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  • Books  (125)
  • thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering  (86)
  • thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists  (36)
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  • KIT Scientific Publishing  (125)
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  • Books  (125)
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  • 1
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: The increasing use of automated laser welding processes causes high demands on process monitoring. This work demonstrates methods that use a camera mounted on the focussing optics to perform pre-, in-, and post-process monitoring of welding processes. The implementation uses machine learning methods. All algorithms consider the integration into industrial processes. These challenges include a small database, limited industrial manufacturing inference hardware, and user acceptance.
    Keywords: CNN; stacked dilated U-Net; semantic segmentation; hairpin technology; laser welding; quality assurance; machine learning; Qualitätssicherung; semantische Segmentierung; Hairpin Technologie; Laserschweißen; Maschinelles Lernen; Künstliche Intelligenz ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 2
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    KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: The performance and flexibility of robot technologies make it possible to bring robots to everyday life. This creates many challenges: safety, legal regulations, reliability, reusability, and business models must be considered under special conditions. The acceptance and interaction of humans and robots are of central importance for the success of the applications. This collection summarises 15 studies from the BMBF-funded program "Robots for Assistance: Interaction in the Field.
    Keywords: human-robot-interaction (HRI); assistance robots; service robots; Mensch-Roboter-Interaktion (MRI); Assistenzroboter; Serviceroboter; Roboter im Alltag ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 3
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: This work presents methods for using the ceramic glow plug as a sensor element. This means that the ceramic glow plug will not only perform its conventional task as a heating element but will also provide information, such as motor speed, from the combustion chamber as a sensor. The main focus will be on the change in resistance, particularly under the influence of a temperature change, in the immediate vicinity of the ceramic glow plug.
    Keywords: glow plug; Ceramic glow plug; Sensor; Drehzahlbestimmung; Glühkerze; Keramikglühkerze ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 4
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: This report presents an update of the experimental achievements published in the review “State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared, Millimeter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) and in the KIT Scientific Report 7761 (2021), related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.
    Keywords: Dielectric Vacuum Windows; Gyro-Amplifier; Gyro-BWO; Gyrotron-Oscillator; Dielektrische Vakuumfenster; CARM; Gyro-Verstärker; Gyro-RWO; Gyrotron-Oszillator ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 5
    Publication Date: 2024-04-11
    Description: The quasi-n-level operation of the flying capacitor converter (FCCs) is an optimized operation mode of a multilevel converter. The quasi-n-level operation of a multilevel converter was presented with an analysis of its advantages and disadvantages. For the Q2LB of the FCC, the theory as well as the control, modulation and balancing algorithms are presented. A medium voltage prototype was built to validate the theory.
    Keywords: medium voltage; flying capacitor converter; multilevel converter; Mittelspannungsanwendungen; Flying Capacitor Umrichter; Multilevel Umrichter; Quasi-n-Level Betrieb ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 6
    Publication Date: 2024-04-14
    Description: Interaction with dynamic image content is challenging for user perception, cognition and motor action. This dissertation identifies appropriate gaze-based interaction techniques for moving object selection in image sequences using multiple cross-sectional and one longitudinal user study. Further investigations evaluate how gaze-based interaction and automated image exploitation algorithms support human video exploitation as well as whether gaze-based user task classification is feasible.
    Keywords: gaze-based task classification; automated image exploitation algorithms; moving object selection; eye gaze interaction; human-computer interaction; blickbasierte Aufgabenklassifikation; automatische Bildauswerteverfahren; Selektion bewegter Objekte; Blickinteraktion; Mensch-Computer-Interaktion ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 7
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Accompanied with the development of the wireless communication technologies, the high data traffic is more necessary for civil and industrial applications than ever The concept of an intelligent reflective surface (IRS) has attracted considerable attention recently as a low-cost solution. As the main contribution, the dissertation creates new state-of-the-art and formulates a solid milestone for the IRS research field.
    Keywords: Signal Processing; Communication Systems; Wireless Communication; Intelligent Reflecting Surface; Signalverarbeitung; Kommunikationssysteme; drahtlose Kommunikation; Intelligente reflektierende Oberfläche ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 8
    Publication Date: 2024-04-11
    Description: In this work, the first simulation model of oxygen depolarized cathodes (ODC), which are silver catalyst-based gas diffusion electrodes, is presented that considers the phase equilibrium of the gas-liquid interface and structure-related inhomogeneities in electrolyte distribution. By means of the model it has been identified that mass transport of water and ions in the liquid phase is a crucial factor for electrode performance and how it is influenced by the electrode structure.
    Keywords: Chlor-alkali electrolysis; Three-phase model; Electrochemical Mass Spectroscopy; Inhomogeneous electrode structure; Chloralkali-Elektrolyse; Dreiphasen Modellierung; Elektrochemische Massenspektroskopie; Maxwell-Stefan Diffusion; Inhomogene Elektrodenstruktur ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 9
    Publication Date: 2024-04-11
    Description: A fundamental requirement for future automated vehicles is that curbs and other bumps in the road can be driven over safely, reliably and accurately. This work presents a concept for a model-based, predictive longitudinal vehicle dynamics control. It demonstrates in practice how the knowledge of the road profile ahead can be used to both increase the control performance and improve the driving comfort.
    Keywords: Preview; Longitudinal Motion Control; Road Profile Disturbances; Vehicle Dynamics; Vorausschau; Längsregelung; Störungen durch Fahrbahnprofil; Two Point Tire Model; Fahrzeugdynamik ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 10
    Publication Date: 2024-04-11
    Description: This work presents a physically motivated model for predicting the current/voltage behavior of PEM fuel cells. Extensive impedance measurements and DRT analyses were used to identify and quantify all loss processes. The developed model was successfully validated and provides insights into the internal processes of the fuel cell. It enables targeted optimization and shows great potential for increasing the performance of PEM fuel cells.
    Keywords: Ersatzschaltbild; Modellierung; Verteilungsfunktion; Impedanzspektroskopie; PEM-Brennstoffzelle ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 11
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    KIT Scientific Publishing
    Publication Date: 2024-05-09
    Description: In this work, the authors analysed the co-dependency between models and analyses, particularly the structure and interdependence of artefacts and the feature-based decomposition and composition of model-based analyses. Their goal is to improve the maintainability of model-based analyses. They have investigated the co-dependency of Domain-specific Modelling Languages (DSMLs) and model-based analyses regarding evolvability, understandability, and reusability.
    Keywords: Domain-specific modeling languages; Software Architecture; Internal software quality; Domänenspezifische Modellierungssprachen; Software Architektur; Interne Software Qualität ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 12
    Publication Date: 2024-04-11
    Description: This work focuses on the Limited Information Shared Control and its controller design using potential games. Through the developed systematic controller design, the experiments demonstrate the effectiveness and superiority of this concept compared to traditional manual and non-cooperative control approaches in the application of large vehicle manipulators.
    Keywords: Experimental Validation; Vehicle Manipulator; Cooperative Shared Control; Potential Games; Differential Games; Experimentelle Validierung; Mobile Arbeitsmaschinen; Kooperative Regelung; Potenzialspiele; Differenzialspiele ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 13
    Publication Date: 2024-04-11
    Description: The design of approaches for future market-based energy network operation faces the technical challenge of needing to coordinate a vast number of network participants spatially and temporally, in order to balance energy supply and demand, while achieving secure network operation. To meet this challenge, the research field of transactive control emerged. Within this work a new transactive control approach for coupled electric power and district heating networks is presented.
