Author

Shijun Cheng

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Preprint Sep 2026

Shallow-to-deep velocity model building via diffusion models-Part II: Realistic scenarios

Full-waveform inversion (FWI) requires accurate initial velocity models to avoid cycle-skipping, but constructing such models remains challenging in practice. Building on the depth-progressive diffusion framework introduced in Part~I, which relied on idealized reflectivity constraints, this work adapts the methodology...

Shi-Jun Cheng, R. Harsuko, T. Alkhalifah · 0 citations

Jul 2026

Generative wave propagator

A conditional diffusion-based wavefield propagator that advances seismic wavefields recursively from one time step to the next, conditioned by a short history of recent wavefield time steps, the velocity model, and the wavefield time step index is introduced.

Shi-Jun Cheng, T. Alkhalifah · arXiv.org · 0 citations