講演名 | 2014-11-17 Regularized multi-task learning for multi-dimensional log-density gradient estimation , |
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抄録(英) | Log-density gradient estimation is a fundamental statistical problem and it has various practical applications such as clustering and a measure for non-Gaussianity. A naive two-step approach of first estimating the density and then taking its log-gradient does not perform well because an accurate density estimate does not necessarily lead to an accurate log-density gradient estimate. To cope with this problem, a method to directly estimate the log-density gradient without density estimation was explored. However, even with the direct estimator, high-dimensional log-density gradient estimation is still challenging. In this paper, we propose to apply regularized multi-task learning to direct log-density gradient estimation and show its usefulness experimentally. |
キーワード(和) | |
キーワード(英) | Multi-task learning / log-density gradient estimation |
資料番号 | IBISML2014-58 |
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研究会 | IBISML |
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開催期間 | 2014/11/10(から1日開催) |
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申込み研究会 | Information-Based Induction Sciences and Machine Learning (IBISML) |
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本文の言語 | ENG |
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タイトル(英) | Regularized multi-task learning for multi-dimensional log-density gradient estimation |
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キーワード(1)(和/英) | / Multi-task learning |
第 1 著者 氏名(和/英) | / Ikko YAMANE |
第 1 著者 所属(和/英) | Department of Computer Science, Tokyo Institute of Technology |
発表年月日 | 2014-11-17 |
資料番号 | IBISML2014-58 |
巻番号(vol) | vol.114 |
号番号(no) | 306 |
ページ範囲 | pp.- |
ページ数 | 7 |
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