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Implementation of restoring method for reading bar code
Kadlčík, Libor ; Bartušek, Karel (referee) ; Mikulka, Jan (advisor)
Bar code stores information in the form of series of bars and gaps with various widths, and therefore can be considered as an example of bilevel (square) signal. Magnetic bar codes are created by applying slightly ferromagnetic material to a substrate. Sensing is done by reading oscillator, whose frequency is modulated by presence of the mentioned ferromagnetic material. Signal from the oscillator is then subjected to frequency demodulation. Due to temperature drift of the reading oscillator, the demodulated signal is accompanied by DC drift. Method for removal of the drift is introduced. Also, drift-insensitive detection of presence of a bar code is described. Reading bar codes is complicated by convolutional distortion, which is result of spatially dispersed sensitivity of the sensor. Effect of the convolutional distortion is analogous to low-pass filtering, causing edges to be smoothed and overlapped, and making their detection difficult. Characteristics of convolutional distortion can be summarized into point-spread function (PSF). In case of magnetic bar codes, the shape of the PSF can be known in advance, but not its width of DC transfer. Methods for estimation of these parameters are discussed. The signal needs to be reconstructed (into original bilevel form) before decoding can take place. Variational methods provide effective way. Their core idea is to reformulate reconstruction as an optimization problem of functional minimization. The functional can be extended by other functionals (regularizations) in order to considerably improve results of reconstruction. Principle of variational methods will be shown, including examples of use of various regularizations. All algorithm and methods (including frequency demodulation of signal from reading oscillator) are digital. They are implemented as a program for a microcontroller from the PIC32 family, which offers high computing power, so that even blind deconvolution (when the real PSF also needs to be found) can be finished in a few seconds. The microcontroller is part of magnetic bar code reader, whose hardware allows the read information to be transferred to personal computer via the PS/2 interface or USB (by emulating key presses on virtual keyboard), or shown on display.
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Design patterns in PHP
Havel, Jan ; Pecinovský, Rudolf (advisor) ; Ristič, Marko (referee)
The aim of this bachelor thesis is to give a basic overview of the areas of support objectoriented programming and design patterns in the context of the programming language PHP. This bachelor thesis includes recherché part with summary of the historic support of objectoriented programming in programming language PHP and a summary of the development and importance of design patterns. Moreover, a handbook with selected design patterns, which are useful in this programming language, was created in another part of the work. Selected design patterns in handbook are amend with sample codes on implementation of simple and cogent situations which facilitate the understanding of the pattern. In conclusion, there is a section that contains recommendations for modification of introductory courses in programming in programming language PHP at the University of Economics.
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System for Remote Monitoring of Electrical Values
Kvasnička, Pavel ; Kněžík, Jan (referee) ; Drahanský, Martin (advisor)
The work deals with the measurement of electrical quantities, distribution of data across the Ethernet network into the Internet and intelligent selection of the required values to be transmitted and stored on a central node. The work describes the communication protocols in scale that is necessary for implementation, discussed the requirements for computational resources and microcontroller control is proposed by flowcharts. Attached are source codes in C programming language for microcontroller and PHP scripts for storing and presenting data on Web server.
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Uživatelsky orientovaný jazyk pro řešení úloh DZD
Kováč, Michal ; Mrázová, Iveta (referee) ; Rauch, Jan (advisor)
The thesis discusses a new visual functional programming language and its use for data mining. The language is called Ferda and forms an integral part of the Ferda system, which is an application that has been created for data mining with the GUHA method. Functions of the language are represented by boxes. The source code is written as a connection of boxes; source files are project files of the Ferda system. The thesis describes the status of the Ferda system before this work from the point of view of the visual programming and describes possible enhancements to source files, then it presents a new basic set of boxes for the Ferda language and proposes other possible extensions of the language. Some of these proposals have been implemented as a part of this thesis. The last part includes examples of the use of the new language for data mining. One of these has also been implemented as a part of this thesis.
