National Repository of Grey Literature 57 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Stock Selection by Techical Analysis
Netušil, Petr ; Polách, Petr (referee) ; Sojka, Zdeněk (advisor)
This bachelor thesis is engaged in stock selection to portfolio with the help of technical analysis. In accordance with this aim the whole thesis is being structured, while at the beginning there are theoretical resources concerning exchange system mentioned, as well as basic methodology of technical analysis. These methods are further transferred into practical examples in the second part. This thesis thus describes possibilities of technical analysis in conditions of capital markets.
Experimental study of fluid-induced instabilities in journal bearings
Stifter, Jan ; Polach, Pavel (referee) ; Omasta, Milan (advisor)
Presented diploma thesis deals with experimental study of fluid induced instabilities which occur in rotating machinery with journal bearings. The first part describes the oil whirl and oil whip instabilities. It also gives an example of optical methods used for observation of journal bearings. Next part is dedicated to modifications of an existing test rig that were necessary for carrying out experiments. Finally, there are presented results of experiments that define the effect of initial conditions on appearance of instabilities.
Performance of top-of-rail products in railway
Jordán, Tomáš ; Polach, Pavel (referee) ; Galas, Radovan (advisor)
Presented master’s thesis deals with a development of methodology of the top-of-rail products performance in railway with use of the real rail. The performance parameters are adhesion development with carry distance, carry distance, friction layer retentivity and product redistribution. The top-of-rail products are used to reduction of wear and noise pollution in railway. Currently used methodology in laboratory cause model distortion and unreal friction layer. Field experiments are affected by environmental conditions. As a main part of this thesis was developing of the methodology for the performance parameters study. The methodology was experimentally tested with four commercial products. An obtained knowledge was presented and discussed. As a part of the methodology was studied running-in of real rail. For measuring of shear friction on the top-of-rail was designed and realized a tribometer. The output of this work is functional sample of the tribometer and a manuscript dealing with the designed methodology.
Expert system NPS
Plch, Miroslav ; Polách, Petr (referee) ; Jirsík, Václav (advisor)
The bachelor thesis deals with the suggestion to set a knowledge base for an expert system. Knowledge base is made for the topic of vibrations and sounds inside an automobile. The solution is based on a diagnostic expert system NPS32. The base that is produced can be used to identify the most frequent automobile defects.
Proposal of Part of Information System for Selected Subject
Langer, Tomáš ; Polách, Pavel (referee) ; Luhan, Jan (advisor)
This thesis deals with the analysis, proposal and implementation of part of the information system for a selected subject, specifically the proposal of a website including a web application for content management of selected parts of the website. For a successful proposal solution it is very important the first analysis together with requirements of the contracting authority. The graphic design phase occurs after analysis and is followed by the development of the website and the application for content management. After testing and agreement of the proposal solution from the contracting authority the website and application are implemented to the server site. In the final part of the thesis an economic evaluation and benefit’s analysis of the proposal solution are done.
Top of rail lubricant development
Skurka, Šimon ; Polach, Pavel (referee) ; Kvarda, Daniel (advisor)
Friction modification within the wheel-rail interface is an important way of achieving ecologically friendly transportation of both persons and goods. This thesis aims to develop a new TOR lubricant, which will be able to maintain suitable frictional conditions while securing minimal adhesion required for traction. All measurements were carried out on tribometer MTM in the ball-on-disc configuration. In the first step, individual components were examined. More complex compositions were measured after that and the three best of them were compared with commercial TOR lubricants. The results show a good ability of developed compositions to maintain required adhesion, reduce wear, and all of them had resistivity against over-lubrication. Lastly, the process of lubricant verification before its application in real traffic was discussed.
Training system for clibmers
Polach, Pavel ; Sekora, Jiří (referee) ; Bubník, Karel (advisor)
The purpose of this diploma thesis was design and realisation of measuring system, enabling measuring forces between climber´s feet and holds on the climbing wall and using this measu-red values during a training of sport climber. In this thesis there are discovered possibilities about constructing this system and determina-ted basic requirements of measuring. There are also stated principles of application the strain gauges for measuring the tension. Descriptions of developping specific sensors, hardware interface and PC application are also part of this thesis. Constructed system was used for mea-suring climbers and values were analysed by using the application.
Voice recognition of standard PILOT-CONTROLLER control commands
Kufa, Tomáš ; Polách, Petr (referee) ; Honzík, Petr (advisor)
The subject of this graduation thesis is an application of speech recognition into ATC commands. The selection of methods and approaches to automatic recognition of ATC commands rises from detailed air traffic studies. By the reason that there is not any definite solution in such extensive field like speech recognition, this diploma work is focused just on speech recognizer based on comparison with templates (DTW). This recognizor is in this thesis realized and compared with freely accessible HTK system from Cambrige University based on statistic methods making use of Hidden Markov models. The usage propriety of both methods is verified by practical testing and results evaluation.
Sanitary technical installations and gas pipeline in the apartment house
Polách, Petr ; Wierzbická, Helena (referee) ; Vaščáková, Alena (advisor)
The bachelor's thesis deals with the design of sanitary technical installations and a gas installations in an apartment house and with their connection to existing engineering networks. It also includes a design of a wastewater pumping facility to protect the underground rooms from the sewage flooding. It also includes a proposal for a light liquid separator, infiltration device and rainwater tank. The theoretical part is focused on gas main, fittings in gas distribution, gas pressure regulator and gas meters. Calculation and project part solves distribution of sewerage, water supply and gas pipeline in the specified object. It is a basement building with three aboveground floors and usable attic. On the ground floor of the apartment house there is a café.
Evolutionary algorithms
Haupt, Daniel ; Polách, Petr (referee) ; Honzík, Petr (advisor)
The first part of this work deals with the optimization and evolutionary algorithms which are used as a tool to solve complex optimization problems. The discussed algorithms are Differential Evolution, Genetic Algorithm, Simulated Annealing and deterministic non-evolutionary algorithm Taboo Search.. Consequently the discussion is held on the issue of testing the optimization algorithms through the use of the test function gallery and comparison solution all algorithms on Travelling salesman problem. In the second part of this work all above mentioned optimization algorithms are tested on 11 test functions and on three models of placement cities in Travelling salesman problem. Firstly, the experiments are carried out with unlimited number of accesses to the fitness function and secondly with limited number of accesses to the fitness function. All the data are processed statistically and graphically.

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5 Polach, Pavel
5 Polách, Pavel
10 Polách, Petr
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