Papers by Dhananjay Ram
DEM: Distribution Edited Model for Training with Mixed Data Distributions (2024.emnlp-main)
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| Challenge: | Recent fine-tuning approaches for large language models require supervised finetun on diverse datasets and follow different distributions. |
| Approach: | They propose a distribution edited model that integrates models individually trained on each data source with the base model using basic element-wise vector operations. |
| Outcome: | The proposed model outperforms baseline models on a variety of benchmarks and is cheaper than standard data mixing methods. |
Efficient Long-Range Transformers: You Need to Attend More, but Not Necessarily at Every Layer (2023.findings-emnlp)
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| Challenge: | Pretrained transformer models have demonstrated remarkable performance across various natural language processing tasks. |
| Approach: | They propose a transformer variant with mixed attention spans that leverages the attention mechanism to capture long- and short-range dependencies in the sequence. |
| Outcome: | The proposed model can achieve competitive performance to models with full attention while reducing computational cost (75%) |
Sequence-level Large Language Model Training with Contrastive Preference Optimization (2025.findings-naacl)
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| Challenge: | a new method to improve the performance of large language models requires a small computational cost. |
| Approach: | They propose a CPO procedure that can inject sequence-level information into the model at any training stage without expensive human labeled data. |
| Outcome: | The proposed objective surpasses the next token prediction in terms of win rate in instruction-following and text generation tasks. |
Self-Attentive Residual Decoder for Neural Machine Translation (N18-1)
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| Challenge: | Neural sequence-to-sequence networks with attention have been used for machine translation . however, the target-side context is limited and the model lacks the ability to capture non-syntactic dependencies among words. |
| Approach: | They propose a sequence-to-sequence network with attention that captures contextual information at each time-step prediction through an attention mechanism. |
| Outcome: | The proposed model outperforms a neural MT baseline and memory and self-attention network on three language pairs. |
Document-Level Neural Machine Translation with Hierarchical Attention Networks (D18-1)
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| Challenge: | Neural machine translation (NMT) can be improved by including document-level contextual information. |
| Approach: | They propose a hierarchical attention model that captures document-level contextual information and conditioning on the NMT model’s own hidden states. |
| Outcome: | The proposed model improves the BLEU score over a strong NMT baseline with the state-of-the-art in context-aware methods and that both the encoder and decoder benefit from context in complementary ways. |