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Dissertations / Theses on the topic 'Výpočetní modelování'
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1
Floková, Kateřina. "Zjednodušené výpočtové modelování spalování biomasy na roštu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229949.
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The aim of this thesis is to assemble simplified computational 3D model for straw grate combustion, based on data provided by detailed computational 1D model. This thesis is organized as follows. Firstly, current state of CFD grate combustion modelling is described. The main body of this thesis is focused on creation simplified 3D model, which includes pressure losses calculation, aproximation of data provided by outcomes of detailed 1D model and analysis of heat transfer during combustion process. Simulation results dealing with radiation heat transfer and heat conductivity are included in conclusion.
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Bialožyt, Michal. "Modelování proudění v zařízeních procesního průmyslu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230291.
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Tato diplomová práce se zabývá vlivem zjednodušené geometrie na výpočet pomocí počítačového modelování proudění. Konkrétně se jedná o možnost náhrady části trubky porézní vrstvou, která má odpovídající tlakovou ztrátu jako nahrazený úsek. Řešen je také přestup tepla a jeho vliv na proudění a tlakovou ztrátu. Jako nejúčinnější řešení se ukázalo zakomponování vlivu přestupu tepla na tlakovou ztrátu do porézní vrstvy. Toto řešení nevyžaduje použití rovnice energie a je tudíž nejméně výpočetně nákladné. Získané poznatky jsou poté testovány na modelu reálného výměníku tepla, který má problémy se zanášením a distribucí proudu. Náhrada porézní vrstvou se ukázala jako spolehlivé řešení. Dalším bodem práce je testování závislosti výpočtu turbulentního difúzního spalování na jemnosti výpočetní sítě. K tomuto účelu byl využit model spalovací komory. Po prvním výpočtu byla výpočetní síť, na základě výsledků, zjemněna v oblasti vířiče a v oblasti plamene, kde dochází k největším gradientům. Po adaptaci výpočetní sítě bylo dosaženo téměř dvojnásobného počtu buněk a výpočet byl opakován. Výpočet s adaptovanou výpočetní sítí se ukázal být mnohokrát časově náročnější a byl proto zastaven jelikož přesahuje rámec této práce. Předběžné výsledky byly zpracovány.
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Foretník, Jan. "Architektura, geometrie a výpočetní technika." Doctoral thesis, Vysoké učení technické v Brně. Fakulta architektury, 2010. http://www.nusl.cz/ntk/nusl-233224.
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The topic of this thesis is geometry, its practical usage in architect’s profession (especially its application in computer design and realization of buildings) and its current way of teaching at schools of architecture. The thesis systematically describes geometric objects’ construction and properties, its modelling in CAD systems and examples of its usage in architecture, in some cases including the way of its realization. Geometric objects are systematically organized into chapters about point, curves, surfaces and solids. The outcome of the thesis is a concept of geometry courses modification in the way that they encourage the spatial imagination development instead of “drill” and the gained knowledge is directly useful in architect’s profession. A supplementary research (in appendix) analyses the state-of-the-art of teaching of geometry at selected schools of architecture in Europe and its effect to spatial imagination development. The research was focused at contents and form of the selected geometry courses and its influence to spatial imagination.
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Kubis, Aleš. "Modelování a tlumení vynucených pulzací." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228752.
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The aim of diploma thesis is design math and numeric system, which simulate these features: model of threeplunger piston pump, system of piping and damping elements. This thesis also contains chapters, which describing numeric models of particular’s elements of system with charts of function dependencies from computation’s program. The last chapter contains numeric model of treeplunger piston pump without damping elements. Continuation of my diploma thesis should be a harmonized of damping elements and designed pump.
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Gardáš, Milan. "Výpočetní model a analýza samočinně řízeného vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2019. http://www.nusl.cz/ntk/nusl-403814.
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This thesis discusses autonomous vehicles. At first it contains describing development of these type of vehicles, how they work and discuss their future development. Further it describe tools which can be used for create model of autonomous vehicle. The thesis includes design, description of the development and testing of the model in the UPPAAL Stratego verification environment. The resulting model is a system of intercommunicating timed automata. The analysis of the model properties is based on the method of statistical verification. The model allows us to investigate behavior of an autonomous vehicle in situations which correspond to regular traffic.
