Extraction of Essential Events with Application to Damage Evaluation on Fuel Cells

Teppei Kitagawa, Ken ichi Fukui, Kazuhisa Sato, Junichiro Mizusaki, Masayuki Numao

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

1 Citation (Scopus)


Although sudden changes of the event phase in complex system may indicate underlying essential forces, such events are not frequent. In the present paper, we propose an essential event extractor (E3) scheme to extract relatively rare but cooccurring event sequences in event phase transitions. In E3, the self-organizingmap (SOM) is used as vector quantization (VQ) to encode non-symbolic events and Key-Graph as a co-occurrence graph. Afterwards, event transitions on the co-occurrence graph can be obtained by referring to an occurrence density estimation on the topology map of VQ. We demonstrate the E3 using an acoustic emission (AE) event sequence observed during a damage test of fuel cells and obtain reasonable and essential co-occurring damage sequences that exhibit mechanical effects.

Original languageEnglish
Title of host publicationCombinations of Intelligent Methods and Applications
Subtitle of host publicationProceedings of the 2nd International Workshop,CIMA 2010, France,October 2010
EditorsHatzilygeroudis Ioannis, Prentzas Jim
Number of pages20
Publication statusPublished - 2011

Publication series

NameSmart Innovation, Systems and Technologies
ISSN (Print)2190-3018
ISSN (Electronic)2190-3026


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