no code implementations • 19 Feb 2024 • Frederik Boe Hüttel, Christoffer Riis, Filipe Rodrigues, Francisco Câmara Pereira
To address this, we derive the entropy and the mutual information for censored distributions and derive the BALD objective for active learning in censored regression ($\mathcal{C}$-BALD).
no code implementations • 10 Jan 2024 • Carolin Schmidt, Mathias Tygesen, Filipe Rodrigues
Finally, we identify dwell time prediction as the key determinant in overall AT prediction accuracy when autonomous shuttles are deployed in low-traffic areas or under regulatory speed limits.
no code implementations • 21 Aug 2023 • Frederik Boe Hüttel, Filipe Rodrigues, Francisco Câmara Pereira
The proposed method is based on evidential learning, which allows the model to capture aleatoric and epistemic uncertainty with a single deterministic forward-pass model.
1 code implementation • 16 May 2023 • Daniele Gammelli, James Harrison, Kaidi Yang, Marco Pavone, Filipe Rodrigues, Francisco C. Pereira
Optimization problems over dynamic networks have been extensively studied and widely used in the past decades to formulate numerous real-world problems.
no code implementations • 27 Mar 2023 • Zhongcan Li, Ping Huang, Chao Wen, Filipe Rodrigues
This paper aims to develop a heterogeneous graph neural network (HetGNN) model, which can address different types of nodes (i. e., heterogeneous nodes), to investigate the train delay evolution on railway networks.
2 code implementations • 28 Feb 2023 • Carolin Schmidt, Daniele Gammelli, Francisco Camara Pereira, Filipe Rodrigues
Autonomous Mobility-on-Demand (AMoD) systems are an evolving mode of transportation in which a centrally coordinated fleet of self-driving vehicles dynamically serves travel requests.
1 code implementation • 16 Jan 2023 • Frederik Boe Hüttel, Filipe Rodrigues, Francisco Câmara Pereira
As a result, machine learning models that rely on these observed records for forecasting charging demand may be limited in their application in future infrastructure expansion and supply management, as they do not estimate the true demand for charging.
no code implementations • 11 Oct 2022 • Mirosława Łukawska, Anders Fjendbo Jensen, Filipe Rodrigues
This paper proposes an effective approach to model context-dependent intra-respondent heterogeneity, thereby introducing the concept of the Context-aware Bayesian mixed multinomial logit model, where a neural network maps contextual information to interpretable shifts in the preference parameters of each individual in each choice occasion.
no code implementations • 9 Aug 2022 • Niklas Petersen, Filipe Rodrigues, Francisco Pereira
We present a vector-space model for encoding rare temporal conditions, that allows coherent representation learning across different temporal conditions.
1 code implementation • 6 Mar 2022 • Filipe Rodrigues
Over the last years, the transportation community has witnessed a tremendous amount of research contributions on new deep learning approaches for spatio-temporal forecasting.
1 code implementation • 15 Feb 2022 • Daniele Gammelli, Kaidi Yang, James Harrison, Filipe Rodrigues, Francisco C. Pereira, Marco Pavone
Autonomous Mobility-on-Demand (AMoD) systems represent an attractive alternative to existing transportation paradigms, currently challenged by urbanization and increasing travel needs.
1 code implementation • 25 Jan 2022 • Mathias Niemann Tygesen, Francisco C. Pereira, Filipe Rodrigues
Our approach has several advantages: 1) a Variational Auto Encoder structure allows for the graph to be dynamically determined by the data, potentially changing through time; 2) the encoder structure allows the use of external data in the generation of the graph; 3) it is possible to place Bayesian priors on the generated graphs to encode domain knowledge.
1 code implementation • 28 Jul 2021 • Daniele Gammelli, Yihua Wang, Dennis Prak, Filipe Rodrigues, Stefan Minner, Francisco Camara Pereira
Bike-sharing systems are a rapidly developing mode of transportation and provide an efficient alternative to passive, motorized personal mobility.
1 code implementation • 21 Jun 2021 • Frederik Boe Hüttel, Inon Peled, Filipe Rodrigues, Francisco C. Pereira
To meet this requirement, accurate forecasting of the charging demand is vital.
