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Original title in Czech: Teoretická elektrotechnikaFEKTAbbreviation: PP-TEEAcad. year: 2016/2017
Programme: Electrical Engineering and Communication
Length of Study: 4 years
Accredited from: 25.7.2007Accredited until: 31.12.2020
Profile
The doctor study programme is devoted to the preparation of the high quality scientific and research specialists in various branches of electrical engineering, namely in theory of electromagnetism, electrical circuits, general methods of signal processing and electrical measurements. The aim is to provide the doctor education in all these particular branches to students educated in university magister study, make deeper their theoretical knowledge, to give them also some practical knowledge for their individual scientific work.
Key learning outcomes
The doctors are able to solve scientific and complex engineering tasks from the area of electrical engineering and electromagnetism. Wide fundamentals and deep theoretical basis of the study program bring high adaptability and high qualification of doctors for the most of requirements of their future creative practice in all areas of electrical engineering. The doctors are competent to work as scientists and researchers in many areas of basic research or research and development, as high-specialists in the development, design, construction, and application areas in many institutions, companies, and organisations of the electrical and electronic research, development, and industry as in the areas of electrical services and systems, inclusively in the special institutions of the state administration. In all of these branches they are able to work also as the leading scientific-, research-, development- or technical-managers.
Occupational profiles of graduates with examples
Students who finish this study area are able to deal with scientific and complex engineering tasks from the sphere of general electrical engineering and electromagnetism. The PhD graduates are, owing to the developed high-quality theoretical education and specialization in the chosen field of study, sought as specialists in the area of general electrical engineering. In the sphere of general electrical engineering and electromagnetism, the PhD graduates will be competent to work as scientific and research workers in basic and applied research, as specialized development, construction and operation experts in various research and development institutions, electrotechnical and electronic production companies and corporations and with producers and users of electrical systems and devices, where they will be able to make use of modern computer and measurement techniques in a creative way.
Guarantor
prof. Ing. Jarmila Dědková, CSc.
Issued topics of Doctoral Study Program
This PhD thesis will focus on research into modern methods for the analysis of magnetic resonance images by algorithms based on partial differential equations (PDEs, eg. Level-set, Perona-Malik, etc.). Development of methods will be based on advanced methods for numerical solution of PDE. PDE solution will be based on the possibilities of hybridization of algorithms and elements of stochastic approaches. The dissertation will build on cooperation with University Hospital Brno.
Tutor: Mikulka Jan, doc. Ing., Ph.D.
The key issue of high-power power-plant transformers is the existence of partial discharge (PD) activity in their dielectric oil filling. Radiofrequency detection methods may provide new possibilities in PD activity detection, observation and localization. Their recent development is enabled by the availability of advanced instrumentation, which allows signal acquisition with GHz bandwidth. Simultaneously, the availability of high-performance computing platforms enables the processing and evaluation of the digital signals with sample rate in the GSa/s regime and the localization of the signal source in the real time. It is necessary to utilize advanced concepts of UHF signal processing for successful radiofrequency detection and localization methods application. The goal is to detect the PD signal occurrence and determine its time relations, which are essential for following space localization of the PD source. The conducted research will deepen the knowledge in the problematic of PD signal evaluation and the PD source localization, which will lead to increasing the reliability and safety of the high-power power plant transformers.
Tutor: Drexler Petr, doc. Ing., Ph.D.
This PhD thesis will focus on research and development of methods for measuring and processing of diffusion-weighted images (DWI). These images will be obtained by magnetic resonance system. Based on the review of current image processing methods of diffusion tensor will be selected and applied appropriate methods for visualizing pathological and healthy tissue in real images. A suitable method for segmentation of pathological areas in the DWI will be selected and will propose a method or more methods for analyzing image data obtained in collaboration with The University Hospital Brno.
Tutor: Marcoň Petr, doc. Ing., Ph.D.
The aim of the doctoral thesis is to perform theoretical and experimental research of subwave, artificially created metal-dielectric elements and their systems composed of planar resonance structures facilitating data storage via response in the frequency region. To examine parameters of the systems, numerical modelling will be applied in conjunction with experimental measurement. From their resonance frequencies, quality factors and effective reflecting surface, the storable information density limits will be derived. The acquired knowledge will find application in future wireless security and sensor systems operating between radio frequencies and the infrared area.
