National Repository of Grey Literature 120 records found  1 - 10nextend  jump to record: Search took 0.02 seconds. 
Parametrizace a validace růstového modelu pro řepku ozimou
Vrána, David
This diploma thesis is focused on winter rape growth and development modeling by DSSAT software. The date of flowering, date of maturity, yields, above ground biomass dynamics and LAI dynamics were used for parameterization and consequent validation of the selected model. The data from field trials conducted by Central Institute for Supervising and Testing in Agriculture (ÚKZÚZ) within Lednice station (period from 1999 to 2006) and Domanínek station (period from 1999 to 2011) were used for simulations. Moreover data from field trials conducted by Mendel University in Brno within Domanínek station (period from 2012 to 2014) were used for winter rape modeling. This experiment consisted of eight variants with different sowing dates, nitrogen fertilization amounts and two cultivars. The dataset for DSSAT model testing was prepared based on above mentioned experiments. Despite the first attempt to simulate winter rape growth and development in Central Europe by DSSAT model, interesting results were achieved. Although some deviations between observed and simulated parameters appeared, the model was able to mimic characteristic crop growth dynamics. One of the main shortcomings is that model is not able to simulate necrosis of leaves within winter period. On the other hand, the model was able to reproduce the effect of different climatic conditions within included locations (i.e. later onset of observed phenophases within cooler station with higher elevation etc.) and the parameters were estimated with higher accuracy at Domanínek station.
Testování a validace aktuátorů turbodmychadel
Bílek, Tomáš
This diploma thesis is focused on testing and validation of turbocharger actuators. At first was clarified the basic definitions and knowledge about turbocharger actuator design, validation process, purpose of vibration and heat stress of turbocharger actuators in real life. In the next part of thesis the process of vibrational, heat testing and evaluations of measured data and their influence on actuator development was mapped. Part of thesis is also suggestion of innovations in test process of vibrational and heat testing of turbocharger actuators design.
Graphical Interface for the NetLoiter
Ščupák, Marian ; Smrčka, Aleš (referee) ; Rozsíval, Michal (advisor)
The aim of this work is to create a graphical user interface that simplifies working with the NetLoiter tool. The chosen form for implementing the user interface is a web application. The created user interface allows the user to fill out forms, which validate their input and convert it into configuration files. The generated configurations can be used to run the NetLoiter tool via the SSH protocol and subsequently monitor the output in a user-friendly manner in real-time. The interface also provides users with the ability to perform basic statistical analyses on the data generated by the NetLoiter tool. The result of the work is increased efficiency in managing the NetLoiter tool and easier interpretation of its outputs.
Modelling and Simulation of the Longitudinal Flight Control
Zavadil, Dominik ; Jalovecký, Rudolf (referee) ; Jirgl, Miroslav (advisor)
This bachelor thesis focuses on the design of a longitudinal flight model of an aircraft, identification of its parameters and validation of the obtained model. The theoretical part describes the modelling of longitudinal flight using equations of motion, which are then linearized and transformed into a state-space representation. In the practical part, data measured on a flight simulator were used to identify two models and for their subsequent validation. A joystick emulated by an Arduino Leonardo board was used to generate input signals in the process of acquiring the validation data. Finally, the validated models were used to build a simulation model that can be used to determine the response of the aircraft to different types of input signals.
Test Planning Tool Extension for Distributed Systems
Mészáros, Filip ; Ráb, Jaroslav (referee) ; Ščuglík, František (advisor)
This bachelor thesis is about automatical software testing using the testing scheduler. It describes creation of the extension for the existing testing scheduler, so it will be possible to split effectively a group of tests to segments, that will be executed independently on each other. Tests are splitted according to the common characteristics of the enviroment, that need to be prepared for each test, and according to the dependencies between the tests. Furthermore, it describes what optimizations are used for splitting of the tests to subsets. Each subset of the tests runs on a standalone testing system, so the time needed for succesful completion of testing with the given set of tests is reduced. Created tool is succesfully used during everyday testing of the several products in the Acision company, to which was this tool made.
Calculation of vehicle aerodynamic characteristics under yaw conditions
Fojtů, Kevin ; Čavoj, Ondřej (referee) ; Vančura, Jan (advisor)
The diploma thesis focuses on CFD simulation of a vehicle with various geometric modifications and non-zero angle flow. The goal of the work is to evaluate the effect of crosswinds for individual vehicle modifications together with the validation of these data sets with measured data from the wind tunnel. The last part of the thesis contains analysis of the flow field.
Determination of selected mycotoxins in tea
Pustka, Václav ; Maleček, Miroslav (referee) ; Kuchyňa, Jaroslav (advisor)
This diploma thesis deals with the development and validation of an analytical method using high performance liquid chromatography method with fluorescence detection for the simultaneous determination of aflatoxins and ochratoxin A in herbal and fruit tea. The theoretical part describes the most common groups of mycotoxins and the most important methods for their determination in food. The great attention is devoted to HPLC method and the overview of the derivatization techniques for aflatoxins B1 and G1 fluorescence response enhancement. The practical part of this study focuses on the optimization of sample extraction and purification, the settings of the instrumental analysis and the photochemical reactor assembly. The thesis also involves the determination of the basic performance characteristics for the successful method validation.
PWR fuel assembly model
Cekl, Jakub ; Novotný, Filip (referee) ; Vojáčková, Jitka (advisor)
PWR, fuel assembly, benchmark, burnup, lattice, SCALE, Polaris, validation, reactivity
Front Wing for Formula Student
Vrubel, Vít ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
This work deals with the verification of the design of the front wing on the Formula Student car. The work is divided into three parts. In the first, a search of the wings used in the Formula Student competition is performed. The second part is devoted to the experiment and the last part is devoted to CFD calculations and comparisons with measured values. Computations were done on computational resources supplied by the project „e-Infrastruktura CZ“ (e-INFRA LM2018140) provided within the program Projects of Large Research, Development and Innovations Infrastructures. Computational resources were provided by the ELIXIR-CZ project (LM2015047), part of the international ELIXIR infrastructure.

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