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Uničov bypass - location study
Zeleňák, Matej ; Efenberk, Tomáš (referee) ; Radimský, Michal (advisor)
The subject of the bachelor thesis is a research study of the Uničov bypass. Uničov is located in the Olomouc region, between towns Mohelnice and Šternberk. The bypass is designed as an interconnection of the roads II/444 and II/446. Existing roads are led from west and north into the town center. The main goals of the study are to divert traffic outside of the town, to improve traffic flow and to increase safety in the city.
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Modification of asphalt mixtures
Zeleňák, Matej ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
This master’s thesis studies impact of direct-to-plant SBS polymer on properties of asphalt binder and asphalt mixture. It uses a new modification additive. The addition takes place directly during the mixing in the plant. This technology is not commonly used in Czech Republic. The theoretical part of this thesis describes current experiences with this method of modification. The procedures of laboratory tests needle penetration, softening point, elastic recovery, stiffness and low-temperature properties are described. The practical part presents values measured during preparation of test samples. Furthermore, it analyses the test results of the binders and mixtures in detail. The thesis concludes by evaluation of each test result and by summarization of the findings.
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Object Detection in the Laser Scans Using Convolutional Neural Networks
Zelenák, Michal ; Kodym, Oldřich (referee) ; Veľas, Martin (advisor)
This work is focused on road segmentation in laser scans, using a convolutional neural network. To achieve this goal, which will find application in the field of road maintenance, convolutional neural networks have been used for their flexibility and speed. The work brings implementation and modifications of the existing method, which solves the problem by using a fully connected convolutional neural network. Used modifications include, for example using of various parameters for the loss function, the use of a different number of classes in the network model and dataset. The effect of the modification was experimentally verified and the accuracy of 96.12%, and the value for F-measure 95.02% were achieved.
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Uničov bypass - location study
Zeleňák, Matej ; Efenberk, Tomáš (referee) ; Radimský, Michal (advisor)
The subject of the bachelor thesis is a research study of the Uničov bypass. Uničov is located in the Olomouc region, between towns Mohelnice and Šternberk. The bypass is designed as an interconnection of the roads II/444 and II/446. Existing roads are led from west and north into the town center. The main goals of the study are to divert traffic outside of the town, to improve traffic flow and to increase safety in the city.
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Object Detection in the Laser Scans Using Convolutional Neural Networks
Zelenák, Michal ; Kodym, Oldřich (referee) ; Veľas, Martin (advisor)
This work is focused on road segmentation in laser scans, using a convolutional neural network. To achieve this goal, which will find application in the field of road maintenance, convolutional neural networks have been used for their flexibility and speed. The work brings implementation and modifications of the existing method, which solves the problem by using a fully connected convolutional neural network. Used modifications include, for example using of various parameters for the loss function, the use of a different number of classes in the network model and dataset. The effect of the modification was experimentally verified and the accuracy of 96.12%, and the value for F-measure 95.02% were achieved.
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Velocity measurements on continuous micro water jet using fluorescent PMMA seeding particles
Zeleňák, Michal ; Ščučka, Jiří ; Souček, Kamil
The paper deals with application of optical diagnostic techniques for velocity\nmeasurements of continuous micro water jet. The combination of Particle image\nvelocimetry, Particle tracking velocimetry, Laser induced fluorescence and\nShadowgraphy methods have been applied together with the use of fluorescent\nPMMA seeding particles. An experimental closed water circuit was designed with\na low-pressure water pump, and a series of experiments was conducted to\nmeasure the velocity of seeding particles in the water jet flow below the diamond\nmicro-nozzle outlet. The basic principles of the methods used in experiments are\nalso described.
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