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Content available Learning a fuzzy model for evacuation speed estimation using fuzzy decision trees and evolutionary methods
Kello P., Gregor M., Miklóšik I., Spalek J.
Zeszyty Naukowe Wyższej Szkoły Technicznej w Katowicach
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2017
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nr 9
50--62
EN
The paper deals with evacuation time estimation using a fuzzy meta-model inferred from data using a combination of fuzzy decision trees (to construct the rule base) and evolutionary tuning (to optimize the membership functions). It uses real data – collected from existing literature. The paper first covers some basic facts concerning evacuation in road tunnels and its simulation. It then proceeds to discuss evolutionary tuning of fuzzy systems and fuzzy decision trees and describes the proposed approach. It shows that this approach improves upon previous results achieved using a purely evolutionary approach.
PL
Artykuł zajmuje się oszacowaniem czasu ewakuacji przy użyciu rozmytego meta-modelu wyprowadzonego z danych używając kombinacji rozmytych drzew decyzyjnych (aby konstruować podstawę reguły) oraz ewolucyjnego dostrajania (aby zoptymalizować funkcje przynależności). Wykorzystuje on dane rzeczywiste - zgromadzone z istniejącej literatury. Artykuł omawia najpierw pewne podstawowe fakty dotyczące ewakuacji tuneli drogowych i jej symulacji. Następnie przechodzi do omówienia ewolucyjnego dostrajania systemów rozmytych i rozmytych drzew decyzyjnych oraz opisuje proponowany sposób podejścia. Pokazuje, że to podejście poprawia wcześniejsze wyniki osiągnięte przy użyciu podejścia czysto ewolucyjnego.
2
Content available Cellular automaton traffic flow model with vehicle type and number of persons
Miklóšik I., Spalek J., Hruboš M., Přibyl P.
Archives of Transport System Telematics
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2015
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Vol. 8, iss. 1
14--18
EN
The paper deals with microscopic modeling of the traffic flow using cellular automaton in the Tunnel Simulator based on PLC. Model with lane changing logic is implemented in the SCADA visualization screen of the tunnel with unidirectional two-lane traffic. Tunnel Simulator is able to simulate unexpected events in the road tunnel such as fire, so vehicle type is also included in the traffic model to specify the heat release rate of the fire for car, van, bus and truck fi re scenario. Number of persons in the vehicles and location of the persons in the tunnel are planned to be used as the input for the model for evacuation time estimation.
3
Content available Comparison of different approaches to predict air pollution inside the tunnel tube
Hrbček J., Šimák V., Spalek J., Nemec D.
Archives of Transport System Telematics
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2013
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Vol. 6, iss. 4
9--13
EN
This paper deals with models of air pollution inside a tunnel tube. Various gases are emitted by combustion engines. They consist largely of oxides of nitrogen, carbon monoxide, steam and particles (opacity). Since each tunnel is unique, the design of the model must be realized for the particular road tunnel. Data measured in the control center of the tunnel is used to create various models and to realize them in the program environment MATLAB. It is possible to describe this system by description of the equations of physical dependences. These physical dependencies are between the speeds, piston effect, traffic density, quantity produced pollution, etc. Next we plan to show how fuzzy sets can be used to represent a real system. Finally, we are going to describe this system by the parametric model. For the purpose of parametric identification it is interesting to describe the sought process using input-output relations. The general procedure for estimation of the process model consists of several steps: determination of the model structure, estimation of parameters and verification of the model.
4
Content available Model of people evacuation from a road tunnel
Matis P., Spalek J.
Archives of Transport System Telematics
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2012
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Vol. 5, iss. 2
20-25
EN
This paper deals with the evacuation from a road tunnel. We have focused on the possibilities of using technological equipment for evacuation of people. The first part deals with the definition of the evacuation issue. The evacuation of people comes when an accident is found. It consists of informing people in a tunnel and providing possibilities for evacuation. At this moment, the technological equipment of road tunnel plays an important role. Using it, we can reduce the time needed to people in the tunnel to start their evacuation. The next part aims at presenting a mathematical tool, which is used to calculate the evacuation time. This will be employed to create a model of evacuation. The conclusion contains a design of the evacuation model. We compare two types of models. The first is called a hydraulic model, which is a form of the current model. This model is a mathematical expression of the behaviour of people. The second type of model is called an individual model. It is a microscopic model, which takes into account an individual human behaviour. This model will be used to create and display the simulation of the evacuation. Models will provide a quantitative numerical output and a graphical output in the form of graphs.
5
Content available Adaptive switching of mutation rate for genetic algorithms and genetic programming
Spalek J., Gregor M.
Applied Computer Science
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2011
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Vol. 7, no. 1
30-37
EN
The paper concerns the application of Genetic Algorithms and Genetic Programming to complex tasks such as automated design of control systems, where the space of solutions is non-trivial and may contain discontinuities. An adaptive value-switching mechanism for mutation rate control is proposed. It is shown that the proposed mechanism is useful in preventing the search from getting trapped in local extremes of the fitness landscape.
6
Content available Adaptive approaches to parameter control in genetic algorithms and genetic programming
Spalek J., Gregor M.
Applied Computer Science
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2011
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Vol. 7, no. 1
38--56
EN
The paper concerns the application of Genetic Algorithms and Genetic Programming to complex tasks such as automated design of control systems, where the space of solutions is non-trivial and may contain discontinuities. Several adaptive mechanisms for control of the search algorithm's parameters are proposed, investigated and compared to each other. It is shown that the proposed mechanisms are useful in preventing the search from getting trapped in local extremes of the fitness landscape.
7
Content available Development trends and risks of railroad crossings
Janota A., Spalek J., Sebenova J.
Archives of Transport System Telematics
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2009
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Vol. 2, iss. 4
37-40
EN
The application of new technologies on railroad crossings goes along with many questions, which answering should forego the implementation itself. The paper presents basic problems of crossings and the classification of generic railroad crossings according to the European Railway Agency. Therefore the goal of this paper is to present the current state and prospects in the field of railroad crossings in the light of the present-day situation, whereby the major attention is aimed at two fields – new technologies and overview of risk analysis methods applied worldwide on railroad crossings.
8
Content available Road tunnels safety according to european legislation
Stefanak J., Spalek J., Kallay F.
Transport Problems
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2008
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T. 3, z. 4
65-70
EN
The article deals with safety of European road tunnels in accordance with actual European legislation. Standards and recommendations of European Commission, PIARC and other professional bodies of the European Union define minimal techno logical requirements for equipment and operation of the tunnels in scope of Trans-European Road Network.
PL
Artykuł zajmuje się bezpieczeństwem europejskich tuneli drogowych zgodnie z aktualnie obowiązującym prawem europejskim. Standardy i rekomendacje Komisji Europejskiej, PIARC i innych ważnych organów Unii Europejskiej określają minimalne wymagania technologiczne w zakresie wyposażenia i eksploatacji tuneli w ramach europejskiej sieci drogowej.
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