Unpaired Sentiment-to-Sentiment Translation: A Cycled Reinforcement Learning Approach (P18-1)
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| Challenge: | Existing studies for sentiment-to-sentiment "translation" only change the underlying sentiment and fail to keep the semantic content. |
| Approach: | They propose a cycled reinforcement learning method that combines neutralization module and emotionalization module. |
| Outcome: | The proposed method outperforms state-of-the-art systems on Yelp and Amazon review datasets. |
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Learning Sentiment Memories for Sentiment Modification without Parallel Data (D18-1)
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| Challenge: | Existing methods for sentiment modification generate input-irrelevant texts due to lack of parallel data. |
| Approach: | They propose a method that automatically extracts appropriate sentiment information from learned sentiment memories according to the specific context. |
| Outcome: | The proposed method significantly improves the content preservation degree and achieves the state-of-the-art performance. |
Specificity-Driven Cascading Approach for Unsupervised Sentiment Modification (D19-1)
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| Challenge: | Existing methods for unsupervised sentiment modification lack specific information in text generated without parallel data . specificity-driven cascading approach can improve specificity of generated text and content preservation . |
| Approach: | They propose a specificity-driven cascading approach for unsupervised sentiment modification . the method performs target sentiment addition and content reconstruction independently . |
| Outcome: | The proposed method outperforms competitive systems by a large margin on Yelp and Amazon datasets. |
Learning to Flip the Sentiment of Reviews from Non-Parallel Corpora (D19-1)
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| Challenge: | Existing methods for flipping sentiment are costly and require parallel data. |
| Approach: | They propose a method for acquiring imperfectly aligned sentences from non-parallel corpora and propose 'sensational' model that learns to minimize sentiment and content losses in a fully end-to-end manner. |
| Outcome: | The proposed model offers well-balanced results across Yelp restaurant and Amazon product reviews. |
Towards Fine-grained Text Sentiment Transfer (P19-1)
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| Challenge: | Existing methods for fine-grained text sentiment transfer only reverse the sentiment polarity of text, but they lack a robust and parallel learning algorithm. |
| Approach: | They propose a novel fine-grained text sentiment transfer task that revises a sequence to satisfy a given sentiment intensity while preserving the original semantic content. |
| Outcome: | The proposed model outperforms existing methods by a large margin in automatic evaluation and human evaluation. |
Machine Translation for Machines: the Sentiment Classification Use Case (D19-1)
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| Challenge: | Traditionally, machine translation (MT) pursues a "human-oriented" objective: generating fluent output for a downstream task. |
| Approach: | They propose a neural machine translation approach that uses weak feedback to generate translations that are best suited for a downstream task. |
| Outcome: | The proposed approach outperforms general-purpose models and reinforcement learning methods on German and Italian tweets. |
Breaking Consensus Bias: Unsupervised Reinforcement Learning for Machine Translation (2026.findings-acl)
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| Challenge: | Existing RL approaches for MT face fixed references or the production of homogeneous references leading to mode collapse in unsupervised settings. |
| Approach: | They propose an Entropy-Driven Unsupervised RL framework for machine translation that leverages entropy for supervision construction and self-evolution. |
| Outcome: | The proposed framework outperforms supervised and unsupervised baselines in multiple language pairs. |
IMaT: Unsupervised Text Attribute Transfer via Iterative Matching and Translation (D19-1)
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| Challenge: | Existing approaches to rewrite sentences with certain attributes are difficult and often result in poor content-preservation and ungrammaticality. |
| Approach: | They propose a method that uses a sequence-to-sequence model to learn attribute transfer . existing approaches try to explicitly disentangle content and attribute information . |
| Outcome: | The proposed method outperforms complex state-of-the-art systems by a large margin in sentiment modification and formality transfer tasks. |
Better Chinese Sentence Segmentation with Reinforcement Learning (2021.findings-acl)
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| Challenge: | Chinese-English machine translation systems use ambiguous sentence boundaries, but English and Chinese use different orthographic conventions to designate sentence boundaries. |
| Approach: | They propose a segmentation policy that splits Chinese texts into segments that can be independently translated to maximise translation quality. |
| Outcome: | The proposed method improves the baseline BLEU score on the Chinese-English news translation task by +0.3 BLUE overall and the score on input segments that contain more than 60 words by +3 BL EU. |
From Disjoint Sets to Parallel Data to Train Seq2Seq Models for Sentiment Transfer (2020.findings-emnlp)
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| Challenge: | Existing methods for sentiment transfer have relied on unsupervised methods due to lack of parallel corpora. |
| Approach: | They propose a method for creating parallel data to train Seq2Seq neural networks for sentiment transfer. |
| Outcome: | The proposed method outperforms existing unsupervised methods in sentiment transfer tasks. |
Revisiting Adversarial Autoencoder for Unsupervised Word Translation with Cycle Consistency and Improved Training (N19-1)
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| Challenge: | Recent work has shown superior performance for non-adversarial methods in more challenging language pairs. |
| Approach: | They propose to use adversarial autoencoder to map monolingual embeddings to a shared space and to put the target encoders as an adversary against the corresponding discriminator. |
| Outcome: | The proposed method is more robust and achieves better performance than previously proposed adversarial and non-adversarial methods. |