Search Results for author: Zita Marinho

Found 16 papers, 9 papers with code

\infty-former: Infinite Memory Transformer

1 code implementation ACL 2022 Pedro Henrique Martins, Zita Marinho, Andre Martins

Transformers are unable to model long-term memories effectively, since the amount of computation they need to perform grows with the context length.

Dialogue Generation Language Modelling

Chunk-based Nearest Neighbor Machine Translation

1 code implementation24 May 2022 Pedro Henrique Martins, Zita Marinho, André F. T. Martins

Semi-parametric models, which augment generation with retrieval, have led to impressive results in language modeling and machine translation, due to their ability to retrieve fine-grained information from a datastore of examples.

Domain Adaptation Language Modelling +3

Efficient Machine Translation Domain Adaptation

1 code implementation SpaNLP (ACL) 2022 Pedro Henrique Martins, Zita Marinho, André F. T. Martins

On the other hand, semi-parametric models have been shown to successfully perform domain adaptation by retrieving examples from an in-domain datastore (Khandelwal et al., 2021).

Domain Adaptation Language Modelling +3

Model-Value Inconsistency as a Signal for Epistemic Uncertainty

no code implementations8 Dec 2021 Angelos Filos, Eszter Vértes, Zita Marinho, Gregory Farquhar, Diana Borsa, Abram Friesen, Feryal Behbahani, Tom Schaul, André Barreto, Simon Osindero

Unlike prior work which estimates uncertainty by training an ensemble of many models and/or value functions, this approach requires only the single model and value function which are already being learned in most model-based reinforcement learning algorithms.

Model-based Reinforcement Learning Rolling Shutter Correction

Self-Consistent Models and Values

no code implementations NeurIPS 2021 Gregory Farquhar, Kate Baumli, Zita Marinho, Angelos Filos, Matteo Hessel, Hado van Hasselt, David Silver

Learned models of the environment provide reinforcement learning (RL) agents with flexible ways of making predictions about the environment.

reinforcement-learning Reinforcement Learning (RL)

$\infty$-former: Infinite Memory Transformer

1 code implementation1 Sep 2021 Pedro Henrique Martins, Zita Marinho, André F. T. Martins

Transformers are unable to model long-term memories effectively, since the amount of computation they need to perform grows with the context length.

Dialogue Generation Language Modelling

Priberam at MESINESP Multi-label Classification of Medical Texts Task

1 code implementation12 May 2021 Ruben Cardoso, Zita Marinho, Afonso Mendes, Sebastião Miranda

Information retrieval tools are crucial in order to navigate and provide meaningful recommendations for articles and treatments.

Classification Extreme Multi-Label Classification +3

Nova-Wang at SemEval-2020 Task 12: OffensEmblert: An Ensemble ofOffensive Language Classifiers

no code implementations SEMEVAL 2020 Susan Wang, Zita Marinho

Our best model, an average ensemble of four different Bert models, achieved 11th place out of 82 participants with a macro F1 score of 0. 91344 in the English SubTask A.

Classification regression

Sparse Text Generation

1 code implementation EMNLP 2020 Pedro Henrique Martins, Zita Marinho, André F. T. Martins

Current state-of-the-art text generators build on powerful language models such as GPT-2, achieving impressive performance.

Dialogue Generation Language Modelling +1

Sparse and Structured Visual Attention

1 code implementation13 Feb 2020 Pedro Henrique Martins, Vlad Niculae, Zita Marinho, André Martins

Visual attention mechanisms are widely used in multimodal tasks, as visual question answering (VQA).

Image Captioning Question Answering +1

Joint Learning of Named Entity Recognition and Entity Linking

no code implementations ACL 2019 Pedro Henrique Martins, Zita Marinho, André F. T. Martins

Named entity recognition (NER) and entity linking (EL) are two fundamentally related tasks, since in order to perform EL, first the mentions to entities have to be detected.

Entity Linking Multi-Task Learning +3

Hierarchical Nested Named Entity Recognition

no code implementations WS 2019 Zita Marinho, Afonso Mendes, Mir, Sebasti{\~a}o a, David Nogueira

In the medical domain and other scientific areas, it is often important to recognize different levels of hierarchy in mentions, such as those related to specific symptoms or diseases associated with different anatomical regions.

named-entity-recognition Named Entity Recognition +1

Automated Fact Checking in the News Room

no code implementations3 Apr 2019 Sebastião Miranda, David Nogueira, Afonso Mendes, Andreas Vlachos, Andrew Secker, Rebecca Garrett, Jeff Mitchel, Zita Marinho

Fact checking is an essential task in journalism; its importance has been highlighted due to recently increased concerns and efforts in combating misinformation.

Fact Checking Misinformation

Recurrent Predictive State Policy Networks

2 code implementations ICML 2018 Ahmed Hefny, Zita Marinho, Wen Sun, Siddhartha Srinivasa, Geoffrey Gordon

Predictive state policy networks consist of a recursive filter, which keeps track of a belief about the state of the environment, and a reactive policy that directly maps beliefs to actions, to maximize the cumulative reward.

OpenAI Gym

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