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Experimental apparatuses for studying rolling contact fatigue life
Popelka, Ondřej ; Nevrlý, Josef (referee) ; Šamánek, Otakar (advisor)
The bachelor thesis consist the overview of experimental fatigue apparatuses that are designated for the lifecycle fatigue study of machine parts. It describes two basic devices, discs machines and rolling element machines. The specific of these devices is their use for study of fatigue damage resistance of machinery materials. Their disadvantage is non-complexity and limited possibility of usage. They are designed for basic tribological research (e.g. point contact, line contact, etc.). Complex experimental fatigue apparatuses are often expensive so they can’t be used in regular study.
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Fluidized bed boiler for burning coal and wood 150t/h
Popelka, Ondřej ; Lisý, Martin (referee) ; Skála, Zdeněk (advisor)
This thesis is focused in calculation and designing of fluid bed boiler for burning coal and wood biomass in the form of wood chips. The uniqueness of fluidized bed boiler is circulating fluidized layer and cyclone ash separator from flue gases beyond the combustion chamber.Work was divided into several parts due to different parameters of the fuel.. Stoichiometry calculations, emissions calculations, enthalpy of combustion and flue gas desulphurization calculations are performed in various parts.Further, calculating of the losses of boiler and its efficiency comparing to the calculation and design of each heat transfer surfaces was also solved so that resulting size and quantity meet the required specifications.Drawn set of this designed boiler based on calculations is included in the annex to this paper.
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Fluidized bed boiler for burning coal and wood 150t/h
Popelka, Ondřej ; Lisý, Martin (referee) ; Skála, Zdeněk (advisor)
This thesis is focused in calculation and designing of fluid bed boiler for burning coal and wood biomass in the form of wood chips. The uniqueness of fluidized bed boiler is circulating fluidized layer and cyclone ash separator from flue gases beyond the combustion chamber.Work was divided into several parts due to different parameters of the fuel.. Stoichiometry calculations, emissions calculations, enthalpy of combustion and flue gas desulphurization calculations are performed in various parts.Further, calculating of the losses of boiler and its efficiency comparing to the calculation and design of each heat transfer surfaces was also solved so that resulting size and quantity meet the required specifications.Drawn set of this designed boiler based on calculations is included in the annex to this paper.
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Fluidized bed boiler for burning coal and wood 150t/h
Popelka, Ondřej ; Lisý, Martin (referee) ; Skála, Zdeněk (advisor)
This thesis is focused in calculation and designing of fluid bed boiler for burning coal and wood biomass in the form of wood chips. The uniqueness of fluidized bed boiler is circulating fluidized layer and cyclone ash separator from flue gases beyond the combustion chamber.Work was divided into several parts due to different parameters of the fuel.. Stoichiometry calculations, emissions calculations, enthalpy of combustion and flue gas desulphurization calculations are performed in various parts.Further, calculating of the losses of boiler and its efficiency comparing to the calculation and design of each heat transfer surfaces was also solved so that resulting size and quantity meet the required specifications.Drawn set of this designed boiler based on calculations is included in the annex to this paper.
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Current Situation on Customer Relationship Management Systems market: Analysis and Potential of CRM Systems for tradesmen in the Czech Republic
Popelka, Ondřej ; Přibil, Jiří (advisor) ; Zelená, Veronika (referee)
This diploma thesis deals with the problematics of Customer Relationship Management systems in the context of their usage by tradesmen. It is divided into two main parts, the first of which aims to introduce readers into the problematics of CRM and SCRM systems and their benefits for tradesmen, describe the evolution of these systems with the arrival of the Web 2.0 interface and the environment where teese systems can operate. In the second part I analyzed the results of the questionnaire for tradesmen, which was aimed at mapping their opinion on these products, their willingness to invest in them and finding out about the benefits of individual functions of CRM systems. Following the results of the questionnaire, I defined a suitable solution for tradesmen and applied to the pre-selection for the most suitable products in this segment. Thanks to the preferences of the respondents and the evaluation of the required functionalities, the most suitable solution was found for representing the tradesmen in the Czech Republic.
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Použití evolučních a genetických algoritmů v ekonomických aplikacích
Popelka, Ondřej
This thesis describes new evolutionary artificial intelligence methods suitable for solving complex tasks. These include planning, optimization, decision, prediction and other problems. All of these are tasks which an intelligent human being can quickly learn to solve, yet they cannot be solved by machines in reasonable time. For this type of problems usually no analytical method or algorithm exists. These challenges represent the domain for artificial intelligence. This work concentrates on evolutionary methods of artificial intelligence based on genetic algorithms. Specifically grammatical evolution and differnetial evolution are described. The first part of this thesis describes the principles of genetic algorithms especially those used in grammatical evolution. Later the grammatical evolution method is described. Grammatical evolution is a genetic algorithm extended with a context-free grammar processor. This enables it to generate structured strings in an arbitrary language defined by a regular or context-free grammar. Second part of this work focuses on description of a generic computational system, which enables user-friendly control of grammatical evolution. The architecture of the system is thoroughly described. It composes of a computation service, database server and completely separated user interface. Also the problems solved using this system are described. These include symbolic regression, classification and generation of combinatorial logic circuits. All of these tasks were solved using the described implementation.
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Fluidized bed boiler for burning coal and wood 150t/h
Popelka, Ondřej ; Lisý, Martin (referee) ; Skála, Zdeněk (advisor)
This thesis is focused in calculation and designing of fluid bed boiler for burning coal and wood biomass in the form of wood chips. The uniqueness of fluidized bed boiler is circulating fluidized layer and cyclone ash separator from flue gases beyond the combustion chamber.Work was divided into several parts due to different parameters of the fuel.. Stoichiometry calculations, emissions calculations, enthalpy of combustion and flue gas desulphurization calculations are performed in various parts.Further, calculating of the losses of boiler and its efficiency comparing to the calculation and design of each heat transfer surfaces was also solved so that resulting size and quantity meet the required specifications.Drawn set of this designed boiler based on calculations is included in the annex to this paper.
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Experimental apparatuses for studying rolling contact fatigue life
Popelka, Ondřej ; Nevrlý, Josef (referee) ; Šamánek, Otakar (advisor)
The bachelor thesis consist the overview of experimental fatigue apparatuses that are designated for the lifecycle fatigue study of machine parts. It describes two basic devices, discs machines and rolling element machines. The specific of these devices is their use for study of fatigue damage resistance of machinery materials. Their disadvantage is non-complexity and limited possibility of usage. They are designed for basic tribological research (e.g. point contact, line contact, etc.). Complex experimental fatigue apparatuses are often expensive so they can’t be used in regular study.
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