Computational Modelling Group

Dr Yujiang Xie

Position
Research Fellow
Institution
Ocean & Earth Science (FNES)
Webpage
https://sites.google.com/site/yujiangxie
Telephone
(023) 8059 9239
E-mail
yujiang.xie@soton.ac.uk
Contact
Complete this online contact form to contact Yujiang.

Dr Yujiang Xie is a Research Fellow in Computational Seismology within Ocean and Earth Science, National Oceanography Centre Southampton (NOCS) at the University of Southampton, UK.

Current advisors: Prof. Catherine A. Rychert (University of Southampton, UK; Woods Hole Oceanographic Institution, USA), Prof. Nicholas Harmon (University of Southampton, UK; Woods Hole Oceanographic Institution, USA).

Current collaborators: Prof. Qinya Liu (University of Toronto, Canada), Prof. Dr. Dirk Gajewski (University of Hamburg, Germany), Prof. Mike Kendall (University of Oxford, UK), and many others.

Education

12/2017: PhD, Earth System Sciences, University of Hamburg, Germany. Advisor: Prof. Dr. Dirk Gajewski

07/2013: Master, Geological Engineering, Lanzhou University, China

07/2010: Bachelor, Geological Engineering, China University of Mining and Technology, Beijing

Research interests: My research interests focus on developing techniques to image the dynamic structure of the Earth's interior, ranging from the Earth’s surface down to the mantle. These techniques aim hopefully to address a range of societally relevant problems, including mantle dynamics, plate tectonics, seismic hazards, and climate change. Previously, I have worked on wave propagation, full waveform modeling and inversion, or more generally numerical methods for PDEs, inverse theory, and optimization algorithms. Currently, my work involves incorporating recent advancements in machine learning methods. I prioritize the principle of reproducible research and actively develop open-source software packages for the geophysics and seismology communities.

Selected presentations and talks:

03/2023: Quad spectral-element method and second-order adjoint state method (QuadSEM), with Prof.Dr.Barbara Wohlmuth and her group, Technical University of Munich, Germany.

09/2022: Quad spectral-element method and second-order adjoint state method (QuadSEM), with Dr. David A. Ham and Prof. Paul Kelly (Imperial College London, UK), and Prof. Patrick Farrell (University of Oxford, UK).

07/2022: Spectral element and adjoint methods with full Hessian kernels, radial and azimuthal anisotropy, with Prof. Barbara Romanowicz, University of California, Berkeley, USA.

05/2020: Bayesian inference and machine-learning methods to seismic data analysis, with Prof. Mike Hobson and Prof. Nicholas Rawlinson, University of Cambridge, UK.

02/2020: Computation of full Hessian kernels by spectral-element and adjoint methods, with Prof. Catherine Rychert and Prof. Nicholas Harmon, University of Southampton, UK.

06/2019: Open-source packages for full-waveform modeling and inversion, with Prof. Catherine Rychert and Prof. Nicholas Harmon, University of Southampton, UK.

04/2019: 3-D full-waveform modeling for the PI-LAB experiment, with Prof. Catherine Rychert and Prof. Nicholas Harmon, University of Southampton, UK.

09/2018: 3-D full-waveform inversion with global optimization (GPU), with Prof. Mrinal Sen, Jackson School of Geosciences, University of Texas at Austin, USA.

Selected peer-reviewed publications:

  1. Yujiang Xie, Catherine Rychert, Nicholas Harmon, 2023. Elastic and anelastic adjoint tomography with Fréchet and full Hessian kernels. Geophysical Journal International, 234, 1205–1235. dot:10.1093/gji/ggad114

  2. Peng Yang, Dirk Gagewski and Yujiang Xie, 2023. Gaussian-weighted cross-correlation imaging condition for microseismic source localization, Geophysics. 88, 1-96, https://doi.org/10.1190/geo2022-0455.1

  3. Nicholas Harmon, Catherine Rychert, Yujiang Xie and Bogiatzis Petros, 2022. Analytic P-to-S and S-to-P scattered wave sensitivity kernels, Geochemistry, Geophysics, Geosystems, 23, e2021GC010290. doi: https://doi.org/10.1029/2021GC010290

  4. Bogiatzis Petros, Catherine Rychert, Nicholas Harmon and Yujiang Xie, 2022. Fast calculation of spatial sensitivity kernels for converted waves in arbitrary heterogeneous media using graph theory, Geophysical Journal International, 230, 654-672. doi: https://doi.org/10.1093/gji/ggac078

  5. Yujiang Xie, Catherine Rychert, Nicholas Harmon, Qinya Liu and Dirk Gajewski, 2021. On-the-fly Full Hessian Kernel Calculations Based upon Seismic Wave Simulations, Seismological Research Letters, 92(6): 3832–3844. doi: https://doi.org/10.1785/0220200410

