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Original title in Czech: Teoretická elektrotechnikaFEKTAbbreviation: PP-TEEAcad. year: 2018/2019
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
doc. Ing. Petr Drexler, Ph.D.
Issued topics of Doctoral Study Program
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 multidisciplinary dissertation thesis focuses on the use of unmanned aerial vehicles for precision agriculture. The aim of the thesis is to propose a system for increasing the economic and ecological benefits of precision farming. The thesis assumes the testing and implementation of algorithms for image processing to Unmanned aerial vehicles.
Tutor: Marcoň Petr, doc. Ing., Ph.D.
Measuring and diagnostic methods based on the interaction of radiated electromagnetic (EM) field with test objects are currently mature and widely used technology. However, the vast majority of systems based on such approach use the concept of generating and evaluating EM fields with certain defined or swept frequency. In this case, it is necessary to take into account the possibility of reactive coupling of the measured object and the measuring device in the near field, which can deteriorate the measurement. Conversely, if broadband stochastic signals (noise signals) were used for diagnostics, these problematic coupling could be suppressed. The topic of the study is focused on the research of the use of the concept of diagnostic of materials and electromagnetic structures by the noise field, especially in radiofrequency and microwave domain, its development and experimental verification.
Novel types of optical fibers allow applications of fiber-optic sensors in areas, where classical sensors are difficult to use. The example is a sensing of electric current or magnetic field, who can achieve extreme magnitudes or sensing under strong disturbing influences. It is possible to use special types of optical fiber with strong latent birefringence for the suppression of the disturbing influences. The potentially allow for design and development of robust sensor with minimized sensitivity to outer influences. The thesis will be focused on the research and development of sensing techniques utilizing highly birefringent fibers.
The dissertation thesis is focused on testing and development of algorithms to increase the degree of autonomy drones. To do this, you need to use a variety of different sensors in combination with drone control unit. The thesis is intended to focus on algorithms using deep learning methods and other sophisticated method.
This thesis is focused on the research, characterization, modeling and experimental verification of the electromagnetic properties of a graphene structures, as monoatomic layers and multilayer structures. The aim is mainly using a numerical model to describe the expected performance of a sample of graphene structures, describe and set up an experiment to verify selected properties of such structures. On tested sample perform a series of experiments that monitored parameters described and it is thus possible to compare with the theoretically obtained. The topic is part of the grant CZ
Tutor: Fiala Pavel, prof. 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.
This thesis will be focused on development of the methods for reconstruction of images obtained by electrical impedance tomography. The main emphasis will be placed on the methods of the signals of low SNR measurement as well as on the signal processing and reconstruction of the impedance inside the examined object. Considering the time-consuming calculation with respect to higher number of measuring electrodes or smoother FEM mesh, the work will follow on the current activities of DTEEE in solving the inverse problems and parallelization of computational algorithms and their distribution to the graphics card.
Tutor: Mikulka Jan, doc. Ing., Ph.D.
The Efficient energy generation and consumption is a key factor to achieve ambitious goals related to air pollution and climate change. Modern electricity networks can include different kind of sources, such as renewable energy sources. Then, hybrid systems are obtained by combining several sources and storage types in the new concept called microgrid. In order to draw the best performance from these hybrid systems, a proper design and operation is essential. This work focuses on designing algorithms and testing scenarios to increase efficiency and use of micro-grid.
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 band f = 0.1-30Hz. It is advisable to focus on methods of achieving the results of S / W <0.05 a signal reconstruction. The proposed methods are used for evaluation of small changes in magnetic fields. The second area of research continues to change human behavior and the overall response of the 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.
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.
Magnetic resonance (MR) imaging systems play an important role in current medical diagnostic technology. However, in the widespread use of MR systems, there may be confrontation with other diagnostic and therapeutic devices such as endoscopes, ultrasound probes, implanted or extracorporeal neurostimulation devices, and others. If a device with conductive parts is implanted in the tissue, interaction with the EM field may adversely affect surrounding tissues. Safe employment of implantable devices requires research to test their coexistence with MR systems. The aim of the work will be research and development of methods and technical resources for testing and evaluating the influence of radio frequency fields on implantable devices.
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 powerful tool for the analysis and characterization of both periodic and nonperiodic 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 CZ
The thesis is focused on testing and development of detection algorithms of moving objects. These algorithms should be able to detect and classify the types of objects that might arise in areas with higher levels of security, such as airports, nuclear power plants and ammunition depots. On the basis of the detected undesirable type of flying object will suggest possible disposal of a flying object.
