Search Results for author: Carlos Lima Azevedo

Found 9 papers, 5 papers with code

Applied metamodelling for ATM performance simulations

no code implementations7 Aug 2023 Christoffer Riis, Francisco N. Antunes, Tatjana Bolić, Gérald Gurtner, Andrew Cook, Carlos Lima Azevedo, Francisco Câmara Pereira

Lastly, we discuss two practical approaches for reducing the computational burden of the metamodelling further: we introduce a stopping criterion for active learning based on the inherent uncertainty of the metamodel, and we show how the simulations used for the metamodel can be reused across key performance indicators, thus decreasing the overall number of simulations needed.

Active Learning Decision Making +1

Scoring Cycling Environments Perceived Safety using Pairwise Image Comparisons

1 code implementation25 Jul 2023 Miguel Costa, Manuel Marques, Felix Wilhelm Siebert, Carlos Lima Azevedo, Filipe Moura

Furthermore, this approach facilitates the continuous assessment of changing cycling environments, allows for a short-term evaluation of measures, and is efficiently deployed in different locations or contexts.

Attitudes and Latent Class Choice Models using Machine learning

no code implementations20 Feb 2023 Lorena Torres Lahoz, Francisco Camara Pereira, Georges Sfeir, Ioanna Arkoudi, Mayara Moraes Monteiro, Carlos Lima Azevedo

Latent Class Choice Models (LCCM) are extensions of discrete choice models (DCMs) that capture unobserved heterogeneity in the choice process by segmenting the population based on the assumption of preference similarities.

Discrete Choice Models

Bayesian Active Learning with Fully Bayesian Gaussian Processes

2 code implementations20 May 2022 Christoffer Riis, Francisco Antunes, Frederik Boe Hüttel, Carlos Lima Azevedo, Francisco Câmara Pereira

In active learning, where labeled data is scarce or difficult to obtain, neglecting this trade-off can cause inefficient and non-optimal querying, leading to unnecessary data labeling.

Active Learning Gaussian Processes

Combining Discrete Choice Models and Neural Networks through Embeddings: Formulation, Interpretability and Performance

1 code implementation24 Sep 2021 Ioanna Arkoudi, Carlos Lima Azevedo, Francisco C. Pereira

The novelty of our work lies in enforcing interpretability to the embedding vectors by formally associating each of their dimensions to a choice alternative.

Discrete Choice Models

Market Design for Tradable Mobility Credits

no code implementations3 Jan 2021 Siyu Chen, Ravi Seshadri, Carlos Lima Azevedo, Arun P. Akkinepally, Renming Liu, Andrea Araldo, Yu Jiang, Moshe E. Ben-Akiva

Further, it is more robust in the presence of forecasting errors and non-recurrent events due to the adaptiveness of the market.

Management

QTIP: Quick simulation-based adaptation of Traffic model per Incident Parameters

1 code implementation9 Mar 2020 Inon Peled, Raghuveer Kamalakar, Carlos Lima Azevedo, Francisco C. Pereira

In a nutshell, QTIP performs real-time simulations of the affected road for multiple scenarios, analyzes the results, and suggests a change to an ordinary prediction model accordingly.

Traffic Prediction

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