Results 271 to 280 of about 863,168 (361)

Noisy matrix completion for longitudinal data with subject‐ and time‐specific covariates

Canadian Journal of Statistics, EarlyView.
Abstract In this article, we consider the imputation of missing responses in a longitudinal dataset via matrix completion. We propose a fixed‐effect, longitudinal, low‐rank model that incorporates both subject‐specific and time‐specific covariates. To solve the optimization problem, a two‐step optimization algorithm is proposed, which provides good ...
Zhaohan Sun, Yeying Zhu, Joel A. Dubin
wiley   +1 more source

Controllability and heterogeneity of river networks using spectral graph theory approach. [PDF]

Sci Rep
Sarker S, Singh A, Veremyev A, Boginski V, Peckham S.   +4 more
europepmc   +1 more source

Almost diagonal matrices with multiple or close eigenvalues

, 1968
J. H. Wilkinson
openalex   +1 more source

On an eigenvalue problem [PDF]

Quarterly of Applied Mathematics, 1962
openaire   +2 more sources

Free energy expansions of a conditional GinUE and large deviations of the smallest eigenvalue of the LUE

Communications on Pure and Applied Mathematics, EarlyView.
Abstract We consider a planar Coulomb gas ensemble of size N$N$ with the inverse temperature β=2$\beta =2$ and external potential Q(z)=|z|2−2clog|z−a|$Q(z)=|z|^2-2c \log |z-a|$, where c>0$c>0$ and a∈C$a \in \mathbb {C}$. Equivalently, this model can be realised as N$N$ eigenvalues of the complex Ginibre matrix of size (c+1)N×(c+1)N$(c+1) N \times (c+1)
Sung‐Soo Byun, Seong‐Mi Seo, Meng Yang   +2 more
wiley   +1 more source

Exploring Phylogenetic Signal in Multivariate Phenotypes by Maximizing Blomberg's K. [PDF]

Syst Biol
Mitteroecker P, Collyer ML, Adams DC.
europepmc   +1 more source

Eigenvalues of the neutron transport operator for a homogeneous finite moderator

, 1967
Seiji Ukai
openalex   +1 more source

The Electronic Spin State of Diradicals Obtained from the Nuclear Perspective: The Strange Case of Chichibabin Radicals

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The electronic spin state of two Chichibabin radicals is investigated using 2‐dimensional hyperfine correlated Electron Nuclear Double Resonance. The protons (I=1/2) act as a reference for the electronic spin quantum number (S) via their hyperfine interactions.
Gabriel Moise, Saleta Fernández, Kit Joll, Mikhail V. Vaganov, Fátima García, Christiane R. Timmel, Diego Peña, Arzhang Ardavan   +7 more
wiley   +1 more source

Efficient preconditioning strategies for accelerating GMRES in block-structured nonlinear systems for image deblurring. [PDF]

PLoS One
Khalid R, Ahmad S, Medani M, Said Y, Ali I.   +4 more
europepmc   +1 more source