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Record W4248387994 · doi:10.22215/etd/2017-11851

Efficient DC Analysis Using Model Order Reduction

2017· dissertation· en· W4248387994 on OpenAlexaff
Qi Sun

Bibliographic record

Venuenot available
Typedissertation
Languageen
FieldPhysics and Astronomy
TopicModel Reduction and Neural Networks
Canadian institutionsCarleton University
Fundersnot available
KeywordsParameterized complexityModel order reductionReduction (mathematics)Subspace topologyKrylov subspaceNonlinear systemNewton's methodComputer scienceMoment (physics)AlgorithmMathematical optimizationApplied mathematicsMathematicsIterative methodArtificial intelligence

Abstract

fetched live from OpenAlex

For nonlinear circuits, DC analysis is one of the circuit simulation applications.The conventional source stepping continuation method is computationally expensive to do the Newton-Raphson iteration due to the large numbers of nonlinear functions and the inversion of a large matrix.It is also hard to find an efficient algorithm to do the Model Order Reduction (MOR), DC analysis and the parameterized analysis for nonlinear systems.To address the above difficulties, a novel method is proposed in this thesis for the DC analysis and the parameterized analysis.This new approach reduces the computational cost by applying the model order reduction technique to the original model.The model size of the reduced order model is much smaller, thus the computational time will be saved during the Newton-Raphson iteration.In addition, the proposed method solves the MOR problem for the nonlinear vector by applying the DEIM algorithm.Furthermore, the format of the DC solution parameterized analysis is provided.To the end, basing on the new circuit equation format, a method to compute the moment subspace is presented after applying the DEIM approximation.Pertinent numerical results are presented to verify the proposed algorithm.The simulation result also demonstrates the efficiency of the new method to solve the nonlinear equations. J(x)Jacobian function ζ Jacobian function of the circuit parameter F k Kth moment of the nonlinear function J k Kth moment of the Jacobian function U projection base of the nonlinear function Γ nonlinear function interpolation indices P DEIM selection matrix xiv

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 machine prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.008
Threshold uncertainty score0.027

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.001
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0010.001
Bibliometrics0.0010.001
Science and technology studies0.0010.000
Scholarly communication0.0010.001
Open science0.0010.001
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0080.002

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 head0.317
Teacher spread0.288 · 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 source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designSimulation or modeling
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
Published2017
Admission routes1
Has abstractyes

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