Large-scale tensor decomposition for high-level information processing

2014 Fiscal Year Final Research Report

• Project/Area Number: 25880028
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Intelligent informatics
• Research Institution: National Institute of Informatics
• Principal Investigator: HAYASHI Kohei 国立情報学研究所, ビッグデータ数理国際研究センター, 特任助教 (30705059)
• Project Period (FY): 2013-08-30 – 2015-03-31
• Keywords: 非負行列分解 / Twitter / トピック抽出 / ストリーミング処理

Outline of Final Research Achievements

We proposed a streaming algorithm of non-negative matrix factorization for a sequence of matrices such as time series. We evaluated its performance by applying to the Twitter stream, which is one of the popular social network services. Our algorithm allows to handle all Japanese tweets in real-time, which tells us what topics are "hot" in that moment for every second.

Free Research Field

機械学習