Autor: Barański, Krzysztof - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: From Newton’s method to exotic basins Part I: The parameter space
Autorzy:: Barański, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/1205287.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:: This is the first part of the work studying the family $\mathfrak{F}$ of all rational maps of degree three with two superattracting fixed points. We determine the topological type of the moduli space of $\mathfrak{F}$ and give a detailed study of the subfamily $ℱ_2$ consisting of maps with a critical point which is periodic of period 2. In particular, we describe a parabolic bifurcation in $ℱ_2$ from Newton maps to maps with so-called exotic basins.
Źródło:: Fundamenta Mathematicae; 1998, 158, 3; 249-288
0016-2736
Pojawia się w:: Fundamenta Mathematicae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Hausdorff dimension and measures on Julia sets of some meromorphic maps
Autorzy:: Barański, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/1208335.pdf
Data publikacji:: 1995
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:: We study the Julia sets for some periodic meromorphic maps, namely the maps of the form $f(z) = h(exp \frac{2πi}{T}z)$ where h is a rational function or, equivalently, the maps $˜f(z) = exp (\frac{2πi}{h}(z))$. When the closure of the forward orbits of all critical and asymptotic values is disjoint from the Julia set, then it is hyperbolic and it is possible to construct the Gibbs states on J(˜f) for -α log |˜˜f|. For ˜α = HD(J(˜f)) this state is equivalent to the ˜α-Hausdorff measure or to the ˜α-packing measure provided ˜α is greater or smaller than 1. From this we obtain some lower bound for HD(J(f)) and real-analyticity of HD(J(f)) with respect to f. As an example the family $f_λ(z)=λ tan z$ is studied. We estimate $HD(J(f_λ))$ near λ = 0 and show it is a monotone function of real λ.
Źródło:: Fundamenta Mathematicae; 1995, 147, 3; 239-260
0016-2736
Pojawia się w:: Fundamenta Mathematicae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Comparison Analysis of Muck Pile Fragmentation Obtained Through the Photogrammetry Method and Based on the Kuz-Ram Empirical Model
Analiza porównawcza fragmentacji urobku wyznaczonej na podstawie metody fotogrametryczną oraz modelu Kuz-Ram
Autorzy:: Biessikirski, Andrzej
Dworzak, Michał
Twardosz, Michał
Pyra, Józef
Barański, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/318280.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Przeróbki Kopalin
Tematy:: roboty strzałowe
fragmentacja urobku
Split Desktop 2.0
Kuz-Ram
O-Pitblast
blasting works
muck pile fragmentation
Opis:: This paper presents an evaluation of muck pile fragmentation based on the Kuz-Ram empirical model. Furthermore, a comparison of the cumulative size distribution curves obtained from the photogrammetry analysis and based on the Kuz-Ram model was made. Size distribution was performed based on the Kuz-Ram model and further validated in the O-Pitblast software. It was established that the algorithm applied in O-Pitblast software was not modified. The difference between empirical results and in-situ analysis could be explained by, inter alia, the subjective assumption of the RMD index value.
W artykule przedstawiono teoretyczne podstawy wyznaczania przewidywanej fragmentacji urobku oparciu model Kuz-Ram. Dodatkowo, wykonano porównanie krzywych składu ziarnowego uzyskanych na podstawie metody fotogrametrycznej oraz modelu Kuz-Ram. Procentowy udział frakcji dla charakterystycznych wielkości ziarna wyznaczono na podstawie równania Kuz-Ram, zaś dodatkową weryfikację przeprowadzono programie O-Pitblast, przy użyciu modułu analitycznego bazującego na analizowanym modelu fragmentacji. Na podstawie przeprowadzonych badań stwierdzono brak wprowadzenia modyfikacji do algorytmu programu O-Pitblast. Uzyskane różnice procentowego udziału frakcji wyznaczonej na podstawie obliczeń teoretycznych, oraz badań in-situ, można tłumaczyć m.in. subiektywnym przyjęciem współczynnika RMD.
