojatnosti ikh nerazrushenija
    Approach of the systems to design of build constructions
    Autorzy:
    Chemodurov, V.
    Popov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/77891.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    building condition
    nonlinear programming
    optimal decision
    design
    structural element
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 1
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combustion Formation of Novel Nanomaterials: Synthesis and Cathodoluminescence of Silicon Carbide Nanowires
    Autorzy:
    Savchyn, V.
    Karbovnyk, I.
    Popov, A.
    Huczko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807601.pdf
    Data publikacji:
    2009-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.Hk
    78.67.Bf
    81.07.Bc
    Opis:
    This paper presents the combustion synthesis and characterization of one-dimensional silicon carbide nanostructures (nanowires of 3C-SiC polytype with zincblend structure) by means of cathodoluminescence technique. Cathodoluminescence spectra of nano-SiC samples and, as a reference, of a commercially available SiC micropowder are compared. It is shown that the emission band at 1.97 eV which is slightly evidenced in the spectrum of the commercial SiC under 10 keV electron beam irradiation becomes the prevailing band in CL of the purified silicon carbide nanowires.
    Źródło:
    Acta Physica Polonica A; 2009, 116, S; S-142-S-145
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiz neuchtennykh raskhodov vody v sisteme vodootvedenija
    An analysis of unaccounted water in the sewerage system
    Autorzy:
    Zajjchenko, L.
    Lesnojj, V.
    Popov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/76820.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    water supply system
    sanitation
    sewage system
    waste water
    service
    cost
    analysis
    Opis:
    The methods of determining the unaccounted water in the sewerage system has been developed. An objective assessment of these costs will assign economically to justify tariffs for water and wastewater services, to carry out targeted work on resource companies on water supply and sanitation.
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Binary Classification of Heart Failures Using k-NN with Various Distance Metrics
    Autorzy:
    Udovychenko, Y.
    Popov, A.
    Chaikovsky, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/226330.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnetocardiography
    current density imaging
    current density distribution map
    k-NN classification
    negative Tpeak
    heart failure diagnostics
    Mahalanobis distance
    Cityblock distance
    Eucleadian distance
    Chebyshev distance
    Opis:
    Magnetocardiography is a sensitive technique of measuring low magnetic fields generated by heart functioning, which is used for diagnostics of large number of cardiovascular diseases. In this paper, k-nearest neighbor (k-NN) technique is used for binary classification of myocardium current density distribution maps (CDDM) from patients with negative T-peak, male and female patients with microvessels (diffuse) abnormalities and sportsmen, which are compared with normal control subjects. Number of neighbors for k-NN classifier was selected to obtain highest classification characteristics. Specificity, accuracy, precision and sensitivity of classification as functions of number of neighbors in k-NN are obtained for classification with several distance measures: Mahalanobis, Cityblock, Eucleadian and Chebyshev. Increase of the accuracy of classification for all groups up to 10% was obtained using Cityblock distance metric in binary k-NN classifier with 19 - 27 neighbors, comparing to other metrics. Obtained results are acceptable for further patient’s state evaluation.
    Źródło:
    International Journal of Electronics and Telecommunications; 2015, 61, 4; 339-344
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reflection from layered dielectric structures with combined regular and random inhomogeneities
    Autorzy:
    Guzev, M.A.
    Popov, G.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/308755.pdf
    Data publikacji:
    2000
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    optical waveguides
    layered structures
    Opis:
    Optical wave reflection from a layered half-space with regular and random inhomogeneities where the regular perturbations correspond to a linear waveguide near the half-space boundary. Random inhomogeneities are simulated in the frame of the white noise model. The problem is solved analytically in a framework of the embedding method which reduces a boundary problem to the problem with initial values considering the field as a function of the half-space boundary coordinate and obtaining then its solution as a steady-state probability density of the reflection coefficient phase. Numerical calculations revealed some features of the field behaviour under the combined influence of regular and random inhomogeneities such as the reflection coefficient phase increasing inhomogeneity from uniform distribution for small regular inhomogeneities toward a strong peak at the phase equal to pi/2 for increasing ones, and some fine effects which are still greater then the calculation accuracy.
    Źródło:
    Journal of Telecommunications and Information Technology; 2000, 1-2; 80-82
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Muon Transfer in Hydrogen Isotopic Mixtures
    Autorzy:
    Czapliński, W.
    Kravtsov, A.
    Mikhailov, A.
