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Dynamic analysis of railway bridge
Mojrová, Martina ; Vlk, Zbyněk (referee) ; Nevařil, Aleš (advisor)
The content of work is to determine modal characteristics of bridge construction over the Dyje river near Břeclav. That is done in ANSYS software and AxisVM software. These characteristics are compared with results from dynamic loading test and they are compared between themselves. In thesis is also an assessment of response to static traffic loads because of decision about dynamic analysis necessity. Then there is a simulation of dynamic traffic loads and results of this simulation are compared with results of dynamic analysis which was done by the project. The aim is to do a few static and dynamic tasks and compare results with the real dynamic test and with calculated results and to determinate the effect on certain variables.
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Risk Analysis using Crystal Ball
Krátká, Kateřina ; Jablonský, Josef (advisor) ; Kuncová, Martina (referee)
The thesis is focused on risk and uncertainty in decision theory. It introduces principles of choosing the best alternative in case of uncertainty and risk, as well as different ways how to quantify and manage the risk, therefore the risk management. The thesis also discusses simulation, definition of random numbers and generating of these numbers. Monte Carlo method is widely used in this area. One of the applications based on Monte Carlo method is Crystal Ball; detailed description of this application is also mentioned. At the close, an example of the capital project valuation is provided as the demonstration of Crystal Ball application.
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Possibilities of value analysis utilization by selection of mortgage lender
Pískatá, Petra ; Korytárová, Jana (referee) ; Puchýř, Bohumil (advisor)
The aim of this master’s thesis is to find the best type of mortgage loan for several kinds of borrowers. The first part describes personal housing financing, use of loans, use of mortgages in general. At the end of this theoretical part the value analysis is explained as a tool for mortgage lender (or the type of mortgage loan) selection and the way of reaching this goal is defined. Second part is a practical example of how to make decision and find the best choice. It selects the most important criteria and real cash flow is simulated to asset the price of each possibility. Using the discrimination method and efficiency rate the possibilities are ranked. Results are commented on and recommendations are set to every type of client. In conclusion, general method for selection before getting a mortgage is proposed.
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Influence of phase optic sensor to the DWDM network
Čučka, M.
This article deals with influence of phase optic sensor to the DWDM transmission. In DWDM network we use four lasers sources for data transmission on one optical fiber. Next one DFB laser is used for phase optical sensor on the same optical fiber. This article is focused on influence of power DFB laser to the DWDM network. We changed the power of the DFB laser from-2 dBm to 35 dBm and watching the bit error rate and eye of the decision of the DWDM system. This model is simulated in RSoft Optsim.
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Optimization of Active Network Element Control
Přecechtěl, Roman ; Kacálek, Jan (referee) ; Škorpil, Vladislav (advisor)
The thesis deals with the use of neuronal networks for the control of telecommunication network elements. The aim of the thesis is to create a simulation model of network element with switching array with memory, in which the optimization kontrol switching array is solved by means of the neural network. All source code is created in integrated environment MATLAB. To training are used feed-forward backpropagation network. Miss achieve satisfactory result mistakes. Work apposite decision procedure given to problem and it is possible on ni tie up in an effort to find optimum solving.
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Influence of Geometrical Parameters on Rupture Risk of Abdominal Aortic Aneurysm
Zemánek, Miroslav ; Janíček, Přemysl (referee) ; Tonar,, Zbyněk (referee) ; Holeček, Miroslav (referee) ; Burša, Jiří (advisor)
Tato práce je zaměřena na problematiku výpočtového a experimentálního modelování deformačně napjatostních stavů měkkých tkání se zaměřením na riziko ruptury u výdutě břišní aorty (AAA). V první části (kap. 1) je stručně nastíněn současný stav dané problematiky. Tato část shrnuje důležité poznatky publikované v dostupné literatuře. Pozornost je věnována zejména klíčovým faktorům pro stanovení rizika ruptury AAA. V další kapitole (kap. 2) je stručně popsána histologie cévní stěny a její výsledné mechanické chování, jakož i její patologie, především AAA. Druhá část práce (kap.3) je věnována experimentálnímu vyhodnocování deformačně napjatostního chování měkkých tkání, které je nutným předpokladem k věrohodnému výpočtovému modelování tohoto chování. V této kapitole je stručně popsáno experimentální zařízení speciálně vyvinuté pro testování měkkých tkání a typy zkoušek, které lze na tomto zařízení provádět. Dále jsou shrnuty klíčové faktory ovlivňující deformačně napjatostní chování měkkých tkání a experimentální ověření těchto faktorů na vzorcích z prasečích hrudních aort. V závěru této kapitoly jsou shrnuty nové poznatky vyplývající z experimentálního testování. Třetí část disertační práce (kap.4) je zaměřena na matematický popis deformačně napjatostního chování měkkých tkání, stručný popis používaných konstitutivních vztahu a postup při identifikaci parametrů pro tyto konstitutivní modely určované na základě provedených experimentálních zkoušek. Poslední část disertační práce (kap.5) je věnována výpočtovému modelování deformačně napjatostního chování AAA. V této kapitole jsou nejdříve shrnuty klíčové faktory a předpoklady pro vytváření modelů a pro vyhodnocování výsledku a dále jsou uvedeny materiálové parametry pro konstitutivní modely implementované do programu ANSYS. Byly provedeny testovací výpočty při použití hypotetické zjednodušené geometrie AAA, na kterých byly vyhodnoceny vlivy změny geometrie a vliv změny konsitutivního modelu na extrémní napětí ve stěně AAA. U reálné geometrie AAA byla navržena a otestována metoda výpočtu nezatížené geometrie z reálných CT snímků. Dále byl testován vliv zvýšení vnitřního tlaku jako rizika ruptury AAA. V závěru práce jsou shrnuty poznatky a možnosti výpočtového modelování a návrhy na další práce.
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New version of the Diffie-Hellman problem
Sayedová, Monika ; Holub, Štěpán (advisor) ; Hojsík, Michal (referee)
The Diffie-Hellman (DH) problem is a problem that is assumed to be difficult to do, hence the security of many cryptographic protocols is reduced to this problem. We show a new variant of the DH problem - the twin DH problem. We propose a method which allows us to simulate a decision oracle without knowing the discrete logarithms of the elements. We show twin ElGamal encryption and its security in a random oracle model. ElGamal is secure against chosen ciphertext attack when we assume that the symmetric encryption is secure against chosen ciphertext attack and the DH problem is hard. We prove that the DH non-interactive key exchange protocol is secure against an active attack in a random oracle model when the DH problem holds. 1
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Business model of a central heating plant
Dlouhý, Petr ; Křivánek, Mirko (advisor) ; Majerech, Vladan (referee)
Presented thesis deals with the usage of computer simulations in management decision. Modeled environment is selected heat-distribution network, however model and its conclusions can be used for arbitrary heat - distribution network. Model is focused on business management view ofcontrol of heatand electricity generating sourcesdepending on power-producing market, weather and other varying parameters. Powered by TCPDF (www.tcpdf.org)
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Application statistical methods for estimation customer lifetime value
Samuseva, Katsiaryna ; Vraná, Lenka (advisor) ; Sobíšek, Lukáš (referee)
This bachelor thesis pay attention on statistical methods managing relationship with customers and different approaches of estimation customer lifetime value for the company in long time period. It is an empirical type of bachelor thesis, where we will test the theoretical assumptions on the real data. During this paper we research and measure customers behavior in order to obtain quantitative outputs to adaptation marketing strategy, efficient allocation of resources and choosing key clients. On the basis of past and present behavior we simulate expected in future level of purchasing behavior and thus try to determine the most profitable target groups for high-quality application of marketing tools. Main purposes of thesis are describing various attitudes to modeling CLV, applying the model Pareto/NBD on real date of the company Práce pro Vás, to evaluate forecast applicability in practice. Following tasks will be resolved in this paper: to introduce advantages and disadvantages of each modeling CLV approach, to evaluate quality of Pareto/NBD model and to determine the advanced extensions of the research in this issue. There are various attitudes to estimation of CLV, which are described in theoretical chapters, but practical part of this paper focuses primarily on application of probability model Pareto/NBD. With the help of Pareto/NBD managers can get the information about future customers activity, i.e. expected number of transactions from real behavior a probability that customer will be active in observation period. In nowadays reality of overloaded market, almost in every business sector, every company should rely on quantitative base of marketing and choose target clients, on which to focus their marketing efforts. Exactly this need matches with described and applied in this bachelor thesis model Pareto/NBD, with it help we will estimate customer lifetime value for strategic decisions and managing relationship with customers. Finally, we will resolve continuous tasks and will achieve all the determined goals.
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