Źródło:: Inżynieria Mineralna; 2019, 21, 1; 259-266
1640-4920
Pojawia się w:: Inżynieria Mineralna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Automated test bench for research on electrostatic separation in plastic recycling application
Autorzy:: Regulski, Roman
Czarnecka-Komorowska, Dorota
Jędryczka, Cezary
Sędziak, Dariusz
Rybarczyk, Dominik
Netter, Krzysztof
Barański, Mariusz
Barczewski, Mateusz
Powiązania:: https://bibliotekanauki.pl/articles/2090721.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: recycling
automotive plastics waste
separation
electrostatic separator
recykling
odpady tworzyw sztucznych z samochodów
separacja
separator elektrostatyczny
Opis:: Many researchers in the developed countries have been intensively seeking effective methods of plastic recycling over the past years. Those techniques are necessary to protect our natural environment and save non-renewable resources. This paper presents the concept of an electrostatic separator designed as a test bench dedicated to the separation of mixed plastic waste from the automotive industry. According to the current policy of the European Union on the recycling process of the automotive industry, all these waste materials must be recycled further for re-entering into the life cycle (according to the circular economy). In this paper, the proposed concept and design of the test bench were offered the feasibility to conduct research and technological tests of the electrostatic separation process of mixed plastics. The designed test bench facilitated assessing the impact of positions of high-voltage electrodes, the value and polarity of the high voltage, the variable speed of feeders and drums, and also triboelectrification parameters (like time and intensity) on the process, among others. A specialized computer vision system has been proposed and developed to enable quick and reliable evaluation of the impact of process parameters on the efficiency of electrostatic separation. The preliminary results of the conducted tests indicated that the proposed innovative design of the research stand ensures high research potential, thanks to the high accuracy of mixed plastics in a short time. The results showed the significant impact of the corona electrode position and the value of the applied voltage on the separation process effectiveness. It can be concluded that the results confirmed the ability to determine optimally the values of the studied parameters, in terms of plastic separation effectiveness. This study showed that this concept of an electrostatic separator designed as a test bench dedicated for separation of mixed plastic waste can be widely applied in the recycling plastic industry.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; e136719, 1--11
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Automated test bench for research on electrostatic separation in plastic recycling application
Autorzy:: Regulski, Roman
Czarnecka-Komorowska, Dorota
Jędryczka, Cezary
Sędziak, Dariusz
Rybarczyk, Dominik
Netter, Krzysztof
Barański, Mariusz
Barczewski, Mateusz
Powiązania:: https://bibliotekanauki.pl/articles/2173591.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: recycling
automotive plastics waste
separation
electrostatic separator
recykling
odpady tworzyw sztucznych z samochodów
separacja
separator elektrostatyczny
Opis:: Many researchers in the developed countries have been intensively seeking effective methods of plastic recycling over the past years. Those techniques are necessary to protect our natural environment and save non-renewable resources. This paper presents the concept of an electrostatic separator designed as a test bench dedicated to the separation of mixed plastic waste from the automotive industry. According to the current policy of the European Union on the recycling process of the automotive industry, all these waste materials must be recycled further for re-entering into the life cycle (according to the circular economy). In this paper, the proposed concept and design of the test bench were offered the feasibility to conduct research and technological tests of the electrostatic separation process of mixed plastics. The designed test bench facilitated assessing the impact of positions of high-voltage electrodes, the value and polarity of the high voltage, the variable speed of feeders and drums, and also triboelectrification parameters (like time and intensity) on the process, among others. A specialized computer vision system has been proposed and developed to enable quick and reliable evaluation of the impact of process parameters on the efficiency of electrostatic separation. The preliminary results of the conducted tests indicated that the proposed innovative design of the research stand ensures high research potential, thanks to the high accuracy of mixed plastics in a short time. The results showed the significant impact of the corona electrode position and the value of the applied voltage on the separation process effectiveness. It can be concluded that the results confirmed the ability to determine optimally the values of the studied parameters, in terms of plastic separation effectiveness. This study showed that this concept of an electrostatic separator designed as a test bench dedicated for separation of mixed plastic waste can be widely applied in the recycling plastic industry.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; art. no. e136719
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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