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Wireless Fidelity Networks
Jäger, Vítězslav ; Plchot, Oldřich (referee) ; Koch, Miloš (advisor)
Purpose of my Bachelor‘s thesis is to inform about general problems of wireless networks. My work is giving overview about using standards. It Analyzes the most common of them and focuses on their architecture and safety. Part of my work will be a creation of the wireless network for needs of a high school.
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The suitable neural network topology design for object recognition in the grass.
Polívka, Tomáš ; Pavlíček, Josef (advisor) ; Hanzlík, Petr (referee)
This thesis describes testing of artificial neural network depending on learning set for object recognition in grass. Values of experimenting with different topologies in Neuroph Studio were recorded. Testing was conducted on three sets of learning basic shapes. Verification of the ability of learning networks were tested using four basic shapes captured in the grass (square, rectangle, circle and triangle). When evaluating the most appropriate topology was defined by two main criteria. Number of successful recognition of shapes and distribution by recognized shapes.
The theoretical part describes the functionality and features of neural networks, image recognition using edge detection and existing applications for recognition of plant species.
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Source Apportionment of Atmospheric Aersol Using by Highly Time Resolved Characterization.
Pokorná, Petra ; Hovorka, J. ; Klán, M. ; Křůmal, Kamil ; Mikuška, Pavel ; Hopke, P.K. ; Ždímal, Vladimír
The effective air quality management in the heavy polluted areas has to be based on high-quality monitoring with properly designed monitoring network and targeted measurements, which provided information required to source apportionment. The study aim was to apportion sources of atmospheric aerosol based on highly time resolved data of mass concentration of size segregated aerosol, its spatial variability, elemental composition and OC/EC at three localities in the Czech Republic in the years 2008 – 2010, 2012, 2013. According to the size fractions ratio arose the importance of PM1 source apportionment because of PM0.15-1.15 mean ratio to PM10, which comprised 85 % at the monitoring localities primarily in winter. The main sources of coarse fraction in winter were coal and biomass combustion in Březno by Chomutuv a Mladá Boleslav and road dust re-suspension in Ostrava-Ravanice and Bartovice. In summer dominated soil re-suspension and primary biological – bioaerosol in Březno by Chomutuv. The dominated source of fine fraction was in winter coal combustion Ostrava-Ravanice and Bartovice and biomass burning in Mladá Boleslav. From the above mentioned results arose, that the highly time resolved data are suitable for source identification of size segregated atmospheric aerosol and enable to evaluate representativeness of monitoring station location and measurement campaign.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_22317041913030 - PDF
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Wireless Sensor Network Simulation Model in J-Sim Tool
Vrzal, Tomáš ; Morávek, Patrik (referee) ; Šimek, Milan (advisor)
This thesis deals with the issue of wireless sensor networks and communication protocols. Is explained of what the network is composed, what standards are used and in what sectors are most often used. The main scope of work is to introduce with the localization algorithms using in WSN. Algorithms are clearly divided into groups according to the methods used. In work is describes the structure used simulation tools J-Sim, for creating a wireless sensor network. To create network will be then applied different localization algorithms, which must first be implemented in a simulator using Java code. All generated classes and the algorithms are detailed described in the work. Results from simulations are detailed and graphically displays for individual localization algorithms.
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Project to extend water and sewer in the village Brandýsek
Petrová, Michaela ; Synáčková, Marcela (advisor) ; Renata, Renata (referee)
The thesis deals with the project phase of utility services within newly built family homes.
Special attention is paid to the construction of sanitary sewers, water mains and rain water management in urban areas in context of the current legislation. The paper is divided into theoretical and practical part.
The first part focuses on the means and facilities of utility services and on legislation regarding their proposed design and subsequent implementation. The second part concentrates on the construction of particularly selected networks in a specific project. It involves the emerge of new locations within undeveloped areas that closely adjoin the existing community. In this area we find not only a proposed sewerage treatment for wastewater but also water lines for the newly formed 14 building plots. Special attention is paid to the management of rainwater coming from public roads and sidewalks. The construction of the proposed utilities is economically evaluated in the budget costs calculated for building construction.
