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

Yue Yu | Chenyan Xiong | Si Sun | Chao Zhang | Arnold Overwijk |

Reduce Catastrophic Forgetting of Dense Retrieval Training with Teleportation Negatives EMNLP

Si Sun | Chenyan Xiong | Yue Yu | Arnold Overwijk | Zhiyuan Liu | Jie Bao |

Less is More: Pretrain a Strong Siamese Encoder for Dense Text Retrieval Using a Weak Decoder EMNLP

Shuqi Lu | Di He | Chenyan Xiong | Guolin Ke | Waleed Malik | Zhicheng Dou | Paul Bennett | Tie-Yan Liu | Arnold Overwijk |

Open Domain Web Keyphrase Extraction Beyond Language Modeling EMNLP

Lee Xiong | Chuan Hu | Chenyan Xiong | Daniel Campos | Arnold Overwijk |