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Paper Abstract and Keywords
Presentation 2025-12-12 13:50
Investigation of the Effect of Oscillation Frequency Variation in Coupled Oscillators Reservoir on Spoken Digit Recognition
Yasufumi Kajino, Yoko Uwate, Yoshifumi Nishio (Tokushima Univ.) NLP2025-78
Abstract (in Japanese) (See Japanese page) 
(in English) Inrecent years, physical reservoir computing (PRC), which implements reservoir layers using physical systems, has
been gaining attention.
However, PRC is known to depend on both the system and the task.
Furthermore, parameter tuning also greatly impacts its performance.
In this study, a model was proposed in which a physical system composed of van der Pol oscillators coupled via resistors serves as the reservoir layer.
The coupled oscillator system was calculated using computer simulation, and a spoken digit recognition task was performed using the proposed model.
The frequency, a parameter specific to the oscillator, was varied, and its effect was evaluated.
The results confirmed that recognition accuracy varied depending on the frequency, and that accuracy improved within a specific frequency range.
The importance of parameter tuning in the proposed model was revealed.
Keyword (in Japanese) (See Japanese page) 
(in English) Coupled oscillators / Frequency / Reservoir computing / Time series classification / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 283, NLP2025-78, pp. 123-126, Dec. 2025.
Paper # NLP2025-78 
Date of Issue 2025-12-04 (NLP) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF NLP2025-78

Conference Information
Committee NLP  
Conference Date 2025-12-11 - 2025-12-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Kochi Castle Museum of History 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Nonlinear problem, etc 
Paper Information
Registration To NLP 
Conference Code 2025-12-NLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation of the Effect of Oscillation Frequency Variation in Coupled Oscillators Reservoir on Spoken Digit Recognition 
Sub Title (in English)  
Keyword(1) Coupled oscillators  
Keyword(2) Frequency  
Keyword(3) Reservoir computing  
Keyword(4) Time series classification  
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1st Author's Name Yasufumi Kajino  
1st Author's Affiliation Tokushima University (Tokushima Univ.)
2nd Author's Name Yoko Uwate  
2nd Author's Affiliation Tokushima University (Tokushima Univ.)
3rd Author's Name Yoshifumi Nishio  
3rd Author's Affiliation Tokushima University (Tokushima Univ.)
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Speaker Author-1 
Date Time 2025-12-12 13:50:00 
Presentation Time 20 minutes 
Registration for NLP 
Paper # NLP2025-78 
Volume (vol) vol.125 
Number (no) no.283 
Page pp.123-126 
#Pages 4 
Date of Issue 2025-12-04 (NLP) 

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