Results 21 to 30 of about 75 (63)
Structured Nuclear Norm Matrix Completion: Guaranteeing Exact Recovery via Block‐Column Scaling
Numerical Linear Algebra with Applications, Volume 32, Issue 4, August 2025.ABSTRACT The goal of low‐rank matrix completion is to minimize the rank of a matrix while adhering to the constraint that known (non‐missing) elements are fixed in the approximation. Minimizing rank is a difficult, non‐convex, NP‐hard problem, often addressed by substituting rank with the nuclear norm to achieve a convex relaxation.
Konstantin Usevich +3 more
wiley +1 more source
Bayesian trans‐dimensional soil behaviour type inference using conditional posterior proposals
Geophysical Prospecting, Volume 73, Issue 5, Page 1510-1533, June 2025.ABSTRACT Identification of subsurface geological profiles is indispensable to geotechnical design and construction. Subsurface stratification through Bayesian inversion of soil behaviour type index data, obtained from cone penetration tests, is achieved through the development of a novel three‐block Markov chain Monte Carlo algorithm.
Michael Conrad Koch +2 more
wiley +1 more source
N$N$‐Soliton Matrix mKdV Solutions: Some Special Solutions Revisited
Studies in Applied Mathematics, Volume 154, Issue 6, June 2025.ABSTRACT In this article, a general solution formula is derived for the d×d${\sf d}\times {\sf d}$‐matrix modified Korteweg–de Vries equation. Then, a solution class corresponding to special parameter choices is examined in detail. Roughly, this class can be described as N$N$‐solitons (in the sense of Goncharenko) with common phase matrix. It turns out
Sandra Carillo +2 more
wiley +1 more source
Road traffic estimation and algorithmic routing in a spatially dependent network
Scandinavian Journal of Statistics, Volume 52, Issue 2, Page 1058-1091, June 2025.ABSTRACT This work concerns a procedure to estimate the joint distribution of the per‐edge travel times in a road traffic network with spatial dependence. The constructed estimator, based on the realized travel times of a collection of independently operating probe vehicles traversing the network, is shown to be consistent and rate‐optimal.
Rens Kamphuis +2 more
wiley +1 more source
Spectral convergence in large finite resonator arrays: The essential spectrum and band structure
Bulletin of the London Mathematical Society, Volume 57, Issue 3, Page 730-747, March 2025.Abstract We show that the resonant frequencies of a system of coupled resonators in a truncated periodic lattice converge to the essential spectrum of the corresponding infinite lattice. We use the capacitance matrix as a model for fully coupled subwavelength resonators with long‐range interactions in three spatial dimensions.
Habib Ammari +2 more
wiley +1 more source
Journal of Software: Evolution and Process, Volume 37, Issue 2, February 2025.ABSTRACT With the advent of Quantum Computing and its exponential research endeavors in the past couple of decades, we are looking at a Golden Era of Quantum Computing. We are transitioning into an age of Hybrid Classical‐Quantum Computers, where the quantum computational resources are selectively harnessed for resource‐intensive tasks. On the one hand,
Vita Santa Barletta +4 more
wiley +1 more source
Magnetic Resonance in Medicine, Volume 93, Issue 1, Page 228-244, January 2025.Abstract Purpose To introduce quantitative rapid gradient‐echo (QRAGE), a novel approach for the simultaneous mapping of multiple quantitative MRI parameters, including water content, T1, T2*, and magnetic susceptibility at ultrahigh field strength. Methods QRAGE leverages a newly developed multi‐echo MPnRAGE sequence, facilitating the acquisition of ...
Markus Zimmermann +9 more
wiley +1 more source
Device‐Independent Dimension Leakage Null Test on Qubits at Low Operational Cost
Advanced Quantum Technologies, Volume 8, Issue 1, January 2025.Testing the two‐level space of a qubit is critical for the future of quantum computation. A simple setup allows to verify the space by a device independent null witness at extreme precision. Applied to IBM Quantum, most qubits fail the test by more than ten standard deviations, which cannot be explained by a standard model of leakage.
Tomasz Rybotycki +3 more
wiley +1 more source
Bootstrapping non‐stationary and irregular time series using singular spectral analysis
Journal of Time Series Analysis, Volume 46, Issue 1, Page 81-112, January 2025.This article investigates the consequences of using Singular Spectral Analysis (SSA) to construct a time series bootstrap. The bootstrap replications are obtained via a SSA decomposition obtained using rescaled trajectories (RT‐SSA), a procedure that is particularly useful in the analysis of time series that exhibit nonlinear, non‐stationary and ...
Don S. Poskitt
wiley +1 more source
The Wiener-Hopf technique, its generalizations and applications: constructive and approximate methods. [PDF]
Proc Math Phys Eng Sci, 2021 Kisil AV +3 more
europepmc +1 more source