Results 71 to 80 of about 4,960,468 (238)

Design of Partial Mueller-Matrix Polarimeters for Application-Specific Sensors

open access: yesSensors
At a particular frequency, most materials and objects of interest exhibit a polarization signature, or Mueller matrix, of limited dimensionality, with many matrix elements either negligibly small or redundant due to symmetry.
Brian G. Hoover, Martha Y. Takane
doaj   +1 more source

Principal matrix solutions and variation of parameters for a Volterra integro-differential equation and its adjoint

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2006
We define the principal matrix solution $Z(t,s)$ of the linear Volterra vector integro-differential equation \[ x'(t) = A(t)x(t) + \int_s^t B(t,u)x(u)\,du \] in the same way that it is defined for $x' = A(t)x$ and prove that it is the unique matrix ...
Leigh Becker
doaj   +1 more source

Existence of solutions for 4p-order PDES with Neumann boundary conditions

open access: yesMoroccan Journal of Pure and Applied Analysis, 2023
In this work, we study the existence of at least one non decreasing sequence of nonnegative eigenvalues for the problem: {Δ2pu=λm(x)u   in   Ω,∂u∂v=∂(Δu)∂v=…=∂(Δ2p-1u)∂v=0   on   ∂Ω.\left\{ {\matrix{ {{\Delta ^{2p}}u = \lambda m\left( x \right)u ...
Moradi N.   +3 more
doaj   +1 more source

Partial factorization of a dense symmetric indefinite matrix [PDF]

open access: yesACM Transactions on Mathematical Software, 2011
At the heart of a frontal or multifrontal solver for the solution of sparse symmetric sets of linear equations, there is the need to partially factorize dense matrices (the frontal matrices) and to be able to use their factorizations in subsequent forward and backward substitutions.
John K. Reid, Jennifer A. Scott
openaire   +1 more source

Complete Mueller matrix from a partial polarimetry experiment: the nine-element case.

open access: yesJournal of The Optical Society of America A-optics Image Science and Vision, 2019
We show that an incomplete, nine-element Mueller matrix with a row and a column missing, obtained in a partial polarimetry experiment, can be completed to a full, 16-element Mueller matrix, provided depolarization is absent experimentally.
R. Ossikovski, O. Arteaga
semanticscholar   +1 more source

Some results on the partial orderings of block matrices

open access: yesJournal of Inequalities and Applications, 2011
Some results relating to the block matrix partial orderings and the submatrix partial orderings are given. Special attention is paid to the star ordering of a sum of two matrices and the minus ordering of matrix product. Several equivalent conditions for
Liu Xifu, Yang Hu
doaj  

EVALUATION OF PRICE POLICY ON THE MOST IMPORTANT CEREAL CROP [PDF]

open access: yesArab Universities Journal of Agricultural Sciences, 2016
The research aimed at studying current situation improvement for grain crops production to meet international and domestic demand needs regularly with stable prices and standard specification, through analysis and assessment Egyptian price policy for ...
Wafaa Eid, Shahira Ibrahim
doaj   +1 more source

Partially isometric matrices

open access: yes, 1967
The complex, not necessarily square matrix A is called a partial isometry if the vectors x and Ax have the same Euclidean norm whenever x is in the orthogonal complement of the null space of A. The main result s of the paper give necessary and sufficient
Hearon, John Z.
core   +1 more source

Partial Multi-Label Learning With Noisy Label Identification

open access: yesIEEE Transactions on Pattern Analysis and Machine Intelligence, 2020
Partial multi-label learning (PML) deals with problems where each instance is assigned with a candidate label set, which contains multiple relevant labels and some noisy labels.
Ming-Kun Xie, Sheng-Jun Huang
semanticscholar   +1 more source

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