Tutor: Nešpor Dušan, Ing., Ph.D.
The aim of this work is the research of methods for improving the properties of the experimental NQR spectroscope for range of 0.5 to 10 MHz. Suitable measurement methods for elimination of false signals and increase the sensitivity of the spectrometer and repeatability of measurements will be found. The result should be the design and implementation of spectrometer circuitry modifications to verify the effectiveness of the proposed methods.
Tutor: Steinbauer Miloslav, doc. Ing., Ph.D.
The application of fiber-optic sensors for the detection and identification of biological structures (DNA, proteins and cells) is a highly actual and emerging research field. They can utilize the advantage of evanescent fiber-guided light interaction with the surrounding environment, allowing convenient construction of sensors with easy applicability. It is also used spectroscopic techniques to identify biological structures. Very interesting is also the possibility of using CRDS technique (Cavity-Enhanced Ring Down Spectroscopy), which allows to achieve high sensitivity in the analysis of biological samples. The aim of the work is to research the methods of connection of the above mentioned approaches, which will open new possibilities for the realization of sensors with new and unique features.
The aim of the doctoral thesis is to perform theoretical and experimental research of high-frequency resonators in combination with phantoms that be applied in the modelling of objects measured via MRI. One of the central research areas will consist in exploring various methods of how to provide the maximum energy to the phantom while maintaining satisfactory homogeneity of the magnetic component of the electromagnetic field. In order to investigate the parameters of systems of resonators and phantoms, we will employ numerical modelling in combination with experimental measurement in the reactive area of the systems; moreover, experimental measurement in an NMR system will be performed to complete the previous sequence of steps. The monitored resonator parameters will include, above all, the resonance frequency, quality factor, homogeneity of the magnetic component of the electromagnetic field, and absorbed energy in the phantom. The acquired knowledge will be applied in MRI to improve image parameters.
Theme explores two key areas . The first is focused on continuing research into a comprehensive system of measurement methods and metrology for measuring low-level magnetic respectfully strongly disturbed environment in a narrow frequency pásmu- 0-30Hz . It is advisable to focus on methods of achieving the results of S / W < 0.05 a signal reconstruction . The proposed methods are conducted evaluation of small changes in magnetic fields . The second area continues to výzkumbiologických changes in human behavior and overall human body , its properties , and reactions to changes in the magnetic field . As a tool , the procedure is both deterministic and stochastic , with the latest mathematical tools and non-destructive measurement methods .
Tutor: Fiala Pavel, prof. Ing., Ph.D.
Electrical properties of materials we can obtain using different variants of impedance tomography algorithms. The input data are the measure data U-I (voltage-current) or B-I (magnetic field - current). The work is oriented to determine the sensitivity of reconstruction algorithms to input data obtained using different measurement ways. The aim of the research work is to find and experimentally verify the stable and not time-consuming algorithms with respect to required accuracy.
Tutor: Dědková Jarmila, prof. Ing., CSc.
One of the key problems of high-power high-voltage transformers is the existence of partial discharges PD in their dielectric oil filling. Radiofrequency methods may provide an efficient tool for observing the PD activity. The possibility of PD-radiated UHF electromagnetic (EM) signal detection is crucial for successful methods application. This signal has a relatively low magnitude and its occurrence is accompanied by a strong impulse-like interference from other discharge processes. On the other side, the PD signal dispose with specific time and frequency properties, which can be utilized for its reliable detection and evaluation. The theme of the Ph.D. study is focused on the research of new approach to PD-radiated EM signals detection utilizing signal’s specific time and frequency properties. The goal is to deepen the knowledge in the problematic of reliable detection and identification of PD activity and increasing the reliability of the high-power high-voltage transformers.
One of the current areas of research are working on sophisticated nano-structures. The work is focused in the design, modeling and experimentation with tuned nanostructures in 10-500THz. There are three goals. The first one is the field of numerical modeling of structures. Based on the real properties of nanomaterials to create a numerical model and analyze the structure. The second area focuses on the design methods and methodologies of verification of the results by experiments, measurement and verification of assumptions expected from theoretical model. Modeling using finite element method, finite volume (such as ANSYS, ANSOFT, MAXWELL etc.) to propose a model of behavior dynamics of matter. The third area of research is focused in the field of technology. This is expected to focus research on technology for implementation of the proposed structures and their feasibility in the experimental part of the topic. Results will be used for research of special tuned periodic structures. Topics can be solved in isolation, is not a precondition for any one candidate. The topic is part of the grant announced by CZ.
