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Tianchi Yang

6 accepted papers

2025

Context-DPO: Aligning Language Models for Context-Faithfulness

ACL 2025finding

Reliable responses from large language models (LLMs) require adherence to user instructions and retrieved information. While alignment techniques help LLMs align with human intentions and values, improving context-faithfulness through alignment remains underexplored. To address this, we propose Cont…

2024

Calibrating LLM-Based Evaluator

COLING 2024main

Recent advancements in large language models (LLMs) and their emergent capabilities make LLM a promising reference-free evaluator on the quality of natural language generation, and a competent alternative to human evaluation. However, hindered by the closed-source or high computational demand to hos…

Cited by 73SourcePDFScholar
2024

HD-Eval: Aligning Large Language Model Evaluators Through Hierarchical Criteria Decomposition

ACL 2024long

Large language models (LLMs) have emerged as a promising alternative to expensive human evaluations. However, the alignment and coverage of LLM-based evaluations are often limited by the scope and potential bias of the evaluation prompts and criteria. To address this challenge, we propose HD-Eval, a…

2024

Text Diffusion with Reinforced Conditioning

AAAI 2024technical

Diffusion models have demonstrated exceptional capability in generating high-quality images, videos, and audio. Due to their adaptiveness in iterative refinement, they provide a strong potential for achieving better non-autoregressive sequence generation. However, existing text diffusion models stil…

Cited by 1SourcePDFScholar
2023

Auto Search Indexer for End-to-End Document Retrieval

EMNLP 2023long findings

Generative retrieval, which is a new advanced paradigm for document retrieval, has recently attracted research interests, since it encodes all documents into the model and directly generates the retrieved documents. However, its power is still underutilized since it heavily relies on the ``preproces…

Cited by 0SourceScholar
2021

Compare to The Knowledge: Graph Neural Fake News Detection with External Knowledge

ACL 2021long

Nowadays, fake news detection, which aims to verify whether a news document is trusted or fake, has become urgent and important. Most existing methods rely heavily on linguistic and semantic features from the news content, and fail to effectively exploit external knowledge which could help determine…