Learning similarity function for rare queries.

@inproceedings{xu-2011-learning, author = {Jingfang Xu and Gu Xu}, editor = {Irwin King and Wolfgang Nejdl and Hang Li}, title = {{Learning similarity function for rare queries}}, booktitle = {{Proceedings of the Forth International Conference on Web Search and Web Data Mining, WSDM 2011, Hong Kong, China, February 9-12, 2011}}, pages = {615--624}, publisher = {ACM}, year = {2011}, url = {https://doi.org/10.1145/1935826.1935912}, doi = {https://doi.org/10.1145/1935826.1935912} }