    Keywords: Transactive Control; Wärmenetze; Stromnetze; Sektorenkopplung; Energiemärkte; District Heating Networks; Electric Power Networks; Energy Markets ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 14
    Publication Date: 2024-04-11
    Description: Ultrasound Tomography is an emerging technology for medical imaging that is quickly approaching its clinical utility. Research groups around the globe are engaged in research spanning from theory to practical applications. The International Workshop on Medical Ultrasound Tomography 2019 brought together scientists to exchange their knowledge and discuss new ideas and results in order to boost the research in Ultrasound Tomography.
    Keywords: Ultraschall Tomographie ; Medizinische Bildgebung ; Ultrasound Tomography ; Medical Imaging ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 15
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    KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: This cumulative habilitation thesis, proposes concepts for (i) modelling and analysing dependability based on architectural models of software-intensive systems early in development, (ii) decomposition and composition of modelling languages and analysis techniques to enable more flexibility in evolution, and (iii) bridging the divergent levels of abstraction between data of the operation phase, architectural models and source code of the development phase.
    Keywords: Software and Systems Engineering; Software-intensive Systeme; Evolution; Verlässlichkeit; Systemarchitektur; Software-intensive Systems; Dependability; System Architecture ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 16
    Publication Date: 2024-04-11
    Description: A gyrotron is used in magnetically confined plasma experiments for heating, current drive, plasma stabilization and plasma diagnostics. This work presents the first design and construction of a multi-frequency / multi-purpose coaxial-cavity pre-prototype gyrotron operating at (136)/170/204 GHz with an output power of 2 MW. It is the first step towards operating frequencies up to 240 GHz using the coaxial-cavity gyrotron technology.
    Keywords: mode generator; multi-frequency operation; electron vacuum tube; gyrotron; nuclear fusion; Modenerzeuger; Mehrfrequenzbetrieb; Vakuumröhre; Gyrotron; Kernfusion ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 17
    Publication Date: 2024-04-11
    Description: A Flywheel Energy Storage System (FESS) can rapidly inject or absorb high amounts of active power in order to support the grid, following abrupt changes in the generation or in the demand, with no concern over its lifetime. The work presented in this book studies the grid integration of a high-speed FESS in low voltage distribution grids from several perspectives, including optimal allocation, sizing, modeling, real-time simulation, and Power Hardware-in-the-Loop testing.
    Keywords: Schwungräder; Energiespeicher; Echtzeitsimulation; Power Hardware-in-the-Loop-Tests; Flywheels; Energy Storage; Real-time Simulation; Power Hardware-in-the-Loop Testing ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 18
    Publication Date: 2024-04-11
    Description: Microwave-assisted alkaline hydrolysis of PET can be 20 times faster and at lower temperatures. This work presents a novel industrial microwave applicator at 2.45 GHz with homogeneous distribution to support this reaction, which allows an efficient and continuous operation. In addition, an innovative dielectric and calorimetric measurements setup is presented. Furthermore, the modelling of the reaction kinetics based on the measured dielectric parameters is presented.
    Keywords: Mikrowellen; dielektrische Messungen; industrieller Maßstab; alkalische Hydrolyse von PET; microwaves; dielectric measurements; industrial scale; alkaline hydrolysis of PET ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 19
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Robust navigation as well as mapping of the environment are critical for autonomous aerial vehicles. This is especially challenging in poor visual conditions or degraded GNSS. Therefore, this thesis proposes multi-sensor fusion approaches based on FMCW radar, cameras and inertial sensors. These approaches can cope with such challenging conditions as demonstrated in different scenarios.
    Keywords: Sensorfusion; Navigation; Kartierung; FMCW-Radar; Thermalkamera; sensorfusion; navigation; mapping; FMCW radar; thermal camera ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 20
    Publication Date: 2024-04-11
    Description: The approach of a laser scanning headlamp for adaptive light functions includes six laser sources which are deviated on a micro mirror. The oscillation of that mirror generates an extended light distribution on a white light converter which is then projected on the road. This work describes that approach and presents methods to evaluate the homogeneity of headlamp light distributions.
    Keywords: automotive light functions; homogeneity; laser scanning; Headlamp; Fahrzeug-Lichtfunktionen; Homogenität; Laser-Scanner; Scheinwerfer ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 21
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Reinforcement Learning is a promising tool to automate controller tuning. However, significant extensions are required for real-world applications to enable fast and robust learning. This work proposes several additions to the state of the art and proves their capability in a series of real world experiments.
    Keywords: Regelungstechnik; Künstliche Intelligenz; Fahrzeugregelung; Längsdynamik; Bestärkendes Lernen; Control Theory; Artificial Intelligence; Vehicle Control; Longitudinal Dynamics; Reinforcement Learning ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 22
    Publication Date: 2024-04-14
    Description: Ellipsometry is a measuring method for surface characterization and thin-film measurement of flat surfaces using polarized light. However, a new measuring principle based on return-path ellipsometry and retroreflection enables the detection of free-form surfaces. This new measurement principle and related questions regarding the measurement function, evaluation algorithms and ambiguities as well as degrees of freedom of the solution set are examined in this work.
    Keywords: imaging; retroreflection; curved surface; ellipsometry; bildgebend; Retroreflexion; gekrümmte Oberfläche; Ellipsometrie; metrology; Messtechnik ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 23
    Publication Date: 2024-04-11
    Description: During the evolvement of autonomous driving technology, obtaining reliable 3-D environmental information is an indispensable task in approaching safe driving. The operational behavior of automotive radars can be precisely evaluated in a virtual test environment by modeling its surrounding, specifically vulnerable road users (VRUs). Such a realistic model can be generated based on the radar cross section (RCS) and Doppler signatures of a VRU. Therefore, this work proposes a high-resolution RCS measurement technique to determine the relevant scattering points of different VRUs.
    Keywords: RCSmodeling of extended targets; range-Doppler; radar high-resolution measurement; Human body radar cross section (RCS) measurement; RCS-Modellierung von ausgedehnten Ziel; Entfernungs-Doppler; hochauflösende Radarmessung; Messung des Radarquerschnitts (RCS) des menschlichen Körpers ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 24
    Publication Date: 2024-04-11
    Description: A waveguide-based sensor chip is demonstrated that is suitable for point-of-care applications. The biosensor is designed using a mathematical model to investigate the sensitivity of the waveguides. A new class of integrated laser sources for visible wavelengths is being investigated for the first time for light coupling into the waveguides. The functionality of the waveguide-based biosensor chip is successfully demonstrated by detection experiments.
    Keywords: Sensorik; integrierte Laser; organische Laser; photonische Wellenleiter; patientennahe Labordiagnostik; Sensors; integrated lasers; organnic lasers; photonic waveguides; point-of-care diagnostics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 25
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    KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: The understanding and interpretation of complex 3D environments is a key challenge of autonomous driving. Lidar sensors and their recorded point clouds are particularly interesting for this challenge since they provide accurate 3D information about the environment. This work presents a multimodal approach based on deep learning for panoptic segmentation of 3D point clouds. It builds upon and combines the three key aspects multi view architecture, temporal feature fusion, and deep sensor fusion.
