Results 171 to 180 of about 38,430 (291)

Dynamic survival risk prediction with time‐varying high‐dimensional images

Canadian Journal of Statistics, EarlyView.
Abstract Integrating longitudinal data with survival models is a prevalent strategy for dynamic survival risk prediction while accounting for subjects' longitudinally observed variables. However, existing methods primarily focus on scalar longitudinal data and seldom tackle the complexities associated with high‐dimensional longitudinal imaging data ...
Bingfan Liu, Haolun Shi, Shu Jiang, Liangliang Wang, Da Ma, Mirza Faisal Beg, Jiguo Cao, for the Alzheimer's Disease Neuroimaging Initiative   +7 more
wiley   +1 more source

Differential Iterative Joint Estimation Approach for Indoor Target Localization. [PDF]

Sensors (Basel)
Su Z, Xu J, Hao J, Han B.
europepmc   +1 more source

Power spectral density and the brain

Canadian Journal of Statistics, EarlyView.
Abstract Time series from M/EEG (magneto/electroencephalography) and ECoG (electrocorticography) recordings are common sources of information about brain function. The power spectral density (PSD) preserves much of this information, up to second order. In the current decade, a burst of brain diagnostics using the slope of log(PSD) has appeared.
Priscilla E. Greenwood, Sveinung Erland, Lawrence M. Ward   +2 more
wiley   +1 more source

Functional motifs in food webs and networks. [PDF]

Proc Natl Acad Sci U S A
Habermann M, Fahimipour AK, Yeakel JD, Gross T.   +3 more
europepmc   +1 more source

Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati, Augusto Del Zotto, Klaus Widmayer   +2 more
wiley   +1 more source

The Latent Dimensionality of Physical and Technical Performance Across Three Youth Soccer Tiers. [PDF]

J Funct Morphol Kinesiol
Preljević A, Bubanj S, Stanković D, Okičić M, Preljević D, Petković E, Kocić M, Gašić T, Bjelica B, Parčina I, Veličković SK, Mihajlović M, Dobrescu T, Sava AM.   +13 more
europepmc   +1 more source

Front Propagation Through a Perforated Wall

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT We consider a bistable reaction– diffusion equation ut=Δu+f(u)$u_t=\Delta u +f(u)$ on RN${\mathbb {R}}^N$ in the presence of an obstacle K$K$, which is a wall of infinite span with many holes. More precisely, K$K$ is a closed subset of RN${\mathbb {R}}^N$ with smooth boundary such that its projection onto the x1$x_1$‐axis is bounded and that ...
Henri Berestycki, François Hamel, Hiroshi Matano   +2 more
wiley   +1 more source

Transient dynamics and nonlinear fitness: A matrix approach to pulse and press perturbation. [PDF]

Ecology
Jaggi H, Tuljapurkar S, Zuo W, Gascoigne SJL, Kajin M, Salguero-Gómez R.   +5 more
europepmc   +1 more source

Stochastic Gradient Descent in High Dimensions for Multi‐Spiked Tensor PCA

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT We study the high‐dimensional dynamics of online stochastic gradient descent (SGD) for the multi‐spiked tensor model. This multi‐index model arises from the tensor principal component analysis (PCA) problem with multiple spikes, where the goal is to estimate the unknown signal vectors within the N$N$‐dimensional unit sphere through maximum ...
Gérard Ben Arous, Cédric Gerbelot, Vanessa Piccolo   +2 more
wiley   +1 more source

Power Laws in Empirical Eigenvalue Spectra. [PDF]

Entropy (Basel)
Liu B, Chen YY, Li MS, Morgan VT, Abdelaleem E, Sederberg A.   +5 more
europepmc   +1 more source