| Presentation | 2022-03-29 Classification of power spectra of EEG by non-negative matrix factorization Kazuki Koyama, Mariko Ito, Masanori Sakaguchi, Takaaki Ohnishi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It has been common for experts to manually and subjectively classify sleep stages in the experiments for the sleep of mice. Recently, however, automized methods for classification using supervised learning have been proposed. We attempt to determine the sleep stage by an unsupervised learning, Non-negative Matrix Factorization. By applying Non-negative Matrix Factorization to a large matrix incorporating power spectra of EEG of all the mice for each time window, we obtained the basis and activation matrices, where the former matrix exhibits the bases of power spectra. We examined whether we can determine the sleep stage of mice by comparing the activation corresponding to each basis with the label of sleep stage given by experts. In addition, we, for each mouse, obtained the basis matrix by applying Non-negative Matrix Factorization to the matrix of power spectrum for each mouse. We classified mice based on the similarity of the bases of power spectra. The result implies the existence of universal bases of power spectra for mice. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Non-negative Matrix Factorization / EEG / power spectra / sleep stage classification / mouse |
| Paper # | MSS2021-76,NLP2021-147 |
| Date of Issue | 2022-03-21 (MSS, NLP) |
| Conference Information | |
| Committee | MSS / NLP |
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| Conference Date | 2022/3/28(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | MSS, NLP, Work In Progress (MSS only), and etc. |
| Chair | Atsuo Ozaki(Osaka Inst. of Tech.) / Takuji Kosaka(Chukyo Univ.) |
| Vice Chair | Shingo Yamaguchi(Yamaguchi Univ.) / Akio Tsuneda(Kumamoto Univ.) |
| Secretary | Shingo Yamaguchi(Hokkaido Univ.) / Akio Tsuneda(NEC) |
| Assistant | Masato Shirai(Shimane Univ.) / Hideyuki Kato(Oita Univ.) / Yuichi Yokoi(Nagasaki Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Mathematical Systems Science and its Applications / Technical Committee on Nonlinear Problems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Classification of power spectra of EEG by non-negative matrix factorization |
| Sub Title (in English) | |
| Keyword(1) | Non-negative Matrix Factorization |
| Keyword(2) | EEG |
| Keyword(3) | power spectra |
| Keyword(4) | sleep stage classification |
| Keyword(5) | mouse |
| 1st Author's Name | Kazuki Koyama |
| 1st Author's Affiliation | Rikkyo University(Rikkyo Univ.) |
| 2nd Author's Name | Mariko Ito |
| 2nd Author's Affiliation | Rikkyo University(Rikkyo Univ.) |
| 3rd Author's Name | Masanori Sakaguchi |
| 3rd Author's Affiliation | University of Tsukuba(Univ. Tsukuba) |
| 4th Author's Name | Takaaki Ohnishi |
| 4th Author's Affiliation | Rikkyo University(Rikkyo Univ.) |
| Date | 2022-03-29 |
| Paper # | MSS2021-76,NLP2021-147 |
| Volume (vol) | vol.121 |
| Number (no) | MSS-443,NLP-444 |
| Page | pp.pp.111-116(MSS), pp.111-116(NLP), |
| #Pages | 6 |
| Date of Issue | 2022-03-21 (MSS, NLP) |