    Keywords: Temporal Fusion; Sensor Fusion; Semantic Segmentation; Panoptic Segmentation; Zeitliche Fusion; Semantische Segmentierung; Panoptische Segmentierung; Sensorfusion; Deep Learning ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 26
    Publication Date: 2024-04-11
    Description: Hybrid perovskite photovoltaics could play a vital role in future’s renewable energy production. However, there are still severe challenges when scaling the technology. In this work, perovskite solution films drying in laminar and slot-jet air flows are investigated extensively by optical in situ characterization. The main results are a quantitative model of perovskite drying dynamics and a novel in situ imaging technique – yielding valuable predictions for large-scale perovskite fabrication.
    Keywords: Hybrid perovskite ; in situ characterization ; drying dynamics ; photoluminescence imaging ; up-scaling ; Hybride Perowskite ; In-Situ Charakterisierung ; Trocknungsdynamik ; Photolumineszenz-Bildgebung ; Hochskalierung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 27
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    KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: Human support in surveillance tasks is crucial due to the overwhelming amount of sensor data. This work focuses on the development of data fusion methods using the maritime domain as an example. Various anomalies are investigated, evaluated using real vessel traffic data and tested with experts. For this purpose, situations of interest and anomalies are modelled and evaluated based on different machine learning methods.
    Keywords: spatio-temporal data; situation analysis; anomaly detection; räumlich-zeitliche Daten; Maritime Überwachung; Anomaliedetektion; maritime surveillance; Situationsanalyse; machine learning; Maschinelles Lernen ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 28
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Photonic integrated circuits (PIC) become increasingly important for numerous applications. Mass production of PIC has become widely available, but large-volume low-cost photonic packaging still represents a challenge. Additive micro-fabrication of free-form optical coupling structures is discussed as a concept to overcome this technology gap. Multi-photon 3D-lithography is used to fabricate dielectric waveguides ("photonic wire bonds", PWB) as well as facet-attached microlenses (FaML).
    Keywords: Photonische Aufbau- und Verbindungstechnik; integrierte photonische Schaltkreise; Multiphotonenlithographie; additive 3D Mikrofabrikation; Mikrooptik; photonic packaging; photonic integrated circuits (PIC); multi-photon lithographie; additive 3D micro-fabrication; micro-optics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 29
    Publication Date: 2024-04-11
    Description: In this study the technical and economic feasibility of a 380 kV, 5 kA resistive type superconducting fault current limiter was investigated. Conceptual designs were developed with superconducting tapes cooled by liquid nitrogen and arranged in bifilar coils. A cryostat was designed using FEM simulations taking into account the non-linear voltage distribution. For the complete system including current limiting reactors and cooling system, the investment and operation costs were calculated.
    Keywords: economic feasibility; bifilar coil; high voltage; superconducting fault current limiter; superconductor; wirtschaftliche Machbarkeit; bifilare Spule; Hochspannung; supraleitender Strombegrenzer; Supraleiter ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 30
    Publication Date: 2024-04-11
    Description: In this work, artificial neural networks trained in a supervised manner for spectral unmixing are investigated. For this purpose, a suitable network architecture is determined first. After that, the focus lies on the generation of suitable training data. Model-based methods that generate training data from real pure spectra and data-based methods that augment existing training data are presented and evaluated.
    Keywords: data generation; data augmentation; supervised training; artificial neural network; hyperspectral image; Datenerzeugung; Datenaugmentierung; überwachtes Training; Hyperspektralbild; künstliche neuronale Netze ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 31
    Publication Date: 2024-04-14
    Description: I report on applications of slicing and program dependence graphs (PDGs) to software security. Moreover, I propose a framework that generalizes both data-flow analysis on control-flow graphs and slicing on PDGs. This framework can be used to systematically derive data-flow-like analyses on PDGs that go beyond slicing. I demonstrate that data-flow analysis can be systematically applied to PDGs and show the practicability of my approach.
    Keywords: Programmabhängigkeitsgraphen; Slicing; Informationsflusskontrolle; Datenflussanalyse; Kontrollflussgraphen; program dependence graphs; slicing; information flow control data-flow analysis; control-flow graphs ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 32
    Publication Date: 2024-04-11
    Description: This work presents the development of a new sub-THz source for the generation of trains of coherent high-power ultra-short pulses at 263 GHz via passive mode-locking of two coupled helical gyro-TWTs. For the first time, it is shown that the operation of such passive mode-locked helical gyro-TWTs in the hard excitation regime is of particular importance to reach the optimal coherency of the generated pulses. This could be of particular interest for some new time-domain DNP-NMR methods.
    Keywords: passive Modenkopplung; Sub-THz; Gyro-TWT; Ultrakurze Pulse; passive mode-locking; sub-THz; gyro-TWT; ultra-short pulses ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 33
    Publication Date: 2024-04-14
    Description: Business processes and information systems evolve constantly and affect each other in non-trivial ways. Aligning security requirements between both is a challenging task. This work presents an automated approach to extract access control requirements from business processes with the purpose of transforming them into a) access permissions for role-based access control and b) architectural data flow constraints to identify violations of access control in enterprise application architectures.
    Keywords: Software Engineering; Enterprise Architecture; Zugriffskontrolle; Geschäftsprozesse; Access Control; Business Processes ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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  • 34
    Publication Date: 2024-04-11
    Description: This work presents three advances to scale SNSPDs from few-pixel devices to large detector arrays: atomic layer deposition for the fabrication of uniform superconducting niobium nitride films of few-nanometer thickness, a frequency-multiplexing scheme to operate multiple detectors with a reduced number of lines, and the integration of SNSPDs with free-form polymer structures to achieve efficient optical coupling onto the active area of the detectors.
    Keywords: SNSPD; Einzelphotonendetektor; Supraleitung; Atomlagenabscheidung; single-photon detector; superconductivity; thin-film technology; frequency-division multiplexing; optical integration ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 35
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-16
    Description: The simulation of ceramic phosphors by means of the diffusion approximation of the radiation transport equation is extended from rotationally symmetrical cases to general, three-dimensional problems. The phosphor is simulated with the diffusion approximation for a temporal and spacial variable laser light source for the first time. Therefore, different laser light sources are being compared to evaluate, which one of the alternatives is best suited for the intended use in an automotive head lamp.
    Keywords: Laser ; Scheinwerfer ; Adaptiv ; Dynamisch ; Diffusionsnäherung ; head light ; adaptive ; dynamic ; diffusion approximation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 36
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: The state of the art in the optical characterization of materials is advancing rapidly. New insights have been gained into the theoretical foundations of this research and exciting developments have been made in practice, driven by new applications and innovative sensor technologies that are constantly evolving.The great success of past conferences proves the necessity of a platform for presentation, discussion and evaluation of the latest research results in this interdisciplinary field.
    Keywords: Charakterisierung von Materialien; Hyperspektral; multispektrale Bildanalyse; Röntgenmethoden; Recycling; characterisation of materials; hyperspectral; multispectral image analysis; X-ray methods; recycling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 37
    Publication Date: 2024-04-11
    Description: In this thesis, the use of voltage-source active filters for harmonic mitigation of grid-connected power converters is proposed. Based on a modeling of this novel converter configuration, an operating strategy is derived to accomplish this task with low control bandwith, low passive filtering effort, and high efficiency with only a small increase in installed semiconductor power.