    Popov, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968877.pdf
    Data publikacji:
    1998-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    34.60.+z
    Opis:
    Direct and inverse muon transfer between atomic orbits of muonic hydrogen isotopes is considered in the WKB approximation. The corresponding cross sections, calculated as functions of collision energy, are different above the thresholds for the inverse transfer and approach common limits depending on the principal quantum number and hydrogen isotopes. The comparison of results obtained by integration over impact parameter and by summation over angular momentum is also presented.
    Źródło:
    Acta Physica Polonica A; 1998, 93, 4; 617-623
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opredelenie naprjazhenno-deformirovannogo sostojanija tel pri ikh kontaktnom vzaimodejjstvii, kontaktnaja zadacha
    Determination of the tensely-deformed state of bodies at their pin co-operation, pin task
    Autorzy:
    Popov, A.
    Butakov, B.
    Marchenko, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/78174.pdf
    Data publikacji:
    2011
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2011, 13 A
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological protection of vegetable crops as an element of agrophytocenoses ecologization
    Biologiczna ochrona upraw warzywnych jako element ekologizacji agrocenoz
    Autorzy:
    Vaga, I. I.
    Popov, F. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/336744.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    food products
    biopesticides
    biostimulator
    disease resistance
    phytosanitary monitoring
    agrocenosis optimization
    agriculture ecologization
    artykuły spożywcze
    biopestycydy
    biostymulator
    odporność na choroby
    kontrola fitosanitarna
    optymalizacja agrocenozy
    ekologizacja rolnictwa
    Opis:
    In the publication the role of products for biological plant protection against noxious organisms is shown in structure formation and vegetable crops agrophytocenoses stabilization, their quantitative and qualitative composition. It is pointed out that application of biological pesticides with different mechanism of action exerts a positive effect on plant growth and development, facilitates the phytosanitary situation improvement in vegetable crops and decreases the negative influence on the environment.
    Przedstawiono rolę środków do biologicznej ochrony roślin przed szkodnikami w strukturze formowania i stabilizacji agrofitocenoz upraw warzywnych, ich skład ilościowy i jakościowy. Zauważono, że biologiczne pestycydy o różnej zasadzie działania zaprawy użytkowej mają pozytywny wpływ na wzrost i rozwój rośliny, ułatwiają poprawę sytuacji fitosanitarnej w uprawach warzywnych i zmniejszają negatywny wpływ na środowisko.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2017, 62, 4; 191-192
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of Heart Rate Variability Fluctuations by Wavelet Transform
    Autorzy:
    Popov, A.
    Karplyuk, Y.
    Fesechko, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/226306.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heart rate variability
    HRV fluctuations
    HRV wavelet analysis
    time-dependent HRV estimation
    wavelet transform
    Opis:
    Technique for separate estimation of fast and slow fluctuations in the heart rate signal is developed. The orthogonal dyadic wavelet transform is used to separate the slow heart rate changes in approximation part of decomposition and fast changes in detail parts. Experimental results using the recordings from persons practicing Chi meditation demonstrated the applicability of estimation heart rate fluctuations with the proposed approach.
    Źródło:
    International Journal of Electronics and Telecommunications; 2011, 57, 3; 395-400
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Time Domain Model of GPR Antenna Radiation Pattern
    Autorzy:
    Edemsky, F.
    Popov, A.
    Zapunidi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226318.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    subsurface sensing
    ground penetrating radar
    electromagnetic pulse radiation
    ground-air interface
    time-domain Green function
    spatio-temporal radiation pattern
    inverse problem
    deconvolution
    Źródło:
    International Journal of Electronics and Telecommunications; 2011, 57, 3; 407-411
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tribological properties of multilayered vacuum coating
    Autorzy:
    Rogachou, A.
    Popov, A.
    Piliptsov, D.
    Yarmolenko, M.
    Rogachev, A.
    Fedosenko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/385181.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    diamond-like coatings
    polytetrafluoroethylene
    polyurethane
    friction
    Opis:
    The results of studies show the deposition conditions of the titanium-nitride based coatings and their structure influence on the tribological characteristics of the dry friction and in the diesel fuel. Tribological characteristics of multilayered systems on the basis of diamond-like coatings (DLC) have been studied. The deposition of the systems onto small-size cutting tools is found efficient for improving their service characteristics. When depositing the coatings to the cutting tool surface the microrelief of edges is not distorted and the service life increases 1.3 - 1.5 times. The morphology and tribological behaviour of composite and multi-layer polymer coatings based on polytetrafluoroethylene (PTFE) and polyurethane (PU) are studied after deposition by means the method of electron beam dispersion. It is shown possibility to produce fine-film systems based on polyurethane with polytetrafluoroethylene as filler that possess high tribological performance.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 115-117
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control of a workpiece holder with piezo-electric-mechanical actuation
    Autorzy:
    Bakker, O. J.
