Provider: ingentaconnect
Database: ingentaconnect
Content: application/x-research-info-systems
TY - ABST
AU - Jung, Young Mee
AU - Kim, Seung Bin
AU - Noda, Isao
TI - New Approach to Generalized Two-Dimensional Correlation Spectroscopy. IV: Eigenvalue Manipulation Transformation (EMT) for Partial Attenuation of Dominant Factors
JO - Applied Spectroscopy
PY - 2003-07-01T00:00:00///
VL - 57
IS - 7
SP - 850
EP - 857
KW - TWO-DIMENSIONAL 2D CORRELATION SPECTROSCOPY
KW - EMT
KW - PCA-2D CORRELATION SPECTROSCOPY
KW - EIGENVALUE MANIPULATING TRANSFORMATION
N2 - This paper extends our previous work on the potential of *eigenvalue manipulating transformation* (EMT) of a data matrix for spectral selectivity enhancement in two-dimensional (2D) correlation analysis.
EMT operation by uniformly lowering the power of a set of eigenvalues associated with the original data exaggerates the information content of minor principal components and reduces that of major principal
components. Thus, much more subtle differences of spectral behavior for each component are now highlighted. Similarly, the selective truncation of dominant principal component (PC) factors to bring up the
subtle contributions of minor factors is also considered. The EMT-reconstructed data matrix where power parameter *m* is negative greatly reduces the contribution of the first PC. Hybrid models for
the attenuation of the contribution of the first PC are discussed. Synchronous 2D correlation spectra from PC1-attenuated data matrix A** obtained by varying the value of the attenuation parameter *k*
show a much more profound effect than asynchronous 2D correlation spectra. As the value of *k* is increased, features of 2D correlation spectra start looking very much like those from the principle
component analysis (PCA)-reconstructed data with only the second and third PCs and from the EMT-reconstructed data matrix where the power parameter *m* is negative.
UR - http://www.ingentaconnect.com/content/sas/sas/2003/00000057/00000007/art00018
M3 - doi:10.1366/000370203322102951
UR - http://dx.doi.org/10.1366/000370203322102951
ER -