Part of
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.
Umfang: XXIV, 125 S.
Preis: 42.00 €
Buchdetails
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.
Umfang: XXV, 282 S.
Preis: 52.00 €
Buchdetails
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.
Umfang: X, 227 S.
Preis: 58.00 €
Buchdetails
This work addresses the use of commercial off-the-shelf rotor-based unmanned aerial vehicles (UAVs) to facilitate emergency forces in the rapid structural assessment of a disaster site by means of aerial image-based reconnaissance. It proposes a framework that consists of two parts and relies on the integrated stereo vision sensor and the visual payload camera of the UAV to execute three high-level applications that aim at facilitating first responders in disaster relief missions.
Umfang: XXII, 204 S.
Preis: 53.00 €
Buchdetails
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.
Umfang: XIII, 188 S.
Preis: 44.00 €
Buchdetails
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.
Umfang: XLIV, 210 S.
Preis: 58.00 €
Buchdetails
In dieser Arbeit werden zwei Methoden entwickelt und evaluiert, um Wirkketten von automobilen Lichtfunktionen an simulationsbasierten Testsystemen zu integrieren und zu testen. Der Fokus liegt zunächst auf einem Ansatz zur effizienten Lichtnutzung für die Darstellung hoher Kontraste in virtuellen Nachtfahrten mit realer Fahrerassistenzkamera. Im Weiteren wird eine Testmethode erarbeitet, um pixelbasierte Lichtfunktionen an einem Hardware-in-the-Loop Testsystem basierend auf Metriken zu bewerten. 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.
Umfang: VI, 172 S.
Preis: 41.00 €
Buchdetails
Bildverarbeitung verknüpft das Fachgebiet die Sensorik von Kameras – bildgebender Sensorik – mit der Verarbeitung der Sensordaten – den Bildern. Daraus resultiert der besondere Reiz dieser Disziplin. Der vorliegende Tagungsband des „Forums Bildverarbeitung“, das am 24. und 25.11.2022 in Karlsruhe als Veranstaltung des Karlsruher Instituts für Technologie und des Fraunhofer-Instituts für Optronik, Systemtechnik und Bildauswertung stattfand, enthält die Aufsätze der eingegangenen Beiträge.
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.
Umfang: VII, 226 S.
Preis: 46.00 €
Buchdetails
In den vergangenen Jahren hat OFDM im Radarbereich immer mehr an Bedeutung gewonnen. Ein Nachteil ist jedoch die Notwendigkeit hoher Abtastraten, weshalb das Frequency-Comb-OFDM-Radar-Verfahren genau an diesem Punkt ansetzt. Mit dessen Hilfe kann die Signalbandbreite vergrößert werden, ohne gleichzeitig die Abtastraten erhöhen zu müssen. Hierdurch kann trotz eines Verzichts auf schnelle Wandler eine hohe Entfernungsauflösung erreicht werden.
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.
Umfang: XXVI, 234 S.
Preis: 49.00 €
Buchdetails
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.
Umfang: XIV, 197 S.
Preis: 43.00 €
Buchdetails
