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Wyszukujesz frazę "collision probability" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Collision–attachment law of lepidolite, feldspar and quartz with bubbles in the combined cationic and anionic collector system
Autorzy:
Liu, Ziyu
Jiao, Fen
Qin, Wenqing
Wei, Qian
Powiązania:
https://bibliotekanauki.pl/articles/2175442.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
combined collector
collision probability
attachment probability
three-phase contact line
Opis:
The purpose of this study is to explore the collision–attachment law of lepidolite, feldspar and quartz during their interaction with bubbles by particle settlement method and bubble rising method under the action of combined collector. In this study, HQ-330 and dodecylamine were used as combined collector to separate lepidolite, feldspar and quartz by flotation. It also aims to analyse the relationship between collision probability, attachment probability, formation time of three-phase contact line and flotation recovery and the main factors affecting the formation time of three-phase contact line. Experimental results show that when the pH is 7 and the combined collector dosage is 100 mg/L, the separation of lepidolite from feldspar and quartz can be achieved. In the particle settlement experiments, the correlation between collision probability and flotation recovery is low, the correlation between attachment probability and flotation recovery is positive. In the bubble rising experiments, the formation time of three-phase contact line (tTPC) is negatively correlated with flotation recovery, and the combined collector changes tTPC by changing drainage time.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 155324
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling the accident probability in large-scale, maritime transportation system
Autorzy:
Blokus-Roszkowska, A.
Montewka, J.
Smolarek, J.
Powiązania:
https://bibliotekanauki.pl/articles/2069467.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
maritime transportation system
safety
collision probability
traffic simulation
semi-Markov model
Opis:
The probability of an accident in transportation systems can serve as a measure of these systems safety or risk, depending on the objective. Therefore numerous methods and models for risk evaluation, with respect to maritime, have been developed. However, these models are either too simplified, allowing relatively fast analysis but very often missing the substantial links among the model variables, or they are too slow for effective analysis, due to computational complexity, not necessarily being backed-up with the complexity of the model itself. Thereby, this paper introduces a novel method evaluating the probability of ship-ship collision in the maritime transportation system focusing on the open sea collisions, applying the queuing theory in the simulation model. The model allows relatively fast prediction as it focuses on the specific events (e.g. accidents), instead of simulating the whole traffic. To support this hypothesis a case study is presented focusing on a selected element of transportation system in operation.
Źródło:
Journal of Polish Safety and Reliability Association; 2012, 3, 2; 237--244
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model of navigational safety of vessels in Polish EEZ
Autorzy:
Przywarty, M.
Jarząbek, D.
Gucma, L.
Powiązania:
https://bibliotekanauki.pl/articles/320901.pdf
Data publikacji:
2014
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
navigational safety assessment
marine accidents
collision probability
fishing vessels
simulation model
Opis:
The paper presents the assumptions of a simulation model for assessing the navigational safety of fishing vessels. The model consist of submodels of merchant and fishing vessels traffic, submodel of external condition and submodel of accident consequences. Paper present also a results of simulation experiment which was carried out for Polish EEZ. Model takes into account all Polish fishing vessels operating in the Polish EEZ with length more than 15 meters and the merchant vessels traffic in South Baltic Sea area. As a results positions of simulated collisions of fishing and merchant vessels, positions and sizes of simulated bunker spills and the positions of losses of fishing equipment were achieved.
W artykule przedstawiono założenia złożonego modelu symulacyjnego dla szacowania bezpieczeństwa nawigacyjnego statków rybackich. Model składa się z modeli ruchu statków handlowych i statków rybackich, modelu warunków środowiskowych oraz modelu skutków zdarzenia. Ponadto w artykule przedstawiono rezultaty eksperymentu symulacyjnego przeprowadzonego dla polskiej wyłącznej strefy ekonomicznej. Model uwzględnia wszystkie polskie statki rybackie operujące w polskiej wyłącznej strefie ekonomicznej o długości większej niż piętnaście metrów oraz ruch statków handlowych na południowej części Morza Bałtyckiego. W rezultacie otrzymano pozycje prawdopodobnych kolizji statków transportowych oraz rybackich, pozycje i rozmiary prawdopodobnych rozlewów olejowych oraz pozycje utraty narzędzi połowowych.
Źródło:
Annual of Navigation; 2014, 21; 133-142
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Manoeuvring areas to adapt ACAS for the maritime domain
Autorzy:
Baldauf, M.
Mehdi, R.
Deeb, H.
Schröder-Hinrichs, J. U.
Benedict, K.
Krüger, C.
Fischer, S.
Gluch, M.
Powiązania:
https://bibliotekanauki.pl/articles/135052.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
situation-dependent analysis
risk assessment
risk of collision
collision probability
prediction of manoeuvring areas
potential areas of water
fast time simulation
Opis:
Rapidly increasing numbers of ships and ship sizes pose an ever-growing challenge to the maritime industry. Although statistics indicate improved levels of safety in the industry which carries 90% of the world’s trade, the risk of navigational accidents, among other issues, remains a prime concern and priority (EMSA, 2010; 2014). In order to address these concerns, the authors turned to another high-risk industry for inspiration. Specifically, they turned to the aviation industry, which has often been used as a source of comparisons and ideas by researchers in the maritime domain. Keeping up with the trend, the authors of this paper turn to a tried-and-tested system used widely in modern aviation: the Airborne Collision Avoidance System (ACAS). The prime idea behind ACAS is to construct two virtual 3D zones around an aircraft. These zones are dynamic, and depend on the manoeuvring characteristics of a given aircraft. If the system detects an “intruder” (another aircraft) in either of the two well-defined virtual zones, it provides warnings and/or instructions to pilots of both aircraft to take certain precautionary or emergency measures. In the current paper, the authors explore whether or not such a system is feasible for use in the maritime domain and, if so, how. The paper provides a detailed analysis of the potential benefits and drawbacks of using an ACAS-like system onboard vessels. It also discusses possible means of implementation and integration with current equipment, and explores how the introduction of e-navigation may impact the proposed solution.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 43 (115); 39-47
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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