ThreeMode Abstracts, Part Z
With one can go to the index of
this part of the Abstracts, with
one can go to other
parts (letters) of the Abstracts.
INDEX
Za  Zb 
Zc  Zd 
Ze  Zf 
Zg  Zh 
Zi  Zj 
Zk  Zl 
Zm  Zn 
Zo  Zp 
Zq  Zr 
Zs  Zt 
Zu  Zv 
Zw  Zx 
Zy  Zz 


Zampronio, C. G., Gurden, S. P., Moraes, L. A. B., Eberlin, M. N., Smilde, A. K., & Poppi, R. J. (2002).
Direct sampling tandem mass spectrometry (MS/MS) and multiway calibration for isomer quantitation.
Analyst, 127, 10541060.
Direct sampling tandem mass spectrometry (MS/MS) was used for the quantitation
of mixtures of the isomers 2, 3 and 4ethyl pyridine. The similarity between the analytes and
the secondorder nature of MS/MS data require the use of multivariate calibration techniques
capable of handling multiway data. Multilinear PLS (NPLS) was applied here, as well as the
alternative technique of unfolding the data and using standard twoway PLS. Particular attention
was paid to the optimal type of spectral preprocessing. Due to the presence of heteroscedastic
noise the logarithmic transform of the spectra prior to calibration gives the best results.
Predictions errors of the order of 1015% were obtained, which compare well with other results
found in the literature.

Zarzo, M., & Ferrer, A. (2004).
Batch process diagnosis: PLS with variable selection versus blockwise PCR.
Chemometrics and Intelligent Laboratory Systems, 73, 1527.
Data from a batch chemical process have been analysed in order to
diagnose the causes of variability of a final quality parameter. The trajectories of
47 process variables from 37 batches have been arranged in a matrix by using alignment
methods. Two different approaches are compared to diagnose the key process variables:
PLS with variable selection and blockwise PCR. The application of Unfold Partial Least
Squares Regression (UPLS) leads to one significant component. By means of weight plots,
the variables most correlated with the final quality are identified. Nevertheless, with
observed data, it is not possible to know if correlation is due to causality (and hence
related to a critical point) or is due to other causes. Pruning PLS models by using
variable selection methods and technical information of the process has allowed the
process variables most correlated with the final quality to be revealed. The application
of Principal Component Regression to the trajectories of the process variables
(blockwise PCR) has given straightforward results without requiring a deep knowledge of
the process. The results obtained have been used to propose several hypotheses about the
likely key process variables that require a better control, as a previous step to
conducting further studies for process diagnosis and optimisation, like experimental
designs.

Zeng, Y., & Hopke, P.K. (1990).
Methodological study applying threemode factor analysis to
threeway chemical data sets. Chemometrics and Intelligent
Laboratory Systems, 7, 237250.
A multivariate data analysis method, threemode factor analysis (TMFA), has
primarily been employed in the social sciences. Although it has not been
extensively used in the natural sciences, TMFA provides the opportunity to
examine data that are collected in form of a threeway matrix. With TMFA, one
can simultaneously examine system variations in the three dimensions to
determine the causal factors that control the system. This approach has been
applied to the receptor modeling problem that attempts to relate ambient air
quality to sources of pollution. By simulating an air pollution system, the
relationships between the results of TMFA and the underlying physical model are
investigated. In this way, the physical interpretation of the results of TMFA
has been found. The model can be generalized to suit many threeway chemical
data sets. It is also found that varimax rotation of the initially derived
factors greatly improves their interpretability. The rotated solution can
reflect the nature of the underlying physical system.

Zeng, Y., & Hopke, P.K. (1992a).
A new receptor model: A direct trilinear
decomposition followed by a matrix reconstruction.
Journal of Chemometrics, 6, 6583.
In many cases, monitoring data for ambient
airborne particles can be organized in the form of
a threeway data table with one way for chemical
species, one for sampling periods and one for
sites. A direct trilinear decomposition followed
by a matrix reconstruction (DTDMR) is developed to
analyze such a data table as a whole. The
threeway data set is composed into three twoway
matrices by a direct trilinear decomposition
(DTD). The column vectors of each of the matrices
are called 'source profiles', 'emission patterns'
and 'site coefficients' respectively. Particulate
sources are identified by examining both their
source profiles and emission patterns. After the
sources have been identified, emission patterns
and site coefficients are used to produce a
threeway matrix that gives estimates of mass
contributions of sources to the samples collected
at every site in every period. By simulation
study, not only has the method been verified, but
a good indicator has been found that shows the
number of factors (i.e. Sources) in the system.
Unlike other receptor models, DTDMR does not
require source profile data and does not involve
trialanderror procedures. Since DTDMR identifies
sources based on variations in two dimensions, it
has a higher potential to distinguish two sources
that have similar chemical compositions. The DTDMR
model has provided excellent results with
simulated data and has been applied in a real
world threeway data set.

