Campusleben_HAW_Hamburg_13

Lehrende_HAW_Hamburg_8

Studierende_HAW_Hamburg_13

Informationen für:

Publikationen von Professorinnen und Professoren der HAW Hamburg

Jahr:  
Alle : 0, ... , 2016, 2017, 2018, ... , 2020
Autor:  
Alle : A, À, B, C, D, E, F, G, H, I, J, K, L, M, N, O, Ö, P, Q, R, S, T, U, V, W, Y, Z 
Alle : Saalberg, ... , Seeckt, Seedorf, sEEGER, ... , Sörensen 
Präferenzen: 
Referenzen pro Seite: Zeige Schlüsselwörter Zeige Zusammenfassung
Referenzen

Zeitschriftenbeiträge:

default
Bernd Baumann, Jörg Schwieger, Ulrich Stein, Sarah Hallerberg und Marcus Wolff
High-intensity discharge lamp and Duffing oscillator--Similarities and differences
Journal of Applied Physics, 122(21):16
6 Dezember 2017
E

Marker: TI-MP

Zusammenfassung: The processes inside the arc tube of high-intensity discharge lamps are investigated by finite element simulations. The behavior of the gas mixture inside the arc tube is governed by differential equations describing mass, energy and charge conservation as well as the Helmholtz equation for the acoustic pressure and the Reynolds equations for the flow driven by buoyancy and Reynolds stresses. The model is highly nonlinear and requires a recursion procedure to account for the impact of acoustic streaming on the temperature and other fields. The investigations reveal the presence of a hysteresis and the corresponding jump phenomenon, quite similar to a Duffing oscillator. The similarities and, in particular, the differences of the nonlinear behavior of the high-intensity discharge lamp to that of a Duffing oscillator are discussed. For large amplitudes the high-intensity discharge lamp exhibits a stiffening effect in contrast to the Duffing oscillator. It is speculated on how the stiffening might affect hysteresis suppression.

default
Vera Schorbach, Peter Dalhoff und Peter Gust
Teeter design for lowest extreme loads during end impacts
Wind Energy,
19 September 2017
ISSN: 1099-1824

Marker: TI-MP

pdf
Mike Gerdes, Diego Galar und Dieter Scholz
Genetic Algorithms and Decision Trees for Condition Monitoring and Prognosis of A320 Aircraft Air Conditioning
Insight - Non-Destructive Testing and Condition Monitoring, 59(8):424 - 433
August 2017
ISSN: 1354-2575

Marker: TI-FF

Zusammenfassung: Unscheduled maintenance is a large cost driver for airlines, but condition monitoring and prognosis can reduce the number of unscheduled maintenance actions. The paper shows condition monitoring can be introduced into most system by adopting a data-driven approach and using existing data sources. The goal is to forecast the remaining useful life (RUL) of a system based on various sensor inputs. We use decision trees to learn the characteristics of a system. The data for the decision tree training and classification are processed by a generic parametric signal analysis. To obtain the best classification results for the decision tree, the parameters are optimized by a genetic algorithm. A forest of three different decision trees with different signal analysis parameters is used as classifier. The proposed method is validated with data from an A320 aircraft from ETIHAD Airways. Validation shows condition monitoring can classify the sample data into ten predetermined categories, representing the total useful life (TUL) in 10 percent steps. This is used to predict the RUL. There are 350 false classifications out of 850 samples. Noise reduction reduces the outliers to nearly zero, making it possible to correctly predict condition. It is also possible to use the classification output to detect a maintenance action in the validation data.

default
Jan Stellamanns, Dana Ruetters, Keshav Dahal und Zita Schillmoeller
Visualizing risks in cancer communication: A systematic review of computer-supported visual aids
Patient Education and Counseling, 100(8):1421 - 1431
August 2017
englisch

Schlüsselwörter: Visual aids, Visualization, Risk communication, Internet, Medical decision-making, Neoplasms, Cancer

Marker: LS-GW

default
Bernd Baumann, Jörg Schwieger, Ulrich Stein, Sarah Hallerberg und Marcus Wolff
High-Intensity Discharge Lamp and Duffing Oscillator - Similarities and Differences
arXiv,
8 Mai 2017

Marker: TI-MP

Zusammenfassung: The processes inside the arc tube of high-intensity discharge lamps are inves- tigated by finite element simulations. The behavior of the gas mixture inside the arc tube is governed by differential equations describing mass, energy and charge conservation as well as the Helmholtz equation for the acoustic pressure and the Navier-Stokes equation for the flow driven by the buoyancy and the acous- tic streaming force. The model is highly nonlinear and requires a recursion proce- dure to account for the impact of acoustic streaming on the temperature and other fields. The investigations reveal the presence of a hysteresis and the correspond- ing jump phenomenon, quite similar to a Duffing oscillator. The similarities and, in particular, the differences of the nonlinear behavior of the high-intensity dis- charge lamp to that of a Duffing oscillator are discussed. For large amplitudes the high-intensity discharge lamp exhibits a stiffening effect in contrast to the Duffing oscillator.

default
Simon Ressel, Armin Laube, Simon Fischer, Antonio Chica Lara, Thomas Flower und Thorsten Struckmann
Performance of a vanadium redox flow battery with tubular cell design
Journal of Power Sources, 355:199-205
19 April 2017

Marker: TI-MuP

default
Jürgen Lorenz, M. Hauck, S. Schröder und G. Meyer-Hamme
Acupuncture analgesia involves modulation of pain-induced gamma oscillations and cortical network connectivity
Scientific reports 7,
2017

Marker: LS

pdf
Ellen Pflaum und Dieter Scholz
Aircraft Design (Flugzeugentwurf)
Synergie - Fachmagazin für Digitalisierung in der Lehre, Sonderband: HOOU Content Projekte 2015/16:238-241
2017
ISSN: 2509-3088

Schlüsselwörter: Flugzeug, Entwurf, Flugzeugentwurf, Auslegung, Sizing, Aircraft, Design, FF-HOOU

Marker: TI-FF

Zusammenfassung: Ausgehend von den Anforderungen werden Schritt für Schritt die Parameter des Flugzeuges ermittelt, z. B. Schub, Flügelfläche, Nutzlast, benötigte Kraftstoffmasse, Leermasse, Start- und Landemasse und später dann Kabine, Rumpf, Flügel und Leitwerke.

default
Dirk Lewandowski, Friederike Kerkmann, S. Rümmele und S. Sünkler
An Empirical Investigation on Search Engine Ad Disclosure
Journal of the American Society for Information Science and Technology, 69 (3), :420-437
2017

Marker: DMI-I

default
Ernst Sanders, Björn Beckmann, Dorothea Hohmann, Moritz Eickmeyer, Sarah Bolz, Corinna Brodhagen und Petra Derr
An improved high cell density cultivation - iHCDC - strategy for leucine auxotrophic Escherichia coli
K12 ER2507. Eng. Life Sci. 17, :857–864
2017

Marker: LS-Bt

Seite:  
Zurück | 1, 2, 3, 4, 5, 6, ... , 12 | Weiter
Total:
2145
Export als:
BibTeX, XML

Letzte Änderung: 23.01.15

An die Redaktion