Results 21 to 30 of about 561,362 (306)

Prediction of Protein Tertiary Structure via Regularized Template Classification Techniques

open access: yesMolecules, 2020
We discuss the use of the regularized linear discriminant analysis (LDA) as a model reduction technique combined with particle swarm optimization (PSO) in protein tertiary structure prediction, followed by structure refinement based on singular value ...
Óscar Álvarez-Machancoses   +2 more
doaj   +1 more source

TWO-DIMENSIONAL INVERSE SCATTERING FOR QUASI-LINEAR BIHARMONIC OPERATOR [PDF]

open access: yes, 2021
The subject of this work concerns the classical direct and inverse scattering problems for quasi-linear perturbations of the two-dimensional biharmonic operator.
Serov, V. (Valery)   +7 more
core   +1 more source

A combinatorial expression for the group inverse of symmetric M-matrices

open access: yesSpecial Matrices, 2021
By using combinatorial techniques, we obtain an extension of the matrix-tree theorem for general symmetric M-matrices with no restrictions, this means that we do not have to assume the diagonally dominance hypothesis.
Carmona A., Encinas A.M., Mitjana M.
doaj   +1 more source

Presentations of inverse semigroups, their kernels and extensions [PDF]

open access: yes, 2011
"Part of this work was done while Gray was an EPSRC Postdoctoral Research Fellow at the University of St Andrews, Scotland"Let S be an inverse semigroup and let π:S→T be a surjective homomorphism with kernel K.
Ruskuc, Nik   +8 more
core   +1 more source

Matrix Analysis for Continuous-Time Markov Chains

open access: yesSpecial Matrices, 2021
Continuous-time Markov chains have transition matrices that vary continuously in time. Classical theory of nonnegative matrices, M-matrices and matrix exponentials is used in the literature to study their dynamics, probability distributions and other ...
Le Hung V., Tsatsomeros M. J.
doaj   +1 more source

An holomorphic study of Smarandache automorphic and cross inverse property loops [PDF]

open access: yes, 2008
By studying the holomorphic structure of automorphic inverse property uasigroups and loops[AIPQ and (AIPL)] and cross inverse property quasigroups and loops[CIPQ and (CIPL)], it is established that the holomorph of a loop is a Smarandache; AIPL, CIPL, K ...
Gbolahan, Temitoe   +1 more
core   +1 more source

Robust Prediction of Single and Multiple Point Protein Mutations Stability Changes

open access: yesBiomolecules, 2019
Accurate prediction of protein stability changes resulting from amino acid substitutions is of utmost importance in medicine to better understand which mutations are deleterious, leading to diseases, and which are neutral.
Óscar Álvarez-Machancoses   +3 more
doaj   +1 more source

Inverse-Designed Photonic Crystal Circuits for Optical Beam Steering

open access: yes, 2021
The ability of photonic crystal waveguides (PCWs) to confine and slow down light makes them an ideal component to enhance the performance of various photonic devices, such as optical modulators or sensors.
Jelena Vučković (3963212)   +3 more
core   +2 more sources

Inverse Renormalization Group in Quantum Field Theory [PDF]

open access: yes, 2022
We propose inverse renormalization group transformations within the context of quantum field theory that produce the appropriate critical fixed point structure, give rise to inverse flows in parameter space, and evade the critical slowing down effect in ...
Gert Aarts   +2 more
core   +4 more sources

Characterizations of the group invertibility of a matrix revisited

open access: yesDemonstratio Mathematica, 2022
A square complex matrix AA is said to be group invertible if there exists a matrix XX such that AXA=AAXA=A, XAX=XXAX=X, and AX=XAAX=XA hold, and such a matrix XX is called the group inverse of AA.
Tian Yongge
doaj   +1 more source

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