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000874425 037__ $$aFZJ-2020-01435
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000874425 1001_ $$0P:(DE-HGF)0$$aBohlen, Thomas$$b0$$eCorresponding author
000874425 1112_ $$aNIC Symposium 2020$$cJülich$$d2020-02-27 - 2020-02-28$$wGermany
000874425 245__ $$aApplications of Seismic Full-Waveform Inversion on Shallow-Seismic and Ultrasonic Data
000874425 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2020
000874425 29510 $$aNIC Symposium 2020
000874425 300__ $$a321 - 329
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000874425 4900_ $$aPublication Series of the John von Neumann Institute for Computing (NIC) NIC Series$$v50
000874425 520__ $$aConventional seismic imaging methods utilise a small portion of the information in the seismic data we obtain. Most methods analyse their arrival times or specific signal amplitudes only. In this report we further develop and apply a new seismic inversion and imaging technique that uses the full information content of the seismic recordings. Full waveform inversion (FWI) is an algorithm that accounts for the full seismic waveform. It iteratively retrieves multiparameter physical models of the material by numerically solving the wave equation and optimisation problem. FWI is currently a cutting-edge seismic inversion and imaging technique that enables to exploit the full information contained in the seismic waveforms over a broad range of frequencies and apertures for an improved estimation of physical parameters. It allows for a mapping of structures on spatial scales down to approximately half of the seismic wavelength, hence providing a tremendous improvement of resolution compared to travel-time tomography based on ray-theory. We especially focus on the applications of FWI on two different scales, including near-surface scale which extends from Earth’s free surface to a depth around 10 meters and laboratory scale which targets on material from a few millimetre to less than one meter. Numerical tests and real-world applications are used to show the high resolution of FWI in reconstructing physical properties of the earth model and artificial material.
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000874425 7001_ $$0P:(DE-HGF)0$$aPan, Yudi$$b1
000874425 7001_ $$0P:(DE-HGF)0$$aMüller, Jonas$$b2
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