@inproceedings{OPUS4-5715, title = {19th EEEIC International Conference on Environment and Electrical Engineering - Student Edition : Cottbus-Ostrava-Wrocław, June 2020}, editor = {Schwarz, Harald and Janik, Przemyslaw and Gono, Radomir and Lehmann, Dirk}, doi = {10.26127/BTUOpen-5715}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-57157}, year = {2020}, abstract = {In the time of increased awareness about the environment problems by the public opinion and also intensive international efforts to reduce emissions of greenhouse gases, as well increase of the generation of electrical energy to facilitate industrial growth, the conference offers broad contribution towards achieving the goals of diversification and sustainable development. Focus of the student conference is to promote the discussion of views from scientists and students from Wroclaw University of Technology, Technical University of Ostrava and Brandenburg University of Technology Cottbus-Senftenberg. The conference offers prominent academics and industrial practitioners from all over the world the forum for discussion about the future of electrical energy and environmental issues and presents a base for identifying directions for continuation of research.}, subject = {Energy resources; Energy system transformation; Elektrische Energie; Energietechnik; Energievorrat; Umweltbezogenes Management; Environmental management; Power quality; Energiequalit{\"a}t; Energieressourcen; Energietechnik; Energiewende; Umweltmanagement}, language = {en} } @inproceedings{OPUS4-5215, title = {19th EEEIC International Conference on Environment and Electrical Engineering - Student Edition : Cottbus-Ostrava-Wrocław, June 2020}, editor = {Schwarz, Harald and Janik, Przemysław and Gono, Radomir and Lehmann, Dirk}, isbn = {978-3-940471-55-0}, doi = {10.26127/BTUOpen-5215}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-52154}, year = {2020}, abstract = {In the time of increased awareness about the environment problems by the public opinion and also intensive international efforts to reduce emissions of greenhouse gases, as well increase of the generation of electrical energy to facilitate industrial growth, the conference offers broad contribution towards achieving the goals of diversification and sustainable development. Focus of the student conference is to promote the discussion of views from scientists and students from Wroclaw University of Technology, Technical University of Ostrava and Brandenburg University of Technology Cottbus-Senftenberg. The conference offers prominent academics and industrial practitioners from all over the world the forum for discussion about the future of electrical energy and environmental issues and presents a base for identifying directions for continuation of research.}, subject = {Energy resources; Environmental management; Power quality; Energy system transformation; Energieressourcen; Energiewende; Umweltmanagement; Energietechnik; Energiequalit{\"a}t; Elektrische Energie; Energietechnik; Energievorrat; Umweltbezogenes Management}, language = {en} } @phdthesis{Apte2020, author = {Apte, Anisha}, title = {A new analytical design method of ultra-low-noise voltage controlled VHF crystal oscillators and it's validation}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-51386}, school = {BTU Cottbus - Senftenberg}, year = {2020}, abstract = {The design of high Q oscillators, using Crystals at lower frequencies, (and dielectric resonators at much higher frequencies), has long been considered a black art. This may be due to the fact that a systematic approach with optimized design guideline for crystal oscillators could not be found after extensive literature search. In this dissertation, after analyzing the first crystal oscillator by W.G. Cady (1921), other high performance crystal oscillators will be discussed, analyzed and calculated. A single transistor crystal oscillator design as used by HP (Hewlett Packard) in one of their designs, the HP10811A is considered in this thesis for mathematical analysis and CAD (Computer aided Design) simulation. This was also measured on state-of-the-art signal source analyzer. After validation, this design is scaled to 100MHz, the frequency of interest for this dissertation. Though most designers use a single transistor based oscillator circuit, it is not an optimized design because of limited control over key design parameters such as loop gain, dc current etc. This dissertation is an attempt to overcome the limitation due to the single transistor circuit and to give a step by step procedure, explaining the significance of a two transistor design with thorough analysis and design simulation results. This two stage transistor circuit is also not yet a best solution in terms of phase noise performance and output power, and some add-on circuitry will be needed for an optimized performance. An important contribution of this work is to show that since the voltage gain is the ratio of the collector resistor and the emitter resistor, the performance is practically independent of the VHF transistor and gives better control over various parameters of the oscillator, in order to optimize the design. A grounded-base amplifier is then introduced and added for improving