Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Matthias Wächter"'
Publikováno v:
PRX Energy, Vol 2, Iss 3, p 033009 (2023)
The power conversion process of a wind turbine can be characterized by a stochastic differential equation (SDE) of the power output conditioned to certain fixed wind speeds. An analogous approach can also be applied to the mechanical loads on a wind
Externí odkaz:
https://doaj.org/article/80c93dc8ef3b42d085c9f95515ed5fa0
Autor:
Nathalie Möckli, Michael Simon, Carla Meyer-Massetti, Sandrine Pihet, Roland Fischer, Matthias Wächter, Christine Serdaly, Franziska Zúñiga
Publikováno v:
BMC Health Services Research, Vol 21, Iss 1, Pp 1-14 (2021)
Abstract Introduction The persistent fragmentation of home healthcare reflects inadequate coordination between care providers. Still, while factors at the system (e.g., regulations) and organisational (e.g., work environment) levels crucially influen
Externí odkaz:
https://doaj.org/article/4f64b1224cc8481bbe895cebece34ac8
Publikováno v:
Energies, Vol 8, Iss 2, Pp 895-920 (2015)
We apply a modified proper orthogonal decomposition (POD) to large eddy simulation data of a wind turbine wake in a turbulent atmospheric boundary layer. The turbine is modeled as an actuator disk. Our analysis mainly focuses on the pragmatic identif
Externí odkaz:
https://doaj.org/article/69d7dfeaab8247b095505a215dd87290
Publikováno v:
Energies, Vol 7, Iss 12, Pp 8279-8293 (2014)
We propose a procedure to estimate the fatigue loads on wind turbines, based on a recent framework used for reconstructing data series of stochastic properties measured at wind turbines. Through a standard fatigue analysis, we show that it is possibl
Externí odkaz:
https://doaj.org/article/df2a9bb1581f4a55840408f80f537f44
Autor:
Benjamin Wahl, Ulrike Feudel, Jaroslav Hlinka, Matthias Wächter, Joachim Peinke, Jan A. Freund
Publikováno v:
Entropy, Vol 21, Iss 10, p 1010 (2019)
In a coupled system, predictive information flows from the causing to the caused variable. The amount of transferred predictive information can be quantified through the use of transfer entropy or, for Gaussian variables, equivalently via Granger cau
Externí odkaz:
https://doaj.org/article/140ab6b785db4cbb805bf586c07d2a7d
Publikováno v:
Journal of Open Research Software, Vol 4, Iss 1, Pp e34-e34 (2016)
We describe an 'R' package developed by the research group 'Turbulence, Wind energy' 'and Stochastics' (TWiSt) at the Carl von Ossietzky University of Oldenburg, which extracts the (stochastic) evolution equation underlying a set of data or measureme
Externí odkaz:
https://doaj.org/article/fd8eff4718ef456fbde2a9a7fa79984e
Publikováno v:
Energies, Vol 11, Iss 3, p 612 (2018)
In this work, large eddy simulation data is analysed to investigate a new stochastic modeling approach for the wake of a wind turbine. The data is generated by the large eddy simulation (LES) model PALM combined with an actuator disk with rotation re
Externí odkaz:
https://doaj.org/article/0807f77d54c445dd9ce1350f9953138b
Autor:
Matthias Wächter, A. Kühn Rettenmeier
Publikováno v:
Meteorologische Zeitschrift, Vol 18, Iss 3, Pp 277-280 (2009)
Wind velocity measurements were taken using a Leosphere Windcube LIDAR system, which operates as a pulsed laser Doppler anemometer. Here we report on first results, which show typical characteristics of atmospheric wind velocities. Especially pronoun
Externí odkaz:
https://doaj.org/article/d8ff56c013a2458ea24d93ee5c21878d
Publikováno v:
Energies, Vol 10, Iss 12, p 1944 (2017)
To monitor wind turbine vibrations, normal behaviour models are built to predict tower top accelerations and drive-train vibrations. Signal deviations from model prediction are labelled as anomalies and are further investigated. In this paper we asse
Externí odkaz:
https://doaj.org/article/ba5d1fea3a4c4daf8daf15b35a314399
Publikováno v:
New Journal of Physics, Vol 18, Iss 1, p 013017 (2016)
As an example of a complex system with extreme events, we investigate ocean wave states exhibiting rogue waves. We present a statistical method of data analysis based on multi-point statistics which for the first time allows the grasping of extreme r
Externí odkaz:
https://doaj.org/article/bb8ea0c756734ec1a0c30641713963db