TY - JOUR A1 - Kretschmar, Dominik A1 - Schmieder, Matthias A1 - Niemann, Jörg T1 - Knowledge Management Concept to Compensate a High Employee Fluctuation JF - Acta Technica Napocensis. Series: Applied Mathematics, Mechanics and Engineering N2 - Knowledge is our most valuable asset! Due to the increasing fluctuation caused by demographic change, the change in society and the industry, companies are increasingly confronted with knowledge management. Therefore, companies have problems with carrying out projects effectively. There are several models, methods and tools to develop an effective concept for knowledge management. Can the process capability of projects be ensured despite high fluctuation? What appropriate methods and tools are available to manage knowledge? These and more questions are clarified in the course of this work and presented in a conceptual proposal. KW - knowledge management KW - Wissensmanagement KW - project management KW - Projektmanagement KW - collaboration KW - Kollaboration Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-44818 UR - https://atna-mam.utcluj.ro/index.php/Acta/article/view/1031 VL - 61 IS - III SP - 483 EP - 488 ER - TY - CHAP A1 - Jäger, Lukas A1 - Hart, Scott A1 - Reguera, Remo A1 - Grote-Ramm, Wolfgang A1 - Neef, Matthias T1 - Autonome Nachführungssteuerung eines Parabolrinnen-Teststands mittels Microcontroller T2 - Beitrag zur 7. Regenerativen Energietechnik Konferenz, Nordhausen, 08. - 09. Februar 2024 N2 - Parabolrinnen nutzen parabolisch gekrümmte Spiegel, um die direkte Globalstrahlung auf ein Vakuum-Absorberrohr zu konzentrieren. Eine Effizienzsteigerung dieser Technologie wird durch eine vollständige Automatisierung der Sonnennachführung optimiert. Die an einem Parabolrinnen-Versuchsträger der Hochschule Düsseldorf realisierte Steuerung und Berechnung der Nachführung werden kontinuierlich über einen Microcontroller realisiert. Eine Kalibrierung der Parabolrinne im Labormaßstab zur Erkennung des Winkels erfolgt über Infrarotsensoren. Die Berechnung des Sonnenstandes, durch den Algorithmus, kann unabhängig von einer Stromzufuhr durch eine Real-Time-Clock bestimmt werden. Mittels Schrittmotor und Treiber verfährt die Parabolrinne in die errechnete Position. Die Feinausrichtung der Parabolrinne erfolgt über ein Verschattungsmodul und zwei Photowiderstände. Durch den Einsatz von 3D-gedruckten Bestandteilen sind die genutzten Komponenten kostengünstig und können standortunabhängig reproduziert werden. Durch das Zusammenspiel der Komponenten ist ein autonomer Einsatz möglich. KW - Parabolrinnen KW - Sonnenenergie KW - Microcontroller Y1 - 2024 CY - Nordhausen ER - TY - CHAP A1 - Dörr, Dominik A1 - Münch, Justin A1 - Adam, Mario ED - Wesselak, Viktor T1 - Hochaufgelöste Langzeitprognose des deutschen Strom-Importpotenzials mithilfe von Methoden des Maschinellen Lernens T2 - RET.Con 2024. 7. Regenerative Energietechnik Konferenz in Nordhausen, 08.-09. Februar 2024. Tagungsband KW - KIVi Y1 - 2024 SN - 978-3-940820-23-5 SP - 71 EP - 78 CY - Nordhausen ER - TY - INPR A1 - Münch, Justin A1 - Priesmann, Jan A1 - Reich, Marius A1 - Tillmanns, Marius A1 - Praktiknjo, Aaron A1 - Adam, Mario T1 - Uplifting the Complexity of Analysis for Probabilistic Security of Electricity Supply Assessments Using Artificial Neural Networks KW - KIVi Y1 - 2024 U6 - https://doi.org/10.2139/ssrn.4770407 PB - Elsevier ER - TY - JOUR A1 - Barbashov, Maksim A1 - Gellings, Markus A1 - Özen, Semih A1 - Jahr, Andreas T1 - Hochgeschwindigkeitsverschleißtests an Scheibenmähwerkmessern verschiedener Hersteller nach der Verschleißtopfmethode JF - Agricultural engineering.eu N2 - Rotary mowers are ofen used for forage harvesting in agriculture, as this technology can achieve a high throughput. These knives are therefore exposed to high levels of wear and tear, and will also be ofen changed because of loss of material by bad cutting quality. That is why it is interesting to save costs during manufacturing in spite of a correspondingly long service life. This research records the current manufacturing quality of the mower blades and examines how they behave in comparison. Based on the obtained results, further decisions on the methods, procedures and ways of extending the life of the disc mower blades should be proposed. For the investigations, a test bench based on a wear pot was used. The wear that occurs on the blade is determined using several parameters and compared accordingly. The parameters of the test setup determined as a result of the test can be used for further studies of wear resistance. N2 - Bei der Grünfutterernte in der Landwirtschaft werden häufig Scheibenmähwerke eingesetzt, um einen hohen Durchsatz zu erzielen. Die dabei eingesetzten Messer sind einem hohen Verschleiß ausgesetzt und werden häufig wegen Verschleiß gewechselt, was sich in einer schlechten Schnittqualität widerspiegelt. Daher ist es interessant, bereits im Produktionsprozess Kosten einzusparen, ohne dabei die Lebensdauer der Messer zu beeinträchtigen. Diese Studie erfasst die aktuelle Fertigungsqualität von Mähmessern und untersucht, wie sie sich im Vergleich verhalten. Anhand der Ergebnisse sollen weitere Entscheidungen über Methoden, Verfahren und Wege zur Verlängerung der Lebensdauer von Rotorklingen vorgeschlagen werden. Für die Untersuchungen wurde ein Prüfstand auf der Basis des Verschleißtopfverfahrens verwendet. Der am Messer auftretende Verschleiß wird anhand mehrerer Parameter ermittelt und entsprechend verglichen. Die aus den Untersuchungen gewonnenen Parameter können für weiterführende Verschleißuntersuchungen genutzt werden. