Acoustic reflectivity enhancement using higher-order nonlinear reflection mode
Why this work is in the frame
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Bibliographic record
Abstract
Acoustic wave reflection is studied for sharp nonlinear inhomogeneities embedded into nonlinear medium with similar linear characteristics. The higher-order nonlinear reflection mode is used to increase the reflectivity of such inclusions "invisible" in a linearly reflected field. For YZ-LiNbO/sub 3/ the discontinuity in nonlinear properties was measured to be the most dramatic for the SAW third harmonic generated in the area of the contact acoustic nonlinearity (simulating a closed crack) and acousto-electronic nonlinearity (piezoelectric-semiconductor structure). The experiments revealed from 3 to 4 orders of magnitude increase in reflectivity of the nonlinear inhomogeneities for the third-order nonlinear reflection mode.
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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) | 0.003 | 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