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Model of transport in vadose zone in vertisols under semiarid climate.
Weiss, Tomáš ; Ondovčin, Tomáš (advisor) ; Kodešová, Radka (referee)
Vertisols cover a hydrologically very significant area of semi-arid regions, and thus understanding of water flow and solute accumulation is very relevant to agricultural activity and water resources management. Previous works suggest a conceptual model of desiccation-crack-induced salinization where salinization of sediment in deep section of the vadose zone (up to 4 m) is induced by subsurface evaporation due to convective air flow in desiccation cracks. This thesis presents a conceptual model of water flow and solute transport in vertisols, and its numerical implementation. The model uses a single-porosity material but unconventionally prescribes a boundary condition representing a deep crack in soil and uses the unsaturated hydraulic conductivity as one of the fitting parameters. The numerical model is bound to one location close to a dairy farm waste pond, but the application of the suggested conceptual model could be possibly extended to all semi-arid regions with vertisols. Simulations were conducted using several modelling approaches with an ultimate goal of fitting the simulation results to the controlling variables measured in the field: water content, and chloride salinity of pore water. The development of the model was engineered in numerous steps; all computed as forward solutions by...
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Study of deformation processes in hexagonal materials
Čapek, Jan ; Mathis, Kristián (advisor) ; Karlík, Miroslav (referee)
The deformation mechanisms of commercially pure magnesium using advanced in-situ methods were investigated in the present work. Compression and tensile test were done at room temperature. Simultaneously, the neutron diffraction was measured and the acoustic emission was recorded. The microstructure of the deformed material was also studied by means of optical microscopy and electron back-scattered diffraction. These measurements provided information about twin nucleation and growth, microstructure changes and the influence of the orientation of grains on the number of twins and their shape. The values obtained were compared to the Elasto-Plastic Self-Consistent model, which provides information about the activity of deformation mechanisms. We focused on clarifying the influence of twinning activity on asymmetry between tensile and compression deformation.
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Forecast of the size and structure of the prison population in the CR
Koňařík, Martin ; Burcin, Boris (advisor) ; Kučera, Tomáš (referee)
Forecast of the size and structure of the prison population in the CR Abstract: Forecasting of prison population in the Czech Republic is almost an unexplored topic. To the whole prison system as a topic is also devoted little space in the literature. The most advanced methods of forecasting of prison populations cannot be used to the Czech data, which are used in countries with a long tradition of it. The data are not connected between Ministry of Justice and the Ministry of Interior, and also differ in their definitions. It is therefore necessary to use a simplified method, which correspond to the data sources. The process is also interfered with unexpected external factors such as the amnesty of the President of the Republic on the 1 January 2013. Models for convicted expected forecast decline in their number by the end of 2013 to 12 to 19 thousands. Models further assume that a decline in 2013 would take place, even if there were no amnesty. Models for the accused assume their fluctuation around the same values. Follow-up calculations show that the state would save significantly by the projection models variants and also the burden on prison officers in correctional facilities would be reduced to 2.1 to 3.2 prisoners per guard from the current 3.5 prisoners per guard. Keywords: prison projection,...
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Monitoring of settlement in road constructions
Karlín, Petr ; Novotný, Jan (advisor) ; Kresta, František (referee)
This thesis considers some issues regarding geotechnical monitoring of settlement of subsoils on roads, highways in the Czech Republic. The first part try to explain process of construction embankments with following standards and prescriptions. Second part belongs to geotechnical monitoring of settlement of subsoils, where author had selected 7 measuring profiles for further work on archive exploration. From these exploration were excluded information about exact location. Third part is creation of 9 geotechnical models in 2D - Plaxis software, comparison with real data and short part about using this kind of work for practice use.