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-44709 SN - 2943-5641 VL - 79 IS - 2 SP - 95 EP - 115 PB - Kuratorium für Technik und Bauwesen in der Landwirtschaft e. V. (KTBL) ER - TY - RPRT A1 - Deckert, Carsten T1 - Good Vibrations from Electronic Circuits: The Technological Development of the Synthesizer T3 - Business Cases in Industrial Engineering - 4 Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-44394 SN - 2941-4075 ER - TY - JOUR A1 - Priesmann, Jan A1 - Münch, Justin A1 - Tillmanns, Marius A1 - Ridha, E. A1 - Spiegel, T. A1 - Reich, Marius A1 - Adam, Mario A1 - Nolting, L. A1 - Praktiknjo, Aaron T1 - Artificial intelligence and design of experiments for resource adequacy assessment in power systems JF - Energy Strategy Reviews KW - KiVi KW - Design of experiments KW - Resource adequacy KW - Security of supply KW - Artificial intelligence Y1 - 2024 U6 - https://doi.org/10.1016/j.esr.2024.101368 SN - 2211-467X VL - 53 PB - Elsevier ER - TY - GEN T1 - 918 - Neubekanntmachung der Prüfungsordnung für den Masterstudiengang „Umweltingenieurwesen“ an der Hochschule Düsseldorf vom 29.02.2024 N2 - Nachstehend wird der Wortlaut der Prüfungsordnung für den Masterstudiengang „Simulations- und Experimentaltechnik“ an der Hochschule Düsseldorf vom 17.06.2021 (Verkündungsblatt der Hoch-schule Düsseldorf, Amtliche Mitteilung Nr. 786) unter ihrer neuen Überschrift neu bekannt gemacht. Die Neubekanntmachung berücksichtigt die Erste Satzung zur Änderung der Prüfungsordnung für den Masterstudiengang „Simulations- und Experimentaltechnik“ an der Hochschule Düsseldorf vom 02.03.2022 (Verkündungsblatt der Hochschule Düsseldorf, Amtliche Mitteilung Nr. 829) sowie die Zweite Satzung zur Änderung der Prüfungsordnung für den Masterstudiengang „Simulations- und Ex-perimentaltechnik“ an der Hochschule Düsseldorf vom 14.02.2024 (Verkündungsblatt der Hochschule Düsseldorf, Amtliche Mitteilung Nr. 915). T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 918 KW - Amtliche Mitteilungen KW - Prüfungsrecht KW - Prüfungsordnung KW - Master Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-43362 CY - Düsseldorf ER - TY - GEN T1 - 915 - Zweite Satzung zur Änderung der Prüfungsordnung für den Masterstudiengang „Simulations- und Experimentaltechnik“ an der Hochschule Düsseldorf vom 14.02.2024 N2 - Aufgrund der §§ 2 Abs. 4, 64 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat die Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 915 KW - Amtliche Mitteilung Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-43283 CY - Düsseldorf ER - TY - GEN T1 - 914 - Zweite Satzung zur Änderung der Prüfungsordnung für die Bachelorstudiengänge „Energie- und Umwelttechnik“ (EUT), „Umwelt- und Verfahrenstechnik“ (UVT), „Maschinenbau Produktentwicklung“ (MPE), „Maschinenbau Produktionstechnik“ (MPT) und „Wirtschaftsingenieurwesen Maschinenbau“ (WIM) an der Hochschule Düsseldorf vom 14.02.2024 N2 - Aufgrund der §§ 2 Abs. 4, 64 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat die Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 914 KW - Amtliche Mitteilung Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-43278 CY - Düsseldorf ER - TY - CHAP A1 - Grote-Ramm, Wolfgang A1 - Schönig, Felix A1 - Schwarzbözl, Peter A1 - Drexelius, Maximilian A1 - Maldonado Quinto, Daniel A1 - Binder, Matthias T1 - Model Predictive Control and Service Life Monitoring for Molten Salt Solar Power Towers T2 - 29th SolarPACES Conference, Sydney N2 - A two-component system for control and monitoring of solar power towers with molten salt receivers is proposed. The control component consists of a model predictive control applica-tion (MPC) with a flexible objective function and on-line tunable weights, which runs on a In-dustrial PC and uses a reduced order dynamic model of the receiver’s thermal and flow dy-namics. The second component consists of a service-life monitoring unit, which estimates the service-life consumption of the absorber tubes depending on the current mode of operation based on thermal stresses and creep fatigue in the high temperature regime. The calculation of stresses is done based on a detailed finite element study, in which a digital twin of the re-ceiver was developed. By