1 code implementation • 23 Apr 2021 • Daniele Gammelli, Kaidi Yang, James Harrison, Filipe Rodrigues, Francisco C. Pereira, Marco Pavone
Autonomous mobility-on-demand (AMoD) systems represent a rapidly developing mode of transportation wherein travel requests are dynamically handled by a coordinated fleet of robotic, self-driving vehicles.
no code implementations • 14 Apr 2021 • Niklas Christoffer Petersen, Anders Parslov, Filipe Rodrigues
This paper presents two novel approaches for uncertainty estimation adapted and extended for the multi-link bus travel time problem.
no code implementations • 2 Apr 2021 • Frederik Boe Hüttel, Inon Peled, Filipe Rodrigues, Francisco C. Pereira
We address this gap by extending current Censored Quantile Regression models to learn multiple quantiles at once and apply these to synthetic baseline datasets and datasets from two shared mobility providers in the Copenhagen metropolitan area in Denmark.
no code implementations • 28 Jan 2021 • Georges Sfeir, Filipe Rodrigues, Maya Abou-Zeid
We present a Gaussian Process - Latent Class Choice Model (GP-LCCM) to integrate a non-parametric class of probabilistic machine learning within discrete choice models (DCMs).
1 code implementation • 10 Sep 2020 • Daniele Gammelli, Kasper Pryds Rolsted, Dario Pacino, Filipe Rodrigues
When modelling censored observations, a typical approach in current regression methods is to use a censored-Gaussian (i. e. Tobit) model to describe the conditional output distribution.
no code implementations • 6 Jul 2020 • Georges Sfeir, Maya Abou-Zeid, Filipe Rodrigues, Francisco Camara Pereira, Isam Kaysi
The proposed model formulates the latent classes using mixture models as an alternative approach to the traditional random utility specification with the aim of comparing the two approaches on various measures including prediction accuracy and representation of heterogeneity in the choice process.
1 code implementation • ICML Workshop INNF 2021 • Daniele Gammelli, Filipe Rodrigues
Mobility-on-demand (MoD) systems represent a rapidly developing mode of transportation wherein travel requests are dynamically handled by a coordinated fleet of vehicles.
no code implementations • 11 Apr 2020 • Filipe Rodrigues
Variational inference methods have been shown to lead to significant improvements in the computational efficiency of approximate Bayesian inference in mixed multinomial logit models when compared to standard Markov-chain Monte Carlo (MCMC) methods without compromising accuracy.
1 code implementation • 21 Jan 2020 • Daniele Gammelli, Inon Peled, Filipe Rodrigues, Dario Pacino, Haci A. Kurtaran, Francisco C. Pereira
Transport demand is highly dependent on supply, especially for shared transport services where availability is often limited.
no code implementations • 10 Jun 2019 • Filipe Rodrigues, Nicola Ortelli, Michel Bierlaire, Francisco Pereira
Specifying utility functions is a key step towards applying the discrete choice framework for understanding the behaviour processes that govern user choices.
1 code implementation • 17 Apr 2019 • Filipe Rodrigues, Carlos Lima Azevedo
Reinforcement learning (RL) constitutes a promising solution for alleviating the problem of traffic congestion.
no code implementations • 7 Mar 2019 • Niklas Christoffer Petersen, Filipe Rodrigues, Francisco Camara Pereira
Accurate and reliable travel time predictions in public transport networks are essential for delivering an attractive service that is able to compete with other modes of transport in urban areas.
no code implementations • 20 Dec 2018 • Filipe Rodrigues, Francisco C. Pereira
Accurately modeling traffic speeds is a fundamental part of efficient intelligent transportation systems.
no code implementations • 20 Dec 2018 • Filipe Rodrigues, Stanislav S. Borysov, Bernardete Ribeiro, Francisco C. Pereira
Public special events, like sports games, concerts and festivals are well known to create disruptions in transportation systems, often catching the operators by surprise.
no code implementations • 20 Dec 2018 • Filipe Rodrigues, Kristian Henrickson, Francisco C. Pereira
Traffic speed data imputation is a fundamental challenge for data-driven transport analysis.
1 code implementation • 27 Aug 2018 • Filipe Rodrigues, Francisco C. Pereira
Spatio-temporal problems are ubiquitous and of vital importance in many research fields.
no code implementations • 17 Aug 2018 • Filipe Rodrigues, Mariana Lourenço, Bernardete Ribeiro, Francisco Pereira
The growing need to analyze large collections of documents has led to great developments in topic modeling.
no code implementations • 16 Aug 2018 • Filipe Rodrigues, Ioulia Markou, Francisco Pereira
Accurate time-series forecasting is vital for numerous areas of application such as transportation, energy, finance, economics, etc.
3 code implementations • 6 Sep 2017 • Filipe Rodrigues, Francisco Pereira
Over the last few years, deep learning has revolutionized the field of machine learning by dramatically improving the state-of-the-art in various domains.
1 code implementation • LREC 2016 • Adriana Ferrugento, Hugo Gon{\c{c}}alo Oliveira, Ana Alves, Filipe Rodrigues
This paper proposes a new topic model that exploits word sense information in order to discover less redundant and more informative topics.