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Zexuan Qiu

6 accepted papers

2025

Entropy-Based Decoding for Retrieval-Augmented Large Language Models

NAACL 2025long

Augmenting Large Language Models (LLMs) with retrieved external knowledge has proven effective in improving the factual accuracy of generated responses. Despite their success, retrieval-augmented LLMs still face the distractibility issue, where the generated responses are negatively influenced by no…

Cited by 2SourcePDFScholar
2024

CLongEval: A Chinese Benchmark for Evaluating Long-Context Large Language Models

EMNLP 2024finding

Developing Large Language Models (LLMs) with robust long-context capabilities has been the recent research focus, resulting in the emergence of long-context LLMs proficient in Chinese. However, the evaluation of these models remains underdeveloped due to a lack of benchmarks. To address this gap, we…

2024

HiHPQ: Hierarchical Hyperbolic Product Quantization for Unsupervised Image Retrieval

AAAI 2024technical

Existing unsupervised deep product quantization methods primarily aim for the increased similarity between different views of the identical image, whereas the delicate multi-level semantic similarities preserved between images are overlooked. Moreover, these methods predominantly focus on the Euclid…

2023

Learning Summary-Worthy Visual Representation for Abstractive Summarization in Video

IJCAI 2023poster

Multimodal abstractive summarization for videos (MAS) requires generating a concise textual summary to describe the highlights of a video according to multimodal resources, in our case, the video content and its transcript. Inspired by the success of the large-scale generative pre-trained language m…

Cited by 3SourcePDFScholar
2022

Efficient Document Retrieval by End-to-End Refining and Quantizing BERT Embedding with Contrastive Product Quantization

EMNLP 2022main

Efficient document retrieval heavily relies on the technique of semantic hashing, which learns a binary code for every document and employs Hamming distance to evaluate document distances. However, existing semantic hashing methods are mostly established on outdated TFIDF features, which obviously d…

2021

Unsupervised Hashing with Contrastive Information Bottleneck

IJCAI 2021poster

Many unsupervised hashing methods are implicitly established on the idea of reconstructing the input data, which basically encourages the hashing codes to retain as much information of original data as possible. However, this requirement may force the models spending lots of their effort on reconstr…