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Changtong Zan

3 accepted papers

2025

Self-Evolution Knowledge Distillation for LLM-based Machine Translation

COLING 2025main

Knowledge distillation (KD) has shown great promise in transferring knowledge from larger teacher models to smaller student models. However, existing KD strategies for large language models often minimize output distributions between student and teacher models indiscriminately for each token. This o…

2023

Unsupervised Dense Retrieval with Relevance-Aware Contrastive Pre-Training

ACL 2023findings

Dense retrievers have achieved impressive performance, but their demand for abundant training data limits their application scenarios. Contrastive pre-training, which constructs pseudo-positive examples from unlabeled data, has shown great potential to solve this problem. However, the pseudo-positiv…

2022

On the Complementarity between Pre-Training and Random-Initialization for Resource-Rich Machine Translation

COLING 2022main

Pre-Training (PT) of text representations has been successfully applied to low-resource Neural Machine Translation (NMT). However, it usually fails to achieve notable gains (some- times, even worse) on resource-rich NMT on par with its Random-Initialization (RI) counterpart. We take the first step t…