Papers by Wenzheng Zhang
MinerU2.5: A Decoupled Vision-Language Model for Efficient High-Resolution Document Parsing (2026.acl-industry)
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Junbo Niu, Zheng Liu, Zhuangcheng Gu, Bin Wang, Linke Ouyang, Zhiyuan Zhao, Tao Chu, Tianyao He, Fan Wu, Qintong Zhang, Zhenjiang Jin, Guang Liang, Rui Zhang, Wenzheng Zhang, Yuan Qu, Zhifei Ren, Yuefeng Sun, Zirui Tang, Boyu Niu, Yuanhong Zheng, Dongsheng Ma, Ziyang Miao, Hejun Dong, Siyi Qian, Junyuan Zhang, Fangdong Wang, Jingzhou Chen, Xiaomeng Zhao, Liqun Wei, Wei Li, Shasha Wang, RuiLiang Xu, Yuanyuan Cao, Lu Chen, Qianqian Wu, Huaiyu Gu, Lindong Lu, Dechen Lin, null Shenguanlin, Xuanhe Zhou, Linfeng Zhang, Yuhang Zang, Xiaoyi Dong, Jiaqi Wang, Bo Zhang, Lei Bai, Pei Chu, Weijia Li, Jiang Wu, Lijun Wu, Zhenxiang Li, Guangyu Wang, Zhongying Tu, Chao Xu, Kai Chen, Bowen Zhou, Dahua Lin, Wentao Zhang, Conghui He
| Challenge: | Document images are characterized by higher resolutions, denser content, and more complex structural layouts. |
| Approach: | They propose a 1.2B-parameter document parsing vision-language model that decouples layout analysis from local content recognition. |
| Outcome: | The proposed model surpasses general-purpose and domain-specific models on multiple benchmarks while maintaining significantly lower computational overhead. |
Understanding Hard Negatives in Noise Contrastive Estimation (2021.naacl-main)
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| Challenge: | Existing theoretical results in contrastive learning focus on unconditional negative distributions. |
| Approach: | They propose a method where highest-scoring incorrect labels are chosen as negatives . they also propose 'hard negative mining' where negatives are used as negative examples . |
| Outcome: | The proposed approach achieves strong results on the task of zero-shot entity linking. |
Seq2seq is All You Need for Coreference Resolution (2023.emnlp-main)
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| Challenge: | Existing work on coreference resolution suggests task-specific models are necessary . a recent line of work that take an alternative approach leveraging advances in seq2seq-based models is needed . |
| Approach: | They propose a pretrained seq2seq transformer to map an input document to a tagged sequence encoding the coreference annotation. |
| Outcome: | The proposed model outperforms or matches the best coreference systems on an array of datasets. |
pQuant: Towards Effective Low-Bit Language Models via Decoupled Linear Quantization-Aware Training (2026.findings-acl)
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| Challenge: | Existing methods for building efficient large language models with sub 2-bit weights are lacking in accuracy and scalability. |
| Approach: | They propose a method that decouples parameters by splitting linear layers into two specialized branches. |
| Outcome: | The proposed method achieves state-of-the-art performance in extremely low-bit quantization. |
Synchronous Double-channel Recurrent Network for Aspect-Opinion Pair Extraction (2020.acl-main)
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| Challenge: | Existing studies focus on aspect-opinion relation detection, but neglect to recognize the relations between aspects and opinion expressions. |
| Approach: | They propose a Synchronous Double-channel Recurrent Network to deal with AOPE task . they propose an opinion entity extraction unit, a relation detection unit, and a synchronization unit . |
| Outcome: | The proposed system achieves state-of-the-art in opinion entity extraction . it is based on three datasets based upon SemEval 2014 and 2015 benchmarks . |
Improving Multitask Retrieval by Promoting Task Specialization (2023.tacl-1)
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| Challenge: | despite its practical appeal, naive multitask retrieval lags behind task-specific retrieval. |
| Approach: | They propose to train a multitask retriever that promotes task specialization . the model is highly performant on the KILT benchmark . |
| Outcome: | The proposed model outperforms task-specific retrievals on the KILT benchmark . it learns parameters that are more task-specialized than naive retrieval without prompting or adaptive learning. |
ImpRAG: Retrieval-Augmented Generation with Implicit Queries (2025.findings-emnlp)
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| Challenge: | Retrieval-Augmented Generation (RAG) systems treat retrieval and generation as separate processes, requiring explicit textual queries to connect them. |
| Approach: | They propose a query-free RAG system that integrates retrieval and generation into a unified model. |
| Outcome: | The proposed system can achieve 3.6-11.5 accuracy improvements on unseen tasks . it allows models to express their information needs without human-specified queries . |
Hiring Now: A Skill-Aware Multi-Attention Model for Job Posting Generation (2020.acl-main)
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| Challenge: | Creating job requirements is a crucial step in the recruiting process, but it is difficult to specify the level of education, experience, relevant skills per the job description. |
| Approach: | They propose a conditional text generation task to generate job requirements based on job descriptions . they use a hierarchical decoder to label the job description with multiple skills . a skill knowledge graph is constructed to capture the global prior knowledge about skills based upon the model . |
| Outcome: | The proposed method is evaluated on real-world job posting data. |