Results 161 to 170 of about 138,910 (273)

The Natural Components of a Regular Linear System

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT The analysis of a finite‐dimensional regular linear system may be simplified by separating the system into its natural components. The natural components are smaller linear systems on separate subspaces whose dimensions sum to the dimension of the original linear system.
Brendan K. Beare, Phil Howlett
wiley   +1 more source

Neighborhood nonnegative matrix factorization identifies patterns and spatially-variable genes in large-scale spatial transcriptomics data. [PDF]

Genome Biol
Laursen R, Chen H, Demaray J, Pelka K, Engelhardt BE.   +4 more
europepmc   +1 more source

The Mathematical History Behind the Granger–Johansen Representation Theorem

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT When can a vector time series that is integrated once (i.e., becomes stationary after taking first differences) be described in error correction form? The answer to this is provided by the Granger–Johansen representation theorem. From a mathematical point of view, the theorem can be viewed as essentially a statement concerning the geometry of ...
Johannes M. Schumacher
wiley   +1 more source

Joint similarity nonnegative matrix factorization model for identification of recurrence-related association patterns in tumor. [PDF]

Brief Bioinform
Deng J, Lan J, Du R, Xu T, Huang K, Liu L, Chen L, Zhang Y.   +7 more
europepmc   +1 more source

Trade and Selection With Heterogeneous Firms and Perfect Competition

Review of International Economics, EarlyView.
ABSTRACT This paper extends the Heckscher–Ohlin–Samuelson framework to allow for heterogeneous firms with capacity constraints. We show that the central theorems of the HOS model (as well as their standard generalizations via duality) carry over to our setting.
Xue Bai, Arpita Chatterjee, Kala Krishna, Hong Ma   +3 more
wiley   +1 more source

Correction: Nonnegative matrix factorization for analyzing state dependent neuronal network dynamics in calcium recordings. [PDF]

Sci Rep
Carbonero D, Noueihed J, Kramer MA, White JA.   +3 more
europepmc   +1 more source

Dimension reduction for optimal design problems with Kronecker product structure

Scandinavian Journal of Statistics, EarlyView.
Abstract This paper is motivated by the problem of optimal allocation of trials in multi‐environment crop variety testing with a large number of varieties. Optimizing the allocation of trials results in the minimization of a design criterion with a Kronecker product structure in the information matrix.
Taras Bodnar, Maryna Prus
wiley   +1 more source

Nonnegative matrix factorization incorporating domain specific constraints for four dimensional scanning transmission electron microscopy. [PDF]

Sci Rep
Kimoto K, Uesugi F, Harano K, Kikkawa J, Cretu O, Shibazaki Y, Shiga M, Togo A.   +7 more
europepmc   +1 more source

Complementary Sensitivity of Fixed‐Time and Fixed‐Oscillation Regimes to Exchange and Structural Disorder in the Human Brain Revealed Using Oscillating‐Gradient Diffusion MRI With Ultra‐Strong Gradients

Magnetic Resonance in Medicine, Volume 95, Issue 6, Page 3429-3444, June 2026.
ABSTRACT Purpose Oscillating‐gradient spin‐echo (OGSE) diffusion MRI probes cell geometry and membrane integrity through the frequency‐dependence of kurtosis, but prior studies have reported inconsistent findings depending on how frequency is varied. We compared frequency‐dependent kurtosis in the human brain under two regimes: varying frequency with ...
Dongsuk Sung, Kwok‐Shing Chan, Julianna Gerold, Wen Zhong, Jialan Zheng, Qiyuan Tian, Hua Guo, Susie Y. Huang, Hong‐Hsi Lee   +8 more
wiley   +1 more source

An optimal pairwise merge algorithm improves the quality and consistency of nonnegative matrix factorization. [PDF]

IEEE Trans Signal Process
Guo Y, Holy TE.
europepmc   +1 more source