  6. Lei Li, Jingquan Tan, Dazhou Zhang, Ajay Malkoti, Ivan Abakumov and Yujiang Xie, 2021. FDwave3D: A MATLAB solver for the 3D anisotropic wave equation using the finite-difference method, Computational Geosciences, 25, 1565–1578. doi: https://doi.org/10.1007/s10596-021-10060-3

  7. Yujiang Xie and Dirk Gajewski, 2019. Reliability of data-driven wavefront attributes in laterally heterogeneous media, Geophysics, 84(3), O49-O62. doi: https://doi.org/10.1190/geo2018-0382.1

  8. Lei Li, Jingquan Tan, Yujiang Xie, Yuyang Tan, Jan Walda, Zhengguang Zhao and Dirk Gajewski, 2019. Waveform-based microseismic location using stochastic optimization algorithms: A parameter tuning workflow, Computers & Geosciences, 124, 115-127. doi: https://doi.org/10.1016/j.cageo.2019.01.002

  9. Yujiang Xie and Dirk Gajewski, 2018. 3-D wavefront attribute determination and conflicting dip processing, Geophysics, 83(6), V325-V343. doi: https://doi.org/10.1190/geo2017-0792.1

  10. Yujiang Xie and Dirk Gajewski, 2017. 5-D interpolation with wavefront attributes, Geophysical Journal International, 211(2), 897-919. doi: https://doi.org/10.1093/gji/ggx334

  11. Yujiang Xie and Gao Liu, 2015. Resolution enhancement of non-stationary seismic data using amplitude-frequency partition, Geophysical Journal International, 200, 773-778. doi: https://doi.org/10.1093/gji/ggu401

  12. Yujiang Xie and Gao Liu, 2014. Predicting the distribution of reservoirs by combining variable wavelet model of seismograms with wavelet edge analysis and modeling, Journal of Applied Geophysics, 101, 116-123. doi: https://doi.org/10.1016/j.jappgeo.2013.12.005

Selected international conference abstracts:

  1. Yujiang Xie, Catherine Rychert, Nicholas Harmon, Petros Bogiatzis and Michael Kendall. Full-waveform Inversion at the Mid-Atlantic Ridge based on PI-LAB experiment: model resolution and inter-parameter trade-off analyses, AGU Fall Meeting 2021.

  2. Yujiang Xie, Catherine Rychert, Nicholas Harmon and Qinya Liu. QuadSEM-Hdm: a hybrid toolkit for FWI model-resolution assessment and inter-parameter trade-off analysis via full Hessian kernels, AGU Fall Meeting 2021.

  3. Qinya Liu, Tianshi Liu, Bin He, Kai Wang, Yingjie Yang, Yujiang Xie, Catherine Rychert, Nicholas Harmon. Cube2sph: a toolkit enabling accurate and efficient continental-scale seismic wave simulation using SPECFEM3D, AGU Fall Meeting 2021.

  4. Yujiang Xie, Catherine Rychert, Nicholas Harmon, Petros Bogiatzis, Qinya Liu and Michael Kendall. Full-waveform Inversion at the Mid-Atlantic Ridge (MAR) based on PI-LAB experiment, Pacific Workshop 2021.

  5. Yujiang Xie, Catherine Rychert, Nicholas Harmon, Petros Bogiatzis, Qinya Liu and Michael Kendall, Full-waveform Inversion at the Mid-Ocean Ridge based on PI-LAB experiment, AGU Fall Meeting 2020.

  6. Qinya Liu, Tianshi Liu, Bin He, Kai Wang, Yingjie Yang, Yujiang Xie, Catherine Rychert and Nicholas Harmon. Implementation of perfectly matched layer (PML) boundary condition for curvilinear grids in the SPECFEM3D package, AGU Fall Meeting 2020.

  7. Yujiang Xie, Lei Li, Catherine Rychert, Nicholas Harmon, Petros Bogiatzis and Daniel Peter. Computation of Hessian vector product by spectral-element and adjoint methods using wavefield storage scheme, AGU Fall Meeting 2020.

  8. Yujiang Xie, Catherine Rychert, Nicholas Harmon and Michael Kendall. 3D Full-Waveform Modeling at the Equatorial Mid-Atlantic Ridge from PI-LAB Experiment, AGU Fall Meeting 2019, San Francisco, USA, 2019.

  9. Yujiang Xie, Catherine Rychert, Nicholas Harmon, Qinya Liu and J Michael Kendall. SPECFEM3D: An Improvement of the Internal Mesher for Full-Waveform Modeling with 3D Elastic Parameters, Acoustic/Elastic Propagation, and Bathymetry/Topography, AGU Fall Meeting 2019, San Francisco, USA, 2019.

  10. Yujiang Xie, Yan Yang and Lei Li. 3D wavefront tomography, Part I: NIP wavefront tomography, SEG Technical Program Expanded Abstracts 2018, Anaheim, USA, 2018.

Working with...

Nicholas Harmon
None, None