TY  - CHAP
A1  - Leise, Philipp
A1  - Simon, Nicolai
A1  - Altherr, Lena
T1  - Comparison of Piecewise Linearization Techniques to Model Electric Motor Efficiency Maps: A Computational Study
T2  - Operations Research Proceedings 2019
N2  - To maximize the travel distances of battery electric vehicles such as cars or buses for a given amount of stored energy, their powertrains are optimized energetically. One key part within optimization models for electric powertrains is the efficiency map of the electric motor. The underlying function is usually highly nonlinear and nonconvex and leads to major challenges within a global optimization process. To enable faster solution times, one possibility is the usage of piecewise linearization techniques to approximate the nonlinear efficiency map with linear constraints. Therefore, we evaluate the influence of different piecewise linearization modeling techniques on the overall solution process and compare the solution time and accuracy for methods with and without explicitly used binary variables.
KW  - MINLP
KW  - Powertrain
KW  - Piecewise linearization
KW  - Efficiency optimization
Y1  - 2020
SN  - 978-3-030-48439-2
SN  - 978-3-030-48438-5
U6  - https://doi.org/10.1007/978-3-030-48439-2_55
N1  - Annual International Conference of the German Operations Research Society (GOR), Dresden, Germany, September 4-6, 2019
SP  - 457
EP  - 463
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Elgamal, Abdelrahman
A1  - Heuermann, Holger
T1  - Design and Development of a Hot S-Parameter Measurement System for Plasma and Magnetron Applications
T2  - Proceedings of the 2020 German Microwave Conference
N2  - This paper presents the design, development and calibration procedures of a novel hot S-parameter measurement system for plasma and magnetron applications with power level up to 6 kW. Based on a vector network analyzer, a power amplifier and two directional couplers, the input matching hotS 11 and transmission hotS 21 of the device under test are measured at 2.45 GHz center frequency and 300MHz bandwidth, while the device is driven by the magnetron. This measurement system opens a new horizon to develop many new industrial applications such as microwave plasma jets, dryer systems, dryers and so forth. Furthermore, the developing, controlling and monitoring a 2kW 2.45GHz plasma jet and a dryer system using the measurement system are presented and explained.
Y1  - 2020
SN  - 978-3-9820397-1-8
N1  - 13th German Microwave Conference 2020, March 09–11, Cottbus
SP  - 124
EP  - 127
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Leise, Philipp
A1  - Breuer, Tim
A1  - Altherr, Lena
A1  - Pelz, Peter F.
T1  - Development, validation and assessment of a resilient pumping system
T2  - Proceedings of the Joint International Resilience Conference, JIRC2020
N2  - The development of resilient technical systems is a challenging task, as the system should adapt automatically to unknown disturbances and component failures. To evaluate different approaches for deriving resilient technical system designs, we developed a modular test rig that is based on a pumping system. On the basis of this example
system, we present metrics to quantify resilience and an algorithmic approach to improve resilience. This approach enables the pumping system to automatically react on unknown disturbances and to reduce the impact of component failures. In this case, the system is able to automatically adapt its topology by activating additional valves. This enables the system to still reach a minimum performance, even in case of failures. Furthermore, timedependent disturbances are evaluated continuously, deviations from the original state are automatically detected and anticipated in the future. This allows to reduce the impact of future disturbances and leads to a more resilient
system behaviour.
KW  - water supply system
KW  - fault detection
KW  - anticipation strategy
Y1  - 2020
SN  - 978-90-365-5095-6
N1  - Joint International Resilience Conference 2020. Interconnected: Resilience Innovations for Sustainable Development Goals. 23 - 27 November, 2020, Singapore
SP  - 97
EP  - 100
ER  - 
TY  - JOUR
A1  - Hüning, Felix
A1  - Backes, Andreas
T1  - Direct observation of large Barkhausen jump in thin Vicalloy wires
JF  - IEEE Magnetics Letters
Y1  - 2020
SN  - 1949-307X
U6  - https://doi.org/10.1109/LMAG.2020.3046411
VL  - 11
IS  - Art. 2506504
SP  - 1
EP  - 4
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - BOOK
A1  - Mühl, Thomas
T1  - Elektrische Messtechnik: Grundlagen, Messverfahren, Anwendungen
Y1  - 2020
SN  - 978-3-658-29115-0
U6  - https://doi.org/10.1007/978-3-658-29116-7
N1  - gedruckt in der Bereichsbibliothek Eupener Str. unter der Signatur 21 XXA 15(6);
auch als Online-Ressource ISBN 978-3-658-29116-7
PB  - Springer Vieweg
CY  - Wiesbaden
ET  - 6., überarbeitete Auflage
ER  - 
TY  - RPRT
A1  - Thoma, Andreas
A1  - Laarmann, Lukas
A1  - Merkens, Torsten
A1  - Franzke, Till
A1  - Möhren, Felix