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Göringer, Tomáš. "Modelování ultrazvukového pole metodou konečných prvků." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217976.
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The first part of the Master´s thesis describes physical principles of ultrasound and fundamental variables of ultrasound field. It also deals with mathematical description of finite element method and outlines basic principles of ultrasound computed tomography. The second part introduces finite elements generator GMSH. This part focuses on the process of ultrasound field simulation and presents software that can be used for field simulation. The last part contains examples of models.
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Hájek, Petr. "Výpočetní simulace přenosu zvukových signálů lidským uchem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231143.
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The presented thesis concerns the biomechanics of hearing. The main aim of this work is the determination of so called corrections which allow for the comparison of synthetic audiograms and measured audiograms. With these corrections we attempt to overcome the discrepancy that exists between the computational modelling and audiological measurement. The discrepancy lies in a fact that the computational modelling usually simulates the sound coming from a free eld to the external auditory canal, while audiological measurement is realized by audiological headphones, whether the auditory system is healthy or injured. Then corrections adjust the computational model so that the obtained result is comparable to audiological measurement. In this work is also addressed the influence of stapes kinematics to the excitation of basilar membrane. The movement of stapes consists of piston-like movement and rocking movement. The computational simulation shows which movement is more signicant for the excitation of basilar membrane and how this effect can be used in otosurgery, in particular, for type IV of tympanoplasty.
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Křivohlávek, Roman. "Numerické modelování proudění v bezpečnostním přelivu vodního díla Letovice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372178.
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This diploma thesis deals with numerical modeling of water flow. The numerical model was created to simulate the flow of water through the spillway of the Letovice dam. The spillway is constructed as a side channel and is located on the right bank. Autocad 2015 was used to create a 3D model, and FLOW-3D version 11.0.4 was used to create a numerical model.
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Škrach, Mikuláš. "Modelování proudění v bezpečnostním přelivu vodního díla Letovice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392153.
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The thesis is concerned on numerical modeling of a scheduled spillway on water structure Letovice. The goal of the thesis is to verify hydraulic calculation using numerical modeling and to verify the capacity of the spillway. The spacial model was created in SketchUp program and the numerical modeling was implemented in Flow-3D program. The reason to recalculate the spillway is its reconstruction and extension in order to make high a capacity of it in the final project of Letovice water structure whole reconstruction.
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Prochazková, Zdeňka. "Numerické modelování šíření zvuku pomocí diferenčních metod." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231394.
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The goal of this thesis is to introduce the finite difference method (FDM) adjusted for usage in modeling of sound propagation, and other approaches that are used together with this method. These approaches include selective filtering and time integration using the Runge-Kutta method, which has low computer memory requirements. An important topic in modeling sound propagation are boundary conditions. The thesis examines and verifies several types of boundary conditions. Included in the thesis are solutions to example problems implemented in Matlab.
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Suchý, Václav. "Výpočet tlakových ztrát spalinových kanálů s využitím matematického modelování." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378738.
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This diploma thesis deals with the calculation of pressure losses in the flue gas ducts. First part of this work describes properties of flue gas and flow dynamics. Part of the theoretical analysis was detailed study of pipeline elements with emphasis on the reasons for the existence of pressure loss in the flow, calculations of the resistance coefficients and possible methods of reducing the losses. In the practical part, a model of the pressure loss calculation of the existing flue gas line installed in the incineration plant was created. At the end of the thesis a proposal for optimization of this route was made with emphasis on the reduction of the overall pressure loss. By optimization the pressure drop of the specified route was reduced from 3581 Pa to 2647 Pa, i.e by 26% and the required power input of the fan was reduced from 225 kW to 166,5 kW.
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Ředina, Richard. "Model fibrilace síní." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442495.
