Modeling and measurements of triaxial tests for a sandy loam soil
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Bibliographic record
Abstract
The knowledge and understanding of soil mechanical properties is essential for designing agricultural machines. However, little information is available regarding shear properties of agricultural soil. In this study, triaxial compression tests were performed to measure shear properties of a sandy loam soil at three moisture levels: low (10.5±0.5%), medium (19±1.0%), and high (28±1.0%), and three confining pressures of 50, 100, and 150 kPa. A discrete element model was developed to simulate the triaxial compression tests. The test results showed a linear increase in soil shear strength at a decreased soil moisture level and an increased confining pressure. The effect of moisture level on the modulus of elasticity changed with the confining pressure. The highest modulus of elasticity was observed for the low moisture level with 150 kPa confining pressure. The model results showed that the particle friction coefficient was the most influential model micro-parameter to the simulated soil shear strength. This model micro-parameter was calibrated with the triaxial test data. The calibrated particle friction coefficients varied from 0.2 to 1.0, depending on the soil moisture content and confining pressure. As compared to the test data, the simulated soil shear strengths had relative errors ranging from 0 to 6%.
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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