Improve retrieval accuracy for difficult queries using negative feedback.

@inproceedings{wang-2007-improve, author = {Xuanhui Wang and Hui Fang and ChengXiang Zhai}, editor = {M\'{a}rio J. Silva and Alberto H. F. Laender and Ricardo Baeza-Yates and Deborah L. McGuinness and Bj{\o}rn Olstad and {\O}ystein Haug Olsen and Andr\'{e} O. Falc\~{a}o}, title = {{Improve retrieval accuracy for difficult queries using negative feedback}}, booktitle = {{Proceedings of the Sixteenth ACM Conference on Information and Knowledge Management, CIKM 2007, Lisbon, Portugal, November 6-10, 2007}}, pages = {991--994}, publisher = {ACM}, year = {2007}, url = {https://doi.org/10.1145/1321440.1321593}, doi = {https://doi.org/10.1145/1321440.1321593} }