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The aim of this master thesis is to create a 3D electroanatomical model of a heart atria, which would be able to perform atrial fibrillation. To control the model, the differential equations of the FitzHugh-Nagumo model were chosen. These equations describe the change of voltage on the cell membrane. The equations have established parameters. The modification of them leads to changes in the behavior of the model. The simulations were performed in the COMSOL Multiphysics environment. In the first step, the simulations were performed on 2D models. Simulations of healthy heart, atrial flutter and atrial fibrillation were created. The acquired knowledge served as a basis for the creation of a 3D model on which atrial fibrillation was simulated on the basis of ectopic activity and reentry mechanism. Convincing results were obtained in accordance with the used literature. The advantages of computational modeling are its availability, zero ethical burden and the ability to simulate even rarer arrhythmias. The disadvantage of the procedure is the need to compromise between accuracy and computational complexity of simulations.
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Mishuk, Aliaksandra. "Zjednodušené počítačové modely prvků pro distribuci vzduchu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372214.
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The goal of this master thesis is to create a simplified model of an actual swirl diffuser using CFD (Computational Fluid Dynamics) simulation, so that it would be easy to calculate (would have a simple geometry, a proper mesh and would enable quick definition of the model’s boundary conditions) and would also create an airflow pattern in space as close to reality as possible. In the process a CFD model with a certain geometry was created. Subsequently, various model settings were tested. Calculation results were compared with the results of the experimental measurement done using the PIV method.
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Hrdý, Libor. "Automatické generování okrajové plochy kraniálního implantátu." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-235539.
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This thesis is focused to problems of automatic generation of border surface for cranial implant. This document includes description of 3D modeling human tissue, followed with issue of cranial implant. Next it includes possible perspectives of solving automatic generation problems for implant border. Second half of this document is focused to implementation of tool for automatic generation of border surface. Final part deals with results of work with this tool.
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Musilová, Jana. "Pojištění majetku a využití modelování expozice." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-3606.
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Práce je zaměřena na pojištění majetku v souvislosti s rizikem přírodních katastrof. Objasňuje základní pojmy používané v pojišťovnictví, popisuje pojistné produkty určené pro pojištění majetku, zmiňuje důležitou roli zajištění a zajistného trhu. Hodnotí závažnost přírodních katastrof z celosvětového pohledu a z hlediska České republiky. Hlavní problematikou je jednak možnost stanovení rizika povodní v různých oblastech a jednak odhad pravděpodobnostního rozdělení škod v pojistném kmeni. Metoda stanovení rizika je ukázána na vzorovém portfoliu pojistných smluv.
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Pešek, Michal. "Výpočet parametrů asynchronního motoru metodou konečných prvků." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219181.
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This project is focused on finite element method, for purposes of asynchronous motor modeling. Program FEMM is used here, which works with two-dimensional models. The model is based on an existing motor. Then was conducted a series of simulations that are used to calculate the parameters of the circuit model. Then was measured the existing asynchronous motor and performed the calculation of the circuit model parameters of the motor. Compared with data obtained from motor and models Then was compared their torque characteristics. Moments was identified at certain slip frequencies and voltage or current in circuit model.
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Hlavínek, Jakub. "Software WEST pro výpočet čistíren odpadních vod." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392043.
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In it´s theoretical part, my master thesis handles selected softwares for wastewater treatment mathematical modelling. It summarizes and compares availible softwares on the market, it´s use, advantages and disadvantages. The practical part deals with an exemplar evaluation of selected wastewater treatment plant according to Czech normative standards and evaluation of the same wastewater treatment plant per mathematical model created in WEST program. The assembly of a wastewater treatment plant model consisted of studies, creation of the layout, insertion of provided data, calibration and model evaluation.
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Letochová, Jana. "Optimalizace využití solární energie v rodinném domě." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226847.
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This thesis is focused on solar energy as an alternative sustainable energy source and its use in family homes. The first part focuses on possible connections of solar energy systems and their design using software simulations. The second part consists of a design for the preparation of hot water in the family home. Finally, a comparison of the efficiency of the set collector according to different calculation methods is included.
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Pokorný, Jan. "Výpočtové modelování radiálních hydrodynamických ložisek pro vodní stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382572.