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From textual specification to formal verification
Šimko, Viliam ; Hnětynka, Petr (advisor) ; Gruhn, Volker (referee) ; Steinberger, Josef (referee)
Textual use-cases have been traditionally used at the design stage of the software development process to describe software functionality from the user's perspective. Because use-cases typically rely on natural language, they cannot be directly subject to formal verification. Another important artefact is the domain model, a high-level overview of the most important concepts in the problem space. A domain model is usually not constructed en bloc, yet it undergoes refinement starting from the first prototype elicited from text. This thesis covers two closely related topics - formal verification of use-cases and elicitation of a domain model from text. The former is a method (called FOAM) that features simple user-definable annotations inserted into a use-case to make it suitable for verification. A model-checking tool is employed to verify temporal invariants associated with the annotations while still keeping the use-cases understandable for non-experts. The latter is a method (titled Prediction Framework) that features an in-depth linguistic analysis of text and a sequence of statistical classifiers (log-linear Maximum Entropy models) to predict the domain model.
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Design and realization of a new laboratory exercise with PLC B&R Automation
Cejpek, Zdeněk ; Němec, Zdeněk (referee) ; Lang, Stanislav (advisor)
This bachelor thesis is concerned with designing of a laboratory task primary dedicated for the course „Advanced control methods“, which for the education uses the instruments of company B&R Automation. From possible aproaches chooses modeling of dynamic systems using analog electrical circuits. Those circuits are realized in modular manner, in order to allow building models of various systems. The thesis also includes a desing of proper casing, which simplifies the manipulation by building of the systems. Using designed prototype modules, a model of a separately excited DC motor was built. This model is used for realization of the laboratory task, for which is provided a short manual including some basic program for Automation Studio. The thesis also briefly introduces the company B&R, it´s products and a PLC configuration used in courses „Advanced control methods“.
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Behavioral Model of Current Conveyor with Advanced Controllable Inter-Terminal Relations
Jagla, Lukáš ; Langhammer, Lukáš (referee) ; Šotner, Roman (advisor)
Bachelor's thesis deals with model of current conveyor with advanced controllable inter-terminal relations. The behavioral model based on commercially available active devices has been proposed and designed as real implementation (including BCP design for experiments). Features of the behavioral model are verified by PSpice simulations as well as by experiments. Proposed device is utilized for synthesis and design of unconventional types of electronically controllable sine-wave oscillators and electronically adjustable filters. Simulated characteristics of the behavioral model as well as proposed applications are compared with experiments.
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Minimization of the car fuel consumption on the route elevation profile
Srba, Jan ; Klimeš, Lubomír (referee) ; Mauder, Tomáš (advisor)
This thesis deals with mathematical modelling of the fuel consumption of a vehicle going on the route described by its elevation profile. It contains fundamentals of vehicle longitudinal dynamics which are essential for creating the model. The main goal of this thesis is to minimize the fuel consumption on given route using heuristic algorithms, hence a description of used heuristic algorithms and results of their implementation in MATLAB are presented.
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Manufacturing the prototype of rearview mirror on FDM 3D printer
Fridrich, Radim ; Kolář, Ladislav (referee) ; Zemčík, Oskar (advisor)
The goal of my bachelor thesis lies in designing and constructing a car rear-view mirror. Considering the requested function and properties, I have decided to use the Rapid Prototyping technology – the Fused Deposition Modelling method. First part of my thesis consists the FDM method introduction and the list of materials needed. The second part covers the 3D model design and his its production. The conclusion of the thesis shows the economical evaluation of my creation.
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Modelling and HIL Simulation of Vehicle Boot Door Control
Musil, Filip ; Matějásko, Michal (referee) ; Brablc, Martin (advisor)
This diploma thesis focuses on an analysis, a model creation and simulations of a car boot door mechanism. The problem was analyzed on the basis of real measurements made on three different vehicles. Based on the measurements, computational models describing the real system at different levels of complexity were created. Matlab/Simulink was used to create and calculate the models. The output of the thesis is the simulator of a car boot door which also includes simplified model of a control unit. The simulator should provide an approximation of current and kinematic quantities of these mechanisms. The model is implemented on dSPACE platform that allows real-time simulations. The simulator can be modified in terms of changing the parameters of the mechanism and modifying some of its results.
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