    Keywords: Aktive Filter; Stromrichter; Harmonische Oberschwingungen; Kompensation von stromrichterbedingten Oberschwingungen; Filter für Netzstromrichter; Active Filters; Power Converters; Harmonics; Mitigation of Converter-Induced Harmonics; Filters for Grid-Connected Power Converters ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 38
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    KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: Configuring an anomaly-based Network Intrusion Detection System for cybersecurity of an industrial system in the absence of information on networking infrastructure and programmed deterministic industrial process is challenging. Within the research work, different self-learning frameworks to analyze passively captured network traces from PROFINET-based industrial system for protocol-based and process behavior-based anomaly detection are developed, and evaluated on a real-world industrial system.
    Keywords: Industrielles Steuerungssystem; Netzwerksicherheit; Netzwerk-Intrusion-Detection-System; Anomalieerkennung; selbstlernend; Industrial Control System; Network Security; Network Intrusion Detection System; Anomaly Detection; self-learning ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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  • 39
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: An early detection and diagnosis of atrial fibrillation sets the course for timely intervention to prevent potentially occurring comorbidities. Electrocardiogram data resulting from electrophysiological cohort modeling and simulation can be a valuable data resource for improving automated atrial fibrillation risk stratification with machine learning techniques and thus, reduces the risk of stroke in affected patients.
    Keywords: Electrophysiologische Modellierung und Simulation; Elektrokardiogramm; Maschinelles Lernen; Vorhofflimmern; Statistisches Shape Modell; electrophysiological modeling and simulation; electrocardiogram; machine learning; atrial fibrillation; statistical shape model ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 40
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Optical measurement methods are becoming increasingly important for high-precision production of components and quality assurance. The increasing demand can be met by modern imaging systems with advanced optics, such as light field cameras. This work explores their use in the deflectometric measurement of specular surfaces. It presents improvements in phase unwrapping and calibration techniques, enabling high surface reconstruction accuracies using only a single monocular light field camera.
    Keywords: phase unwrapping; camera calibration; light field cameral Phasenentfaltung; Kamerakalibrierung; Lichtfeldkamera; surface reconstruction; deflectometry; Oberflächenrekonstruktion; Deflektometrie ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 41
    Publication Date: 2024-05-13
    Description: Digitalization has already transformed many areas of the economy and social life. Aspects of healthcare and clinical practice are also undergoing digital transformation. In light of these developments, this dissertation sheds light on the acquisition, representation, and use of process knowledge in the context of hybrid AI methods. The central contribution is the structure-preserving back-and-forth transformation of process trees to process plans.
    Keywords: KI ; Expertenwissen ; Formalisierung ; Prozess ; Transformation ; AI ; Expert knowledge ; formalization ; process ; transformation ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 42
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Radar target simulators (RTSs) deceive a radar under test (RuT) by creating an artificial environment consisting of virtual radar targets. In this work, new techniques are presented that overcome the rasterization deficiency of current RTS systems and enable the generation of virtual targets at arbitrary high-precision positions. This allows for continuous movement of the targets and thus a more credible simulation environment.
    Keywords: automotive radar; Radar target simulation; Automobilradar; Radarzielsimulation; autonomous driving; validation; Validierung; Autonomes Fahren ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 43
    Publication Date: 2024-04-14
    Description: In August 2022, Fraunhofer IOSB and IES of KIT held a joint workshop in a Schwarzwaldhaus near Triberg. Doctoral students presented research reports and discussed various topics like computer vision, optical metrology, network security, usage control, and machine learning. This book compiles the workshop's results and ideas, offering a comprehensive overview of the research program of IES and Fraunhofer IOSB.
    Keywords: optical metrology; computer vision; Optische Messtechnik; Bildverarbeitung; usage control; network security; machine learning; Usage Control; Netzwerksicherheit; Maschinelles Lernen ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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  • 44
    Publication Date: 2024-04-11
    Description: This work presents model-based algorithmic approaches for interference-invariant time delay estimation, which are specifically suited for the estimation of small time delay differences with a necessary resolution well below the sampling time. Therefore, the methods can be applied particularly well for transit-time ultrasonic flow measurements, since the problem of interfering signals is especially prominent in this application.
    Keywords: Laufzeitschätzung; Analytische Wavelet-Pakete; Ultraschalldurchflussmessung; Time Delay Estimation; Analytic Wavelet Packets; Ultrasonic Flow Measurement ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 45
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: This book proposes a novel deep learning based detection method, focusing on vehicle detection in aerial imagery recorded in top view. The base detection framework is extended by two novel components to improve the detection accuracy by enhancing the contextual and semantical content of the employed feature representation. To reduce the inference time, a lightweight CNN architecture is proposed as base architecture and a novel module that restricts the search area is introduced.
    Keywords: Objektdetektion ; Neuronale Netze ; Luftbilddaten ; Object Detection ; Deep Learning ; Aerial Imagery ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 46
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Although laser cutting of metals is a well-established process, there is considerable potential for improvement with regard to various requirements for the manufacturing industry. First, this potential is identified and then it is shown how improvements could be made using machine learning. For this purpose, a database was generated. It contains the process parameters, RGB images, 3D point clouds and various quality features of almost 4000 cut edges.
    Keywords: cut quality ; convolutional neural network ; machine learning ; stainless steel ; Laser cutting ; Schnittqualität ; Maschinelles Lernen ; Edelstahl ; Laserschneiden ; Faltendes neuronales Netz ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 47
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: The aim of this work is the development of a Radar system for consumer applications. It is capable of tracking multiple people in a room and offers a touchless human-machine interface for purposes that range from entertainment to hygiene.
    Keywords: Radar; FMCW; Gestenerkennung; Tracking; gesture recognition; tracking ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 48
    Publication Date: 2024-04-14
    Description: 2021, the annual joint workshop of the Fraunhofer IOSB and KIT IES was hosted at the IOSB in Karlsruhe. For a week from the 2nd to the 6th July the doctoral students extensive reports on the status of their research. The results and ideas presented at the workshop are collected in this book in the form of detailed technical reports.
    Keywords: computer vision; optische Messtechnik; network security; usage control und machine learning; optical metrology; usage control and machine learning ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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  • 49
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: This work presents a real-time dynamic pricing framework for future electricity markets. Deduced by first-principles analysis of physical, economic, and communication constraints within the power system, the proposed feedback control mechanism ensures both closed-loop system stability and economic efficiency at any given time. The resulting price signals are able to incentivize competitive market participants to eliminate spatio-temporal shortages in power supply quickly and purposively.
    Keywords: Strommarkt; Dynamische Optimierung; Spieltheorie; Nichtlinearer Reglerentwurf; Mathematische Modellbildung; Electricity Market; Dynamic Optimization; Game Theory; Nonlinear Control; Mathematical Modeling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 50
    Publication Date: 2024-04-14
    Description: IoT applications perceive and interact with the environment via smart devices and cloud services. When operating such applications one is faced with the challenge of configuring the smart devices and the cloud services in a manner, which achieves a high data quality at low operational costs. This work supports IoT operators with IoT collection strategies and cost optimization functions for data qualities, which are influenced by the interplay of smart device and cloud service configurations.