    Popov, A.
    Ratchev, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1429345.pdf
    Data publikacji:
    2008
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    fixturing technology
    active fixture
    fixture control
    dynamics modelling
    piezoelectric actuation
    Opis:
    The main focus of research in part-fixture mechanics has been in the static deformation and part constraints. Little attention has been paid to the dynamic behaviour of these systems. However, the dynamics of the system largely determines the obtained precision during the machining process. The part is modelled as a lumped mass-spring model and the clampers and locators of the fixture are modelled as spring-dampers. The fixture frame is considered to be much stiffer than the locators, such that it provides zero displacement boundary conditions to the locators. In this study a piezoelectric actuator is utilized to provide adaptive clamping forces. The analysis has shown that position feedback can be used to minimize unnecessary displacement of the workpiece. Additionally, a lag filter can improve the steady state response.
    Źródło:
    Journal of Machine Engineering; 2008, 8, 3; 17-28
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technological standardization
    Tekhnologicheskaja standartizacija
    Autorzy:
    Kirichenko, I.
    Morneva, M.
    Kashura, A.
    Popov, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/792013.pdf
    Data publikacji:
    2015
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    standardization
    technological cycle
    production
    interchangeability
    typification
    conformity assessment
    effectiveness
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2015, 15, 3
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiz kharakteristik kontakta poverkhnostejj s pervonachalnym linejjnym i tochechnym kasaniem
    Analysis of the characteristics of the contact surface initially, linear and point touch
    Autorzy:
    Popov, A.
    Kipreev, Y.
    Savenkov, O.
    Marchenko, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/76500.pdf
    Data publikacji:
    2015
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    Hertz theory
    Popov theory
    geometrical characteristics
    contact surface
    linear touch
    point touch
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 2
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of rolling friction with sliding
    Modelirovanie processa trenija kachenija so skolzheniem
    Autorzy:
    Kirichenko, I.
    Kashura, A.
    Morneva, M.
    Popov, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/792332.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    friction force
    adhesion
    rolling friction
    contact area
    sliding friction
    wheel
    locomotive
    thrust
    mathematical model
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 2
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of injection technologies in the device of ground constructions in different geological terms
    Zastosowanie technik iniekcyjnych w celu posadowienia konstrukcji w różnych warunkach geologicznych
    Autorzy:
    Dudlya, N. A.
    Popov, A. V.
    Telnih, N. N.
    Tsaplin, E. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/300063.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    technologie iniekcyjne
    injection technologies
    Opis:
    A theoretical ground and examples of successful application of injection re-enforcement of soils for the improvement of his uniformity and rise of bearing strength is given in foundation of different buildings.
    W artykule omówiono podstawy teoretyczne i przykłady skutecznego zastosowania technologii iniekcyjnych w celu poprawy spójności gruntów oraz podwyższenia ich wytrzymałości dla posadowienia fundamentów budynków.
    Źródło:
    Wiertnictwo, Nafta, Gaz; 2009, 26, 3; 507-515
    1507-0042
    Pojawia się w:
    Wiertnictwo, Nafta, Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic calculation of a rotary engine with external heat supply based on the ideal rallis cycle
    Autorzy:
    Usenkov, Roman A.
    Popov, Igor A.
    Gortyshov, Yuri F.
    Kokhanova, Svetlana Y.
    Latypov, Ravil A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2106207.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    thermodynamic calculation
    ideal cycle
    work
    heat
    external combustion engine
    Opis:
    The design and kinematic scheme of the operation of a rotary external combustion engine with offset shafts have been developed. Expressions are obtained that make it possible to calculate the values of the increasing and decreasing functions of the working volume of the hot and cold cavities with a change in the angle of rotation of the rotor. An expression is obtained for calculating the compression ratio in the cold cavity of a rotary heat engine with an external heat supply. An expression has been determined that makes it possible to calculate the total torque of a rotary external combustion engine. A comparative analysis of the torque values of a rotary heat engine with an external heat supply and a Wankel engine is carried out. An assessment of the efficiency of an external combustion engine with offset shafts is carried out. Based on the thermodynamic calculations using ideal Erickson and Rallis cycles for a rotary external combustion engine, the processes occurring inside the hot and cold cavities of a heat engine are described. The thermodynamic condition parameters at the characteristic points of the cycle are determined and expressions are obtained that determine the thermal efficiency of the ideal Erickson and Rallis cycles in relation to the considered external combustion engine. A method for calculating the ideal cycle for an external combustion engine with offset shafts is presented.
