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Impulse noise detection in audio signals
Hůla, Josef ; Ištvánek, Matěj (referee) ; Mokrý, Ondřej (advisor)
Study disserts known method of detecting impulsive noise in audiosignal. Differential, filtering, autoregressive and ARMA methods are discussed. First, each method is theoretically examined and the character of impulsive disturbances is presented. Later an~implementation of each method is presented and results of their performance is compared. In order to have comparable results, the methods are tested on synthetic impulses with known position and duration and also on recordings containing real impulsive noise.
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Impulse noise detection in audio signals
Hůla, Josef ; Ištvánek, Matěj (referee) ; Mokrý, Ondřej (advisor)
Study disserts known method of detecting impulsive noise in audiosignal. Differential, filtering, autoregressive and ARMA methods are discussed. First, each method is theoretically examined and the character of impulsive disturbances is presented. Later an~implementation of each method is presented and results of their performance is compared. In order to have comparable results, the methods are tested on synthetic impulses with known position and duration and also on recordings containing real impulsive noise.
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Comparison of methods for measuring the tension force of the tractor during soil tillage.
Buřič, Milan ; Novák, Petr (advisor) ; Hůla, Josef (referee)
The theoretical part of the diploma thesis deals with soil qualities which influence the soil processing. The soil processing itself is described in the theoretical part as well as advantages and disadvantages of the specific processing, a choice of technology for effective soil processing and economic aspects of the processing. In this part there is an extract describing a test of a tractor pulling and reasons for making the test of pulling in laboratory and field conditions. The practical part of the thesis deals compares two methods of a tractor pulling power during field tests. A belt tractor John Deere 8320 RT and a wheel tractor New Holland T7050 were tested. The target of a pulling test in ter-rain was to define which resistance makes a soil in specific conditions and which pulling power is needed for a certain working output on a given land. The results were pro-cessed and evaluated with computer technology. The whole measurement took place with support of a BEDNAR FMT company.
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Functional properties of tillers working tools
Hamouz, Karel ; Hůla, Josef (advisor) ; Novák, Petr (referee)
This theses provides an overview of tillers´ working tools used in current tillage technologies for soil loosening to varying depths. A more detailed overview was made to describe current solutions for the design of tillers for shallow and medium depths. Literary insights into the quality of work and energy requirements of tillers´ working tools are presented. The work also includes the results of field measurement of draught force and quality evaluation of the work of three selected prototypes of chisel tines. This results were used to find out the relationship between specific draught and soil-aggregate size distribution on different widths of chisels and their working depth. For all widths of tines, a significant growth in specific draught was found with increasing working depth. The specific draught significantly correlated with the cross-section area of the loosened soil (correlation coefficient 0,808).
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Machines movement rationalisation on the chosen field
Bauer, Adam ; Hůla, Josef (advisor) ; Novák, Petr (referee)
The aim of this thesis is the description of the methods that lead to the rationalization of the machine systems around due to reduction of negative impacts on soil and improve machine productivity. The introduction describes the importance of modern agricultural machinery being so much used as it´s possible, because machines performance is still higher, but in conjunction with the power the acquisition and operating cost grow too, so it is important to minimize machine idle time. The literature review describes the importance of correct choice of the direction of the tram lines, methods of soil-saving technologies, especially technologies controlled traffic farming (CTF), there are also described the satellite navigation, which is a basic prerequisite for CTF technology. Next chapter is about the rationalization of technological process of oilseed rape producing. The experimental part is focused on the comparison of present style of machines moving in oilseed rape production with rides designed by software OptiTrail. Time savings are expressed using of the unit costs. The conclusion summarizes the results and give recommendations.
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