Results 121 to 130 of about 5,971,680 (301)
Updating a map of sufficient conditions for the real nonnegative inverse eigenvalue problem
Special Matrices, 2019 The real nonnegative inverse eigenvalue problem (RNIEP) asks for necessary and sufficient conditions in order that a list of real numbers be the spectrum of a nonnegative real matrix.
Marijuán C. +2 more
doaj +1 more source
Moisture Absorption in Highly Porous Closed‐Cell Polymeric Foams
Polymer Engineering &Science, EarlyView.The conventional one‐dimensional hindered diffusion model has been extended into a new Void Filling Hindered Diffusion Model. By quantifying the moisture stored within closed‐cell pores, this model successfully captures the distinct absorption behaviors observed across varying foam thicknesses.
G. E. Guloglu, M. C. Altan
wiley +1 more source
On the Inverse Eigenvalue Problem for Irreducible Doubly Stochastic Matrices of Small Orders
Abstract and Applied Analysis, 2014 The inverse eigenvalue problem is a classical and difficult problem in matrix theory. In the case of real spectrum, we first present some sufficient conditions of a real r-tuple (for r=2; 3; 4; 5) to be realized by a symmetric stochastic matrix.
Quanbing Zhang +2 more
doaj +1 more source
The inverse eigenvalue problem for Leslie matrices
The Electronic Journal of Linear Algebra, 2019 The Nonnegative Inverse Eigenvalue Problem (NIEP) is the problem of determining necessary and sufficient conditions for a list of $n$ complex numbers to be the spectrum of an entry--wise nonnegative matrix of dimension $n$. This is a very difficult and long standing problem and has been solved only for $n\leq 4$.
openaire +4 more sources
Molecular Basis for Uracil‐DNA‐Glycosylase to Identify DNA Damage in the Nucleosome
Proteins: Structure, Function, and Bioinformatics, EarlyView.ABSTRACT The DNA base‐excision repair (BER) pathway is initiated by a glycosylase, such as uracil‐DNA‐glycosylase (UDG), which identifies and removes a wrong base incorporated in the DNA sequence. The very early steps in the identification of the DNA damage are crucial to the correct initiation of the repair chain, and become even more complex when ...
Safwen Ghediri +2 more
wiley +1 more source
Electronic Journal of Differential Equations, 2017 In this article, we study the inverse problem for Sturm-Liouville operators with boundary conditions dependent on the spectral parameter. We show that the potential q(x) and coefficient $\frac{a_1\lambda +b_1}{c_1\lambda +d_1}$ functions can be ...
Murat Sat
doaj
New views of some invariants associated with the Cartesian 2D velocity gradient tensor
Quarterly Journal of the Royal Meteorological Society, EarlyView.Vorticity and divergence of horizontal flow are fundamental quantities in meteorology; both are linear functions of the four elements of the 2D velocity gradient tensor and both are formally unchanged under coordinate rotation. We explore four quadratic functions of the elements that are geometrically invariant in this sense, finding some novel ...
I. Roulstone, S. A. Clough, A. A. White
wiley +1 more source
MathematicsThis paper focuses on the inverse extremal eigenvalue problem (IEEP) and a special inverse singular value problem (ISVP). First, a bordered tridiagonal matrix is constructed from the extremal eigenvalues of its leading principal submatrices and an ...
Hubert Pickmann-Soto +3 more
doaj +1 more source
Inverse Eigenvalue Problem Untuk Matriks Tridiagonal Simetrik
, 2015 Inverse eigenvalue problem adalah proses mengonstruksi suatu matriks yang mempertahankan struktur tertentu dari data tertentu. Biasanya Data yang digunakan dapat berupa informasi sebagian dari nilai eigen atau vektor eigen.
Nurfauziah
core
Quarterly Journal of the Royal Meteorological Society, EarlyView.Numerical weather prediction output necessitates calibration, as weather model systems are unable to replicate the correct statistics of observations. Such processing is especially important when predicting extreme weather. Calibration methods function by learning from prediction inadequacies during a training phase and by exploiting this information ...
Dmitrij Japs +3 more
wiley +1 more source