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Guangwei Xu

14 accepted papers

2025

Frozen Language Models Are Gradient Coherence Rectifiers in Vision Transformers

AAAI 2025technical

Large language models (LLMs) have demonstrated remarkable performance in multimodal tasks even with frozen LLM Block and only a few trainable parameters. However, the underlying mechanisms of how LLMs enhance multimodal performance remains unclear. In this work, we focus on the phenomenon that ``Mer…

Cited by 0SourcePDFScholar
2025

VimoRAG: Video-based Retrieval-augmented 3D Motion Generation for Motion Language Models

NeurIPS 2025poster

This paper introduces **VimoRAG**, a novel video-based retrieval-augmented motion generation framework for motion large language models (LLMs). As motion LLMs face severe out-of-domain/out-of-vocabulary issues due to limited annotated data, **VimoRAG** leverages large-scale in-the-wild video databa…

Cited by 0SourceScholar
2025

Youku Dense Caption: A Large-scale Chinese Video Dense Caption Dataset and Benchmarks

ICLR 2025poster

With the explosive growth of video content, video captions have emerged as a crucial tool for video comprehension, significantly enhancing the ability to understand and retrieve information from videos. However, most publicly available dense video captioning datasets are in English, resulting in a s…

Cited by 0SourcePDFScholar
2022

AISHELL-NER: Named Entity Recognition from Chinese Speech

ICASSP 2022accepted

Named Entity Recognition (NER) from speech is among Spoken Language Understanding (SLU) tasks, aiming to extract semantic information from the speech signal. NER from speech is usually made through a two-step pipeline that consists of (1) processing the audio using an Automatic Speech Recognition (A…

Cited by 0SourceScholar
2022

Identifying Chinese Opinion Expressions with Extremely-Noisy Crowdsourcing Annotations

ACL 2022long

Recent works of opinion expression identification (OEI) rely heavily on the quality and scale of the manually-constructed training corpus, which could be extremely difficult to satisfy. Crowdsourcing is one practical solution for this problem, aiming to create a large-scale but quality-unguaranteed…

2022

Parallel Instance Query Network for Named Entity Recognition

ACL 2022long

Named entity recognition (NER) is a fundamental task in natural language processing. Recent works treat named entity recognition as a reading comprehension task, constructing type-specific queries manually to extract entities. This paradigm suffers from three issues. First, type-specific queries can…

2022

Prompt-learning for Fine-grained Entity Typing

EMNLP 2022finding

As an effective approach to adapting pre-trained language models (PLMs) for specific tasks, prompt-learning has recently attracted much attention from researchers. By using cloze-style language prompts to stimulate the versatile knowledge of PLMs, prompt-learning can achieve promising results on a s…

Cited by 172SourcePDFScholar
2022

Robust Self-Augmentation for Named Entity Recognition with Meta Reweighting

NAACL 2022long

Self-augmentation has received increasing research interest recently to improve named entity recognition (NER) performance in low-resource scenarios. Token substitution and mixup are two feasible heterogeneous self-augmentation techniques for NER that can achieve effective performance with certain s…

2021

A Fine-Grained Domain Adaption Model for Joint Word Segmentation and POS Tagging

EMNLP 2021main

Domain adaption for word segmentation and POS tagging is a challenging problem for Chinese lexical processing. Self-training is one promising solution for it, which struggles to construct a set of high-quality pseudo training instances for the target domain. Previous work usually assumes a universal…

2021

Crowdsourcing Learning as Domain Adaptation: A Case Study on Named Entity Recognition

ACL 2021long

Crowdsourcing is regarded as one prospective solution for effective supervised learning, aiming to build large-scale annotated training data by crowd workers. Previous studies focus on reducing the influences from the noises of the crowdsourced annotations for supervised models. We take a different…

2021

Few-NERD: A Few-shot Named Entity Recognition Dataset

ACL 2021long

Recently, considerable literature has grown up around the theme of few-shot named entity recognition (NER), but little published benchmark data specifically focused on the practical and challenging task. Current approaches collect existing supervised NER datasets and re-organize them to the few-shot…

2021

Probing BERT in Hyperbolic Spaces

ICLR 2021poster

Recently, a variety of probing tasks are proposed to discover linguistic properties learned in contextualized word embeddings. Many of these works implicitly assume these embeddings lay in certain metric spaces, typically the Euclidean space. This work considers a family of geometrically special spa…

2021

Prototypical Representation Learning for Relation Extraction

ICLR 2021poster

Recognizing relations between entities is a pivotal task of relational learning. Learning relation representations from distantly-labeled datasets is difficult because of the abundant label noise and complicated expressions in human language. This paper aims to learn predictive, interpretable, a…

2020

Learning with Noise: Improving Distantly-Supervised Fine-grained Entity Typing via Automatic Relabeling

IJCAI 2020poster

Fine-grained entity typing (FET) is a fundamental task for various entity-leveraging applications. Although great success has been made, existing systems still have challenges in handling noisy samples in training data introduced by distant supervision methods. To address these noise, previous studi…

Cited by 0SourcePDFScholar