Acceleration of Measurements in BOTDA Sensors Using Adaptive Linear Prediction
Bibliographic record
Abstract
A conventional method to denoise signals in Brillouin optical time-domain analysis (BOTDA) sensors is ensemble averaging. This method necessitates the acquisition of thousands of signals to provide an acceptable signal-to-noise ratio (SNR). The signal acquisition is a time-consuming process that drastically increases the measurement time of BOTDA sensors. This paper presents a novel method on the basis of the adaptive linear prediction (ALP) technique to reduce the measurement time of such sensors. The conventional setup of BOTDA sensors is modified to denoise signals using the ALP technique before applying ensemble averaging. The application of the ALP technique removes a significant portion of noise while it preserves the abrupt changes and smooth pieces of signals. As a result, the number of signals required to obtain accurate measurements and, consequently, the measurement time of the sensor are reduced by up to 90%. This modification enables BODTA sensors to implement dynamic measurements of temperature and strain and opens opportunities to address a new range of applications.
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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) | 0.001 | 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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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".