Using Error-Correcting Output Codes with Model-Refinement to Boost Centroid Text Classifier Songbo Tan author 2007-06 text Proceedings of the 45th Annual Meeting of the Association for Computational Linguistics Companion Volume Proceedings of the Demo and Poster Sessions Sophia Ananiadou editor Association for Computational Linguistics Prague, Czech Republic conference publication tan-2007-using https://aclanthology.org/P07-2021/ 2007-06 81 84