the isolation and the output power. Unlike most oscillators, that take the output from the collector, a novel concept introduced by Rohde [14], is incorporated here, where the crystal is used as a filter that is then connected to the grounded base amplifier, a technique which many companies have been using. This dissertation will show that this technique increases the output power without significantly affecting the phase noise. Such a validation is needed for better understanding and as per my knowledge, has not been done so far. For the oscillator, the tuning diode sensitivity and flicker noise contribution are also taken into consideration, by calibrating the mathematics and its validation is shown. Crystal resonators of the type AT and stress-compensated (SC) cut devices will be considered as they give the best performance. The one port Colpitts type oscillator is considered first and the two port two transistor design later. Both will need a post amplifier/buffer stage. A complete step by step design procedure for an optimized 100MHz crystal oscillator is then presented. For completeness, CAD Simulation and Experimental results are provided for 10 MHz, 128 MHz and 155 MHz VCO circuits.}, subject = {Quartz crystal; Crystal oscillator; Phase noise; Reference source; Voltage controlled; Quarzkristall; Kristalloszillator; Phasenrauschen; Referenzquelle; Spannungsgesteuert; Quarzoszillator; UKW; CAD}, language = {en} } @techreport{OclooFuegenschuhPamen2020, type = {Working Paper}, author = {Ocloo, Valentina E. and F{\"u}genschuh, Armin and Pamen, Olivier M.}, title = {A new mathematical model for a 3D container packing problem}, editor = {F{\"u}genschuh, Armin}, issn = {2627-6100}, doi = {10.26127/BTUOpen-5088}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-50880}, year = {2020}, abstract = {Wir betrachten das Problem der Einzelcontainerpackung eines Unternehmens, das seine Kunden bedienen muss, indem es zuerst die Produkte in Kartons legt und diese dann in einen Container l{\"a}dt. F{\"u}r dieses Problem entwickeln und l{\"o}sen wir ein lineares gemischt-ganzzahliges Modell. Unser Modell ber{\"u}cksichtigt geometrische Randbedingungen, beispielsweise {\"U}berlappungsverbote, Orientierungs-Bedingungen und Randbedingungen f{\"u}r die relative Positionierung der Kartons. Wir betrachten auch die Erweiterung des Modells durch die Integration der Schwerpunktsabweichung der Packung vom Containermittelpunkt. Das Modell wurde an einer großen Anzahl von realen Instanzen getestet, die bis zu 41 Kartons enthalten. In den meisten F{\"a}llen wurden optimale L{\"o}sungen erzielt bzw. nah-optimale L{\"o}sungen mit beweisbar kleiner Optimalit{\"a}tsl{\"u}cke.}, subject = {Container packing problem; Mixed-integer programming; Box orientation; Non-overlapping; Center of gravity deviation; Optimierungsproblem; Container; Lineare Optimierung; Logistik}, language = {en} } @misc{OPUS4-5260, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2020,10 (29.09.2020)}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-52600}, year = {2020}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Architektur vom 28. September 2020 (ersetzt AMbl. 17/2016 ; s. AMbl 20/2022)}, language = {de} } @misc{OPUS4-5261, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2020,11 (29.09.2020)}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-52617}, year = {2020}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Maschinenbau mit universit{\"a}rem Studienprofil vom 28. September 2020 (ersetzt durch AMbl 23/2021)}, language = {de} } @misc{OPUS4-5262, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2020,12 (30.09.2020)}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-52622}, year = {2020}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Verfahrenstechnik - Prozess- und Anlagentechnik vom 28. September 2020 (ersetzt Abl. 06/2009)}, language = {de} } @misc{OPUS4-5263, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2020,13 (30.09.2020)}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-52630}, year = {2020}, abstract = {Neufassung der Satzung zur Evaluation von Lehre und Studium im Rahmen des Qualit{\"a}tsmanagements an der Brandenburgischen Technischen Universit{\"a}t Cottbus-Senftenberg vom 28. September 2020 (ersetzt AMbl. 06/2017)}, language = {de} } @misc{OPUS4-5267, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2020,14 (30.09.2020)}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-52672}, year = {2020}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Wirtschaftsrecht f{\"u}r Technologieunternehmen vom 30. September 2020 (ersetzt Abl. 04/2006, Abl. 05/2007, Abl. 18/2011) (s. dazu 1. {\"A}nderungssatzung AMbl 06/2022)}, language = {de} } @misc{OPUS4-5286, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2020,15 (27.10.2020)}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-52862}, year = {2020}, abstract = {1. Erste {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den universit{\"a}ren Bachelor-Studiengang Elektrotechnik vom 23. Oktober 2020 (s. AMbl 21/2022) 2. Erste {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den universit{\"a}ren Master-Studiengang Elektrotechnik vom 23. Oktober2020 (ersetzt Abl. 14/2006, AMbl. 01/2014, AMbl. 09/2014)}, language = {de} }