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The aim of this thesis is to calculate the stiffness and damping coefficients for radial hydrodynamic bearings. Cylindrical and lemon hydrodynamic bearings are considered. The solution to this problem mainly depends on the hydrodynamic pressure in the bearing. The numerical solution of the Reynolds equation is used to calculate the pressure. The effect of variable viscosity and density of the lubricant due to temperature changes is considered. The static equilibrium position of the journal centre is also solved. The stiffness and damping coefficients are determined using small amplitude journal motions about the equilibrium position. Three methods for determining these coefficients are presented. The outcome of this thesis is an algorithm for the calculation of stiffness and damping coefficients for cylindrical and lemon bearings. Results for lemon bearings are presented and comparison with the commercial software DynRot BR is made. The benefit of this thesis is the creation of an algorithm for the calculation of journal centre equilibrium position, a new way of incorporating the temperature changes in the viscosity and the density of the lubricant, and the modification of a method for calculating stiffness and damping coefficients based on experimental analogy.
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Ondriašová, Patricie. "Aspekty modelování trubkových výměníků tepla s využitím dostupných softwarových nástrojů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241907.
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The proposed master´s thesis looks into the aspects of tubular heat exchangers modeling using available software tools. In the first – theoretical part there is a description of distribution and types of heat exchangers, including a detailed description of the industrial heat exchanger solved in this thesis. Another chapter is devoted to the main computational relations and calculation methods used in the context of thermo-hydraulic calculation. The main part of thesis consists of chapters, which are devoted to selected available software and perform calculations using the software in the specific industrial case. Finally, there is summary of the various software and a recommendation for the specific program for the need.
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Bílek, Vladimír. "Elektromagnetická analýza a modelování asynchronního stroje s plným rotorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442791.
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Tato diplomová práce se zabývá elektromagnetickou analýzou a modelováním asynchronního stroje s plným rotorem. Tato práce tedy zahrnuje literární rešerši na téma vysokootáčkových elektrických strojů s porovnáním s klasickými elektrickými stroji s převodovkou a popisem jejich výhod či nevýhod, rozdělení vysokootáčkových elektrických strojů s plnými rotory a srovnání jejich výhod či nevýhod, kde se tato práce nejvíce soustřeďuje na vysokootáčkové asynchronní stroje s plnými rotory a jejich použití v průmyslu. Dále se tato práce zabývá metodami výpočtu elektrických asynchronních strojů s plnými rotory. Proto jsou zde uvedeny a popsány metody výpočtu stroje mezi které patří analytické metody i metoda konečných prvků. Vzhledem k povaze elektrických strojů s plnými rotory je hlavně kladen důraz v této práci na výpočet stroje pomocí metody konečných prvků ve 2D prostoru s využitím korekčních činitelů konců plných rotorů, které jsou zde velmi detailně popsány a rozděleny. Na základě dostupné literatury je vypočítaný elektrický stroj s plným rotorem pomocí MKP analýzy. Elektromagnetický výpočet stroje je automatizován pomocí skriptu vytvořeného v Pythonu. Dalším hlavním cílem této práce je popis tzv. náhradních modelů, uvedení jejich výhod či nevýhod, použití v jiných průmyslových odvětvích a hlavně použití náhradních modelů na elektrický stroj s plným rotorem. S využitím náhradních modelů je dále optimalizovaný vybraný asynchronní stroj s plným rotorem a to pomocí programů SymSpace a Optimizer. Pro samotnou optimalizaci byly uvažovány 3 návrhy stroje, které byly na závěr mezi sebou porovnány a to hlavně z hlediska jejich elektromagnetického výkonu.
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Vach, Tomáš. "Návrh a výpočet sušicího zařízení pro dřevozpracující průmysl." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228021.
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The thesis considers a stabilization of temperature of a wood fiber during production of medium close fibre boards MDF in a wood-processing industry. The original purpose to solve energetic optimalization of a kiln dryer has become a serious problem. It turned out that production suffers with a big heat loss which results in big heat loss gained during a kiln drying. Primary aim of this thesis is an examination of a cooling effect of environment on chosen parts of a production line and suggestion of acceptable proceeding to minimize heat loss and to rise temperature of the wood fiber to required temperature. Solution is aimed on the section of a production line between drying equipment and press. First part of the thesis introduces technology of production of fibre boards, introduction to heat transfer problems and also basics of computer modeling of heat flow and transfer using CFD simulation. The next part includes an evaluation of the heat loss of chosen parts of the production line in a current working condition and its comparison with computer simulations. Verification of accuracy of the results while using both approaches to solution is a first step to the improvement of the current situation. It is possible to use the verified calculation model for the following solution of effects on convective and radiation heating of a wood fiber layer. An important factor in the last period of a calculation is a real temperature of the fiber board-mat at the entrance to a press. The higher entering temperature in a set temperature range is reached, the lower time needed for pressing will be and simultaneously the whole industrial process will be cut short. The solution of a problem leads to an achievement of an energy saving and should become a solid basis from which it would be possible to evaluate an improvement of production of MDF boards. The conclusion of the thesis includes an analysis of findings which refers to a heating of wood fiber and it’s effectiveness for a practical use.
