The UTIRL team participated in both Offline and Online unbiased learning-to-rank (ULTR) (Chinese) subtasks of the NTCIR-16 ULTRE Task. This paper describes our implemented algorithms and analysis the official results. In the Offline ULTR subtask, we tried a newly proposed ULTR algorithm and an ensemble of ten models consisting of five different algorithms on two neural networks. In the Online ULTR subtask, we used three algorithms trained on a deep neural network.
TRAN et al. (Tue,) studied this question.