parallelising the model solver, the estimation of service-life con-sumption became capable of real-time operation. The system has been implemented at a test facility in Jülich, Germany, and awaits field experiments. In this paper, the modeling and archi-tecture are presented along simulation results, which were validated on a hardware-in-the-loop test bench. The MPC showed good disturbance rejection while respecting process variable constraints during the simulation studies. KW - Solar Power Tower KW - Molten Salt KW - Model Predictive Control KW - Dynamic Modelling KW - Service-life Monitoring Y1 - 2023 N1 - Eingereichter Beitrag ER - TY - RPRT A1 - Deckert, Carsten A1 - Kretschmar, Dominik A1 - Plagge, Christoph T1 - Auf einen gemeinsamen Nenner gebracht? – Reporting der Treibhausgas-Emissionen der Logistikunternehmen in Deutschland T3 - Working Papers in Industrial Engineering - 6 KW - Logistik KW - Nachhaltigkeit KW - Treibhausgasemissionen Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-43130 SN - 2627-8375 CY - Düsseldorf ER - TY - JOUR A1 - Uffmann, Kai A1 - Abicht, Claus A1 - Grote, Wolfgang A1 - Quick, Harald H. A1 - Ladd, Mark E. T1 - Design of an MR-compatible piezoelectric actuator for MR elastography JF - Concepts in Magnetic Resonance Part A: Bridging Education and Research N2 - Magnetic Resonance (MR) elastography is a method for measuring tissue elasticity via phase images acquired with an MR scanner. The propagation of periodic mechanical waves through the tissue can be captured by means of a modified phase contrast sequence. These waves are generated with a mechanical oscillator (actuator) and coupled into the tissue through the skin. The actuator must be capable of generating a sinusoidal excitation with excellent phase and amplitude stability, while not disturbing the MR imaging process. In this work, an actuator based on a piezoelectric principle was developed. Based on the imaging evaluation of several material samples, the housing for the piezoelectric ceramic was constructed of aluminum. Smaller parts of the housing were manufactured from brass and titanium to fulfill the mechanical constraints. A lever was used to transfer the oscillation generated by the piezoelectric ceramic to the point of excitation. The lever amplifies the piezoelectric motion, allowing for a more compact design. Three different lever designs were characterized by an acceleration sensor both outside and inside the magnet. It was shown that the rigidity of the lever, as determined by its material and form, was decisive in determining the resonant frequency of the system and therefore the maximum practical frequency of operation. It was also shown that the motion of the oscillator is unaffected by the electromagnetic fields of the MR imager. The final design can be placed directly in the magnet bore within a few centimeters of the tissue volume to be imaged without generating significant artifacts. An amplitude range of 0–1 mm in the frequency range from 0 to over 300 Hz was achieved, sufficient for performing most MR elastography applications. © 2002 Wiley Periodicals, Inc. Concepts in Magnetic Resonance (Magn Reson Engineering) 15: 239–254, 2002 KW - Elasticity KW - Elastography KW - Actuator KW - MRI KW - Piezoelectric Y1 - 2002 UR - 1552-5023 U6 - https://doi.org/https://doi.org/10.1002/cmr.10045 VL - 15 IS - 4 SP - 239 EP - 254 PB - Wiley ER - TY - JOUR A1 - Galban, Craig A1 - Maderwald, Stefan A1 - Herrmann, Burkhard A1 - Brauck, K. A1 - Grote, Wolfgang A1 - de Greiff, A. A1 - Uffmann, K. A1 - Ladd, M. T1 - Measuring Skeletal Muscle Elasticity in Patients with Hypogonadism by MR Elastography JF - Proc. Intl. Soc. Mag. Reson. Med. N2 - Men afflicted with hypogonadism have reduced fat-free mass and in some cases a loss in muscle strength. We hypothesize that muscle elasticity of the lower extremities differs between patients with hypogonadism and healthy controls. The shear modulus of the soleus muscle was measured non-invasively using MR elastography (MRE) at 0%, 5%, 10%, 15%, and 20% of the subject’s maximum applied force. The results from this study showed statistical differences between the patients and controls, even though there were no statistical differences in applied force. Y1 - 2005 UR - https://cds.ismrm.org/protected/05MProceedings/PDFfiles/02016.pdf VL - 13 SP - 2016 ER - TY - JOUR A1 - Galban, Craig A1 - Maderwald, Stefan A1 - Eggebrecht, Holger A1 - Grote, Wolfgang A1 - de Greiff, A. A1 - Uffmann, K. A1 - Ladd, M. E. T1 - Monitoring the Effects of Chronic Obstructive Pulmonary Disease on Muscle Elasticity by MR Elastography JF - Proc. Intl. Soc. Mag. Reson. Med. N2 - Men afflicted with chronic obstructive pulmonary disease (COPD) show signs of muscle dysfunction, such as increased muscle fatigue and acidosis during exercise. We hypothesize that muscle elasticity of the lower extremities differs between patients with COPD and