Profile of the branch:|
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.
Issued topics of Doctoral Study Program:|
- Advanced methods of signal analysis for localization of partial discharges
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.
- Computational aspects of the theory of uncertainties
Theory of uncertainties allows us to specify a tolerance range of direct and indirect measurements. It is an internationally recognized technique based on statistical analysis of uncertainty sources behavior, which may be for instance the measuring instruments, operation, etc. The uncertainty is determined by the uncertainty propagation law. When a complex measurement process is to determine the resulting uncertainty calculation is more complicated and time/computationally intensive. Monte Carlo method is commonly used for complex measurement system evaluation. Dissertation will focus on the general theory of uncertainty, a survey of existing techniques for determining the overall uncertainty and a major part of the work will be focused on the use of the theory of uncertainties in digital measurements using methods of computer vision.
- Electromagnetic properties of graphene
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
- Experimental research of measuring methods for NQR spectroscopy
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.
- Fast reconstruction of electrical impedance tomography images
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.
- Fiber-optic sensors for biological structures analysis
The application of fiber-optic sensors of physical quantities is a highly actual and emerging research field. In connection with rapid progress in research areas like microbiology and molecular biology, the fiber-optic sensors become very interesting from the view of detection and identification of biological structures (DNA, proteins and cells). They can utilize the advantage of evanescent fiber-guided light interaction with the surrounding environment, allowing convenient construction of sensors with easy applicability. 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.
- Low level magnetic measurements
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.
- Mapping of an electrical conductivity based on impedance tomography
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.
- Methods for partial discharge UHF signal detection and identification
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.
- Models of the structure of matter
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
- Moving object detection
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.
- Nuclear quadrupole resonance techniques for material detection
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
- Numerical models of stochastic problems
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.
- Quantitative evaluation of the functional state of brain tissue via PET/MR
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.
- Spatial Analysis of the Force Load on a Deformed Developing Spine, and Corrective Force Modelling Applied to Minimize the Scope of a Scoliosis Surgery
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.
- The Theory of Nonlinear Acoustics in Relation to Inhomogeneous Locally Periodic Structures
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.
- Tuned nanostructure
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.