Overview

Studio Ousiaでは、学術機関と連携し、自然言語処理の領域における研究開発を推進しています。研究成果は、複数の著名な国際会議やジャーナルに採択されているほか、複数の世界的なコンペティションにおいて、四回の優勝、一回の準優勝をするなどの成果を残しています。また、これらの成果は、弊社製品の実装に使用されています。

Awards

Open Source Softwares

  • Wikipedia2Vec: 単語とエンティティに関するベクトル表現をWikipediaから学習するためのツール
  • mprpc: Pythonで動作する高速なRemote procedure call (RPC) ライブラリ
  • mojimoji: Pythonで動作する高速な日本語の半角・全角文字の変換ライブラリ

Papers

Representation Learning of Entities and Documents from Knowledge Base Descriptions

Ikuya Yamada, Hiroyuki Shindo (NAIST), Yoshiyasu Takefuji (Keio)
International Conference on Computational Linguistics (COLING), 2018 (to appear)

Studio Ousia's Quiz Bowl Question Answering System

Ikuya Yamada, Ryuji Tamaki, Hiroyuki Shindo (NAIST), Yoshiyasu Takefuji (Keio)
First NIPS ’17 Competition, The Springer Series on Challenges in Machine Learning, 2018 (to appear)

Learning Distributed Representations of Texts and Entities from Knowledge Base

Ikuya Yamada, Hiroyuki Shindo (NAIST), Hideaki Takeda (NII), Yoshiyasu Takefuji (Keio)
Transactions of the Association for Computational Linguistics (TACL), 2017

Segment-Level Neural Conditional Random Fields for Named Entity Recognition

Motoki Sato (NAIST), Hiroyuki Shindo (NAIST), Ikuya Yamada, Yuji Matsumoto (NAIST)
International Joint Conference on Natural Language Processing (IJCNLP), 2017

Named Entity Disambiguation for Noisy Text

Yotam Eshel (Technion), Noam Cohen (Technion), Kira Radinsky (Technion, eBay), Shaul Markovitch (Technion), Ikuya Yamada, Omer Levy (University of Washington)
The SIGNLL Conference on Computational Natural Language Learning (CoNLL), 2017

Ensemble of Neural Classifiers for Scoring Knowledge Base Triples

Ikuya Yamada, Motoki Sato (NAIST), Hiroyuki Shindo (NAIST)
WSDM Cup (Cambridge, UK), 2017

Joint Learning of the Embedding of Words and Entities for Named Entity Disambiguation

Ikuya Yamada, Hiroyuki Shindo (NAIST), Hideaki Takeda (NII), Yoshiyasu Takefuji (Keio)
The SIGNLL Conference on Computational Natural Language Learning (CoNLL), (Berlin, Germany), 2016, pp.250-259

Enhancing Named Entity Recognition in Twitter Messages Using Entity Linking

Ikuya Yamada, Hideaki Takeda (NII), Yoshiyasu Takefuji (Keio)
ACL 2015 Workshop on Noisy User-generated Text (Beijing, China), 2015, pp.136-140
(Shared task winner)

An End-to-End Entity Linking Approach for Tweets

Ikuya Yamada, Hideaki Takeda (NII), Yoshiyasu Takefuji (Keio)
WWW 2015 Workshop on Making Sense of Microposts (Florence, Italy), 2015, pp.55-56
(Competition winner)

Evaluating the Helpfulness of Linked Entities to Readers

Ikuya Yamada, Tomotaka Ito, Shinsuke Takagi, Shinnosuke Usami, Hideaki Takeda (NII), Yoshiyasu Takefuji (Keio)
26th ACM Conference on Hypertext and Social Media (Santiago Downtown, Chile), 2014, pp.169-178