|
|
Automatic detection of ischemia in ECG
Noremberczyk, Adam ; Potočňák, Tomáš (referee) ; Ronzhina, Marina (advisor)
This thesis discusses the utilization of the artificial neural networks (ANN) for detection of coronary artery disease (CAD) in frequency area. The first part of this thesis is orientated towards the theoretical knowledge. Describes the issue of ECG pathological changes. ECQ are converted to frequency area. Described statistical methods and methods for automatic detection of CAD and MI. Explained the issue of the perceptron and ANN. The second deals with use of Neural Network Toolbox MATLAB®. This part focuses on counting and finding suitable parameters and making connection of band. At the end of the thesis UNS is used to detect ischemic parameters and the results are discussed. Average values for the best settings are 100% accuracy.
|
|
|
Power line transfer function generator
Vlček, Josef ; Martinásek, Zdeněk (referee) ; Mlýnek, Petr (advisor)
This bachelor's thesis deals with data communication over powerline (PLC). It describes the PLC technology, its basic division, the current opportunity to use, the sources of interference and the types of modulation. It analyzes the basic parameters of transmission line by means of which it is possible to create the equivalent transmission line model in two different ways either the mathematical model with multipath propagation or by using two-port with cascade parameters. The practical part contains measurement transfer function on different topologies. The measured values are compared with the numerical models. Furthermore, the transfer function generator was created which simulates the properties real distribution network.
|
|
|
Design and analysis of electronically reconfigurable filtering structures
Kříčka, Tomáš ; Dvořák, Jan (referee) ; Langhammer, Lukáš (advisor)
This bachelor thesis deals with the proposal of analog filters with the ability of the electronic reconfiguration. The main aim was to propose three fully electronically reconfigurable filters using different methods. The work focuses on the use of modern active elements that ensure the electronic reconfiguration. Specifically on operational transconductivity amplifiers, second-generation current conveyors and current amplifiers. The transfer functions are simulated in the Orcad PSpice software, at the ideal and behavioral level. Sensitivity and parasitic analysis is applied to the two proposed filtration structures. Both structures are made on printed circuit boards, which are measured and then their transfer functions are compared with the simulated functions.
|
|
|
Power line communication modelling in Network Simulator-3
Horák, Martin ; Zeman, Václav (referee) ; Mlýnek, Petr (advisor)
The diploma thesis deals with the issue of data transmission over power lines, focusing on simulation transmission functions. The theoretical part summarizes basic information on PLC technology and distribution networks, followed by analysis PLC simulator implemented in NS-third In the practical part of the thesis is described implementation of individual types of underground and overhead lines to the PLC simulator. Also been carried simulation scenarios for a simple topology and were designed own simulation scenarios for extended topology and simulations have been carried out various kinds of interference on communication.
|
|
| |
|
|
Fraunhofer diffraction by identical objects of the same orientation
Prokop, David ; Bouchal, Petr (referee) ; Komrska, Jiří (advisor)
The bachelor's thesis deals with Fraunhofer diffraction by identical objects of the same orientation. Main objective of my thesis is description of Fraunhofer diffraction for three different arrangements of holes along a straight line. In next part, the problem of random distribution of holes along straight line is set into plane. The outcome of my thesis is determination of deviations from regular array of holes. Next part of my thesis includes a description of Fraunhofer diffraction experiment. In final part of my thesis are pictures of diffraction phenomena, to illustrate results obtained from model of random distribution of holes.
|
|
|
Design of Reverberator for Room Acoustics Simulation
Húserka, Jozef ; Orlovský, Kristián (referee) ; Kurc, David (advisor)
This thesis deals with artificial simulation of acoustic spaces by using reverberators. Output of this document consists of four reverberation algorithms and function that evaluates objective parameters of acoustic space from impulse responses. Reverberators and script were implemented using Matlab. Graphical user interface is used to present all of the algorithms for easier usability. First chapter deals with objective parameters of acoustic spaces and the ways they are computed from impulse response. Second chapter describes various structures which are used to build reverberators. Those structures are used in third chapter in implementations of reverberators. Third chapter also compares all implemented reverberators . In last chapter experiment was made. Impulse responses of three spaces were measured and subsequently aproximated by algorithms implemented in this thesis.
|
|
|
Active frequency filter using current mode
Paščinský, Jiří ; Dostál, Tomáš (referee) ; Slezák, Josef (advisor)
The aim of this work is design of frequency filter working in current mode. The introduction of the work deals with features and applications of frequency filters. Special attention is paid to the transfer function of the filter. In third chapter different operational modes of electrical circuits and their advantages and disadvantages are discussed. Attention is paid to active blocks suitable for circuits working in current mode. There is description of components AD844 and EL2082 which represent current conveyors of the second generation and are used in the designed filter. The last two chapters deal with design of component values of the frequency filter. The designed circuit was simulated in PSpice and the results were compared with measurments. Also sensitivity and tolerance analysis of the filter were performed.
|
|
|
Impedance Tube for Measuring Sound Absorption Coefficient
Raška, Adam ; Sysel, Petr (referee) ; Schimmel, Jiří (advisor)
This thesis, consists of summering basic knowledge about absorption factor, methods for its measuring and construction of impedance tube for measuring with chosen method. Besides that, this thesis i salso about measuring absorbtion factor of available materials in this tube, and proposing laboratory task about absorbtion factor measurement, which should use crafted measuring equipment.
|
|
|
Computer support realization of symbolic models in MATLAB
Valová, Alena ; Věchet, Stanislav (referee) ; Březina, Tomáš (advisor)
The aim of the bachelor's thesis is description of the functions tf (transfer function), ss (state space) and ss2ss (similarity transformation) that occurs in the programming language Matlab in the Control System Toolbox, and their subsequent implementation in the environment of programming language Matlab using the Symbolic Math Toolbox. This thesis is focused to implementation of algorithms that can solve these functions symbolically. By connection and reunification programs, functions can be converted from one form to another. The library is useful for teaching automation.
|
guest ::
