Efficient Algorithm for the Nonadditive Traffic Assignment Problem With Link Capacity Constraints
Bibliographic record
Abstract
This paper presents an insightful examination of the modeling and efficient solution algorithm for the link capacitated nonadditive traffic assignment problem (CNaTAP) to provide highly accurate flow solutions for large‐scale networks. Despite the increasing significance of the CNaTAP, the ability to efficiently solve it for satisfactory accuracy in practical applications remains inadequate. Given that existing CNaTAP models and algorithms are typically limited to small experimental networks, the CNaTAP model is formulated as a variational inequality (VI) problem in this paper. This formulation is decomposed into two VI subproblems that involve equilibrium and capacity constraints, utilizing the Karush–Kuhn–Tucker (KKT) conditions. The Lagrangian multipliers for the capacity constraints are treated as fixed costs for the links in the equilibrium subproblem, ensuring the stability of the Cartesian product structure within the feasible set. This approach facilitates the decomposition of OD pairs, enabling the efficient solution of CNaTAP in large‐scale networks. In addition, an algorithmic framework is developed that incorporates high‐frequency updates of these Lagrangian multipliers, along with an adaptive Barzilai–Borwein (ABB) step‐size calculation method applied to expedite convergence in the equilibrium subproblem. Extensive numerical experiments confirm the efficacy of the proposed algorithm in efficiently solving large‐scale networks with high convergence accuracy.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.008 | 0.002 |
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.
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".