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Wyszukujesz frazę "Nikiforov, S." wg kryterium: Wszystkie pola


Wyświetlanie 1-9 z 9
Tytuł:
DLC Coatings by $PI^{3}D:$ Low-Voltage žersus High-Voltage Biasing
Autorzy:
Ryoo, H.
Nikiforov, S.
Rim, G.
Shenderey, S.
Oh, H.
Chung, S.
Powiązania:
https://bibliotekanauki.pl/articles/1807961.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
52.77.Dq
68.35.Gy
68.55.-a
78.30.-j
Opis:
Diamond-like carbon (DLC), in particular hydrogenated amorphous carbon (a-C:H) films have been formed on various conductive and dielectric materials by plasma immersion ion implantation and deposition $(PI^{3}D)$ processing. Effect of pulse voltage and other process parameters on the film properties was investigated. It was found that for conductive substrates, a low-voltage ( ≈1 kV), high repetition rate pulsing provides better overall film performance comparing to that obtained by applying higher voltages, which is also favourable for conformal treatment of 3D workpieces. However, short 1-2 μs, high-voltage 5-20 kV pulses are required for dielectric workpieces several millimeter thick. Good film adhesion was achieved by forming a Si-containing buffer layer using hexamethyldisiloxane (HMDSO) as a precursor and a low-voltage pulsing. Roughness and wettability of DLC coatings was found to be controlled by varying the bias specs and sample temperature. Very smooth films with average roughness less than 1 Å were prepared at optimised process parameters.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1146-1148
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pulsed Laser Deposition of Amorphous Co-Fe-Ni-Si-B Thin Films
Autorzy:
Gareev, R. R.
Alimpiev, S. S.
Bugoslavskii, Yu. V.
Nikiforov, S. M.
Maslov, A. I.
Shubnii, G. Yu.
Zherichin, A. N.
Powiązania:
https://bibliotekanauki.pl/articles/1955481.pdf
Data publikacji:
1997-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.70.Ak
Opis:
Soft magnetic multicomponent Co-Fe-Ni-Si-B thin films have been grown by pulsed laser deposition onto single-crystal sapphire and silicon substrates. The static hysteresis measurements for different substrate temperatures are presented. Thin films with a coercive force smaller than 1 Oe were grown at substrate temperatures from 250°C to 350°C. X-ray diffraction measurements proved that the structure of films is amorphous. The surface morphology of grown thin films was observed by scanning electron microscopy. The chemical composition of deposited films corresponds to the composition of bulk alloy.
Źródło:
Acta Physica Polonica A; 1997, 91, 2; 321-324
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bound State Solutions of the s-wave Schrodinger Equation for Generalized Woods-Saxon plus Mie-Type Nuclei Potential within the framework of Nikiforov-Uvarov Method
Autorzy:
Ita, Benedict Iserom
Hitler, Louis
Powiązania:
https://bibliotekanauki.pl/articles/1178381.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Bound state
Eigen functions
Mie-type
Nikiforov-Uvarov Method
Schrodinger
Woods-Saxon
Opis:
The solutions of the Schrӧdinger equation with Generalized Woods-Saxon plus Mie-type potentials (GWSMP) have been presented using the Pekeris-like approximation of the coulomb term and parametric Nikiforov-Uvarov (NU) method. The bound state energy eigenvalues and the corresponding un-normalized eigen functions are obtained in terms of Jacobi polynomials. Special cases of potential consideration have also been discussed.
Źródło:
World Scientific News; 2017, 77, 2; 378-384
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Turán’s Theorem Implies Stanley’s Bound
Autorzy:
Nikiforov, V.
Powiązania:
https://bibliotekanauki.pl/articles/31557199.pdf
Data publikacji:
2020-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
graph spectral radius
Stanley’s bound
Turán’s theorem
clique number
Motzkin-Straus’s inequality
walks
Opis:
Let $G$ be a graph with $m$ edges and let \(\rho\) be the largest eigenvalue of its adjacency matrix. It is shown that \[\rho≤\sqrt{2\bigg(1-\lfloor1/2+\sqrt{2m+1/4} \rfloor^{-1}\bigg)m,}\] improving the well-known bound of Stanley. Moreover, writing \(\omega\) for the clique number of $G$ and $W_k$ for the number of its walks on $k$ vertices, it is shown that the sequence \[\bigg\{\big((1-1/\omega)W_{2^k}\big)^{1/2^k} \bigg\}_{k=1}^∞\] is nonincreasing and converges to \(\rho\).
Źródło:
Discussiones Mathematicae Graph Theory; 2020, 40, 2; 601-605
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bound State Solutions of the Schrӧdinger’s Equation with Manning-Rosen Plus a Class of Yukawa Potential Using Pekeris-like Approximation of the Coulomb Term and Parametric Nikiforov-Uvarov
Autorzy:
Ita, B. I.
Louis, H.
Magu, T. O.
Nzeata-ibe, N. A.
Powiązania:
https://bibliotekanauki.pl/articles/1178569.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Jacobi polynomials
Manning-Rosen potential
Parametric Nikiforov-Uvarov method
Pekeris-like approximation
Schrӧdinger equation
Yukawa potential
Opis:
The solutions of the Schrӧdinger equation with Manning-Rosen plus a class of Yukawa potential (MRCYP) have been presented using the Pekeris-like approximation and parametric Nikiforov-Uvarov (NU) method. The bound state energy eigenvalues and the corresponding un-normalized eigen functions are obtained in terms of Jacobi polynomials. Also, inversely quadratic Yukawa, Yukawa, Manning-Rosen and coulomb potentials have been recovered from the mixed potential and their Eigen values obtained. The Numerical results are computed for some values of n at l = 0 with α = 0.01, 0.1, 2 and 5 using python 3.6 programming, and these results could be applied to molecules moving under the influence of MRYP potential as negative energy eigenvalues obtained indicate a bound state system.