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Rybka, Michal. "Výpočet tepelné sítě rozváděče typu UniGear a porovnání se zkouškou oteplením jmenovitým proudem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219020.
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The Master’s thesis deals with thermal network computation of UniGear type switchgear and it compares the calculated results with the real temperature rise test. The thesis describes both electrical and non-electrical characteristics of such a switchgear as well as its application in variol fields of industry. Description of switchgear auxiliary equipment is obvious part of the thesis. Modelling of current carrying track in software environment of Autodesk Inventor and preparing of this current carrying track for thermal network calculation in software environment of ANSYS follows. Main part of this thesis is presentation of thermal analysis results and their comparison with the real temperature rise test.
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Lang, Rostislav. "Návrh a výpočet membránové konstrukce zastřešení stadionu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226463.
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This diploma thesis deals with problem of design and calculation of membrane structure of stadium roof. This is a complex engineering problem, which includes many partial problems: finding of initial form of membrane, statically and architecturally suitable arrangement of catenaries, economical solution of boundary conditions (foundations). All components affect each other and cannot be dealt without mutual coordination. It always greatly depends on the experience and intuition of engineer who design such structure. Task which cannot be resolved according to the theory of the first order. Equilibrium forces on the deformed structure, which in many projected structures gives satisfactory results, did not correspond to reality. It is therefore necessary to consider equilibrium of forces on the deformed structure according to the theory of large deformations. Diploma thesis was entered with regard to the intention of the companies Ing. Software Dlubal s.r.o. and FEM consulting s.r.o., working together to develop software RFEM. These companies plan to complement this program system with a module MEMBRANE for searching of initial shapes of membrane structures. This work is a contribution to the creation of this module.
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Pařízková, Iva. "Matematický model teplárenské sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241664.
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This thesis is focused on creating an iterative model for thermal and hydraulic calculation of heating net in Visual Basic of Application. Flowing medium considered is hot water. Although data for heating network in Brno are recorded in this model, its use for any other heating network is possible. This model allows also calculation of minimal temperature of the source and calculation of heat loss of every consumer. This is very useful when considering, if supplying some of the consumers with the heat from a local source would not be more effective. The second part of this text is aimed to evaluation of different ways how to reduce the heat loss in heat network for source Červený mlýn. Both current situation and possibilities for the future are considered.
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Martinek, Dominik. "Simulace fyzikálních jevů s využitím celulárních automatů." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237104.
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This master's thesis deals with modelling and simulation of physical phenomena by cellular automata. The basic methods which model physical phenomena is enumerated and descibed in this thesis. One of the important part of this thesis is a set of demonstration models. Each model is focused on one selected area of physical phenomena. All models are described by transtition rules and the procedure of derivation of these rules is also presented here. There rules were used in implemented models. Another part of this thesis contains of a simulation application for these models. The real application had been implemented in accord with this design and it has been used to perform the simulation experiments with exemplary models. Results of the simulation experiments are discussed in conclusion of this thesis. One exemplary model had also been adapted for parallel processing. The performances on a computer with different count of working processors were measured and are also discussed in the conclusion of this thesis
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Procházka, Jiří. "Porovnání výpočtů zkratových proudů simulačními programy s normou ČSN EN 60909 ed.2." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400593.
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This master's thesis deals with the comparison of the short-circuit current calculation for a model example according to the standard IEC 60909-0:2016 with simulation programs. The first part deals with short-circuit in general together with an example of calculation of short-circuit currents. The next part of the master’s thesis deals with creating models of network elements by different simulation programs. The last part deals with dynamic simulation of model example together with programs settings. Finally, the results of simulations are evaluated.
