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Original title in Czech: Teoretická elektrotechnikaFEKTAbbreviation: PK-TEEAcad. year: 2015/2016
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.
Content of this work is an experimental and theoretical research of mechanism of the air ion generation, with objective in an optimization of spectral composition of ion fields in living areas. The model of ion generation will be developed, with defined temperature, ion concentration, and humidity, as well as with electric and magnetic field. Part of this work will be an optimization of method for ion concentration and spectrum measurement and design of appropriate sensors.
Tutor: Steinbauer Miloslav, 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 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.
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.
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 state of the art in technology of optical fiber manufacturing and advances in crucial fiber parameters allow to engage fiber in sensing applications, where classical transducers are hardly to apply. One of the important areas is sensing of electromagnetic transients with relatively high magnitudes. The thesis will be focused on the research and development of optical fiber sensors for identification and measurement of quantities of pulsed magnetic fields and electric currents. A special attention will be paid to methods of birefringence effects suppression together with preservation of dynamic parameters of the sensors. The utilization of novel optical fibers with low inherent birefringence will be examined also.
The theme addresses two key areas . The first focuses on the design concept of an integrated system of measurement methods and metrology for low-level magnetic measurements with respect strongly interfered environment over a wide frequency band . It is appropriate to focus on methods of achieving the results of S/N < 0.05 and signal reconstruction . The proposed method is suitable to describe the methodology of verification accuracy and repeatability of the results evaluated . The second area is focused towards human biology and description of the human body , its properties and response to magnetic field changes. As the tool is useful practices both deterministic and stochastic , with the latest mathematical apparatus
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.
This PhD thesis will be focused on research in the field of sensors of very weak magnetic fields, methods of sensing and processing the resulting signal in time and frequency domain. Further work will be involved with reconstruction methods including real signal including suppression artifacts that manifest during sensing the magnetic binary record. Dissertation will be linked to cooperation with the Textile Testing Institute, s.p.
One of the actual areas of research are working on sophisticated nano-structures. The work is focused on the design, modeling and experiments with tuned nanostructures in 10-500THz. There are three support areas. The first is the field of numerical modeling of structures based on the real properties of nanomaterials. The second area focuses on the design methods and methodologies of verification experiments, measuring and verifying assumptions expected from theoretical model. Finite element modeling, finite volume (eg ANSYS, ANSOFT, MAXWELL etc.) to propose a model of behavior dynamics of matter. The third area is focused in the field of technology. This is expected to focus research on technologies for the implementation of the proposed structures and their feasibility in the experimental part of the topic. The results will be used for research of special tuned periodic structures. Topics can be addressed separately, is not a prerequisite for any one candidate.
This work will be focused on research in experimental methods of obtaing spectra of gas atoms. It is assumed review of current methods of spectroscopy and available databases of spectra for different gases, theoretical description of the proposed methods with their experimental verification for the selected problem. This dissertation will be focus on design of a modified spectroscopic methods suitable for analysing gases (eg. Nuclear quadrupole resonance, infrared spectroscopy, Raman spectroscopy, and others).
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 of large-scale problems the multiparametric tasks occure with an explicit description of the minimum parameters. In numerical modeling some approaches exist for such models. Basic two can be characterized as deterministic and nondeterministic process. Both approaches can be used in numerical modeling of large-scale problems associated with electrical engineering, electronic and electromagnetic fields. When suitable formulated, they become powerful tools in the scientific approach to solving of basic and applied research. The aim of doctoral study is to describe and define the two approaches and then experimentally verify the properties of models, explicitly on nanomaterial models for example on a graphene structures.
The research work is focused on theoretical derivation of numerical models based on quantum mechanical models in combination with stochastic, deterministic and non-deterministic as access determining uncertainty formulated for ordinary differential equations nanoelementární simple numerical model of the system. Research continues to modify the model so verified numerical finite element method, 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 structures and the geometry of the atomic and subatomic level, a simple verification verifiable example, examine the parameters thus established numerical model and compare with the requirements for models for electrical discharge dynamics and evaluate the given parameters.
This PhD thesis will focus on the properties of resonant structures for the optical region of the electromagnetic spectrum. The presented research will concentrate mainly on analyzing the distribution of the electromagnetic field in the area of resonant structures, optimizing the geometric parameters, and designing resonators for the infrared band. The investigation of the related characteristics (parameters) will be performed via analytical and numerical modelling. Within the outlined process, the author will design appropriate measurement methods for experimental evaluation of the resonant structures and resonators. Generally, studies and proposals of the design, analysis and materialization of resonance structures for wavelengths within the infrared region offer new perspectives for creating unique identification structures. The acquired knowledge will influence future wireless security and sensor systems.
Tutor: Kadlec Radim, Ing., Ph.D.