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Quantification of Enterprise Stability Based on Trend Models
Kovács, Roland ; Doubravský, Karel (referee) ; Dohnal, Mirko (advisor)
The thesis deals with the stability studies, economic models and with their qualitative solutions. Economic problems usually face information shortage and mathematical models are too sensitive to initial values, therefore solutions provided by conventional approaches can be applied only under specific and unrealistic conditions. Qualitative reasoning and qualitative approach bring however new methods but they are following only the trends. The work presents algorithms in order to find a stabilization cycles, thus providing an insight into the most probable behavior of economic systems. By using different case studies the thesis presented broad usability of qualitative approaches and suggests a way of quantifying the stability of different models. The programmed algorithms were created in MATLAB.
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Semiconductor nanowire growth modelling
Kovács, Roland ; Bartošík, Miroslav (referee) ; Kolíbal, Miroslav (advisor)
This bachelor’s thesis deals with modelling of semiconductor nanowires growth. The work describes the mechanism of growth using the VLS method. The main objective is to simulate the distribution of eutectic material in a droplet in the initial stage of growth. Mathematical models describing different situations of material diffusion in the droplet were depeloped. The simulation model is programmed in MATLAB.
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Controlling of Nanostructure Temperature by Light Absorption
Kovács, Roland ; Schmidt,, Eduard (referee) ; Kalousek, Radek (advisor)
The thesis deals with a new versatile strategy which is aimed to heat up rapidly the nanostructures with the help of a focused light beam utilizing localized plasmons (collective oscillation of electrons). By local heating, the growth of the semiconductor nanowires can be initiated and controlled at any arbitrarily prespecified location down to the single nanostructure level in a chamber at room-temperature. The aim of the work is to study electromagnetic field in the selected structures, especially in metal nanospheres by using numeric calculations and computations of the thermal field in the vicinity of these illuminated nanostructures. Electromagnetic phenomena is simulated in Lumerical and the temperature field in COMSOL.
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Quantification of Enterprise Stability Based on Trend Models
Kovács, Roland ; Doubravský, Karel (referee) ; Dohnal, Mirko (advisor)
The thesis deals with the stability studies, economic models and with their qualitative solutions. Economic problems usually face information shortage and mathematical models are too sensitive to initial values, therefore solutions provided by conventional approaches can be applied only under specific and unrealistic conditions. Qualitative reasoning and qualitative approach bring however new methods but they are following only the trends. The work presents algorithms in order to find a stabilization cycles, thus providing an insight into the most probable behavior of economic systems. By using different case studies the thesis presented broad usability of qualitative approaches and suggests a way of quantifying the stability of different models. The programmed algorithms were created in MATLAB.
|
|
|
Controlling of Nanostructure Temperature by Light Absorption
Kovács, Roland ; Schmidt,, Eduard (referee) ; Kalousek, Radek (advisor)
The thesis deals with a new versatile strategy which is aimed to heat up rapidly the nanostructures with the help of a focused light beam utilizing localized plasmons (collective oscillation of electrons). By local heating, the growth of the semiconductor nanowires can be initiated and controlled at any arbitrarily prespecified location down to the single nanostructure level in a chamber at room-temperature. The aim of the work is to study electromagnetic field in the selected structures, especially in metal nanospheres by using numeric calculations and computations of the thermal field in the vicinity of these illuminated nanostructures. Electromagnetic phenomena is simulated in Lumerical and the temperature field in COMSOL.
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|
|
Semiconductor nanowire growth modelling
Kovács, Roland ; Bartošík, Miroslav (referee) ; Kolíbal, Miroslav (advisor)
This bachelor’s thesis deals with modelling of semiconductor nanowires growth. The work describes the mechanism of growth using the VLS method. The main objective is to simulate the distribution of eutectic material in a droplet in the initial stage of growth. Mathematical models describing different situations of material diffusion in the droplet were depeloped. The simulation model is programmed in MATLAB.
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