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Paper Abstract and Keywords
Presentation 2025-01-30 15:10
Considerations on Parameter Setting for Anomaly Detection Method eLAD Based on Graph Spectrum Shift
JungWon Wi, Mikihiro Yasuda, Yusuke Sakumoto (Kwansei Gakuin Univ.) CQ2024-74
Abstract (in Japanese) (See Japanese page) 
(in English) We have previously proposed eLAD (extended Laplacian Anomaly Detection) as a method for detecting anomalies in temporal networks by representing network structures with Laplacian matrices and analyzing their eigenvalues. Unlike the original LAD, eLAD aims to improve detection accuracy by observing changes in both the top and bottom eigenvalues of the Laplacian matrix. However, our previous studies have not sufficiently examined how to appropriately set the ratio of bottom to top eigenvalues in eLAD based on several conditions. In this paper, we explore a method for appropriately setting the ratio of bottom eigenvalues in eLAD by utilizing GSS (Graph Spectrum Shift). We validate the effectiveness of the proposed method through numerical experiments using temporal networks generated from synthetic and real-world networks.
Keyword (in Japanese) (See Japanese page) 
(in English) Anomaly Detection / Dynamic Network / Spectral Graph Theory / Laplacian Matrix / Network Analysis / Low-Rank Approximation / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 368, CQ2024-74, pp. 27-32, Jan. 2025.
Paper # CQ2024-74 
Date of Issue 2025-01-23 (CQ) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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 CQ2024-74

Conference Information
Committee CQ CBE  
Conference Date 2025-01-30 - 2025-01-31 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) Network Science, Computational Social Science, Human Computer Interaction, Data Analysis, User Behaviour, Media Quality, etc. 
Paper Information
Registration To CQ 
Conference Code 2025-01-CQ-CBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Considerations on Parameter Setting for Anomaly Detection Method eLAD Based on Graph Spectrum Shift 
Sub Title (in English)  
Keyword(1) Anomaly Detection  
Keyword(2) Dynamic Network  
Keyword(3) Spectral Graph Theory  
Keyword(4) Laplacian Matrix  
Keyword(5) Network Analysis  
Keyword(6) Low-Rank Approximation  
Keyword(7)  
Keyword(8)  
1st Author's Name JungWon Wi  
1st Author's Affiliation Kwansei Gakuin University (Kwansei Gakuin Univ.)
2nd Author's Name Mikihiro Yasuda  
2nd Author's Affiliation Kwansei Gakuin University (Kwansei Gakuin Univ.)
3rd Author's Name Yusuke Sakumoto  
3rd Author's Affiliation Kwansei Gakuin University (Kwansei Gakuin Univ.)
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Speaker Author-1 
Date Time 2025-01-30 15:10:00 
Presentation Time 20 minutes 
Registration for CQ 
Paper # CQ2024-74 
Volume (vol) vol.124 
Number (no) no.368 
Page pp.27-32 
#Pages 6 
Date of Issue 2025-01-23 (CQ) 

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