Search Results for author: Arnold Overwijk

Found 7 papers, 6 papers with code

ClueWeb22: 10 Billion Web Documents with Visual and Semantic Information

no code implementations29 Nov 2022 Arnold Overwijk, Chenyan Xiong, Xiao Liu, Cameron VandenBerg, Jamie Callan

ClueWeb22, the newest iteration of the ClueWeb line of datasets, provides 10 billion web pages affiliated with rich information.


Reduce Catastrophic Forgetting of Dense Retrieval Training with Teleportation Negatives

1 code implementation31 Oct 2022 Si Sun, Chenyan Xiong, Yue Yu, Arnold Overwijk, Zhiyuan Liu, Jie Bao

In this paper, we investigate the instability in the standard dense retrieval training, which iterates between model training and hard negative selection using the being-trained model.


COCO-DR: Combating Distribution Shifts in Zero-Shot Dense Retrieval with Contrastive and Distributionally Robust Learning

1 code implementation27 Oct 2022 Yue Yu, Chenyan Xiong, Si Sun, Chao Zhang, Arnold Overwijk

We present a new zero-shot dense retrieval (ZeroDR) method, COCO-DR, to improve the generalization ability of dense retrieval by combating the distribution shifts between source training tasks and target scenarios.

Language Modelling Retrieval

Approximate Nearest Neighbor Negative Contrastive Learning for Dense Text Retrieval

4 code implementations ICLR 2021 Lee Xiong, Chenyan Xiong, Ye Li, Kwok-Fung Tang, Jialin Liu, Paul Bennett, Junaid Ahmed, Arnold Overwijk

In this paper, we identify that the main bottleneck is in the training mechanisms, where the negative instances used in training are not representative of the irrelevant documents in testing.

Contrastive Learning Passage Retrieval +3

Open Domain Web Keyphrase Extraction Beyond Language Modeling

2 code implementations IJCNLP 2019 Lee Xiong, Chuan Hu, Chenyan Xiong, Daniel Campos, Arnold Overwijk

This paper studies keyphrase extraction in real-world scenarios where documents are from diverse domains and have variant content quality.

Keyphrase Extraction Language Modelling

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