Enhanced Representation with Contrastive Loss for Long-Tail Query Classification in e-commerce Lvxing Zhu author Hao Chen author Chao Wei author Weiru Zhang author 2022-05 text Proceedings of the Fifth Workshop on e-Commerce and NLP (ECNLP 5) Shervin Malmasi editor Oleg Rokhlenko editor Nicola Ueffing editor Ido Guy editor Eugene Agichtein editor Surya Kallumadi editor Association for Computational Linguistics Dublin, Ireland conference publication zhu-etal-2022-enhanced 10.18653/v1/2022.ecnlp-1.17 https://aclanthology.org/2022.ecnlp-1.17/ 2022-05 141 150