吉永 直樹 / Naoki Yoshinaga, PhD
For prospective students: e-mails from free webmails (e.g., Gmail) will be automatically regarded as spams, while stereotypical (general-purpose) applications that will fit to other laboratories can be manually ignored. We can rarely accept students who
- wish to enter PhD program without having research experiences at research-oriented master's program in NLP/CL-related fields, since such students were likely to take more than five years to complete PhD; please consider our research-oriented 2-year master program instead.
- wish to stay less than a half year as intern without any concrete research plan. It's just too short to set up a task by themselves in academia. If you just want to enjoy fancy technology (e.g., deep learning) using existing NLP tasks as benchmark, you may want to consider applying to other laboratories or industry interns. Research requires time.
We yet accept a wide range of students who want to take master's program (or research students preparing for the exam); we cannot reply to most of applications since there are so many requests possibly due to the recent annoying AI boom, though.
If you want to join our laboratories as master or doctor students, we recommend you to visit us (Ew-503) when UTokyo Komaba Research Campus Open House is held (on 31st May and 1st June, 2019).
Curriculum Vitae
| 2016 - present: | Associate Professor at Institute of Industrial Science, University of Tokyo |
| 2014 - 2016: | Senior Researcher at National Institute of Information and Communications Technology (NICT) |
| 2012 - 2016: | Project Associate Professor at Institute of Industrial Science, University of Tokyo |
| 2008 - 2012: | Project Assistant Professor at Institute of Industrial Science, University of Tokyo |
| 2002 - 2008: | Research Fellow of the Japan Society for the Promotion of Science (JSPS) (DC1, PD) (11.6%, 10.0% accepted, respectively) |
| 2002 - 2005: | Ph.D. in Department of Computer Science, Graduate School of Information Science and Technology, University of Tokyo |
| 2000 - 2002: | M.Sc. in Department of Information Science, Graduate School of Science, University of Tokyo |
| 1996 - 2000: | B.Sc. in Department of Information Science, Faculty of Science, University of Tokyo |
Full CV
Research Interests
We're studying various aspects on natural language processinga (NLP) and computational linguistics (CL), especially
- Efficient algorithms and data structures for NLP [EMNLP-09, ACL-10, COLING-10, COLING-14]
- NLP in the wild; condiering non-textual factors [IJCNLP-13, ACL-13, ACL-17 SRW, NAACL-19]
- NLP for breaking language barriers [CoNLL-15, ACL-17, NAACL-19]
- Mining from time-series social-media text [EMNLP-12, IJCAI-16, IJCAI-19]
- Information visualization for NLP [PacificVis-11, IUI-16, PacificVis-18]
I like to design novel and important NLP tasks [EMNLP-12, ACL-13, COLING-14, IJCAI-16], rather than solving classic tasks on worn-out datasets.
Research Grants
- Grant-in-Aid for Scientific Research (B) (16H02905; 2016-2019): 17,810,000 JPY (as a collaborative researcher; Principal Investigator: Masashi Toyoda)
- U-Tokyo Excellent Young Researchers Start-up (2016-2018): 6,000,000 JPY
- Grant-in-Aid for Young Scientists (B) (16K16109; 2016-2018): 3,900,000 JPY
- IIS Sentei Kenkyuu (2016-2017): 2,000,000 JPY
- Grant-in-Aid for JSPS Fellows (2005-2008): 3,400,000 JPY
- Grant-in-Aid for JSPS Fellows (2002-2005): 3,000,000 JPY
Softwares for NLP/CL
- opal: A scalable kernel-based online learner (polynomial kernel is supported).
- pecco: An efficient classifier for a model pre-trained with conjunctive features (or polynomial kernel).
- cedar: An efficient, updatable trie implementation based on double array.
- yakmo: A robust, efficient alternative k-means clustering.
- J.DepP: Very fast dependency parsers with the state-of-the-art accuracy for Japanese.
- RenTAL (no longer maintained): A grammar compiler from Lexicalized TAG to HPSG-style grammar.
Note that some of the above softwares are no longer
experimental codes; they are substantially elaborated from
the original codes to have a better performance (2-5x speed-up, or +1%
in accuracy etc.; track History section of each software). Those who want to reproduce the experimental results
may want to use the oldest release of the softwares.
Selected Refereed Publications
- Early Discovery of Emerging Entities in Microblogs. Joint work with S. Akasaki and M. Toyoda. IJCAI-19 (accepted, acceptance rate: 13.7%).
- Learning to Describe Unknown Phrases with Local and Global Contexts. Joint work with S. Ishiwatari, H. Hayashi, G. Neubig, S. Sato, M. Toyoda, and M. Kitsuregawa. NAACL-19 (long, oral; acceptance rate 26%).
- Modeling Personal Biases in Language Use by Inducing Personalized Word Embeddings. Joint work with D. Oba, S. Sato, S, Akasaki, and M. Toyoda. NAACL-19 (short, oral; acceptance rate 21%).
- Information Integrated Visualization System for Heavy Rainfall Risk Analysis. Joint work with M. Itoh, T. Sagara, U. Suzuki, K. Umemoto, M. Toyoda, K. Zettsu, and Y. Kidawara. PacificViz-18 (poster).
- Modeling Situations in Neural Chat Bots. Joint work with S. Sato, M. Toyoda and M. Kitsuregawa. ACL-17 SRW (acceptance rate 36%).
- Chunk-based Decoder for Neural Machine Translation. Joint work with S. Ishiwatari, J. Yao, S. Liu, M. Li, M. Zhou, M. Kitsuregawa and W. Jia. ACL-17 (long; acceptance rate 26%).
