Spectral Factor Analysis for Multi-isotope Imaging in Nuclear Medicine

1999 ◽  
pp. 442-447 ◽  
Author(s):  
I. Buvat ◽  
S. Hapdey ◽  
H. Benali ◽  
A. Todd-Pokropek ◽  
R. Di Paola
Keyword(s):  
Nuclear Medicine ◽  
Factor Analysis ◽  
Spectral Factor

scholarly journals Comparison of Multivariate Analysis Methods as Applied to English Speech

2020 ◽  
Vol 10 (20) ◽  
pp. 7076
Author(s):  
Yixin Zhang ◽  
Yoshitaka Nakajima ◽  
Kazuo Ueda ◽  
Takuya Kishida ◽  
Gerard B. Remijn
Keyword(s):  
Factor Analysis ◽  
Multivariate Analyses ◽  
Three Dimensional ◽  
Speech Acoustics ◽  
Spectral Changes ◽  
Acoustic Correlates ◽  
New Finding ◽  
Three Dimensional Configuration ◽  
First Time ◽  
Spectral Factor

A newly developed factor analysis, origin-shifted factor analysis, was compared with a normal factor analysis to analyze the spectral changes of English speech. Our first aim was to investigate whether these analyses would cause differences in the factor loadings and the extracted spectral-factor scores. The methods mainly differed in whether to use cepstral liftering and an origin shift. The results showed that three spectral factors were obtained in four main frequency bands, but neither the cepstral liftering nor the origin shift distorted the essential characteristics of the factors. This confirms that the origin-shifted factor analysis is more recommendable for future speech analyses, since it would reduce the generation of noise in resynthesized speech. Our second aim was to further identify acoustic correlates of English phonemes. Our data show for the first time that the distribution of obstruents in English speech constitutes an L-shape related to two spectral factors on the three-dimensional configuration. One factor had center loadings around 4100 Hz, while the other was bimodal with peaks around 300 Hz and 2300 Hz. This new finding validates the use of multivariate analyses to connect English phonology and speech acoustics.

Generalized five-dimensional dynamic and spectral factor analysis

2006 ◽  
Vol 33 (4) ◽  
pp. 1016-1024 ◽  
Author(s):  
Georges El Fakhri ◽  
Arkadiusz Sitek ◽  
Robert E. Zimmerman ◽  
Jinsong Ouyang
Keyword(s):  
Factor Analysis ◽  
Spectral Factor

Evolutionary spectral factor analysis of doping-undoping processes of thin conductive polymer films

1990 ◽  
Vol 294 (1-2) ◽  
pp. 59-72 ◽  
Author(s):  
Jouko Kankare ◽  
Jukka Lukkari ◽  
Timo Pajunen ◽  
Janne Ahonen ◽  
Csaba Visy
Keyword(s):  
Factor Analysis ◽  
Polymer Films ◽  
Conductive Polymer ◽  
Spectral Factor

Knowledge-based factor analysis of multidimensional nuclear medicine image sequences

1994 ◽  
Author(s):  
Jeffrey T. Yap ◽  
Chin-Tu Chen ◽  
Malcolm Cooper ◽  
Jon D. Treffert
Keyword(s):  
Nuclear Medicine ◽  
Factor Analysis ◽  
Image Sequences ◽  
Knowledge Based
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