age-related controls. The shear modulus of the soleus muscle was measured non-invasively using MR elastography (MRE) at 0%, 5%, 10%, 15%, and 20% of the subject’s maximum applied force. The results from this study showed statistical differences between the patients and controls, even though there were no statistical differences in the maximum applied force. Y1 - 2005 UR - https://cds.ismrm.org/protected/05MProceedings/PDFfiles/02015.pdf VL - 13 SP - 2015 ER - TY - JOUR A1 - Beyer, Marc-André A1 - Grote, Wolfgang A1 - Reinig, Gunter T1 - Adaptive exact linearization control of batch polymerization reactors using a Sigma-Point Kalman Filter JF - Journal of Process Control N2 - The Chylla–Haase polymerization reactor is widely accepted as a benchmark process for the evaluation of control strategies for batch reactors. In this contribution a control concept based on Exact I/O-Linearization is proposed and compared to a conventional cascade control structure. In order to adapt the exact linearization control strategy to various polymerization products and batch conditions, an advanced probabilistic inference algorithm (Sigma-Point Kalman Filter) is applied and investigated. Sigma-Point Kalman Filters have the major improvement of simplified implementation compared to local linearization methods (i.e. Extended Kalman Filter) because no analytical Jacobians are required. Stochastic simulation studies are introduced and show the effectiveness, accuracy and benefit of the control concept. Within several scenarios a satisfying robustness against structural errors in the underlying model equations for the nonlinear control law and the inference algorithm is demonstrated. Furthermore it is pointed out, that with little effort in reassembling the plant design, control performance can be improved significantly. KW - Batch process operation KW - Exact I/O-Linearization control KW - Online parameter estimation KW - Sigma-Point Kalman Filter Y1 - 2008 UR - 1873-2771 U6 - https://doi.org/10.1016/j.jprocont.2007.12.002 VL - 18 IS - 7-8 SP - 663 EP - 675 PB - Elsevier ER - TY - THES A1 - Grote, Wolfgang T1 - Ein Beitrag zur modellbasierten Regelung von Entnahmedampfturbinen KW - Dynamische Modellierung KW - Dampfturbine KW - Prädiktive Regelung KW - Dampfkraftwerk Y1 - 2009 UR - https://hss-opus.ub.ruhr-uni-bochum.de/opus4/2109 PB - Bochum ER - TY - CHAP A1 - Grote, Wolfgang A1 - Schulze Darup, M. A1 - Reinig, G. T1 - Modellprädiktive Regelung von Entnahmeturbinen und Dampfnetzen (Poster) T2 - Chemie Ingenieur Technik Y1 - 2009 U6 - https://doi.org/10.1002/cite.200950184 VL - 2009 IS - 8 SP - 1113 EP - 1114 PB - Wiley CY - Weinheim ER - TY - CHAP A1 - Grote, Wolfgang A1 - Reinig, Gunter T1 - Modellbasierte Regelung von Entnahmedampfturbinen (eingeladener Vortrag) T2 - 43. Regelungstechnisches Kolloquium in Boppard vom 25.-27. Februar 2009 KW - Modellierung von Dampfturbinen KW - Modellprädiktive Regelung KW - Generische Modelle KW - MIMO Regelung KW - Betriebsartenspezifische Regelung Y1 - 2009 UR - https://www.iosb.fraunhofer.de/content/dam/iosb/iosbtest/documents/veranstaltungen/boppard-regelungstechnisches-kolloquium/Programm_2009.pdf ER - TY - CHAP A1 - Grote, Wolfgang A1 - Kastsian, Darya A1 - Mönnigmann, Martin T1 - Optimal power system unit commitment with guaranteed local stability T2 - Proceedings of the 2011 American Control Conference N2 - This article deals with the cost optimal commitment of power systems. System stability is often only considered after solving the commitment problem. We show by example that a cost optimization may result in a mode of operation that, while economically optimal, is unstable or has otherwise unacceptable dynamics. As a remedy, we propose to use the so-called normal vector method, which has been developed for the optimization of nonlinear dynamical systems with stability boundaries and uncertain parameters. We apply the method to a small sample power grid, where the optimization goal is to minimize the energy production costs for a given power consumption. KW - Optimization KW - Power system stability KW - Robustness Y1 - 2011 U6 - https://doi.org/10.1109/ACC.2011.5991058 SN - 2378-5861 SP - 4526 EP - 4531 PB - IEEE ER - TY - JOUR A1 - Grote, Wolfgang A1 - Kastsian, Darya A1 - Mönnigmann, Martin T1 - Guaranteed stability in optimal power generation dispatching under uncertainty JF - IEEE Transactions on Power Systems N2 - Stability and cost optimality of power generation and supply systems must not be considered independently from one another. Simple examples show that optimizing cost without considering stability may result in modes of operation that, while economically optimal, are unstable. We demonstrate that stability, robustness, and optimality can be considered systematically and simultaneously by combining bifurcation theory and nonlinear optimization. Essentially, the proposed method enforces a backoff distance between