• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 149
  • 51
  • 5
  • Tagged with
  • 206
  • 190
  • 21
  • 18
  • 18
  • 16
  • 15
  • 14
  • 14
  • 14
  • 13
  • 13
  • 11
  • 10
  • 10
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
201

Řešení spojitých systémů evolučními výpočetními technikami / Solution of Continuous Systems by Evolutionary Computational Techniques

Lang, Stanislav January 2018 (has links)
The thesis deals the issue of solution of continuous systems by evolutionary computational techniques. Evolutionary computing techniques fall into the field of softcomputing, an advanced metaheuristics optimization that is becoming more and more a method of solving complicated optimization problems with the gradual increase in computing performance of computers. The solution of continuous systems, or the synthesis of continuous control circuits, is one of the areas where these advanced algorithms find their application. When dealing with continuous systems we will focus on regulatory issues. Evolutionary computing can then become a tool not only for optimization of controller parameters but also to design its structure. Various algorithms (genetic algorithm, differential evolution, etc.) can be used to optimize the parameters of the controller, for the design of the controller structurewe usually encounter so called grammatical evolution. However, the use of grammatical evolution is not necessary if appropriate coding is used, as suggested in the presented thesis. The thesis presents a method of designing the structure and parameters of a general linear controller using the genetic algorithm. A general linear regulator is known also as so called polynomial controller, if we encounter the polynomial theory of control. The method of encoding the description of the general linear controller into the genetic chain is crucial, it determines a set of algorithms that are usable for optimization and influence the efficiency of the calculations. Described coding, effective EVT implementation, including multi-criteria optimization, is a key benefit of this work.
202

Adaptivní kmitočtový filtr / Adaptive frequency filter

Kříž, Petr January 2010 (has links)
The aim of this work is to design a filter of the type low–pass of order 5th with Butterworth’s approximation in the range of over-tuning 10 – 100 kHz and if it will be possible so! achieve even higher marginal frequencies. To compare two typical representatives of the frequency filters cascading and non-cascading synthesis from the viewpoint the accuracy of an! approximation function, sensitivity to the tolerance values of components, number of the components (mainly OZ) and viability, especially the possibility of electronic over-tuning in selected frequency range. On the basis of these conditions will be chosen one design, which will be realized later. Further it will be necessary to consider the possibilities of electronic over-tuning and to choose for this over-tuning suitable component, to design user management changes of marginal frequency fm by the help of keyboard + LCD and control application on the PC. For this hardware will be programmed appropriate control software. At the end of this work will be constructed appropriate device, which fullfils requirements written above and will be subjected to the laboratory measurements that verify function of this device. The constructional details of the filter are presented in the enclosure at the end of this work. At the CD are available all materials, which were created during the master’s thesis or which are necessarily concerned.
203

Algoritmy zpracování signálu na platformě AVR32 / Signal processing algorithms on AVR32 platform

Záplata, Filip January 2011 (has links)
Master‘s thesis reviews the characteristics of the AVR32 architecture, AVR32UC microarchitecture, and especially AT32UC3A0512 microcontroller. This microcontroller is mounted on the board EVK1100, which is used for debugging applications. The entire analysis is focused on the ability to process audio signals on this board. For the board is created AD/DA interface and its control library. Follows necessary description of used DSP-lib library. The last part is a description of the theory and implementation of two sound effects and implementation of operating system FreeRTOS.
204

Grafické intro 64kB s použitím OpenGL / Graphics Intro 64kB Using OpenGL

Geršl, Jan January 2008 (has links)
The field of this project is size restricted graphic intro. The paper deals with motivation creating such an intro and talks briefly about history. Main focus is put on general description of various principles common in demo development, techiques used achieving the practical assignment are provided with more detailed description.
205

Aktivní kmitočtové filtry pro vyšší frekvence / Active Frequency Filters for Higher Frequencies

Fröhlich, Lubomír January 2014 (has links)
This thesis deals with the synthesis and optimization of frequency analogue filters with modern active elements usable for higher frequencies. The thesis is divided into three parts, the first part deals with the problematic concerning Leap-Frog combined ARC structure. Due to a difficult design, this method is not described in a detail and used in practice, although it shows e.g. low sensitivity. Firstly, a complete analysis of individual filters was made (for and T endings) and consequently these findings were used during implementation of this method to NAF program. Finally, samples of real filters were realized (for verification of functioning and correct design). Another very interesting topic concerning filters is usage of coupled band-pass for small bandwidth, where it is necessary to solve the problems concerning ratio of building elements values, but also price, quality, size of coils, sensitivity, Q factors, coefficients etc. That is why in practice a coil is very often substituted with other equivalent lossy and lossless blocks which create ARC filters structure. The design and the possibility of usage of lossy grounded elements were described here (such as synthetic inductors, frequency dependent negative resistor). Some parts of the design are individual computer sensitivity analysis, setting of usage and quality comparison of individual lossy grounded blocks. Besides, a program for these elements was created, it is useful for a quick design and depiction of transfer characteristics. The third part deals with the usage of tuning universal filters consisting three or more operational amplifiers, which secures its universality and possibility to create different kinds of transfer characteristic. In practice, Akerberg - Mossberg and Kerwin - Huelsman - Newcomb are the most used types of filters. These were also compared with less common universal filters. In the end, the possibility of digital tuning of universal filter with the help of digital potentiometers for filters of 10th order and frequency around 1 MHz was shown.
206

Program českého dekadentního hnutí a otázka intertextuality. Dílo Miloše Martena / Program of the Czech Decadent Movement and the Question of Intertextuality. Tho Work of Miloš Marten

Kantoříková, Jana January 2018 (has links)
The Program of the Czech Decadent Movement and the Question of Intertextuality. The Work of Miloš Marten This thesis explores the work of Miloš Marten (1883-1917) seeking to analyse its decadent narrative as a modern narrative that brings into play the unity between the pinnacle and the decline. It departs from the comparison between the style and interpretation of the two versions of Cyklus rozkoše a smrti (orig. The Cycle of delight and death; 1907 and 1917/1925) and the study of the realisations of this work. For this purpose the study contextually examines the conceptions of "intertextuality" from fin de siècle authors-critics, meaning their conceptualisations of similarity and/or identity of literary works which frequently involve a confluence of degeneration theory, the argument of the non-ethical nature of plagiarism and theory of decadence. All were often used as instruments of disqualification as well as justifications for a modern aesthetics and style. Reconstitution of Marten's theoretical reflection on artistic genres evidences his research of a harmonizing modern culture within an anti-syncretic tendency: mythology and revolt against myth Order being shifted to tragedy and parable, while the novel is designed as an analytical-critical synthesis. Applying contemporary approaches to...

Page generated in 0.037 seconds