Results 121 to 130 of about 24,633 (240)
Best linear unbiased estimation for varying probability with and without replacement sampling
Special Matrices, 2019 When sample survey data with complex design (stratification, clustering, unequal selection or inclusion probabilities, and weighting) are used for linear models, estimation of model parameters and their covariance matrices becomes complicated.
Haslett Stephen
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Identifying Out‐of‐Voxel Echoes in Edited MRS With Phase Cycle Inversion
Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 1921-1933, April 2026.ABSTRACT Purpose To identify the origin of out‐of‐voxel (OOV) signals based on the coherence transfer pathway (CTP) formalism using signal phase conferred by the acquisition phase cycling scheme. Knowing the CTP driving OOV artifacts enables optimization of crusher gradients to improve their suppression.
Zahra Shams +14 more
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Majorization relations for Hadamard products
Linear Algebra and its Applications, 1995 \textit{C. R. Johnson} and \textit{R. B. Bapat} [Linear Algebra Appl. 104, 246- 247 (1988)] have conjectured that: if \(A\) and \(B\) are \(n \times n\) positive definite matrices with Hadamard product \(A \circ B\) then, for each \(k \leq n\), the product of the \(k\) smallest of the eigenvalues of \(A \circ B\) is at least as great as the product of ...
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Exploring Imprecise Probabilities in Quantum Algorithms with Possibility Theory
PAMM, Volume 26, Issue 1, March 2026.ABSTRACT Quantum computing utilizes the underlying principles of quantum mechanics to perform computations with unmatched performance capabilities. Rather than using classical bits, it operates on qubits, which can exist in superposition and entangled states. This enables the solution of problems that are considered intractable for classical computers.
Jan Schneider +2 more
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Quality and Reliability Engineering International, Volume 42, Issue 2, Page 553-564, March 2026.ABSTRACT The foldover technique for screening designs is well‐known to guarantee zero aliasing of the main effect estimators with respect to two‐factor interactions and quadratic effects. It is a key feature of many popular response surface designs, including central composite designs, definitive screening designs, and most orthogonal, minimally ...
Jonathan Stallrich +3 more
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Mathematics OpenThe purpose of this paper is to investigate the bounds of the spectral norms of some circulant matrices whose elements are a generalization of Jacobsthal–Lucas numbers called bi-periodic Jacobsthal–Lucas numbers by three different ways.
Sukran Uygun
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Narrower eigenbounds for Hadamard products
Linear Algebra and its Applications, 1997 The author considers the Hadamard product of two positive semidefinite matrices of order \(n\). An ``augmented'' Schur theorem is proved which yields a specific bound for each eigenvalue of the Hadamard product. The result improves the classical global bounds by \textit{I.
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A Vector Representation of Multicomplex Numbers and Its Application to Radio Frequency Signals
AxiomsHypercomplex numbers, which are multi-dimensional extensions of complex numbers, have been proven beneficial in the development of advanced signal processing algorithms, including multi-dimensional filter design, linear regression and classification.
Daniele Borio
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Using genomic selection to examine subgenome dominance and epistasis in allopolyploid strawberry
The Plant Genome, Volume 19, Issue 1, March 2026.Abstract Allopolyploids are organisms that possess multiple sets of chromosomes derived from distinct ancestral species, resulting in multiple subgenomes. Many important crops are allopolyploid, including wheat (Triticum aestivum), cotton (Gossypium hirsutum), coffee (Coffea arabica), and strawberry (Fragaria × ananassa).
Joshua A. Sleper +3 more
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Cointegrating Polynomial Regressions With Power Law Trends
Journal of Time Series Analysis, Volume 47, Issue 2, Page 331-344, March 2026.ABSTRACT The common practice in cointegrating polynomial regressions (CPRs) often confines nonlinearities in the variable of interest to stochastic trends, thereby overlooking the possibility that they may be caused by deterministic components. As an extension, we propose univariate and multivariate CPRs that incorporate power law deterministic trends.
Yicong Lin, Hanno Reuvers
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