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Online LaTeX Editor
Sokol, Miroslav ; Šolony, Marek (referee) ; Kajan, Rudolf (advisor)
This diploma thesis has its purpose in creating such an editor of LATEX language, which would succeed in the competition of existing solutions. To offer users a basis typical for this type of editors and add functions that will make him a unique project. The progress went in a direction of transparent environment and completely trivial operating. Most of the functions are available through 1 click only. Predefined templates are displayed immediately including previews and it is possible to download them with all source codes. Some kinds of actions redraw the whole content of the page. In other cases, we used update panels for partially redraw the content or client javascript. Due to available archivation of .zip files we can even process more files at the same time. Program is designed in a way to be able to further continue developing it and even broaden his features.
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FFT implementation in FPGA and ASIC
Dvořák, Vojtěch ; Bohrn, Marek (referee) ; Fujcik, Lukáš (advisor)
The aim of this thesis is to design the implementation of fast Fourier transform algorithm, which can be used in FPGA or ASIC circuits. Implementation will be done in Matlab and then this form of implementation will be used as a reference model for implementation of fast Fourier transform algorithm in VHDL. To verify the correctness ofdesign verification enviroment will be created and verification process wil be done. Program that will generate source code for various parameters of the module performing a fast Fourier transform will be created in the last part of this thesis.
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Processing of accounting data within the scope of the economical information systém JBA Explorer in joint-stock company
TENDEROVÁ, Renata
The aim of this Bachelor thesis is to consider the options of data processing within the scope of the economic information system focused on the bookkeeping of stock reserves and records, and to analyze the problems occurring when processing data by means of the economic information system S21. The theoretical part defines the S21 system, the method of processing data into the accounting books by means of the Finance integrator AFI, and the system of bookkeeping according to the Czech accounting standards. In the practical part I enumerate several methods of data acquisition including the sample receipts, a query for an actual stock motion of an item with a record in the main accounting book. It comes to further data processing when closing the stores by the control of set Value of stock motions, correctness of motions with the types of movement and codes of reason and transfer completion. The integral part of the practical section is the intranet, its characteristic and application in data processing. Intranet is an appropriate instrument for stocktaking. It offers several sets for announcing stocktaking, saving the registered state and printing the stocktaking list, setting the ascertained physical state or differences, the comparison of recorded and ascertained state, the overview of differential stock motions and the end of stocktaking. In the closing part there are stated the advantages and drawbacks of the programme and the recommendations for companies.
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Framework for test creating
Havelka, Jakub ; Červenák, Rastislav (referee) ; Lattenberg, Ivo (advisor)
This thesis deals with the topic WPF application framework for creating tests in the .NET Framework. source codes are written in Cd#. The first part deals with the theoretical description of the development of the .NET Framework, and the second part deals with the practical implementation of the award .
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Simulation of OLSR routing protocol in OPNET Modeler environment
Potfay, Attila ; Růčka, Lukáš (referee) ; Vajsar, Pavel (advisor)
The main task of this bachelor's thesis is to simulate the routing protocol OLSR (Optimized Link State Routing Protocol) in the OPNET Modeler environment, and to realize a scenario where it is possible to model protocol functionality and properties. The processing of each simulation is divided into three main parts and they are the description of a situation, configuration and the evaluation of results. In the first scenario there is shown the functionality of the protocol, in the second simulation there are scenarios with the nodes of different movement speed, and in the third simulation the energy requirements of the protocol from the perspective of quantity of the transmitted packets are evaluated. Furthermore, in this thesis there is analyzed the way of implementing the routing protocol OLSR in the OPNET Modeler environment. The implementation structure is divided into three levels: the level of a node, a manager and the routing protocol. At these levels the process models, transitions, code blocks, variables and key codes of functions are processed. Next, there is introduced the possibility of extending the protocol. In order to extent the OLSR protocol, the work focused on supporting services quality. The functions are edited for the protocol to create logs, read out the current transfer speed from the statistics, add it to the created pool and organise writing the logs. The results are evaluated and clearly described. This work provides the theoretical basics: it deals with the primary characteristics of Mobile Ad-hoc networks (MANET), describes in detail the OLSR routing protocol and provides information about the OPNET Modeler simulation environment.
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