Impact of Calibration Matrices on 3D Monocular Object Detection: Filtering, Dataset Combination and Integration of Synthetic Data
2024 - Keywords: 3D detekce monokulárních objektů 3; kombinace datasetů; počítačové vidění; kalibrační matice fotoaparátu; ohnisková vzdálenost; filtrování datasetu; normalizace datové sady Available in the ZČU Library. Impact of Calibration Matrices on 3D Monocular Object Detection: Filtering, Dataset Combination and Integration of Synthetic Data

Západočeská univerzita v Plzni, 2024

LatEd: A Geometric Latent Vector Editor
2024 - Keywords: neuronové sítě; GAN; signed distance fields Available in the ZČU Library. LatEd: A Geometric Latent Vector Editor

Západočeská univerzita v Plzni, 2024

Correlational Data Visualizations with Colored Bar Charts
2024 - Keywords: vizualizace korelačních dat; barevné pruhové grafy; text; ikony; skládané ikony Available in the ZČU Library. Correlational Data Visualizations with Colored Bar Charts

Západočeská univerzita v Plzni, 2024

Functional Tungsten-based thin films and their characterization
Košelová, Zuzana; Horáková, L.; Sobola, Dinara; Burda, Daniel; Knápek, Alexandr; Fohlerová, Z.
2024 - English Anodizing is a technique by which thin oxide layers can be formed on a surface. Thin oxide layers have been found to be useful in a variety of applications, including emitters of electrons. Tungsten is still a common choice for cold field emitters in commercial microscopy applications. Its suitable quality can be further improved by thin film deposition. Not only the emission characteristic can be improved, but also the emitter operating time can be extended. Tungsten oxide is known for its excellent resistance to corrosion and chemical attack due to its stable crystal structure and strong chemical bonds between tungsten and oxygen atoms. Many techniques with different advantages and disadvantages have been used for this purpose. Anodization was chosen for this work because of the controllable uniform coverage of the material and its easy availability without the need for expensive complex equipment. The anodizing process involves applying an electrical potential to tungsten while it is immersed in an electrolyte solution. This creates a thin layer of tungsten oxide on the surface of the metal. The thickness and properties of the resulting oxide layer can be controlled by adjusting the anodization conditions, such as the electrolyte solution, voltage, and the duration of the process. In this work, H3PO4 was used as the electrolyte to test whether these tungsten oxide layers would be useful for electron emitters, for use in electron guns and other devices that require high-quality electron emitters. The properties were evaluated using appropriate techniques. In general, anodization of tungsten to form thin layers of tungsten oxide layers is a promising technique for producing high quality electron emitters. Keywords: cold-field emission; thin layer deposition; tungsten oxide; resonance enhanced tunneling; anodization Available at various institutes of the ASCR Functional Tungsten-based thin films and their characterization

Anodizing is a technique by which thin oxide layers can be formed on a surface. Thin oxide layers have been found to be useful in a variety of applications, including emitters of electrons. Tungsten ...

Košelová, Zuzana; Horáková, L.; Sobola, Dinara; Burda, Daniel; Knápek, Alexandr; Fohlerová, Z.
Ústav přístrojové techniky, 2024

Vizualizace proudění tekutin pomocí termokamery
2024 - Tento příspěvek pojednává o vizualizaci proudění kapalin v různých podmínkách při rotaci, proudění přes překážky, ale i vzniku proudění zahříváním tekutiny. Keywords: proudění kapalin; vizualizace; zahřívání Available in the ZČU Library. Vizualizace proudění tekutin pomocí termokamery

Tento příspěvek pojednává o vizualizaci proudění kapalin v různých podmínkách při rotaci, proudění přes překážky, ale i vzniku proudění zahříváním tekutiny.

Západočeská univerzita v Plzni, 2024

Ledové království
2024 - „Ledové království“ obsahuje náměty na experimenty a badatelské aktivity pro žáky 2. stupně ZŠ a pro dětské vědecké kroužky. Veškeré experimenty a badatelské aktivity mají dvě společné pomůcky – termokameru a led. Keywords: experiment; 2. stupeň ŽŠ; termokamera; led Available in the ZČU Library. Ledové království

„Ledové království“ obsahuje náměty na experimenty a badatelské aktivity pro žáky 2. stupně ZŠ a pro dětské vědecké kroužky. Veškeré experimenty a badatelské aktivity mají dvě společné pomůcky – ...

