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Zetian Sun

9 accepted papers

2026

Improving Value-based Process Verifier via Low-Cost Variance Reduction

AAAI 2026technical

Large language models (LLMs) have achieved remarkable success in a wide range of tasks. However, their reasoning capabilities, particularly in complex domains like mathematics, remain a significant challenge. Value-based process verifiers, which estimate the probability of a partial reasoning chain

Cited by 0SourcePDFScholar
2026

Is On-Policy Data always the Best Choice for Direct Preference Optimization-Based LM Alignment?

ICLR 2026poster

The alignment of language models (LMs) with human preferences is critical for building reliable AI systems. The problem is typically framed as optimizing an LM policy to maximize the expected reward that reflects human preferences. Recently, Direct Preference Optimization (DPO) was proposed as a LM…

Cited by 0SourceScholar
2026

KaLM-Embedding-V2: Superior Training Techniques and Data Inspire A Versatile Embedding Model

ICLR 2026poster

Recent advancements in Large Language Models (LLMs)-based text embedding models primarily focus on data scaling or synthesis, yet limited exploration of training techniques and data quality, thereby constraining performance. In this work, we propose KaLM-Embedding-V2, a series of versatile and compa…

Cited by 0SourcecodeScholar
2025

CMT: A Memory Compression Method for Continual Knowledge Learning of Large Language Models

AAAI 2025technical

Large Language Models (LLMs) need to adapt to the continuous changes in data, tasks, and user preferences. Due to their massive size and the high costs associated with training, LLMs are not suitable for frequent retraining. However, updates are necessary to keep them in sync with rapidly evolving h…

Cited by 1SourcePDFScholar
2025

FunnelRAG: A Coarse-to-Fine Progressive Retrieval Paradigm for RAG

NAACL 2025findings

Retrieval-Augmented Generation (RAG) prevails in Large Language Models. It mainly consists of retrieval and generation. The retrieval modules (a.k.a. retrievers) aim to find useful information used to facilitate the generation modules (a.k.a. generators). As such, generators’ performance largely dep…

2024

Improving Attributed Text Generation of Large Language Models via Preference Learning

ACL 2024findings

Large language models have been widely adopted in natural language processing, yet they face the challenge of generating unreliable content. Recent works aim to reduce misinformation and hallucinations by resorting to attribution as a means to provide evidence (i.e., citations). However, current att…

Cited by 9SourcePDFScholar
2024

In-Context Learning State Vector with Inner and Momentum Optimization

NeurIPS 2024poster

Large Language Models (LLMs) have exhibited an impressive ability to perform In-Context Learning (ICL) from only a few examples. Recent works have indicated that the functions learned by ICL can be represented through compressed vectors derived from the transformer. However, the working mechanisms a…

2024

TruthReader: Towards Trustworthy Document Assistant Chatbot with Reliable Attribution

EMNLP 2024system demonstrations

Document assistant chatbots are empowered with extensive capabilities by Large Language Models (LLMs) and have exhibited significant advancements. However, these systems may suffer from hallucinations that are difficult to verify in the context of given documents.Moreover, despite the emergence of p…

2023

HITSZ TMG at ICASSP 2023 SPGC Shared Task: Leveraging Pre-Training and Distillation Method for Title Generation with Limited Resource

ICASSP 2023accepted

In this paper, we present our proposed method for the shared task of the ICASSP 2023 Signal Processing Grand Challenge (SPGC). We participate in Topic Title Generation (TTG), Track 3 of General Meeting Understanding and Generation (MUG) [1] in SPGC. The primary objective of this task is to generate…

Cited by 0SourceScholar