Information-divergence based methods for acoustic micro-defect identification in materials

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F11%3A00329602" target="_blank" >RIV/68407700:21340/11:00329602 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/11:00187626

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Information-divergence based methods for acoustic micro-defect identification in materials

Popis výsledku v původním jazyce

We deal with the diversity of acoustic emission sources in materials through signal processing methodology for the data sets detected by the measurement device Dakel Xedo 5. Applying the following methods of Fuzzy Clustering (FC), Model-Based Clustering (MBC) and Support Vector Machines (SVM) in combination with empirical nonstandard signal and spectrum attributes, we arrive to the efficient source separation technique. These methods belong to fundamentally different groups. The FC is based on the optimization of an objective function. The MBC consists of two parts - the Agglomerat.ive Clustering and the iterative EM algorithm [1] minimizing likelihood function of the statistical model under consideration. Finally, the SVM [2] searches for optimal separating liyperplanes between clusters. The signals are compared by means of suitable parameters obtained directly from detected signals or their normalized spectral density estimates. We also use distinctive (Φ-divergence dista nee measures [3] between signal spectra as the additional attribute for the signal cluster separation. The structure of Φ-divergeuce parameter is given in discrete form by DΦ(S̃ refer, S̃)= ∑ T-1 f=0 S̃(f)Φ (S̃ refer(f)/ S̃(f)), where S̃ refer is a normed reference spectrum from the number m of samples of a given signal type and S̃ stands for the normalized spectrum of individual signals.

Název v anglickém jazyce

Information-divergence based methods for acoustic micro-defect identification in materials

Popis výsledku anglicky

We deal with the diversity of acoustic emission sources in materials through signal processing methodology for the data sets detected by the measurement device Dakel Xedo 5. Applying the following methods of Fuzzy Clustering (FC), Model-Based Clustering (MBC) and Support Vector Machines (SVM) in combination with empirical nonstandard signal and spectrum attributes, we arrive to the efficient source separation technique. These methods belong to fundamentally different groups. The FC is based on the optimization of an objective function. The MBC consists of two parts - the Agglomerat.ive Clustering and the iterative EM algorithm [1] minimizing likelihood function of the statistical model under consideration. Finally, the SVM [2] searches for optimal separating liyperplanes between clusters. The signals are compared by means of suitable parameters obtained directly from detected signals or their normalized spectral density estimates. We also use distinctive (Φ-divergence dista nee measures [3] between signal spectra as the additional attribute for the signal cluster separation. The structure of Φ-divergeuce parameter is given in discrete form by DΦ(S̃ refer, S̃)= ∑ T-1 f=0 S̃(f)Φ (S̃ refer(f)/ S̃(f)), where S̃ refer is a normed reference spectrum from the number m of samples of a given signal type and S̃ stands for the normalized spectrum of individual signals.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of Forum Acusticum 2011

ISBN

978-84-694-1520-7

ISSN

—

e-ISSN

2221-3767

Počet stran výsledku

6

Strana od-do

991-996

Název nakladatele

European Acoustics Association

Místo vydání

Madrid

Místo konání akce

AALBORG

Datum konání akce

26. 6. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—