Weak contrast inhomogeneous PP-reflection coefficient in low-loss attenuative media
Bibliographic record
Abstract
A useful four term Amplitude Variation with Offset (AVO) equation for inhomogeneous PP-wave reflection coefficient for a weak contrast separating two isotropic low-loss viscoelastic media has been derived. This coefficient is complex and linearly depends on the fractional changes in elastic properties as well as sensitive to P- and S-wave quality factors. Comparing to the elastic PP-reflectivity, which for small angles has contributions at zeroth and second order in sinθP, we show that the viscoelastic reflectivity is function of sinθP from zeroth up to third order, where the first and third orders are related to the case that waves are inhomogeneous. In a second decomposition the reflectivity can be split up into elastic, anelastic-homogeneous and anelastic-inhomogeneous terms. For incident angles sufficiently smaller than the critical angles, we compare our four term AVO equations to the exact reflectivity as a solution of Zoeppritz equations. Presentation Date: Thursday, October 20, 2016 Start Time: 8:30:00 AM Location: 174 Presentation Type: ORAL
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".