    Keywords: Internet-of-Things (IoT); Cloud Computing; Lastkontrolle; Flow Control ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 51
    Publication Date: 2024-04-11
    Description: Especially pedestrians rely on the interaction with other road users. The introduction of automated driving systems withdraws this communication from drivers and thus, vehicles need to interact with pedestrians. Therefore, multiple vehicle-pedestrian-communication concepts are evaluated. A driver intention prediction allows pedestrians to learn these newly introduced signals, while driver and vehicle communicate simultaneously.
    Keywords: Fahrzeug-Fußgänger-Kommunikation; Symbole; Farben; Neuronale Netze; Automatisiertes Fahren; Vehicle-Pedestrian-Communication; Symbols; Colors; Neural Networks; Automated Driving ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 52
    Publication Date: 2024-04-14
    Description: Model-based performance prediction is a well-known concept to ensure the quality of software.Current approaches are based on a single-metric model, which leads to inaccurate predictions for modern architectures. This thesis presents a multi-strategies approach to extend performance prediction models to support multicore architectures.We implemented the strategies into Palladio and significantly increased the performance prediction power.
    Keywords: Modellbasierte Performancevorhersage; Software Engineering; Multicore-Architekturen; parallele Entwurfsmuster; Model-based Performance Prediction; Multicore architectures; Parallel Design Patterns ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 53
    Publication Date: 2024-04-11
    Description: The proposed method for the configuration of renewably powered energy supply systems as isolated grids backed by energy storage technology and based on statistical models shows the economic viability of such a system. The energy supply system was configured by implementing cost models using an optimization software. Validation was achieved through comparison with measurements taken from two different existing energy supply areas.
    Keywords: Windenergie; Solarenergie; Energiespeicher; energieautark; Wasserstoff; energy; renewable; wind; solar; hydrogen ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 54
    Publication Date: 2024-04-11
    Description: To keep up with the ever-increasing data transmission speed needs, data center interconnects are scaling up to provide multi-Tbit/s connectivity. These links require a high number of WDM channels, while the associated transceivers should be compact and energy efficient. Scaling the number of channels, however, is still limited by the lack of adequate optical sources. In this book, we investigate novel chip-scale frequency comb generators as multi-wavelength light sources for Tbit/s WDM links.
    Keywords: Frequenzkämme; Modengekoppelte Laserdioden; Mikroresonator Solitonen; kohärente Terabit-Kommunikation; integrierte Photonik; frequency combs; Mode-locked laser diodes; microresonator solitons; coherent terabit communications; integrated photonics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 55
    Publication Date: 2024-04-11
    Description: High-temperature superconductors have distinct advantages compared to conventional conductors. Below their critical temperature, superconductors have immeasurably low ohmic losses. To maintain the superconducting state, superconductors require constant cooling. This study aims at identifying the environmental impacts of the application of superconductors in future grid technologies such as superconducting power cables.
    Keywords: Hochtemperatursupraleiter; Supraleitende Kabel; Ökobilanz; Energieverteilung; High-temperature superconductor; Superconducting cable; Life cycle assessment; Energy transmission ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 56
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Powerline communications utilize the existing energy distribution network for information transmission. In this work, the low voltage grid is investigated as a transmission channel for frequencies up to 500 kHz. Based on characterizing the channel with regard to its cyclostationary properties, novel adaptive transmission methods are developed. The presented methods are evaluated under realistic channel conditions.
    Keywords: adaptive modulation ; cyclostationary analysis ; channel measurement ; smart grid ; power line communications ; adaptive Modulation ; Kanalmessung ; Smart Grid ; Powerline-Kommunikation (PLC) ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 57
    Publication Date: 2024-04-11
    Description: This work presents the development and application of high-speed fluorescent thermal imaging for quench analysis in high-temperature superconductors (HTS). Using a fluorescent coating, with a temperature-dependent light emission, temperature changes can be calculated over 2D surfaces. The technique uncovered peculiar transient effects in novel HTS tape architectures and also helped to verify and better understand hot spot development in both insulated and non-insulated, HTS–wound pancake coils.
    Keywords: Supraleiter ; Hochtemperatursupraleiter ; Wärmeaufnahme ; Quench ; superconductivity ; high-temperature superconductors ; thermal imaging ; quench ; normal zone propagation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 58
    Publication Date: 2024-04-14
    Description: In this work, an approach for adaptive world modeling is proposed. World models for cognitive systems often employ predefined domain models, which may become insufficient when encountering unforeseen entities. The presented approach addresses an adaptive extension of such domain models, considering the relevance of proposed model adaptations. As a basis, a quantitative model evaluation is devised, rating the ability of a domain model to represent the currently observed environment state.
    Keywords: Umweltmodellierung ; quantitative Modellbewertung ; probabilistische Informationsverarbeitung ; Konzeptlernen ; kognitive Systeme ; world modeling ; quantitative model evaluation ; concept learning ; probabilistic information processing ; cognitive systems ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 59
    Publication Date: 2024-04-11
    Description: Knowledge of the cycle-frequency changes in the machine currents is of great advantage for many methods of controlling modern, highly utilized electrical machines. But how can these changes in machine currents be reliably measured during operation? Is the very short time of the individual switching states sufficient? And how can the changes in the currents be described mathematically and interpreted physically? This work provides an answer to these questions.
    Keywords: Synchronmaschine; Regelung; Least-Squares-Schätzer; Modellbildung; Parameteridentifikation; synchronous machine; control; Least-Squares-Estimator; modeling; parameter identification ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 60
    Publication Date: 2024-04-11
    Description: LiDAR (Light detection and ranging) represents one of the key technologies for autonomous driving. For this reason, this work is concerned with the question of eye safety of the laser-based technology. For this purpose, investigations on laser-tissue interactions, laser-induced damage thresholds and mechanisms by multi-pulse trains were performed as well as assessments according to the laser safety standard in Europe (DIN EN 60825) and the USA (ANSI Z.136) were applied.
    Keywords: Laser; Schädigung; Netzhaut; Schwellenwerte; Mehrfachpulse; wiederholte; Laser-Gewebe-Wechselwirkung; Augensicherheit; Lasersicherheit; Fotochemie; Damage; retina; thresholds; multiple pulses; repetitive; Laser-tissue-interaction; eye safety; laser safety; photo-chemical ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 61
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: In this work, the task of wide-area indoor people detection in a network of depth sensors is examined. In particular, we investigate how the redundant and complementary multi-view information, including the temporal context, can be jointly leveraged to improve the detection performance. We recast the problem of multi-view people detection in overlapping depth images as an inverse problem and present a generative probabilistic framework to jointly exploit the temporal multi-view image evidence.
    Keywords: probabilistische Personendetektion ; Netzwerk von 3D-Sensoren ; Tiefenbilder ; inverses Problem ; joint multi-view person detection ; depth sensor indoor surveillance ; mean-field variational inference ; vertical top-view indoor pedestrian detection ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 62
    Publication Date: 2024-04-14
    Description: Automated defense and prevention measures designed to protect industrial automation and control systems often compromise their real-time processing, resilience and redundancy. Therefore, they need to be performed as non-invasively as possible. Nevertheless, particularly minimally invasive security analysis and incident response are still poorly researched. This work presents solutions based on new semantic- and SDN-based approaches to some of the most important problems in these areas.
