## Annual Report, 2012

## Slides sets from review meeting, 19 Apr 13

Room 1049, Duncan Hall, Rice University.

- 0830-0900: Coffee, meet
- 0900-0945: Project overview, William W. Symes
- 0945-1015: Linearized extended waveform inversion and inversion velocity analysis, Yujin Liu
- 1015-1035: Linearized extended waveform inversion: reduced objective function and its gradient, Yin Huang
- 1035-1050: Break
- 1050-1120: Subsurface imaging through low-frequency nonlinear full waveform inversion, Papia Nandi
- 1120-1140: Using time-skewing approach to accelerate stencil codes for constant density acoustic wave equation, Muhong Zhou
- 1140-1200: Discontinuous Galerkin and finite difference methods for the acoustic wave equations with smooth coefficients, Mario Bencomo
- 1200-1315: Lunch, DH 3092
- 1315-1400: Subsurface domain image warping by horizontal contraction and its application to wave-equation migration velocity analysis, Peng Shen (Shell)
- 1400-1410: Depth-oriented extended Born modeling operator and its adjoint, Lei. Fu
- 1410-1430: An approximate inverse to Born modeling operator, Jie Hou
- 1430-1450: Break
- 1450-1510: Multisource least-squares extended reverse time migration with preconditioned guided gradient method, Yujin Liu
- 1510-1530: Implementation of PML in the depth-oriented extended forward modeling, Lei Fu
- 1530-1550: Sparse Radon transform with dual gradient ascent algorithm, Yujin. Liu
- 1550-... : Discussion, adjourn, further informal discusssion at Valhalla

## Expanded Abstracts SEG 2012:

- Waveform inversion via nonlinear differential semblance optimization, D. Sun and W. W. Symes, SI 3
- Harmonic coordinate finite element method for acoustic waves, X. Wang and W. W. Symes, SM 3 (slide set)

## Expanded Abstracts SEG 2013 (submitted):

- Subsurface domain image warping by horizontal contraction and its application to wave-equation migration velocity analysis, P. Shen and W. W. Symes
- Inversion velocity analysis via differential semblance optimization in the depth oriented extension, Y. Liu, W. W. Symes, Y. Huang, and Z. Li
- Multisource least-squares extended reverse time migration with preconditioned guided gradient method, Y. Liu, W. W. Symes, and Z. Li
- Sparse Radon transform with dual gradient ascent algorithm, Y. Liu, Z. Peng, W. W. Symes, and W. Yin

## Theses and Reports:

- PhD Thesis: Xin Wang, Transfer-of-approximation Approaches for Subgrid Modeling
- PhD Thesis: Dong Sun, A Nonlinear Differential Semblance Algorithm for Waveform Inversion

## Papers in refereed journals (appeared, accepted, submitted)

- K. Blazek, C. Stolk and W. W. Symes, A Mathematical Framework for Inverse Wave Problems in Heterogeneous Media,
**Inverse Problems**, in press (2/13)