Papers by Phillippe Langlais
End-to-End Self-Debiasing Framework for Robust NLU Training (2021.findings-acl)
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| Challenge: | Existing models incorporate dataset biases leading to strong performance on in-distribution test sets but poor performance on out-of-distortion (OOD) tests. |
| Approach: | They propose a debiasing framework where the shallow representations of the main model are used to derive a bias model and both models are trained simultaneously. |
| Outcome: | The proposed framework outperforms existing approaches on three well-studied NLU tasks while still delivering high in-distribution performance. |
Contextualized Word Representations from Distant Supervision with and for NER (D19-55)
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| Challenge: | Existing word embeddings for named entity recognition are stacked with traditional ones for downstream tasks. |
| Approach: | They propose a special type of contextualized word representation that is learned from distant supervision annotations and dedicated to named entity recognition. |
| Outcome: | The proposed representation surpasses the existing representations and is complementary to existing embeddings. |
SEDAR: a Large Scale French-English Financial Domain Parallel Corpus (2020.lrec-1)
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| Challenge: | Existing approaches for neural machine translation use small amount of data or monolingual data. |
| Approach: | They describe acquisition, preprocessing and characteristics of a large English-French parallel corpus for the financial domain. |
| Outcome: | The proposed corpus contains 8.6 million high quality sentence pairs . the first release of the corpus is available on github. |
Improving Generalization of Pre-trained Language Models via Stochastic Weight Averaging (2022.findings-emnlp)
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| Challenge: | Recent studies show that the flatness of the local minimum correlates well with better generalization. |
| Approach: | They propose to use a method encouraging convergence to a flatter minimum to fine-tune PLMs. |
| Outcome: | The proposed method outperforms state-of-the-art methods on NLP tasks without extra computation cost. |
Human or Neural Translation? (2020.coling-main)
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Shivendra Bhardwaj, David Alfonso Hermelo, Phillippe Langlais, Gabriel Bernier-Colborne, Cyril Goutte, Michel Simard
| Challenge: | a recent study shows that deep neural models have improved machine translation . identifying machine translation is still feasible, but is not yet known. |
| Approach: | They train and apply deep neural models to distinguish between human and machine translations . they use a monolingual and bilingual task to train and train 18 classifiers based on their results . |
| Outcome: | The proposed model improves the ability to distinguish between human and machine translations at the sentence level. |
HardEval: Focusing on Challenging Tokens to Assess Robustness of NER (2020.lrec-1)
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| Challenge: | Named entity recognition (NER) systems are often evaluated on human annotations . a new evaluation method focuses on subsets of tokens that represent specific sources of errors . |
| Approach: | They propose a method that focuses on subsets of tokens that represent specific sources of errors. |
| Outcome: | The proposed evaluation method focuses on subsets of tokens that represent specific sources of errors. |
Robust Lexical Features for Improved Neural Network Named-Entity Recognition (C18-1)
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| Challenge: | Named-Entity Recognition (NER) uses word embeddings to extend, rather than replace, hand-crafted features. |
| Approach: | They propose to embed words and entity types into a low-dimensional vector space and compute a feature vector representing each word offline. |
| Outcome: | The proposed representations outperform existing models and achieve state-of-the-art performance. |
Revisiting Pre-trained Language Models and their Evaluation for Arabic Natural Language Processing (2022.emnlp-main)
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Abbas Ghaddar, Yimeng Wu, Sunyam Bagga, Ahmad Rashid, Khalil Bibi, Mehdi Rezagholizadeh, Chao Xing, Yasheng Wang, Xinyu Duan, Zhefeng Wang, Baoxing Huai, Xin Jiang, Qun Liu, Phillippe Langlais
| Challenge: | Existing pre-trained language models are not well-explored and are not reproducible in the literature. |
| Approach: | They propose to improve existing Arabic language pre-trained language models using a more methodical approach. |
| Outcome: | The proposed models outperform existing models on ALUE, a leaderboard-powered benchmark for Arabic NLU and NLG tasks. |
CILDA: Contrastive Data Augmentation Using Intermediate Layer Knowledge Distillation (2022.coling-1)
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Md Akmal Haidar, Mehdi Rezagholizadeh, Abbas Ghaddar, Khalil Bibi, Phillippe Langlais, Pascal Poupart
| Challenge: | Knowledge distillation (KD) is an efficient framework for compressing large-scale pre-trained language models. |
| Approach: | They propose a data augmentation technique tailored for knowledge distillation based on contrastive loss to improve masked adversarial data augmented by intermediate layer matching. |
| Outcome: | The proposed technique outperforms state-of-the-art methods on the GLUE benchmark and in an out-of domain evaluation. |
LABO: Towards Learning Optimal Label Regularization via Bi-level Optimization (2023.findings-acl)
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| Challenge: | Existing methods for regularizing deep neural networks rely on weight decay, dropout, batch/layer normalization to converge faster and generalize. |
| Approach: | They propose a framework for training with label regularization which includes conventional LS but can also model instance-specific variants. |
| Outcome: | The proposed approach consistently yields better results than conventional regularization on seven machine translation and three image classification tasks while maintaining training efficiency. |
Part-Of-Speech Sensitivity of Routers in Mixture of Experts Models (2025.coling-main)
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| Challenge: | a study examines the behavior of routers in Mixture of Experts (MoE) models . experts with similar linguistic traits are often routed to the same expert regardless of context . |
| Approach: | They investigate how tokens are routed based on their linguistic features . they aim to explore whether experts specialize in processing tokens with similar linguistic traits . |
| Outcome: | The proposed model-integrated routers are based on Mixture of Experts (MoE) models . the results show that expert specialization is high for POS categories . |
Data Selection for Bilingual Lexicon Induction from Specialized Comparable Corpora (2020.coling-main)
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| Challenge: | Narrow specialized comparable corpora are small in size, making it difficult to build efficient models to acquire translation equivalents. |
| Approach: | They propose to use Tf-Idf and cross entropy to improve bilingual lexicon induction from specialized comparable corpora by a factor of 10 . |
| Outcome: | The proposed methods improve bilingual lexicon induction by a large margin. |