    Keywords: Sicherheitsanalyse; Ontologie; Software-defined Networking; Incident Response; Industrial Automation and Control Systems; security analysis; semantic web; ontology; software-defined networking; incident response; industrial automation and control systems ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 63
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Image processing combines the disciplines of cameras – image-based sensors – with the processing of the sensor data – the images. From this follows the particular attraction of this field. The conference proceedings at hand of the “Image Processing Forum”, which took place on 24.-25.11.2022 in Karlsruhe as a common event of the Karlsruhe Institute of Technology and the Fraunhofer Institute of Optronics, System Technologies and Image Exploitation, contain the articles of the contributions.
    Keywords: Bildverarbeitung ; automatische Sichtprüfung ; maschinelles Lernen ; bildgestützte Messtechnik ; image processing ; automated visual inspection ; machine learning ; image-based measurement technology ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 64
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    KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: Diffractive lens arrays are proposed in this work for application in reflected-light confocal microscopes. They have overcome the limitations between fields of view and resolution of traditional objectives. Experiments of multi-spot confocal imaging in surface metrology and fluorescence microscopy have been demonstrated based on the proposed concepts, which have shown capabilities of high-resolution measurement over a large area.
    Keywords: diffraktives optisches Element; Konfokalmikroskopie; Fluoreszenzmikroskopie; Metrologie; 3D Messtechnik; diffractive optical element; confocal microscopy; fluorescence microscopy; metrology; 3D measurement technology ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 65
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: This work is a comprehensive, formal treatment of anonymous point collection. The proposed definition does not only provide a strong notion of security and privacy, but also covers features which are important for practical use. An efficient realization is presented and proven to fulfill the proposed definition. The resulting building block is the first one that allows for anonymous two-way transactions, has semi-offline capabilities, yields constant storage size, and is provably secure.
    Keywords: Anonymität ; Loyalitätssysteme ; Reputation Systems ; Loyalty Systems ; Payment Systems ; Privacy ; Reputationssysteme ; Bezahlsysteme ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 66
    Publication Date: 2024-04-11
    Description: The atrial substrate undergoes electrical and structural remodeling during atrial fibrillation. Detailed multiscale models were used to study the effect of structural remodeling induced at the cellular and tissue levels. Simulated electrograms were used to train a machine-learning algorithm to characterize the substrate. Also, wave propagation direction was tracked from unannotated electrograms. In conclusion, in silico experiments provide insight into electrograms' information of the substrate.
    Keywords: Vorhofflimmern ; Fibrose ; maschinelles Lernen ; Bidomain ; Modellierung des Herzens ; atrial fibrillation ; fibrosis ; machine learning ; bidomain ; cardiac modeling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 67
    Publication Date: 2024-04-11
    Description: Effective heat transport systems in aerospace are based on multiphase loop heat pipes (LHPs). For a precise thermal control of the electronics, electrical heaters are additionally used to control the operating temperature of the LHP. This work focusses on the dynamical modeling and model-based control design for LHP-based heat transport systems. The results of this work can be used for the optimization of current control parameters and the efficient control design for future LHP applications.
    Keywords: Dynamische Modellierung; Wärmetransportsystem; Loop Heat Pipe; Nichtlineare Regelung; dynamical modeling; heat transport system; loop heat pipe; nonlinear control ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 68
    Publication Date: 2024-04-11
    Description: In this work, spatio-spectrally coded multispectral light fields, as taken by a light field camera with a spectrally coded microlens array, are investigated. For the reconstruction of the coded light fields, two methods, one based on the principles of compressed sensing and one deep learning approach, are developed. Using novel synthetic as well as a real-world datasets, the proposed reconstruction approaches are evaluated in detail.
    Keywords: Computer Vision; Lichtfelder; Multispektrale Bildgebung; Compressed Sensing; Deep Learning; computer vision; light fields; multispectral imaging; compressed sensing; deep learning ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 69
    Publication Date: 2024-04-14
    Description: The system described in this work, called ProNat, makes end-user programming with spoken language possible. It enables non-experts to describe programs for different target systems and to extend their functionality using everyday language. ProNat is based on PARSE, a specially designed agent-based framework architecture. In three independent studies, ProNat has proven to be principally capable of synthesizing programs from spoken utterances.
    Keywords: Computerlinguistik; Künstliche Intelligenz; Programmsynthese; Endnutzer-Programmierung; Softwaretechnik; Natural Language Processing; Artificial Intelligence; Program Synthesis; End-user Programming; Software Engineering ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 70
    Publication Date: 2024-04-11
    Description: In the first part of this dissertation, a framework for the design of a CNN for FPGAs is presented, consisting of a preprocessing algorithm, an augmentation technique, a custom quantization scheme and a pruning step of the CNN. The combination of conventional image processing with neural networks is shown in the second part by an example from robotics, where an image-based visual servoing process is successfully conducted for a gripping process of a robot.
    Keywords: künstliche neuronale Netze; Bildverarbeitung; bildbasierte Regelung; FPGA; CNN; image based visual servoing ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 71
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: The research reported in this thesis focuses on the decision making aspect of human-machine cooperation and reveals new insights from theoretical modeling to experimental evaluations: Two mathematical behavior models of two emancipated cooperation partners in a cooperative decision making process are introduced. The model-based automation designs are experimentally evaluated and thereby demonstrate their benefits compared to state-of-the-art approaches.
    Keywords: Mensch-Maschine-Interaktion; Mensch-Maschine-Kooperation; Mensch-Maschine-Systemdesign; Kooperative Entscheidungsfindung; Entscheidungsfindung; Human-Machine Interaction; Human-Machine Cooperation; Human-Machine System Design; Cooperative Decision Making; Decision Making ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 72
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: In recent years, OFDM has become more and more important for radar applications. A disadvantage, however, is the need for high sampling rates, which is exactly the starting point of the frequency comb OFDM radar scheme. With its help, the bandwidth in the radar channel can be enhanced without increasing the sampling rates at the same time. In this way, a high range resolution can be achieved without using fast converters with high sampling rates.
    Keywords: Frequenzkamm ; MIMO ; OFDM ; Radar ; Compressed Sensing ; Frequency Comb ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 73
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Image processing plays a key role for fast and contact-free data acquisition in many technical areas, e.g., in quality control or robotics. These conference proceedings of the “Forum Bildverarbeitung”, which took place on 26.-27.11.202 in Karlsruhe as a common event of the Karlsruhe Institute of Technology and the Fraunhofer Institute of Optronics, System Technologies and Image Exploitation, contain the articles of the contributions.
    Keywords: machine learning ; Bildverarbeitung ; automatische Sichtprüfung ; bildgestützte Messtechnik ; maschinelles Lernen ; Image processing ; automated visual inspection ; image based measurement technology ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 74
    Publication Date: 2024-04-11
    Description: This work addresses the automated generation of physical-based models and model-based observers. We develop port-Hamiltonian methods, which for the first time allow a complete and consistent automation of these two processes for a large class of interconnected systems.
    Keywords: Mathematische Modellbildung; Beobachterentwurf; Automatisierung; Port-Hamiltonsche Systeme; Mathematical Modeling; Observer Design; Automation; Port-Hamiltonian Systems ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 75
    Publication Date: 2024-04-11
    Description: By providing a high resolution at high distances in a broad field of view, LiDAR sensors are a key element in automated driving cars. However, in harsh environmental conditions, particles from rain or dust attach on the outer surface of the sensor and cause a degradation of the overall performance. This work introduces several methods to detect and characterize those particles, realizing the integration of an intelligent and fully automated cleaning system to restore the required performance.