Západočeská univerzita v Plzni, 2024

Brno lingvistické
Vykypěl, Bohumil
2024 - Czech Keywords: Moravia; personality; linguistics Available at various institutes of the ASCR Brno lingvistické

Vykypěl, Bohumil
Ústav pro jazyk český, 2024

František Martin Pelcel jako etymolog: výklady českých názvů měsíců v Pelcelově mluvnici
Vykypělová, Taťána
2024 - Czech Keywords: etymology Available at various institutes of the ASCR František Martin Pelcel jako etymolog: výklady českých názvů měsíců v Pelcelově mluvnici

Vykypělová, Taťána
Ústav pro jazyk český, 2024

Flow simulations approach for flocculation tanks
Idžakovičová, Kristýna; Bílek, Vojtěch; Haidl, Jan; Isoz, M.; Pivokonský, Martin
2024 - English Flocculation in water treatment facilities plays a key role in the separation of colloidal inorganic and organic substances. Its optimization leads to a significant increase in its efficiency and savings of operational costs. However, it is currently based on trial-and-error experimental approaches. In this contribution, we focus on flow modeling in stirred flocculation tanks that would, after coupling with a calibrated model of particle aggregation, enable simulationbased flocculation optimization. Despite the abundance of literature on stirred tank modeling, there is no universal agreement on the methodology used to describe turbulence nor on the approach to the computational mesh creation. Consequently, there is no unified methodology for simulations and their validation. To address this, we present a best-practice methodology for economical, yet reliable flow simulations in the said device. This methodology includes the choice of the turbulence model, the approach to the design of a high quality mesh suitable for arbitrary geometries, and results evaluation. It is developed based on an extensive literature review, a multitude of flow simulations using several meshes of progressively higher quality and resolution, and various strategies to converge to steady-state flow conditions. The simulation quality indicators used here involve comparison with the experimental data on fluid velocity, stirrer power output, and flow rate through the impeller zone. Additionally, the resulting flow simulation models are compared using tracer transport simulations, hinting at their potential for coupling with particle aggregation models. Keywords: flocculation tank; stirring; MRF; CFD; OpenFOAM Available in digital repository of the ASCR Flow simulations approach for flocculation tanks

Flocculation in water treatment facilities plays a key role in the separation of colloidal inorganic and organic substances. Its optimization leads to a significant increase in its efficiency and ...

Idžakovičová, Kristýna; Bílek, Vojtěch; Haidl, Jan; Isoz, M.; Pivokonský, Martin
Ústav pro hydrodynamiku, 2024

EFFECT OF STEEL COMPOSITION ON ITS BEHAVIOUR IN THE LIQUID LEAD ENVIRONMENT
Pazderova, M.; Hojná, A.; Vít, J.; Hadraba, Hynek; Čižek, J.
2024 - English Ferritic-martensitic Eurofer-97 and oxide dispersion strengthened (ODS) Eurofer steels are potential candidates for structural applications in advanced nuclear reactors. Influence of scandium, yttrium, and aluminum addition was studied at 600 degrees C using 10-6 wt.% oxygen concentration. Microstructure and corrosion behaviour was evaluated after 500 h and 1000 h of exposure to liquid lead. Microscopical investigation identified oxidation, solution- based attack, and Pb penetration into the material. Addition of scandium and aluminum changed the mechanism of corrosion attack. Eurofer-97 was partially protected by outer oxide and inner oxidation and Pb penetration was found. In contrast ODS-Eurofer steels after 1000 h of exposure showed mainly inner oxidation and SBA including Pb penetration into the steel. The inner oxidation consisted of Pb+Cr-O and Cr-O+Al-O layers mixture. Degradation of ODS steel was significantly lower than Eurofer-97. It seems that the inner oxidation layer beneath the surface did not prevent the Pb penetration but protected the surface from dissolution. Keywords: corrosion behavior; flowing lead; ods steels; pb; Ferritic-martensitic steel; ods; liquid Pb; oxidation; nuclear application Available at various institutes of the ASCR EFFECT OF STEEL COMPOSITION ON ITS BEHAVIOUR IN THE LIQUID LEAD ENVIRONMENT

Ferritic-martensitic Eurofer-97 and oxide dispersion strengthened (ODS) Eurofer steels are potential candidates for structural applications in advanced nuclear reactors. Influence of scandium, ...

Pazderova, M.; Hojná, A.; Vít, J.; Hadraba, Hynek; Čižek, J.
Ústav fyziky materiálů, 2024