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Parameterstudie zur Simulation von Niedertemperatur-Kreisprozessen (2011)

Vetter, Christian

Karlsruhe : KIT Scientific Publishing

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Keywords: Forschungsbericht ; Geothermische Energie ; Elektrizitätserzeugung ; ORC-Anlage ; Kreisprozess

Type of Medium: Online Resource

Pages: Online-Ressource

ISBN: 9783866446731

Series Statement: KIT scientific reports 7585

URL: https://digbib.bibliothek.kit.edu/volltexte/1000022797

URL: https://edocs.tib.eu/files/e01fn12/661987329.pdf

URL: https://nbn-resolving.org/urn:nbn:de:0072-227979

URL: http://d-nb.info/1185581391/34

URL: https://doi.org/10.5445/KSP/1000022797

URN: urn:nbn:de:0072-227979

DOI: 10.5445/KSP/1000022797

DDC: 530.092

Language: German

Note: Systemvoraussetzungen: Acrobat reader.

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Solving or resolving global tomographic models with spherical wavelets, and the scale and sparsity of seismic heterogeneity (2011)

Frederik J. Simons; Ignace Loris; Guust Nolet; Ingrid C. Daubechies; S. Voronin; J. S. Judd; P. A. Vetter; J. Charléty; C. Vonesch

Oxford University Press

In: Geophysical Journal International

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Publication Date: 2011-09-29

Description: SUMMARY We propose a class of spherical wavelet bases for the analysis of geophysical models and for the tomographic inversion of global seismic data. Its multiresolution character allows for modelling with an effective spatial resolution that varies with position within the Earth. Our procedure is numerically efficient and can be implemented with parallel computing. We discuss two possible types of discrete wavelet transforms in the angular dimension of the cubed sphere. We describe benefits and drawbacks of these constructions and apply them to analyse the information in two published seismic wave speed models of the mantle, using the statistics of wavelet coefficients across scales. The localization and sparsity properties of wavelet bases allow finding a sparse solution to inverse problems by iterative minimization of a combination of the ℓ 2 norm of the data residuals and the ℓ 1 norm of the model wavelet coefficients. By validation with realistic synthetic experiments we illustrate the likely gains from our new approach in future inversions of finite-frequency seismic data.

Print ISSN: 0956-540X

Electronic ISSN: 1365-246X

Topics: Geosciences

Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).

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