    Keywords: LiDAR; autonomes Fahren; Fahrerassistenzsysteme; Regensensor; Refraktometer; automated driving; driver assistance systems; rain sensor; refractometer ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 76
    Publication Date: 2024-04-11
    Description: This work aimed at designing, studying and producing the first prototypes of KIDs tailored for fusion plasma polarimetric diagnostics. Diamond was considered for the first time as substrate material for low-temperature superconducting detectors given its unmatched optical, radiation hardness and thermal qualities, properties necessary for working environments potentially saturated with radiation. This work represents a first step toward the optimization and final application of this technology.
    Keywords: Supraleitender Detektor; Diamant; NbN; Kernfusionsplasma; Polarimetrie; Superconducting detector; Diamond; Nuclear Fusion Plasma; Polarimetry ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 77
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Radar is an important part of autonomous driving and allows an appropriate environment recognition. The contribution of this work is a new arrangement of capacitively coupled patches and a holistic view on substrates under different environmental conditions. Thus, an optimized design can meet reliability and bandwidth requirements.
    Keywords: Streifenleitungsantennen Materialeigenschaften ; Umweltbedingungen ; Patch antenna ; material properties ; environmental conditions ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 78
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: In this work describes the development of a light-based driver assistance system through projections on the road. Under realistic conditions it is shown that information can be transmitted to the driver at night by using projections in front of the vehicle: test persons drive more safely through narrow spaces and react earlier to obstacles. A prototype suitable for road use demonstrates the possibility of a near-series implementation of such a headlamp projection system.
    Keywords: Communication ; Road Safety ; New Lighting Systems ; Projection ; Driver Assistance ; Kommunkation ; Verkehrssicherheit ; neuartige Lichtsysteme ; Projektion ; Fahrerassistenz ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 79
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: In this work, two methods are developed and evaluated to integrate and test functional chains of automotive lighting functions on simulation-based test systems. The focus is initially on an approach for the efficient use of light for the display of high contrasts in virtual night driving with a real driver assistance camera. Furthermore, a test method is developed to evaluate pixel-based lighting functions on a hardware-in-the-loop test system based on metrics. In this work, two methods to stimulate and test automotive front lighting functions on simulation-based test benches are developed and evaluated. The first approach deepens the idea to reach necessary high contrasts for virtual night driving with a real driver assistance camera by an efficient use of reflecting light. Furthermore, a test method is shown to test pixel-based lighting functions based on metrics on a hardware-in-the-loop test bench.
    Keywords: Lichtfunktion ; Hardware-in-the-Loop ; Testmethoden ; front ligthing function ; hardware-in-the-loop ; test methods ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 80
    Publication Date: 2024-04-14
    Description: Intuitive interaction techniques are essential for mobile augmented reality systems. For implicit interaction, this work presents techniques for automatic eye movement analysis and visualization. In the context of explicit interaction, a fusion of optical flow, skin color segmentation, and a hand pose estimator is presented along with a tracking method for localization and pose estimation of a hand in monocular color images.
    Keywords: Mensch-Maschine-Interaktion; Blickanalyse; Hand-Tracking; Handpose; Augmented Reality; human computer interaction; gaze analysis; hand tracking; hand pose; augmented reality ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 81
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: This work proposes a probabilistic extension to Bézier curves as a basis for effectively modeling stochastic processes with a bounded index set. The proposed stochastic process model is based on Mixture Density Networks and Bézier curves with Gaussian random variables as control points. A key advantage of this model is given by the ability to generate multi-mode predictions in a single inference step, thus avoiding the need for Monte Carlo simulation.
    Keywords: Probabilistische Sequenzmodellierung ; Stochastische Prozesse ; Neuronale Netzwerke ; Parametrische Kurven ; Probabilistic Sequence Modeling ; Stochastic Processes ; Neural Networks ; Parametric Curves ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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  • 82
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: This work introduces a new specification and verification approach for dynamic systems. The introduced approach is able to provide type II error free results by definition, i.e. there are no hidden faults in the verification result. The approach is based on Kaucher interval arithmetic to enclose the measurement in a bounded error sense. The developed methods are proven mathematically to provide a reliable verification for a wide class of safety critical systems.
    Keywords: Verifikation ; Dynamische Systeme ; Intervall Arithmetik ; Diagnose ; Bounded Error ; Verification ; Dynamic Systems ; Interval Arithmetic ; Diagnosis ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 83
    Publication Date: 2024-04-11
    Description: The work deals with aspects of image and video exploitation for monitoring, surveillance and security applications in non-cooperative application situations. The term "non-cooperative" refers to scenarios in which, for example, the recording parameters (backgrounds, lighting conditions, etc.) are not or hardly known. The goal is to detect man-made modifications (artifacts) in natural environments.
    Keywords: Bildauswertung; Videoauswertung; Mustererkennung; Szeneninterpretation; Salienz; Image Exploitation; Video Exploitation; Pattern Recognition; Scene Interpretation; Saliency ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 84
    Publication Date: 2024-04-14
    Description: Sensor-based sorting enables the separation of individual particles from a material stream. In this work, a novel sorting system using an area-scan camera is investigated. The use of high-speed cameras raises exciting research questions from a computer science perspective regarding the extraction and use of more advanced features, especially motion information about the materials to be sorted.
    Keywords: Sichtprüfung; sensorgestützte Sortierung; Multiobjekt-Tracking; Klassifikation; Optical inspection; sensor-based sorting; multiobject tracking; classification ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 85
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    KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: Developing variable systems faces many challenges. Dependencies between interrelated artifacts within a product variant, such as code or diagrams, across product variants and across their revisions quickly lead to inconsistencies during evolution. This work provides a unification of common concepts and operations for variability management, identifies variability-related inconsistencies and presents an approach for view-based consistency preservation of variable systems.
    Keywords: Softwaretechnik; Modellgetriebene Entwicklung; Variabilitätsmanagement; software engineering; model-driven engineering; variability management ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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  • 86
    Publication Date: 2024-04-14
    Description: Software vendors must consider confidentiality especially while creating software architectures because decisions made here are hard to change later. Our approach represents and analyzes data flows in software architectures. Systems specify data flows and confidentiality requirements specify limitations of data flows. Software architects use detected violations of these limitations to improve the system. We demonstrate how to integrate our approach into existing development processes.
    Keywords: Vertraulichkeit; Zugriffskontrolle; Informationsflusskontrolle; Datenflüsse; Softwarearchitektur; confidentiality; access control; information flow control; data flows; software architecture ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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  • 87
    Publication Date: 2024-04-11
    Description: In classical approaches for the torque control of Permanent Magnet Synchronous Machines the torque references are converted into current references by static lookup tables which consider power losses. This procedure is dynamically suboptimal, interdependent and strongly machine-dependent. This work addresses the question: How can a Model Predictive Controller be designed to simultaneously optimize the objectives torque reference tracking and power loss minimization?
