|
|
Utilization of deep learning for channel estimation in OFDM systems
Hubík, Daniel ; Staněk, Miroslav (referee) ; Miloš, Jiří (advisor)
This paper describes a wireless communication model based on IEEE 802.11n. Typical methods for channel equalisation and estimation are described, such as the least squares method and the minimum mean square error method. Equalization based on deep learning was used as well. Coded and uncoded bit error rate was used as a performance identifier. Experiments with topology of the neural network has been performed. Programming languages such as MATLAB and Python were used in this work.
|
|
|
Establishing speaker's age and sex
Rendek, Tomáš ; Pfeifer, Václav (referee) ; Atassi, Hicham (advisor)
This work deals with speaker´s age and gender recognition. At the beginning it introduces the practical usage of this application and discusses the solutions available. The theoretical part of the thesis specifies the feature extraction and reduction methods and speech databases used in the experiments. The practical part describes the recognizer implemented in the Emotional tool and in two chapters describes the individual experiments. Regarding speaker´s gender estimation; we focused on the impact of the emotional state and speaker's age on the classification process. The two remain experiments were dedicated for general gender estimation performed by using two different classifiers – GMM and k-NN. These two classifiers were used in age estimation as well. In this case, four Group of age was formed and two different feature sets namely: segmental and suprasegmental were exploited four groups
|
|
|
Web Application for Making Predictions of a Call Centre
Mička, David ; Hynek, Jiří (referee) ; Bartík, Vladimír (advisor)
The goal of this thesis is to create a web application for creation of call centre predictions. The app should be able to replace current solutions that are in use in the daily operation of Kiwi.com s.r.o. The app should be more intuitive and easier to use and maintain than Verint or the spreadsheet solution of doing predictions. It should also have enough options for creation of tactical forecasts that allow the company to react on upcoming situations and should help set realistic expectations for the management of our customer centre.
|
|
|
Measurement of ECG signal for TWA analysis
Řezáč, Petr ; Vítek, Martin (referee) ; Kozumplík, Jiří (advisor)
The thesis deals with possibilities of using wavelet transform in the field of surface electrocardiogram (ECG) signals denoising and ECG signals measuring. Several algorithms have been used to detect and estimate T-wave alternans (TWA), such as spectral method (SM), Poincaré Mapping (PM) or correlation method (CM). T-wave alternans, also called repolarization alternans, is a phenomenon appearing in the electrocardiogram as a consistent fluctuation in the repolarization morphology on every-other-beat basis. Electrical TWA has been recognized as a marker of electrical instability, and has been shown to be related with patients at increased risk for ventricular arrhytmias. Presence of TWA has been reported in a wide range of clinical and experimental situations including long QT syndrome, myocardial infarction, angina pectoris, acute ischemia, etc. Projected methods of detection TWA are realized in Matlab software, and they are experimentally verified on real ECG signals from the European ST-T Database.
|
|
| |
|
|
Valuation methodology used for the purpose of UniCredit Bank and ČSOB
Mareš, Miroslav ; Kavka, Milan (referee) ; Šmahel, Milan (advisor)
Diploma thesis deals with the procedures for valuation of property according to the methodologies used by banks UniCredit Bank and ČSOB. This diploma thesis describes the principles of valuation of assets. In this thesis there are mentioned basic concepts of banking. It carries out a detailed analysis, description and comparison of selected valuation methodologies used by banks and methodologies used in appraiser´s work, who prepares evaluations for banking institutions. Based on the findings an analysis of the different methodologies is made.
|
|
|
Estimation of Respiration Activity from ECG Using Mechine Learning
Ondrejková, Eliška ; Vítek, Martin (referee) ; Plešinger, Filip (advisor)
This Bachelor thesis deals with methods to estimate respiration activity from ECG. For a better understanding of a subject, the anatomy and physiology of the respiratory and cardiovascular systems are described. Furthermore, several estimation methods are explained as well. A public dataset of ECG signals read from polysomnography was used in the practical part. An algorithm for estimation was implemented in the programming language Python using the PyTorch library. Finally, results are discussed and compared to other methods.
|
|
|
Risk Management inside Construction Company
Resl, Jan ; Chval, Petr (referee) ; Nováková, Jana (advisor)
The aim of the thesis is to analyse issues of risk management in a construction company, especially in the context of construction contracts implementation. The first part is devoted to applied terminology and interpretation of relevant terms, followed by a classification of risks from different perspectives, including the risks’ possible further sub classification. Furthermore, significant risk resources and construction participants who might be affected by the risks are presented. The third chapter deals with risk management; individual phases of this complex process are described herein, including their correct sequences, as well as a selection of methods and techniques that are standardly used in risk management. The last, fourth chapter summarises the problems of risk management on a practical example, where a construction company implements a construction contract by applying selected risk management methodologies.
|
|
|
Extraction of information from web pages
Caha, Tomáš ; Burget, Radim (referee) ; Komosný, Dan (advisor)
This thesis deals with the separation of information from websites of selected geolocation services. Methods of geographical location of network devices and amount of available data provided by chosen freely accessible geolocation databases. The data are summarized with focus on methods of obtaining information about IP addresses from APIs of particular databases. In the paper there are also presented ways used to develop the system for automatic estimation of geographic location of IP addresses specified in source file and process of comparing retrieved data with reference data. The system is created in Python and provides a simple way for verifying information about given IP addresses in five freely accessible databases. Furthermore, accuracy of the retrieved data is evaluated and five geolocation databases is compared.
|
|
|
Property valuation for mortgage loans in the Czech Republic
Kovářová, Petra ; Bejšovec, Jaroslav (referee) ; Staněk, Roman (advisor)
The subject of this bachelor's thesis focuses on an assets valuation, especially on residential real estate for banking purposes. The thesis is devided into two parts. The first part explains the theoretical concepts which are closely linked to an asset's evaluation, while the second part focuses on the practical areas which presents an expert opinion based on comparative methods when the price of a specific property is determined.
|
guest ::
