• Login
    View Item 
    •   Home
    • Research
    • Articles
    • View Item
    •   Home
    • Research
    • Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of KAUSTCommunitiesIssue DateSubmit DateThis CollectionIssue DateSubmit Date

    My Account

    Login

    Quick Links

    Open Access PolicyORCID LibguideTheses and Dissertations LibguideSubmit an Item

    Statistics

    Display statistics

    Square-Root Variable Metric based nullspace shuttle: a characterization of the non-uniqueness in elastic full-waveform inversion

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Liu_et_al-2020-Journal_of_Geophysical_Research__Solid_Earth.pdf
    Size:
    6.904Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Download
    Type
    Article
    Authors
    Liu, Qiancheng cc
    Peter, Daniel cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Earth Science and Engineering Program
    Extreme Computing Research Center
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    UAPN#2605-CRG4
    Date
    2020-02-18
    Online Publication Date
    2020-02-18
    Print Publication Date
    2020-02
    Embargo End Date
    2020-07-29
    Submitted Date
    2019-09-09
    Permanent link to this record
    http://hdl.handle.net/10754/661344
    
    Metadata
    Show full item record
    Abstract
    Full-waveform inversion (FWI) is for most geophysical applications an ill-posed inverse prob-16lem, with non-unique solutions. We examine its non-uniqueness by exploring the nullspace17shuttle, which can efficiently generate an ensemble of data-fitting solutions. We construct18this shuttle based on a quasi-Newton method, the square-root variable-metric (SRVM)19method. The latter provides access to the inverse data-misfit Hessian in FWI for large-scale20applications. Combining the SRVM method with a randomised singular value decomposi-21tion, we obtain the eigenvector subspaces of the inverse data-misfit Hessian. Its primary22eigenvalue and eigenvector are considered to determine the null space of inversion result.23Using the SRVM-based nullspace shuttle, we can modify the inverted result a posteriori24in a highly efficient manner without corrupting the data misfit. Also, because the SRVM25method is embedded through elastic FWI, our method can be extended to multi-parameter26problems. We confirm and highlight our approach with the elastic Marmousi example.
    Citation
    Liu, Q., & Peter, D. (2020). Square-Root Variable Metric based nullspace shuttle: a characterization of the non-uniqueness in elastic full-waveform inversion. Journal of Geophysical Research: Solid Earth. doi:10.1029/2019jb018687
    Sponsors
    All data analyzed here are openly available. The MarmousiSRVM model can be found at https://zenodo.org/badge/latestdoi/125932696. The SeisflowSRVM codes can be found at https://zenodo.org/badge/latestdoi/125918416. The codes for null-space shuttle can be found at https://zenodo.org/badge/latestdoi/126001419. This work was supported by the King Abdullah University of Science & Technology (KAUST) Office of Sponsored Research (OSR) under award No. UAPN#2605-CRG4. Computational resources were provided by the Information Technology Division and Extreme Computing Research Center (ECRC) at KAUST.
    Publisher
    American Geophysical Union (AGU)
    Journal
    Journal of Geophysical Research: Solid Earth
    DOI
    10.1029/2019jb018687
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1029/2019JB018687
    ae974a485f413a2113503eed53cd6c53
    10.1029/2019jb018687
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Extreme Computing Research Center; Earth Science and Engineering Program; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

    entitlement

     
    DSpace software copyright © 2002-2023  DuraSpace
    Quick Guide | Contact Us | KAUST University Library
    Open Repository is a service hosted by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items. For anonymous users the allowed maximum amount is 50 search results.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.