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Jurík, Michal. "Lávky pro pěší tvořené plochým obloukem." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-392287.
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This doctoral thesis focuses on the research of the pedestrian bridges formed by the flat arch. To understand the basic static behaviour of the flat arch it was necessary to make a study of the development of the direct flat arch as footbridge with large span and the impact of stiffness on its camber. For the mathematical modeling FEM software ANSYS were used. The calculation has shown that a design of purely concrete flat arch would demand enormous bending stiffness, which can be achieved only through a massive cross-section. The findings gained in this chapter were further used to design a unique pedestrian bridge formed by the curved in plan flat arch, where to transfer of the large bending moments a steel pipe was designed. Several variants with different span and rise of the arch in plan were tested. From the tested variants was then selected footbridge with a span of 45 m and with the rise of the arch 10 m, which seemed to be the best solution according to the calculations and it was further analyzed in detail. The studied structure is formed by curved concrete slab that is stiffened through the steel brackets on the inner side of a steel tube with a graded thickness. The external cables that are situated in the handrail pipe balance the dead load torsional moment. Designed structure and the static analysis procedure were verified on a fully functional 1:6 scale model. The thesis describes the model analogy used for the design of the model, its structural design and its implementation. Load tests on the model confirmed correctness of the design of the proposed curved in plan pedestrian bridge, its high carrying capacity and the accuracy of the developed procedure of static analysis. Results and experiences acquired from the design and the realization of model are the basis for a practical realization of studied structures. The last part of the thesis deals with the possibility of replacement of the steel components with concrete in pedestrian bridges formed
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Sebera, Václav. "Výpočetní modelování vybraných kompozitů na bázi dřeva." Doctoral thesis, 2013. http://www.nusl.cz/ntk/nusl-176451.
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Houška, Petr. "Architektury hlubokého učení pro analýzu populačních neaurálních dat." Master's thesis, 2021. http://www.nusl.cz/ntk/nusl-438039.
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Accurate models of visual system are key for understanding how our brains process visual information. In recent years, deep neural networks (DNN) have been rapidly gaining traction in this domain. However, only few studies attempted to incorporate known anatomical properties of visual system into standard DNN architectures adapted from the general machine learning field, to improve their interpretability and performance on visual data. In this thesis, we optimize a recent biologically inspired deep learning architecture designed for analysis of population data recorded from mammalian primary visual cortex when presented with natural images as stimuli. We reimplement this prior modeling in existing neuroscience focused deep learning framework NDN3 and assess it in terms of stability and sensitivity to hyperparameters and architecture fine-tuning. We proceed to extend the model with components of various DNN models, analysing novel combinations and techniques from classical computer vision deep learning, comparing their effectiveness against the bio-inspired components. We were able to identify modifications that greatly increase the stability of the model while securing moderate improvement in overall performance. Furthermore, we document the importance of small hyperparameters adjustments versus...
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Jakubec, Dávid. "Interakce Proteinů s Nukleovými Kyselinami: od Struktury k Specificitě." Doctoral thesis, 2020. http://www.nusl.cz/ntk/nusl-436911.
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Sequence-specific interactions between proteins and nucleic acids play an essential role in the cell biology. While several molecular mechanisms contributing to the binding speci- ficity have been identified empirically, no general protein-DNA recognition code has been described to date. In this thesis, I explore selected characteristics of protein-DNA inter- actions using computational methods. First, the pairwise interactions between the basic biomolecular building blocks-amino acids and nucleotides-are investigated. It is shown that several statistically enriched, biologically relevant interaction motifs correspond to the most energetically favorable configurations of the respective binding partners. In ad- dition, a relationship between the physico-chemical properties of the amino acid residues found at the protein-DNA interface and the local geometric features of the DNA helix is presented. Next, the applicability of molecular dynamics-based setups to the description of binding equilibria in protein-DNA systems is investigated. Discrepancies are observed between the description offered by the computer simulations and experimental results, as well as between the results obtained using two molecular mechanical force fields. Finally, the more general evolutionary aspects of protein organization...