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
The aim of the thesis is to find and construct a model suitable for description, modeling and analysis of electromagnetic fields of microstructures of mass, focusing mainly on description and characterization of the water molecule, subsequent analysis of EMG field interaction with external EMG field with specific shape and time-space properties. Student will be acquainted with methods of numerical modeling and application of mathematical apparatus for nanomaterial engineering. For numerical modeling, it is recommended to use FEM, BEM or FVM methods supported, for example, by COMSOL, HFSS ANSYS, ANSYS Classic. The model and analyzes are specifically designed for use in, for example, plasma generators.
The aim of the thesis is to determine the parameters of specific non-standard EMG fields for finding the behavior of field interaction with water molecules. The thesis is focused on the research, description, design and modeling of specific magnetic fields for characterization of water molecule behavior in these fields using known methods FEM, BEM, FVM and their analysis. Students will be acquainted with methods of numerical modeling and application of mathematical apparatus for nanomaterial engineering. The output of the research will be a description of EMG field characteristics and water molecule interaction, focus on physical properties of fluid samples and structure description, characterization and display of 3D magnetic induction distribution, 3D structure of magnetic field gradients. Numerical modeling and analysis can be performed, for example, in COMSOL systems, in the ANSYS programming system using software tools as custom code supported by the environment used.
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 articulate approaches to the solution of large systems with periodic rate of violations periodicities, 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 goal of the doctoral study will be a research into methods of quantitative evaluation of the functional state of brain tissue via PET / MR techniques. The work will be focused on research and development of existing methods for processing and quantitative analysis of images showing the accumulation of FDG radiopharmaceuticals. Considering the occurrence of image artifacts due to susceptible and other changes, the research will be aimed to design a multiparametric analysis methodology of image data involving PET, morphological images, perfusion images using ASL (arterial spin labeling), and others. The research subject will be further related to registration, segmentation and further processing techniques of the multimodal data. Dissertation will be done in cooperation with the University Hospital in Brno Bohunice.
Spinal deformity in children (scoliosis) is a condition whose progression cannot be predicted. The results obtained via conservative therapy are problematic, and a certain degree of curvature requires surgical treatment, including the risk of repeated surgeries and complications. The presently used system of growing rods affects, on the average, 9 spinal segments; these become immobile and influence the excessive stress upon the free segments under fusion, resulting in earlier degenerative changes, back pain at a mature age, restrained bodily activity, and damage to the locomotor system. The project is conceived to propose a novel methodology for minimizing the spurious impacts of the surgical treatment of progressive spinal deformity upon child patients, with 3D modeling to define the mechanical stress distribution within the simulation of the planned intervention. The set of patients to be recruited includes individuals with idiopathic, symptomatologic, and congenital scoliosis progressing despite conservative therapy; all these subjects would otherwise undergo spinal surgery. The project aims to design a surgical solution to correct idiopathic, symptomatologic, and congenital spinal deformities by the osteotomy of 1 vertebra. It will exploit 3D modeling to define the stress on the spine, estimation of the spine development and intervertebral discs regeneration by MRI. The project will be carried out in collaboration with University Hospital in Brno Bohunice.
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.
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 is focused on the research, description, modeling and experimental verification of plasma nanotechnology allowing to modify the functional properties of the surface of an electrode system materials of an lithium-ion accumulators, including 3D micro and nanoporous structures thanks to the excellent conformation of processes. Found technology will also be applicable for material structuring design and pore and nanotubes at the material boundaries. This research will focus among other things on the possibilities of the design and creating multilayered systems. The aim of this work is to propose nanostructure of new material types for lithium-ion accumulator electrodes by means of evaluation of numerical analyzes and experimental realization / verification of the proposed structures using a combination of steps utilizing the potential of modern nanotechnologies, including plasma processes. The work is a part of the grant project with the planned financial support of the doctoral student.
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.
The aim of this work is the research on possible physical approaches to the creation of reliable OTP (one time programming) memories, usable in the construction of integrated circuits. The goal is to achieve an appropriate technology that will be suitable for implementation in the framework of existing IO manufacturing processes and will be of sufficient quality in terms of reliability of write process and long-term stability of recorded information. The basic direction will be the research of memory cells based on salicidated polymorphic silicon and the design of a suitable physico-electrical method of writing and reading process. The expected work outline will be: • Current state of the art for OTP memory technologies, categorization by attributes, performance and cost, • Creating a physical model of a memory cell from a polycrystalline silicon, a numerical model of the structure basic element, • Methods of writing and reading process and their optimization in terms of reliability of writing and stability of recorded information, • Design of the OTP structure, based on previous modeling, experimental verification of the proposed structure properties.