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Metrics and Criteria for Socio-Technical System Diagnostic
Raudenská, Lenka ; Dohnal, Mirko (referee) ; Nenadál, Jaroslav (referee) ; Fiala, Alois (advisor)
This doctoral thesis is focused on metrics and the criteria for socio-technical system diagnostics, which is a high profile topic for companies wanting to ensure the best in product quality. More and more customers are requiring suppliers to prove reliability in the production and supply quality of products according to given specifications. Consequently the ability to produce quality goods corresponding to customer requirements has become a fundamental condition in order to remain competitive. The thesis firstly lays out the basic strategies and rules which are prerequisite for a successful working company in order to ensure provision of quality goods at competitive costs. Next, methods and tools for planning are discussed. Planning is important in its impact on budget, time schedules, and necessary sourcing quantification. Risk analysis is also included to help define preventative actions, and reduce the probability of error and potential breakdown of the entire company. The next part of the thesis deals with optimisation problems, which are solved by Swarm based optimisation. Algorithms and their utilisation in industry are described, in particular the Vehicle routing problem and Travelling salesman problem, used as tools for solving specialist problems within manufacturing corporations. The final part of the thesis deals with Qualitative modelling, where solutions can be achieved with less exact quantitative information of the surveyed model. The text includes qualitative algebra descriptions, which discern only three possible values – positive, constant and negative, which are sufficient in the demonstration of trends. The results can also be conveniently represented using graph theory tools.
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Phase Changes on Heat Exchanger Surfaces with Hollow Fibers
Kůdelová, Tereza ; Horák, Aleš (referee) ; Dohnal, Mirko (referee) ; Raudenský, Miroslav (advisor)
The thesis focuses on the polymer hollow fibres heat exchangers. The main object of the research is the formation and process of condensation on the outer surface of fibres and the effect of phase change on the heat transfer. The study deals with the influence of the geometry of the heat exchnager on the heat transfer and the condensation process. Fatigue tests of polymeric hollow fibres exchangers are also part of the work. The work provides an overview of the possible use of such heat exchangers in industrial applications associated with condensation.
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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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Balanced Scorecard Implementation within Company Environment
Lojdová, Marie ; Bühn, František (referee) ; Dohnal, Mirko (advisor)
The master’s thesis deals with Balanced Scorecard implementation within a company environment. The object of the thesis is to increase the effectiveness of strategic management which can be achieved through proper implementation of the method. The theoretical section explains the basic concepts of strategic management, followed by the description of method BSC, its implementation and risks. The practical part is focused on creating a business strategy and the model BSC implementation in particular company. As an auxiliary tool for management decision making a fuzzy model was developed and then a dialogue is held with fuzzy expert system.
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Efficiency of selected chemical reactions on the membrane reactor
Liman, Martin ; Mirko,, Dohnal (referee) ; Svěrák, Tomáš (advisor)
This bachelor’s thesis focuses on the efficiency of reactions happening on the membrane reactor or also known as a contactor. The theoretical part contains basic insight into the theories needed to understand chemically physical phenomena on membrane contactors. Furthermore, the theoretical part serves as a recherche for modern membrane contactor technologies, including the examples of their usage. The practical part consists of a description of the membrane contactor that is used, the methodology of the measuring and the measured data output. Afterwards, the results are being talked over and developed further to the possible use in the current technologies.
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Optimization of Heat Transfer Surfaces of Heat Exchangers
Bartuli, Erik ; Dohnal, Mirko (referee) ; Vinogradov, Andrey Vladimirovich (referee) ; Raudenský, Miroslav (advisor)
Disertační práce je zaměřena na kovové a polymerní výměníky tepla. Hlavním předmětem zkoumání je optimalizace teplosměnných ploch za účelem zvýšení účinnosti výměníku tepla. Tyto cíle byly dosaženy experimentálně a numericky pomocí modelování v ANSYS. Na základě dosažených výsledků byla rozpracována technologie křížového navíjení polymerních výměníků z dutých vláken. Experimentální zařízení původně určené pro navíjení tlakových nádrží bylo modifikované pro automatizovanou výrobu polymerních výměníků z dutých vláken, ježto může být použita při jejich masové výrobě. Tato práce se také zabývala výměníky tepla pro klimatizační systémy. Byly zkoumány možnosti využití polymerních výměníků z dutých vláken v těchto systémech. Mimo jiné byla provedena studie vlivu cyklického tepelného zatížení standardního kovového žebrovaného tepelného výměníku.
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Vector Optimisation of a Company Based on Trend Evaluation
Přichystalová, Veronika ; Musil, Tomáš (referee) ; Dohnal, Mirko (advisor)
This thesis analyzes the impact of political risk for investment decision-ing-on invest-ments into large investment projects. The failure of investors in the field of large in-vestment projects is the vast majority caused by the politic-social grounds, whose quan-tification is extremely difficult. Political risk affects economic conditions and the stabil-ity of the environment, therefore knowledge of its development is essential for the prop-er investment decisions. His predictions are quantitative level problematic. The method used qualitative modeling falls within the field of artificial intelligence and used to model the trend. The work describes the process of creating qualitative model, its inter-pretation and recommendations for use in investment decisions.
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The Evaluation of the the Investment Project
Čech, Květoslav ; Dohnal, Mirko (referee) ; Luňáček, Jiří (advisor)
The aim of this diploma thesis is to evaluate the economic efficiency of investment based on particular investment project of solar power plant through various economics methods. The basic economics methods of investment efficiency, among these methods can be found static methods as well as dynamic ones that respect the time factor. Among the most important indicator evaluating investment efficiency belongs net present value, internal rate of return and pay-off period. Last but not least, the possible risks connected with the implementation of the investment and their impacts on total efficiency are identified and preventive precautions are recommended.
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Vector Optimalisation of a Company Based on Trend Evaluation
Tesařová, Lenka ; Válková, Hana (referee) ; Dohnal, Mirko (advisor)
The thesis deals with the analysis of the macroeconomic, market and intern environment of corporations in order to analyze the appropriate time to establish a new company or to invest into an existing economical subject. For this purpose the qualitative modeling was used. Thanks to this method there is a possibility to predict the future development of the factors that have an influence on rentability of companies. The choice of variables is the same as with the ones that are analyzed in the process of evaluation rating.
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