Results 91 to 100 of about 4,960,468 (238)

A robust partial least squares method with applications [PDF]

open access: yes, 2007
Partial least squares regression (PLS) is a linear regression technique developed to relate many regressors to one or several response variables. Robust methods are introduced to reduce or remove the effect of outlying data points.
Romera, Rosario   +2 more
core  

Homoclinic orbits in 3D dissipative systems [PDF]

open access: yesScientific Technical Review, 2014
The paper deals with a variational system corresponding to a three-dimensional dynamic system. The characteristic equation of the variational system depends on partial solutions. The matrix of the right-hand part of the variational system is a sum of two
Martynyuk Andreevich Anatoly   +1 more
doaj  

Lung Matrix Metalloproteinase Activation following Partial Hepatic Ischemia/Reperfusion Injury in Rats

open access: yesThe Scientific World Journal, 2014
Purpose. Warm hepatic ischemia-reperfusion (I/R) injury can lead to multiorgan dysfunction. The aim of the present study was to investigate whether acute liver I/R does affect the function and/or structure of remote organs such as lung, kidney, and heart
Giuseppina Palladini   +8 more
doaj   +1 more source

Matrix Theorems for Partial Differential and Difference Equations.

open access: yesMATHEMATICA SCANDINAVICA, 1966
We extend the work of Kreiss and Morton to prove: for some constant K(m), where m is the order of the matrix A, $|A^(n)v| \leq C(v)$ for all n $geq$ 0 and |v| = 1 implies that $|{SAS}^{-1}| \leq 1$ for some S with $|S^{-1}| \leq 1$, |Sv| $\leq$ k(m)C(v).
Miller, John, Strang, Gilbert
openaire   +2 more sources

A generalised matrix transfer technique for the numerical solution of fractional-in-space partial differential equations

open access: yes, 2009
n this paper we present a theoretical basis for the Matrix Transfer Technique for approximating solutions to fractional-in-space partial differential equations.
Simpson, Daniel P.   +2 more
core  

Partial parameterization of orthogonal wavelet matrix filters

open access: yesJournal of Computational and Applied Mathematics, 2013
In this paper we propose a procedure which allows the construction of a large family of FIR d x d matrix wavelet filters by exploiting the one-to-one correspondence between QMF systems and orthogonal operators which commute with the shifts by two. A characterization of the class of filters of full rank type that can be obtained with such procedure is ...
Mariantonia Cotronei   +1 more
openaire   +2 more sources

ppcor: An R Package for a Fast Calculation to Semi-partial Correlation Coefficients

open access: yesCommunications for Statistical Applications and Methods, 2015
Lack of a general matrix formula hampers implementation of the semi-partial correlation, also known as part correlation, to the higher-order coefficient.
Seongho Kim
semanticscholar   +1 more source

The Optimization on Ranks and Inertias of a Quadratic Hermitian Matrix Function and Its Applications

open access: yesJournal of Applied Mathematics, 2013
We solve optimization problems on the ranks and inertias of the quadratic Hermitian matrix function subject to a consistent system of matrix equations and .
Yirong Yao
doaj   +1 more source

Partial Algebras and Implications of (Weak) Matrix Properties

open access: yesApplied Categorical Structures
AbstractMatrix properties are a type of property of categories which includes the ones of being Mal’tsev, arithmetical, majority, unital, strongly unital, and subtractive. Recently, an algorithm has been developed to determine implications $$\textrm{M}\Rightarrow _{\textrm{lex}_*}\textrm{N}$$ M
Michael Hoefnagel, Pierre-Alain Jacqmin
openaire   +2 more sources

The manifest association structure of the single-factor model: insights from partial correlations [PDF]

open access: yes, 2007
The association structure between manifest variables arising from the single-factor model is investigated using partial correlations. The additional insights to the practitioner provided by partial correlations for detecting a single-factor model are ...
Smith, Peter W.F.   +11 more
core   +1 more source

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