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Detection of QRS complex in experimental ECG data
Brandejs, Jakub ; Harabiš, Vratislav (referee) ; Vítek, Martin (advisor)
In this paper, called Bachelor thesis, I proposed a QRS complex detector based on wavelet transformation where biorthogonal wavelet bior1.5 was applied with use of Matlab. The detector works with antisymmetry of the wavelet to detect minimum/maximum or maximum/minimum pairs and singularity between them. Results of this detector were evaluated on the CSE database. The detector was reworked to be able to detect experimental QRS complexes.
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Detection of QRS complex in experimental ECG data
Bucsuházy, Kateřina ; Ronzhina, Marina (referee) ; Vítek, Martin (advisor)
This Bachelor work deals with QRS complex detection. The theoretical part of the presented work is focused on summary of selected methods of QRS complex detection. There is described in detail wavelet transform, which is used for realization of QRS complex detector in Matlab. Specifically is used redundant dyadic discrete wavelet transform and biorthogonal wavelet with odd symmetry bior1.5. The algorithm was evaluated on the standard CSE database. The detector was modified to be able to detect QRS complexes in experimental data.
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Mathematical models for incompressible non-newtonian fluids with non-monotone dependence of shear stress on shear rate
Perlácová, Tereza ; Průša, Vít (advisor) ; Málek, Josef (referee)
We investigate recently developed implicit constitutive theory and its implication into the modelling of fluids. We base the work on the literature search that is focused on the S-shaped shear stress-shear rate experimental data. The materials that exhibit such a behavior are found to be colloidal suspensions and surfactant solutions. The work summarizes microscopical theories explaining the shear-thickening, the shear-thinning and the shear-banding phenomena that arise in these materials. The theories reveal that the unusual behavior is due to the separation of the fluid into various bands in shear stress-controlled measurements. The extracted experimental data from the literature are fitted with several one-dimensional implicit type relations. Finally, we propose an example of a fully three-dimensional implicit constitutive relation with focus on the normal stress differences effect. The work demonstrates benefits of the implicit constitutive theory for modelling of complex fluids. 1
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Simple Equipment for Measurement of Total Pressure Tested on Poly(ethylene glycol) + Water System.
Pavlíček, Jan ; Bogdanić, Grozdana ; Wichterle, Ivan
In this work, new equipment designed for total pressure determination in mixtures where one of component is not volatile, such as polymer + solvent systems, is presented. It enables measurement of pressure above solutions in a wider concentration range. The equipment has been tested and calibrated using vapour pressure of pure water. It consist of thermostat with temperature measurement (AΣΛ, model F250), 100 ml vessel for solution with magnetic stirrer with a very strong driver, and of heated manifold for charging, degassing and for pressure measurement. Pressure is measured with use of absolute heated capacitance unit MKS Baratron (pressure range 1000 Torr = 133 kPa). Mixtures were prepared by weighing to obtain volume of 50 ml, approx.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22016090211390 - PDF
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Detection of QRS complex in experimental ECG data
Bucsuházy, Kateřina ; Ronzhina, Marina (referee) ; Vítek, Martin (advisor)
This Bachelor work deals with QRS complex detection. The theoretical part of the presented work is focused on summary of selected methods of QRS complex detection. There is described in detail wavelet transform, which is used for realization of QRS complex detector in Matlab. Specifically is used redundant dyadic discrete wavelet transform and biorthogonal wavelet with odd symmetry bior1.5. The algorithm was evaluated on the standard CSE database. The detector was modified to be able to detect QRS complexes in experimental data.
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Detection of QRS complex in experimental ECG data
Brandejs, Jakub ; Harabiš, Vratislav (referee) ; Vítek, Martin (advisor)
In this paper, called Bachelor thesis, I proposed a QRS complex detector based on wavelet transformation where biorthogonal wavelet bior1.5 was applied with use of Matlab. The detector works with antisymmetry of the wavelet to detect minimum/maximum or maximum/minimum pairs and singularity between them. Results of this detector were evaluated on the CSE database. The detector was reworked to be able to detect experimental QRS complexes.
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