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Record W2111553330

On optimal alarm filter design

2011· article· en· W2111553330 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueInternational Symposium on Advanced Control of Industrial Processes · 2011
Typearticle
Languageen
FieldEngineering
TopicFault Detection and Control Systems
Canadian institutionsUniversity of Alberta
Fundersnot available
KeywordsFilter (signal processing)ALARMConstant false alarm rateFalse alarmFilter designMathematical optimizationOptimal designAlgorithmComputer scienceStatisticComputationMathematicsControl theory (sociology)StatisticsArtificial intelligenceEngineering
DOInot available

Abstract

fetched live from OpenAlex

Accuracy and efficiency of alarm systems are of paramount importance in safe operations of industrial processes. Accuracy is measured by false and missed alarm rates; while efficiency relates to the detection delay and complexity of the technique used. Moving average filters are often employed in industry for improved alarm accuracy at the expense of some detection delay. Can one do better than moving average filters? The following problem is studied in this paper: Given statistic distributions of both normal and abnormal conditions, and relatively fixed filter complexity, design an optimal alarm filter for best alarm accuracy, minimizing a weighted sum of false and missed alarm rates (probabilities). It turns out that the general form of such optimal alarm filters is the so called log-likelihood ratio (LLR) filters, which can be highly nonlinear and difficult to implement in practice. With fixed filter structures (first or second order), design of optimal linear alarm filters and optimal quadratic alarm filters is studied, and numerical optimization based procedures are proposed. Some key elements in the optimal design include use of characteristic functions from probability theory to facilitate computation of the objective function, and a DE algorithm for optimization (the optimization problem is non-convex and with small gradients in some area). The validity of the proposed methods is illustrated by several design examples in which the optimal filters in the general, linear and quadratic forms are computed, and their relative performance in alarm accuracy is fully discussed.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.765
Threshold uncertainty score0.856

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.029
GPT teacher head0.234
Teacher spread0.205 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it