    Źródło:
    Acta Mechanica et Automatica; 2022, 16, 1; 40--47
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Defects of Non-Stoichiometry and Dynamic Stability of SnTe Crystal Lattice
    Autorzy:
    Rogacheva, E. I.
    Sinelnik, N. A.
    Nashchekina, O. N.
    Popov, V. P.
    Lobkovskaya, T. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929741.pdf
    Data publikacji:
    1993-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.70.Bv
    65.70.+y
    Opis:
    The temperature dependencies of coefficient of linear expansion α in the range of 4.2-300 K were obtained for SnTe samples with various degrees of deviation from stoichiometry. For the sample of stoichiometric composition in the α vs. temperature curves the anomalies connected with ferroelectric phase transition were detected. It was found that within cubic phase existence region α isotherms have a minimum at 50.4 at.% Te. Maximum dynamic stability at indicated composition is believed to be associated with the formation of vacancy superstructure.
    Źródło:
    Acta Physica Polonica A; 1993, 84, 4; 733-736
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray Synchrotron Studies of Nanostructure Formation in High Temperature - Pressure Treated Silicon Implanted with Hydrogen
    Autorzy:
    Wieteska, K.
    Wierzchowski, W.
    Graeff, W.
    Misiuk, A.
    Barcz, A.
    Bryja, L.
    Popov, V. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2035493.pdf
    Data publikacji:
    2002-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.-a
    61.46.+w
    Opis:
    The effects of various high temperature-pressure treatments in Czochralski grown silicon (Cz-Si) implanted with 130 keV hydrogen to the dose of 4times10$\text{}^{16}$ cm$\text{}^{-2}$ were investigated using synchrotron X-ray topographic methods and rocking curve measurements. The high temperature- pressure processes included 10 h annealing at 450°C, 650°C, and 725°C at argon pressure 12 kbar and 1 bar. The topographic investigations were performed with projection and section methods in back-reflection and transmission geometry. It was found that annealing resulted in significantly reduced strain induced by the implantation, which became undetectable with presently used very sensitive synchrotron arrangement. A significant difference between the Cz-Si:H samples annealed at high and atmospheric pressure was observed. In the first case a distinct topographic contrast attributed to the formation of comparatively larger inclusions was observed. This effect was different at different temperatures. The samples annealed at enhanced pressure were more uniform and often produced significant interference effects.
    Źródło:
    Acta Physica Polonica A; 2002, 102, 2; 239-244
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of Mechanical Alloying for Production of Aluminium Matrix Composites with Non-Agglomerated Nanodiamond Reinforcing Particles
    Autorzy:
    Popov, V.
    Prosviryakov, A.
    Sagalova, T.
    Többens, D.
    Kiryukhantsev-Korneev, Ph.
    Powiązania:
    https://bibliotekanauki.pl/articles/1375581.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Ni
    81.20.Ev
    Opis:
    Agglomeration is the main problem that prevents large-scale implementation of nanodiamonds in the production of composites. Mechanical alloying was applied for crushing the agglomerates and to obtain uniform distribution of the primary nanodiamond particles in aluminium matrix composites. The commonly used X-ray diffraction method fails to detect non-agglomerated diamond nanoparticles 5 to 6 nm in size, if they are incorporated in a metal matrix. Synchrotron radiation was used for the identification of non-agglomerated nanodiamonds. Scanning electron microscopy and synchrotron investigation showed that mechanical alloying does not lead to transformation of the diamond structure into other allotropic forms of carbon and the nanodiamond reinforcing particles are uniformly distributed in the aluminium matrix.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4; 1008-1011
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetoelastic Anomalies and Suppression of Jahn-Teller Distortions in La$\text{}_{1-x}$Sr$\text{}_{x}$MnO$\text{}_{3}$ by Pulsed Magnetic Fields
    Autorzy:
    Kadomtseva, A. M.
    Popov, Yu. F.
    Vorob'ev, G. P.
    Kamilov, K. I.
    Ivanov, V. Yu.
    Mukhin, A. A.
