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Wyszukujesz frazę "Szczesny, W." wg kryterium: Autor


Wyświetlanie 1-6 z 6
Tytuł:
Detecting rows and columns of contingency table, which outlie from a total positivity pattern
Autorzy:
Szczęsny, W.
Powiązania:
https://bibliotekanauki.pl/articles/205844.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
monitor graficzny
tablica wielodzielcza
wartość oddalona
computer-intensive methods
contingency table
graphical display
occupational mobility
outliers
scatterplot
total positive dependence
Opis:
It is known that the procedure called Grade Correspondence Analysis (GCA) transforms any bivariate contingency table into an approximation of table with a very regular positive dependence, called total positivity of order two (TP2). This fact is reminded in Sections 2 and 3, illustrated there by the GCA transformation of an artificial contingency table [T_8x6]. A search for rows and/or columns of table [T_8x6], which most strongly outlie from the TP2 pattern, is described in Section 4. Section 5 presents the outliers found in three large contingency tables, containing the occupational mobility data from Britain and Poland and the parliamentary election data from Poland.
Źródło:
Control and Cybernetics; 2000, 29, 4; 1059-1073
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of Nonlinear Crosstalk in Optical Fibre Wavelength-Division Multiplexed Telecommunication Systems
Autorzy:
Szczęsny, W.
Marciniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/2008299.pdf
Data publikacji:
1999-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.-i
42.79.Sz
Opis:
Nonlinear effects in optical fibres play an important role for transmission parameters in wavelength-division multiplexed telecommunication systems. Those effects cause an additional attenuation, distortion and inter-channel interference of the multi-wavelength optical signal. Therefore, it is important to optimise inter-channel wavelength span in a wavelength-division multiplexed system, and also the optical power and transmission bit-rate. Another drawback is a limitation of the number of the transmitted optical channels and network nodes. The paper reports the results of the analysis and computer simulations of the wavelength-division multiplexed transmission through fibre link in a presence of nonlinear effects: self-phase modulation, cross-phase modulation, Raman scattering, four-wave mixing. The analysis enables network designers to evaluate the system performance and to optimise transmission parameters.
Źródło:
Acta Physica Polonica A; 1999, 95, 5; 859-867
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of nonlinear optical phenomena on dense wavelength division multiplexed transmission in fibre telecommunication systems
Autorzy:
Szczęsny, W.
Marciniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/308745.pdf
Data publikacji:
2000
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
optical communications
WDM systems
nonlinear transmission
Opis:
In the paper results of analysis of nonlinear phenomena in optical fibres: Self-Phase Modulation, Cross-Phase Modulation, Four-Wave Mixing and Stimulated Raman Scattering and their influence on Dense-Wavelength Division Multiplexed system performance are reported. Different nonuniform optical channel allocation schemes based on ITU Recommendation G.692 100 GHz frequency grid are compared with uniform channel distribution. The level of nonlinear cross-talk is determined for different levels of the total optical power. As an example a 10 Gbit/s D-WDM dispersion-shifted single mode fibre link with dispersion-compensating fibres is envisaged. The directions for optimization of the system design in view of actual international standardization trends are pointed out.
Źródło:
Journal of Telecommunications and Information Technology; 2000, 1-2; 61-65
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robustness: important slogan of temporary statistics
Autorzy:
Pleszczyńska, E.
Szczęsny, W.
Powiązania:
https://bibliotekanauki.pl/articles/747575.pdf
Data publikacji:
1978
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Robustness and adaptive procedures (parametric inference)
Opis:
Artykuł nie zawiera streszczenia
The article contains no abstract
Źródło:
Mathematica Applicanda; 1978, 6, 12
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power penalty caused by Stimulated Raman Scattering in WDM Systems
Autorzy:
Pietrzyk, S.
Szczęsny, W.
Marciniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/308751.pdf
Data publikacji:
2000
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
optical communications
WDM systems
Stimulated Raman Scattering
Opis:
In this paper we present results of an investigation into the power penalty introduced by Stimulated Raman Scattering (SRS) in WDM systems with concentration on application of dispersion-shifted single-mode optical fibres (G.653) and unequal channel allocation schemes. System parameters based on ITU-T Recommendation G.692 and analytic formulas were used in calculations. It is shown that SRS does present a practical limitation to the multichannel systems. We also indicate limitations of the G.692 Recommendation and we point at directions of study in the area of nonlinear phenomena and multichannel systems.
Źródło:
Journal of Telecommunications and Information Technology; 2000, 1-2; 52-58
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical analysis of the departure from proportionality in the 1991 election in Poland
Autorzy:
Bondarczuk, Z.
Ciok, A.
Szczęsny, W.
Powiązania:
https://bibliotekanauki.pl/articles/747633.pdf
Data publikacji:
1993
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
.
Opis:
.
New statistical measures of departure from proportional representation, introduced in Bondarczuk, Kowalczyk, Pleszczyńska and Szczęsny (1992), are applied to the results of the 1991 election to the Polish Parliament. A pair of indices is used to evaluate departures from proportionality between number of votes and number of elects. One index indicates general strength of the departures, the other one indicates to which extent they are due to overrepresentation increasing (or decreasing) with number of votes. The indices are corrected in order to eliminate the influence of the distribution of votes , number of votes and size of representation. The correction is based on intensive computer simulation. The analysis of the election data showed significant overrepresent ation of six parties (or group of parties forming election committees) with maximal numbers of votes. On the other hand, in the subpopulation of voters formed by these six parties only, the departure from proportionality is very small.
Źródło:
Mathematica Applicanda; 1993, 22, 36
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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