- Ordering Concepts Based on Common Attribute Intensity. Joint work with T. Iwanari, N. Kaji, T. Nishina, M. Toyoda and M. Kitsuregawa. IJCAI-16 (acceptance rate <25%) [software & dataset]; a follow-up paper at COLING-16 (demo) [software & dataset]
- Spatio-temporal Event Visualization from a Geo-parsed Microblog Stream. Joint work with M. Itoh and M. Toyoda. IUI-16 (poster, acceptance rate 48%)
- Accurate Cross-lingual Projection between Count-based Word Vectors by Exploiting Translatable Context Pairs. Joint work with S. Ishiwatari, N. Kaji, M. Toyoda and M. Kitsuregawa. CoNLL-15. (acceptance rate <30%)
- A Self-adaptive Classifier for Efficient Text-stream Processing. Joint work with M. Kitsuregawa. COLING-14. (acceptance rate 32%) [software]
- Modeling User Leniency and Product Popularity for Sentiment Classification. Joint work with W. Gao, N. Kaji, and M. Kitsuregawa. IJCNLP-13 (poster). (journal ver.)
- Predicting and Eliciting Addressee's Emotion in Online Dialogue. Joint work with T. Hasegawa, N. Kaji, and M. Toyoda. ACL-13 (long; acceptance rate 26%)
- Identifying Constant and Unique Relations by using Time-Series Text. Joint work with Y. Takaku, N. Kaji, and M. Toyoda. EMNLP-12 (oral; acceptance rate 17%)
- Analysis and Visualization of Temporal Changes in Bloggers' Activities and Interests. Joint work with M. Itoh, M. Toyoda, and M. Kitsuregawa. PacificVis-12 (acceptance rate 34%) [demo]
- Kernel Slicing: Scalable Online Training with Conjunctive Features. Joint work with M. Kitsuregawa. COLING-10 (oral; acceptance rate 19%) [software]
- Efficient Staggered Decoding for Sequence Labeling. Joint work with N. Kaji, Y. Fujiwara, and M. Kitsuregawa. ACL-10 (long; acceptance rate 25%) [software]
- Polynomial to Linear: Efficient Classification with Conjunctive Features. Joint work with M. Kitsuregawa. EMNLP-09 (acceptance rate 34%). (journal ver.). [software]
- Boosting Precision and Recall of Hyponymy Relation Acquisition from Hierarchical Layouts in Wikipedia. Joint work with A. Sumida and K. Torisawa. LREC-08. [software]
- Open-Domain Attribute-Value Acquisition from Semi-Structured Texts. Joint work with K. Torisawa. ISWC-07 workshop, OntoLex. [demo] (writing-support environment)
- Finding Specification Pages According to Attributes. Joint work with K. Torisawa. WWW-06 (poster).
- Improving the Accuracy of Subcategorizations Acquired from Corpora. ACL-04 SRW (acceptance rate 28%)
- A Debug Tool for Practical Grammar Development. Joint work with A. Yakushiji, K. Tateisi, Y. Miyao, and J. Tsujii. ACL-03 (poster; acceptance rate 43%)
- Comparison between CFG Filtering Techniques for LTAG and HPSG. Joint work with Y. Miyao, K. Torisawa, and J. Tsujii. ACL-03 (poster; acceptance rate 43%) (journal ver.)
- Grammar Conversion from LTAG to HPSG. Joint work with Y. Miyao. ESSLLI 2011 Student Session (oral; acceptance rate 26%). (journal ver.). [software]
More publications
Awards
- Best Interactive Award (1st place): the eighth Forum on Data Engineering and Information Management (DEIM) (2019)
- JSAI 30th Anniversary Best Paper Award (2016)
- Best Poster Award: the 17th International Conference on Intelligent Text Processing and Computational Linguistics (CICLing) (2016)
- Best Interactive Award: the eighth Forum on Data Engineering and Information Management (DEIM) (2016)
- Best Paper Award: the WebDB Forum (2015)
- Business Award (Yahoo! Japan Award): the WebDB Forum (2014)
- JSAI SIG Research Award 2013: Japanese Society for Artificial Intelligence, Special Interest Group on Fundamental Problems of Artificial Intelligence (SIG-FPAI) (2013)
- Best Student Paper Award: IEICE Transactions on Information and Systems (2013).
- Best Paper Award: the third Forum on Data Engineering and Information Management (DEIM) (2011).
- Best Paper Award: the 72nd National Convention of IPSJ (2010).
- Best Paper Award: Journal of Natural Language Processing (2009).
- Business Award (1st place): the Symposium on DataBases and Web Information Systems (DBWeb) (2007)
Awards (as a supervisor):
- Young Researcher Award: the 25th Annual Meeting of the Association for Natural Language Processing (NLP) (2019).
- Student Presentation Award: the seventh Forum on Data Engineering and Information Management (DEIM) (2019), for two papers.
- Student Presentation Award: the seventh Forum on Data Engineering and Information Management (DEIM) (2015).
- Student Incentive Award: the WebDB Forum (2014)
- Student Presentation Award: the sixth Forum on Data Engineering and Information Management (DEIM) (2014).
- Student Incentive Award: the WebDB Forum (2013)
- Young Researcher Award: the 19th Annual Meeting of the Association for Natural Language Processing (NLP) (2013).
- Student Presentation Award: the fifth Forum on Data Engineering and Information Management (DEIM) (2013).
- Best Student Paper Award: IEICE technical report on Natural Language Understanding and Models of Communication (2012).
- Student Incentive Award: the fourth Forum on Data Engineering and Information Management (DEIM) (2012).
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