Results 31 to 40 of about 1,286,174 (304)
Squared distance matrices of trees with matrix weights
AKCE International Journal of Graphs and Combinatorics, 2023 Let T be a tree on n vertices whose edge weights are positive definite matrices of order s. The squared distance matrix of T, denoted by Δ, is the ns × ns block matrix with [Formula: see text], where d(i, j) is the sum of the weights of the edges in the ...
Iswar Mahato, M. Rajesh Kannan
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Optimal Regularized Inverse Matrices for Inverse Problems [PDF]
SIAM Journal on Matrix Analysis and Applications, 2017 In this paper, we consider optimal low-rank regularized inverse matrix approximations and their applications to inverse problems. We give an explicit solution to a generalized rank-constrained regularized inverse approximation problem, where the key novelties are that we allow for updates to existing approximations and we can incorporate additional ...
Julianne Chung, Matthias Chung
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On F-inverse covers of inverse monoids
Journal of Pure and Applied Algebra, 2006 An inverse monoid \(F\) in which every class with respect to the smallest group congruence has a maximal element in the natural partial order is called an \(F\)-inverse monoid. Such a monoid \(F\) is an \(F\)-inverse cover of an inverse monoid \(M\) if there is an idempotent-separating onto homomorphism \(F\to M\).
Auinger, Karl, Szendrei, Maria
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Inverse melting and inverse freezing: A spin model [PDF]
Physical Review E, 2005 Systems of highly degenerate ordered or frozen state may exhibit inverse melting (reversible crystallization upon heating) or inverse freezing (reversible glass transition upon heating). This phenomena is reviewed, and a list of experimental demonstrations and theoretical models is presented.
Schupper, Nurith, Shnerb, Nadav M.
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Poisson inverse problems [PDF]
, 2006 In this paper we focus on nonparametric estimators in inverse problems for Poisson processes involving the use of wavelet decompositions. Adopting an adaptive wavelet Galerkin discretization, we find that our method combines the well-known theoretical ...
Antoniadis, Anestis, Bigot, Jérémie
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Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Background Japan has one of the highest dialysis prevalence rates worldwide and a shrinking, aging population. Whether dialysis burden has entered a sustained post‐peak phase or whether recent declines partly reflect pandemic‐related disruptions remains uncertain.
Hatice Şahin +2 more
wiley +1 more source
From mice to humans—divergent strategies for intestinal homeostasis and regeneration
FEBS Letters, EarlyView.Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa +2 more
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Inversion of Gamow’s formula and inverse scattering
American Journal of Physics, 2006 Gamow’s tunneling formula is inverted and the issue of the uniqueness of the solution is compared with the solution obtained by the method of Gel’fand and Levitan. Some insight is gained into the key differences between classical and quantum inverse scattering, which account for the fact that a potential can be uniquely determined in the latter but ...
Gandhi, Sohang C., Efthimiou, Costas J.
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Design and analysis strategies for robust microbiome ageing research
FEBS Letters, EarlyView.The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik +5 more
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AgricultureProductive and healthy soils are essential in agriculture and other economic uses of land which depend on plant growth, and are under increasing pressure globally.
Stuart Bradley
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