A1  - Buttermann, Lilly
A1  - van der Weem, Dirk
A1  - Fischer, Maximilian
A1  - Misch, Philipp
A1  - Böhme, Mirijam
A1  - Röth, Thilo
A1  - Hebel, Christoph
A1  - Ritz, Thomas
A1  - Franke, Marina
A1  - Braun, Carsten
T1  - Entwicklung eines intermodalen Mobilitätskonzeptes für die Pilotregion NRW/Rhein-Maas Euregio und Schaffung voller Kundenakzeptanz durch Transfer von Standards aus dem PKW-Bereich auf ein Flugtaxi : Schlussbericht : Projektakronym: SkyCab (Kategorie B) : Laufzeit in Monaten: 6 : Hauptthema: Kategorie B: Innovative Ideen mit Bezug zu UAS/Flugtaxis
Y1  - 2020
N1  - Förderkennzeichen BMVI 45UAS1027A-F
PB  - FH Aachen
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Hüning, Felix
A1  - De Matteis, Stefan
T1  - Entwicklung eines taktilen HMI für sehbehinderte und blinde Nutzerinnen und Nutzer
JF  - Blind - sehbehindert
Y1  - 2020
SN  - 0176-7836
VL  - 140
IS  - 2
SP  - 9
EP  - 19
PB  - Edition Bentheim
CY  - Würzburg
ER  - 
TY  - JOUR
A1  - Czarnecki, Christian
A1  - Dietze, Christian
T1  - Gestaltungsorientierte Forschung am Beispiel der Referenzmodellierung in der Telekommunikationsindustrie
JF  - HMD Praxis der Wirtschaftsinformatik
N2  - Am Beispiel der Telekommunikationsindustrie zeigt der Beitrag eine konkrete Ausgestaltung anwendungsorientierter Forschung, die sowohl für die Praxis als auch für die Wissenschaft nutzen- und erkenntnisbringend ist. Forschungsgegenstand sind die Referenzmodelle des Industriegremiums TM Forum, die von vielen Telekommunikationsunternehmen zur Transformation ihrer Strukturen und Systeme genutzt werden. Es wird die langjährige Forschungstätigkeit bei der Weiterentwicklung und Anwendung dieser Referenzmodelle beschrieben. Dabei wird ein konsequent gestaltungsorientierter Forschungsansatz verfolgt. Das Zusammenspiel aus kontinuierlicher Weiterentwicklung in Zusammenarbeit mit einem Industriegremium und der Anwendung in vielfältigen Praxisprojekten führt zu einer erfolgreichen Symbiose aus praktischer Nutzengenerierung sowie wissenschaftlichem Erkenntnisgewinn. Der Beitrag stellt den gewählten Forschungsansatz anhand konkreter Beispiele vor. Darauf basierend werden Empfehlungen und Herausforderungen für eine gestaltungs- und praxisorientierte Forschung diskutiert.
KW  - Design Science Research
KW  - Anwendungsorientierter Forschungsansatz
KW  - Praxisprojekte
KW  - Referenzmodellierung
KW  - Enhanced Telecom Operations Map
Y1  - 2020
U6  - https://doi.org/10.1365/s40702-020-00594-y
SN  - 2198-2775
VL  - 57
IS  - 2
SP  - 310
EP  - 323
PB  - Springer Nature
CY  - Cham
ER  - 
TY  - CHAP
A1  - Meck, Marvin M.
A1  - Müller, Tim M.
A1  - Altherr, Lena
A1  - Pelz, Peter F.
T1  - Improving an industrial cooling system using MINLP, considering capital and operating costs
T2  - Operations Research Proceedings 2019
N2  - The chemical industry is one of the most important industrial sectors in Germany in terms of manufacturing revenue. While thermodynamic boundary conditions often restrict the scope for reducing the energy consumption of core processes, secondary processes such as cooling offer scope for energy optimisation. In this contribution, we therefore model and optimise an existing cooling system. The technical boundary conditions of the model are provided by the operators, the German chemical company BASF SE. In order to systematically evaluate different degrees of freedom in topology and operation, we formulate and solve a Mixed-Integer Nonlinear Program (MINLP), and compare our optimisation results with the existing system.
KW  - Engineering optimisation
KW  - Mixed-integer programming
KW  - Industrial optimisation
KW  - Cooling system
KW  - Process engineering
Y1  - 2020
SN  - 978-3-030-48438-5 (Print)
SN  - 978-3-030-48439-2 (Online)
U6  - https://doi.org/10.1007/978-3-030-48439-2_61
N1  - Annual International Conference of the German Operations Research Society (GOR), Dresden, Germany, September 4-6, 2019.
SP  - 505
EP  - 512
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Schneider, Dominik
A1  - Wisselink, Frank
A1  - Nölle, Nikolai
A1  - Czarnecki, Christian
ED  - Bruhn, Manfred
ED  - Hadwich, Karsten
T1  - Influence of artificial intelligence on commercial interactions in the consumer market
T2  - Automatisierung und Personalisierung von Dienstleistungen : Methoden – Potenziale – Einsatzfelder
N2  - Recently, novel AI-based services have emerged in the consumer market. AI-based services can affect the way consumers take commercial decisions. Research on the influence of AI on commercial interactions is in its infancy. In this chapter, a framework creating a first overview of the influence of AI on commercial interactions is introduced. This framework summarizes the findings of comparing numerous customer journeys of novel AI-based services with corresponding non-AI equivalents.
Y1  - 2020
SN  - 978-3-658-30167-5 (Print)
SN  - 978-3-658-30168-2 (Online)
U6  - https://doi.org/10.1007/978-3-658-30168-2_7
SP  - 183
EP  - 205
PB  - Springer Gabler
CY  - Wiesbaden
ER  -