Search Results for author: Fangchao Liu

Found 6 papers, 4 papers with code

Towards a Unified Language Model for Knowledge-Intensive Tasks Utilizing External Corpus

no code implementations2 Feb 2024 Xiaoxi Li, Zhicheng Dou, Yujia Zhou, Fangchao Liu

Through generative retrieval (GR) approach, language models can achieve superior retrieval performance by directly generating relevant document identifiers (DocIDs).

Language Modelling Retrieval

Generative Retrieval via Term Set Generation

1 code implementation23 May 2023 Peitian Zhang, Zheng Liu, Yujia Zhou, Zhicheng Dou, Fangchao Liu, Zhao Cao

On top of the term-set DocID, we propose a permutation-invariant decoding algorithm, with which the term set can be generated in any permutation yet will always lead to the corresponding document.

Information Retrieval Natural Questions +1

Pre-training to Match for Unified Low-shot Relation Extraction

1 code implementation ACL 2022 Fangchao Liu, Hongyu Lin, Xianpei Han, Boxi Cao, Le Sun

Low-shot relation extraction~(RE) aims to recognize novel relations with very few or even no samples, which is critical in real scenario application.

Meta-Learning Relation +1

Can Prompt Probe Pretrained Language Models? Understanding the Invisible Risks from a Causal View

1 code implementation ACL 2022 Boxi Cao, Hongyu Lin, Xianpei Han, Fangchao Liu, Le Sun

Prompt-based probing has been widely used in evaluating the abilities of pretrained language models (PLMs).

Element Intervention for Open Relation Extraction

no code implementations ACL 2021 Fangchao Liu, Lingyong Yan, Hongyu Lin, Xianpei Han, Le Sun

Open relation extraction aims to cluster relation instances referring to the same underlying relation, which is a critical step for general relation extraction.

Relation Relation Extraction

From Bag of Sentences to Document: Distantly Supervised Relation Extraction via Machine Reading Comprehension

1 code implementation8 Dec 2020 Lingyong Yan, Xianpei Han, Le Sun, Fangchao Liu, Ning Bian

By re-organizing all sentences about an entity as a document and extracting relations via querying the document with relation-specific questions, the document-based DS paradigm can simultaneously encode and exploit all sentence-level, inter-sentence-level, and entity-level evidence.

Denoising Machine Reading Comprehension +3

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