THE FEATURES OF THE PROPAGATION OF ELASTIC WAVES IN ISOTROPIC MEDIA AT HIGH AND ULTRA-HIGH PRESSURES
Bibliographic record
Abstract
AND ULTRA-HIGH PRESSURES (Рекомендовано членом редакційної колегії д-ром фіз.-мат. наук, проф. Б.П. Масловим) Studies of problems of the propagation of elastic waves in the geological medium constitute the scientific basis of the processing and interpretation of dataset of seismic exploration and seismological works.Objective.Creation of a more grounded theoretical basis of the geomechanical interpretation of various groups of geophysical observational and experimental data.Methodology.Nonclassical-linearized approach of non-linear elastodynamics.Linear and nonlinear small and large initial deformations are taken into account.The strain processes are described applying various elastic potentials. Results. Analytical dependences of the parameters of pressure and velocities of propagation of elastic waves on deformations without additional linearization are obtained within the framework of various versions of the theory of small and initial deformations using the quadratic and elastic potentials of the Murnaghan type. Scientific novelty. It is established that there are critical values of deformation while reaching them elastic pressure and shear waves with true velocity cannot propagate in uniformly deformed elastic isotropic media. The quantitative values of the critical values of deformations for pressure and shear waves differ, and essentially depend on the applied elastic potentials.Practical significance.The obtained analytical dependences allow synthesizing the true values of the elastic parameters of the deformed media from seismic exploration and seismological dataset.The establishment of critical deformations for velocities of pressure and shear waves will make it possible to suggest differential criteria of the distribution of elastic parameters in theoretical models of the Earth in its various structural elements as a whole and separately.
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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 | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 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".