Results 81 to 90 of about 59,171 (165)
Cross-Work Theme Identification in Long Novels via Nonnegative Tensor Factorization
MathematicsIdentifying the major themes and recurring motifs of an author’s long novels is a basic task in literary studies. To support this task in a scalable way while retaining within-novel narrative variation, we model an author corpus as a third-order ...
Yiying Chen, Maosheng Liu, Yuning Yang
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Nonnegative Reduced Biquaternion Matrix Factorization With Applications in Color Face Recognition
Numerical Linear Algebra with Applications, Volume 33, Issue 5, October 2026.ABSTRACT Quaternion numbers are commonly used to represent color image pixels. Since color image pixels are nonnegative, nonnegativity constraint should be incorporated into the components of quaternion numbers. However, existing quaternion‐based matrix factorization models do not fully satisfy nonnegativity constraints.
Jifei Miao, Junjun Pan, Michael K. Ng
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Environmental Microbiology Reports, Volume 18, Issue 5, October 2026.The integration of multiple meta‐omics can tremendously improve our understanding of the structure, function and dynamics of the complex biological system in anaerobic digesters. Created in BioRender. https://BioRender.com/u9rj8ko. ABSTRACT Anaerobic digestion (AD) of organic wastes by microorganisms into biomethane contributes significantly towards ...
Kevin Iyere Ehiosun +2 more
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Minimal positive realizations of transfer functions with nonnegative multiple poles [PDF]
, 2005 This note concerns a particular case of the minimality problem in positive system theory. A standard result in linear system theory states that any nth-order rational transfer function of a discrete time-invariant linear single-input-single-output (SISO)
Matolcsi, Máté, Nagy, B.
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Flexible unimodal density estimation in hidden Markov models
Methods in Ecology and Evolution, Volume 17, Issue 10, Page 2994-3005, October 2026.Abstract Hidden Markov models (HMMs) are powerful tools for modelling time‐series data with underlying state structure. However, selecting appropriate parametric forms for the state‐dependent distributions is often challenging and can lead to model misspecification.
Jan‐Ole Fischer +5 more
wiley +1 more source
IEEE Transactions on Neural Systems and Rehabilitation EngineeringAlthough attentional modulation of gamma-band auditory steady-state response (gamma ASSR) has been widely investigated, variability in feature-level analytical parameter settings undermines cross-study comparability and may partly account for ...
Xianyun Kang +6 more
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European Journal of Neuroscience, Volume 64, Issue 8, October 2026.We present a multiscale computational model linking amyloid‐beta accumulation to brain network collapse in Alzheimer's disease. The spectral radius serves as an early‐warning biomarker, anticipating structural collapse by ~47 months. Progressive synaptic degradation drives a transition from synchronized activity through functional subpopulations to ...
Ediline L. F. Nguessap +2 more
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Exponent-Incidence Constraints for Tensor Eigenvectors of Multi-Hypergraphs
MathematicsWe study support-determined constraints for eigenvectors of nonnegative symmetric tensors whose support may contain repeated indices. Such tensors are naturally encoded by uniform multi-hypergraphs, where each multiedge is represented by an exponent ...
Kelly Pearson, Tan Zhang
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Global dimension of dg algebras via compact silting objects
Bulletin of the London Mathematical Society, Volume 58, Issue 10, October 2026.Abstract We introduce a notion of global dimension for a triangulated category relative to a compact silting object. We prove that the finiteness of this dimension is an intrinsic property of the triangulated category itself and, therefore, independent of the choice of the silting object.
Panagiotis Kostas
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Topological and geometric rigidity of nonnegatively curved submanifolds
Bulletin of the London Mathematical Society, Volume 58, Issue 10, October 2026.Abstract We investigate the topology and geometry of compact submanifolds in space forms of nonnegative curvature satisfying a lower bound on the sectional curvature that depends only on the length of the mean curvature vector of the immersion. We show that this condition imposes strong constraints on either the topology or geometry of the submanifold.
Theodoros Vlachos
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