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Record W4251923949 · doi:10.22215/etd/2018-12718

Configurable FPGA-Based Outlier Detection for Time Series Data

2018· dissertation· en· W4251923949 on OpenAlexaff
Ghazaleh Vazhbakht

Bibliographic record

Venuenot available
Typedissertation
Languageen
FieldComputer Science
TopicAnomaly Detection Techniques and Applications
Canadian institutionsCarleton University
Fundersnot available
KeywordsField-programmable gate arrayOutlierComputer scienceMATLABAnomaly detectionFloating pointSeries (stratigraphy)Embedded systemReal-time computingComputer hardwareAlgorithmData miningArtificial intelligence

Abstract

fetched live from OpenAlex

A configurable FPGA-based outlier detection hardware is presented. The FPGA implementation reduces the power consumption by 89% compared to the existing software implementations. The implemented outlier detection technique is based on the joint estimation of model parameters and outlier effects in time series. A configuration of our implementation is capable of detecting multiple additive outliers with a detection accuracy of 99% and has a false positive rate of 1.05%.We used the MATLAB implementation of the technique to compare its accuracy to the implementation in "tsoutliers" package of R. Using the HDL Coder, we generated a configurable hardware implementation. The design is configurable by adjusting the number of iterations for the optimization process, the number of samples, and the critical value. A configuration of this design has a total power dissipation of 1.14W, while processing 35 million data points per second, giving an energy usage of 0.032 microjoule per processed data point.

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.

How this classification was reachedexpand

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: Not applicable · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.659
Threshold uncertainty score0.850

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 communication0.0000.001
Open science0.0010.000
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 head0.022
GPT teacher head0.288
Teacher spread0.267 · 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

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designNot applicable
Domainnot available
GenreMethods

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".

Quick stats

Citations0
Published2018
Admission routes1
Has abstractyes

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