    Keywords: Modellprädiktive Regelung (MPR) ; Permanentmagneterregte Synchronmaschine (PSM) ; multikriterielle Optimierung ; lexikographische Optimierung ; Model Predictive Control (MPC) ; Permanent Magnet Synchronous Machine (PMSM) ; Multi-Objective Optimization ; Lexicographic Optimization ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 88
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: In this work, the stack operation of solid oxide cells (SOCs) is analyzed by a simulation model. For this purpose, all coupled physical and chemical sub-processes are represented within a two-dimensional geometry of a single stack level. After parameterization with experimental data and extensive validation, the model is applied to three research issues in SOC technology.
    Keywords: Brennstoffzelle ; Festoxidzelle ; Modellierung ; Simulation ; Fuel Cell ; Solid Oxide Fuel Cell ; modelling ; simulation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 89
    Publication Date: 2024-04-11
    Description: In this work, discrete-time and continuous-time methods that integrate flexible reference trajectory representations into Adaptive Dynamic Programming approaches are presented and analyzed for the first time. Moreover, theoretical conditions on the system state are derived that ensure the persistent excitation property, which is crucial for the convergence of the adaptation. Real-world applications of the presented adaptive optimal trajectory tracking control methods reveal their potential.
    Keywords: Adaptive Dynamic Programming (ADP); Reinforcement Learning (RL); Persistent Excitation (PE); adaptive Optimalregelung; lernende Regler; KI; Adaptive Optimal Control; Learning-Based Control; AI ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 90
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Currently, dynamically reconfigurable systems are not used in automotive and there is no process model for their development. The focus of this dissertation is to explore methods and approaches for the development of such systems. One major architectural driver is autonomous driving, another is functional high integration on central computing platforms. Taking these into account, dynamic reconfiguration is classified and explored.
    Keywords: fail-operational ; functional safety ; functional integration ; automotive ; E/E-architecture ; Fehlertoleranz ; Funktionale Sicherheit ; Funktionale Hochintegration ; Automotive ; E/E-Architektur ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 91
    Publication Date: 2024-04-11
    Description: Model-based methods are increasingly being used for a safe and efficient operation of battery cells. For modeling battery cells, fractional models which are characterized by non-integer derivative orders have become established due to their electrochemical interpretability. In this work, methods for parameter and derivative order identification of fractional systems are derived without restriction with respect to the excitation at the begin of identification.
    Keywords: Fraktionale Analysis; Lithium-Ionen-Batteriezelle; Parameteridentifikation; Fractional calculus; Lithium-ion battery cell; Parameter identification ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 92
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: In the THz frequency range, superconducting detectors coupled to planar antennas are well suited for the use in the field of accelerator beam diagnostics. This work studies the coupling efficiency and spectral sensitivity of different antenna designs. Based on the conclusions, two different detector systems for spectroscopic measurements are developed and verified with measurements at accelerator-based light sources.
    Keywords: Supraleitung ; THz-Detektoren ; Terahertzstrahlung ; Planarantennen ; Synchrotronstrahlung ; superconductivity ; terahertz detector ; terahertz radiation ; planar antennas ; synchrotron radiation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 93
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: Visual perception is one of the most important sources of information for both humans and robots. A particular challenge is the acquisition and interpretation of complex unstructured scenes. This work contributes to active vision for humanoid robots. A semantic model of the scene is created, which is extended by successively changing the robot's view in order to explore interaction possibilities of the scene.
    Keywords: Roboter ; Humanoide Robotik ; robots ; Robots ; humanoid robots ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 94
    Publication Date: 2024-04-11
    Description: An important method to increase the spectral efficiency of wireless radio communication networks is the use of multiple-input multiple-output communication systems operating in the centimetre and millimetre wave region. How these multiple-input multiple-output communication systems can be realised with as little hardware effort as possible using hybrid beamforming architectures is the subject of this work.
    Keywords: Mobilfunk; Mehrantennensysteme; MIMO; Hybrides Beamforming; Kanalschätzung; mobile communication; hybrid beamforming; channel estimation; channel sounding ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 95
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: The aim of this work is the design and validation of an image-based optimization of laser flatbed cutting machines to avoid tilted parts. Three different approaches for the visual detection of the slats are presented and, based on this, it is discussed to what extent a change in the nesting of the parts to be produced can be used to increase efficiency.
    Keywords: nesting ; industrial image processing ; laser cutting ; Schachtelung ; Industrielle Bildverarbeitung ; Laserschneiden ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 96
    Publication Date: 2024-04-11
    Description: The electrification and automation of passenger vehicles promote innovations of the entire vehicle architecture. If wheel-selective steered and driven vehicles are considered, challenges of urban regions can be met. In order to combine these development priorities with the alternative vehicle concept, an optimal suspension is designed for the vehicle concept. The topology optimization of a virtual wheel suspension takes place in interaction with a continuous, optimal dynamics vehicle control.
    Keywords: Topologie-Optimierung. radselektiv angesteuerten Fahrzeug; Fahrzeugführungsregelung; Optimierung; Topology optimization; wheel-selectively controlled vehicle; vehicle guidance control; optimization ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 97
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-14
    Description: Mathematical optimization techniques are among the most successful tools for controlling technical systems optimally with feasibility guarantees. Yet, they are often centralized—all data has to be collected in one central and computationally powerful entity. Methods from distributed optimization overcome this limitation. Classical approaches, however, are often not applicable due to non-convexities. This work develops one of the first frameworks for distributed non-convex optimization.
    Keywords: Verteilte Optimierung ; Dezentrale Optimierung ; ALADIN ; ADMM ; Optimal Power Flow ; distributed optimization ; decentralized optimization ; optimal power flow ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 98
    Publication Date: 2024-04-11
    Description: This work focuses on two topics. The first is the investigation of producing filaments on copper-stabilized coated conductors, with striations made after or before electroplating the tape. The second topic is the applicability of the striations for reducing the AC losses of cables, in particular the CORC® and RACC cables, which are made with high-temperature superconductor (HTS) striated tapes.
    Keywords: AC-Verlustmessung; AC-Magnetisierungsverluste; Hochtemperatursupraleiter; Multifilament-Supraleiter; HTS-Kabel; AC loss measurement; AC magnetization losses; high-temperature superconductors; multifilamentary superconductors; HTS cables ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 99
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    KIT Scientific Publishing | KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: Integrated photonic sensor systems are miniaturized, mass-producible devices that leverage the mature semiconductor fabrication technology and a well-established ecosystem for photonic circuits. This book aims at a holistic treatment of waveguide-based photonic sensor systems by analyzing photonic waveguide design, photonic circuit design and readout design. Across all levels, a special emphasis is given to system-level performance optimization under realistic environmental conditions.
    Keywords: Optik ; Photonik ; Optoelektronik ; Sensoren ; Wellenleiter ; Optics ; Photonics ; Optoelectronics ; Sensors ; Waveguides ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 100
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    KIT Scientific Publishing
    Publication Date: 2024-04-11
    Description: This work deals with the material degradation of LED package materials and their contribution to degradation of the whole LED device. The occurring failure modes within the LED package are described and predicted by the degradation of the used package materials. Based on these findings approaches for long lifetime LEDs are derived.
    Keywords: LED; Lebensdauer; Temperatur; Materialalterung; Beschleunigte Alterung; light-emitting-diode; lifetime; temperature; material degradation; accelerated testing ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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