Simulátor dopravní sítě

Cílem projektu je simulovat pohyb vozidel v silnicích. Projekt obsahuje grafický simulátor a grafický editor dopravní sítě. Editor dopravní sítě umožňuje uživatelovi vytvořit a upravit sítě. S danou sítí se bude moct simulovat pohyb vozidel a získat výsledek simulace. Simulace se probíhá se vlastním simulačním modelem, který má dvě důležité modely - ovládací model pohybu vozidel a semaforu.The aim of the project is to simulate the movement of vehicles on the road. The project includes the graphical simulator and the graphical editor of the traffic road network. Editor traffic road network allows users to create and edit network. With the traffic road network will be able to simulate the movement of vehicles and obtain simulation results. The simulation is carried out with its own simulation model, which has two important models - control model of movement of vehicles and traffic lights.Department of Software EngineeringKatedra softwarového inženýrstvíFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult

Influence of geometric structure, convection, and eddy on sound propagation in acoustic metamaterial with turbulent flow

The problem of reducing noise in the transportation is an important research field to prevent accidents and to provide a civilized environment for people. A material that has recently attracted attention in research to reduce noise is acoustic metamaterial, and most of the research projects so far have been limited to the case of static media without flow. We have studied the sound transmission properties of acoustic metamaterial with turbulent flow to develop acoustic metamaterial that be used in transportation. In this paper, the effect of geometrical structure, the convective effect, and the eddy effect on sound propagation in acoustic metamaterial with turbulent flow are investigated, and the relationships between them are analyzed. The convective effect and the eddy effect both reduce the resonant strength of sound transmission loss resulting from the unique geometry of the acoustic crystal, but shift the resonant frequencies in opposite directions. In addition, when the convective effect and the eddy effect of the airflow, as well as the intrinsic interaction effect generated from the unique geometrical structure of the acoustic metamaterial cannot be ignored, they exhibit competition phenomena with each other, resulting in a widening of the resonance peak. As a result, these three effects cause the shift of the resonance frequency of the sound transmission loss and the widening of the resonance peak. The results of this study show that even in the case of turbulent flow, acoustic metamaterial can be used for transportation by properly controlling the geometric size and shape of the acoustic metamaterial.Comment: 19 pages, 17 figure

Simulation of traffic infrastructure

The aim of the project is to simulate the movement of vehicles on the road. The project includes the graphical simulator and the graphical editor of the traffic road network. Editor traffic road network allows users to create and edit network. With the traffic road network will be able to simulate the movement of vehicles and obtain simulation results. The simulation is carried out with its own simulation model, which has two important models - control model of movement of vehicles and traffic lights