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Tytuł:
Networks of queues for the simulation of urban flow systems: an intermodal traffic system
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1955697.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
traffic simulation
traffic engineering
queuing network simulation
Opis:
In this paper we introduce a queueing network model, which can be used to simulate the behaviour of specific traffic systems in an urban context. The frame of the work is that of road automation and traffic system control by queue based models simulation.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 1; 121-130
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling tools to integrate public transportation
Autorzy:
Solecka, K.
Powiązania:
https://bibliotekanauki.pl/articles/198134.pdf
Data publikacji:
2016
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
transport integration
modelling
traffic simulation
Opis:
One of the main problems within cities is the lack of convenient public transport connections, which offer passengers a comprehensive and efficient means of transportation from one place to another. Urban transport integration is intended to improve the functioning of public transport and, thus, is an activity that significantly contributes to the quality of transport services within cities. Transport integration may include solutions provided by urban public transport, as well as solutions based on the integration of public transport with individual transport modes. This article presents a comprehensive approach to the integration of urban transport. Exemplary tools integrating urban transport, along with examples of modelling in software for traffic microsimulation, are shown.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2016, 92; 129-139
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Traffic control algorithms in computer networks. Part 2, Simulation researches of the algorithms
Autorzy:
Barczak, A.
Sitkiewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/93004.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
traffic control algorithms
computer networks
traffic simulation in networks
Opis:
This article is the continuation of the first part entitled Review of algorithms. In the article presented were the author's simulator of a network and the tests performed with its help. In the first part the concept and functionality of the created simulator were described. The concept emerged on the basis of an analysis of existing solutions, as well as needs the created software has to fulfill. The second part of the article depicts the testing environment, i.e. network topology and simulation parameters used during the research. What is more, in the aforementioned part, provided was the comparison of the research run with the use of the author's software and its interpretation.
Źródło:
Studia Informatica : systems and information technology; 2009, 2(13); 5-19
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Procedure for Marine Traffic Simulation with AIS Data
Autorzy:
Miyake, R.
Fukuto, J.
Hasegawa, K.
Powiązania:
https://bibliotekanauki.pl/articles/117537.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
AIS Data
Marine Traffic
Marine Traffic Simulation
Collision Avoidance
Automatic Identification System (AIS)
safety at sea
Traffic Simulation
Navigation Environment
Opis:
It is essential to evaluate safety of marine traffic for the improvement of efficiency and safety of marine traffic. Spread of AIS makes observation of actual marine traffic more easily and faster than before. Besides, description of collision avoidance behaviours of ships are indispensable to simulate a realistic marine traffic. It is important to develop and implement an algorithm of collision avoidance corresponding to a target traffic or target area into the marine traffic simulation because actual actions for collision avoidance depend on circumstances where ships are sailing. The authors developed an automated marine traffic simulation system with AIS data. And in this paper, we proposed a series of systematic procedures for marine traffic simulation including analysing for collision avoidance behaviours using AIS data.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 1; 59-66
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Avoiding collisions, enhancing marine safety – a simplified model for the Aegean Sea
Autorzy:
Ventikos, N. P.
Rakas, D. K.
Powiązania:
https://bibliotekanauki.pl/articles/135454.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
marine safety
collision
modeling
maritime traffic
traffic simulation
Aegean Sea
Opis:
Ship collision is a hazardous event within the chain of maritime transport. Collisions may result in human losses, adverse economic consequences, and environmental damages causing significant impact to local societies and related activities. A major factor in any risk analysis concerning ship collisions is the probability of these collisions occurring. The purpose of this study is to assess the probability of ship-to-ship collision in the Aegean Sea. The basic concept of the developed model is to (statistically) simulate traffic flow in the area of interest and determine the collision candidates; this will be implemented in a pilot study in a segment of the Aegean Sea. The input of this effort is based on values that are extracted from statistical analysis of the international fleet in combination with the study of maps depicting traffic flow in the studied area. Hence, it does not employ detailed AIS data. The obtained results are presented and their agreement with actual incidents is discussed in depth. The paper concludes with interesting insights of the aforementioned tasks.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 42 (114); 78-85
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Issues on Simulation of the Railway Rolling Stock Operation Process – A System and Literature Review
Autorzy:
Czaja, Piotr
Restel, Franciszek J.
Powiązania:
https://bibliotekanauki.pl/articles/504453.pdf
Data publikacji:
2018
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
railway traffic simulation
railway rolling stock
traffic management
train crew management
Opis:
Railway traffic simulation, taking into account operation and maintenance conditions, is not a new issue in the literature. External effects in such networks (e.g. level crossings) were not taken into account in studies. The used models do not take into account sufficiently the process of degradation and recovery of the network. From the technical side, currently carried out simulations are made using similar approaches and techniques as in the initial stage of research. Well-established work in this area could be the basis for evaluation of new solutions. However, the progress in simulation tools during the last years, especially in performance and programming architecture, attempts to create a modern simulation tool. In the paper were presented the main assumptions for the evaluated event-based simulation method, with application to stiff-track transportation networks.
Źródło:
Logistics and Transport; 2018, 37, 1; 49-60
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kalibracja symulacji ruchu pojazdów na autostradzie
Calibration of traffic simulation on motorway
Autorzy:
Stawowy, M.
