Piston cylinder pressure balance design with a negligible distortion coefficient
Bibliographic record
Abstract
Finite element techniques have been used to design a controlled-clearance piston–cylinder pressure balance for operation in liquid media in the 250 MPa range in which the effective area is predictable, insensitive to variations in key geometrical and material parameters, and in which the distortion coefficient is negligible. The property which must be known most accurately is the Poisson's ratio of the piston–cylinder materials. The design is relatively insensitive to changes in Young's modulus. Finite element methods are shown to be a powerful technique for investigating the performance of pressure balances. It is demonstrated that, for the geometry in question, the free deformation mode of operation cannot meet these criteria, owing to its predicted distortion coefficient of 0.7164 ppm MPa−1, compared with 0.0012 ppm MPa−1 for the controlled-clearance design.
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How this classification was reachedexpand
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".