Zeng, Y.S., & Hopke, P.K. (1992b).
The application of threemode factor analysis (TMFA)
to receptor modeling of scenes particle data.
Atmospheric Environment, 26A, 17011711.
In the previous applications of eigenvector
mathematical methods such as factor analysis,
principal components analysis, and empirical
orthogonal function analysis, the analysis has
been made on a twodimensional set of data. These
data sets could be the chemical composition of a
series of particle samples taken at a single
location over time or the concentration of a
single species measured over multiple locations at
multiple times. However, there have not been
methods previously available to examine a data set
of chemical compositions measured at multiple
sites over a series of sampling time intervals.
Threemode factor analysis permits the reduction
of a threedimensional data set into three
twodimensional matrices and a threedimensional
core matrix that presents how the system variance
is partitioned among the three modes (chemical
species, location and time). The technique will be
illustrated with data from the scenes program that
is measuring particle compositions at a number of
sites in the southwestern united states.

Zenisek, T.J. (1978).
Threemode factor analysis via a modification of Tucker's
computational methodIII. Educational and Psychological
Measurement, 38, 787792.
Description of program based on Tucker's (1966) Method III for
large data sets.

Zenisek, T.J. (1980).
The measurement of job satisfaction: a threemode factor
analysis. Unpublished doctoral thesis, Ohio State
University. ( Dissertation Abstracts
International, 1980, 41 (1A), 75).
Eight operational measures, each consisting of 23 common job
facets were administered to 304 operatives, clerical and first
line managers in four widely dispersed steel fabricating
plants in order to replicate current finding the literature as
well as test the efficacy of threemode factor analysis as a
data analytic technique.

Zhang, T., & Golub, G.H. (2001).
Rankone approximation to high order tensors. Siam Journal on Matrix Analysis and
Applications, 23, 534550.
The singular value decomposition (SVD) has been extensively used in engineering
and statistical applications. This method was originally discovered by Eckart and Young
(Psychometrika, 1 (1936), pp. 211218), where they considered the problem of
lowrank approximation to a matrix. A natural generalization of the SVD is
the problem of lowrank approximation to high order tensors, which we call
the multidimensional SVD. In this paper, we investigate certain properties of
this decomposition as well as numerical algorithms.

Zheng, Y. L., McAvoy, T. J., Huang, Y. B., & Chen, G. (2001).
Application of multivariate statistical analysis in batch processes.
Industrial & Engineering Chemistry Research, 40, 16411649.
Multivariate statistical analysis methods such as principal component analysis (PCA)
and partial least squares (PLS) are powerful tools for chemical process modeling and monitoring. This
paper applies PCA/PLS techniques and their variants, multiway PCA/PLS and orthogonal PCA, to an
industrial batch process. The study utilizes an existing large historical process data set and
combines multivariate statistical methods with batch time optimization calculations to identify
possibilities for process improvement. The objective is to increase throughput by shortening the
batch reaction time. The batch time optimization calculations provide feasible setpoint operational
suggestions while maintaining the underlying data correlation structure. A pseudosetpoint approach
is also proposed to investigate the reaction period during which the setpoint profiles remain constant.
Results for an industrial reactor indicate that the batch time can be shortened by approximately 4.3%.

Zheng L., HasegawaJohnson, M., & Pizza, S. (2003).
Analysis of the threedimensional tongue shape using a threeindex factor analysis model.
Journal of the Acoustical Society of America, 113, 478486.
Threedimensional tongue shape during vowel production is
analyzed using the threemode PARAFAC (parallel factors) model.
Threedimensional MRI images of,five speakers (9 vowels) are analyzed.
Sixtyfive virtual fleshpoints (13 segments along the rostralcaudal
dimension and 5 segments along the rightleft direction) are chosen based
on the interpolated tongue shape images. Methods used to adjust the
alignment of MRI images, to set up the fleshpoints, and to measure the
position of the fleshpoints are presented. PARAFAC analysis of this 3D
coordinate data results in a stable twofactor solution that explains
about 70% of the variance.

Zhou, YX., Xu., L., Wu, YP., & Liu, BL. (1999).
A QSAR study of the antiallergic activities of substituted benzamides and their structures.
Chemometrics and Intelligent Laboratory Systems., 45, 95100.
Multiple regression analysis (MRA) and comparative molecular field analysis (CoMFA) have been
used in studies of the correlation between the antiallergic activities of substituted benzamides and their
structures. The results achieved using CoMFA based on 3D factors are much better than those obtained using MRA
based on mainly 2D structural information. The CoMFA results reveal that the steric effects are more important
than the electrostatic effects for the activities of substituted benzamides.

