NDLI: Analysis of environmental electromagnetic signal using nonnegative Matrix Factorization minimizing quasi-L1 norm

Content Provider	IEEE Xplore Digital Library
Author	Mouri, M. Funase, A. Cichocki, A. Takumi, I. Yasukawa, H.
Copyright Year	2011
Description	Author affiliation: Nagoya Institute of Technology, Dept. of Computer Science and Engineering, Gokiso-cho, Showa-ku, 466-8555 Japan (Funase, A.; Takumi, I.) \|\| Aichi University, Faculty of Business Administration, 370 Shimizu, Kurozasa-cho, Miyoshi, 470-0296, Japan (Mouri, M.) \|\| Aichi Prefectural University, Grad. School of Information Science and Technology, 1522-3 Kumabari, Nagakute, 480-1198 Japan (Yasukawa, H.) \|\| RIKEN, Brain Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198 Japan (Cichocki, A.)
Abstract	Anomalous environmental electromagnetic (EM) radiation waves have been reported as the portents of earthquakes. We have been measuring the Extremely Low Frequency (ELF) range all over Japan. Our goal is to predict earthquakes using EM radiation waves. The recorded data often contain signals unrelated to earthquakes. These signals, as noise, confound earthquake prediction efforts. It is necessary to eliminate noises from observed signals in a preprocessing step. In previous researches, we used ISRA, an algorithm of the Nonnegative Matrix Factorization (NMF), to estimate source signal. However, ISRA is not robust for outliers because ISRA's cost function is based on square distance. In order to improve robustness, we should use lower order cost function. In this paper, we propose a nonnegative matrix factorization method using quasi-L1 norm in cost function (quasi-L1 NMF). In the experiment using ELF observed signals that include outliers, the proposed method extracts source signals more accurately than ISRA.
Starting Page	1846
Ending Page	1849
File Size	899899
Page Count	4
File Format	PDF
ISBN	9781457710032
ISSN	21537003
e-ISBN	9781457710056
DOI	10.1109/IGARSS.2011.6049482
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Earthquakes Ground penetrating radar Geophysical measurement techniques Cost function Electromagnetics Robustness Approximation methods earthquake electromagnetic wave source separation nonnegative matrix factorization l1 norm
Content Type	Text
Resource Type	Article

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