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Okružje za razvoj telekomunikacijske podrške zasnovano na jeziku XML
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Marko Topolnik Okosnica svakog okružja za razvoj programske podrške je tekstualni izvorni kod koji predstavlja ključnu kariku u sučelju između čovjeka i računala. On je strukturiran prema pravilima apstrahiranim iz prirodnih jezika, što mu daje čitljivost i lakoću formuliranja. Povećanjem kompleksnosti softverskih projekata pojavili su se novi zahtjevi na izvorni kod: postalo je važno da on bude pogodan za automatsku obradu, točnije da čovjeku bude omogućena njena laka formalizacija....
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Online Charging for Services in Communication Network Based on User-related Context
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Tomislav Grgić The state-of-the-art charging systems utilize only a limited subset of the overall user information available in a mobile network. This thesis aims to fill this gap by addressing the problem of how to include a broader contextual information regarding users in the process of online charging. The goal of the research is to utilize the notion of recognizing certain charging events (e.g., credit depletion during an upcoming time interval) for the purpose of making timely service adaptation...
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Open-set segmentation of images by means of negative examples
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Petra Bevandić Open-set recognition simulates real-world settings by introducing outlier samples into model evaluation. This problem is more complex in the dense prediction setting because input can contain a mix of in-distribution and out-of-distribution segments. Open-set recognition tasks can be approached through simultaneous classification and anomaly detection. This work investigates methods for open-set prediction which are trained by means of negative examples. We assume that we train...
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Opportunistic authentication methods in new generation networks
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Ana Kukec The thesis addresses shortages of the IPv6 security shield, provides comprehensive analyzes of IPv6 protocols, particularly mobility and security protocols, and identifies pitfalls of known IPv6 authentication means. Afterwards, it conducts a comparative study of existing authentication mechanisms and defines a list of requirements as a postulate for the proposal of new authentication mechanisms and methods. In order to propose the solutions which solve the identified shortages following the...
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Optical communication based on wavelength reuse and modulation averaging
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Marko Šprem Optical communication systems with wavelength reuse are systems in which a single wavelength is used for transmitting and receiving information over a single optical fiber. In such systems, the information encoded in the amplitude of an optical signal arriving at a terminal has to be erased before the signal is amplified and remodulated with new information. The doubling of bandwidth efficiency offered by wavelength reuse architectures is of special interest in wavelength division multiplex...
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Optimal Control of a DC Microgrid with Renewable Energy Sources
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Marko Gulin A microgrid is a cluster of distributed generation sources, storage devices and loads that operate together. Ideally, they improve reliability and quality of the power supply and the power system. Microgrids are expected to significantly reduce power transmission losses and enable integration of a large share of renewable energy sources. This doctoral dissertation primarily develops control algorithms for residential grid-connected DC microgrids with renewable energy sources to improve...
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Optimal control of a mobile manipulator for spraying and suckering tasks in viticulture
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Ivo Vatavuk This thesis deals with the application of optimization and optimal control for the execution of viticulture related tasks with a mobile manipulator. The focus is on viticultural procedures that require manipulation for their successful execution, namely viticultural spraying and suckering. The central challenge tackled in this thesis is the application of prioritized optimization and optimal control to resolve different kinds of redundancies that arise in the execution of mentioned tasks....
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Optimal control of a tower crane based on the polytopic linear parameter varying model
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Šandor Ileš The crane is modeled as three dynamically coupled subsystems, where the coupling among them is treated as a variation in the system’s parameters. The first part of the thesis proposes a control scheme that consists of a feedback controller with an additional neural network-based friction compensator. Neural network parameter adaptation law is derived using the Lyapunov stability analysis. The second part of the thesis concentrates on a distributed non-linear model predictive control that...
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Optimal coordinated and robust control of electrical power distribution system
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Branimir Novoselnik Reliable and efficient functioning of a modern electrical power distribution system, which comprises numerous interacting subsystems (components of distribution system itself, distributed energy sources, storage units and consumers), is becoming increasingly important due to the growing penetration of distributed intermittent energy sources in power distribution systems. The dynamic interaction of locally managed subsystems gives rise to complex dynamic behaviour of the overall system and...
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Optimal energy and reserves scheduling through controllable charging and discharging a fleet of electric vehicles
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Ivan Pavić The increasing share of electric vehicles creates new challenges for both the power and the transport systems. The power system is affected at multiple levels, from distribution and transmission grid operation, through new balancing efforts, up to the long-term power system adequacy issues. To decrease the negative effect of electric vehicles on power system, uncontrollable charging can be replaced with smart charging concept (unidirectional or bidirectional controllable). Smart charging...
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