Fakulta elektrotechniky a informatiky / Faculty of Electrical Engineering and Informatics
Stálý URI pro tuto komunituhttps://hdl.handle.net/10195/3847
Práce obhájené před rokem 2008 jsou uloženy pouze v kolekci Vysokoškolské kvalifikační práce
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Konferenční objektpeer-reviewedpostprint Omezený přístup Improved fuzzy decision support system for human-realistic overtaking in railway traffic simulations(CAL-TEK SRL, 2023) Vyčítal, TomášIn a simulation model of a railway system it is a necessity, to have realistic train overtaking behavior during disturbances. Many simulation tools address this problem by using simple overtaking solutions, such as look ahead. These tend to be non-intuitive to configure and often not very human-realistic. The goal of this paper is to design a fuzzy system that can easily be used to simulate human-realistic overtaking behavior. A fuzzy system has been chosen because this approach is well-suited for human-style decision making. The presented fuzzy system considers timetables, train positions, delays, buffer times etc. as inputs and provides instructions to the simulation tool whether given train should or should not be overtaken. Finally the performance of the system is evaluated by a case study simulating a part of the railway system in the Czech Republic around the town of Pardubice.Konferenční objektpeer-reviewedpostprint Omezený přístup Fuzzy decision support system for human-realistic overtaking in railway traffic simulations(IEEE (Institute of Electrical and Electronics Engineers), 2023) Vyčítal, TomášIn a simulation model of a railway system it is important, besides other crucial algorithms, to have correct behaviour of train overtaking in stochastic conditions. This problem is being addressed in many simulation tools focused on railway traffic, however these are not very human-realistic. The goal of this paper is to create a more human-realistic overtaking decision support system for the use in railway traffic simulations. A fuzzy system has been chosen for this task as fuzzy systems are well-suited for human-like decision making. The fuzzy system designed takes into account timetables, train positions, delays and buffer times as inputs and provides an instruction to overtake or not overtake.Konferenční objektpeer-reviewedpostprint Otevřený přístup Missing tracks and switches – on the way to assess modernised stations in terms of their usefulness for railway traffic(Kaunas University of Technology, 2022) Bažant, Michael; Smoczyński, P; Gill, A; Bulíček, JosefRail transport plays an important role in the vision of the development of mobility in the European Union. This is reflected in modernisation projects that include not only railway lines, but also station layouts. Unfortunately, many examples in the Czech Republic and Poland show that the 'rationalization'of the number of tracks and switches often leads to situations in which the station is no longer useful for rail traffic that would be even slightly different from the assumed standard. Currently, a simulation model is being developed to assess the modernised stations in terms of their usefulness for rail traffic. This article presents the so far solved problems related to the aspect of time, as well as track prioritisation when accepting various types of trains. It also contains the currently tested version of developed algorithm, which allows simulating the operation of stations in random traffic conditions.Konferenční objektpeer-reviewedpostprint Omezený přístup Relationship between delay and the need for stations on single-track lines for train passing(Silesian University of Technology, 2022) Bažant, Michael; Bulíček, JosefThe paper is focused on single-track railway lines with low volume of operation under period timetable. The issue, where the stations allowing passing of trains should be located on such lines is solved. The research is conducted on 3 levels of analytic assessment; mesoscopic and macroscopic simulation modelling. Indicators extending possibilities how to assess railway operation in this case are proposed for each level – optimal location of passing place; difference from an optimal passing place; range of variation by position of passing places; number of utilizations of individual stations for passing. Even though simulation has particular nature, it is visible that ratio of delayed trains and mean value of train delay have an important role on the stability of operation. Stations allowing passing should be located close one to another in neighbourhood of an ideal passing place. Simple macroscopic model for periodic timetable operation is also presented as an illustration of context, in which research results should be applied.Konferenční objektpeer-reviewedpublished version Otevřený přístup Selection of railway line segments that allow occupation by more trains based on simulation(CAL-TEK SRL, 2020) Bulíček, Josef; Bažant, MichaelThe paper is focused on research of railway infrastructure capacity assessment by computer simulation method. Specific goal of this paper is to discuss tools and possibilities for assessment, which segments of railway line can be divided into spatial segments for improving of capacity. This division can be done by using line blocks or more advanced systems, so called moving blocks, like ETCS L3 or interlocking and control systems based on on-line location of trains and controlling the gap between trains. The presumption is that equipment of a line segment between stations with such system costs considerable funds. Proposed method in this paper can help how to identify which segments have priority to be equipped or not. Simulation and transport technology points of view are combined in the paper.Konferenční objektpeer-reviewedpostprint Omezený přístup Utilization of computer simulation for solution of flood-control resevoir protection function(Dime University of Genoa, 2019) Fikejz, Jan; Roušar, Ladislav; Zachoval, TomášThis article deals with the use of a computer simulation to solve the protective function of a flood-control reservoir as a support tool for flood wave transformation. Attention is primarily focused on the design and implementation of a simulation tool enabling to implement selected mathematical approach for numerical solution of the balance equation of inflow, outflow and retention of water in the reservoir. The designed software tool is then used for the selected experiment of transformation of theoretical flood wave by flood-control reservoir.Konferenční objektpeer-reviewedpostprint Omezený přístup Utilization of computer simulation for detection non-standard situations within single-track lines(Dime University of Genoa, 2019) Fikejz, Jan; Merta, JanThis article deals with the use of computer simulation for induction and detection of non-standard/crisis situations within single-track railways. First, attention is paid to the collection and evaluation of historical data, which are then used for the designed simulator. The article then focuses on the design of a simulation tool for inducing non-standard/crisis situations within a monitored segment of a railway network. Simulation tool is then used for selected experiments.Konferenční objektpeer-reviewedpostprint Omezený přístup Use reduced track profile and discrete simulation to calculate train travel time(Dime University of Genoa, 2018) Fikejz, Jan; Merta, JanThis article deals about utilization of reduced track profile for dynamic calculation of train travel time. Attention is firstly aimed on the description of the location of trains in the designed model of railway network. Further attention is aimed on the design of the dynamic calculation of train travel time. This calculation utilization of computer simulation and reduced track profile as a substitute of the real track profile of substitute gradients.Konferenční objektpeer-reviewedpostprint Omezený přístup Utilisation of computer simulation for dynamic calculation of train delays(EUROSIS-ETI, 2018) Fikejz, Jan; Brožek, JosefThis article deals about utilisation of computer simulation for dynamic calculation of train delays within the rail network model and satellite navigation. Attention is firstly aimed on the description of the trains position in the designed railway network model. Further attention is focused on the design of the dynamic calculation of train delays with utilization of reduced track profile and using computer simulation.Konferenční objektpeer-reviewedpostprint Otevřený přístup Computer game as a tool for machine learning education(IEEE (Institute of Electrical and Electronics Engineers), 2017) Doležel, Petr; Dvořák, MiroslavThe effective education is one of very important and everlasting challenges of human society. With each generation of students, new approaches have to be implemented to keep the process of education prosperous. This paper introduces a small piece to a set of modern tools for education of Informatics and Electrical Engineering. To be more specific, an interactive software for machine learning testing and demonstration is presented in this paper. The software is designed especially to be used as a motivation and a first encounter to these areas of technical studies, while it supports individual efforts of the students. In the paper, the software architecture is described and, in the second half of the paper, some possibilities of software usage in education process are suggested.