    Balbashov, A. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013240.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Kz
    75.50.Pp
    Opis:
    Thermal expansion Δl/l(T) and magnetostriction λ$\text{}_{∥, ⊥ }$(H,T) in the pulsed magnetic fields H up to 250 kOe were studied in the single La$\text{}_{1-x}$Sr$\text{}_{x}$MnO$\text{}_{3}$ crystals (x=0.1, 0 .125, and 0.15) at temperatures T=10-320 K. Anomalies in the Δl/l (T) curves were observed near a charge (polaron) ordering (T$\text{}_{p}$) and structural transitions between orthorhombic Jahn-Teller distorted O' phase and high temperature orthorhombic (pseudocubic) O$\text{}^{*}$ one (T'$\text{}_{s}$). A noticeable increase in the field-induced magnetostriction λ$\text{}_{∥, ⊥ }$(H) was revealed in the O' phase at T$\text{}_{p}$
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 599-602
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impedance Spectra of As-Grown and Heat Treated $Na_{0.5}Bi_{0.5}TiO_3$ Crystals
    Autorzy:
    Kruzina, T.
    Sidak, V.
    Trubitsyn, M.
    Popov, S.
    Tuluk, A.
    Suchanicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398237.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    77.84.-s
    43.58.Bh
    72.80.Rj
    Opis:
    The complex impedance spectra Z*(ω) were studied for as-grown and annealed in air $Na_{0.5}Bi_{0.5}TiO_3$ single crystals. Experimental data showed that annealing significantly increased impedance and led to appearance of low frequency Z* relaxation. The detected relaxation processes were associated with charge transfer within the regions with initial and reduced after annealing concentration of oxygen vacancies.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 816-818
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A low diversity shallow water lingulid brachiopod-gastropod association from the Upper Ordovician of Kyrgyz Range
    Autorzy:
    Popov, L E
    Ebbestad, J.O.R.
    Mambetov, A.
    Apayarov, F.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/21229.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Kyrgyz Range
    Upper Ordovician
    paleobiogeography
    Brachiopoda
    Almaly Formation
    Lingulida
    Gastropoda
    lingulid
    Ordovician
    Tunisiglossa almalensis
    Ptychonema agyris
    paleontology
    brachiopod-gastropod association
    Opis:
    A low diversity association made up of the lingulid Tunisiglossa almalensis Popov and Mambetov, sp. nov. and the gastropod Ptychonema agyris Ebbestad, sp. nov. is described from the Upper Member of the Almaly Formation at Kyrgyz Range, North Tien Shan, Kyrgyzstan/Kazakhstan. The specimens co−occur in dense coquinas, made up of different sized individuals, deposited in a shallow water, intertidal, and storm driven depositional environment. The lingulid shells display a completely reduced dorsal pseudointerarea typical of Glossellinae, and the smooth shell lacking fine external granulation, radial or pitted ornament, a small ventral pseudointerarea, and no dorsal median ridge place it in the hitherto monotypic Tunisiglossa known previously only from the Lower Ordovician (Tremadocian) Sanrhar Formation of Libya. It compares with Ectenoglossa sorbulakensis that is widespread in the lower to middle Caradocian Anderken Formation of Chu−Ili Range in southern Kazakhstan. Gastropods of this age have not been reported earlier in Kyrgyzstan; neither can Ptychonema be compare with any taxon in the gastropod association earlier described from the contemporary Anderken Formation in Kazakhstan. Ptychonema is otherwise commonly associated with peri−Gondwana terranes, but the Late Ordovician dispersal pattern of the genus is unknown. Overall, however, the Upper Ordovician faunas of North Tien Shan show close similarities to contemporaneous faunas of the Chu−Ili terrane, which have strong biogeographic signatures linking them to the faunas of South and North China.
    Źródło:
    Acta Palaeontologica Polonica; 2007, 52, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Search for Chelyabinsk Meteorite Fragments in Chebarkul Lake Bottom (GPR and Magnetic Data)
    Autorzy:
    Buzin, V.
    Edemsky, D.
    Gudoshnikov, S.
    Kopeikin, V.
    Morozov, P.
    Popov, A.
    Prokopovich, I.
    Skomarovsky, V.
    Melnik, N.
    Berkut, A.
    Merkulov, S.
    Vorovsky, P.
    Bogolyubov, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/307795.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    Chelyabinsk meteorite
    Ground Penetrating Radar
    Opis:
    The paper summarizes experimental efforts of the Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN) undertaken in search of the biggest part of Chelyabinsk meteorite in the bottom of lake Chebarkul, South Ural, Russia, and to estimate the ecological effects of its subsequent excavation.
    Źródło:
    Journal of Telecommunications and Information Technology; 2017, 3; 69-78
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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