the optimal point of operation and operational or stability boundaries in the space of the optimization variables, where bifurcation theory is used to describe nonlinear stability boundaries. KW - Normal vector method KW - Power dispatch KW - Robust optimization KW - Stability KW - Unit commitment Y1 - 2013 U6 - https://doi.org/10.1109/TPWRS.2012.2207970 SN - 1558-0679 VL - 28 IS - 2 SP - 1103 EP - 1112 PB - IEEE ER - TY - JOUR A1 - Jost, Michael A1 - Grote, Wolfgang A1 - Möllenbruck, Florian A1 - Mönnigmann, Martin T1 - Plant-wide control of a parabolic trough power plant with thermal energy storage JF - IFAC Proceedings Volumes N2 - We present a control scheme for a parabolic trough power plant that is equipped with a molten salt thermal energy storage system. We show that the multivariable control problem for the solar field can be decoupled by controlling the three way valve that splits the heat transfer fluid between the storage system and the steam generator. The steam generation cycle is regulated with inlet pressure control. The subsystems of the plant are modeled based on first principles, where we focus on the steam generation cycle. A multi-group extraction turbine with pre- and reheater is considered, which is suitable for solar power plants. We demonstrate the benefits of the proposed control scheme with a day-to-day simulation. KW - Control of power plants KW - Solar power plants KW - Thermal energy storage KW - Decoupling control Y1 - 2014 U6 - https://doi.org/10.3182/20140824-6-ZA-1003.00879 SN - 2589-3653 VL - 47 IS - 3 SP - 419 EP - 425 PB - Elsevier ER - TY - JOUR A1 - Mier, Dominik A1 - Möllenbruck, Florian A1 - Jost, Michael A1 - Grote, Wolfgang A1 - Mönnigmann, Martin T1 - Model predictive control of the steam cycle in a solar power plant JF - IFAC-PapersOnLine N2 - We derive a nonlinear model of the steam cycle of a solar power plant, estimate its unknown parameters with measured data, and design a linear model predictive controller based on the resulting model. Simulations show that the linear model predictive controller is able to regulate the electrical power of the nonlinear steam process of the plant to a given reference trajectory very well. Moreover, it results in very good disturbance rejection. KW - Power plant control KW - solar power KW - model predictive control Y1 - 2015 U6 - https://doi.org/10.1016/j.ifacol.2015.09.052 SN - 2405-8963 VL - 48 IS - 8 SP - 710 EP - 715 PB - Elsevier ER - TY - CHAP A1 - Schramm, Alexander A1 - Kruger, Karl A1 - Niemann, Jörg A1 - Grote, Wolfgang ED - Dimitrov, Dimiter ED - Hagedorn-Hansen, Devon ED - Leipzig, Karl von T1 - Possibilities, Limitations and Considerations for Eye Tracking in Industrial Environments: Experience from a Case Study T2 - International Conference on Competitive Manufacturing (COMA 19) proceedings : 30 January 2019-1 February 2019, Stellenbosch, South Africa N2 - Eye tracking is a measurement technique for determining the orientation and viewing direction of an individual’s eyes. It allows for an evaluation of the individual’s gaze and other related information.There is a wide variety of application areas for eye tracking, however the usage in engineeringindustry is still limited. This paper presents a case study for the use of eye tracking in a testingstation for electrical circuit breakers. The case study aims to evaluate the measurement and analysispossible with the Tobii wearable eye tracking system. From the case study, possibilities, limitationsand considerations for eye tracking in industrial settings are identified and discussed. The paperconcludes that while eye tracking can be used to effectively capture and visualize insightfulinformation, it faces major challenges related to subjectivity in analysis and labour intensiveness. KW - Eye Tracking Y1 - 2019 SN - 978-0-7972-1779-9 SP - 390 EP - 396 PB - Department of Industrial Engineering, Stellenbosch University CY - Stellenbosch ER - TY - CHAP A1 - Beckers, Sebastian A1 - Pawlik, Julian A1 - Kiel, Jürgen A1 - Grote, Wolfgang T1 - Simulation von Partikelflugbahnen zur Auslegungshilfe von elektrostatischen Luftfiltern T2 - Tagungsband: ASIM Workshop 2019 - Simulation Technischer Systeme Grundlagen und Methoden in Modellbildung und Simulation, 21.