Publications

2010

Okanohara, Daisuke. Large Scale Machine Learning for Practical Natural Language Procesing. Ph.D. Thesis. The University of Tokyo, March 2010.
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Okanohara, Daisuke, Jun'ichi Tsujii. Learning Combination Features with L1 Regularization. In the NAACL-HLT. pp. 97--100, June 2009. poster.
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Okanohara, Daisuke, Kunihiko Sadakane. A Linear-Time Burrows-Wheeler Transform using Induced Sorting. In the Proc. of SPIRE 16th String Processing and Information Retrieval Symposium. pp. 90--101, Aug 2009.
Sun, Xu, Takuya Matsuzaki, Daisuke Okanohara, Jun'ichi Tsujii. Latent Variable Perceptron Algorithm for Structured Classification. In the Proceedings of International Joint Conferences on Artificial Intelligence (IJCAI). Los Angeles, pp. 1236-1242, 2009.
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Okanohara, Daisuke, Jun'ichi Tsujii. Text Categorization with All Substring Features. In the SIAM International Conference on Data Mining (SDM). pp. 838--846, April 2009.
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Oda, Kanae, Jin-Dong Kim, Tomoko Ohta, Daisuke Okanohara, Takuya Matsuzaki, Yuka Tateisi and Jun'ichi Tsujii. New challenges for text mining: Mapping between text and manually curated pathways. BMC Bioinformatics. 9(Suppl 3). pp. S5, BioMed Central, Apr 2008. ISSN 1471-2105.

Okanohara, Daisuke, Kunihiko Sadakane. An Online Algorithm for Finding the Longest Previous Factors. In the 16th European Symposium on Algorithms. Sep 2008.
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Sun, Xu, Louis-Philippe Morency, Daisuke Okanohara and Jun'ichi Tsujii. Modeling Latent-Dynamic in Shallow Parsing: A Latent Conditional Model with Improved Inference. In the The 22nd International Conference on Computational Linguistics (COLING). 2008.

Okanohara, Daisuke and Kunihiko Sadakane. Practical Entropy-Compressed Rank/Select Dictionary. In the Proceedings of ALENEX 2007. New Orleans, Lousiana, January 2007.
[PDF][PPT]
Okanohara, Daisuke and Jun'ichi Tsujii. A discriminative language model with pseudo-negative samples. In the Proceedings of the 45th Annual Meeting of the Association of Computational Linguistics. pp. 73--80, Association for Computational Linguistics, June 2007. Prague, Czech Republic.

Daisuke, Okanohara, Yusuke Miyao, Yoshimasa Tsuruoka and Jun'ichi Tsujii. Improving the Scalability of Semi-Markov Conditional Random Fields for Named Entity Recognition. In the Proceedings of ACL 2006. Sydney, Australia, July 2006.
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Okanohara, Daisuke and Jun'ichi Tsujii. Assigning Polarity Scores to Reviews Using Machine Learning Techniques. In Robert Dale, Kam-Fai Wong, Jian Su and Oi Yee Kwong (Eds.), Natural Language Processing - IJCNLP 2005. LNCS3651. Jeju Island, Korea, Springer-Verlag, October 2005.
[PDF]

Okanohara, Daisuke. Partially Decodable Compression with Static PPM. In the Data Compression Conference 2005 poster session. Snowbird, UT, USA, March 2005.
[pdf (abstract)]

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