Źródło:
World Scientific News; 2017, 70, 2; 312-319
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Substrate-Induced Strain in Epitaxial Lead Chalcogenides by Galvanomagnetic Effect Rotational Dependence
Autorzy:
Berchenko, N. N.
Dobriansky, O. A.
Korovin, A. V.
Nikiforov, A. Yu.
Yakovyna, V. S.
Zogg, H.
Powiązania:
https://bibliotekanauki.pl/articles/1968034.pdf
Data publikacji:
1997-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.80.Jc
72.20.My
Opis:
On the example of the PbTe and Pb$\text{}_{0.77}$Sn$\text{}_{0.23}$Te on BaF$\text{}_{2}$ the possibility of using the weak magnetic field resistance technique for the evaluation of mismatch-thermally induced strains in semiconductors with multivalley band structure is discussed.
Źródło:
Acta Physica Polonica A; 1997, 92, 4; 715-718
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-Ray Absorption Studies of Ge Layers Buried in Silicon Crystal
Autorzy:
Demchenko, I. N.
Ławniczak-Jabłońska, K.
Zhuravlev, K. S.
Piskorska, E.
Nikiforov, A. I.
Welter, E.
Powiązania:
https://bibliotekanauki.pl/articles/2030656.pdf
Data publikacji:
2002-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.80.Ey
78.70.Dm
81.05.Gc
Opis:
Polarization-dependent X-ray absorption spectroscopy was used to study the local microstructure of Ge layers buried in silicon. The layers with thickness from 6 to 20 monolayers of Ge were grown by molecular beam epitaxy on Si substrate and were covered by Si (20 nm). To investigate the morphology of grown structures, X-ray absorption near edge structure and extended X-ray absorption fine structure analysis of the Ge K-edge was done. The performed qualitative analysis proves that X-ray absorption spectra are very sensitive to the local order in the formed structures and are sources of unique information about morphology of the buried Ge layers. Using these techniques we were able to observe the changes in atomic order around the Ge atoms in investigated buried layers and compare the formed atomic order with that in crystalline Ge. A substantial increase in intensity, broadening and chemical shift of the X-ray absorption near edge structure spectrum for 8 ML were observed. It can be related to the increase in density of electron states caused by increase in the localization of the states due to potential appearing at the Ge island boundaries and indicated the formation of quantum dots. The observed in-plane modulations of radial distribution and out-of-plane for different layers were discussed.
Źródło:
Acta Physica Polonica A; 2002, 101, 5; 709-717
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wholesaler to retailer goods forwarding controlling
Контроллинг перевозочного процесса при доставке товарных партий в торговую сеть
Autorzy:
Nikiforov, O.
Levkin, G.
Simak, R.
Mochalin, S.
Dzyubina, K.
Powiązania:
https://bibliotekanauki.pl/articles/375464.pdf
Data publikacji:
2016
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
controlling
logistics
wholesale
retail chain
algorithm
model
software
kontrolling
logistyka
sprzedaż hurtowa
łańcuch detaliczny
algorytm
oprogramowanie
Opis:
The modern trends in the development of logistics controlling through the prism of collaboration between wholesale companies and retail chains have been considered. The nature and structure of cargo transportation by the wholesale company to he retail chain have been analysed. The key transportation processes have been identified and the reliance on transportation drivers-forwarders for their effectiveness has been determined. The study has resulted in the program-mathematical approach to the transportation controlling automation used by the wholesale company to deliver goods to the retail chain as well as the mathematical model of the system information flow. The practical recommendations for the mathematical software implementation using the AWS Forwarder software product as an example have been illustrated.
Рассмотрены современные тенденции развития логистического контроллинга через призму сотрудничества оптовых предприятий и розничных торговых сетей. Проанализирована суть и структура процесса транспортировки грузов оптовым предприятием в розничную торговую сеть. Идентифицированы ключевые процессы транспортировки и определено влияние водителей -экспедиторов на их эффективность. В результате проведение исследования сформирован программно-математический подход к автоматизации контроллинговых операций процесса транспортировки грузов оптовым предприятием в розничную торговую сеть, а также математическая модель информационных потоков данной системы. Приведены практические рекомендации по реализации программно-математического обеспечения на примере программного продукта «АРМ Экспедитор»
Źródło:
Transport Problems; 2016, 11, 2; 37-50
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Condition for application of logistic principles in practice of urban public passenger transport in the city of Omsk
Autorzy:
Mochalin, S.
Kasper, M.
Nikiforov, O.
Levkin, G.
Powiązania:
https://bibliotekanauki.pl/articles/375456.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
passenger public transport
logistic system
logistic principles
efficiency
quality
pasażerski transport publiczny
system logistyczny
zasady logistyki
wydajność
jakość
Opis:
The task of increasing efficiency and quality of public transport has gotten special acuteness for large cities of Russia in connection with expansion of service by commercial carriers. There have no works done on the city of Omsk, where the transport system has its own characteristics. In this paper, characteristics of Omsk urban public transport are researched. The scheme that clearly demonstrates what factors have a negative impact on the development and functioning of the Omsk passenger transport system is developed. The measures that improve the efficiency of the passenger transportation system and provide an opportunity to advance the implementation of logistics principles are proposed. The activities took into account the experience of reforming the public transport system in other cities, the characteristics of the Omsk city system and a view to engagement of other scientists in this field of science.
Źródło:
Transport Problems; 2017, T. 12, z. spec.; 71-86
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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