-22. Februar 2019, Braunschweig Y1 - 2019 SN - 978-3-901608-06-3 U6 - https://doi.org/10.11128/arep.57 SP - 147 EP - 152 PB - ARGESIM, ASIM CY - Wien ER - TY - CHAP A1 - Grote-Ramm, Wolfgang A1 - Schönig, Felix T1 - Model Predictive Control of Solar Receivers T2 - 25th Cologne Solar Colloquium (DLR) Y1 - 2022 UR - https://www.dlr.de/sf/PortalData/73/Resources/dokumente/soko/soko2022/DLR_Solar_Colloquium_2022_Model_Predictive_Control_GROTE-RAMM.pdf ER - TY - JOUR A1 - Grote-Ramm, Wolfgang A1 - Lanuschny, David A1 - Lorenzen, Finn A1 - Oliveira Brito, Marcel A1 - Schönig, Felix T1 - Continual learning for neural regression networks to cope with concept drift in industrial processes using convex optimisation JF - Engineering Applications of Artificial Intelligence N2 - Process models in industrial applications, e.g. predictive maintenance or automation, are subject to both divergence from the underlying system due to their time-variant nature and to high complexity resulting from a wide operational range being covered. Hence, regression models require high accuracy for the present system state and at the same time need to be valid across the whole system operating space. While accuracy for the current system state can be gained by updating the model on the current data, the overall validity must often be retrieved from historical or design data. We propose a method to find an appropriate compromise for these two demands. A pre-trained artificial neural network (ANN) is continually updated on the current sensor data stream using convex optimisation. Thus, a unique and optimal solution is generated in each update step, while robust regression accuracy on the domain that is not covered by the arriving data subset is maintained. This is achieved by introducing a data management system to provide some historical data, constraining the optimisation problem and manipulating the architecture of the ANN. Models updated with this method show reasonable stability but display plastic behaviour at the current operating point. KW - Continual learning KW - Concept drift KW - Catastrophic forgetting KW - Convex optimization Y1 - 2023 U6 - https://doi.org/10.1016/j.engappai.2023.105927 SN - 1873-6769 VL - 120 PB - Elsevier CY - New York ER - TY - CHAP A1 - Lorenzen, Finn A1 - Schönig, Felix A1 - Grote-Ramm, Wolfgang A1 - Oliveira Brito, Marcel A1 - Neuberger, Heiko A1 - Sobolyev, Alexander T1 - Continual Adaptation of Compressor Maps During Operation on Measurement Data For Increased Performance of Model-Based Applications in Turbomachinery T2 - ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, June 26–30, 2023 Boston, Massachusetts, USA N2 - Higher control engineering concepts, including artificial intelligence and model-based control, are recently becoming more popular in complex industrial applications because they enable a significant increase in efficiency. E.g., a model-based approach can be used to enhance the control and monitoring of several coupled components of a larger turbomachinery train. This requires dynamic models of the components, including all machine characteristics, which may experience a shift in their behavior over the course of their lifetime. Such changes occur due to natural fouling, wear of sub-components or external effects induced by maintenance measures. To overcome this problem, we model machine-characteristic maps with artificial neural networks, which may be used as part of prediction models in a model predictive control unit. If an appropriate data set is available, this allows us to adapt the model to the current behavior of the machine without requiring in-depth knowledge about the underlying physics of this “concept drift”, as it is known in literature. However, the training of neural networks is usually connected with high computational effort while the task needs to be executed in real-time during operation. Furthermore, in real operating conditions, machine sensors can only provide labeled data from the current operating point of the machine, which can be stationary for long operation periods of up to several months. In general, this yields only an unrepresentative data subset of the machine-characteristics, which is not sufficient to retrain the whole model to a new state. To solve these problems, we firstly reduce the model adaptation to a convex optimization problem, which can be efficiently solved in real-time conditions. Secondly, we use a specialized data management system with which we can integrate historical data to supplement the unrepresentative data subset. In this paper we show the application of the outlined method on a compressor map and discuss the advantages and requirements of the method in the context of modeling applications for industrial turbomachinery. KW - compressors KW - Intelligent control KW - Neural networks KW - Modeling Y1 - 2023 SN - 978-0-7918-8697-7 U6 - https://doi.org/10.1115/GT2023-103458 VL - Volume 4 SP - 1 EP - 7 PB - ASME CY - Boston ER - TY - JOUR A1 - Mandal, Dipak Kumar A1 - Biswas, Nirmalendu A1 - Manna, Nirmal K A1 - Benim, Ali Cemal T1 - Impact of chimney divergence and sloped absorber on energy efficacy of a solar chimney power plant (SCPP) JF - Ain Shams Engineering Journal N2 - A numerical study is carried out meticulously to scrutinize the impact of different shapes of chimneys like circular (outer dia, dc), convergent (outer dia, 0.5dc), divergent (outer dia, 1.5dc), sudden contraction (outer dia, 0.5dc), and sudden expansion (outer dia, 1.5dc) on the performance of an SCPP. Furthermore, the parametric impact with different