Autor: Wojnar, S - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Inter-Dot Coupling in a Self-Assembled Quantum Dot System
Autorzy:: Kazimierczuk, T.
Nowak, S.
Suffczyński, J.
Wojnar, P.
Golnik, A.
Gaj, J. A.
Kossacki, P.
Powiązania:: https://bibliotekanauki.pl/articles/2047689.pdf
Data publikacji:: 2007-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.67.Hc
78.55.Et
Opis:: We present studies of resonant excitation of self-assembled CdTe/ZnTe quantum dots. Photoluminescence excitation measurements revealed existence of sharp resonances, common for photoluminescence lines attributed to different quantum dot charge states. We conclude from the ensemble of photoluminescence and photoluminescence excitation results that we observe energy transfer in coupled quantum dot pairs.
Źródło:: Acta Physica Polonica A; 2007, 112, 2; 321-324
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Real-time implementation of multiple model based predictive control strategy to air/fuel ratio of a gasoline engine
Autorzy:: Wojnar, S
Polóni, T
Šimončič, P
Rohal’-Ilkiv, B
Honek, M
Csambál, J
Powiązania:: https://bibliotekanauki.pl/articles/229632.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: model predictive control
multiple models
air/fuel ratio
spark ignition engine
ARX models
Opis:: Growing safety, pollution and comfort requirements influence automotive industry ever more. The use of three-way catalysts in exhaust aftertreatment systems of combustion engines is essential in reducing engine emissions to levels demanded by environmental legislation. However, the key to the optimal catalytic conversion level is to keep the engine air/fuel ratio (AFR) at a desired level. Thus, for this purposes more and more sophisticated AFR control algorithms are intensively investigated and tested in the literature. The goal of this paper is to present for a case of a gasoline engine the model predictive AFR controller based on the multiple-model approach to the engine modeling. The idea is to identify the engine in particular working points and then to create a global engine's model using Sugeno fuzzy logic. Opposite to traditional control approaches which lose their quality beside steady state, it enables to work with satisfactory quality mainly in transient regimes. Presented results of the multiple-model predictive air/fuel ratio control are acquired from the first experimental real-time implementation on the VW Polo 1390 cm3 gasoline engine, at which the original electronic control unit (ECU) has been fully replaced by a dSpace prototyping system which execute the predictive controller. Required control performance has been proven and is presented in the paper.
Źródło:: Archives of Control Sciences; 2013, 23, 1; 93-106
1230-2384
Pojawia się w:: Archives of Control Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Single-Photon Emission from a Highly Excited CdTe Quantum Dot
Autorzy:: Nowak, S.
Goryca, M.
Kazimierczuk, T.
Gaj, J.
Golnik, A.
Kossacki, P.
Wojnar, P.
Karczewski, G.
Powiązania:: https://bibliotekanauki.pl/articles/1811969.pdf
Data publikacji:: 2008-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.21.La
78.55.Et
78.67.-n
78.47.-p
Opis:: Time-resolved correlation measurements were performed to examine the statistics of photon emission from a single quantum dot at high excitation levels. The range of strong powers was determined by the saturation of intensity of excitonic lines. The significant contribution of pulsed background luminescence forced us to sophisticated analysis of the photoluminescence spectra. For quantum dots grown in the Stranski-Krastanov mode, one-photon emission was found to a good approximation. Fluctuation type quantum dots exhibit a significant level of multiphoton emission.
Źródło:: Acta Physica Polonica A; 2008, 114, 5; 1273-1278
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: TEM Study of the Structural Properties of Nanowires Based on Cd, Zn, Te grown by MBE on Silicon Substrates
Autorzy:: Kaleta, A.
Kret, S.
Sanchez, A.
Bilska, M.
Kurowska, B.
Szczepańska, A.
Płachta, J.
Wojnar, P.
Wojciechowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/1032910.pdf
Data publikacji:: 2017-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.05.Dz
81.07.-b
61.46.-w
62.23.Hj
81.07.Gf
61.46.Km
78.67.Uh
07.10.Pz
68.35.Gy
68.37.Lp
68.37.Og
68.37.Ma
Opis:: In this work we report on the atomic structures, elemental distribution, defects and dislocations of three types of semiconductor nanowires: ZnTe, CdTe, and complex ZnTe/(Cd,Zn)Te core/shell hetero-nanowires grown by a molecular beam epitaxy on (111) Si substrate using a vapor-liquid-solid mechanism. The structural properties and the chemical gradients were measured by transmission electron microscopy methods. The nanowires reveal mainly sphalerite structure, however wurtzite nanowires were also observed.
Źródło:: Acta Physica Polonica A; 2017, 131, 5; 1399-1405
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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