NPRF: A Neural Pseudo Relevance Feedback Framework for Ad-hoc Information Retrieval Canjia Li author Yingfei Sun author Ben He author Le Wang author Kai Hui author Andrew Yates author Le Sun author Jungang Xu author 2018-oct-nov text Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing Ellen Riloff editor David Chiang editor Julia Hockenmaier editor Jun’ichi Tsujii editor Association for Computational Linguistics Brussels, Belgium conference publication li-etal-2018-nprf 10.18653/v1/D18-1478 https://aclanthology.org/D18-1478/ 2018-oct-nov 4482 4491