Papers by Vitor Carvalho
Multimodal Named Entity Disambiguation for Noisy Social Media Posts (P18-1)
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| Challenge: | Social media posts often contain unstructured text or images, making opinion mining challenging. |
| Approach: | They propose a new task for multimodal social media captions with named entities annotated and linked to external knowledge bases. |
| Outcome: | The proposed model outperforms state-of-the-art text-only NED models . it predicts correct entities in knowledge graph embeddings space, showing its efficacy and potentials . |
Reversing Gradients in Adversarial Domain Adaptation for Question Deduplication and Textual Entailment Tasks (P19-1)
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| Challenge: | Existing domain adaptation techniques for question deduplication and RTE focus on transferring category independent knowledge between domains. |
| Approach: | They propose to use gradient reversal to explicitly learn shared and unshared (domain specific) representations between two textual domains to compensate for domain mismatch while distilling domain specific knowledge. |
| Outcome: | The proposed approach outperforms other methods on question deduplication and on recognizing textual entailment tasks, while still distilling domain specific knowledge. |
Visual Attention Model for Name Tagging in Multimodal Social Media (P18-1)
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| Challenge: | Name tagging is a key task for language understanding, but is often limited by the short textual components. |
| Approach: | They propose a novel model architecture based on visual attention that outperforms other methods . they use multimodal datasets to analyze the name tagging task on social media . |
| Outcome: | The proposed model outperforms existing methods and significantly outperformed existing methods. |
Multimodal Named Entity Recognition for Short Social Media Posts (N18-1)
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| Challenge: | Social media posts often contain inconsistent or incomplete syntax and lexical notations with limited textual contexts. |
| Approach: | They propose a task called Multimodal Named Entity Recognition (MNER) for noisy user-generated data . they use a dataset called SnapCaptions to build upon the state-of-the-art NER models . |
| Outcome: | The proposed model outperforms existing models on noisy user-generated data . it uses a deep image network and generic modality attention module . |