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Témata prací

Na obsahu této stránky pracujeme.

Nalezeno 8 záznamů.
  • Instrumentation for advanced measurement and control in smart grid systems and industrial automation
    • Abstrakt: Main assignment will be to develop and test hardware and firmware for embedded measurement or control system either in power quality monitoring (high sampling rates) or power factor correction and active filtering (high order of reliability required). Good prior knowledge in hardware design and/or C/C++ software development for embedded systems required. Experience with real time software development an advantage.
    • Typ: Internship
    • Trvání: 12 měsíců
    • Specializace: FM - Technical Cybernetics
    • Vedoucí: jan.kraus@tul.cz
    • Další informace: Scholarship is available,May take place during summer holidays,Suitable for students of PhD programme,Suitable for students of Master programme
  • Pushing Fundamental Limitations of Frequency-Domain Blind Source Separation
    • Abstrakt: The goal of Blind Audio Source Separation (BASS) is to separate signals that are observed by an array of microphones as mixtures of signals originating from individual sources (e.g. speakers). BASS is typically performed in the frequency-domain: The observed signals are divided into frames and each frame is transformed by Discrete Fourier Transform (DFT). This causes some fundamental limitations for the separation accuracy. The signals in the time-domain obey the convolutive mixing, which is, in the frequency domain, approximated as pure multiplication (instantaneous mixing). Circular-convolution effects, framing, the finite length of DFT and so forth impose approximation errors. The goal of this thesis is to develop approaches for minimizing the adverse effects on the accuracy of BASS. Methods of multirate digital signal processing, new models for BSS and/or special sensors can be used to this end.
    • Typ: Thesis
    • Trvání: 36 měsíců
    • Specializace: FM - Technical Cybernetics
    • Vedoucí: zbynek.koldovsky@tul.cz
    • Další informace: Scholarship is available,Suitable for students of Bachelor programme
  • Blind Source Separation Through Joint Independent Subspace Extraction
    • Abstrakt: The goal of Blind Source Separation (BSS) is to separate mixtures of signals (sources) that are observed by several sensors. BSS methods based on the assumption that the sources to-be separated are independent have been very popular due to their wide applicability. Blind Source Extraction is a sub-problem of BSS where only one source should be separated from the other background signals. Our group has been developing methods for this problem called Independent Component/Vector Extraction (ICE/IVE). The goal of this thesis is to modify existing ICE/IVE approaches for extracting subspaces of signals (the existing methods extract only one-dimensional signals). The development of novel methods and the computation of Cramer-Rao bound for the problem could be also the goal.
    • Typ: Thesis
    • Trvání: 36 měsíců
    • Specializace: FM - Technical Cybernetics
    • Vedoucí: zbynek.koldovsky@tul.cz
    • Další informace: Scholarship is available,Suitable for students of PhD programme
  • Data mining and performance presentation in large scale energy management systems
    • Abstrakt: To study, design and implement methods for large scale data analysis within the domain of general purpose energy management applications. Main assignment is to invent methods for anomalies detection in the given data series of measurements from multiple sites across the monitored systems with or without previous knowledge about the analysed issues. Higher level of statistics (time series) and computer science/software engineering skills expected.
    • Typ: Thesis
    • Trvání: 36 měsíců
    • Specializace: FM - Technical Cybernetics
    • Vedoucí: jan.kraus@tul.cz
    • Další informace: Scholarship is available,May take place during summer holidays,Suitable for students of PhD programme,Suitable for students of Master programme
  • Desky plošných spojů - návrh, analýzy, pokročilé technologie
    • Abstrakt: Téma doktorského studia je zaměřeno na aktuální problematiku vlastností desek plošných spojů (DPS) zejména v souvislosti s novými možnostmi jejich výroby a zvyšováním požadavků uživatelů. Studium by mělo být zaměřeno na vlastnosti DPS s ohledem na řízenou impedanci a na její řízení při použití technologií 3D tisku (jak na vnějších vrstvách, tak plnoobjemový tisk).
    • Typ: Thesis
    • Trvání: 36 měsíců
    • Specializace: FM - Technical Cybernetics
    • Vedoucí: zdenek.pliva@tul.cz
    • Další informace: Suitable for students of PhD programme
  • Partially Supervised Blind Source Separation
    • Abstrakt: The goal of Blind Source Separation (BSS) is to separate mixtures of signals (sources) that are observed by several sensors. The term "blind" means that minimum information should be used, and the separation should be based only on general mathematical principles. Independent Component Analysis is a BSS method based on the assumption that the originals signals are statistically independent. BSS methods are widely used as the conditions for being applicable are very general, however, their performance is limited due to lack of information. They also suffer from indeterminacies (e.g. the original order of signals cannot be determined without additive knowledge). BSS methods can be modified in various ways so that some knowledge is used for improving the separation. These methods are often referred to as semi-blind. The goal of this thesis is to develop new semi-blind approaches, especially, for audio source separation, such that are robust to inaccurate information. Also, new methods for side information acquisition (such as through training a deep neural network) can be developed.
    • Typ: Thesis
    • Trvání: 36 měsíců
    • Specializace: FM - Technical Cybernetics
    • Vedoucí: zbynek.koldovsky@tul.cz
    • Další informace: Scholarship is available,Suitable for students of PhD programme
  • Inverse numerical model for groundwater temperature tracing
    • Abstrakt: As the observation data for groundwater transport inside the rock are limited (mostly to indirect methods, point or integral data), it is convenient but also challenging to include more physical processes to constrain the hypotheses on spatial flow distribution on various scales, including fracture network in hard rock. The contribution of groundwater flow to heat transport is well known and the temperature monitoring is used as an indicator of water flow directions and magnitude in standard configuration or conditions. The aim of the suggested thesis is to demonstrate an evaluation with more complex conditions - on a case study of a tunnel with water pipeline in granite massif: a combination of natural water/heat transport and antropogenic quasi-periodic influence, as well as a combination of more temporal/spatial scales, tenths to hundreds of meters, annual periods vs. construction lifetime. From ten years monitoring data of flow rates and water and rock temperatures, it is intended to estimate a configuration and physical parameters of permeable zones both near the tunnel and in the whole rock block crossed by the tunnel. Inverse solvers and multiscale model approaches will be applied, for coupled process of groundwate flow, solute transport and heat transport.
    • Typ: Thesis
    • Trvání: 36 měsíců
    • Specializace: FM - Applied Sciences in Engineering
    • Vedoucí: milan.hokr@tul.cz
    • Další informace: Scholarship is available,May take place during summer holidays,Suitable for students of PhD programme
  • New Models for Independent Component/Vector Extraction
    • Abstrakt: The goal of Blind Source Separation (BSS) is to separate mixtures of signals (sources) that are observed by several sensors. Blind Source Extraction (BSE) aims at extracting only one particular signal. We have been developing methods for Independent Component/Vector Extraction (ICE/IVE) that extract the desired signal blindly based on the assumption that it is statistically independent of the other (background) signals. The ideas of ICE/IVE can be also applied to modify advanced BSS method for BSE. For example, the recently proposed Independent Low-Rank Matrix Analysis (ILRMA) can be modified this way. The goal of this thesis is to develop such modifications and, also, new models such as block-wise determined models or other models considering joint parameters.
    • Typ: Thesis
    • Trvání: 36 měsíců
    • Specializace: FM - Technical Cybernetics
    • Vedoucí: zbynek.koldovsky@tul.cz
    • Další informace: Scholarship is available,Suitable for students of PhD programme
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