Effect of the stability factor on the accuracy of two-dimensional TD-FD simulation
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Bibliographic record
Abstract
The effect of the stability factor on the computational accuracy of the time-domain finite-difference method using Maxwell's two curl equations is systematically tested for an initial boundary value problem in electromagnetics. A rectangular waveguide is chosen as the computational domain with matching and reflecting boundaries in two dimensions. The TE/sub 10/ mode is excited as an initial condition. A standing wave envelope is numerically formulated; s/sub max/ and S/sub min/ are sampled as in slotted-line measurements. Simulation results for different values of the stability factor are compared with the value 'unity' of the standing wave envelope in the matched condition. Generally, accuracy is not very sensitive to variations in the stability factor. But better accuracy has been observed at around SF=0.7 than at lower values of the stability factor. For both accuracy and economy reasons the authors suggest that a stability factor close to 0.7 should be chosen.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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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 | 0.001 |
| 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 | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
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