CIR at the NTCIR-17 ULTRE-2 Task

no code implementations • 18 Oct 2023 • Lulu Yu, Keping Bi, Jiafeng Guo, Xueqi Cheng

The Chinese academy of sciences Information Retrieval team (CIR) has participated in the NTCIR-17 ULTRE-2 task.

Information Retrieval Position +1

Ensemble Ranking Model with Multiple Pretraining Strategies for Web Search

no code implementations • 18 Feb 2023 • Xiaojie Sun, Lulu Yu, Yiting Wang, Keping Bi, Jiafeng Guo

Then we fine-tune several pre-trained models and train an ensemble model to aggregate all the predictions from various pre-trained models with human-annotation data in the fine-tuning stage.

Learning-To-Rank

Feature-Enhanced Network with Hybrid Debiasing Strategies for Unbiased Learning to Rank

no code implementations • 15 Feb 2023 • Lulu Yu, Yiting Wang, Xiaojie Sun, Keping Bi, Jiafeng Guo

Unbiased learning to rank (ULTR) aims to mitigate various biases existing in user clicks, such as position bias, trust bias, presentation bias, and learn an effective ranker.

Learning-To-Rank