chimney divergence angles (CDA, ϕ), and ground absorber slope angle (GSA, γ) on the SCPP performance is also scrutinized. Optimum divergence angle (ϕ=+0.75◦) enhances the power generation up to ~ 47% (76 kW) with a horizontal ground absorber surface. An increase or decrease in CDA lessens the power generation. With a sloped ground absorber angle γ=0.6◦, the gain in power generation is 60% (82 kW). The study of combination of ground sloped absorber (γ=0.6◦) and divergent chimney (ϕ=+0.75◦) shows enhancement of the power generation upto 80% (92 kW) more than the classical Manzaranes plant. KW - Solar chimney power plant (SCPP) KW - Chimney divergence angle KW - Sloped absorber surface KW - Power generation KW - Efficiency KW - Regression analysis KW - DEAL KW - HSD Publikationsfonds KW - DFG Publikationskosten Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-42410 SN - 2090-4495 N1 - Datenverfügbarkeitserklärung: Daten, die die Ergebnisse dieser wissenschaftlichen Publikation stützen, sind auf begründete Anfrage bei dem*der korrespondierenden Autor*in erhältlich. PB - Elsevier ER - TY - GEN A1 - Deckert, Carsten A1 - Phan Ngoc, Duc Anh T1 - PlayStation 4 vs. Xbox One: Competitive Analysis of the Video Game Industry T3 - Business Cases in Industrial Engineering - 3 KW - Business Case KW - Strategy KW - Delta Model KW - Video Game Industry Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41142 CY - Düsseldorf ER - TY - GEN A1 - Deckert, Carsten T1 - Now What You Hear Is Not a Test: The Invention and Commercialization of Rap Music T3 - Business Cases in Industrial Engineering - 2 KW - Business Case KW - Musikindustrie KW - Entrepreneurship KW - Innovation Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41134 CY - Düsseldorf ER - TY - GEN A1 - Deckert, Carsten A1 - Lauermann, Paul T1 - Warum ist es am Rhein so schön? Strategische Ausrichtung des Binnenhafens Bonn T3 - Business Cases in Industrial Engineering - 1 KW - Business Case KW - Hafen KW - Strategie KW - Logistik Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41121 CY - Düsseldorf ER - TY - JOUR A1 - Failing, Luisa A1 - Kaluza, Stefan A1 - Strucks, Peter T1 - Catalytic CO2 methanation: Providing optimal test conditions for kinetic investigations JF - Chemie Ingenieur Technik N2 - In the context of using renewable energies and recycling climate-changing gases, methanation of CO2 provides one possibility. However, volatile availability of renewable energies for hydrogen production and fluctuating CO2streams from different sources lead to enhanced demand in investigating the influence of dynamic process operation on the catalyst performance, including detailed kinetic characterization. Reliable kinetic measurements require isothermal temperature control and absence of macrokinetic diffusion limitations. Both were investigated in this work while the determination of steady-state kinetic parameters is part of ongoing studies. Furthermore, a detailed analysis with respect to the long-term-stability of the nickel-based catalyst was performed KW - CO2 methanation KW - Kinetics KW - Long-term stability KW - Ni catalyst KW - Power-to-Gas Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40026 SN - 1522-2640 VL - 95 IS - 5 SP - 749 EP - 753 PB - Wiley ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Canal, Cansu Deniz A1 - Boke, Yakup Erhan T1 - Computational investigation of oxy-combustion of pulverized coal and biomass in a swirl burner JF - Energy Y1 - 2022 U6 - https://doi.org/10.1016/j.energy.2021.121852 SN - 0360-5442 VL - 238 IS - C PB - Elsevier ER - TY - JOUR A1 - Basaran, Anil A1 - Benim, Ali Cemal A1 - Yurddas, Ali T1 - Numerical Simulation of the Condensation Flow of the Isobutane (R600a) inside Microchannel JF - Heat Transfer Engineering Y1 - 2021 U6 - https://doi.org/10.1080/01457632.2021.1874668 SN - 0145-7632 VL - 43 IS - 3-5 SP - 337 EP - 361 PB - Taylor & Francis ER - TY - JOUR A1 - Bhattacharyya, Suvanjan A1 - Benim, Ali Cemal A1 - Chattopadhyay, Himadri A1 - Banerjee, Arnab T1 - Experimental investigation of heat transfer performance of corrugated tube with spring tape inserts JF - Experimental Heat Transfer Y1 - 2019 U6 - https://doi.org/10.1080/08916152.2018.1531955 SN - 0891-6152 VL - 32 IS - 5 SP - 411 EP - 425 PB - Taylor & Francis ER - TY - JOUR A1 - Grote-Ramm, Wolfgang A1 - Lanuschny, David A1 - Lorenzen, Finn A1 - Brito, Marcel Oliveira A1 - Schoenig, Felix T1 - Continual learning for neural regression networks to cope with concept drift in industrial processes using convex optimisation JF - Engineering Applications of Artificial Intelligence Y1 - 2022 U6 - https://doi.org/10.1016/j.engappai.2023.105927 SN - 0952-1976 VL - 120 PB - Elsevier ER - TY - JOUR A1 - Benim, Ali Cemal T1 - Introducing the “Mathematical Modelling and Numerical Simulation of Combustion and Fire” Section of the Journal Fire JF - fire Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40257 