Chrobot, P.
Powiązania:
https://bibliotekanauki.pl/articles/375172.pdf
Data publikacji:
2007
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
autostrada
ruch pojazdów
symulacja ruchu
VisSim
motorway
vehicles traffic
traffic simulation
Vissim
Opis:
W artykule przedstawiono metodę kalibracji symulacji ruchu pojazdów na autostradzie za pomocą wzorca. Był nim inny, powszechnie uznany program symulacji ruchu pojazdów. Opisane zostały zasady działania kalibrowanego programu symulacji. Przed programami postawiono takie same wyselekcjonowane zadanie. Przedstawiono wyniki porównania obu programów, operujących na tych samych strumieniach zgłoszeń, na początku symulowanego odcinka autostrady.
In the paper introduced method of calibration of traffic simulation on motorway using exemplar. The exemplar was other, recognized universally simulation programme. Described rules of activity calibrated of simulation programme. Put such oneself, sorted, exercise for both programmes. Introduced results of comparison both programmes operating on same streams of notifications at the beginning simulated of motorway section.
Źródło:
Transport Problems; 2007, 2, 2; 25-32
1896-0596
2300-861X
Pojawia się w:
Transport Problems
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:
Synteza sprzętowa i programowa symulatora sterowania ruchem pojazdów na określonym obszarze
Hardware and software synthesis of a traffic control simulator for a specific area
Autorzy:
Małecki, K.
Jaszczak, S.
Sokołowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/156699.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
symulacja ruchu drogowego
sterowniki PLC
traffic simulation
programmable logic controller (PLC)
Opis:
W niniejszym artykule przedstawiono wieloelementowe, sprzętowo-programowe środowisko symulacyjne do sterowania ruchu drogowego. Główną ideą było wytworzenie łatwo rozbudowywalnego, elastycznego symulatora ruchu drogowego umożliwiającego prowadzenie badań z zakresu sterowania ruchem drogowym. Wykorzystano do tego specjalnie opracowane makiety obszarowe (różne rodzaje skrzyżowań dróg), sterowniki PLC oraz opracowano program komputerowy interpretujący dane pochodzące z makiet.
The multi-component, hardware and software simulation environment for traffic control is presented in this paper. The main idea was to create easy extendable, flexible simulation facility for research in the field of traffic control. A specially designed model area (different types of road junctions: a T-type intersection, crossing four roads classical and a typical junction, which is a model of a real system of roads in Szczecin), PLCs and a proprietary computer program that interprets data from the model were used for this purpose. The paper presents the concept of a hardware-software simulator (Fig. 1) together with a description of individual elements (Figs. 2, 3 and 5). It is worth mentioning that the way to develop a program and the layout and type of PLC allows the connection of any mock-ups that will provide the appropriate signals. These signals are interpreted and on the basis of them the so-called scenario will be generated. Finally, the paper presents a real situation that could occur at the T-type intersection (vehicle enters the intersection and cannot leave it). Due to the fact that the models are equipped with the so-called inductive loops, the system offers an appropriate scenario to avoid blocking the intersection. The paper can be concluded with a statement that the developed hardware-software simulator allows conducting research in the field of traffic control in a safe and collision-free way.
Źródło:
Pomiary Automatyka Kontrola; 2012, R. 58, nr 7, 7; 608-610
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vehicle emission computation through microscopic traffic simulation calibrated using genetic algorithm
Autorzy:
Wei, Yun
Yu, Ying
Xu, Lifeng
Huang, Wei
Guo, Jianhua
Wan, Ying
Cao, Jinde
Powiązania:
https://bibliotekanauki.pl/articles/91529.pdf
Data publikacji:
2019
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
environment protection
microscopic traffic simulation
genetic algorithm
IVE model
emission evaluation
Opis:
Vehicle emission calculation is critical for evaluating motor vehicle related environmental protection policies. Currently, many studies calculate vehicle emissions from integrating the microscopic traffic simulation model and the vehicle emission model. However, conventionally vehicle emission models are presented as a stand-alone software, requiring a laborious processing of the simulated second-by-second vehicle activity data. This is inefficient, in particular, when multiple runs of vehicle emission calculations are needed. Therefore, an integrated vehicle emission computation system is proposed around a microscopic traffic simulation model. In doing so, the relational database technique is used to store the simulated traffic activity data, and these data are used in emission computation through a built-in emission computation module developed based on the IVE model. In order to ensure the validity of the simulated vehicle activity data, the simulation model is calibrated using the genetic algorithm. The proposed system was implemented for a central urban region of Nanjing city. Hourly vehicle emissions of three types of vehicles were computed using the proposed system for the afternoon peak period, and the results were compared with those computed directly from the IVE software with a trivial difference in the results from the proposed system and the IVE software, indicating the validity of the proposed system. In addition, it was found for the study region that passenger cars are critical for controlling CO, buses are critical for controlling CO and VOC, and trucks are critical for controlling NOx and CO2. Future work is to test the proposed system in more traffic management and control strategies, and more vehicle emission models are to be incorporated in the system.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2019, 9, 1; 67-80
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
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