The conclusion of this paper concentrates on the newly formed building plots that have been pre-engineered for connection to the relevant utilities.
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SIP traffic analyzer
Šterbák, Ondrej ; Yaghob, Jakub (referee) ; Peterka, Jiří (advisor)
Session Initiation Protocol (SIP) is an application-layer control signaling protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls, multimedia distribution, and multimedia conferences. This document briefly describes overview of SIP and is discussing the solutions to different problems which happen when is SIP used in home environment. It is looking for the solutions to actual Internet drafts, which have not been approved yet. It also includes detailed guide for capturing SIP network communication by using libpcap format, design of analyzer of problems in this communication and its implementation in Perl programming language. Three sample SIP communications are captured - functional, partly functional and non-functional and the analyzer show its capabilities on them.
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Building and use of small computer networks
Fišer, Marek ; Pinkas, Otakar (advisor) ; Palovský, Radomír (referee)
The main objective of the thesis is description of the intermediation of internet services by the use of microwave transmission technology. The thesis is divided in three parts. The first part is dedicated to a theoretical description of metallic and wireless networks. The second part focuses on the problematic of microwave transmission. The third, the main part, is dedicated to the description of a specific solution. In this part is metioned the pratical experience, which was gained by the implementation of the solution in to the practice.
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The GPU Based Acceleration of Neural Networks
Šimíček, Ondřej ; Jaroš, Jiří (referee) ; Petrlík, Jiří (advisor)
The thesis deals with the acceleration of backpropagation neural networks using graphics chips. To solve this problem it was used the OpenCL technology that allows work with graphics chips from different manufacturers. The main goal was to accelerate the time-consuming learning process and classification process. The acceleration was achieved by training a large amount of neural networks simultaneously. The speed gain was used to find the best settings and topology of neural network for a given task using genetic algorithm.
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Program a kniha abstrakt
Ilavský, Michal ; Dušková, Miroslava
Proceedings of the 44th Microsymposium of Prague Meetings on Macromolecules contain abstracts of 42 lectures and over 100 posters that cover the areas of preparation and chemical modification of polymer gels and networks; gelation and network formation – experiment and theory; gel and network states of matter and gels in life sciences, technology and applications.
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Influence of Distributed Generation on Given Area of 22 kV Distribution Network
Samuel, Tomáš ; Bráblík, Libor (referee) ; Orságová, Jaroslava (advisor)
The Thesis deals with the current problem related to the connection of dispersive sources to the distribution network. The advantageous legislative support, however, gives a rapid rise to the sources of this kind. Current pricing philosophy favours in particular the growth of photovoltaic power plants. The introduction is aimed at the dispersive sources locating so as to give a comprehensive solution and better understanding of this issue. The equipments of this kind are located in accordance with legislation in force; however, it is necessary to formulate the possibilities of placing them from the view of rational use of the area with the aim of the public weal accordance of both public and private interests. Talking about connection of the new dispersive sources to the distribution network, it is important to mention the legislation, legal directives and regulations delimitating this kind of trade. This theme is the subject of another chapter of the work. Particular attention is paid to the regulation on conditions of connection to the distribution network. When connecting the sources to the distribution network the biggest technical problem from the view of electrical engineering is undesirable influence on the quality parameters (voltage) in this network. This is in particular the voltage change after connection, then, depending on the type of source, the emission of the current harmonic, sharp voltage change, etc. Considering current rise of the dispersive sources connected to the distribution network, more and more influence will appear in quantity parameters. For this reason there will be a lot of search for the methods of preventing from the negative influence on the network. From all of the above said reasons, the work is aimed at the operation analysis of the part of the distribution network, calculation of the network qualitative parameters and searching for the methods of negative influence rectification owing to switching processes of the distribution system. So as to determine the quantitative parameters we used the E-influence programme. Final paragraphs are devoted to the changes to come not only in legislation but, in general, in the approach of the distribution system operators not only to the ways of another connection of such sources but even the regulation of the dispersive sources already connected.
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