A nonlinear large signal equivalent circuit model for a square CMUT cell
Bibliographic record
Abstract
Using analytical calculations, a precise large signal equivalent circuit model of square CMUT dynamics was developed. The model predicts many intrinsic properties of a square CMUT cell including resonance frequency, phase and magnitude of the membrane displacement, membrane velocity, electrical conductance, collapse voltage, etc. ANSYS 3D finite element analysis (FEA) was used to validate the equivalent circuit model predictions by performing static, pre-stressed harmonic and nonlinear transient analysis. The model was designed and implemented in a circuit simulator and then compared with finite element methods (FEM) and experimental results. The results were compared with circular CMUT cells when the half-side-length of the square CMUT is assumed to be equal to the radii of the circular CMUT cell. A silicon-nitride standard sacrificial release process was used to fabricate the square CMUT cells. The experimental results obtained by a laser vibrometer were compared with circuit simulations and the results showed excellent agreements.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".