SN - 2571-6255 VL - 5 IS - 6 PB - MDPI ER - TY - JOUR A1 - Bhattacharyya, Suvanjan A1 - Benim, Ali Cemal A1 - Pathak, Manabendra A1 - Chamoli, Sunil A1 - Gupta, Ashutosh T1 - Thermohydraulic characteristics of inline and staggered angular cut baffle inserts in the turbulent flow regime JF - Journal of Thermal Analysis and Calorimetry Y1 - 2020 U6 - https://doi.org/10.1007/s10973-019-09094-8 SN - 1388-6150 VL - 140 IS - 3 SP - 1519 EP - 1536 PB - Springer Nature ER - TY - JOUR A1 - Laux, Christoph A1 - Gotter, Andreas A1 - Eckert, Frank A1 - Neef, Matthias T1 - Experimental results of a low-pressure steam Rankine cycle with a novel water lubricated radial inflow turbine for the waste heat utilization of internal combustion engines JF - Energy Conversion and Management Y1 - 2022 U6 - https://doi.org/10.1016/j.enconman.2022.116265 SN - 0196-8904 VL - 271 PB - Elsevier ER - TY - JOUR A1 - Niemann, Joerg A1 - Fussenecker, Claudia A1 - Schloesser, Martin A1 - Ocakci, Elif T1 - THE WORKERS PERSPECTIVE - EYE TRACKING IN PRODUCTION ENVIRONMENTS JF - ACTA TECHNICA NAPOCENSIS SERIES-APPLIED MATHEMATICS MECHANICS AND ENGINEERING Y1 - 2021 SN - 1221-5872 VL - 64 IS - 1 SP - 7 EP - 14 PB - Technical University of Cluj-Napoca ER - TY - JOUR A1 - Biedermann, Till M. A1 - Czeckay, Pasquale A1 - Hintzen, Nils A1 - Kameier, Frank A1 - Paschereit, C. O. T1 - Applicability of Aeroacoustic Scaling Laws of Leading Edge Serrations for Rotating Applications JF - acoustics KW - DOAJ KW - ISAVE Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40311 SN - 2624-599X VL - 2 IS - 3 SP - 579 EP - 594 PB - MDPI ER - TY - JOUR A1 - Pfeiffelmann, Bjorn A1 - Ozman, Cansu A1 - Benim, Ali Cemal A1 - Joos, Franz T1 - Analysis of the effect of nonuniform surface temperature distribution on the performance of a thermoelectric generator JF - Sustainable Energy Technologies and Assessments Y1 - 2022 U6 - https://doi.org/10.1016/j.seta.2022.102375 SN - 2213-1388 VL - 53 IS - A PB - Elsevier ER - TY - JOUR A1 - Biswas, Nirmalendu A1 - Mandal, Dipak Kumar A1 - Manna, Nirmal K. A1 - Benim, Ali Cemal T1 - Enhanced energy and mass transport dynamics in a thermo-magneto-bioconvective porous system containing oxytactic bacteria and nanoparticles: cleaner energy application JF - Energy Y1 - 2023 U6 - https://doi.org/10.1016/j.energy.2022.125775 SN - 0360-5442 VL - 263 IS - B PB - Elsevier ER - TY - JOUR A1 - Mabrouk, Riheb A1 - Naji, Hassane A1 - Benim, Ali Cemal A1 - Dhahri, Hacen T1 - A State of the Art Review on Sensible and Latent Heat Thermal Energy Storage Processes in Porous Media: Mesoscopic Simulation JF - Applied Sciences KW - DOAJ Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40343 VL - 12 IS - 14 PB - MDPI ER - TY - JOUR A1 - Bhattacharyya, Suvanjan A1 - Chattopadhyay, Himadri A1 - Benim, Ali Cemal T1 - Computational investigation of heat transfer enhancement by alternating inclined ribs in tubular heat exchanger JF - Progress in Computational Fluid Dynamics KW - CFD KW - forced convection KW - transitional turbulence KW - inclined ribs KW - heat transfer enhancement Y1 - 2017 U6 - https://doi.org/10.1504/PCFD.2017.088818 SN - 1468-4349 VL - 17 IS - 6 SP - 390 EP - 396 PB - Inderscience Enterprises Limited ER - TY - JOUR A1 - Mabrouk, Riheb A1 - Benim, Ali Cemal A1 - Naji, Hassane A1 - Dhahri, Hacen T1 - Investigation of Pulsed Flow Effects on the Phase Change Within an Open-Cell Metal Foam Using Thermal Lattice Boltzmann Method JF - Transport in Porous Media KW - Thermal lattice Boltzmann method KW - Energetic and exergetic efficiencies KW - Local thermal non-equilibrium KW - Solidification process KW - Melting KW - Porous media KW - Pulsating flow Y1 - 2023 U6 - https://doi.org/10.1007/s11242-023-01903-x SN - 0169-3913 VL - 147 IS - 2 SP - 225 EP - 257 PB - Springer Nature ER - TY - JOUR A1 - Farooq, Asma A1 - Ali, Ramzan A1 - Benim, Ali Cemal T1 - Soret and Dufour effects on three dimensional Oldroyd-B fluid JF - Physica A: Statistical Mechanics and its Applications Y1 - 2018 U6 - https://doi.org/10.1016/j.physa.2018.02.204 SN - 0378-4371 VL - 503 SP - 345 EP - 354 PB - Elsevier ER - TY - JOUR A1 - Queval, Loic A1 - Coty, Alain A1 - Vido, Lionel A1 - Gottkehaskamp, Raimund A1 - Multon, Bernard T1 - A Switched Reluctance Motor Drive Using Photovoltaic Transistors: Principle, Prototype, Experimental, and Numerical Results JF - IEEE Transactions on Industry Applications Y1 - 2017 U6 - https://doi.org/10.1109/TIA.2017.2718493 SN - 0093-9994 VL - 53 IS - 5 SP - 4886 EP - 4893 PB - IEEE ER - TY - JOUR A1 - Ali, R. A1 - Farooq, A. A1 - Shahzad, A. A1 - Benim, Ali Cemal A1 - Iqbal, A. A1 - Razzaq, M. T1 - Computational approach on three-dimensional flow of couple-stress fluid with convective boundary conditions JF - Physica A: Statistical Mechanics and its Applications Y1 - 2022 U6 - https://doi.org/10.1016/j.physa.2019.124056 SN - 0378-4371 VL - 553 PB - Elsevier ER -