On the factors affecting the performance of the generalized cross validation method in the context of nearfield acoustic holography

2016 ◽  
Author(s):  
Kanthasamy Chelliah ◽  
Ganesh Raman ◽  
Ralph Muehleisen
Keyword(s):  
Cross Validation ◽  
Acoustic Holography ◽  
Factors Affecting ◽  
Validation Method ◽  
Generalized Cross Validation ◽  
Nearfield Acoustic Holography

Leakage Detection Techniques Using Nearfield Acoustic Holography

2014 ◽  
Author(s):  
Kanthasamy Chelliah ◽  
Ganesh Raman ◽  
Ralph T. Muehleisen
Keyword(s):  
Cross Validation ◽  
Acoustic Pressure ◽  
Leakage Detection ◽  
Acoustic Source ◽  
Acoustic Holography ◽  
Noise Sources ◽  
Detection Techniques ◽  
Transformation Matrices ◽  
Detection Capabilities ◽  
Nearfield Acoustic Holography

This paper attempts to explore the possibilities of using various methods of nearfield acoustic holography (NAH) to detect the air/sound leakages from a container by locating the noise sources. The detection capabilities of three different NAH methods are compared. An acoustic source is placed inside the container and the hologram measurement is performed near the surface of the container. The NAH methods are applied on the hologram data to detect and quantify the leakage locations. Reconstructed acoustic pressure and particle velocity results are presented. NAH algorithms are found to work better for the higher input frequency cases. Tikhonov regularization is used to alleviate the singularity in the transformation matrices. However, generalized cross validation over-predicts the Tikhonov parameter for the present geometry. The resolution limitations of the NAH methods with respect to the hologram distance are addressed.

Effects of the threshold function form for wavelet noise reduction with generalized cross-validation method

2004 ◽  
Vol 1268 ◽  
pp. 1238
Author(s):  
Hideaki Kubota ◽  
Nobuyoshi Tanki ◽  
Takafumi Nanjo ◽  
Kazunori Kawakami ◽  
Youichi Yamazaki ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Cross Validation ◽  
Threshold Function ◽  
Function Form ◽  
Validation Method ◽  
Generalized Cross Validation

The data complexity index to construct an efficient cross-validation method

2010 ◽  
Vol 50 (1) ◽  
pp. 93-102 ◽  
Author(s):  
Der-Chiang Li ◽  
Yao-Hwei Fang ◽  
Y.M. Frank Fang
Keyword(s):  
Cross Validation ◽  
Data Complexity ◽  
Validation Method ◽  
Complexity Index

A note on generalized cross-validation with replicates

1992 ◽  
Vol 14 (4) ◽  
pp. 283-287 ◽  
Author(s):  
Chong Gu ◽  
Nancy Heckman ◽  
Grace Wahba
Keyword(s):  
Cross Validation ◽  
Generalized Cross Validation
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