Détermination expérimentale d'une loi de tassement du ballast des voies ferrées soumises à un chargement latéral
Bibliographic record
Abstract
A one-third scale bench test representing a portion of railway track has permited to determine a lateral settlement law of the ballast. The experimentation uses a two-block sleeper with ballast and with elastomeric or wood representing the soil. A jack exerts the same signal as the train. Two similitudes have been tried with the bench test. The first one conserves the volumetric mass of the ballast and the stresses just under the blocks, and the second one conserves the volumetric mass of the ballast and the acceleration. Measured settlements are different in the two cases of similitude. From this it may be deduced that one phenomenon is responsible for the settlement: vibrations. We have identified two laws for the lateral settlement of the ballast: one for a few cycles and another one for a lot of cycles. The sum of these two laws can describe the whole behaviour of the ballast. These laws are in accordance with the measurements made on track.Key words: ballast, settlement, experimentation, reduced scale, railroad track.
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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 | 0.003 |
| 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 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".