Kohei Ozaki (a.k.a. @smly) is a Software Engineer at Ubie. My specialties are around data and machine learning. I love to discover knowledge and hidden values in data.保険/金融/広告ほか様々な事業でデータ分析や研究開発などの業務を 10 年以上経験してきました。 現在はUbie株式会社でソフトウェアエンジニアをしています。またTURING株式会社でフェローをしています。
Data Science Competitions
I am a Kaggle competitions' Grandmaster (an honor to top competitors with outstanding data science skills) with 19 kaggle competitions' gold medals. My highest kaggle rank is 4th of 530,000+ data scientists on 2016 April.
ACM/ICPC is an annual multi-tiered competitive programming competition among the universities of the world. I joined this contest with my friends at Tokyo University of Science and advanced to the Asia Regional Contest.
📄 Shuhei Yokoo, Kohei Ozaki, Edgar Simo-Serra, Satoshi Iizuka, "Two-stage discriminative re-ranking for large-scale landmark retrieval", 2020. [arxiv]
📄 Yusuke Niitani, Toru Ogawa, Shuji Suzuki, Takuya Akiba, Tommi Kerola, Kohei Ozaki, Shotaro Sano, "Team PFDet's Methods for Open Images Challenge 2019", 2019. [arxiv]
📄 Kohei Ozaki, Shuhei Yokoo, "Large-scale landmark retrieval and recognition under a noisy and diverse dataset ", 2019. [arxiv][github]
📄 Kohei Ozaki, Masashi Shimbo, Mamoru Komachi, Yuji Matsumoto, "Mutual k-Nearest Neighbor Graph Construction in Graph-based Semi-Supervised Classification ", Tra nsactions of the Japanese Society for Artificial Intelligence, 2013.
📄 Kohei Ozaki, Masashi Shimbo, Mamoru Komachi, Yuji Matsumoto, "Using the mutual k-nearest neighbor graphs for semi-supervised classification on natural language data", Proceedings of the fifteenth conference on computational natural language learning, 2011.
📄 Asad Habib, Masayuki Asahara, Yuji Matsumoto, Kohei Ozaki, "JaPak IEOU: Japan-Pakistan's Input English Output Urdu a case sensitive standard input system for Perso-Arabic script clients", IEEE 2010 International Conference on Information and Emerging Technologies, 2010.