Thesis work deals with the material detection and classification based on principle of nuclear quadrupole resonance. This method seems to be very perspective for explosives, medicaments and drugs detection. There are many technical problems with nucleus excitation and small signal handing at receiver point. The problematic is inter-branch.
This PhD thesis will focus on numerical modeling and analysis of magnetic field deformation which is caused by the magnetic susceptibility of various materials. The starting point of solution will be review of current methods for measuring the magnetic susceptibility and the new part will focus on numerical modeling and measurement of magnetic susceptibility of MR tomograph. The aim of the Phd thesis will be expanding the current methods for measurement of magnetic susceptibility of non-ferromagnetic material. Such an enhanced method will be validated numerical model and real measurement and processing of samples macroscopically non-ferromagnetic materials in the MR tomograph.
In the process of modeling there are unsolved problems in many large parametric task with an explicit description of the minimum parameters. In numerical modeling approaches , there are solutions to such models. With suitable formulation and preparation methods are becoming powerful tools in the scientific approach to solving both basic and applied research. The aim of doctoral study is to describe and formulate approaches to solving large-scale periodic system with a small degree of violation of the periodicity on experiments to verify the nature of the models . Purposefully perform testing models nanomateriálových models , such as graphene structures , surface atomic layers with plasma applications . The topic is part granztu announced by CZ .
The work is focused on theoretical derivation of numerical models based on quantum mechanical models of materials and in combination with the stochastic, both deterministic and non-deterministic approach to formulate the determination of uncertainty for ordinary differential equations nanoelementární simple numerical model of the system, periodic system. Research continues on modifications so vytovřeného model based on numerical finite element, finite volume, boundary element method for static and dynamic models formulated using partial differential equations. The aim is to propose a numerical model as a very powerful tool for the analysis and characterization of both periodic and aperiodic structure and its geometry on the atomic and subatomic level verification on a single verifiable example, to examine the characteristics of the resulting numerical model and compared with the requirements for models for electrical discharge dynamics and evaluate the specified parameters. The topic is part of the grant announced by CZ.
The doctoral thesis will discuss the optimization of systems and control units that ensure aircraft cabin pressurization. Based on real requirements of the aircraft industry, the author intends to emphasize several major aspects related to the research and development within the given field. These aspects are as follows: a) verification of the design quality via hardware tests (PBA, the actual unit, and tests to determine the influence of the surrounding environment); b) safety of the design (FTA, namely, an analysis and solution of hazardous conditions). The tasks within this thesis are to be resolved in close cooperation with Honeywell International, Ltd.
The aim of the thesis will be the research into the current state of solving methods of invers problem of electrical impedance tomography, algorithms using regularization techniques (Tichonov regularization, method of total variation). Emphasis will be placed on the paralellization of computational algorithms and their distribution to the graphics card. The implemented algorithms will be verified on experimentally obtained data of the real samples.
Nonlinear acoustics is a comparatively modern research discipline, whose primary focus lies within the propagation of acoustic waves in a nonlinear environment, modelling of the parametric acoustic field, and applications stemming from these areas. In this branch of science, major problems currently awaiting effective solution include, above all, the analytical description and numerical modelling of a non-linear environment. These two subdomains are complemented with another task element, namely the design of inhomogeneous, locally periodic structures, which enable us to target acoustic waves into a beam and to create nonlinear components, such as acoustic diodes. Further, the discussed research discipline may comprise a number of potential application subregions, for example, contactless material testing. Within the doctoral thesis, the student will characterize and analyze amplitude modulated acoustic waves of final amplitudes, and they will also provide an analysis of parametrically excited acoustic fields. In the wider context, one of the central aims of the thesis is to employ inhomogeneous periodic structures, methods for input signal processing, and carrier wave modulation to deepen the present knowledge of nonlinear acoustic interactions in liquids.