2D seismic migration with compensation: a preliminary study
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Propagation of seismic waves in real media is in many respects different from propagation in an ideal solid. Presented here is a method for accommodating absorption and dispersion effects in a migration scheme, in which extrapolation operators that compensate for absorption and dispersion are designed. The algorithm is developed in the frequency–wavenumber domain, and is characterized by simplicity, speed, less dependence on stratum obliquity, and good stabilization. To demonstrate absorption and dispersion in the viscoacoustic medium, we first perform forward modelling, which shows that the amplitude of the wave is decreased, frequency is lower and the phase is influenced when a wave propagates in the viscoacoustic medium. We then perform viscoacoustic and elastic 2D pre-stack depth migrations on the synthetic data. Without consideration of the absorption and dispersion in the elastic pre-stack migration scheme, a geological model cannot be imaged properly. For the viscoacoustic pre-stack depth migration scheme, extrapolation operators could compensate for absorption and dispersion, and a proper image be obtained.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it