Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Incoherent" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-10 z 20
Tytuł:
Development of Methodological, Hardware, and Software of the Incoherent Scatter Radar of Institute of Ionosphere (Kharkiv, Ukraine)
Autorzy:
Emelyanov, Leonid
Miroshnikov, Artem
Powiązania:
https://bibliotekanauki.pl/articles/27311912.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
incoherent scatter radar
incoherent scatter signal
signal reception and processing
ionospheric plasma parameter
Opis:
We present the met determinate hodological features and new subsystem for receiving, digitizing and processing signals at the intermediate frequency of the incoherent scatter (IS) radar. The implemented method, subsystem and flexible software made it possible to avoid the influence of a number of instrumental factors on the accuracy of determining the quadrature components of the IS signal correlation function used to determine the ionospheric parameters, to adapt the digital filtering parameters, the value of the correlation delay step and the number of ordinates of the measured correlation function to IS signals from different altitudes and under different space weather conditions, to effectively test radar systems for the subsequent taking into account hardware factors and, thus, to improve the accuracy of the measured ionospheric parameters. The experimental results are presented.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 3; 579--586
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the propagation of laser beams array with coherent and incoherent combination in dynamic atmosphere turbulence
Autorzy:
Deng, Wantao
Wang, Chengcheng
Gan, Chunquan
Xue, Liangping
Xia, Huijun
Wang, Peng
Yang, Huan
Powiązania:
https://bibliotekanauki.pl/articles/2086761.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
laser propagation
dynamic atmospheric turbulence
coherent combination
incoherent combination
beam quality
Opis:
High-power laser systems mostly use coherent or incoherent combined beams to achieve higher laser output power to satisfy the application. However, the far-field beam quality of laser will be reduced when propagating over atmosphere. Based on the propagation model of laser beams array, we use atmospheric coherence length, laser duration and average wind velocity to construct dynamic atmospheric turbulence which is characterized as a phase screen sequence. Meanwhile, considered as the indexes to evaluate beam quality, peak intensity and intensity in bucket are comparatively analysed in coherent and incoherent combined beams in far-field. The results indicate that in weaker turbulence circumstances, coherent combined beam has an advantage compared with the incoherent combined beams when laser duration is short, and coherent combination is more suitable for pulsed laser. With laser duration is increasing, the beam quality of incoherent and coherent combined beams both decrease and tend to be close. In stronger turbulence circumstances, the corresponding laser duration will be shorter when the beam quality of coherent combined beams is extraordinary close to that of incoherent combined beams. The researches can provide important data for high-power laser system to select the optimal beam combination mode to improve its performance.
Źródło:
Optica Applicata; 2022, 52, 2; 243--257
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incoherent Dictionary Learning for Sparse Representation in Network Anomaly Detection
Autorzy:
Andrysiak, Tomasz
Saganowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1373708.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
dictionary learning
sparse representation
anomaly detection
Opis:
In this article we present the use of sparse representation of a signal and incoherent dictionary learning method for the purpose of network traffic analysis. In learning process we use 1D INK-SVD algorithm to detect proper dictionary structure. Anomaly detection is realized by parameter estimation of the analyzed signal and its comparative analysis to network traffic profiles. Efficiency of our method is examined with the use of extended set of test traces from real network traffic. Received experimental results confirm effectiveness of the presented method.
Źródło:
Schedae Informaticae; 2015, 24; 63-71
0860-0295
2083-8476
Pojawia się w:
Schedae Informaticae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the spectral efficiency of incoherent optical MIMO systems
Autorzy:
Siuzdak, J
Kowalczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/174480.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
data transmission
optical fiber
MIMO
spectral efficiency
Opis:
Spectral efficiency of incoherent optical MIMO systems is investigated. It is proved that under the best conditions (no channel crosstalk at the receiver) incoherent optical MIMO transmission gives potentially a better spectral efficiency than single channel transmission above a certain value of SNR in a single channel system, which varies from 9 dB for 2×2 MIMO to 12.3 dB for 4×4 MIMO. However, in practical optical 2×2 MIMO transmission, this border value of SNR is much higher and is around 25–30 dB.
Źródło:
Optica Applicata; 2013, 43, 3; 497-503
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tunneling through the Quantum Dot Coupled to Incoherent Superconductor
Autorzy:
Donabidowicz, A.
Domański, T.
Powiązania:
https://bibliotekanauki.pl/articles/2047329.pdf
Data publikacji:
2007-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.23.-b
74.20.Fg
74.45.+c
Opis:
We study the equilibrium and non-equilibrium properties of the strongly correlated quantum dot coupled between normal and superconducting leads. The effect of electron pair coherence, Coulomb interactions, and d-wave anisotropy of the order parameter are discussed with a particular account of their influence on a charge tunneling through the quantum dot.
