Automatic Analysis of Composite Physical Signals Using Non-Negative Factorization and Information Criterion

PLoS ONE 7 巻 3 号 e32352- 頁 2012 発行
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タイトル ( eng )
Automatic Analysis of Composite Physical Signals Using Non-Negative Factorization and Information Criterion
作成者
Watanabe Kenji
Hidaka Akinori
Otsu Nobuyuki
収録物名
PLoS ONE
7
3
開始ページ e32352
抄録
In time-resolved spectroscopy, composite signal sequences representing energy transfer in fluorescence materials are measured, and the physical characteristics of the materials are analyzed. Each signal sequence is represented by a sum of non-negative signal components, which are expressed by model functions. For analyzing the physical characteristics of a measured signal sequence, the parameters of the model functions are estimated. Furthermore, in order to quantitatively analyze real measurement data and to reduce the risk of improper decisions, it is necessary to obtain the statistical characteristics from several sequences rather than just a single sequence. In the present paper, we propose an automatic method by which to analyze composite signals using non-negative factorization and an information criterion. The proposed method decomposes the composite signal sequences using non-negative factorization subjected to parametric base functions. The number of components (i.e., rank) is also estimated using Akaike's information criterion. Experiments using simulated and real data reveal that the proposed method automatically estimates the acceptable ranks and parameters.
NDC分類
情報科学 [ 007 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
Public Library of Science
発行日 2012
権利情報
(c) 2012 Watanabe et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Funding: This research is supported by the ordinary budget in the National Institute of Advanced Industrial Science and Technology
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 1932-6203
[DOI] 10.1371/journal.pone.0032352
[DOI] http://dx.doi.org/10.1371/journal.pone.0032352