The generalized energy ratio method for Q estimation

Energy ratio method (ERM), which is a widely used method for coupling loss factors (CLFs) measurement, may lead to numerical problems because of the inversion of a large dimension matrix. The improved energy ratio method proposed here simplified a series several-coupled system into a two-coupled system so that it becomes a two dimensions matrix instead of large dimensions one. Coupling loss factors of a series three-coupled structure are measured using this method. Vibrating responses of the structure has been tested and predicted with loss and coupling loss factors measured here in order to verify the accuracy of measured CLFs. The agreement of vibrating responses indicates the fact that the improved energy ratio method is of great accuracy and reliability.

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A Theoretical Derivation of the Kernel Extreme Energy Ratio Method for EEG Feature Extraction

Lecture Notes in Computer Science - Intelligent Data Engineering and Automated Learning – IDEAL 2008 ◽

10.1007/978-3-540-88906-9_41 ◽

2008 ◽

pp. 321-329

Author(s):

Shiliang Sun

Keyword(s):

Feature Extraction ◽

Energy Ratio ◽

Ratio Method ◽

Theoretical Derivation

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Estimation of quality factors by energy ratio method

Applied Geophysics ◽

10.1007/s11770-014-0471-7 ◽

2015 ◽

Vol 12 (1) ◽

pp. 86-92 ◽

Cited By ~ 7

Author(s):

Zong-Jun Wang ◽

Si-Yuan Cao ◽

Hao-Ran Zhang ◽

Ying-Ming Qu ◽

Dian Yuan ◽

...

Keyword(s):

Energy Ratio ◽

Ratio Method ◽

Quality Factors

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Evaluating Plain Concrete Flexural Toughness Using PCER Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.1184 ◽

2011 ◽

Vol 287-290 ◽

pp. 1184-1188

Author(s):

Jian Guo Han ◽

Pei Yu Yan ◽

Gang Ling Li

Keyword(s):

Plain Concrete ◽

Energy Ratio ◽

Ratio Method ◽

K Value ◽

Flexural Toughness ◽

Strength Grade ◽

Curing Age ◽

Changing Tendency

Using PCER (post-crack energy ratio) method, the influence of strength grade and curing age on flexural toughness of plain concrete were analyzed. Results show that along with the increase of strength grade and curing age, the flexural toughness of plain concrete decrease; and along with the increase of the K value used in the calculating equation, the flexural toughness of plain concrete decrease too. Meanwhile, the changing tendency of PCER value along with the K value manifests that when evaluating the flexural toughness of different quality concrete, the same K value should be used.

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