Źródło:
Acta Physica Polonica A; 2007, 111, 5; 671-682
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O istocie struktur organizacji: skonsolidowana jedność czy niespójna wielość?
On the Nature of Organizational Structures: Consolidated Unity or Incoherent Multeity?
Autorzy:
Mreła, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/906516.pdf
Data publikacji:
1982
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Opis:
The article discusses this direction of research procedure which appears to be especially promising when we are analyzing the nature of organizational structures. In line with this initial assumption the author distinguishes between: overall level (referring to the organizational structure as an entity) and elementary level concerning components parts of the structure such as power hierarchy, management area, labour division etc). Can we speak about the organizational structure as coherent entity on the basis of empirical knowledge about component parts of the structure and relationships between level and manner of the organization's structuring in a given respect and level and manner of its structuring in other respects.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 1982, 25
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incoherent Discriminative Dictionary Learning for Speech Enhancement
Autorzy:
Shaheen, D.
Dakkak, O. A.
Wainakh, M.
Powiązania:
https://bibliotekanauki.pl/articles/308116.pdf
Data publikacji:
2018
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
ADMM
l1 minimization algorithms
sparse coding
speech enhancement
supervised dictionary learning
Opis:
Speech enhancement is one of the many challenging tasks in signal processing, especially in the case of nonstationary speech-like noise. In this paper a new incoherent discriminative dictionary learning algorithm is proposed to model both speech and noise, where the cost function accounts for both “source confusion” and “source distortion” errors, with a regularization term that penalizes the coherence between speech and noise sub-dictionaries. At the enhancement stage, we use sparse coding on the learnt dictionary to find an estimate for both clean speech and noise amplitude spectrum. In the final phase, the Wiener filter is used to refine the clean speech estimate. Experiments on the Noizeus dataset, using two objective speech enhancement measures: frequency-weighted segmental SNR and Perceptual Evaluation of Speech Quality (PESQ) demonstrate that the proposed algorithm outperforms other speech enhancement methods tested.
Źródło:
Journal of Telecommunications and Information Technology; 2018, 3; 42-54
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Comparison of Several Algorithms for Localization of Wideband Sources
Autorzy:
Ougraz, Hassan
Safi, Said
Boumezzough, Ahmed
Frikel, Miloud
Powiązania:
https://bibliotekanauki.pl/articles/24200743.pdf
Data publikacji:
2023
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
coherent
DOA estimation
incoherent
localization
wideband sources
Opis:
In recent years, researchers have tried to estimate the direction-of-arrival (DOA) of wideband sources and several novel techniques have been proposed. In this paper, we compare six algorithms for calculating the DOA of broadband signals, namely coherent subspace signal method (CSSM), two-sided correlation transformation (TCT), incoherent multiple signal classification (IMUSIC), test of orthogonality of frequency subspaces (TOFS), test of orthogonality of projected subspaces (TOPS), and squared TOPS (S-TOPS). The comparison is made through computer simulations for different parameters, such as signal-to-noise ratio (SNR), in order to establish the efficiency and performance of the discussed methods in noisy environments. CSSM and TCT require initial values, but the remaining approaches do not need any preprocessing.
Źródło:
Journal of Telecommunications and Information Technology; 2023, 3; 21--29
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanometer-Scale Incoherent Imaging Using Laser-Plasma EUV Source
Autorzy:
Wachulak, P.
Bartnik, A.
Fiedorowicz, H.
Kostecki, J.
Powiązania:
https://bibliotekanauki.pl/articles/1490098.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
52.38.Ph
52.50.Dg
41.50.+h
42.30.Va
42.79.Ci
Opis:
Various imaging methods and techniques capable of reaching a nanometer spatial resolution are currently under development. One of them is an extreme ultraviolet microscopy, based on the Fresnel zone plates. In this paper a compact, high-repetition, laser-plasma EUV source, with a gas puff target, capable of emitting quasi-monochromatic radiation at 13.8 nm wavelength was used in the first demonstration of a desk-top EUV transmission microscopy with a spatial (half-pitch) resolution of 50 nm. EUV microscopy images of objects with various thicknesses and the spatial resolution measurements using the knife-edge test are presented.
Źródło:
Acta Physica Polonica A; 2012, 121, 2; 450-453
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Edycja 3 – Założenia Programowe
Edition 3 – Program Assumptions / Édition 3 – Hypothèses du Programme
Autorzy:
Brogowski, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/424697.pdf
Data publikacji:
2019
Wydawca:
Akademia Sztuk Pięknych w Gdańsku
Tematy:
Andrzej Pierzgalski
Leszek Brogowski
Album primaaprilisowy
Alphons Allais
Niezborni
pułapki dokumentu
monochromom
April Fools’ Day Album
Incoherent
trap of document
monochrom
Źródło:
Sztuka i Dokumentacja; 2019, 20; 208-214
2080-413X
Pojawia się w:
Sztuka i Dokumentacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 20

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies