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Infuence of eardrum position on sound transmission
Krbálek, Jaroslav ; Dušek, Daniel (referee) ; Pellant, Karel (advisor)
The human eardrum is inclined at an angle of 50 ° t o the axis of external auditory canal. The main objective of this thesis was to determine the impact of the inclination on sound transmission characteristics of external ear canal. It was observed influence of the various features of the eardrum and of the malleus weight on calculated transmission characteristics. Simple finite element model (FEM model) was created in the ANSYS program. The acoustic subsystem of the outer ear tube, elastic eardrum and solid malleus were created. The external ear canal model was modeled as one sided open cylinder which was terminated diagonally bedded with eardrum. In addition to the impact of the eardrum inclination, the influence of the eardrum elasticity and the weight of malleus on the sound transmission characteristics of external ear canal was also monitored. The eventual presence of the coincidence effect was also studied.
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Mathematical modelling of walking robots
Kiša, Daniel ; Opluštil, Zdeněk (referee) ; Tomášek, Petr (advisor)
Tato diplomová práce se zabývá matematickými modely kráčejících robotů. Dva z těchto modelů jsou vybrány a analyzovány. Pasivní model "rimless wheel" , který slouží jako základ pro další, složitější modely, je podrobně analyzován. "Compass gait" model dvounohého robota je v práci analyzován a numericky simulován v programovacím jazyce Python. Metoda pro nalezení podmínek pro pasivní chůzi robota je rovněž implementována.
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Analysis of Corporate Performance Using Mathematical Modelling and Computer System to the Support of Organization's Strategic Management
Horáková, Eva ; Švehla, Michal (referee) ; Chvátalová, Zuzana (advisor)
The main goal of this diploma thesis is to analyse financial productivity of a chosen company, to find deficiencies and suggest possibilities for improvement of the situation. First there is theoretical part consisting of an introduction of chosen financial indicators, such as profitability, indebtedness etc., and also a description of Maple, programme used for mathematical exercises. In the practical part there is a description of Brno company TRON, the business objective of which is LED lighting. The financial indocators are made in the programme Maple, the balance and also profit and loss accounts for a few consecutive years are analysed, from which we can determine the financial situation of the company. The result should help the chosen company with future decisions.
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Li-ion battery model
Loucký, Vojtěch ; Toman, Marek (referee) ; Cipín, Radoslav (advisor)
This diploma thesis deals with description of the principle of Li-ion cells, literature search on the topic of mathematical models of Li-ion cells and the creation of a selected mathematical model in MATLAB, which is able to simulate the course of voltage and state of charge as a function of time for different ambient conditions, such as various aging of battery .The creation of both the model and the procedure of identification of parameters necessary for the creation of the model are described here as well as different options of identification of parameters. The selected Thevenin model is then compared with the real course and the accuracy of the model is evaluated with respect to the measured course.
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Accurate positioning of pneumatic drives
Volf, Marek ; Nevrlý, Josef (referee) ; Marada, Tomáš (advisor)
Thesis starts with brief overview of the present role of pneumatic actuators. Further research is carried out in modelling and control of pneumatic actuators. A basic overview of thermodynamic laws is presented. These laws are used to assemble a mathematical model of the pneumatic drive. Subsequently the identification of model parameters is shown. A controller is propřed using fuzzy PID algorithms. Results are compared with the conventional PID controller.
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Reliability analysis of embankment dams endangered by filtration deformations
Čejda, Marek ; Baroková,, Dana (referee) ; Fošumpaur, Pavel (referee) ; Říha, Jaromír (advisor)
Subject of the dissertation is a probability analysis on creation of embankment subsoil filtration deformations. Out of the broad topic of filtration deformations, the dissertation is focused at initiation of the process. At this phase, the overlying layers downstream of levee get uplifted, and eventually get breached. The process of downstream subsoil failure probability estimation is formulated using mathematical and statistical modelling. Within the scope of parametrical study the suggested method is applied onto a test environment. Results of the probability estimation are compared with results obtained using Limit state design method. The results of stochastic modelling can be used for improvement of Limit state design method precision.
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Pressure optimisation in the water-supply system of the Střelná village
Sucháček, Tomáš ; Valkovič,, Pavel (referee) ; Ručka, Jan (advisor)
This document aims on aplication of sophisticated software programs to accomplish hydraulic analysis of real water supply, design and optimization measures for improvement of pressure conditions in water network. In this work is stated a list and description of software enabling to accomplish static or longterm hydraulic analysis of water supply when the most world used program EPANET 2.0 is described more deeply. There is described working of a EPANET and his algorithm also there are explain principles on which EPANET is based. During the hydraulic analysis of real system was used sophisticated software EPANET 2.0. With this program was processed hydraulic analysis of chosen water supply system of small consumption area. Based on the results of analysis pressure conditions has been designed and optimized measure to improve pressure conditions in the water network.
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Assessment of pressure conditions in the water supply network of the village Poličná
Zuzaňák, René ; Libosvár, Dušan (referee) ; Ručka, Jan (advisor)
The bachelor thesis is devoted to the hydraulic analysis of the water supply network in the municipality of Poličná, Vsetín district. The introductory part of the thesis is devoted to the theory of mathematical modelling of the water supply network. A quasi-dynamic hydraulic model of the entire water supply network was created to determine the pressure conditions of the water supply network and then calibrated and verified based on the pressure measurements on the water supply network. The characteristic operating conditions of the water supply network were reflected in the simulation model of EPANET 2.2. Following the existing scale and type of development given by the current zoning plan of the municipality of Poličná, the pressure conditions on the water supply network of the municipality of Poličná were assessed using the results of the hydraulic analysis. The thesis includes proposed measures to optimize the pressure conditions for the prospective scale of development.
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The study of the energy performance of buildings with controlled internal temperature
Karmín, Luboš ; Čermák, Jan (referee) ; Šťastník, Stanislav (advisor)
In this thesis is summarized close topic about buildings with controlled internal temperature, especially cold stores. These objects have one of the biggest energy consumption among all structures. The goal of this thesis is to write down standard requirements for the construction of cold stores and summarize process that have a significant effect on overall consumption of energy in this type of structures. Calculations made in this thesis review changes in physical properties of surface emissivity PUR panels which are directly exposed to sunlight. Option of shielding of solar load is included as well. Researched data could be base for continue in studying of the topic and design of future saving optimization of cold stores etc..
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