Evaluating Topic Difficulties from the Viewpoint of Query Term Expansion.

@inproceedings{yoshioka-2006-evaluating, author = {Masaharu Yoshioka}, editor = {Hwee Tou Ng and Mun-Kew Leong and Min-Yen Kan and Donghong Ji}, title = {{Evaluating Topic Difficulties from the Viewpoint of Query Term Expansion}}, booktitle = {{Information Retrieval Technology, Third Asia Information Retrieval Symposium, AIRS 2006, Singapore, October 16-18, 2006, Proceedings}}, series = {Lecture Notes in Computer Science}, volume = {4182}, pages = {390--403}, publisher = {Springer}, year = {2006}, url = {https://doi.org/10.1007/11880592_30}, doi = {https://doi.org/10.1007/11880592_30} }