Kohei Hatano | Last modified date：2017.12.06 |

Graduate School

Undergraduate School

Other Organization

Other

E-Mail

Homepage

##### http://www.i.kyushu-u.ac.jp/~hatano/

Phone

092-802-6031

Academic Degree

Ph.D

Field of Specialization

machine learning

Outline Activities

My main research interest includes Machine Learning, in particular, design and analyses of robust and efficient machine learning algorithms from a theoretical perspective. I am also affiliated with the Learning Analytics Center for analyzing educational data.

Research

**Research Interests**

- Open Science

keyword : open access, open data, open science

2015.08. - Design and analysis of online prediction algorithms

keyword : online learning, computational learning theory, machine learning, optimization, ranking

2007.05. - Analysis and depelopment of boosting algorithms

keyword : boosting, machine learning, computational learning theory, data mining

2000.04[Theoretical analyses of boosting methods] Boosting is a technique for constructing a highly accurate classifier by combining many ``weak'' classifiers. Although boosting has become a fundamental tool in machine learning and data mining these days, its theoretical propeties are yet to be understood. We have analysed theoretical properties of boosting in order to design more efficient boosting methods. As a result, we clarified a property which might be a key for further improvement. So far, we are developping a new boosting algorithm based on our analysis..

**Academic Activities**

**Reports**

1. | , [URL]. |

2. | Report on The 21st Annual Conference on Learning Theory (COLT 2008) . |

3. | Frontier of Theoretical Computer Science. |

**Papers**

**Presentations**

1. | , [URL]. |

2. | Takahiro Fujita, Kohei Hatano, Shuji Kijima, Eiji Takimoto, Online Linear Optimization over Permutations with Precedence Constraints , NIPS 2014 Workshop on Discrete Optimization in Machine Learning(DISCML), 2014.12.13. |

3. | Issei Matsumoto, Kohei Hatano, Eiji Takimoto, Online Prediction with Bradley-Terry Models, NIPS 2014 Workshop on Analysis of Rank Data: Confluence of Social Choice, Operations Research, and Machine Learning, 2014.12.13. |

4. | 畑埜 晃平, Combinatorial Online Prediction via Metarounding, TCE Guest Lecture, 2013.12.16. |

5. | Takahiro Fujita, Kohei Hatano, Eiji Takimoto, Combinatorial Online Prediction Using Offline Approximation Algorithms, The sixth Annual Meeting of Asian Association for Algorithms and Computation (AAAC2013), 2013.04.20. |

6. | Daiki Suehiro, Kohei Hatano, Shuji Kijima, Eiji Takimoto, Kiyohito Nagano, Online Prediction over Base Polyhedra , NIPS 2012 Workshop on Discrete Optimization in Machine Learning(DISCML), 2012.12.07. |

7. | Online Rank Aggregation. |

8. | Online Rank Aggregation. |

9. | Learning evaluation functions for Shogi via bipertite ranking learning with SVMs . |

10. | Learning evaluation functions for Shogi via bipertite ranking learning with SVMs . |

11. | Online Rank Aggregation. |

12. | Online Rank Aggregation. |

13. | Online Learning Based On Maximum Entropy Principle. |

14. | Online Learning of Maximum p-Norm Margin Classifiers with Bias. |

15. | Efficient online learning of linear threshold functions with large biases.. |

16. | Boosting using classifiers with nearly one-sided error. |

**Membership in Academic Society**

- EATCS
- IEICE
- LA

**Awards**

- JSAI Incentive Award
- JSAI Incentive Award

Educational

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