Zhu, X., Zhang, L., Che, X., & Wang, L. (1999).
The classification of hydrocarbons with factor analysis and the PONA analysis of gasoline.
Journal of Chemometrics and Intelligent Laboratory Systems, 45, 147155.
The feasibility of classification of hydrocarbons by factor analysis was studied. The difference
between the retention indices of 191 hydrocarbons on stationary phases DB1 and DB5 at the same temperature and
their temperature coefficients on each column were processed with Varimax orthogonal rotation and Promax oblique
rotation. The hydrocarbons were successfully classified into paraffins (P), olefins (O), naphthenes (N) and
aromatics (A). A gasoline sample was analyzed and the PONA value was obtained with the above method. The
correctness of this method was fully proved by gas chromatographymass spectrometry.

Zielman, B. (1991).
Threeway scaling of asymmetric proximities. Unpublished
master's thesis. Department of Data Theory, Leiden University.
1. Introduction
2. Overview of multidimensional scaling
3. Other approaches to asymmetry in MDS
4. Modelling asymmetry by skew symmetric functions
5. The algorithm
Improved estimation for Okada's algorithm; the algorithm for threeway
scaling.
6. Estimation of the asymmetric component
Estimation of the asymmetry parameters for fixed weights; finding weights for
fixed radii.
7. The SMACOF theory
8. Examples
9. Discussion

Zielman, B. (1993).
Directional analysis of threeway skewsymmetric matrices. In O.
Opitz, B. Lausen, & R. Klar, Information and classification:
Concepts, methods and applications (pp. 156161). Berlin:
Springer.
Asymmetry is a problem in multidimensional scaling because these models predict
symmetric values. A common way to solve this problem is to average the
observations across the diagonal and then analyze the symmetrized component. In
this paper a method for analyzing the departures from symmetry is extended to
handle threeway tables. The departures from symmetry are skewsymmetric and
this property is reflected in the model as a direction. An alternating least
squares algorithm is presented for estimating the parameters of the
model.

Zijlstra, B. J. H., & Kiers, H. A. L. (2002).
Degenerate solutions obtained from several variants of factor analysis.
Journal of Chemometrics, 16, 596605.
Degenerate solutions occur in several models, such as the shifted
multiplicative model, a model for component analysis of
multitraitmultimethod matrices, the directly fitted Parafac2 model, the indirectly fitted
Parafac2 model and a constrained variant of the Tucker3 model. Comparing degenerate solutions
reported in the literature with simulated ones, twofactor degenerate solutions seemed to share
the same three properties. Moreover, all analyses produce rotationally unique components, but
models which do not do so were shown not to produce degenerate components.

Zissis, K. D., Brereton, R. G., & Scott, R. (1998).
Partial leastsquares calibration of twoway diodearray highperformance liquid chromatograms:
influence of calibration design, noise and peak separation.
Analyst, 123, 11651173.
An approach for the calibration of twoway diodearray highperformance liquid
chromatograms is described, involving unfolding a threeway data matrix and performing partial
leastsquares (PLS) calibration. The properties of loadings summed over time and wavelength are
discussed. The influence of calibration design, noise levels and peak separation are investigated,
using pseudosimulations, both by calculating prediction and test errors and by graphical
representation of the summed loadings. The importance of using an independent test set is emphasized.
Calibration design is shown to have a major effect both on the appearance of the loadings and on the
PLS errors.

Zissis, K.D., Brereton, R.G., Dunkerley, S. & Escott, R.E.A.
(1999).
Twoway, unfolded threeway and threemode
partial least squares calibration of diode array
HPLC chromatograms for the quantitation of
lowlevel pharmaceutical impurities.
Analytica Chimica Acta, 384, 7181.
A series of twoway diode array chromatograms
were recorded at 0.10.5% and 15% of
3hydroxypyridine impurity coeluting with
2hydroxypyridine, recorded at pH 4.9 (good
resolution) and 5.0 (poor resolution). Four
methods for PLS calibration, namely, using summed
spectral profiles, summed elution profiles,
unfolded threeway PLS and true threeway PLS
were applied to the data sets, both using
autopredictions and crossvalidation. It was
found that it was possible to accurately quantify
low levels of impurities. Threeway methods often
performed worse than twoway methods using the
summed spectral profile probably due to
irreproducibility of elution times.
Go to other sections of the Abstracts
 A  B 
C  D 
E  F 
G  H 
I  J 
K  L 
M  N 
O  P 
Q  R 
S  T 
U  V 
W  X 
Y  Z 
Top 
Algemene
Pedagogiek 
Centre for Child and
Family Studies 
Department of Educational
Sciences 
The ThreeMode Company 
ThreeMode bibliography

P.M. Kroonenberg
Education and Child Studies, Leiden University
Wassenaarseweg 52, 2333 AK Leiden, The Netherlands
Tel. *31715273446/5273434 (secr.); fax *31715273945
Email:
kroonenb@fsw.leidenuniv.nl
First version : 12/02/1997;