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Overview of important polymers for technical practice
VAŠEK, Lukáš
Bachelor thesis focus mainly for a creating a graphical Educational sheet with a teaching subject like "materials and technology" or for a study on lower school levels. The Educational sheets are providing 15 of the most common used polymers along with their properties that the data can be immediately used by other students. The benefit and the goal are to prepare a basic brochure elementary property of the most widely used polymers with which it is possible to study the encounter.
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Thermal degradation of insulation materials from the cable industry
Kučera, Filip ; Krbal, Michal (referee) ; Pelikán, Luděk (advisor)
The aim of this bachelor thesis is to get acquainted with the properties and parameters of insulation materials of various types (PVC, PE). Measure these properties with a Tettex 2830/2831. Perform a theoretical analysis of the aging of insulating materials and propose a procedure for the formation of thermal degradation. Finally, find out how the properties of insulating materials, electrical strength and mechanical properties change due to thermal degradation.
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Multiple Instance Learning Framework Used For Ecg Premature Contraction Localization
Novotna, Petra
We propose the model combining convolutional neural network with multiple instancelearning in order to localize the premature atrial contraction and premature ventricular contraction.The model is based on ResNet architecture modified for 1D signal processing. Model was trainedon China Physiological Signal Challenge 2018 database extended by manually labeled ground truthpositions of premature complexes. The presented method did not reach satisfying results in PAClocalization (with dice = 0.127 for avg-pooling implementation). On the other hand, results of localizationof PVCs were comparable with other published studies (with dice = 0.952 for avg-poolingimplementation).
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Detection of premature ventricular contractions in ECG
Kantor, Marek ; Ronzhina, Marina (referee) ; Novotná, Petra (advisor)
This thesis focusses on the detection methods of extrasystoles from ECG and description of electrocardiogram, cardiac conduction system, extrasystoles and ventricular tachycardia. Extrasystoles are premature ventricular contraction caused by ectopic heartbeats. Classification is based on signal preprocessing, detection of R peak, the heartbeat segmentation, the feature description methods, normalization of features and the learning algorithms used. Selected and realized methods achieved classification accuracy ACC = 98 %, sensitivity SE = 100 % and specificity SP = 96,1 %. Gained features are also used for detection bundle branch block.
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New directions for waterproofing of underground transport
Čech, Tomáš ; Čížek, Luboš (referee) ; Šťastník, Stanislav (advisor)
This diploma thesis focuses on the implementation of waterproofing of underground constructions using an LLDPE membrane hinged on anchors. In the future, this method will replace the commonly used waterproofing system in Scandinavia with extruded polyethylene foam. This method of tunnel construction and waterproofing is compared with the NRTM method, often used in Central Europe. The thesis describes the installation of a waterproofing system, especially materials, accessories, welding devices and auxiliary installation equipment. The main focus of the thesis is to verify the reliability of the individual types of welds and to assess the waterproofing system in terms of implementation and environmental demands.
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Measurement of HV equipments by electronic bridge.
Kumičák, Ivan ; Pelikán, Luděk (referee) ; Krbal, Michal (advisor)
The main idea of this thesis is measurements of dielectric materials by using a device Tettex. The thesis is about basic physic properties of dielectric materials. The determination of a dielectric material is considered. The behavior of these materials in electrical fields and reasons, those can have an influence on it, are considered as well. In the text are described measuring methods of chosen parameters of dielectric materials by device Tettex and its functional principles. There are an evaluation of measurements, which were done, and a discussion about achieved results.
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Usable properties of plastic and aluminium windows installed in the building
Gabriel, Jindřich ; Skříček, Darek (referee) ; Šťastník, Stanislav (advisor)
The bachelor thesis deals with the thermal insulation of individual parts of doors and windows made of aluminium and plastic profiles. At the same time, the manufacturing processes for the production of these openings of the building structures are described. In addition, the requirements for placing the product on the market and the assessment of utility properties according to the currently valid standards are summarized. Contemporary profiles, insulating glass, spacing frames, window and door fittings and thermal treatments are also described. The practical part of the bachelor thesis is devoted to the determination of the temperature distribution, the temperature gradient and the distribution of the heat flows on the selected window type for four different ways of incorporation into the building structure. In conclusion, all the findings are summarized and a discussion about the achieved results is made.
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New directions for waterproofing of underground transport
Čech, Tomáš ; Vaněrek, Jan (referee) ; Šťastník, Stanislav (advisor)
This diploma thesis focuses on the implementation of waterproofing of underground constructions using an LLDPE membrane hinged on anchors. In the future, this method will replace the commonly used waterproofing system in Scandinavia with extruded polyethylene foam. This method of tunnel construction and waterproofing is compared with the NRTM method, often used in Central Europe. The thesis describes the installation of a waterproofing system, especially materials, accessories, welding devices and auxiliary installation equipment. The main focus of the thesis is to verify the reliability of the individual types of welds and to assess the waterproofing system in terms of implementation and environmental demands.
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Analysis of the life service of PVC roofing foils
Rosecký, Pavel ; Žák,, Antonín (referee) ; Žižková, Nikol (advisor)
Roofing foils are known for several years as building material for roof hydro insulation but their life service is not yet fully known. This thesis is focused on problematics of life service of roofing foils. In theoretical part there is discribed structure of foils and impacts which assist degradation processes. Practical part modifies the methodology artificial aging which is simulated in QUV tester and Q-SUN XE3 tester lumber-rooms. The thesis is trying reach with the results to natural aging as close as possible. The testing captures attributes which are more prone to degradation.
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Kindergarten
Marek, Tomáš ; Donaťák, Vladislav (referee) ; Donaťáková, Dagmar (advisor)
The subject of the diploma thesis is the elaboration of project documentation for the implementation of the new civic amenities of the Nursery School in the cadastral area of Plácky in the territory of the town of Hradec Králové. The building is designed as a stand alone divided into 4 segments with two above-ground floors. Kindergarten consists of 3 separate departments with a total capacity of 60 children and 1 unit for hobbies with a capacity of 20 children and their facilities. The object is based on the base passages. All brick structures are made of brick blocks Porotherm and the heat insulation is added to the perimeter shell. The internal staircase is monolithic, reinforced concrete and external prefabricated steel. The object is roofed with a flat roof and the support element consists of reinforced concrete pre-prestressed panels SPIROLL. Drawing part is processed in ArchiCAD program, visualizations are processed in Lumion program.
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